Auxiliary wheel assembly for tray truck

Abstract

The utility model belongs to the technical field of forklift assembly parts, and particularly discloses an auxiliary wheel assembly for a pallet truck, which comprises a support welding part and an auxiliary wheel main body arranged on the inner side of the support welding part, dustproof end covers are arranged at two ends of the auxiliary wheel main body, and spacer bushes are arranged between the support welding part and the dustproof end covers. The pin shaft penetrates through the support welding part, the spacer bush, the dustproof end cover and the auxiliary wheel body, the two ends of the pin shaft are locked through self-locking nuts, the connecting shaft is arranged above the support welding part, the mounting base is arranged on the outer side of the connecting shaft in a sleeving mode, the double-row conical bearing is arranged between the mounting base and the connecting shaft, and the gasket is arranged in the middle of the mounting base. The gasket is fixed to a connecting shaft of the support welding-on through a screw, and the dustproof cover is arranged above the installation base in a sleeving mode. The dustproof cover above the mounting seat can effectively prevent external sundries from entering the double-row conical bearing, and the dustproof end cover can prevent the external sundries from entering the auxiliary wheel main body.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift fittings, in particular to an auxiliary wheel assembly for a pallet truck. Background Technique

[0002] An electric pallet truck is also called an electric pallet stacker or an electric transporter. It is suitable for heavy load and long-time cargo transfer working conditions, can greatly improve the cargo handling efficiency, reduce the labor intensity, and is a light and small storage industrial vehicle with wide application at home and abroad and great market potential.

[0003] An electric pallet truck generally uses a battery, a motor and a hydraulic pump as power components, is centrally controlled by an operating handle, has a standing driving mode, uses an auxiliary wheel assembly as a component for maintaining the balance of the vehicle body, has low noise and low pollution, and can operate in places such as shopping malls, supermarkets, warehouses, freight yards, workshops, etc.

[0004] The current auxiliary wheel installation scheme has the following problems: 1. During the operation of the vehicle, the auxiliary wheel is inevitably impacted due to uneven ground, resulting in easy damage to the mounting seat; 2. The position connected to the mounting seat is prone to loosening of the double-row tapered roller bearing due to vehicle vibration, causing the auxiliary wheel to fall off; 3. During the operation of the vehicle, sand and sundries are easily introduced into the bearing, reducing the service life of the auxiliary wheel. Content of the Utility Model

[0005] The purpose of the utility model is to provide an auxiliary wheel assembly for a pallet truck to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: an auxiliary wheel assembly for a pallet truck, including a bracket welding and an auxiliary wheel main body arranged inside the bracket welding. Dust-proof end caps are arranged at both ends of the auxiliary wheel main body. A spacer sleeve is arranged between the bracket welding and the dust-proof end caps. A pin shaft penetrates through the bracket welding, the spacer sleeve, the dust-proof end caps and the auxiliary wheel main body, and both ends of the pin shaft are locked by self-locking nuts;

[0007] A connecting shaft is arranged above the bracket welding. A mounting seat is sleeved outside the connecting shaft. A double-row tapered roller bearing is arranged between the mounting seat and the connecting shaft. A washer is arranged in the middle of the mounting seat. The washer is fixed to the connecting shaft of the bracket welding by screws. A dust-proof cover is sleeved above the mounting seat.

[0008] Preferably, the dust-proof cover above the mounting seat can effectively prevent external sundries from entering the double-row tapered roller bearing, and the dust-proof end cap can prevent external sundries from entering the auxiliary wheel main body.

[0009] Preferably, the double-row tapered roller bearing is connected to the washer by screws to ensure the fixing effect of the double-row tapered roller bearing and prevent the double-row tapered roller bearing from loosening at the same time.

[0010] Preferably, the mounting seat is formed by casting to ensure the reliability of connection with the vehicle frame.

[0011] Preferably, the sides of the mounting seat are all arc-shaped, which increases the aesthetics while reducing the sharp corners.

[0012] Preferably, mounting holes are provided at positions of the mounting seat close to the corners. The mounting holes are mainly provided to facilitate the installation of this device.

[0013] Preferably, an annular groove is provided at a position of the auxiliary wheel main body close to the outside, which is convenient for installing in cooperation with the dust-proof end cover.

[0014] Preferably, a gap of 0.2 - 0.3 mm is provided between the axial end face of the double-row tapered roller bearing and the washer.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The structure of the present utility model is simple and the assembly is convenient. The casting mounting seat is adopted to ensure the strength. The double-row tapered roller bearing is connected with the washer by screws, which not only ensures the fixation of the double-row tapered roller bearing, but also avoids the risk that the double-row tapered roller bearing becomes loose due to the vibration generated during the long-term operation of the auxiliary wheel assembly on the whole machine. The dust-proof end cover and the dust-proof cover can effectively prevent sediment and sundries from entering the bearing or the auxiliary wheel main body, and prolong the service life of the auxiliary wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the internal structure of the auxiliary wheel main body of the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the mounting seat of the present utility model;

[0019] Figure 3 is a schematic top view structure diagram of the present utility model;

[0020] Figure 4 is of the present utility model Figure 2 The enlarged structure diagram of part A in.

[0021] In the figure: 1. Auxiliary wheel main body; 2. Dust-proof end cover; 3. Sleeve; 4. Pin shaft; 5. Self-locking nut; 6. Bracket weldment; 7. Mounting seat; 8. Double-row tapered roller bearing; 9. Washer; 10. Screw; 11. Dust-proof cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The present utility model provides a technical solution: an auxiliary wheel assembly for a pallet truck, which includes an auxiliary wheel main body 1, a dust-proof end cover 2, a spacer sleeve 3, a pin shaft 4, a self-locking nut 5, a bracket weldment 6, a mounting seat 7, a double-row tapered roller bearing 8, a washer 9, a screw 10, and a dust-proof cover 11.

[0026] Embodiment 1

[0027] Please refer to Figure 1-2 , this embodiment provides an auxiliary wheel assembly for a pallet truck, which is mainly used for dust-proofing the auxiliary wheel main body. Among them:

[0028] The bracket weldment 6 is provided with the auxiliary wheel main body 1 on the inner side of the bracket weldment 6. Dust-proof end covers 2 are provided at both ends of the auxiliary wheel main body 1. A spacer sleeve 3 is provided between the bracket weldment 6 and the dust-proof end cover 2. The pin shaft 4 passes through the bracket weldment 6, the spacer sleeve 3, the dust-proof end cover 2, and the auxiliary wheel main body 1, and both ends of the pin shaft 4 are locked by setting self-locking nuts 5.

[0029] When in use, the auxiliary wheel main body 1 is connected to the bracket weldment 6 by the pin shaft 4, and dust-proof end covers 2 are installed at both ends, which can effectively prevent sundries from entering the bearing of the auxiliary wheel main body 1 during the use of the forklift, and extend the service life of the auxiliary wheel assembly.

[0030] Example Two

[0031] Please refer to Figure 1-4 , this embodiment provides an auxiliary wheel assembly for a pallet truck, which is mainly used for dust prevention of a double-row tapered roller bearing, where:

[0032] There is a connecting shaft 12 above the bracket weldment 6. The mounting seat 7 is sleeved outside the connecting shaft 12. The double-row tapered roller bearing 8 is arranged between the mounting seat 7 and the connecting shaft 12. A washer 9 is arranged in the middle of the mounting seat 7. The washer 9 is fixed to the connecting shaft 12 of the bracket weldment 6 by screws 10. A dust cover 11 is sleeved above the mounting seat 7.

[0033] The dust cover 11 above the mounting seat 7 can effectively prevent external debris from entering the double-row tapered roller bearing 8, and the dust-proof end cover 2 can prevent external debris from entering the auxiliary wheel body 1. The double-row tapered roller bearing 8 is connected to the washer 9 by screws 10 to ensure the fixing effect of the double-row tapered roller bearing 8 and prevent the double-row tapered roller bearing 8 from loosening at the same time.

[0034] Furthermore, the mounting seat 7 is formed by casting to ensure the reliability of connection with the vehicle frame.

[0035] Furthermore, the sides of the mounting seat 7 are all arc-shaped, which increases the aesthetics while reducing the sharp corners.

[0036] Furthermore, mounting holes are provided at positions of the mounting seat 7 close to the corners. The mounting holes are mainly provided to facilitate the installation of this device.

[0037] Furthermore, an annular groove is provided at a position of the auxiliary wheel body 1 close to the outside, which is convenient for the installation of the dust-proof end cover 2.

[0038] Furthermore, a gap of 0.2 - 0.3 mm is provided between the axial end faces of the double-row tapered roller bearing 8 and the washer 9.

[0039] When the double-row tapered roller bearing 8 is connected to the washer 9 by screws 10, a gap of 0.2 - 0.3 mm is ensured between the axial end face of the double-row tapered roller bearing 8 and the bracket weldment 6. This not only ensures the fixation of the double-row tapered roller bearing 8 but also avoids the risk of the double-row tapered roller bearing 8 loosening due to vibration during long-term operation of the auxiliary wheel assembly on the whole machine. There is a dust cover 11 on the upper end face of the auxiliary wheel assembly, which can effectively reduce the entry of debris into the double-row tapered roller shaft.

[0040] Example Three

[0041] Based on Embodiment 1 and Embodiment 2, the auxiliary wheel is installed on the material handling vehicle at the construction site. Since there are many dust and impurities at the construction site, the auxiliary wheels of ordinary handling vehicles are prone to blockage. When in use, the main body 1 of the auxiliary wheel is welded to the bracket 6 by a pin shaft 4, and dust-proof end caps 2 are installed at both ends, which can effectively prevent sundries from entering the bearings of the auxiliary wheel during the use of the forklift, and extend the service life of the auxiliary wheel assembly. When the double-row tapered roller bearing 8 is connected to the washer 9 with a screw 10, a gap of 0.2 - 0.3 mm is ensured between the shaft end face in the bracket weldment 6 and the double-row tapered roller bearing 8, which not only ensures the fixation of the double-row tapered roller bearing 8, but also avoids the risk of the double-row tapered roller bearing 8 becoming loose due to vibration generated during long-term operation of the auxiliary wheel assembly on the whole machine. There is a dust-proof cover 11 on the upper end face of the auxiliary wheel assembly, which can effectively reduce the entry of sundries into the double-row tapered shaft.

[0042] Embodiment 4

[0043] Based on Embodiment 1 and Embodiment 2, the auxiliary wheel is installed on the side of the baby carriage as a support component. When in use, the auxiliary wheel can not only play a role in preventing tipping, but also the provided dust-proof end cap 2 can effectively prevent external impurities from entering the bearing of the auxiliary wheel, accelerating the wear of the auxiliary wheel. When the double-row tapered roller bearing 8 is connected to the washer 9 with a screw 10, a gap of 0.2 - 0.3 mm is ensured between the shaft end face in the bracket weldment 6 and the double-row tapered roller bearing 8, which not only ensures the fixation of the double-row tapered roller bearing 8, but also avoids the risk of the double-row tapered roller bearing 8 becoming loose due to vibration generated during long-term operation of the auxiliary wheel assembly on the whole machine. The dust-proof cover 11 can effectively reduce the entry of sundries into the double-row tapered shaft. Therefore, the auxiliary wheel of the present utility model can also be applied to baby carriages.

[0044] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An auxiliary wheel assembly for a pallet truck, characterized in that: It includes a bracket welding joint (6) and an auxiliary wheel body (1) arranged inside the bracket welding joint (6). Dust-proof end caps (2) are arranged at both ends of the auxiliary wheel body (1). A spacer sleeve (3) is arranged between the bracket welding joint (6) and the dust-proof end cap (2). A pin shaft (4) penetrates through the bracket welding joint (6), the spacer sleeve (3), the dust-proof end cap (2) and the auxiliary wheel body (1), and both ends of the pin shaft (4) are locked by setting self-locking nuts (5). A connecting shaft (12) is arranged above the bracket welding joint (6). A mounting seat (7) is sleeved outside the connecting shaft (12), and the mounting seat (7) is integrally formed by casting. A double-row tapered roller bearing (8) is arranged between the mounting seat (7) and the connecting shaft (12). A washer (9) is arranged in the middle of the mounting seat (7). A preset gap of 0.2-0.3 mm is provided between the axial end faces of the double-row tapered roller bearing (8) and the washer (9). The washer (9) is fixed to the connecting shaft (12) of the bracket welding joint (6) by screws (10). A dust-proof cover (11) is sleeved above the mounting seat (7).

2. The auxiliary wheel assembly for a pallet truck according to claim 1, characterized in that: The sides of the mounting seat (7) are all arc-shaped.

3. The auxiliary wheel assembly for a pallet truck according to claim 1, characterized in that: Mounting holes are formed at positions of the mounting seat (7) close to the corners.

4. The auxiliary wheel assembly for a pallet truck according to claim 1, characterized in that: An annular groove is provided at a position of the auxiliary wheel body (1) close to the outside.

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