Permanent magnet electric fork drive axle
By improving the structural design of the permanent magnet electric forklift drive axle and utilizing the wheel hub bolt connection and sealing system, the problem of insufficient starting torque is solved, achieving efficient and energy-saving forklift starting performance.
Patent Information
- Application Number
- CN202422727733.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-11-08
AI Technical Summary
The existing permanent magnet electric forklift drive axle has low starting torque and insufficient power to quickly overcome load inertia, resulting in slow start or uneven acceleration of the forklift, especially under heavy loads or complex road conditions, which affects work efficiency.
A permanent magnet electric fork drive axle was designed, which includes a bridge housing, right brake assembly, left brake assembly and half-shaft assembly. The half-shaft assembly is connected by hub bolts and hub nuts, and is sealed using skeleton oil seals, O-rings and other components. Tapered roller bearings provide support, and breather plugs balance air pressure to ensure power transmission and braking reliability.
It achieves high power density, high efficiency, large starting torque, small overall size and light weight, reduces drive weight, and improves energy saving and starting performance.
Smart Images
Figure CN223340382U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of permanent magnet electric fork drive bridges, in particular to a permanent magnet electric fork drive bridge. Background Art
[0002] In forklifts with a load range of 3 to 3.5 tons, the permanent magnet electric fork drive axle is an important component for electric forklifts. This drive axle uses a permanent magnet motor as a power source and has the advantages of high efficiency, energy saving, and environmental protection.
[0003] At present, the starting torque of the permanent magnet electric fork drive axle in the existing technology is small, and the power provided by the permanent magnet electric fork drive axle may not be enough to quickly overcome the inertia of the load, resulting in slow start-up or uneven acceleration of the forklift. In the case of heavy loads or complex road conditions, the forklift may be difficult to start quickly, thereby affecting work efficiency. In view of this, we propose a permanent magnet electric fork drive axle. Utility Model Content
[0004] The main purpose of the utility model is to provide a permanent magnet electric fork drive bridge, which can solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model proposes a permanent magnet electric fork drive axle, which includes a bridge housing, a right brake assembly, a left brake assembly and a half-axle assembly. The right brake assembly and the left brake assembly are fixed to the bridge housing by fasteners such as brake locating bolts and cylindrical pins.
[0006] Preferably, hub bolts and hub nuts are respectively installed at both ends of the bridge housing, and the hub bolts and hub nuts are detachably connected to the wheel hub. The half-shaft assembly includes a left half-shaft and a right half-shaft, and the left half-shaft and the right half-shaft are respectively detachably connected to the bridge housing through half-shaft bolts.
[0007] Preferably, a first tapered roller bearing, a second tapered roller bearing, a first skeleton oil seal and a second skeleton oil seal are provided inside the bridge housing.
[0008] Preferably, the right brake assembly and the left brake assembly are both provided with a brake drum, and the brake drum is detachably connected to the wheel hub via a hexagonal nut.
[0009] Preferably, the bridge housing is provided with a hexagonal plug, a half-shaft gasket, a small round nut, a retaining washer, a retaining ring, an O-type rubber sealing ring, a spring washer, a brake stud, a vent plug, an oil seal retaining ring and a bridge housing gasket.
[0010] Preferably, a brake cable is provided under the axle housing to transmit power to the wheel hub through the left and right half-shafts. The left and right half-shafts are connected and fixed to the wheel hub by wheel hub bolts and wheel hub nuts to ensure that power can be effectively transmitted, thereby causing the wheel hub to drive the wheel to rotate. When braking is required, the left brake assembly and the right brake assembly are operated to generate friction in the brake drum, thereby stopping the wheel from rotating. The left brake assembly and the right brake assembly are positioned and installed on the axle housing by brake locating bolts and other components, thereby ensuring the reliability and stability of the braking device. The connections between the half-shaft, the right half-shaft and the bridge housing are sealed with skeleton oil seal 1, skeleton oil seal 2, O-type rubber sealing ring and other components, so as to effectively prevent the leakage of lubricating oil and the entry of external impurities. The tapered roller bearing 1 and tapered roller bearing 2 provide support for related components, thereby ensuring the normal operation of the device. At the same time, the setting of fastening the left half-shaft and the right half-shaft and other components with small round nuts, retaining washers and other components can effectively prevent the left half-shaft and the right half-shaft from loosening. The setting of the air vent can be used to balance the air pressure inside the device to ensure the stability of the internal environment of the device.
[0011] The utility model provides a permanent magnet electric fork drive axle, which has the following beneficial effects:
[0012] (1) The permanent magnet electric fork drive axle transmits power to the wheel hub through the left and right half shafts. The left and right half shafts are connected and fixed to the wheel hub by wheel hub bolts and wheel hub nuts to ensure that power can be effectively transmitted, so that the wheel hub drives the wheel to rotate. When braking is required, the left brake assembly and the right brake assembly are operated to generate friction to stop the wheel from rotating. The left brake assembly and the right brake assembly are positioned and installed on the axle housing by brake positioning bolts and other components, thereby ensuring the reliability and stability of the braking device.
[0013] (2) The permanent magnet electric fork drive axle uses skeleton oil seal 1, skeleton oil seal 2, O-type rubber seal and other components to seal at the connection between the left half shaft, the right half shaft and the bridge housing, thereby effectively preventing the leakage of lubricating oil and the entry of foreign matter. The tapered roller bearing 1 and the tapered roller bearing 2 provide support for the relevant components, thereby ensuring the normal operation of the device. At the same time, the setting of fastening the left half shaft and the right half shaft by small round nuts, retaining washers and other components can effectively prevent the left half shaft and the right half shaft from loosening. The setting of the air vent plug can be used to balance the air pressure inside the device to ensure the stability of the internal environment of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of some devices of this utility model Figure 1 ;
[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of some devices of this utility model Figure 2 ;
[0018] Figure 4 For this utility model Figure 2 Schematic diagram of the structure in the middle B direction;
[0019] Figure 5 This is a schematic diagram of the structure of some devices of this utility model Figure 1 ;
[0020] Figure 6 This is a schematic diagram of the structure of some devices of this utility model Figure 2 ;
[0021] Figure 7 This is a schematic diagram of the structure of some devices of this utility model Figure 3 .
[0022] Description of Figure Numbers:
[0023] 1. Right brake assembly; 2. Axle housing; 3. Hexagon socket blocking block; 4. Brake locating bolt; 5. Left brake assembly; 6. Brake drum; 7. Hexagonal nut; 8. Wheel hub; 9. Wheel hub bolt; 10. Wheel hub nut; 11. Axle shaft bolt; 12. Axle shaft gasket; 13. Left axle shaft; 14. Small round nut; 15. Backstop washer; 16. Retaining ring; 17. O-ring; 18. Skeleton oil seal (one); 19. Tapered roller bearing (one); 20. Tapered roller bearing (two); 21. Skeleton oil seal (two); 22. Spring washer; 23. Brake stud; 24. Cylindrical pin; 25. Breather plug; 26. Oil seal retaining ring; 27. Right axle shaft; 28. Axle housing gasket; 29. Brake cable.
[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0026] See also Figure 1-Figure 7 The utility model proposes a permanent magnet electric fork drive axle, including a bridge housing 2, a right brake assembly 1, a left brake assembly 5 and a half-shaft assembly. The right brake assembly 1 and the left brake assembly 5 are fixed to the bridge housing 2 by fasteners such as brake positioning bolts 4 and cylindrical pins 24.
[0027] In the embodiment of the present utility model, in order to make the permanent magnet electric fork drive axle operate better, specifically, the two ends of the bridge housing 2 are respectively installed with a hub bolt 9 and a hub nut 10, the hub bolt 9 and the hub nut 10 are detachably connected with the hub 8, the half-shaft assembly includes a left half-shaft 13 and a right half-shaft 27, the left half-shaft 13 and the right half-shaft 27 are detachably connected to the bridge housing 2 by the half-shaft bolt 11, and the bridge housing 2 is provided with a tapered roller bearing 19, a tapered roller bearing 20, a skeleton oil seal 18 and a skeleton oil seal 21, which together constitute a bearing and sealing system, thereby ensuring the permanent magnet electric fork To ensure the stability and sealing of the rotating parts of the drive axle during operation, the brake assembly 1 and the left brake assembly 5 are both equipped with a brake drum 6, which is detachably connected to the wheel hub 8 through a hexagonal nut 7. The bridge housing 2 is provided with a hexagonal plug 3, a half-shaft pad 12, a small round nut 14, a retaining washer 15, a retaining ring 16, an O-ring rubber sealing ring 17, a spring washer 22, a brake stud 23, a breather plug 25, an oil seal retaining ring 26 and a bridge housing pad 28. The breather plug 25 is used to discharge the gas inside the bridge housing 2, and the oil seal retaining ring 26 is used to prevent the lubricating oil from leaking from the gap of the bridge housing 2.
[0028] Furthermore, a brake cable 29 is provided under the bridge housing 2, which transmits power to the wheel hub 8 through the left half shaft 13 and the right half shaft 27. The left half shaft 13, the right half shaft 27 and the wheel hub 8 are connected and fixed by the wheel hub bolt 9 and the wheel hub nut 10 to ensure that power can be effectively transmitted, so that the wheel hub 8 drives the wheel to rotate. When braking is required, the brake drum 6 generates friction by operating the left brake assembly 5 and the right brake assembly 1, so that the wheel stops rotating. The left brake assembly 5 and the right brake assembly 1 are positioned and installed on the bridge housing 2 by the brake positioning bolts 4 and other components, so as to ensure the reliability and stability of the braking device. The skeleton oil seal 18 and the skeleton oil seal 21 are used at the connection between the left half shaft 13, the right half shaft 27 and the bridge housing 2 and other components. , O-type rubber sealing ring 17 and other components are sealed, thereby effectively preventing the leakage of lubricating oil and the entry of external impurities, and supporting the relevant components is provided by tapered roller bearing 19 and tapered roller bearing 2 20, thereby ensuring the normal operation of the device, and at the same time, the small round nut 14, the retaining washer 15 and other components are fastened to the left half shaft 13 and the right half shaft 27 and other components. This setting can effectively prevent the left half shaft 13 and the right half shaft 27 from loosening, and the setting of the air breather plug 25 can be used to balance the air pressure inside the device to ensure the stability of the internal environment of the device. At the same time, through this series of settings, the device as a whole can have the characteristics of high power density, small characteristic signal, high efficiency and large starting torque, and the overall size of the device is small and light, which effectively reduces the weight of the drive itself and is more energy-efficient.
[0029] In the present invention, when in use, power is transmitted to the wheel hub 8 through the left half shaft 13 and the right half shaft 27. The left half shaft 13, the right half shaft 27 and the wheel hub 8 are connected and fixed by the wheel hub bolt 9 and the wheel hub nut 10 to ensure that power can be effectively transmitted, so that the wheel hub 8 drives the wheel to rotate. When braking is required, the left brake assembly 5 and the right brake assembly 1 are operated to generate friction force on the brake drum 6, so that the wheel stops rotating. The left brake assembly 5 and the right brake assembly 1 are positioned and installed on the bridge housing 2 by the brake positioning bolts 4 and other components, so as to ensure the reliability and stability of the braking device. At the same time, the left half shaft 13 and the right half shaft 27 are connected and fixed to the wheel hub 8 by the wheel hub bolt 9 and the wheel hub nut 10 to ensure that power can be effectively transmitted, so that the wheel hub 8 drives the wheel to rotate. When braking is required, the left brake assembly 5 and the right brake assembly 1 are operated to generate friction force on the brake drum 6, so that the wheel stops rotating. The connection between the half shaft 27 and the bridge housing 2 and other components is sealed using skeleton oil seal 18, skeleton oil seal 21, O-type rubber sealing ring 17 and other components, thereby effectively preventing the leakage of lubricating oil and the entry of external impurities. The tapered roller bearing 19 and tapered roller bearing 20 provide support for related components, thereby ensuring the normal operation of the device. At the same time, the setting of fastening to the left half shaft 13 and the right half shaft 27 and other components through the small round nut 14, the retaining washer 15 and other components can effectively prevent the left half shaft 13 and the right half shaft 27 from loosening. The setting of the air vent 25 can be used to balance the air pressure inside the device to ensure the stability of the internal environment of the device.
[0030] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A permanent magnet electric fork drive axle, comprising a bridge housing (2), a right brake assembly (1), a left brake assembly (5) and a half-axle assembly, characterized in that: The right brake assembly (1) and the left brake assembly (5) are fixed to the bridge housing (2) via fasteners such as brake positioning bolts (4) and cylindrical pins (24).
2. The permanent magnet electric fork drive axle according to claim 1, characterized in that: Hub bolts (9) and hub nuts (10) are respectively installed at both ends of the bridge housing (2), and the hub bolts (9) and hub nuts (10) are detachably connected to the hub (8). The half-shaft assembly includes a left half-shaft (13) and a right half-shaft (27), and the left half-shaft (13) and the right half-shaft (27) are detachably connected to the bridge housing (2) via half-shaft bolts (11).
3. The permanent magnet electric fork drive axle according to claim 1, characterized in that: The bridge housing (2) is internally provided with a tapered roller bearing 1 (19), a tapered roller bearing 2 (20), a skeleton oil seal 1 (18) and a skeleton oil seal 2 (21).
4. The permanent magnet electric fork drive axle according to claim 2, characterized in that: The right brake assembly (1) and the left brake assembly (5) are both provided with a brake drum (6), and the brake drum (6) is detachably connected to the wheel hub (8) via a hexagonal nut (7).
5. The permanent magnet electric fork drive axle according to claim 1, characterized in that: The bridge housing (2) is provided with a hexagonal plug (3), a half-shaft washer (12), a small round nut (14), a back-off washer (15), a retaining ring (16), an O-type rubber sealing ring (17), a spring washer (22), a brake stud (23), a vent plug (25), an oil seal retaining ring (26) and a bridge housing washer (28).
6. The permanent magnet electric fork drive axle according to claim 1, characterized in that: A brake cable (29) is provided below the bridge housing (2).