CN213117339U

CN213117339U - Screw thread stop device

Info

Publication number: CN213117339U
Application number: CN202022098610.3U
Authority: CN
Inventors: 陈国良; 郑建平; 蒲胤谷; 宋昌贵; 黄运航
Original assignee: Hangzhou Qiangben Plastic Technology Co ltd
Current assignee: Hangzhou Qiangben Plastic Technology Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-05-04
Anticipated expiration: 2030-09-23

Abstract

The utility model relates to a thread stop device, which comprises an elastic reset positioning component, a driving shaft, a screw rod and a thread sleeve screwed with the screw rod; a main transmission part is arranged on the driving shaft, a driven part matched with the main transmission part is arranged on the screw rod, and the driven part is coaxially and rotatably matched with the screw rod; the device is characterized in that at least one limit groove matched with the elastic reset positioning component is arranged on the screw rod, the elastic reset positioning component is inserted into the limit groove through resetting to realize the locking positioning of the driven part, compared with the prior art, the device does not need to position through parts such as a stepping motor and a limit switch, the part cost is saved, the structure is simple, the manufacturing cost is low, a control system is not needed, the device does not need to be debugged during installation, the assembly time is short, and the maintenance difficulty is low.

Description

Screw thread stop device

Technical Field

The utility model relates to a machine-building technical field, concretely relates to screw thread end position device.

Background

At present, the thread hank tooth is according to the big or small design chain wheel commentaries on classics tooth of chain wheel gear, and the chain wheel is changeed the tooth and is all according to pressure disk size design angle, current screw rod or screw drive structure driving piece each time drive pressure disk or screw rod rotate and can't carry out accurate location, can only realize the location of pressure disk through step motor or limit switch, these two kinds of modes can realize better location effect, but there is the problem with high costs, not only the purchasing cost of part is high, still embody on the human cost of equipment debugging, need additionally increase control system, software still needs to be purchased, for the enterprise on the foot increased a big expense, consequently, the very much need a structure complexity is low, and cost of fabrication and the low thread stop device of debugging cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that exists among the prior art, provide a structure complexity is low, and the cost is with the low screw thread stop device of debugging cost.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a thread stop device comprises an elastic reset positioning component, a driving shaft, a screw rod and a thread sleeve in threaded connection with the screw rod; a main transmission part is arranged on the driving shaft, a driven part matched with the main transmission part is arranged on the screw rod, and the driven part is coaxially and rotatably matched with the screw rod; the screw rod is at least provided with a limiting groove matched with the elastic reset positioning component, and the elastic reset positioning component is inserted into the limiting groove through resetting to realize the locking positioning of the driven part.

The working principle and the beneficial effects are as follows: when a driving shaft is driven to rotate by a stepping motor or other transmission equipment, the driving shaft drives a main transmission part to rotate, the main transmission part drives a driven part to rotate, the driven part drives a screw rod to rotate, when the screw rod can only do rotary motion, a threaded sleeve screwed with the screw rod can move up and down along the length direction of the screw rod, when a limiting groove on the screw rod rotates to the position of an elastic resetting positioning component, the elastic resetting positioning component is inserted into the limiting groove through resetting to realize the locking of the driven part, at the moment, the screw rod stops rotating, the threaded sleeve also stops moving, the positioning of the threaded sleeve is realized at the moment, the locking positioning of the driven part is also equivalent to the locking positioning of the threaded sleeve, wherein the threaded sleeve is generally arranged on other moving parts through screws, and the accurate positioning of the moving parts can be realized through the arrangement; compared with the prior art that the device adopts the mode of positioning by the stepping motor and the limit switch, the device not only saves the cost of the high-precision positioning parts, but also can adopt the common stepping motor, does not need the sensors such as the limit switch and the like, does not need a control system, does not need software control, effectively saves the debugging time after the equipment is installed, can be put into production immediately after the equipment is installed, and effectively improves the production efficiency; compared with the existing equipment, the device has the advantages that the structure is simpler, the number of parts is small, and no electronic equipment is provided, so that the equipment is more stable in operation, longer in service life, less prone to problems, simpler in assembly and disassembly and lower in maintenance cost; compared with an electronic or software algorithm positioning mode, algorithm errors basically do not exist, and only mechanical errors exist, so that the positioning precision is higher; the positioning device is applicable to various complex working conditions, such as high-temperature, high-corrosion and high-humidity environments, and is more durable, more stable and more reliable than the conventional electronic equipment positioning mode.

Furthermore, the elastic reset positioning assembly comprises a limiting fixing block, a limiting rod and an elastic reset piece arranged between the fixing block and the limiting rod, wherein the elastic reset piece resets to push the limiting rod to move towards the screw rod direction, so that the elastic reset piece is inserted into the limiting groove to realize the locking positioning of the driven piece.

Furthermore, the spacing groove is including the portion of sliding into and spacing portion, the portion of sliding into and spacing portion are located the both ends of spacing groove respectively, the gag lever post enters into spacing portion position and spacing portion butt from the portion of sliding into and realizes the locking location of follower.

Furthermore, the width of the limiting groove is larger than or equal to the outer diameter of the limiting rod.

Furthermore, the transmission mode between the main transmission part and the driven part is one of gear transmission, belt transmission, chain transmission and rolling transmission.

Further, be equipped with on the spacing fixed block and supply elasticity to reset an male mounting groove, elasticity resets an one end butt mounting groove inner wall, other end butt gag lever post.

Furthermore, the cooperation is inhaled to interference fit or magnetism between elasticity piece and the mounting groove that resets, the cooperation is inhaled to magnetism between elasticity piece and the gag lever post that resets.

Furthermore, an arc-shaped flange matched with the limiting rod is arranged on the limiting part.

Furthermore, the top of the limiting rod is provided with a spherical part.

Furthermore, the number of the limiting grooves is two.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is an isometric cross-sectional view of the present invention.

In the figure, 1, an elastic reset positioning component; 2. a drive shaft; 3. a screw; 4. a threaded sleeve; 5. a driving gear; 6. a driven gear; 7. forming a tooth shaft; 8. a limiting groove; 11. a limit fixing block; 12. a limiting rod; 13. an elastic reset member; 41. a waist hole; 81. a slide-in part; 82. a limiting part; 111. mounting grooves; 121. a spherical portion; 821. an arc-shaped flange.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

As shown in fig. 1-2, the thread stop device includes an elastic reset positioning assembly 1, a driving shaft 2, a screw rod 3 and a thread bushing 4 screwed with the screw rod 3, in this embodiment, the driving shaft 2 and the screw rod 3 are arranged in parallel, the thread bushing 4 is provided with a plurality of waist holes 41 for fixing on other devices or moving parts, the thread bushing 4 is fixed on other parts needing linear motion through screws, of course, the thread bushing 4 may be fixed, the screw rod 3 moves up and down and rotates, in short, the two parts can move up and down relatively, the driving shaft 2 is connected with a stepper motor through a common coupling, and the driving shaft 2 is driven to rotate through the stepper motor or motors of other types.

Specifically, a main transmission part is arranged on the driving shaft 2, a driven part matched with the main transmission part is arranged on the screw rod 3, the driven part and the screw rod 3 are coaxially and rotatably matched, preferably, the transmission mode between the main transmission part and the driven part is one of gear transmission, belt transmission, chain transmission and rolling transmission, the transmission mode can be various, in the embodiment, the transmission efficiency is high, and the most conventional gear transmission mode is adopted, wherein the driving gear 5 is fixedly arranged on the driving shaft 2 through a screw, the driven gear 6 is arranged on the screw rod 3 through a screw, a forming tooth shaft 7 is also arranged between the screw rod 3 and the driven gear 6, the forming tooth shaft 7 is used for fixing the driven gear 6, and the forming tooth shaft 7 and the screw rod 3 are integrated or screwed and fixed and can also be fixed through a screw;

specifically, be equipped with one at least on the screw rod 3 with the spacing groove 8 of the 1 complex of elasticity locating component that resets, elasticity locating component 1 that resets inserts the locking location that realizes the follower in spacing groove 8 through resetting, and wherein in this embodiment, spacing groove 8 sets up on the periphery of shaping dental axis 7, and this setting need not to process on establishing screwed screw rod 3, can not destroy the intensity of screw rod 3, has also reduced the processing degree of difficulty.

As shown in fig. 3, specifically, the elastic reset positioning assembly 1 includes a limit fixing block 11, a limiting rod 12 and an elastic reset piece 13 disposed between the fixing block and the limiting rod 12, where the elastic reset piece 13 resets to push the limiting rod 12 to move toward the screw 3, so as to be inserted into the limiting groove 8 to achieve the locking and positioning of the driven piece. Wherein, the elastic reset piece 13 is a common elastic column made of carbon steel spring or other materials, in this embodiment, a carbon steel compression spring is selected, the limit fixing block 11 is fixed on other parts by screws, under normal condition, the compression spring is in a compressed state, the forming tooth shaft 7 is driven by the screw rod 3 to rotate, the thread sleeve 4 is selected to be fixed, then the forming tooth shaft 7 can only rotate and moves up and down along with the screw rod 3 in the length direction of the screw rod 3, in this process, the limit rod 12 is always abutted on the surface of the forming tooth shaft 7, when the limit groove 8 rotates to the position of the limit rod 12, the compression spring resets to push the limit rod 12 into the limit groove 8, at this time, the forming tooth shaft 7, the driven piece and the screw rod 3 can not rotate continuously, at this time, the positioning effect is realized, by this mechanical positioning mode, the method has the advantages that the position is calculated only during design, only machining errors exist, the machining precision is high, algorithm errors do not exist in the method of comparing through electronic equipment, the positioning precision can be effectively improved, and the method is more stable and reliable and low in failure rate.

Specifically, the limiting groove 8 comprises a sliding-in portion 81 and a limiting portion 82, the sliding-in portion 81 and the limiting portion 82 are located at two ends of the limiting groove 8 respectively, and the limiting rod 12 enters the limiting portion 82 from the sliding-in portion 81 and abuts against the limiting portion 82 to achieve stopping and positioning of the driven piece. With the arrangement, when the limiting rod 12 slides in from the slide-in part 81 and moves to the limiting part 82, the driven part is stopped and positioned, and the structure is simple, stable and reliable.

Preferably, the width of the limiting groove 8 is larger than or equal to the outer diameter of the limiting rod 12. Due to the arrangement, the limiting rod 12 can slide into and out of the limiting groove 8 more smoothly, the clamping cannot be carried out, and the abrasion of the limiting rod 12 is reduced.

Specifically, be equipped with on the spacing fixed block 11 and supply elasticity piece 13 male mounting groove 111 that resets, elasticity piece 13 one end butt mounting groove 111 inner wall that resets, other end butt gag lever post 12. This setting can conveniently be installed elasticity piece 13 that resets on spacing fixed block 11, and the assembly degree of difficulty is low.

Specifically, interference fit or magnetic attraction fit between the elastic reset piece 13 and the mounting groove 111, and magnetic attraction fit between the elastic reset piece 13 and the limiting rod 12. Above-mentioned setting, all can prevent falling out of elasticity piece 13 that resets, in this embodiment, mounting groove 111 and elasticity piece 13 that resets choose interference fit's mode for use, and elasticity piece 13 and gag lever post 12 that resets choose for use the mode of magnetism to inhale, and elasticity piece 13 that resets is carbon steel spring, installation magnet or magnetic sheet on gag lever post 12, or gag lever post 12 makes through magnetic material, and certainly can also fix through modes such as glue or screw between elasticity piece 13 and the gag lever post 12 that resets.

Specifically, an arc-shaped rib 821 matched with the limiting rod 12 is arranged on the limiting part 82. This setting, when gag lever post 12 and arc flange 821 butt, arc flange 821 can block owner gag lever post 12 better for gag lever post 12 can not continue to take place the displacement, thereby reduces the error.

Specifically, the top of the limiting rod 12 is provided with a spherical part 121. With the arrangement, the spherical portion 121 is shaped to reduce the contact area with the forming tooth shaft 7, thereby reducing the friction force and reducing the abrasion of the stopper rod 12 and the forming tooth shaft 7.

Preferably, can set up the one deck flexible buffer layer in arc flange 821 position, for example the one deck that materials such as silica gel made, the noise that produces when can reducing gag lever post 12 and arc flange 821 striking reduces damage between them, when gag lever post 12 tightly pushed down the flexible buffer layer simultaneously, the thickness when only needing to compress the flexible buffer layer calculates into when the design, when doing the surplus, just can not exert an influence to the positioning accuracy of this device.

Specifically, the number of the limiting grooves 8 is two. The two limiting grooves 8 which are opposite in direction and located at different heights are adopted, so that the up-and-down movement stroke of the screw rod 3 or the threaded sleeve 4 can be positioned.

The part of the utility model which is not described in detail is the prior art, so the utility model does not detail the part.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Although the terms of the elastic reset positioning assembly 1, the driving shaft 2, the screw 3, the threaded sleeve 4, the driving gear 5, the driven gear 6, the forming threaded shaft 7, the limiting groove 8, the limiting fixing block 11, the limiting rod 12, the elastic reset piece 13, the waist hole 41, the sliding-in portion 81, the limiting portion 82, the mounting groove 111, the spherical portion 121, the arc-shaped rib 821 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims

1. A thread stop device is characterized by comprising an elastic reset positioning component, a driving shaft, a screw rod and a thread sleeve in threaded connection with the screw rod; a main transmission part is arranged on the driving shaft, a driven part matched with the main transmission part is arranged on the screw rod, and the driven part is coaxially and rotatably matched with the screw rod; the screw rod is at least provided with a limiting groove matched with the elastic reset positioning component, and the elastic reset positioning component is inserted into the limiting groove through resetting to realize the locking positioning of the driven part.

2. The thread stop device according to claim 1, wherein the elastic reset positioning assembly comprises a limit fixing block, a limit rod and an elastic reset element arranged between the fixing block and the limit rod, and the elastic reset element resets to push the limit rod to move towards the screw rod, so that the limit rod is inserted into the limit groove to stop and position the driven element.

3. The threaded stop device according to claim 2, wherein the limiting groove comprises a sliding-in portion and a limiting portion, the sliding-in portion and the limiting portion are respectively located at two ends of the limiting groove, and the limiting rod enters the limiting portion from the sliding-in portion to abut against the limiting portion to achieve stop positioning of the driven member.

4. The thread stop device according to claim 2, wherein the width of the limit groove is greater than or equal to the outer diameter of the limit rod.

5. A thread stop device according to claim 1, wherein the transmission between the driving member and the driven member is one of a gear transmission, a belt transmission, a chain transmission and a rolling transmission.

6. The threaded stop device according to claim 2, wherein the limit fixing block is provided with a mounting groove into which the elastic reset member is inserted, one end of the elastic reset member abuts against an inner wall of the mounting groove, and the other end of the elastic reset member abuts against the limit rod.

7. The threaded stop device according to claim 6, wherein the elastic return member is in interference fit or magnetic attraction fit with the mounting groove, and the elastic return member is in magnetic attraction fit with the limiting rod.

8. A threaded stop device according to claim 3, wherein the stop portion is provided with an arc-shaped rib which is engaged with the stop rod.

9. The threaded stop device of claim 2, wherein the top of the stop rod is provided with a spherical portion.

10. A thread stop device according to any one of claims 1 to 9, wherein the number of the limiting grooves is two.