CN114110389A - Fork truck traveles and controls characteristic test device - Google Patents
Fork truck traveles and controls characteristic test device Download PDFInfo
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- CN114110389A CN114110389A CN202111444227.1A CN202111444227A CN114110389A CN 114110389 A CN114110389 A CN 114110389A CN 202111444227 A CN202111444227 A CN 202111444227A CN 114110389 A CN114110389 A CN 114110389A
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 31
- 230000000149 penetrating effect Effects 0.000 claims description 16
- 230000010354 integration Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 5
- 230000001133 acceleration Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
- F16M13/022—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle repositionable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07504—Accessories, e.g. for towing, charging, locking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- General Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Acoustics & Sound (AREA)
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- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a forklift running control characteristic testing device, which comprises a data acquisition device and a connection input device, wherein the data acquisition device comprises a speed reducer and an encoder connected to one side end part of the speed reducer; the device also comprises a clamping and supporting device which is connected with the speed reducer and flexibly supported, and the upper end of the clamping and supporting device is clamped and fixed on the mudguard above the center of the wheel. Data are acquired through a high-precision high-response-frequency encoder, vehicle running data including vehicle response time, speed, acceleration and the like are obtained through calculation and conversion of the acquired data, the condition of vehicle response delay caused by factors such as gear clearance in a transmission system can be avoided, the vehicle running condition can be monitored in real time, and the overall operation and control characteristics of the forklift can be better reflected.
Description
Technical Field
The application relates to the technical field of forklift performance detection, in particular to a forklift running control characteristic testing device.
Background
The driving controllability of the forklift, namely the difficulty of controlling the driving intention of the forklift, is an important factor for measuring the overall performance of the forklift. At present, in the automobile industry, the research on the operation stability of automobiles is widely carried out, but the operation performance of the forklift serving as special equipment is rarely researched, and related research reports are rarely found. Therefore, it is necessary to conduct a test study on the entire vehicle handling performance of the forklift. The research on the operation performance of the forklift is mainly carried out from the aspects of the action response time, the speed, the acceleration, the impact degree and the like of the forklift. The vehicle parameters CAN be acquired by a vehicle CAN line connection data receiving device, but because factors such as gear meshing clearance accumulated error in a vehicle reduction box, CAN bus data delay and the like exist, the data acquired by the method is different from an actual result. In addition, in the actual test process, the test data acquired through the CAN bus is less, so that the research on the whole vehicle maneuverability of the forklift is not well supported, and a certain error is brought to the objective evaluation on the whole vehicle maneuverability of the forklift. Therefore, the forklift driving control characteristic testing device is provided.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present patent application aims to provide a device for testing the driving control characteristics of a forklift, which solves the above-mentioned problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a forklift running control characteristic testing device comprises a data acquisition device and a connection input device, wherein the data acquisition device comprises a speed reducer and an encoder connected to one side end part of the speed reducer;
the device also comprises a clamping and supporting device which is connected with the speed reducer and flexibly supported, and the upper end of the clamping and supporting device is clamped and fixed on the mudguard above the center of the wheel.
Further, centre gripping strutting arrangement is including fixing the lower free bearing at the speed reducer up end, and the one end of first connecting rod is connected to the upper end of lower free bearing, and the one end of second connecting rod is connected to the other end of first connecting rod, and the other end of second connecting rod rotates and is connected with the free bearing, goes up and installs splint on the free bearing, and splint pass through first bolt fixed connection on the fender of wheel center top.
Furthermore, go up the free bearing and include a disc, set up a plurality of first round holes that are equidistance annular distribution on the disc, the disc passes first round hole locking on the lateral wall of splint through the second bolt.
Furthermore, the upper hinge base further comprises a cylinder connected to the side wall of the disc, a through hole is formed in the cylinder in the radial direction, a penetrating rod with two ends extending outwards is inserted in the through hole, the second connecting rod is movably inserted in the penetrating rod, and one end, far away from the disc, of the cylinder is locked and fixed with the penetrating rod through a screw in.
Furthermore, the side wall of one end, far away from the cylinder, of the disc is connected with a sliding block with a T-shaped cross section, and the side wall of the clamping plate is provided with a T-shaped groove which is transversely communicated.
Furthermore, the disc, the cylinder and the sliding block are of an integrated molding structure.
Further, first connecting rod includes that both ends set up the screwed straight-bar, and the both ends of straight-bar are pegged graft and are had rod end bearing, and rod end bearing's pole portion threaded connection has the ladder nut, and rod end bearing passes through ladder nut and straight-bar fixed connection, and rod end bearing's bearing portion is through round pin axle and lower free bearing and the second connecting rod fixed connection that corresponds.
Furthermore, the second connecting rod comprises a rectangular rod, two ends of the rectangular rod are integrally connected with a U-shaped plate with an outward opening, and through holes are formed in two side walls of the U-shaped plate.
Furthermore, the half-shaft connecting block is fixedly connected with an input shaft of the speed reducer through an input flange, a flat key on the input shaft of the speed reducer is inserted into a key groove on the inner side wall of the input flange, the input flange is provided with a locking hole along the radial direction, the input flange penetrates through the locking hole through a third bolt and is locked on the input shaft of the speed reducer, and the input flange is fixedly connected with the half-shaft connecting block through a fourth bolt.
Further, the semi-axis connecting block includes that a card establishes the chuck on fork truck axle end cover, and the both sides integration of chuck is connected with the lug of symmetry, and the semi-axis connecting block passes lug fixed connection on fork truck axle end cover through the fifth bolt, and the one end integration that the chuck is close to input flange is connected with outside outstanding lug, offers the draw-in groove of inserting with the lug matching on the input flange.
Compared with the prior art, the invention has the beneficial effects that:
1. the data acquisition device is directly connected with the forklift axle end cover through the connection input device, acquires forklift operation performance data in real time, acquires data through the high-precision and high-response-frequency encoder, calculates and converts the acquired data to obtain vehicle running data including vehicle response time, speed, acceleration and the like, can avoid the condition of vehicle response delay caused by factors such as gear clearance and the like in a transmission system, can monitor the vehicle running condition in real time, and can better reflect the operation and control characteristics of the whole forklift;
2. the clamping plate on the clamping and supporting device is fixed on a mudguard above the center of the wheel, the lower hinged support is fixed on the speed reducer, and a connecting part arranged between the clamping plate and the lower hinged support is fixedly connected through a pin shaft and is not rigidly connected, so that the fluctuation of the distance between the axle and the mudguard caused by the road surface and other reasons when the forklift runs is counteracted;
3. the second connecting rod is connected with the cylinder in a separated rotating mode, the arrangement of the penetrating rod enables the installation adjusting range of the upper hinged support to be wider, the penetrating rod is a metal round rod with elastic and plastic properties, the elastic and plastic properties are achieved, part of vibration generated in the running process of the forklift is counteracted, and the service life of equipment is prolonged;
during the test, fork truck normal action, semi-axis connecting block and axle synchronous operation, the speed reducer transfers the axle rotational speed to the required rotational speed of encoder data acquisition, and the data that the encoder then acquireed in real time are spread into data receiving and processing equipment through the pencil to this realizes the test to fork truck operating characteristic.
The forklift driving control characteristic testing device is simple in structure, convenient to install, high in reliability of test results, applicable to various forklift driving control characteristic tests and wide in application range.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of the half-shaft connecting block according to the present invention;
FIG. 3 is a schematic bottom view of FIG. 2 according to the present invention;
FIG. 4 is a schematic front view of an input flange according to the present invention;
FIG. 5 is a side cross-sectional view of the present invention shown in FIG. 4;
FIG. 6 is a schematic view of the front view of the lower hinge base of the present invention;
FIG. 7 is a schematic view of a first linkage of the present invention;
FIG. 8 is a schematic view of a second link structure according to the present invention;
FIG. 9 is a schematic view of the upper hinge base of the present invention;
FIG. 10 is a schematic view of a splint of the present invention;
FIG. 11 is a schematic top view of the structure of FIG. 10 according to the present invention.
The reference numbers illustrate: the device comprises a data acquisition device 1, a speed reducer 11, an encoder 12, a connection input device 2, a half shaft connecting block 21, a chuck 211, a lifting lug 212, a projection 213, an input flange 22, a clamping groove 221, a clamping support device 3, a lower hinge seat 31, a first connecting rod 32, a straight rod 321, a rod end bearing 322, a stepped nut 323, a second connecting rod 33, a rectangular rod 331, a U-shaped plate 332, a penetrating rod 34, an upper hinge seat 35, a disc 351, a cylinder 352, a sliding block 353, a clamping plate 36 and a T-shaped groove 361.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the spirit of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1-11, the present invention provides a technical solution:
a forklift driving control characteristic testing device is shown in figure 1 and comprises a data acquisition device 1, a connection input device 2 and a clamping and supporting device 3, wherein the connection input device 2 is fixed on an axle end cover, and the clamping and supporting device 3 is clamped and fixed on a mudguard above the center of a wheel.
As shown in fig. 1, the data acquisition device 1 includes a speed reducer 11 and an encoder 12 connected to one side end of the speed reducer 11, and the encoder 12 transmits detected data to the data receiving and processing device through a wire harness.
As shown in fig. 1 to 5, the connection input device 2 includes a half-shaft connecting block 21 fixed on an axle end cover, the half-shaft connecting block 21 is fixedly connected to an input shaft of the speed reducer 11, the half-shaft connecting block 21 is fixedly connected to the input shaft of the speed reducer 11 through an input flange 22, a flat key on the input shaft of the speed reducer 11 is inserted into a key groove on an inner side wall of the input flange 22, the input flange 22 is provided with a locking hole in a radial direction, the input flange 22 passes through the locking hole through a third bolt and is locked to the input shaft of the speed reducer 11, and the input flange 22 is fixedly connected to the half-shaft connecting block 21 through a fourth bolt.
As shown in fig. 2 and 3, the half-shaft connecting block 21 includes a chuck 211 clamped on the axle end cover of the forklift, symmetrical lifting lugs 212 are integrally connected to both sides of the chuck 211, the half-shaft connecting block 21 passes through the lifting lugs 212 through a fifth bolt and is fixedly connected to the axle end cover of the forklift, a protruding block 213 protruding outwards is integrally connected to one end of the chuck 211 close to the input flange 22, and as shown in fig. 4 and 5, a slot 221 matched and inserted with the protruding block 213 is formed on the input flange 22.
As shown in fig. 1, the clamping and supporting device 3 includes a lower hinge seat 31 fixed on the upper end surface of the speed reducer 11, the lower hinge seat 31 is fixed on the upper end surface of the speed reducer 11 through a screw, as shown in fig. 6, the upper end of the lower hinge seat 31 is connected with one end of a first connecting rod 32, the other end of the first connecting rod 32 is connected with one end of a second connecting rod 33, the other end of the second connecting rod 33 is rotatably connected with an upper hinge seat 35, a clamping plate 36 is installed on the upper hinge seat 35, the clamping plate 36 is fixedly connected on a fender above the center of a wheel through a first bolt, and the clamping and supporting device adapts to forklifts with different sizes and heights by utilizing the bending amount of the first connecting rod 32 and the second connecting rod 33.
As a preferred embodiment of the present disclosure, as shown in fig. 1 and fig. 9, the upper hinge base 35 includes a circular disc 351, a plurality of first circular holes are formed in the circular disc 351 and are distributed in an equidistant annular manner, and the circular disc 351 is locked on the side wall of the clamping plate 36 through the first circular holes by a second bolt, and is detachably connected, thereby facilitating disassembly and assembly.
As a preferred embodiment of the present disclosure, as shown in fig. 1 and 9, the upper hinge base 35 further includes a cylinder 352 connected to a side wall of the circular disc 351, the cylinder 352 is provided with a through hole along a radial direction, a penetrating rod 34 with two ends extending outward is inserted into the through hole, the second connecting rod 33 is movably inserted into the penetrating rod 34, the penetrating rod 34 is a metal round rod with elastic and plastic properties, and has elastic and buffering properties, one end of the cylinder 352 far away from the circular disc 351 is locked and fixed with the penetrating rod 34 by screwing a screw, and the penetrating rod 34 is provided by separately and rotatably connecting the second connecting rod 33 and the cylinder 352, so that the adjustment range of the upper hinge base 35 is wider.
As a preferred embodiment of the present invention, as shown in fig. 1 and 9, a slider 353 having a T-shaped cross-section is connected to a side wall of the disc 351 at an end away from the cylinder 352, as shown in fig. 10 and 11, a T-shaped groove 361 extending transversely is formed in a side wall of the clamping plate 36, and the slider 353 is inserted into the T-shaped groove 361, so that the upper hinge seat 35 and the clamping plate 36 are more firmly connected, and the disc 351, the cylinder 352 and the slider 353 are integrally formed, thereby having high strength of the integrally formed structure.
As a preferred embodiment of the present disclosure, as shown in fig. 1 and 7, the first connecting rod 32 includes a straight rod 321 with threads at two ends, rod end bearings 322 are inserted into two ends of the straight rod 321, a stepped nut 323 is screwed to a rod portion of each rod end bearing 322, the rod end bearings 322 are fixedly connected to the straight rod 321 through the stepped nut 323, and bearing portions of the rod end bearings 322 are fixedly connected to the corresponding lower hinge base 31 and the second connecting rod 33 through pin shafts, and are detachably connected, so that energy is saved when parts are replaced.
As a preferred embodiment of the present invention, as shown in fig. 1 and 8, the second link 33 includes a rectangular rod 331, U-shaped plates 332 with outward openings are integrally connected to both ends of the rectangular rod 331, through holes are opened on both side walls of the U-shaped plates 332, and the U-shaped plates are wrapped and attached to the rod end bearing 322 at one end of the first link 32, so that friction is increased and structural strength is improved.
The clamping plate 36 on the clamping and supporting device 3 is fixed on a mudguard above the center of a wheel, the lower hinged support 31 is fixed on the speed reducer 11, a connecting part arranged between the clamping plate 36 and the lower hinged support 31 is fixedly connected through a pin shaft and is not rigidly connected, so that the fluctuation of the distance between an axle and the mudguard caused by the road surface and other reasons when the forklift runs is counteracted, the upper hinged support 35 is provided with a wider adjusting range by connecting the second connecting rod 33 and the cylinder 352 in a separated rotating manner and arranging the penetrating rod 34, the penetrating rod 34 is a metal round rod with elastic and plastic properties, the elastic buffer performance is realized, the vibration generated in the running process of a part of the forklift is counteracted, and the service life of the equipment is prolonged; the clamping and supporting device 3 is used for supporting the data acquisition device 1 on one hand, and on the other hand, the swinging of the data acquisition device 1 during working is counteracted, so that the measured data is more accurate.
During the test, fork truck normal action, half shaft connecting block 21 and axle synchronous operation, speed reducer 11 transfers the axle rotational speed to the required rotational speed of encoder 12 data acquisition, and encoder 12 then spreads into data receiving and processing equipment with the data that acquire in real time through the pencil to this realizes the test to fork truck operating characteristic.
The forklift driving control characteristic testing device is simple in structure, convenient to install, high in reliability of test results, applicable to various forklift driving control characteristic tests and wide in application range.
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.
Claims (10)
1. The utility model provides a fork truck operation control characteristic testing arrangement that traveles, includes data acquisition device (1) and connection input device (2), its characterized in that: the data acquisition device (1) comprises a speed reducer (11) and an encoder (12) connected to one side end of the speed reducer (11), the connection input device (2) comprises a half shaft connecting block (21) fixed on an axle end cover, and the half shaft connecting block (21) is fixedly connected to an input shaft of the speed reducer (11);
the device also comprises a clamping and supporting device (3) which is connected with the speed reducer (11) and flexibly supported, and the upper end of the clamping and supporting device (3) is clamped and fixed on a mudguard above the center of the wheel.
2. The forklift running manipulation characteristic testing device according to claim 1, wherein: centre gripping strutting arrangement (3) are including fixing lower free bearing (31) at speed reducer (11) up end, and the one end of first connecting rod (32) is connected to the upper end of lower free bearing (31), and the one end of second connecting rod (33) is connected to the other end of first connecting rod (32), and the other end of second connecting rod (33) rotates and is connected with free bearing (35), goes up and installs splint (36) on free bearing (35), and splint (36) are through first bolt fixed connection on the fender of wheel center top.
3. The forklift running manipulation characteristic testing device according to claim 2, wherein: go up free bearing (35) and include a disc (351), set up a plurality of first round holes that are equidistance annular distribution on disc (351), disc (351) pass first round hole locking on the lateral wall of splint (36) through the second bolt.
4. The forklift running manipulation characteristic testing device according to claim 3, wherein: the upper hinge base (35) further comprises a cylinder (352) connected to the side wall of the disc (351), a through hole is formed in the cylinder (352) along the radial direction, a penetrating rod (34) with two ends extending outwards is inserted in the through hole, the second connecting rod (33) is movably inserted in the penetrating rod (34), and one end, far away from the disc (351), of the cylinder (352) is locked and fixed with the penetrating rod (34) through a screw in.
5. The forklift running manipulation characteristic testing device according to claim 4, wherein: the side wall of one end, far away from the cylinder (352), of the disc (351) is connected with a sliding block (353) with a T-shaped cross section, and a T-shaped groove (361) which is transversely communicated is formed in the side wall of the clamping plate (36).
6. The forklift running manipulation characteristic testing device according to claim 5, wherein: the disc (351), the cylinder (352) and the slider (353) are of an integrated molding structure.
7. The forklift running manipulation characteristic testing device according to claim 2, wherein: the first connecting rod (32) comprises a straight rod (321) with threads arranged at two ends, rod end bearings (322) are inserted into two ends of the straight rod (321), rod part threads of the rod end bearings (322) are connected with stepped nuts (323), the rod end bearings (322) are fixedly connected with the straight rod (321) through the stepped nuts (323), and bearing parts of the rod end bearings (322) are fixedly connected with corresponding lower hinge seats (31) and the second connecting rod (33) through pin shafts.
8. The forklift running manipulation characteristic testing device according to claim 2, wherein: the second connecting rod (33) comprises a rectangular rod (331), two ends of the rectangular rod (331) are integrally connected with a U-shaped plate (332) with an outward opening, and through holes are formed in two side walls of the U-shaped plate (332).
9. The forklift running manipulation characteristic testing device according to claim 1, wherein: the half shaft connecting block (21) is fixedly connected with an input shaft of the speed reducer (11) through an input flange (22), a flat key on the input shaft of the speed reducer (11) is inserted into a key groove on the inner side wall of the input flange (22), a locking hole is formed in the input flange (22) along the radial direction, the input flange (22) penetrates through the locking hole through a third bolt to be locked on the input shaft of the speed reducer (11), and the input flange (22) is fixedly connected with the half shaft connecting block (21) through a fourth bolt.
10. The running manipulation characteristic test apparatus for a forklift according to claim 9, wherein: half shaft connecting block (21) include that a card establishes chuck (211) on fork truck axle end cover, the both sides integration of chuck (211) is connected with lug (212) of symmetry, half shaft connecting block (21) pass lug (212) fixed connection on fork truck axle end cover through the fifth bolt, the one end integration that chuck (211) are close to input flange (22) is connected with outside outstanding lug (213), offer on input flange (22) with lug (213) match draw-in groove (221) of inserting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111444227.1A CN114110389A (en) | 2021-11-30 | 2021-11-30 | Fork truck traveles and controls characteristic test device |
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| CN202111444227.1A CN114110389A (en) | 2021-11-30 | 2021-11-30 | Fork truck traveles and controls characteristic test device |
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| CN110608904A (en) * | 2018-06-15 | 2019-12-24 | 柳州博实唯汽车科技股份有限公司 | Detection apparatus for tire corner synchronous rate |
| CN211085296U (en) * | 2019-09-24 | 2020-07-24 | 中机科(北京)车辆检测工程研究院有限公司 | Novel wheel-side encoder bracket |
| CN212799487U (en) * | 2020-08-24 | 2021-03-26 | 天津信誉科技有限公司 | Forklift for goods transportation |
| CN113034932A (en) * | 2021-03-05 | 2021-06-25 | 中机科(北京)车辆检测工程研究院有限公司 | Vehicle running speed testing system, method and device |
| CN113501468A (en) * | 2021-07-22 | 2021-10-15 | 浙江加力仓储设备股份有限公司 | Three-pivot balance weight type forklift |
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