A load wheel horizontal tightening mechanism

Abstract

The utility model relates to a kind of load wheel horizontal tightening mechanism, belong to handling equipment technical field.The utility model discloses pallet fork frame, drive connecting rod, force arm frame, wheel group, one end of force arm frame is equipped with first rotary joint and second rotary joint, the other end is equipped with third rotary joint, drive connecting rod is rotatably connected in first rotary joint, pallet fork frame is rotatably connected in second rotary joint, wheel group is rotatably connected in third rotary joint;Wheel group includes two pieces of connecting plate oppositely arranged, two load wheels being equipped between two pieces of connecting plate, and the upper end of at least one piece of connecting plate is equipped with elastic resistance piece on the both sides of third rotary joint respectively, and elastic resistance piece cooperates with pallet fork frame top surface.The utility model can effectively avoid the swing of load wheel group when shrinking, to avoid the collision of load wheel and tray.

Description

Technical Field

[0001] This utility model relates to the field of material handling equipment technology, and in particular to a horizontal tightening mechanism for the load-bearing wheels of a forklift fork carriage. Background Technology

[0002] Currently, in order to improve the adaptability of the load-bearing wheel set of the forklift fork carriage to the flatness of the road surface, a swingable wheel set structure is generally adopted. For example, the patent document with publication number CN116374893A discloses a pallet truck for transporting cross pallets, including a forklift body, a fork arm assembly and two load-bearing wheels. The load-bearing wheels are provided at the bottom of the fork arm, and the load-bearing wheels have a movement stroke that moves towards and away from the fork arm. In actual operation, when the fork arm is inserted into the pallet hole of the cross pallet, the load-bearing wheels retract towards the bottom of the fork arm to avoid friction with the bottom of the pallet.

[0003] However, the load-bearing wheels of the aforementioned pallet trucks are prone to colliding with the pallets. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide a horizontal tightening mechanism for the bearing wheel, which can effectively prevent the bearing wheel assembly from swinging during contraction, thereby preventing the bearing wheel from colliding with the pallet.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A load-bearing wheel horizontal tightening mechanism includes a fork carriage, a drive linkage, a lever arm, and a wheel assembly. One end of the lever arm is provided with a first rotating connection point and a second rotating connection point, and the other end is provided with a third rotating connection point. The drive linkage is rotatably connected to the first rotating connection point, the fork carriage is rotatably connected to the second rotating connection point, and the wheel assembly is rotatably connected to the third rotating connection point. The wheel assembly includes two oppositely arranged connecting plates and two load-bearing wheels disposed between the two connecting plates. At least one connecting plate has elastic abutment members on its upper end and on both sides of the third rotating connection point, and the elastic abutment members cooperate with the top surface of the fork carriage.

[0007] Preferably, the elastic abutment includes an integrally formed mounting plate, an elastic plate, and an abutment plate, with the elastic plate obliquely connected between the mounting plate and the abutment plate.

[0008] Preferably, the mounting plate and the contact plate are arranged along the length direction of the connecting plate.

[0009] Preferably, at least two fixing bolts are provided between the mounting plate and the connecting plate.

[0010] Preferably, the abutment piece is closer to the side end of the connecting plate than the mounting piece.

[0011] Preferably, the two elastic abutment members are symmetrically arranged on both sides of the third rotation connection point.

[0012] Preferably, the two bearing wheels are symmetrically arranged on both sides of the third rotation connection point.

[0013] Preferably, the third rotating connection point is located at the middle of the length direction of the connecting plate.

[0014] Preferably, the position of the first rotating connection point is higher than the position of the second rotating connection point.

[0015] The advantages of this utility model are:

[0016] 1. By using the elastic contact element to engage with the top surface of the fork carriage, the wheel assembly is prevented from swinging in the retracted state, thus preventing the wheel assembly from extending out of the fork carriage and colliding with the pallet;

[0017] 2. The elastic abutment can prevent the wheel assembly from colliding with the top surface of the fork carriage, making the retraction process of the wheel assembly smoother and avoiding damage to the equipment;

[0018] 3. The elastic abutment has a simple structure, can be installed on existing equipment, has low cost, and is easy to promote and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a load-bearing wheel horizontal tightening mechanism provided in the embodiments of this specification;

[0020] Figure 2 A front view of a load-bearing wheel horizontal tightening mechanism provided in an embodiment of this specification;

[0021] Figure 3 This is a schematic diagram of the extended state of a load-bearing wheel horizontal tightening mechanism provided in an embodiment of this specification;

[0022] Figure 4 This is a schematic diagram of the retracted state of a horizontal tightening mechanism for a bearing wheel provided in an embodiment of this specification;

[0023] Figure 5 This is a schematic diagram of the structure of the elastic abutment provided in the embodiments of this specification;

[0024] In the diagram: 1-Fork carriage; 2-Drive linkage; 3-Lift arm; 31-First rotating connection point; 32-Second rotating connection point; 33-Third rotating connection point; 4-Wheel assembly; 41-Connecting plate; 42-Load-bearing wheel; 5-Elastic abutment; 51-Mounting plate; 52-Elastic plate; 53-Abutment plate; 6-Fixing bolt. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] As mentioned in the background art, although the pallet truck can retract the load-bearing wheel set to the bottom of the fork arm, since the load-bearing wheel set is a swingable structure, a single load-bearing wheel can still easily extend downwards to the bottom of the fork arm due to the swing of the wheel set, which can easily cause a collision with the end of the pallet when picking up the pallet.

[0027] Therefore, such as Figure 1-4 As shown, this embodiment provides a load-bearing wheel horizontal tightening mechanism, including a fork carriage 1, a drive link 2, a lever arm 3, and a wheel set 4. Conventionally, one end of the lever arm 3 is provided with a first rotating connection point 31 and a second rotating connection point 32, and the other end is provided with a third rotating connection point 33. The drive link 2 is rotatably connected to the first rotating connection point 31, the fork carriage 1 is rotatably connected to the second rotating connection point 32, and the wheel set 4 is rotatably connected to the third rotating connection point 33. The wheel set 4 includes two connecting plates 41 arranged opposite each other and two load-bearing wheels 42 disposed between the two connecting plates 41. Thus, when the drive link 2 performs a push-pull action, it will drive the lever arm 3 to swing around the second rotating connection point 32, so that the end of the lever arm 3 with the third rotating connection point 33 extends or retracts from the bottom of the fork carriage 1, which also causes the wheel set 4 at that end to extend or retract.

[0028] To prevent the load-bearing wheel 42 from extending beyond the bottom of the fork carriage 1 and colliding with the pallet due to the swing of the wheel assembly 4 around the third rotation connection point 33 when the wheel assembly is in the retracted state, this embodiment provides an elastic abutment 5 on the upper end of one of the connecting plates 41 and on both sides of the third rotation connection point 33. The elastic abutment 5 cooperates with the top surface of the fork carriage 1. Of course, elastic abutment 5 can also be provided on both connecting plates 41. In this way, when the wheel assembly 4 retracts into the fork carriage 1, if the wheel assembly 4 is in an inclined state, the elastic abutment at the higher end will first abut against the top surface of the fork carriage 1, causing the lower end to tilt up, until the elastic abutment 5 at both ends of the wheel assembly 4 abuts against the top surface of the fork carriage 1, and finally... Figure 4 As shown, the forces between the two elastic abutment members 5 and the top surface 1 of the fork carriage are roughly equal, thus the entire wheel assembly 4 can maintain a relatively horizontal state. That is, the wheel assembly 4 can be completely retracted within the fork carriage 1. Simultaneously, because the ends of the wheel assembly 4 are constantly subjected to the force of the elastic abutment members 5, it cannot swing freely in the retracted state and therefore cannot extend beyond the bottom of the fork carriage 1, avoiding collision with the pallet. Furthermore, using the elastic abutment members 5 to limit the swing of the wheel assembly 4 prevents collisions between the wheel assembly 4 and the top surface 1 of the fork carriage, making the entire retraction process smoother and preventing damage to the equipment. Figure 3 As shown, when the wheel assembly 4 extends normally out of the bottom of the fork carriage 1 for support, the elastic abutment 5 disengages from the top surface of the fork carriage 1 and does not affect the extension state of the wheel assembly.

[0029] like Figure 5 As shown, the elastic abutment 5 is a leaf spring, comprising an integrally formed mounting plate 51, an elastic plate 52, and an abutment plate 53. The elastic plate 52 is obliquely connected between the mounting plate 51 and the abutment plate 53. The entire elastic abutment has a simple structure. Generally, the mounting plate 51 can be fixedly connected to the connecting plate 41 by bolts. The elastic plate 42 provides effective elasticity, and the abutment plate 53 provides effective contact area with the fork carriage. To avoid interference between the elastic abutment 5 and the existing structure inside the fork carriage 1, the mounting plate 51 and the abutment plate 52 are arranged along the length of the connecting plate 41, that is, the elastic abutment 5 is only installed in the space directly above the connecting plate 41. To prevent the elastic abutment 5 from rotating out of the space directly above the connecting plate 41 and interfering with other structures, two fixing bolts 6 are provided between the mounting plate 51 and the connecting plate 41.

[0030] Furthermore, to ensure the limiting effect of the elastic abutment 5 on both ends of the wheel assembly 4, the abutment piece 53 is closer to the side end of the connecting plate 41 than the mounting piece 51. To ensure that the elastic force on both ends of the wheel assembly 4 is equal, and to keep the wheel assembly 4 as horizontal as possible within the fork carriage 1, the two elastic abutment pieces 5 are symmetrically arranged on both sides of the third rotating connection point 33. Further, considering the weight of the load-bearing wheels 42 themselves, the two load-bearing wheels 42 are symmetrically arranged on both sides of the third rotating connection point 33, thereby avoiding the influence of the load-bearing wheel's weight on the horizontal state of the wheel assembly. Correspondingly, to avoid the influence of the connecting plate 41's weight on the horizontal state of the wheel assembly, the third rotating connection point 33 is located at the middle of the length direction of the connecting plate 41.

[0031] Finally, to prevent the drive linkage 2 from extending beyond the bottom of the fork carriage 1 during push-pull operations, the position of the first rotary connection point 31 is higher than the position of the second rotary connection point 32.

[0032] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A load-bearing wheel horizontal tightening mechanism, comprising a fork carriage, a drive linkage, a lever arm, and a wheel assembly, wherein one end of the lever arm is provided with a first rotating connection point and a second rotating connection point, and the other end is provided with a third rotating connection point; the drive linkage is rotatably connected to the first rotating connection point, the fork carriage is rotatably connected to the second rotating connection point, and the wheel assembly is rotatably connected to the third rotating connection point; the wheel assembly comprises two oppositely arranged connecting plates and two load-bearing wheels disposed between the two connecting plates, characterized in that... At least one connecting plate has elastic abutment members on its upper end and on both sides of the third rotating connection point, and the elastic abutment members cooperate with the top surface of the fork carriage.

2. The bearing wheel horizontal tightening mechanism according to claim 1, characterized in that, The elastic abutment includes an integrally formed mounting plate, an elastic plate, and an abutment plate, with the elastic plate being inclinedly connected between the mounting plate and the abutment plate.

3. The bearing wheel horizontal tightening mechanism according to claim 2, characterized in that, The mounting plate and the contact plate are arranged along the length of the connecting plate.

4. The bearing wheel horizontal tightening mechanism according to claim 3, characterized in that, At least two fixing bolts are provided between the mounting plate and the connecting plate.

5. A horizontal tightening mechanism for a bearing wheel according to claim 3, characterized in that, The abutment piece is closer to the side of the connecting plate than the mounting piece.

6. The bearing wheel horizontal tightening mechanism according to claim 1, characterized in that, The two elastic abutment members are symmetrically arranged on both sides of the third rotation connection point.

7. The bearing wheel horizontal tightening mechanism according to claim 1, characterized in that, The two load-bearing wheels are symmetrically arranged on both sides of the third rotation connection point.

8. The bearing wheel horizontal tightening mechanism according to claim 1, characterized in that, The third rotating connection point is located at the middle of the length of the connecting plate.

9. The bearing wheel horizontal tightening mechanism according to claim 1, characterized in that, The position of the first rotating connection point is higher than the position of the second rotating connection point.

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