Electric tray truck drive

Abstract

The utility model relates to the technical field of vehicle driving devices, and discloses an electric pallet truck driver which comprises a driving support, a driving motor, a transmission mechanism and a driving wheel assembly are installed on the driving support, and the driving motor and the driving wheel assembly are installed on the same side of the driving support. The axis of the driving motor and the axis of the driving wheel assembly are parallel but not collinear, the transmission mechanism is installed on the other side of the driving support, and an end cover arranged outside the transmission mechanism in a covering mode is installed on the driving support. According to the utility model, the wheel axis and the motor axis are not on the same axis by adopting a mode of dismounting from the side surface of the wheel, and the protective cover is additionally arranged, so that the problems of difficulty in installation, easiness in gear damage, easiness in fault due to direct exposure of an electromagnetic brake and the like in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle drive device technical field more specifically relates to a kind of electric pallet truck drive. BACKGROUND

[0002] In the current logistics handling equipment field, electric pallet truck and electric stacker as important material handling tools, are widely used in various warehouse, logistics and industrial production scene. At present, the drive of electric pallet truck and electric stacker on the market mostly adopts motor and wheel coaxial design, this design exposes many drawbacks in practical application.

[0003] From the installation and maintenance point of view, when the wheel needs to be replaced due to wear, since the motor and the wheel are coaxial, it is necessary to remove the motor parts, which is quite cumbersome, and requires professional technicians and specific tools to complete. Moreover, frequent removal and installation of motor parts not only consumes a lot of time and labor cost, but also easily causes damage to the motor and related parts during operation, thereby increasing the equipment failure rate. For example, in some large logistics warehouses, electric pallet trucks are used frequently, and the wheels wear out quickly, so frequent replacement of wheels significantly increases the downtime maintenance time of the equipment, seriously affecting the efficiency of logistics operations.

[0004] In terms of sealing performance, the existing design cannot achieve good sealing. In actual working environment, especially in some dusty factory workshops, or places that may come into contact with liquids such as food processing and chemical storage, dust and liquid can easily enter the gear box through the gap between the wheel and other parts. As a key part of the transmission system of the equipment, the gear box will accelerate the wear and corrosion of the gears once dust and liquid enter. Dust particles can cause abrasion during gear meshing, damaging the precision and smoothness of the gear surface; while liquid can cause the gears to rust, resulting in a decrease in the precision of the gear-to-gear fit, ultimately causing gear damage, reducing the transmission efficiency of the equipment, and even making it impossible to operate normally.

[0005] In addition, the existing design exposes the electromagnetic brake directly without any protective measures, which makes the electromagnetic brake vulnerable to bumps during daily use of the equipment. In narrow warehouse corridors, the pallet truck may collide with shelves, walls, etc. The exposed electromagnetic brake is the first to be hit, and after being hit by external force, the internal structure may be deformed or damaged, affecting the normal performance of the brake. Moreover, in some humid working environments, the electromagnetic brake is also prone to water ingress. Water entering the electromagnetic brake can cause circuit short circuit, rusting of parts, and other problems, thereby causing brake failure, seriously threatening the safe operation of the equipment and the safety of the operator. SUMMARY

[0006] Therefore, the electric pallet truck drive provided by the utility model adopts the wheel side disassembly and assembly mode, the wheel axis and the motor axis are not on the same axis, and a protective cover is additionally installed, so that the problems of installation difficulty, gear damage, direct exposure of the electromagnetic brake and easy failure in the prior art can be solved.

[0007] To achieve the above object, the electric pallet truck drive provided by the utility model comprises a driving support, a driving motor, a transmission mechanism and a driving wheel assembly are installed on the driving support, the driving motor and the driving wheel assembly are installed on the same side of the driving support, the axes of the driving motor and the driving wheel assembly are parallel, the axis of the driving motor is higher than the axis of the driving wheel assembly, the transmission mechanism is installed on the other side of the driving support, and an end cover is installed on the driving support and covers the outside of the transmission mechanism.

[0008] Preferably, the driving wheel assembly comprises a spline shaft and a driving wheel, the driving wheel is fixedly sleeved on one end of the spline shaft away from the driving support, and the spline shaft is rotationally connected with the driving support through bearings seven, shaft sleeves and bearings eight.

[0009] Preferably, the transmission mechanism comprises a three-stage gear, one end of the spline shaft away from the driving wheel passes through the three-stage gear and is rotationally installed on the end cover through a bearing nine, and corresponding ratchets are arranged at the joint positions of the spline shaft and the three-stage gear, so that the spline shaft and the three-stage gear are meshingly connected.

[0010] Preferably, the transmission mechanism further comprises a third transmission assembly, the third transmission assembly comprises a three-stage gear shaft and bearings five and six installed on both ends of the three-stage gear shaft, the three-stage gear shaft is meshingly connected with the three-stage gear, and a two-stage gear is fixedly sleeved on the three-stage gear shaft.

[0011] Preferably, the transmission mechanism further comprises a second transmission assembly, the second transmission assembly comprises a two-stage gear shaft and bearings three and four installed on both ends of the two-stage gear shaft, the two-stage gear shaft is meshingly connected with the two-stage gear, and a one-stage gear is fixedly sleeved on the two-stage gear shaft.

[0012] Preferably, the transmission mechanism further comprises a first transmission assembly, the first transmission assembly comprises a one-stage gear shaft and bearings one and two installed on both ends of the one-stage gear shaft, the one-stage gear shaft is meshingly connected with the one-stage gear, and the one-stage gear shaft and the driving motor are coaxial and synchronously rotatable.

[0013] Preferably, a hole elastic retainer is arranged between the bearing eight and the three-stage gear, and the hole elastic retainer is installed on the driving support.

[0014] Preferably, the third gear and the bearing nine are provided with an elastic shaft baffle, which is installed in a groove on the spline shaft.

[0015] Preferably, the driving motor is provided with a brake at one end away from the driving support.

[0016] Preferably, the driving wheel and the driving support are provided with a dustproof sealing ring one and a dustproof sealing ring two.

[0017] Compared with the prior art, the electric pallet truck drive provided by the utility model has the following beneficial effects:

[0018] 1. Strong motor protection, prolonging service life: the motor is arranged on the top, which is higher than the traditional coaxial structure, effectively reducing the risk of water entering the motor. In a humid environment or accidental splashing, the motor is in a high position, and the probability of water contact is greatly reduced, avoiding problems such as internal short circuit and winding damage, prolonging the service life of the motor. As the core power source of the driving device, the stability and service life of the motor are improved, reducing the overall maintenance frequency and cost of the equipment. In the long run, the equipment downtime caused by motor failure is reduced, and the continuity and efficiency of production operations are improved.

[0019] 2. Optimized electromagnetic brake protection, improved safety and reliability: by adding an electromagnetic brake protection cover (consisting of a driving support, an end cover and a dustproof sealing ring), dust and liquid can be effectively prevented from entering the electromagnetic brake. In a dusty industrial environment or a work scene prone to liquid contact, the protective structure can block dust particles and liquid, preventing the electromagnetic brake from malfunctioning due to impurities. At the same time, the protective cover also has the function of preventing collision, reducing the risk of damage to the electromagnetic brake due to external impact, so that the brake system always maintains a stable and reliable working state, and responds in time when the equipment needs to be braked, effectively ensuring the safety of equipment operation, reducing safety accidents caused by brake failure, and protecting the safety of operators and goods.

[0020] 3. Side wheel disassembly method, reducing maintenance cost and difficulty: the wheel is disassembled from the side, which is more convenient and faster than the traditional coaxial design that requires removing motor parts to replace the wheel. In actual equipment maintenance, maintenance personnel do not need complex tools and professional skills to quickly disassemble and install the wheel, greatly shortening the equipment maintenance time and improving the utilization rate of the equipment. For example, in a logistics warehouse, the interruption time of the carrying operation caused by equipment maintenance can be reduced, and the efficiency of goods carrying can be improved. At the same time, the simplified disassembly process reduces the technical requirements for maintenance personnel, reduces the risk of secondary damage to the equipment caused by improper maintenance operation, and further reduces the maintenance cost of the equipment.

[0021] 4. Improve the overall sealing performance, to protect the transmission system stable: the dustproof sealing ring in the device, the dustproof sealing ring two and the end cover and the driving support gear box sealing structure composed of, effectively prevent dust, sewage and other impurities into the drive cavity and gear box, for the normal operation of the planetary gear part provides a good environment, reduces the impurities on the gear wear and corrosion, to ensure the precise meshing between the gears and transmission efficiency, stable transmission system makes the equipment run more smoothly, reduces the vibration and noise caused by transmission component failure, improve the overall performance and operation comfort of the equipment;

[0022] 5. Improve the versatility and adaptability of the device: the design features of the motor on the wheel non coaxial and side disassembly, so that the drive device has higher versatility on different types of electric pallet trucks and electric stackers, manufacturers can more easily use the drive device when designing and manufacturing different models of equipment, reducing the research and production costs caused by the difference in drive design, at the same time, this design also makes the equipment can better adapt to various complex working environment and working condition requirements, provides more flexible equipment selection scheme for enterprises, improves the market competitiveness of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0024] Figure 1 The structure diagram of the assembled electric pallet truck drive of the present application;

[0025] Figure 2 The structure explosion diagram of the drive support and drive wheel assembly of the present application;

[0026] Figure 3 The structure explosion diagram of the transmission mechanism and end cover of the present application, wherein the connection between and Figure 2 The connection between and Figure 2 .

[0027] Explanation of reference signs: 1-bolt one; 2-driving wheel; 3-counter sunk screw; 4-brake; 5-driving motor; 6-locking nut; 7-cylindrical pin; 8-spline shaft; 9-dustproof sealing ring one; 10-dustproof sealing ring two; 11-driving support; 12-bearing one; 13-first stage gear shaft; 14-bearing two; 15-bearing three; 16-first stage gear; 17-flats; 18-second stage gear shaft; 19-bearing four; 20-bearing five; 21-third stage gear shaft; 22-second stage gear; 23-flats set; 24-bearing six; 25-bearing seven; 26-bush; 27-bearing eight; 28-hole elastic baffle ring; 29-third stage gear; 30-axle elastic baffle ring; 31-bearing nine; 32-end cover; 33-bolt two. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Please refer to the drawings Figures 1-3 The utility model discloses an electric pallet truck drive.

[0030] The utility model provides an electric pallet truck drive, including driving support 11 and install on driving support 11 driving motor 5, transmission mechanism and driving wheel subassembly. Driving support 11 is fixed with frame, and carries driving motor 5, transmission mechanism and driving wheel subassembly and so on each spare part, driving motor 5 and driving wheel subassembly install on the same side of driving support 11, the axis of driving motor 5 and driving wheel subassembly is parallel and the axis of driving motor 5 is higher than and the axis of driving wheel subassembly, transmission mechanism installs on the other side of driving support 11, and driving support 11 is installed with the end cover 32 of the cover of transmission mechanism outside, driving motor 5 is fixed on driving support 11 and generates torque, output power, and the end of driving motor 5 away from driving support 11 is installed with brake 4, and brake 4 is connected with the transmission shaft of driving motor 5, can limit the rotation of transmission shaft.

[0031] Driving motor 5 and driving support 11 keep hole position alignment and assemble, and are fastened with locking nut 6;Brake 4 and driving motor 5 keep hole position alignment and assemble, and are fastened with counter sunk screw 3.

[0032] The spline shaft 8 is assembled with the driving wheel 2 in hole position alignment, and is fastened with the bolt 1, to form a driving wheel assembly. The dustproof sealing ring 1 is assembled to the A face of the driving wheel 2, and the dustproof sealing ring 2 is assembled to the B face of the driving support 11. The dustproof sealing ring 1 and the dustproof sealing ring 2 play a sealing role between the driving inner cavity and the outside world, to prevent dust, sewage and other impurities from entering.

[0033] The bearing 7, the shaft sleeve 26 and the bearing 8 are sequentially assembled to the C face of the spline shaft 8, the bearing 9 is assembled to the G face of the spline shaft 8, and the bearing 7, the bearing 8 and the bearing 9 play a supporting role for the spline shaft 8. The hole elastic stop ring 28 is assembled into the D face groove of the driving support 11.

[0034] The transmission mechanism comprises a first transmission component assembly, a second transmission component assembly, a third transmission component assembly and a third gear 29.

[0035] The third gear 29 is assembled with the spline shaft 8, the shaft elastic stop ring 30 is installed in the groove on the spline shaft 8, the hole elastic stop ring 28 limits the axial displacement of the bearing 7, the shaft sleeve 26 and the bearing 8, and the shaft elastic stop ring 30 limits the axial displacement of the spline shaft 8. The third gear 29 drives the spline shaft 8 to rotate through the spline meshing with the spline shaft 8, and the spline shaft 8 also drives the driving wheel 2 to rotate.

[0036] The bearing 1 and the bearing 2 are installed on the first gear shaft 13 in interference fit, to form a first transmission component assembly. The bearing 1 and the bearing 2 play a supporting role for the first gear shaft 13. The first gear shaft 13 is connected with the driving motor 5, and the driving motor 5 drives the first gear 16 to rotate.

[0037] The first gear 16 is interference fitted with the E face of the second gear shaft 18, the bearing 3 and the bearing 4 are installed on the second gear shaft 18 in interference fit, and the flat key 17 is clearance fitted between the first gear 16 and the second gear shaft 18, to form a second transmission component assembly. The first gear 16 is connected with the second gear shaft 18 through the flat key 17, to drive the second gear shaft 18 to rotate. The second gear shaft 18 drives the second gear 22 to rotate. The bearing 3 and the bearing 4 play a supporting role for the second gear shaft 16.

[0038] The second gear 22 is interference fitted with the F face of the third gear shaft 21, the bearing 5 and the bearing 6 are installed on the third gear shaft 21 in interference fit, and the flat key group 23 is clearance fitted between the third gear shaft 21 and the second gear 22, to form a third transmission component assembly. The second gear 22 drives the third gear shaft 21 to rotate through the flat key group 23, and the third gear shaft 21 drives the third gear 29 to rotate. The bearing 5 and the bearing 6 play a supporting role for the third gear shaft 21.

[0039] It should be noted that the bearing one 12, the bearing three 15, the bearing five 20 are in interference fit with the driving support 11, the bearing two 14, the bearing four 19, the bearing six 24, the bearing nine 31 are in interference fit with the end cover 32, the end cover 32 supports the bearing two 14, the bearing four 19, the bearing six 24, the bearing nine 31, the end cover 32 is assembled with the driving support 11, and the driving support 11 is matched to form a gear box, plays a sealing role, the end cover 32 and the driving support 11 are positioned by the cylindrical pin 7, fastened by the bolt two 33, the cylindrical pin 7 positions the driving support 11 and the end cover 32, and the bolt two 33 fastens the driving support 11 and the end cover 32.

[0040] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric pallet truck drive comprising a drive bracket (11), characterized in that, The driving support (11) is provided with a driving motor (5), a transmission mechanism and a driving wheel assembly, the driving motor (5) and the driving wheel assembly are installed on the same side of the driving support (11), the axes of the driving motor (5) and the driving wheel assembly are parallel, the axis of the driving motor (5) is higher than the axis of the driving wheel assembly, the transmission mechanism is installed on the other side of the driving support (11), and an end cover (32) covering the transmission mechanism is installed on the driving support (11).

2. The electric pallet jack drive of claim 1, wherein, The driving wheel assembly comprises a spline shaft (8) and a driving wheel (2), the driving wheel (2) is fixedly sleeved on one end of the spline shaft (8) away from the driving support (11), and the spline shaft (8) is rotationally connected with the driving support (11) through a bearing seven (25), a shaft sleeve (26) and a bearing eight (27).

3. The electric pallet jack drive of claim 2, wherein, The transmission mechanism comprises a three-stage gear (29), one end of the spline shaft (8) away from the driving wheel (2) passes through the three-stage gear (29) and is rotationally installed on the end cover (32) through a bearing nine (31), and corresponding ratchets are arranged at the joint positions of the spline shaft (8) and the three-stage gear (29) to enable the spline shaft (8) and the three-stage gear (29) to be in meshing connection.

4. The electric pallet jack drive of claim 3, wherein, The transmission mechanism further comprises a third transmission assembly, the third transmission assembly comprises a three-stage gear shaft (21) and bearings five (20) and six (24) installed on both ends of the three-stage gear shaft (21), the three-stage gear shaft (21) is in meshing connection with the three-stage gear (29), and a two-stage gear (22) is fixedly sleeved on the three-stage gear shaft (21).

5. The electric pallet jack drive of claim 4, wherein, The transmission mechanism further comprises a second transmission assembly, the second transmission assembly comprises a two-stage gear shaft (18) and bearings three (15) and four (19) installed on both ends of the two-stage gear shaft (18), the two-stage gear shaft (18) is in meshing connection with the two-stage gear (22), and a one-stage gear (16) is fixedly sleeved on the two-stage gear shaft (18).

6. The electric pallet jack drive of claim 5, wherein, The transmission mechanism further comprises a first transmission assembly, the first transmission assembly comprises a one-stage gear shaft (13) and bearings one (12) and two (14) installed on both ends of the one-stage gear shaft (13), the one-stage gear shaft (13) is in meshing connection with the one-stage gear (16), and the one-stage gear shaft (13) and the driving motor (5) are coaxial and synchronously rotatable.

7. The electric pallet jack drive of claim 3, wherein, A hole elastic retainer (28) is arranged between the bearing eight (27) and the three-stage gear (29), and the hole elastic retainer (28) is installed on the driving support (11).

8. The electric pallet jack drive of claim 3, wherein, An axle elastic retainer (30) is arranged between the three-stage gear (29) and the bearing nine (31), and the axle elastic retainer (30) is installed in a groove on the spline shaft (8).

9. The electric pallet jack drive of claim 1, wherein, A brake (4) is installed on one end of the driving motor (5) away from the driving support (11).

10. The electric pallet jack drive of claim 2, wherein, Dustproof sealing rings one (9) and two (10) are arranged between the driving wheel (2) and the driving support (11).

Images