CN215251584U - Constant pressure device for lap of papermaking felt needling combination machine - Google Patents

Abstract

A constant pressure device for a lap of a papermaking felt needling combination machine belongs to the technical field of non-woven machinery. Comprises an outer sleeve fixed with the needling machine, and a limiting contact piece fixing bolt sliding groove is arranged on the wall body of the outer sleeve; the lifting inner sleeve is matched with the outer sleeve cavity, and a limiting block sliding matching groove is formed in the outer wall of the lifting inner sleeve; the inner sleeve lifting limit position signal triggering mechanism is fixed with the lower end of the lifting inner sleeve, and the inner sleeve lifting upper limit position signal acquisition mechanism and the inner sleeve lifting lower limit position signal acquisition mechanism are fixed with the outer wall of the outer sleeve; the inner sleeve lifting executing mechanism is arranged in the outer sleeve cavity and is connected with the lower end of the lifting inner sleeve; the power mechanism is fixed with the lower end of the outer sleeve and is in transmission connection with the inner sleeve lifting execution mechanism; the wool net roller pressure sensing mechanism is arranged at the top of the lifting inner sleeve, and the wool net roller end supporting mechanism is arranged above the wool net roller pressure sensing mechanism. The advantages are that: improve the transmission efficiency, reduce the inspection and maintenance workload in daily use and simplify the structure.

Description

Constant pressure device for lap of papermaking felt needling combination machine

Technical Field

The utility model belongs to the technical field of nonwoven machinery, concretely relates to papermaking felt acupuncture combination machine lap constant voltage equipment.

Background

The aforementioned papermaking felt is a fabric felt used in the papermaking industry for paper formation and conveyance, and is classified into a wet felt, an upper felt, and a dry felt according to a location on a papermaking machine. The papermaking felt is divided into two types of machine weaving and needle punching, wherein the machine weaving is carried out by adopting wool and nylon short fiber blended yarns and carrying out the working procedures of weaving, felting, fluffing, drying and shaping and the like. The needling is carried out by carding wool and chemical staple fiber such as nylon staple fiber into fiber net, overlapping multiple layers, and needling. The wool roll is a wool net roll. For technical information on papermaking felts, see also patents CN101638860B (papermaking felt and method for making the same), CN107604737B (a moisture-absorbing and air-permeable papermaking felt and method for making the same), CN111806033A (a papermaking press felt) and CN111424459A (a multi-layer composite high pressure-resistant papermaking felt and method for making the same), etc.

The aforesaid felt needling combination machine is substantially distributed and sequentially needling by a plurality of needle machines according to the process or working procedure requirements, and the technical information about the felt needling machine can be referred to CN102011272B (side opening and closing device of the endless felt needling machine), CN101122068A (non-joint industrial needle machine with four needle regions needling), CN101122069A (non-joint industrial needle machine), CN101122067A (non-end industrial needle machine), CN102134789B (high-speed wide felt needling device), CN109537170A (novel high-efficiency anti-broken needle felt needling machine), CN109594202A (high-precision needle beam and needle plate mechanism for the felt needling machine), and the like.

As known in the art, when the felt web exiting from the felt roll is needled with the base fabric, which is a needle-punched fabric as a base after the needling process, it is necessary to ensure that the felt roll (felt roll) is gradually unwound with the base fabric. In order to meet the requirement of good unwinding of the wool net roll and good bonding of the wool net roll and the base cloth, the wool net roll needs to be directly pressed on the base cloth, but in the actual operation process, namely in the process of unwinding (unwinding) the wool net roll along with the base cloth, the pressure of the wool net roll acting on the base cloth is correspondingly reduced gradually as the diameter of the wool net roll is reduced gradually, so that the uniform distribution effect of the wool net cloth on the base cloth is seriously influenced, and finally the quality of the papermaking felt cannot be guaranteed. Needless to say, the pressure exerted on the base fabric by the lap rolls is consistent regardless of the change in the diameter of the lap, and therefore the search for such a useful technical measure is of positive significance.

The invention patent application proposal of China is proposed with publication number CN110203730A and name "a unwinding device of felt needle machine for papermaking" is designed to solve the above technical problems, and can embody three advantages summarized in paragraphs 0023 to 0025 of the specification to a certain extent, but has the following disadvantages: first, as can be seen from the descriptions in paragraphs 0054 to 0056 of the specification, a power mechanism for driving the lap roller to ascend and descend adopts a worm and gear structure, and although the worm and gear structure has the characteristics of relatively stable transmission, low noise, good self-locking property and the like, the worm and gear structure has low transmission efficiency and serious abrasion, so that troubles are caused to the inspection and the maintenance in daily use; secondly, although the patent application is provided with a pressure sensor for sensing the weight of the wool net roll, the pressure sensor feeds back the information, namely a signal, of the weight change of the wool net roll to the PLC, and the PLC controls whether the worm gear moves or not in real time on line, due to the lack of technical measures for controlling the lifting limit position of the wool roll, the operation intensity of an operator is increased to a certain extent by people who are on-line personnel, namely operators, because the specifications of the papermaking felt are different and the texture and the gram weight of the wool net cloth are also different for different customers using the papermaking felt, and the base cloth with different gram weights and the wool net cloth only control whether the worm gear works or not by the weighing signal of the pressure sensor; thirdly, the patent application does not give technical information on the specific structure of the whole lifting mechanism and its reasonable assembly relationship, and especially, as can be seen from the teaching of the patent application, it is not enough to support the whole unwinding device on the floor, so that it is not well accompanied with the needle loom in the use state, so that the equipment arrangement of the production line is dispersed and difficult to be moved conveniently with the moving of the needle loom flexibly as required. In view of the foregoing, and not by way of limitation, there is a need for improvements in the art that will be described below.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a help abandoning worm gear's drive transmission mode and can promoting the transmission efficiency and alleviate the work load of examining and protecting in daily use, have and be convenient for break away from the weight change restriction that receives the coarse cotton cloth and can detect the lift extreme position of wool winding roller automatically and need not to reduce the operating strength of operator by the online artificial observation of operator, be of value to can use the needle loom to set up as the carrier under the user state and can satisfy the requirement that moves along with the removal of needle loom and embody the flexibility and the convenience that the equipment arranged in the use, be favorable to embodying the concise of structure and the miniaturization of volume and can satisfy the requirement of manufacturing convenient assembly and save the requirement that occupies the space during use.

The utility model discloses a task is accomplished like this, a papermaking woollen blanket acupuncture combination machine lap constant voltage equipment, including an outer sleeve, the outer sleeve is fixed with the needle loom through an outer sleeve cohesion fixing device under the user state, and set up the spacing contact fixing bolt sliding tray that is used for making the outer sleeve cavity of the outer sleeve communicate with the external world on the wall body of the outer sleeve in the longitudinal condition; the lifting inner sleeve is in sliding fit with the outer sleeve cavity in a vertically moving mode, and a limiting block sliding fit groove is formed in the outer wall of the lifting inner sleeve in a longitudinal state; the inner sleeve lifting limit position signal trigger mechanism is fixed with the lower end of the lifting inner sleeve at a position corresponding to the sliding groove of the limit contact fixing bolt, the inner sleeve lifting upper limit position signal acquisition mechanism is fixed with the outer wall of the outer sleeve at a position corresponding to the upper part of the inner sleeve lifting limit position signal trigger mechanism, and the inner sleeve lifting lower limit position signal acquisition mechanism is also fixed with the outer wall of the outer sleeve at a position corresponding to the lower part of the inner sleeve lifting limit position signal trigger mechanism; the inner sleeve lifting actuating mechanism is arranged in the outer sleeve cavity and is connected with the lower end of the lifting inner sleeve; the power mechanism is used for enabling the inner sleeve lifting actuating mechanism to work, and is fixed with the lower end of the outer sleeve and in transmission connection with the inner sleeve lifting actuating mechanism; the device comprises a wool net roller end supporting mechanism and a wool net roller pressure sensing mechanism, wherein the wool net roller pressure sensing mechanism is arranged at the top of the lifting inner sleeve, and the wool net roller end supporting mechanism is arranged above the wool net roller pressure sensing mechanism.

In a specific embodiment of the present invention, an outer sleeve end plate is fixed at a position corresponding to a lower end face of the outer sleeve, an inner sleeve lifting guide limiting block cavity for communicating the outer sleeve cavity with the outside is provided at the upper end of the outer sleeve, an inner sleeve lifting guide limiting mechanism is provided at a position corresponding to the inner sleeve lifting guide limiting block cavity, the inner sleeve lifting guide limiting mechanism contacts with an outer wall of the lifting inner sleeve, and an outer sleeve fixing sleeve is fixed around the outer wall of the outer sleeve at a position on the outer wall of the outer sleeve and below the inner sleeve lifting guide limiting mechanism; the power mechanism used for enabling the inner sleeve lifting actuating mechanism to work is fixed with the outer sleeve end disc at a position corresponding to the lower part of the outer sleeve end disc; an inner sleeve supporting ring is fixed at the upper end of the lifting inner sleeve and in a lifting inner sleeve cavity of the lifting inner sleeve, and the upper surface of the inner sleeve supporting ring is flush with the upper surface of the lifting inner sleeve; the wool net roller pressure sensing mechanism and the wool net roller end supporting mechanism are fixed on the upper surface of the inner sleeve supporting ring; the upper part of the outer sleeve embracing fixing device is fixed with the outer sleeve fixing sleeve, and the lower part of the outer sleeve embracing fixing device is fixed with the outer sleeve in an embracing way at a position corresponding to the upper part of the outer sleeve end disc.

The utility model discloses a another concrete embodiment the fixed ring of inner skleeve guide sliding sleeve has been put to the cover on the upper end outer wall of outer sleeve, has offered inner skleeve guide sliding sleeve set screw hole at the interval around this inner skleeve guide sliding sleeve fixed ring, is furnished with inner skleeve guide sliding sleeve set screw in the position corresponding to this inner skleeve guide sliding sleeve set screw hole, inlays at the position corresponding to the fixed ring upper portion of inner skleeve guide sliding sleeve and is furnished with an inner skleeve guide sliding sleeve, the outer wall of lift inner skleeve and the inner wall sliding fit of this inner skleeve guide sliding sleeve, inner skleeve guide sliding sleeve set screw revolve to inner skleeve guide sliding sleeve.

In another specific embodiment of the present invention, the inner sleeve lifting limit position signal triggering mechanism includes a limit contact fixing bolt and a limit contact, the limit contact fixing bolt extends into the outer sleeve cavity towards one end of the outer sleeve cavity at a position corresponding to the sliding groove of the limit contact fixing bolt and is fixed with the lower end of the lifting inner sleeve, one end of the limit contact fixing bolt departing from the outer sleeve cavity extends out of the outer sleeve cavity and is constituted as a limit contact fixing end, and the limit contact is fixed at the limit contact fixing end and corresponds to a position between the inner sleeve lifting upper limit position signal collecting mechanism and the inner sleeve lifting lower limit position signal collecting mechanism; the number of the limit contact fixing bolts is a pair which is corresponding to each other up and down.

The utility model discloses a further concrete embodiment, inner skleeve go up extreme position signal acquisition mechanism include that inner skleeve goes up extreme position signal collector support and an inner skleeve and goes up extreme position signal collector, inner skleeve goes up extreme position signal collector support orientation the one end of outer sleeve corresponding to the position of spacing contact fixing bolt's top with the outer wall of outer sleeve is fixed, and the one end that outer sleeve was kept away from to inner skleeve goes up extreme position signal collector support is folded and is spread and have an inner skleeve and go up extreme position signal collector support hem to go up extreme position signal collector support hem at this inner skleeve and set up a pair of upper adjustment groove that is parallel to each other with longitudinal condition, inner skleeve go up extreme position signal collector through a pair of inner skleeve go up extreme position signal collector set screw in the position corresponding to a pair of upper adjustment groove go up down the regulation ground with inner skleeve goes up extreme position signal collector The inner sleeve ascending limit position signal collector inductor of the inner sleeve ascending limit position signal collector corresponds to the upper part of the limit contact piece; the inner sleeve lifting lower limit position signal acquisition mechanism comprises an inner sleeve descending limit position signal collector bracket and an inner sleeve descending limit position signal collector, one end of the inner sleeve descending limit position signal collector bracket, facing the outer sleeve, is fixed with the outer wall of the outer sleeve at a position corresponding to the lower part of the limit contact fixing bolt, one end of the inner sleeve descending limit position signal collector bracket, far away from the outer sleeve, is folded and unfolded with an inner sleeve descending limit position signal collector bracket folded edge, a pair of mutually parallel lower adjusting grooves are arranged on the inner sleeve descending limit position signal collector bracket folded edge in a longitudinal state, the inner sleeve descending limit position signal collector is vertically adjusted and fixed with the inner sleeve descending limit position signal collector bracket folded edge at a position corresponding to the pair of lower adjusting grooves through a pair of inner sleeve descending limit position signal collector fixing screws, and the inner sleeve descending limit position signal collector inductor of the inner sleeve descending limit position signal collector corresponds to the lower part of the limit contact piece; the limiting contact piece is acted with an inner sleeve ascending limit position signal collector inductor of an inner sleeve ascending limit position signal collector or acted with an inner sleeve descending limit position signal collector inductor of an inner sleeve descending limit position signal collector; the inner sleeve ascending limit position signal collector and the inner sleeve descending limit position signal collector are microswitches, travel switches, position proximity switches, reed pipes or Hall sensing elements.

In still another specific embodiment of the present invention, the inner sleeve lifting actuator includes a screw, a screw moving nut, a screw supporting bearing seat and a screw moving nut guiding sliding sleeve, the screw supporting bearing seat is disposed at a central position corresponding to the outer sleeve end disc, the lower portion of the outer sleeve cavity of the outer sleeve is fixed to the outer sleeve end disc through a screw supporting bearing seat screw, the lower end of the screw is rotatably supported on the screw supporting bearing seat through a screw bearing, the lower end of the screw extends to a position below the screw supporting bearing seat and forms a screw transmission connector, the upper end of the screw is disposed in the outer sleeve cavity, the screw moving nut is in threaded fit with the screw, the screw moving nut is fixed to the lower end of the lifting inner sleeve through a screw moving nut fixing screw, the screw moving nut guiding sliding sleeve is embedded in the screw moving nut, and the outer wall of the screw moving nut guiding sliding sleeve is in sliding fit with the cavity wall of the outer sleeve cavity And the power mechanism is in transmission connection with the screw transmission connector.

In a more specific embodiment of the present invention, the power mechanism includes a motor, a reduction box, a coupling and a reduction box support, the motor is in transmission fit with the reduction box and is fixed by the reduction box together with the middle downward end of the motor and the reduction box support, the final power output shaft of the reduction box extends to the upper side of the reduction box support, the coupling is connected between the final power output shaft of the reduction box and the screw transmission connector, the reduction box support is U-shaped and the upper parts of the two sides of the reduction box support are fixed with the downward side of the outer sleeve end disc; the motor is a servo motor with a positive and negative rotation function.

In yet another specific embodiment of the present invention, the pressure sensing mechanism of the roller press comprises a pressure sensor fixing seat, a pressure sensor and a roller seat connecting plate, wherein the pressure sensor fixing seat is fixed to the inner sleeve supporting ring by a pressure sensor fixing seat screw at a position corresponding to the upper side of the inner sleeve supporting ring, and the pressure sensor fixing seat is formed with a pressure sensor cavity, the pressure sensor is disposed in the pressure sensor cavity, one end of the roller seat connecting plate is formed with a connecting plate pivot pin shaft sleeve, the connecting plate pivot pin shaft sleeve is pivotally connected to one end of the pressure sensor fixing seat by a connecting plate pivot pin shaft, and the other end of the roller seat connecting plate is formed as a free end and is supported on the upper portion of the pressure sensor; the end part supporting mechanism of the coarse screen roller is connected with the roller seat connecting plate.

In yet a further embodiment of the present invention, the end supporting mechanism of the roller for the woolen web comprises a U-shaped frame, a first roller i, a second roller ii, a roller plate for the roller for the woolen web, a roller plate for the roller for the woolen web, a pair of first roller bearing blocks i and a pair of second roller bearing blocks ii, the U-shaped frame is located above the roller base connecting plate and fixed to the roller base connecting plate by U-shaped frame fixing screws, the pair of first roller bearing blocks i are fixed to the left end of the U-shaped frame cavity of the U-shaped frame in a state of being in front-to-back correspondence with each other, the pair of second roller bearing blocks ii are fixed to the right end of the U-shaped frame cavity of the U-shaped frame in a state of being in front-to-back correspondence with each other, the first roller i is rotatably disposed in the middle of the first roller shaft i, and both ends of the first roller shaft i are respectively positioned on the pair of first roller bearing blocks i, the second roller II is rotatably arranged in the middle of a second roller shaft II, two ends of the second roller shaft II are respectively positioned on the pair of second roller shaft supporting seats II, the front end of a wool lap roller shaft head side limiting roller plate is in adjusting connection with the right end of the U-shaped frame, the rear end of the wool lap roller shaft head side limiting roller plate is a horizontal cantilever end, the wool lap roller shaft head side limiting roller is rotatably arranged at the left end of the limiting roller shaft, and the right end of the limiting roller shaft is fixed with the rear end of the wool lap roller shaft head side limiting roller plate.

In yet another specific embodiment of the present invention, the inner sleeve lifting guide limiting mechanism includes an inner sleeve sliding limiting block, a limiting block matching plate and a cover plate, the inner sleeve sliding limiting block is disposed on the outer sleeve at a position corresponding to the inner sleeve lifting guide limiting block cavity and the inner sleeve sliding limiting block contacts with the outer wall of the lifting inner sleeve towards one side of the lifting inner sleeve, the limiting block matching plate is fixed with the inner sleeve sliding limiting block through the cover plate, a limiting block probing cavity is disposed on the limiting block matching plate and at a position corresponding to the inner sleeve sliding limiting block, and the inner sleeve sliding limiting block probes into the limiting block probing cavity and is limited by the cover plate; the outer sleeve embracing fixing device comprises an upper fixing arm, a lower fixing arm and a fixing arm connecting rod, wherein the upper fixing arm faces towards one end of the outer sleeve, a matched hoop is fixed on the outer sleeve, the matched hoop is arranged on the outer sleeve at a position corresponding to the lower part of the outer sleeve fixing sleeve and matched with the outer sleeve and fixed with the outer sleeve fixing sleeve, the other end of the upper fixing arm is fixed with the needling machine in a use state, one end of the lower fixing arm facing towards the outer sleeve is fixed with a pair of outer sleeve lower matched hoops, the outer sleeve lower matched hoops are corresponding to the position above an outer sleeve end disc and embracing with the outer sleeve and fixed with the outer sleeve, the other end of the lower fixing arm is fixed with the needling machine in a use state, and the fixing arm connecting rod is connected between the upper fixing arm and one end of the lower fixing arm facing towards the outer sleeve.

One of the technical effects of the technical proposal provided by the utility model is that the power mechanism abandons the drive transmission mode of the worm gear, thereby improving the transmission effect, reducing the inspection and protection workload in daily use and simplifying the self structure of the power mechanism; secondly, because the inner sleeve lifting limit position signal triggering mechanism, the inner sleeve lifting upper limit position signal acquisition mechanism and the inner sleeve lifting lower limit position signal acquisition mechanism are adopted, the lifting limit positions of the inner sleeve, the inner sleeve roller end supporting mechanism, the wool net roller pressure sensing mechanism and the wool net roller supported on the wool net roller end supporting mechanism in the using state can be automatically controlled without being limited by the gram weight change of the wool net cloth, online manual observation and electrical operation of operator personnel are not needed, and the operation intensity of the operator personnel can be reduced; thirdly, the needle machine can be conveniently connected with the outer sleeve embracing and fixing device, so that the needle machine can move along with the movement of the needle machine, and the flexibility and the convenience of equipment arrangement are embodied; fourthly, because the whole structure is simple and the volume is small, the manufacture and the assembly are convenient, and the occupation of the space can be saved.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is a schematic view of the present invention installed on a needle machine.

Fig. 4 is an enlarged view of a portion a of fig. 3.

Detailed Description

In order to make the technical essence and advantages of the present invention more clear, the applicant below describes in detail the embodiments, but the description of the embodiments is not a limitation of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not essential, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are exemplified by the position state of fig. 1, and thus, it should not be understood as a particular limitation to the technical solution provided by the present invention.

Referring to fig. 1 and 2 in conjunction with fig. 3 and 4, an outer sleeve 1 is shown, the outer sleeve 1 is fixed with a needling machine 20 by an outer sleeve embracing fixing device 11 illustrated by fig. 3 and 4 in a using state, and a limit contact fixing bolt sliding groove 13 for communicating an outer sleeve cavity 12 of the outer sleeve 1 with the outside is formed on a wall body of the outer sleeve 1 in a longitudinal state; a lifting inner sleeve 2 is shown, the lifting inner sleeve 2 is slidably fitted with the outer sleeve cavity 12 in a vertically moving manner, that is, the lifting inner sleeve 2 moves (lifts) vertically in the outer sleeve cavity 12, and a stopper slidably fitting groove 21 (also referred to as a "stopper slidably fitting cavity") is formed in the outer wall of the lifting inner sleeve 2 in a longitudinal state; an inner sleeve lifting limit position signal triggering mechanism 3, an inner sleeve lifting upper limit position signal acquiring mechanism 4 and an inner sleeve lifting lower limit position signal acquiring mechanism 10 are shown, the inner sleeve lifting limit position signal triggering mechanism 3 is fixed with the lower end of the lifting inner sleeve 2 at a position corresponding to the limiting contact fixing bolt sliding groove 13, the inner sleeve lifting upper limit position signal acquiring mechanism 4 is fixed with the outer wall of the outer sleeve 1 at a position corresponding to the upper part of the inner sleeve lifting limit position signal triggering mechanism 3, and the inner sleeve lifting lower limit position signal acquiring mechanism 10 is also fixed with the outer wall of the outer sleeve 1 at a position corresponding to the lower part of the inner sleeve lifting limit position signal triggering mechanism 3; an inner sleeve lifting actuator 5 is shown, the inner sleeve lifting actuator 5 being disposed within the outer sleeve cavity 12 and connected to the lower end of the lifting inner sleeve 2; a power mechanism 6 for operating the inner sleeve lifting actuating mechanism 5 is shown, and the power mechanism 6 is fixed with the lower end of the outer sleeve 1 and is in transmission connection with the inner sleeve lifting actuating mechanism 5; a fleece roller end support mechanism 7 and a fleece roller pressure sensing mechanism 8 are shown, the fleece roller pressure sensing mechanism 8 being arranged on top of the aforesaid lifting inner sleeve 2, the fleece roller end support mechanism 7 being arranged above the fleece roller pressure sensing mechanism 8.

Focusing on fig. 1 and 2, an outer sleeve end disc 14 is fixed at a position corresponding to the lower end face of the outer sleeve 1, an inner sleeve elevation guide limiting block cavity 15 for communicating the outer sleeve cavity 12 with the outside is opened at the upper end of the outer sleeve 1, an inner sleeve elevation guide limiting mechanism 9 is arranged at a position corresponding to the inner sleeve elevation guide limiting block cavity 15, the inner sleeve elevation guide limiting mechanism 9 is in contact with the outer wall of the elevation inner sleeve 2, an outer sleeve fixing sleeve 16 is fixed on the outer wall of the outer sleeve 1 and below the inner sleeve elevation guide limiting mechanism 9 around the periphery of the outer wall of the outer sleeve 1 preferably in a welding manner, a fixing sleeve screw hole 161 is opened on the outer sleeve fixing sleeve 16, and a fixing sleeve screw 1611 is arranged on the fixing sleeve screw hole 161; the power mechanism 6 for operating the inner socket lifting actuator 5 is fixed to the outer socket end disc 14 at a position corresponding to the lower part of the outer socket end disc 14; an inner sleeve supporting ring 221 is fixed at the upper end of the lifting inner sleeve 2 and positioned in the lifting inner sleeve cavity 22 of the lifting inner sleeve 2 through inner sleeve supporting ring fixing screws 2211 distributed at intervals, the upper surface of the inner sleeve supporting ring 221 is flush with the upper surface of the lifting inner sleeve 2, and pressure sensor fixing seat screw holes 2212 are arranged on the upper surface of the inner sleeve supporting ring 221 at intervals around the inner sleeve supporting ring 221; the wool roller pressure sensing mechanism 8 and the wool roller end supporting mechanism 7 are fixed on the upper surface of the inner sleeve supporting ring 221 at the position corresponding to the screw hole 2212 of the pressure sensor fixing seat; the upper part of the outer sleeve embracing fixing device 11 shown in fig. 3 and 4 is fixed with the outer sleeve fixing sleeve 16, and the lower part of the outer sleeve embracing fixing device 11 is embracing fixed with the outer sleeve 1 at a position corresponding to the upper part of the outer sleeve end disc 14.

An inner sleeve guide sliding sleeve fixing ring 17 is sleeved on the outer wall of the upper end of the outer sleeve 1, inner sleeve guide sliding sleeve fixing screw holes 171 are arranged around the inner sleeve guide sliding sleeve fixing ring 17 at intervals, inner sleeve guide sliding sleeve fixing screws 1711 are arranged at positions corresponding to the inner sleeve guide sliding sleeve fixing screw holes 171, an inner sleeve guide sliding sleeve 172 is embedded at a position corresponding to the upper portion of the inner sleeve guide sliding sleeve fixing ring 17, the outer wall of the lifting inner sleeve 2 is in sliding fit with the inner wall of the inner sleeve guide sliding sleeve 172, and the inner sleeve guide sliding sleeve fixing screws 1711 are screwed to the inner sleeve guide sliding sleeve 172. As will be understood from the above-mentioned terms of the inner sleeve guide sleeve 172, the function thereof is to guide the inner sleeve 2 to slide up and down.

Continuing to refer to fig. 1 and 2, the inner sleeve lifting limit position signal triggering mechanism 3 comprises a limit contact fixing bolt 31 and a limit contact 32, wherein the limit contact fixing bolt 31 extends into the outer sleeve cavity 12 towards one end of the outer sleeve cavity 12 at a position corresponding to the limit contact fixing bolt sliding groove 13 and is fixed with the lower end of the lifting inner sleeve 2 in a threaded manner, one end of the limit contact fixing bolt 31, which is far away from the outer sleeve cavity 12, extends out of the outer sleeve cavity 12 and is formed as a limit contact fixing end, and the limit contact 32 is fixed at the limit contact fixing end and corresponds to a position between the inner sleeve lifting upper limit position signal collecting mechanism 4 and the inner sleeve lifting lower limit position signal collecting mechanism 10; in the present embodiment, there are a pair of the above-described limit contact fixing bolts 31 in the number corresponding to each other up and down.

The inner sleeve ascending and descending upper limit position signal acquisition mechanism 4 comprises an inner sleeve ascending limit position signal collector bracket 41 and an inner sleeve ascending limit position signal collector 42, wherein the inner sleeve ascending limit position signal collector bracket 41 is fixed (in a welding mode or in a fastening mode) with the outer wall of the outer sleeve 1 at a position corresponding to the upper part of the limiting contact fixing bolt 31 towards one end of the outer sleeve 1, an inner sleeve ascending limit position signal collector bracket folded edge 411 is folded and unfolded at one end of the inner sleeve ascending limit position signal collector bracket 41 away from the outer sleeve 1, a pair of upper adjusting grooves 4111 which are parallel to each other is longitudinally arranged on the inner sleeve ascending limit position signal collector bracket folded edge 411, and the inner sleeve ascending limit position signal collector 42 corresponds to the pair of upper adjusting grooves 4111 through a pair of inner sleeve ascending limit position signal collector fixing screws 422 4111 is fixed to the above-mentioned inner sleeve ascending limit position signal collector bracket flange 411 with its position adjusted up and down, and the inner sleeve ascending limit position signal collector inductor 421 (also called inner sleeve ascending limit position signal collector induction pin, etc.) of the inner sleeve ascending limit position signal collector 42 corresponds to the upper part of the above-mentioned limit contact 32; the inner sleeve lifting lower limit position signal acquisition mechanism 10 comprises an inner sleeve lower limit position signal collector bracket 101 and an inner sleeve lower limit position signal collector 102, the inner sleeve lower limit position signal collector bracket 101 is fixed with the outer wall of the outer sleeve 1 at a position corresponding to the lower part of the limit contact fixing bolt 31 towards one end of the outer sleeve 1 (the fixing mode can be welding or can adopt a fastener such as a screw), one end of the inner sleeve lower limit position signal collector bracket 101, which is far away from the outer sleeve 1, is folded and unfolded with an inner sleeve lower limit position signal collector bracket folding edge 1011, a pair of lower adjusting grooves 10111 which are parallel to each other are formed in the inner sleeve lower limit position signal collector bracket folding edge 1011 in a longitudinal state, and the inner sleeve lower limit position signal collector 102 is arranged on the lower adjusting grooves 10111 corresponding to the lower adjusting grooves 10111 through a pair of inner sleeve lower limit position signal collector fixing bolts 1022 The position is adjusted up and down and fixed with the bracket folding edge 1011 of the inner sleeve descending limit position signal collector, and an inner sleeve descending limit position signal collector inductor 1021 (also called an inner sleeve descending limit position signal collector induction foot, etc.) of the inner sleeve descending limit position signal collector 102 corresponds to the lower part of the limit contact piece 32; the limit contact 32 interacts with the inner sleeve ascending limit position signal collector inductor 421 of the inner sleeve ascending limit position signal collector 42 or interacts with the inner sleeve descending limit position signal collector inductor 1021 of the inner sleeve descending limit position signal collector 102.

In the present embodiment, the inner sleeve upward limit position signal collector 42 and the inner sleeve downward limit position signal collector 102 are travel switches, but a micro switch, a position proximity switch, a reed switch or even a hall sensor may be used.

When the inner sleeve elevating actuator 5 is actuated by the power mechanism 6 to be described below, for example, when the elevating inner sleeve 2 is raised upward and the upper edge of the limit contact piece 32 is raised to touch the inner sleeve upward limit position signal collector inductor 421 of the inner sleeve upward limit position signal collector 42, a signal is fed back to a PLC (programmable controller) by the inner sleeve upward limit position signal collector 42, and the PLC gives a command to the power mechanism 6 to stop the power mechanism 6, so that the inner sleeve elevating actuator 5 also stops operating, and the elevating inner sleeve 2 does not rise any more. On the contrary, when the lifting inner sleeve 2 descends and the lower edge of the limit contact piece 32 descends to contact the inner sleeve descending limit position signal collector inductor 1021 of the inner sleeve descending limit position signal collector 102, the inner sleeve descending limit position signal collector 102 feeds back a signal to the PLC, the PLC gives an instruction to the power mechanism 6, the power mechanism 6 stops working, the inner sleeve lifting execution mechanism 5 also stops working, and the lifting inner sleeve 2 does not descend any more. In the above two cases, the former is understood as a state in which the roll 301 of the web (also referred to as "web cloth", hereinafter the same) on the web roll 30 shown in fig. 3 is in a full-roll state, and the latter is understood as a state in which the roll 301 of the web on the web roll 30 is in a used-up (exhausted) state.

In the actual use process, the lifting stroke of the lifting inner sleeve 2 is correspondingly different along with the different diameter specifications of the wool net roll 301, so that the position of the inner sleeve ascending limit position signal collector 42 on the upper adjusting groove 4111 can be changed together with the operation of the inner sleeve ascending limit position signal collector fixing screw 422, and the adjustment of the inner sleeve descending limit position signal collector fixing screw 1022 according to the requirement is the same as the above, and the description is not repeated. The stroke of the lifting inner sleeve 2 can be changed through the adjustment, and the up-down displacement stroke of the limit contact piece 32 is also changed correspondingly.

Continuing to refer to fig. 1 and 2, the inner sleeve lift actuator 5 includes a screw 51, a screw moving nut 52, a screw supporting bearing seat 53 and a screw moving nut guide sliding sleeve 54, the screw supporting bearing seat 53 is disposed at a central position corresponding to the outer sleeve end disc 14 at the lower portion of the outer sleeve cavity 12 of the outer sleeve 1 and fixed to the outer sleeve end disc 14 by a screw supporting bearing seat screw 531, the lower end of the screw 51 is rotatably supported on the screw supporting bearing seat 53 by a screw bearing 511, the lower end of the screw 51 extends below the screw supporting bearing seat 53 and is configured with a screw transmission connector 512, the upper end of the screw 51 is located in the outer sleeve cavity 12, the screw moving nut 52 is in threaded engagement with the screw 51 and the screw moving nut 52 is fixed to the lower end of the lift inner sleeve 2 by a screw moving nut fixing screw 521, and the screw moving nut guide sliding sleeve 54 is embedded in the screw moving nut 52 and the screw moving nut guide sliding sleeve 54 is fixed to the screw moving nut 52 The outer wall of the sliding sleeve 54 is in sliding fit with the cavity wall of the outer sleeve cavity 12, and the power mechanism 6 is in transmission connection with the screw transmission connector 512.

As shown in fig. 1 and 2, in order to limit the position of the screw bearing 511, a bearing plate 5111 is fixed to the lower portion of the screw bearing 511 by a bearing plate screw 51111, the bearing plate 5111 is in contact with the lower surface of the bearing seat expansion flange 532 of the screw bearing seat 531, and the upper surface of the bearing seat expansion flange 532 is in contact with the lower surface of the outer sleeve end plate 14. Further, a screw restricting nut 5121 is provided at the aforementioned screw drive coupling head 512 and at a position corresponding to the lower side of the bearing bracket 5111.

Continuing to refer to fig. 1 and 2, the aforementioned power mechanism 6 includes a motor 61, a reduction box 62, a coupling 63 and a reduction box support 64, the motor 61 is in transmission fit with the reduction box 62 and is fixed by the reduction box 62 through a reduction box fixing screw 621 together with the motor 61 and the middle downward end of the reduction box support 64, the final stage power output shaft of the reduction box 62 faces upward and extends to the upper side of the reduction box support 64, the coupling 63 is connected between the final stage power output shaft of the reduction box and the aforementioned screw transmission connector 512, the reduction box support 64 is U-shaped, and the upper parts of two sides of the reduction box support 64 are fixed with the downward side of the aforementioned outer sleeve end disc 14, specifically: the reduction gearbox bracket 64 is fixed at the position corresponding to the end disc fixing screw holes 641 preset at the upper parts of the two sides of the reduction gearbox bracket 64 by the outer sleeve end disc fixing screws 141; in the present embodiment, the motor 61 is a servo motor having a forward and reverse rotation function.

When the motor 61 works, the motor 61 drives the reduction box 62, the reduction box 62 reduces the speed and the final power output shaft of the reduction box drives the screw transmission connector 512 through the belt coupling joint 63, so that the screw 51 rotates, the screw moving nut 52 is driven to descend by the rotation of the screw 51, the screw moving nut 52 is fixed with the lower end of the lifting inner sleeve 2, so the lifting inner sleeve 2 is driven to descend correspondingly by the descending of the screw moving nut 52, at the moment, the wool net roller pressure sensing mechanism 8 arranged at the upper end of the lifting inner sleeve 2 descends correspondingly together with the wool net roller end supporting mechanism 7, and the wool net roller 30 supported on the wool net roller end supporting mechanism 7 also descends correspondingly. On the contrary, when the motor 61 is rotated in the forward and reverse directions or operated, the screw 51 is rotated in the reverse direction, and the inner sleeve 2 ascends. The limit of the ascending or descending is based on the limit contact 32 contacting the inner sleeve ascending limit position signal collector inductor 421 or the inner sleeve descending limit position signal collector inductor 1021.

Continuing with fig. 1 and 2, the aforementioned felt roller pressure sensing mechanism 8 includes a pressure sensor holder 81, a pressure sensor 82 and a roller holder connecting plate 83, the pressure sensor holder 81 is fixed to the inner sleeve support ring 221 by a pressure sensor holder screw 811 at a position above the inner sleeve support ring 221 at a position corresponding to the aforementioned pressure sensor holder screw hole 2212, and the pressure sensor fixing base 81 is formed with a pressure sensor chamber 812 (i.e., a pressure sensor accommodating chamber, the same applies hereinafter), the pressure sensor 82 is disposed immediately inside the pressure sensor chamber 812, one end of the roller base link plate 83 is formed with a link plate pivot pin boss 831, the link plate pivot pin sleeve 831 is pivotally connected to one end of the pressure sensor fixing base 81 by a link plate pivot pin 8311, the other end of the roller seat connecting plate 83 is a free end and is supported on the upper part of the pressure sensor 82; the above-mentioned end supporting mechanism 7 of the fleece roller is connected to the roller base connecting plate 83.

As shown in fig. 1, in order to prevent the connecting plate pivot pin 8311 from escaping from the pressure sensor fixing seat 81, a locking member 83111 is disposed at the end of the connecting plate pivot pin 8311, and the locking member 83111 may be a snap spring or a cotter pin, which is selected in this embodiment.

With continued reference to fig. 1 and 2, the aforementioned end supporting mechanism 7 for the wool net roll comprises a U-shaped frame 71, a first roller i 72, a second roller ii 73, a wool-rolling-roll-, the two ends of the first roller shaft I721 are respectively positioned on the pair of first roller shaft supporting seats I76, the two ends of the first roller shaft I721 are limited on the pair of first roller shaft supporting seats I76 by a pair of roller shaft first limiting plates I7211, the second roller II 73 is rotatably arranged in the middle of a second roller shaft II 731, the two ends of the second roller shaft II 731 are respectively positioned on the pair of second roller shaft supporting seats II 77, the two ends of the second roller shaft II 731 are limited on the pair of second roller shaft supporting seats II 77 by a pair of roller shaft second limiting plates II 7311, the front end of the roller plate 74 for limiting the roller shaft head side of the roller shaft is provided with a pair of roller plate adjusting grooves 741 which are parallel up and down, the roller plate adjusting and fixing screws 742 are arranged at positions corresponding to the pair of roller plate adjusting grooves 741, and the roller head side of the roller plate adjusting and fixing screws 742 are used for adjusting the roller head side of the roller 712 at positions corresponding to the roller plate adjusting and fixing screw holes 712 preset at the right end of the U-shaped frame 71 The surface limit roller plate 74 is adjustably connected to the right end of the U-shaped frame 71, the rear end of the side limit roller plate 74 of the lap shaft head is formed as a horizontal cantilever end, the lap shaft head side limit roller 75 is rotatably provided at the left end of the limit roller shaft 751, and the right end of the limit roller shaft 751 is fixed to the rear end of the lap shaft head side limit roller plate 74.

Continuing to refer to fig. 1 and 2, the inner sleeve lift guide limiting mechanism 9 includes an inner sleeve slide limiting block 91, a limiting block fitting plate 92 and a cover plate 93, the inner sleeve slide limiting block 91 is disposed on the outer sleeve 1 at a position corresponding to the inner sleeve lift guide limiting block cavity 15, and one side of the inner sleeve slide limiting block 91 facing the lift inner sleeve 2 contacts with the outer wall of the lift inner sleeve 2, the limiting block fitting plate 92 is fixed to the inner sleeve slide limiting block 91 through the cover plate 93, a limiting block access cavity 921 is disposed on the limiting block fitting plate 92 and at a position corresponding to the inner sleeve slide limiting block 91, and the inner sleeve slide limiting block 91 accesses the limiting block access cavity 921 and is defined by the cover plate 93. The method comprises the following steps: a cover plate fixing screw hole 18 is formed in the outer sleeve 1 at a position corresponding to the cover plate 93 (on both sides of the inner sleeve elevation guide stopper chamber 15), a pair of inner sleeve sliding limiting block fixing screw holes 911 are formed on the inner sleeve sliding limiting block 91, a pair of matching plate screw holes 922 are respectively arranged on the limiting block matching plate 92 and at the positions at the two sides of the limiting block probing cavity 921, a pair of stopper limiting screws 931 (also referred to as stopper fixing screws) are provided on the cover plate 93 at positions corresponding to the inner sleeve slide stopper fixing screw holes 911 and mating plate fixing screws 932 are provided at positions corresponding to the mating plate screw holes 922, the stopper limiting screws 931 are screwed into the inner sleeve slide stopper fixing screw holes 911, and mating plate set screws 932 are threaded through mating plate screw holes 922 and into the previously described cover plate set screw holes 18.

Referring to fig. 3 to 4 in combination with fig. 1 and 2, the outer sleeve embracing fixing device 11 includes an upper fixing arm 111, a lower fixing arm 112 and a fixing arm connecting rod 113, wherein an upper outer sleeve fitting hoop 1111 is fixed at one end of the upper fixing arm 111 facing the outer sleeve 1, the upper outer sleeve fitting hoop 1111 is fixed on the outer sleeve at a position corresponding to the lower part of the outer sleeve fixing sleeve 16 and is engaged with the outer sleeve 1 by the fixing sleeve screw 1611 and is fixed with the outer sleeve fixing sleeve 16, the other end of the upper fixing arm 111 is fixed with the base of the needling machine 20 in a use state, a pair of lower outer sleeve fitting hoops 1121 is fixed at one end of the lower fixing arm 112 facing the outer sleeve 1, the lower outer sleeve fitting hoop 1121 is embracing with the outer sleeve 1 at a position corresponding to the upper part of the outer sleeve end plate 14 and is fixed with an outer sleeve hoop fixing screw hole 19 (shown in fig. 1) preset on the outer sleeve 1, the other end of the lower fixing arm 112 is fixed to the needling machine 20 in the use state, and a fixing arm connecting rod 113 is connected between the upper fixing arm 111 and one end (front end in the position state shown in fig. 3 and 4) of the lower fixing arm 112 facing the outer sleeve 1.

Since the needle loom 20 shown in fig. 3 and the mechanism of action, i.e. the working principle, belong to the prior art and can be referred to the patent documents mentioned by the applicant in the above background art column (but not limited to the mentioned patent documents), the applicant is not repeated.

As can be seen from the state shown in fig. 3 and in combination with the common knowledge in the art, the present application is provided with a pair of needle loom 20 for supporting both ends of the fleece roller 30 simultaneously.

When the base fabric 40 shown in fig. 3 is advanced toward the next needling machine toward the front of the position shown in fig. 3, the web roll 301 is withdrawn from the web roll 30, i.e., the web cloth is withdrawn from the web roll 301, so as to enter the next needling machine in a state of being attached to the base fabric 40.

In the state where the web roll 301 is unwound, the power mechanism 6 operates the inner sleeve lifting/lowering actuator 5 to slowly move the lifting inner sleeve 2 downward as described above by the applicant, and the web roll pressure sensing mechanism 8 and the web roll end supporting mechanism 7 also move downward accordingly. As the diameter of the fleece roll 301 on the fleece roll 30 decreases, the load bearing capacity of the fleece roll 30 decreases accordingly, indicating that more fleece fabric exits the fleece roll 301, which is sensed by the pressure sensor 82 and fed back to the PLC. Specifically, when the exiting amount of the net cloth on the net roll 301 is increased, that is, the diameter of the net cloth is gradually decreased, the lower the weight of the net cloth is, the lower the inner sleeve 2 is, the lower the inner sleeve is, so as to ensure that the net cloth is engaged with the base cloth 40 with the same pressure.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims (10)

1. A constant pressure device for a lap of a papermaking felt needling combination machine is characterized by comprising an outer sleeve (1), wherein the outer sleeve (1) is fixed with a needling machine (20) through an outer sleeve embracing and fixing device (11) in a use state, and a limiting contact piece fixing bolt sliding groove (13) used for communicating an outer sleeve cavity (12) of the outer sleeve (1) with the outside is formed in a longitudinal state on a wall body of the outer sleeve (1); the lifting inner sleeve (2) is in sliding fit with the outer sleeve cavity (12) in a vertically moving mode, and a limiting block sliding fit groove (21) is formed in the outer wall of the lifting inner sleeve (2) in a longitudinal state; an inner sleeve lifting limit position signal triggering mechanism (3), an inner sleeve lifting upper limit position signal collecting mechanism (4) and an inner sleeve lifting lower limit position signal collecting mechanism (10), wherein the inner sleeve lifting limit position signal triggering mechanism (3) is fixed with the lower end of the lifting inner sleeve (2) at a position corresponding to the limiting contact fixing bolt sliding groove (13), the inner sleeve lifting upper limit position signal collecting mechanism (4) is fixed with the outer wall of the outer sleeve (1) at a position corresponding to the upper part of the inner sleeve lifting limit position signal triggering mechanism (3), and the inner sleeve lifting lower limit position signal collecting mechanism (10) is also fixed with the outer wall of the outer sleeve (1) at a position corresponding to the lower part of the inner sleeve lifting limit position signal triggering mechanism (3); an inner sleeve lifting actuator (5), wherein the inner sleeve lifting actuator (5) is arranged in the outer sleeve cavity (12) and is connected with the lower end of the lifting inner sleeve (2); the power mechanism (6) is used for enabling the inner sleeve lifting executing mechanism (5) to work, and the power mechanism (6) is fixed with the lower end of the outer sleeve (1) and is in transmission connection with the inner sleeve lifting executing mechanism (5); a wool net roller end supporting mechanism (7) and a wool net roller pressure sensing mechanism (8), the wool net roller pressure sensing mechanism (8) is arranged at the top of the lifting inner sleeve (2), and the wool net roller end supporting mechanism (7) is arranged above the wool net roller pressure sensing mechanism (8).

2. The felt needling combination lap constant pressure device according to claim 1, characterized in that an outer sleeve end disc (14) is fixed at a position corresponding to the lower end face of the outer sleeve (1), an inner sleeve lifting guide limit block cavity (15) for communicating the outer sleeve cavity (12) with the outside is opened at the upper end of the outer sleeve (1), an inner sleeve lifting guide limit mechanism (9) is provided at a position corresponding to the inner sleeve lifting guide limit block cavity (15), the inner sleeve lifting guide limit mechanism (9) is in contact with the outer wall of the lifting inner sleeve (2), and a fixed sleeve (16) is fixed on the outer wall of the outer sleeve (1) and below the inner sleeve lifting guide limit mechanism (9) around the periphery of the outer wall of the outer sleeve (1); the power mechanism (6) used for enabling the inner sleeve lifting actuating mechanism (5) to work is fixed with the outer sleeve end disc (14) at a position corresponding to the lower part of the outer sleeve end disc (14); an inner sleeve supporting ring (221) is fixed at the upper end of the lifting inner sleeve (2) and positioned in a lifting inner sleeve cavity (22) of the lifting inner sleeve (2), and the upper surface of the inner sleeve supporting ring (221) is flush with the upper surface of the lifting inner sleeve (2); the wool net roller pressure sensing mechanism (8) and the wool net roller end supporting mechanism (7) are fixed on the upper surface of the inner sleeve supporting ring (221); the upper part of the outer sleeve embracing fixing device (11) is fixed with the outer sleeve fixing sleeve (16), and the lower part of the outer sleeve embracing fixing device (11) is embracing fixed with the outer sleeve (1) at a position corresponding to the upper part of the outer sleeve end disc (14).

3. The felt needling combination lap constant pressure device according to claim 1 or 2, characterized in that the outer wall of the upper end of the outer sleeve (1) is sleeved with an inner sleeve guide and slide sleeve fixing ring (17), inner sleeve guide and slide sleeve fixing screw holes (171) are arranged around the inner sleeve guide and slide sleeve fixing ring (17) at intervals, inner sleeve guide and slide sleeve fixing screws (1711) are arranged at the positions corresponding to the inner sleeve guide and slide sleeve fixing screw holes (171), an inner sleeve guide and slide sleeve (172) is embedded at the positions corresponding to the upper part of the inner sleeve guide and slide sleeve fixing ring (17), the outer wall of the lifting inner sleeve (2) is in sliding fit with the inner wall of the inner sleeve guide and slide sleeve (172), and the inner sleeve guide and slide sleeve fixing screws (1711) are screwed to the inner sleeve guide and slide sleeve (172).

4. The constant pressure device for the wool lap of the felt needling loom of the paper machine according to claim 1, characterized in that the inner sleeve lifting limit position signal trigger mechanism (3) comprises a limit contact piece fixing bolt (31) and a limit contact piece (32), one end of the limit contact piece fixing bolt (31) facing the outer sleeve cavity (12) is inserted into the outer sleeve cavity (12) at a position corresponding to the limit contact piece fixing bolt sliding groove (13) and is fixed with the lower end of the lifting inner sleeve (2), one end of the limiting contact piece fixing bolt (31) departing from the outer sleeve cavity (12) extends out of the outer sleeve cavity (12) and is formed into a limiting contact piece fixing end, and a limiting contact piece (32) is fixed at the limiting contact piece fixing end and corresponds to a position between the inner sleeve lifting upper limiting position signal acquisition mechanism (4) and the inner sleeve lifting lower limiting position signal acquisition mechanism (10); the number of the limit contact fixing bolts (31) is a pair which is corresponding to each other up and down.

5. The felt needling combination lap constant pressure device according to claim 4, wherein the inner sleeve ascending and descending upper limit position signal collecting mechanism (4) comprises an inner sleeve ascending limit position signal collector bracket (41) and an inner sleeve ascending limit position signal collector (42), one end of the inner sleeve ascending limit position signal collector bracket (41) facing the outer sleeve (1) is fixed with the outer wall of the outer sleeve (1) at a position corresponding to the upper part of the limit contact fixing bolt (31), one end of the inner sleeve ascending limit position signal collector bracket (41) far away from the outer sleeve (1) is folded and unfolded with an inner sleeve ascending limit position signal collector bracket folding edge (411), and a pair of upper adjusting grooves (4111) which are parallel to each other are arranged on the inner sleeve ascending limit position signal collector bracket folding edge (411) in a longitudinal state, an inner sleeve ascending limit position signal collector (42) is fixed with an inner sleeve ascending limit position signal collector bracket folding edge (411) in an up-down adjusting mode at a position corresponding to a pair of upper adjusting grooves (4111) through a pair of inner sleeve ascending limit position signal collector fixing screws (422), and an inner sleeve ascending limit position signal collector inductor (421) of the inner sleeve ascending limit position signal collector (42) corresponds to the upper part of the limit contact piece (32); inner skleeve lift lower extreme position signal acquisition mechanism (10) includes the lower extreme position signal collector support of an inner skleeve (101) and the lower extreme position signal collector of an inner skleeve (102), and the lower extreme position signal collector support of inner skleeve (101) orientation the one end of outer skleeve (1) is in the position corresponding to the below of spacing contact fixing bolt (31) with the outer wall of outer skleeve (1) is fixed, and the one end that outer skleeve (1) was kept away from to the lower extreme position signal collector support hem (1011) of inner skleeve (101) has the lower extreme position signal collector support hem (1011) of an inner skleeve to set up a pair of parallel lower adjustment tank (10111) with longitudinal condition on this lower extreme position signal collector support hem (1011) of inner skleeve, lower extreme position signal collector (102) of inner skleeve are corresponding to a pair of lower adjustment tank (1022) through a pair of lower extreme position signal collector fixing screw (1022) of inner skleeve The position of the whole groove (10111) is adjusted up and down and is fixed with a folding edge (1011) of a bracket of the inner sleeve descending limit position signal collector, and an inductor (1021) of the inner sleeve descending limit position signal collector (102) corresponds to the lower part of the limit contact piece (32); the limiting contact piece (32) is acted with an inner sleeve ascending limit position signal collector inductor (421) of an inner sleeve ascending limit position signal collector (42) or acted with an inner sleeve descending limit position signal collector inductor (1021) of an inner sleeve descending limit position signal collector (102); the inner sleeve ascending limit position signal collector (42) and the inner sleeve descending limit position signal collector (102) are microswitches, travel switches, position proximity switches, reed pipes or Hall sensing elements.

6. The felt needling combination lap constant pressure device according to claim 2, wherein the inner sleeve lifting actuator (5) comprises a screw (51), a screw moving nut (52), a screw supporting bearing seat (53) and a screw moving nut guiding sliding sleeve (54), the screw supporting bearing seat (53) is arranged at the lower part of the outer sleeve cavity (12) of the outer sleeve (1) at the central position corresponding to the outer sleeve end disc (14) and is fixed with the outer sleeve end disc (14) through a screw supporting bearing seat screw (531), the lower end of the screw (51) is rotatably supported on the screw supporting bearing seat (53) through a screw bearing (511), the lower end of the screw (51) extends to the lower part of the screw supporting bearing seat (53) and is formed with a screw driving connector (512), the upper end of the screw (51) is positioned in the outer sleeve cavity (12), the screw moving nut (52) is in threaded fit with the screw (51), the screw moving nut (52) is fixed with the lower end of the lifting inner sleeve (2) through a screw moving nut fixing screw (521), the screw moving nut guide sliding sleeve (54) is embedded on the screw moving nut (52), the outer wall of the screw moving nut guide sliding sleeve (54) is in sliding fit with the cavity wall of the outer sleeve cavity (12), and the power mechanism (6) is in transmission connection with the screw transmission connecting head (512).

7. The felt needling combination lap constant pressure device as claimed in claim 6, characterized in that the power mechanism (6) comprises a motor (61), a reduction gearbox (62), a coupling (63) and a reduction gearbox support (64), the motor (61) is in transmission fit with the reduction gearbox (62) and is fixed by the reduction gearbox (62) together with the motor (61) and the downward end of the middle part of the reduction gearbox support (64), the final power output shaft of the reduction gearbox (62) extends above the reduction gearbox support (64), the coupling (63) is connected between the final power output shaft of the reduction gearbox and the screw transmission connector (512), the reduction gearbox support (64) is U-shaped, and the upper parts of the two sides of the reduction gearbox support (64) are fixed with the downward side of the outer sleeve end disc (14); the motor (61) is a servo motor with a forward and reverse rotation function.

8. The felt needling combination lap constant pressure device according to claim 2, wherein the felt roll pressure sensing mechanism (8) comprises a pressure sensor holder (81), a pressure sensor (82) and a roller holder connecting plate (83), the pressure sensor holder (81) is fixed to the inner sleeve support ring (221) by a pressure sensor holder screw (811) at a position corresponding to the upper side of the inner sleeve support ring (221), and the pressure sensor holder (81) is formed with a pressure sensor cavity (812), the pressure sensor (82) is disposed in the pressure sensor cavity (812), one end of the roller holder connecting plate (83) is formed with a connecting plate pivot pin boss (831), the connecting plate pivot pin boss (831) is pivotally connected to one end of the pressure sensor holder (81) by a connecting plate pivot pin (8311), the other end of the roller seat connecting plate (83) is a free end and is supported on the upper part of the pressure sensor (82); the end part supporting mechanism (7) of the wool net roller is connected with a roller seat connecting plate (83).

9. The felt needling combination lap pressure device according to claim 8, characterized in that the lap roll end support mechanism (7) comprises a U-shaped frame (71), a first roll I (72), a second roll II (73), a lap roll axial side limit roll plate (74), a lap roll axial side limit roll (75), a pair of first roll bearing blocks I (76) and a pair of second roll bearing blocks II (77), the U-shaped frame (71) being located above the roll base connection plate (83) and fixed to the roll base connection plate (83) by U-shaped frame fixing screws (711), the pair of first roll bearing blocks I (76) being fixed to the left end of the U-shaped frame cavity of the U-shaped frame (71) in a front-to-back correspondence with each other, the pair of second roll bearing blocks II (77) being fixed to the right end of the U-shaped frame cavity of the U-shaped frame (71) in a front-to-back correspondence with each other, the first roller I (72) is rotatably arranged in the middle of a first roller shaft I (721), two ends of the first roller shaft I (721) are respectively positioned on the pair of first roller shaft supporting seats I (76), the second roller II (73) is rotatably arranged in the middle of a second roller shaft II (731), two ends of the second roller shaft II (731) are respectively positioned on the pair of second roller shaft supporting seats II (77), the front end of a wool roller shaft head side limiting roller plate (74) is in adjusting connection with the right end of the U-shaped frame (71), the rear end of the wool roller shaft head side limiting roller plate (74) is formed into a horizontal cantilever end, the wool roller shaft head side limiting roller (75) is rotatably arranged at the left end of the limiting roller shaft (751), and the right end of the limiting roller shaft (751) is fixed with the rear end of the wool roller shaft head side limiting roller plate (74).

10. The felt needling combination lap constant pressure device according to claim 2, characterized in that the inner sleeve lift guide limit mechanism (9) comprises an inner sleeve slide limit block (91), a limit block mating plate (92) and a cover plate (93), the inner sleeve slide limit block (91) is provided on the outer sleeve (1) at a position corresponding to the inner sleeve lift guide limit block cavity (15) and one side of the inner sleeve slide limit block (91) facing the lift inner sleeve (2) is in contact with the outer wall of the lift inner sleeve (2), the limit block mating plate (92) is fixed with the inner sleeve slide limit block (91) through the cover plate (93), a limiting block access cavity (921) is arranged on the limiting block matching plate (92) and at a position corresponding to the inner sleeve sliding limiting block (91), and the inner sleeve sliding limiting block (91) accesses into the limiting block access cavity (921) and is limited by the cover plate (93); the outer sleeve embracing fixing device (11) comprises an upper fixing arm (111), a lower fixing arm (112) and a fixing arm connecting rod (113), wherein one end of the upper fixing arm (111) facing the outer sleeve (1) is fixed with an outer sleeve upper matching hoop (1111), the outer sleeve upper matching hoop (1111) is matched with the outer sleeve (1) at a position corresponding to the lower part of the outer sleeve fixing sleeve (16) and is fixed with the outer sleeve fixing sleeve (16), the other end of the upper fixing arm (111) is fixed with the needling machine (20) in a use state, one end of the lower fixing arm (112) facing the outer sleeve (1) is fixed with a pair of outer sleeve lower matching hoops (1121), the outer sleeve lower matching hoop (1121) is embracing with the outer sleeve (1) at a position corresponding to the upper part of the outer sleeve end plate (14) and is fixed with the outer sleeve (1), the other end of the lower fixing arm (112) is fixed with the needle machine (20) in a use state, and a fixing arm connecting rod (113) is connected between the upper fixing arm (111) and one end of the lower fixing arm (112) facing the outer sleeve (1).

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