Variable length telescopic fork

Abstract

The utility model discloses a variable distance telescopic fork, include: base, lay the slide rail, fork is equipped with a pair, the pair of fork all install the sliding block, the sliding block is connected with the slide rail cooperation, variable distance subassembly is installed between the pair of fork, variable distance subassembly includes the variable distance motor fixed on the base, the transmission shaft connected with the variable distance motor, the transmission shaft end installs the follow-up board, both ends of follow-up board all are connected with the connecting rod, and the connecting rod is swing -connected with the pair of fork respectively, and variable distance motor drives follow-up board and connecting rod to move through transmission shaft, makes a pair of fork relative movement or opposite movement, has reduced core component, and the assembly maintenance cost has reduced greatly, avoids the structure redundancy, in the simplification structure's time, realizes stable performance, adapts high frequency, multi -specification goods carrying demand, has the simple nature and reliability advantage.

Description

Technical Field

[0001] This invention relates to the field of forklift technology, and more particularly to a telescopic forklift with variable pitch. Background Technology

[0002] As orders for goods become more diverse, smaller in quantity, and shorter in delivery time, the density of shelving storage and the frequency of material handling are increasing, leading to a higher frequency of forklift use.

[0003] Chinese patent CN216889986U discloses a transmission mechanism suitable for telescopic fork extension and pitch change. This mechanism includes two sets of telescopic forks, with a telescopic transmission mechanism and a pitch change transmission mechanism arranged between them. The telescopic transmission mechanism includes a telescopic motor, a first connecting shaft, and a splined shaft. The output end of the telescopic motor is connected to the first connecting shaft via a chain. Two splined shafts are included, with one end of each splined shaft connected to the first connecting shaft. An inner splined sleeve is provided on the telescopic fork to connect the other end of the splined shaft. The pitch change transmission mechanism includes a pitch change motor, a second connecting shaft, and a T-screw. The output end of the pitch change motor is connected to the second connecting shaft via a chain. Two T-screws are included, with one end of each T-screw connected to the second connecting shaft and the other end connected to the telescopic fork, achieving the purpose of pitch change. This structure is overly complex, and after prolonged actual use, its accuracy decreases, and it is prone to problems such as poor stability and low pitch change speed, limiting the application range of the equipment.

[0004] Therefore, it is necessary to develop a variable-pitch telescopic fork to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a simple and stable variable-pitch telescopic fork.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable pitch telescopic fork, comprising: The base is equipped with sliding rails; The forks are provided in a pair, and each of the forks is equipped with a slider, which is connected to the slide rail. A pitch control assembly is installed between the pair of forks. The pitch control assembly includes a pitch control motor fixed on the base and a drive shaft connected to the pitch control motor. A follower plate is installed at the end of the drive shaft. Both ends of the follower plate are connected to connecting rods, which are movably connected to the pair of forks respectively.

[0007] Furthermore, each end of the connecting rod is provided with a connecting shaft. One end of the connecting shaft passes through the connecting rod and is connected to the follower plate, while the other connecting shaft passes through the other end of the connecting rod and is connected to the fork.

[0008] Furthermore, the follower plate is rhomboid in shape.

[0009] Furthermore, the fork includes a drive unit, a lower fork connected to the drive unit, a middle fork moving along the lower fork, and an upper fork moving along the middle fork.

[0010] Furthermore, the drive unit is mounted on any of the forks and is connected to a transmission rod, which is connected to the other fork. The drive unit drives the pair of forks to move synchronously through the transmission rod.

[0011] Furthermore, the lower fork includes a base frame, a transmission gear installed in the base frame, and a first gear rail. Vertical plates are provided on both sides of the first gear rail, and several limiting members and several rollers are provided on the inner side of the vertical plates.

[0012] Furthermore, one end of the limiting member is fixedly connected to the inner side of the vertical plate, and the other end extends horizontally relative to it, with a plurality of rollers arranged horizontally relative to each other from the inner side of the vertical plate.

[0013] Furthermore, multiple transmission gears are provided, and the multiple transmission gears mesh with each other and are connected to the driving component.

[0014] Furthermore, the middle fork is recessed inward from both sides to form a first sliding groove, the first sliding groove extends from one end of the middle fork to the other end, and a plurality of the limiting members and a plurality of the rollers extend into the first sliding groove.

[0015] Furthermore, the fork member is provided with a second toothed rail, and the transmission gear meshes with the second toothed rail.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a variable pitch telescopic fork, which has the characteristics of simple structure and stability. The variable pitch motor drives the follower plate and connecting rod to move through the transmission shaft, so that a pair of forks can move relative to each other or in opposite directions. This reduces the core components, significantly reduces assembly and maintenance costs, and avoids structural redundancy. While simplifying the structure, it achieves stable performance, adapts to the needs of high-frequency and multi-specification cargo handling, and has the advantages of simplicity and reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a variable-pitch telescopic fork according to the present invention; Figure 2for Figure 1 A partial structural diagram of the variable-pitch telescopic fork shown. Figure 3 for Figure 2 An exploded view of the variable pitch telescopic fork shown.

[0019] In the diagram: 1. Base; 11. Slide rail; 2. Pitch conversion assembly; 21. Pitch conversion motor; 22. Drive shaft; 23. Follower plate; 24. Connecting rod; 25. Connecting shaft; 3. Fork; 31. Slider; 32. Drive component; 33. Lower fork; 331. Base frame; 3311. Connecting part; 3312. Support part; 332. Transmission gear; 333. First gear rail; 334. Vertical plate; 335. Limiting component; 336. Roller; 34. Middle fork; 341. First slide groove; 342. Empty groove; 343. Second gear rail; 35. Upper fork; 351. Clearance groove. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a variable-pitch telescopic fork proposed according to this utility model. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] The following description, in conjunction with the accompanying drawings, details a specific solution for a variable-pitch telescopic fork provided by this utility model.

[0023] Please refer to Figures 1 to 3 A telescopic fork with variable pitch includes a base 1, a pitch control assembly 2 mounted on the base 1, and a pair of forks 3 pushed by the pitch control assembly 2.

[0024] Please refer to Figure 1 The base 1 has a slide rail 11 on its surface, and the forks 3 are equipped with sliders 31. The forks 3 move along the slide rail 11 via the sliders 31.

[0025] Please refer to Figure 1 The pitch control assembly 2 is located between a pair of forks 3, and includes a pitch control motor 21, a drive shaft 22 connected to the pitch control motor 21, and a follower plate 23 fixedly connected to the drive shaft 22. The pitch control motor 21 is fixedly connected to the base 1, and one end of the drive shaft 22 is connected to the pitch control motor 21, while the other end is connected to the follower plate 23.

[0026] The shape of the follower plate 23 can be changed according to requirements, such as rectangular or elliptical. In this embodiment, the follower plate 23 is rhomboid, and connecting rods 24 are installed at both ends. Specifically, each end of the connecting rod 24 is provided with a connecting shaft 25. One end of the connecting shaft 25 passes through the connecting rod 24 and is connected to the follower plate 23, and the other end of the connecting rod 24 passes through the connecting rod 24 and is connected to the fork 3.

[0027] Please refer to Figures 2 to 3 The fork 3 includes a drive unit 32, a lower fork 33 connected to the drive unit 32, a middle fork 34 moving along the lower fork 33, and an upper fork 35 moving along the middle fork 34.

[0028] The drive unit 32 is mounted on any of the forks 3 and is connected to a transmission rod (not shown). The transmission rod is connected to another fork 3. The drive unit 32 is a motor that drives the pair of forks 3 to move synchronously through the transmission rod.

[0029] Please refer to Figure 3 The lower fork member 33 includes a base frame 331, a transmission gear 332 and a first toothed rail 333 installed within the base frame 331, a connecting part 3311 and a supporting part 3312 of the base frame 331. The connecting part 3311 is located at the bottom of the supporting part 3312 and is used to accommodate part of the transmission rod. The supporting part 3312 is horizontal, and its upper surface is provided with the first toothed rail 333. Vertical plates 334 are provided on both sides of the first toothed rail 333. The bottom of the vertical plates 334 is fixedly connected to the supporting part 3312, and its top extends vertically upward. The inner side of the vertical plates 334 is provided with a number of limiting members 335 and a number of rollers 336. One end of the limiting member 335 is fixedly connected to the inner side of the vertical plate 334, and the other end extends horizontally relative to it to limit the middle fork member 34. The number of rollers 336 are horizontally opposite to each other from the inner side of the vertical plate 334.

[0030] Multiple transmission gears 332 are provided, and the multiple transmission gears 332 mesh with each other and are connected to the drive component 32.

[0031] The middle fork 34 is recessed inward from both sides to form a first sliding groove 341. The first sliding groove 341 extends from one end of the middle fork 34 to the other end. Several limiting members 335 and several rollers 336 extend into the first sliding groove 341, so that the middle fork 34 can only move along the several limiting members 335 and several rollers 336. The middle fork 34 is recessed inward from its bottom to form a hollow groove 342. The hollow groove 342 extends from one end of the middle fork 34 to the other end, so as to avoid interference with the first toothed rail 333 when the middle fork 34 moves. A second toothed rail 343 is provided in the hollow groove 342. The second toothed rail 343 extends from one end of the hollow groove 342 to the other end. The transmission gear 332 extends into the hollow groove 342 and meshes with the second toothed rail 343.

[0032] Preferably, the top of the fork member 34 is provided with a plurality of limiting members 335 and a plurality of rollers 336.

[0033] The upper fork 35 includes a recessed groove 351 formed from its lower surface. The top of the middle fork 34 extends into the recessed groove 341, and several limiting members 335 and several rollers 336 on its top enter the recessed groove 351, so that the upper fork 35 moves along the limiting members 335 and the rollers 336.

[0034] A third toothed rail (not shown) is provided in the clearance groove 351. The third toothed rail extends from one end of the upper fork 35 to the other end. An intermediate gear (not shown) is installed in the middle fork 34. The intermediate gear meshes with the first toothed rail 333 and the third toothed rail respectively.

[0035] When this utility model discloses a variable pitch telescopic fork, the variable pitch motor 21 drives the transmission shaft 22 fixedly connected to it to rotate. The transmission shaft 22 further drives the follower plate 23 at the end to rotate synchronously. When the follower plate 23 rotates, the connecting rod 24 connected to its two ends through the connecting shaft 25 generates a pushing and pulling action. One end of the connecting rod 24 moves in a circle with the follower plate 23, and the other end pushes or pulls the corresponding fork 3 through the connecting shaft 25. The slider 31 at the bottom of the fork 3 slides along the slide rail 11 on the surface of the base 1. Due to the symmetrical structure of the follower plate 23, a pair of forks 3 will move symmetrically in opposite directions or in the opposite direction along the slide rail 11 (moving in opposite directions decreases the distance, and moving in the opposite direction increases the distance) until the distance matches the width of the goods. Then, the variable pitch motor 21 is de-energized, the forks 3 stop moving and maintain the current distance.

[0036] The drive unit 32 directly drives multiple transmission gears 332 to rotate. When the transmission gears 332 rotate, they mesh with the second toothed rail 343, generating a thrust along the toothed rail direction. The middle fork 34 cooperates with the limiting member 335 and roller 336 on the vertical plate 334 of the lower fork 33 through the first sliding groove 341 on both sides, and extends horizontally along the support part 3312 of the lower fork 33. When the middle fork 34 extends, the intermediate gear installed inside it moves with the middle fork 34 and meshes with the first toothed rail 333 to generate rotation. The rotating intermediate gear further meshes with the third toothed rail, pushing the upper fork 35 to extend horizontally along the limiting member 335 and roller 336 on the top of the middle fork 34. Finally, the upper fork 35 extends to the preset position at the bottom of the goods, the drive unit 32 is de-energized, the extension and retraction action stops, and after the goods are transported to the target position, the drive unit 32 rotates in the reverse direction, driving the forks to retract sequentially.

[0037] This utility model is a variable pitch telescopic fork, which features a simple and stable structure. The variable pitch motor drives the follower plate and connecting rod to move through the transmission shaft, so that a pair of forks can move relative to each other or in opposite directions. This reduces the number of core components, significantly lowers assembly and maintenance costs, and avoids structural redundancy. While simplifying the structure, it achieves stable performance, adapts to the needs of high-frequency and multi-specification cargo handling, and has the advantages of simplicity and reliability.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable-pitch telescopic fork, characterized in that, include: The base (1) is equipped with a slide rail (11); The forks (3) are provided in pairs, and each pair of forks (3) is equipped with a slider (31), which is connected to the slide rail (11). A pitch control assembly (2) is installed between the pair of forks (3). The pitch control assembly (2) includes a pitch control motor (21) fixed on the base (1) and a drive shaft (22) connected to the pitch control motor (21). A follower plate (23) is installed at the end of the drive shaft (22). Both ends of the follower plate (23) are connected to connecting rods (24). The connecting rods (24) are movably connected to the pair of forks (3).

2. The variable pitch telescopic fork according to claim 1, characterized in that: Both ends of the connecting rod (24) are provided with connecting shafts (25). One end of the connecting shaft (25) passes through the connecting rod (24) and is connected to the follower plate (23). The other connecting shaft (25) passes through the other end of the connecting rod (24) and is connected to the fork (3).

3. The variable-pitch telescopic fork according to claim 1, characterized in that: The follower plate (23) is rhomboid.

4. The variable-pitch telescopic fork according to claim 1, characterized in that: The fork (3) includes a drive member (32), a lower fork (33) connected to the drive member (32), a middle fork (34) moving along the lower fork (33), and an upper fork (35) moving along the middle fork (34).

5. The variable-pitch telescopic fork according to claim 4, characterized in that: The drive unit (32) is mounted on any of the forks (3) and is connected to a transmission rod, which is connected to the other fork (3). The drive unit (32) drives the pair of forks (3) to move synchronously through the transmission rod.

6. The variable pitch telescopic fork according to claim 5, characterized in that: The lower fork (33) includes a base frame (331), a transmission gear (332) installed in the base frame (331), and a first toothed rail (333). The first toothed rail (333) has vertical plates (334) on both sides, and the vertical plates (334) have several limiting members (335) and several rollers (336) on their inner sides.

7. The variable pitch telescopic fork according to claim 6, characterized in that: One end of the limiting member (335) is fixedly connected to the inner side of the vertical plate (334), and the other end extends horizontally relative to it. A plurality of rollers (336) are arranged horizontally relative to each other from the inner side of the vertical plate (334).

8. The variable pitch telescopic fork according to claim 6, characterized in that: Multiple transmission gears (332) are provided, and the multiple transmission gears (332) mesh with each other and are connected to the drive member (32).

9. The variable-pitch telescopic fork according to claim 7, characterized in that: The middle fork (34) is recessed inward from both sides to form a first groove (341). The first groove (341) extends from one end of the middle fork (34) to the other end. A plurality of limiting members (335) and a plurality of rollers (336) extend into the first groove (341).

10. The variable pitch telescopic fork according to claim 8, characterized in that: The middle fork (34) is provided with a second toothed rail (343), and the transmission gear (332) meshes with the second toothed rail (343).

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