Roller structure of forklift

Abstract

The utility model provides a roller structure of a forklift and belongs to the technical field of forklifts. The problem that large noise is generated when rolling wheels of an existing forklift roll on the ground is solved. The idler wheel structure of the forklift comprises a pallet fork, an idler wheel assembly located in the front end of the pallet fork and a connecting rod arranged in the pallet fork and connected with the idler wheel assembly, the idler wheel assembly comprises an idler wheel, an annular positioning groove is formed in the circumferential face of the idler wheel, a rubber ring is embedded in the positioning groove, and the outer diameter of the rubber ring is larger than that of the idler wheel. According to the roller structure of the forklift, noise generated when the roller rolls is remarkably reduced, meanwhile, the circumferential face of the roller is not prone to abrasion, and the service life of the roller is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of forklifts, in particular to a roller structure of a forklift. Background Art

[0002] A forklift is an industrial handling vehicle, referring to various wheeled handling vehicles for loading, unloading, stacking, and short-distance transportation of palletized goods. Forklifts are one of the most widely used mechanical equipment in the industrial field. Whether it is in warehouses, factories, or construction sites, a large amount of goods handling work requires the use of forklifts. Existing forklifts are mainly divided into counterbalanced forklifts and pallet jacks.

[0003] At present, the Chinese Patent Network discloses an electric pallet jack [Application No.: 2023107401204], which includes a fork, an intermediate connecting seat, a first hinge mechanism, a first connecting rod, a second hinge mechanism, a passive walking wheel, a support seat, a lifting drive mechanism, an operating handle, a hub motor, and a battery. The intermediate connecting seat is fixed to one end of the fork. The first hinge mechanism is connected to the intermediate connecting seat. One end of the first connecting rod is hinged to the first hinge mechanism, and the other end of the first connecting rod is hinged to the second hinge mechanism. The other end of the fork is fixed to the second hinge mechanism. The passive walking wheel is installed on the second hinge mechanism, and the first hinge mechanism is also hinged to the support seat.

[0004] The above-mentioned electric pallet jack has the following defects: During the use of the electric pallet jack, the passive walking wheel is always in contact with the ground. Since the passive walking wheel needs to bear a large gravity, in order to ensure good pressure-bearing performance, the passive walking wheel is generally made of metal material. During the process of the electric pallet jack handling goods, the passive walking wheel generates a large noise when rolling on the ground, and the surface of the passive walking wheel is also easily worn. When the surface of the passive walking wheel is worn, due to the surface of the passive walking wheel no longer being smooth and flat, the passive walking wheel will make a greater noise when rolling on the ground. Summary of the Utility Model

[0005] The purpose of the present utility model is to address the above problems existing in the prior art and propose a roller structure of a forklift. The technical problem to be solved by the present utility model is: how to solve the problem that the roller of the forklift generates a large noise when rolling on the ground.

[0006] The purpose of the present utility model can be achieved by the following technical solutions:

[0007] A roller structure of a forklift includes a fork, a roller assembly located inside the front end of the fork, and a connecting rod disposed inside the fork and connected to the roller assembly. The roller assembly includes a roller. It is characterized in that an annular positioning groove is formed on the circumferential surface of the roller, and a rubber ring is embedded in the positioning groove, and the outer diameter of the rubber ring is greater than the outer diameter of the roller.

[0008] Working principle: The forklift forks move synchronously with the connecting rod and the roller assembly located at the front end of the forklift forks. The roller assembly is connected to the connecting rod. In this structure, part of the rubber ring is embedded in the positioning groove of the roller. The positioning groove positions the rubber ring to prevent the rubber ring from shifting on the roller. The outer diameter of the rubber ring is larger than that of the roller, so that a part of the rubber ring is located outside the positioning groove. The rubber ring is in direct contact with the ground, while the circumferential surface of the roller is not in contact with the ground, thereby significantly reducing the noise generated when the roller rolls. At the same time, the circumferential surface of the roller is not easily worn, and the service life of the roller is also extended.

[0009] In the roller structure of a forklift as described above, there are at least two of the above-mentioned positioning grooves on the circumferential surface of the roller, and all the positioning grooves are arranged at intervals along the axial direction of the roller. Each positioning groove is embedded with the above-mentioned rubber ring.

[0010] More than two rubber rings are provided on each roller to improve the support for the roller, making the roller more stable during the rolling process.

[0011] In the roller structure of a forklift as described above, there are two of the above-mentioned positioning grooves on the circumferential surface of the roller, and the two positioning grooves are symmetrically arranged left and right. Each positioning groove is embedded with the above-mentioned rubber ring.

[0012] The left and right rubber rings support the roller, ensuring smooth rolling of the roller and reducing wear on the support of the rubber ring.

[0013] In the roller structure of a forklift as described above, the roller assembly includes a swing frame, a first hinge shaft, and a support plate provided on the forklift forks. There are two support plates which are symmetrically arranged left and right. The two ends of the first hinge shaft are respectively passed through the corresponding support plates. The swing frame has a mounting sleeve, and the first hinge shaft passes through the mounting sleeve. A first buffer pad sleeved on the first hinge shaft is provided between the end of the mounting sleeve and the inner side wall of the support plate.

[0014] During the lifting and lowering process of the forklift forks, the swing frame rotates around the first hinge shaft, and the swing frame will move left and right axially along the first hinge shaft. The setting of the first buffer pad prevents the end face of the mounting sleeve from hitting the inner side wall of the support plate, thereby reducing the noise.

[0015] In the roller structure of a forklift as described above, there is a first convex platform protruding towards the end of the mounting sleeve on the inner side wall of the support plate. The first hinge shaft passes through the first convex platform, and the first buffer pad is arranged between the end face of the first convex platform and the end face of the mounting sleeve.

[0016] The setting of the first convex platform makes the thickness of the first buffer pad not too thick, reducing the manufacturing cost, and at the same time ensuring a good noise reduction effect.

[0017] In the roller structure of a forklift described above, the swing frame has two connecting parts, and a second hinge shaft is arranged between the two connecting parts. The end of the connecting rod has a connecting sleeve sleeved on the second hinge shaft, and a second buffer pad sleeved on the second hinge shaft is arranged between the end face of the connecting sleeve and the inner side wall of the connecting part.

[0018] During the process of the connecting rod driving the swing frame to rotate, the connecting sleeve will move left and right along the axial direction of the second hinge shaft. The setting of the second buffer pad prevents the end face of the connecting sleeve from hitting the inner side wall of the connecting part, thereby reducing the noise.

[0019] In the roller structure of a forklift described above, a second boss protruding towards the end of the connecting sleeve is provided on the inner side wall of the connecting part. The second hinge shaft passes through the second boss, and the second buffer pad is arranged between the end face of the second boss and the end face of the connecting sleeve.

[0020] The setting of the second boss makes the thickness of the buffer pad not too thick, reducing the manufacturing cost, and at the same time ensuring a good noise reduction effect.

[0021] In the roller structure of a forklift described above, an installation frame is hinged to the rear end of the fork. A support roller is rotatably connected to the installation frame, and a support rubber ring is sleeved on the support roller. The outer diameter of the support rubber ring is larger than the outer diameter of the support roller.

[0022] The setting of this structure improves the support force at the rear end of the fork, and by sleeving a support rubber ring on the support roller, the noise is reduced, the wear of the support roller is reduced, and the service life of the support roller is prolonged.

[0023] In the roller structure of a forklift described above, there are two forks, and an installation cross beam is connected between the two forks. The installation frame is hinged to the installation cross beam, and the support roller is located between the two forks.

[0024] The setting of the support roller and the installation cross beam improves the balance of the entire forklift, makes the center of gravity close to the midline, and facilitates the use of the forklift.

[0025] Compared with the prior art, the roller structure of the forklift of the present invention has the following advantages: In this structure, part of the rubber ring is embedded in the positioning groove, and the positioning groove plays a role in positioning the rubber ring to prevent the rubber ring from shifting on the roller. The outer diameter of the rubber ring is larger than the outer diameter of the roller, so that a part of the rubber ring is located outside the positioning groove, and the rubber ring is in direct contact with the ground, while the circumferential surface of the roller is not in contact with the ground, thereby significantly reducing the noise when the roller rolls, and at the same time the circumferential surface of the roller is not easily worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is one of the three-dimensional structure schematic diagrams of the present invention.

[0027] Figure 2 It is the second three-dimensional structure schematic diagram of the utility model.

[0028] Figure 3 It is the partial three-dimensional structure schematic diagram of the utility model.

[0029] Figure 4 It is the three-dimensional structure schematic diagram of removing the rubber ring in the roller assembly of the utility model.

[0030] In the figure, 1 is the forklift fork; 10 is the mounting crossbeam; 2 is the roller assembly; 20 is the roller; 200 is the positioning groove; 21 is the rubber ring; 22 is the swing frame; 220 is the mounting sleeve; 221 is the connecting part; 2210 is the second boss; 222 is the second hinge shaft; 23 is the first hinge shaft; 24 is the support plate; 240 is the first boss; 25 is the first buffer pad; 26 is the second buffer pad; 27 is the roller frame; 3 is the connecting rod; 30 is the connecting sleeve; 4 is the mounting frame; 40 is the support roller; 41 is the support rubber ring. Specific embodiments

[0031] The following are specific embodiments of the utility model and in combination with the attached drawings, the technical solutions of the utility model are further described, but the utility model is not limited to these embodiments.

[0032] As Figure 1 shown, the roller structure of this forklift includes a forklift fork 1, a roller assembly 2 hinged inside the front end of the forklift fork 1, and a connecting rod 3 arranged inside the forklift fork 1 and connected to the roller assembly 2. The roller assembly 2 includes a roller 20.

[0033] Specifically, as Figures 1 - 4 shown, an annular positioning groove 200 is formed on the circumferential surface of the roller 20, and a rubber ring 21 is embedded in the positioning groove 200. In this embodiment, the cross-section of the rubber ring 21 is circular, and the outer diameter of the rubber ring 21 is larger than the outer diameter of the roller 20.

[0034] In this structure, part of the rubber ring 21 is embedded in the positioning groove 200, and the positioning groove 200 plays a role in positioning the rubber ring 21 to prevent the rubber ring 21 from shifting on the roller 20. The fact that the outer diameter of the rubber ring 21 is larger than the outer diameter of the roller 20 makes a part of the rubber ring 21 located outside the positioning groove 200. The rubber ring 21 is in direct contact with the ground, while the circumferential surface of the roller 20 is not in contact with the ground, thereby significantly reducing the noise when the roller 20 rolls, and at the same time, the circumferential surface of the roller 20 is not easily worn.

[0035] In specific settings, the rubber ring can be other shapes such as oval or square.

[0036] As Figure 3 and Figure 4As shown, there are at least two positioning grooves 200 on the circumferential surface of the roller 20. All the positioning grooves 200 are arranged at intervals along the axial direction of the roller 20. A rubber ring 21 is embedded in each positioning groove 200. In this embodiment, there are two positioning grooves 200 on the circumferential surface of the roller 20. The two positioning grooves 200 are symmetrically arranged left and right. A rubber ring 21 is embedded in each positioning groove 200. The two rubber rings 21 on the left and right form a support for the roller 20, ensuring the smooth rolling of the roller 20.

[0037] As Figure 3 and Figure 4 shown, the roller assembly 2 includes a swing frame 22, a first hinge shaft 23, and a support plate 24 provided on the forklift 1. There are two support plates 24, which are symmetrically arranged left and right. The two ends of the first hinge shaft 23 are respectively inserted through the corresponding support plates 24. The swing frame 22 has a mounting sleeve 220. The first hinge shaft 23 is arranged through the mounting sleeve 220. A first buffer pad 25 sleeved on the first hinge shaft 23 is provided between the end of the mounting sleeve 220 and the inner side wall of the support plate 24. In this embodiment, there is a first boss 240 protruding towards the end of the mounting sleeve 220 on the inner side wall of the support plate 24. The first hinge shaft 23 passes through the first boss. The first buffer pad 25 is provided between the end face of the first boss 240 and the end face of the mounting sleeve 220. During the lifting and lowering process of the forklift, the swing frame 22 rotates around the first hinge shaft 23, and the swing frame 22 will move left and right along the axial direction of the first hinge shaft 23. The setting of the first buffer pad 25 prevents the end face of the mounting sleeve 220 from hitting the inner side wall of the support plate 24, thereby reducing the noise.

[0038] As Figure 3 and Figure 4 shown, the swing frame 22 has two connecting parts 221. A second hinge shaft 222 is provided between the two connecting parts 221. The end of the connecting rod 3 has a connecting sleeve 30 sleeved on the second hinge shaft 222. A second buffer pad 26 sleeved on the second hinge shaft 222 is provided between the end face of the connecting sleeve 30 and the inner side wall of the connecting part 221. In this embodiment, there is a second boss 2210 protruding towards the end of the connecting sleeve 30 on the inner side wall of the connecting part 221. The second hinge shaft 222 passes through the second boss 2210. The second buffer pad 26 is provided between the end face of the second boss 2210 and the end face of the connecting sleeve 30. During the process of the connecting rod 3 driving the swing frame 22 to rotate, the connecting sleeve 30 will move left and right along the axial direction of the second hinge shaft 222. The setting of the second buffer pad 26 prevents the end face of the connecting sleeve 30 from hitting the inner side wall of the connecting part 221, thereby reducing the noise.

[0039] As Figure 3 shown, the roller assembly 2 includes a roller frame 27. The roller frame 27 is hinged to the swing frame 22. At least two rollers 20 are installed on the roller frame 27.

[0040] As Figure 1 and Figure 2 As shown, a mounting bracket 4 is hinged to the rear end of the fork 2. A support roller 40 is rotatably connected to the mounting bracket 4. A support rubber ring 41 is sleeved on the support roller 40. The outer diameter of the support rubber ring 41 is larger than the outer diameter of the support roller 40. There are two forks 2, and a mounting cross beam 10 is connected between the two forks 2. The mounting bracket 4 is hinged to the mounting cross beam 10, and the support roller 40 is located between the two forks 2.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A roller structure for a forklift, comprising a fork (1), a roller assembly (2) hinged in the front end of the fork (1), and a connecting rod (3) arranged in the fork (1) and connected to the roller assembly (2), wherein the roller assembly (2) comprises a roller (20), characterized in that: An annular positioning groove (200) is provided on the circumferential surface of the roller (20), a rubber ring (21) is embedded in the positioning groove (200), and the outer diameter of the rubber ring (21) is greater than the outer diameter of the roller (20).

2. The roller structure of a forklift according to claim 1, characterized in that: The roller (20) has at least two positioning grooves (200) on its circumferential surface. All positioning grooves (200) are arranged at intervals along the axial direction of the roller (20), and each positioning groove (200) has a rubber ring (21) embedded in it.

3. A roller structure for a forklift according to claim 1 or 2, characterized in that: The roller (20) has two positioning grooves (200) on its circumferential surface. The two positioning grooves (200) are arranged symmetrically on both sides, and each positioning groove (200) has a rubber ring (21) embedded in it.

4. A roller structure for a forklift according to claim 1 or 2, characterized in that: The roller assembly (2) comprises a swing frame (22), an articulated shaft (23) and a support plate (24) arranged on the fork (1); the support plates (24) have two and are arranged symmetrically on the left and right; the two ends of the articulated shaft (23) are respectively passed through the corresponding support plates (24); the swing frame (22) has a mounting sleeve (220); the articulated shaft (23) is passed through the mounting sleeve (220); and a buffer pad (25) which is sleeved on the articulated shaft (23) is arranged between the end of the mounting sleeve (220) and the inner side wall of the support plate (24).

5. The roller structure of a forklift according to claim 4, characterized in that: The inner side wall of the support plate (24) is provided with a boss 1 (240) protruding toward the end of the mounting sleeve (220), the hinge shaft 1 (23) is arranged through the boss 1, and the buffer pad 1 (25) is arranged between the end surface of the boss 1 (240) and the end surface of the mounting sleeve (220).

6. The roller structure of a forklift according to claim 4, characterized in that: The swing frame (22) has two connecting parts (221), and a second hinge shaft (222) is arranged between the two connecting parts (221). The end of the connecting rod (3) has a connecting sleeve (30) sleeved on the second hinge shaft (222), and a second buffer pad (26) sleeved on the second hinge shaft (222) is arranged between the end surface of the connecting sleeve (30) and the inner side wall of the connecting part (221).

7. The roller structure of a forklift according to claim 6, characterized in that: The inner side wall of the connecting portion (221) is provided with a second boss (2210) protruding toward the end of the connecting sleeve (30), the second hinge shaft (222) is arranged through the second boss (2210), and the second buffer pad (26) is arranged between the end surface of the second boss (2210) and the end surface of the connecting sleeve (30).

8. A roller structure for a forklift according to claim 1 or 2, characterized in that: A mounting frame (4) is hingedly connected to the rear end of the fork (1); a supporting roller (40) is rotatably connected to the mounting frame (4); a supporting rubber ring (41) is sleeved on the supporting roller (40); and the outer diameter of the supporting rubber ring (41) is larger than the outer diameter of the supporting roller (40).

9. The roller structure of a forklift according to claim 8, characterized in that: Two cargo forks (1) are provided, a mounting crossbeam (10) is connected between the two cargo forks (1), the mounting frame (4) is hinged on the mounting crossbeam (10), and the supporting roller (40) is located between the two cargo forks (1).

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