Gearbox for electric moped

Abstract

The utility model discloses a gearbox for an electric moped, which relates to the technical field of electric mopeds and comprises a speed change shell, an output shell is arranged on the left side of the speed change shell, two clamping grooves are formed in the top of the speed change shell, a shell cover is arranged at the top of the speed change shell, and two clamping blocks matched with the clamping grooves are fixedly connected to the bottom of the shell cover. A sealing cover is rotated anticlockwise, the sealing cover is taken out from a liquid injection hole, a loading box is filled with lubricating oil, then a liquid suction pipe is sucked through a first liquid suction pump, the lubricating oil in the loading box is sucked, and finally the lubricating oil is injected between a first gear and a second gear through a liquid outlet pipe. The redundant lubricating oil flows into the bottom of the speed change shell after being filtered by the filter screen, and then the redundant lubricating oil in the speed change shell is pumped back into the loading box by sucking the L-shaped recovery pipe through the second infusion pump; therefore, the bad conditions that the first gear and the second gear cannot be used due to lack of lubricating oil, the lubricating oil is wasted and the cost is increased due to overlong use time can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electric assisted vehicles, in particular to a gearbox for an electric assisted vehicle. Background Technique

[0002] The gearbox mainly refers to the gearbox of an electric assisted vehicle, which is divided into two types: manual and automatic. The manual gearbox is mainly composed of gears and shafts, and different gear combinations are used to produce speed change and torque change; while the automatic transmission AT is composed of a hydraulic torque converter, planetary gears, a hydraulic variable pitch system and a hydraulic control system. The speed change and torque change are achieved through the way of hydraulic transmission and gear combination.

[0003] However, when most electric assisted vehicle gearboxes are in use, it is often impossible to directly inject lubricating oil into the gears in the gearbox. Usually, it is necessary to disassemble all of them to carry out the work of injecting lubricating oil. At the same time, when too much lubricating oil is added, it cannot be recovered and reused, so it is time-consuming and laborious in actual use, and also increases the use cost to a certain extent. Content of the Utility Model

[0004] The purpose of the utility model is to provide a gearbox for an electric assisted vehicle to solve at least any one of the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A gearbox for an electric assisted vehicle, including a speed change housing, an output housing is arranged on the left side of the speed change housing, two card slots are opened at the top of the speed change housing, a housing cover is arranged on the top of the speed change housing, two card blocks adapted to the card slots are fixedly connected to the bottom of the housing cover, threaded holes are opened at the card blocks, the top of the card slots and the housing cover, a filter screen is fixedly connected to the middle part of the inner cavity of the speed change housing, a driving shaft is rotatably connected to the back of the speed change housing through a bearing, driving mechanisms are respectively arranged on the front and back of the speed change housing, and an oil filling mechanism is arranged on the front of the speed change housing.

[0006] Preferably, three threaded holes are in a group and a total of four groups are provided, and fixing bolts are threadedly connected to the inner cavities of each group of threaded holes.

[0007] Preferably, the driving mechanism includes a servo motor arranged on the left side of the front of the speed change housing, a speed change shaft is sleeved in the middle of the output shaft of the servo motor, and detachable motion mechanisms are arranged on one side of the output shaft of the servo motor adjacent to the driving shaft.

[0008] Preferably, the detachable motion mechanism includes two connecting seats fixedly connected to the adjacent side of the output shaft of the servo motor and the drive shaft. A cross-shaped slot is provided on one side of each of the two connecting seats. A cross-shaped block is provided in the inner cavity of each cross-shaped slot. A first gear and a second gear are respectively and fixedly connected to the adjacent sides of the two cross-shaped blocks.

[0009] Preferably, two threaded slots are provided at the tops of the two cross-shaped blocks and the connecting seats. A positioning bolt is threadedly connected to the inner cavity of every two threaded slots.

[0010] Preferably, the lubricating oil adding mechanism includes a loading box fixedly connected to the right side of the front of the speed change housing. A liquid injection hole is provided at the top of the loading box. A sealing cover is threadedly connected to the inner cavity of the liquid injection hole. A liquid extraction pipe is sleeved on the right side of the loading box. A first liquid extraction pump is sleeved in the middle of the liquid extraction pipe. An outlet pipe is sleeved at the top of the liquid extraction pipe.

[0011] Preferably, the lubricating oil adding mechanism further includes an L-shaped recovery pipe sleeved between the loading box and the speed change housing. A second liquid extraction pump is sleeved in the middle of the L-shaped recovery pipe.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, the sealing cover is removed from the liquid injection hole by counterclockwise rotation of the knob to fill the loading box with lubricating oil. Then, the first liquid extraction pump sucks the lubricating oil in the loading box through the liquid extraction pipe. Finally, the lubricating oil is injected between the first gear and the second gear through the outlet pipe. And the excess lubricating oil will flow into the bottom of the speed change housing after being filtered by the filter screen. Then, the second liquid extraction pump sucks the excess lubricating oil in the speed change housing through the L-shaped recovery pipe and pumps it back into the loading box, so as to prevent the situation that the first gear and the second gear lack lubricating oil and cannot be used after a long time of use, and the waste of lubricating oil increases the cost.

[0014] 2. In the present utility model, the output end of the servo motor drives the speed change shaft and the first gear to rotate. Since the first gear is meshed with the second gear, when the first gear rotates, it drives the second gear and the drive shaft to rotate for speed change. When it is necessary to disassemble and replace the first gear and the second gear, the four fixing bolts are rotated counterclockwise in the inner cavities of the four groups of threaded holes and taken out to release the fixation between the shell cover and the speed change housing. Subsequently, the shell cover is moved upward so that the clamping blocks are also removed from the clamping grooves together, and then the shell cover and the speed change housing can be separated and opened. Thus, it is convenient for the operator to clean the inside of the speed change housing, preventing the accumulation of waste inside over time. Subsequently, the positioning bolt is rotated and taken out in the threaded groove to release the fixation between the cross-shaped clamping block and the cross-shaped slot hole, and then the cross-shaped clamping block is removed from the cross-shaped slot hole to drive the disassembly of the first gear and the second gear respectively, thereby preventing the inconvenience caused when the first gear and the second gear need to be replaced and repaired after the device has been used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a three-dimensional structural schematic diagram of the inside of the speed change housing of the present utility model;

[0017] Figure 3 is a three-dimensional structural schematic diagram of the detachable motion mechanism of the present utility model;

[0018] Figure 4 is a three-dimensional structural schematic diagram of the drive shaft of the present utility model;

[0019] Figure 5 is a three-dimensional structural schematic diagram of the oil filling mechanism of the present utility model.

[0020] In the figure: 1. Speed change housing; 2. Output housing; 3. Clamping groove; 4. Shell cover; 5. Clamping block; 6. Threaded hole; 7. Fixing bolt; 8. Drive shaft; 9. Servo motor; 10. Speed change shaft; 11. Connecting seat; 12. Cross-shaped slot hole; 13. Cross-shaped clamping block; 14. Threaded groove; 15. Positioning bolt; 16. First gear; 17. Second gear; 18. Sealing cover; 19. Liquid extraction pipe; 20. First liquid extraction pump; 21. Liquid outlet pipe; 22. L-shaped recovery pipe; 23. Filter screen; 24. Second liquid extraction pump; 25. Loading box; 26. Liquid injection hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0022] The present utility model provides a Figures 1-5 transmission for an electric assist vehicle as shown, including a transmission housing 1, an output housing 2 is arranged on the left side of the transmission housing 1, two card slots 3 are opened at the top of the transmission housing 1, a housing cover 4 is arranged at the top of the transmission housing 1, two clamping blocks 5 adapted to the card slots 3 are fixedly connected to the bottom of the housing cover 4, threaded holes 6 are opened at the clamping blocks 5 and the top of the housing cover 4, a filter screen 23 is fixedly connected to the middle of the inner cavity of the transmission housing 1, a driving shaft 8 is rotatably connected to the back of the transmission housing 1 through a bearing, driving mechanisms are respectively arranged on the front and back of the transmission housing 1, and an oil filling mechanism is arranged on the front of the transmission housing 1.

[0023] Further, three threaded holes 6 are in a group and a total of four groups are provided. A fixing bolt 7 is threadedly connected to the inner cavity of each group of threaded holes 6. By counterclockwise rotating and removing the four fixing bolts 7 arranged in the inner cavities of the four groups of threaded holes 6, the fixation between the housing cover 4 and the transmission housing 1 is released. Then, the housing cover 4 is moved upward to move the clamping blocks 5 out of the card slots 3 together, and the housing cover 4 can be separated and opened from the transmission housing 1, so as to facilitate the operator to clean the inside of the transmission housing 1 and prevent waste accumulation inside over time.

[0024] Further, the driving mechanism includes a servo motor 9 arranged on the left side of the front of the transmission housing 1. A transmission shaft 10 is sleeved in the middle of the output shaft of the servo motor 9. Removable motion mechanisms are arranged on both sides of the output shaft of the servo motor 9 adjacent to the driving shaft 8. By arranging the driving mechanism, it is convenient for the operator to drive the first gear 16 and the second gear 17 in the removable motion mechanism to rotate, thus providing effective convenience for the operator.

[0025] Further, the detachable motion mechanism includes two connecting seats 11 fixedly connected to the adjacent side of the output shaft of the servo motor 9 and the drive shaft 8. A cross-shaped slot 12 is provided on one side of each of the two connecting seats 11. A cross-shaped block 13 is arranged in the inner cavity of the cross-shaped slot 12. A first gear 16 and a second gear 17 are respectively fixedly connected to the adjacent sides of the two cross-shaped blocks 13. Two threaded grooves 14 are provided at the top of each of the two cross-shaped blocks 13 and the connecting seat 11. A positioning bolt 15 is threadedly connected to the inner cavity of every two threaded grooves 14. By providing the detachable motion mechanism, it is convenient for the operator to disassemble the first gear 16 and the second gear 17, thereby preventing the inconvenience caused when the first gear 16 and the second gear 17 need to be replaced and repaired after the device has been used for a long time.

[0026] Further, the lubricating mechanism includes a loading box 25 fixedly connected to the right side of the front of the speed change housing 1. A liquid injection hole 26 is provided at the top of the loading box 25. A sealing cover 18 is threadedly connected to the inner cavity of the liquid injection hole 26. A liquid extraction pipe 19 is sleeved on the right side of the loading box 25. A first liquid extraction pump 20 is sleeved in the middle of the liquid extraction pipe 19. A liquid outlet pipe 21 is sleeved on the top of the liquid extraction pipe 19. The lubricating mechanism further includes an L-shaped recovery pipe 22 sleeved between the loading box 25 and the speed change housing 1. A second liquid extraction pump 24 is sleeved in the middle of the L-shaped recovery pipe 22. By providing the lubricating mechanism, it is convenient for the operator to add lubricating oil to the first gear 16 and the second gear 17 in the detachable motion mechanism and recover the dripping lubricating oil, thereby preventing the device from lacking lubricating oil and wasting lubricating oil when the first gear 16 and the second gear 17 are used for a long time.

[0027] In the specific implementation of the present utility model, the output end of the servo motor 9 drives the speed change shaft 10 and the first gear 16 to rotate. Since the first gear 16 is meshed with the second gear 17, when the first gear 16 rotates, it drives the second gear 17 and the drive shaft 8 to rotate for speed change. When it is necessary to disassemble and replace the first gear 16 and the second gear 17, the four fixing bolts 7 are rotated counterclockwise in the inner cavities of the four groups of threaded holes 6 and taken out to release the fixation of the housing cover 4 and the speed change housing 1. Then, the housing cover 4 is moved upward so that the clamping block 5 is also removed from the clamping groove 3, and the housing cover 4 can be separated and opened from the speed change housing 1, thus facilitating the operator to clean the inside of the speed change housing 1 and preventing the accumulation of waste inside over time. Subsequently, the positioning bolt 15 is rotated and taken out in the threaded groove 14 to release the fixation of the cross-shaped clamping block 13 and the cross-shaped slot hole 12, and then the cross-shaped clamping block 13 is removed from the cross-shaped slot hole 12 to drive the disassembly of the first gear 16 and the second gear 17 respectively, thereby preventing the inconvenience caused when it is necessary to replace and repair the first gear 16 and the second gear 17 after the device has been used for a long time. When it is necessary to add lubricating oil to the first gear 16 and the second gear 17, the sealing cover 18 is rotated counterclockwise and taken out from the liquid injection hole 26, and lubricating oil is filled into the loading box 25. Then, the first liquid pumping pump 20 sucks the lubricating oil in the loading box 25 through the liquid suction pipe 19, and finally the lubricating oil is injected between the first gear 16 and the second gear 17 through the liquid outlet pipe 21. The excess lubricating oil will flow into the bottom of the speed change housing 1 after being filtered by the filter screen 23. Subsequently, the second liquid pumping pump 24 sucks the excess lubricating oil in the speed change housing 1 through the L-shaped recovery pipe 22 and pumps it back into the loading box 25, thereby preventing the adverse situations of the first gear 16 and the second gear 17 being unable to be used due to lack of lubricating oil and wasting lubricating oil to increase costs after being used for a long time.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An electric power-assisted vehicle transmission, comprising a transmission housing (1), characterized in that: On the left side of the transmission housing (1), an output housing (2) is provided. Two card slots (3) are opened at the top of the transmission housing (1). A housing cover (4) is arranged at the top of the transmission housing (1). Two card blocks (5) that are mutually adapted to the card slots (3) are fixedly connected to the bottom of the housing cover (4). Threaded holes (6) are opened at the card blocks (5), the card slots (3), and the top of the housing cover (4). A filter screen (23) is fixedly connected to the middle part of the inner cavity of the transmission housing (1). A driving shaft (8) is rotatably connected to the back of the transmission housing (1) through a bearing. Driving mechanisms are respectively arranged on the front and back of the transmission housing (1). An oil filling mechanism is arranged on the front of the transmission housing (1).

2. The electric power-assisted vehicle gearbox according to claim 1, characterized in that: The threaded holes (6) are grouped in three and a total of four groups are provided. Fixing bolts (7) are threadedly connected to the inner cavities of each group of the threaded holes (6).

3. The electric power-assisted vehicle transmission according to claim 1, wherein: The driving mechanism includes a servo motor (9) arranged on the left side of the front of the transmission housing (1). A transmission shaft (10) is sleeved in the middle of the output shaft of the servo motor (9). Detachable movement mechanisms are arranged on one side adjacent to the output shaft of the servo motor (9) and the driving shaft (8).

4. The electric power-assisted vehicle transmission according to claim 3, wherein: The detachable movement mechanism includes two connecting seats (11) fixedly connected to one side adjacent to the output shaft of the servo motor (9) and the driving shaft (8). Cross-shaped slot holes (12) are opened on one side of the two connecting seats (11). Cross-shaped card blocks (13) are arranged in the inner cavities of the cross-shaped slot holes (12). A first gear (16) and a second gear (17) are respectively fixedly connected to one side adjacent to the two cross-shaped card blocks (13).

5. A transmission for an electric power-assisted vehicle according to claim 4, characterized in that: Two threaded grooves (14) are opened at the cross-shaped card blocks (13) and the top of the connecting seats (11). Positioning bolts (15) are threadedly connected to the inner cavities of every two of the threaded grooves (14).

6. The electric power-assisted vehicle gearbox according to claim 1, wherein: The oil filling mechanism includes a loading box (25) fixedly connected to the right side of the front of the transmission housing (1). A liquid injection hole (26) is opened at the top of the loading box (25). A sealing cover (18) is threadedly connected to the inner cavity of the liquid injection hole (26). A liquid extraction pipe (19) is sleeved on the right side of the loading box (25). A first liquid extraction pump (20) is sleeved in the middle of the liquid extraction pipe (19). An outlet pipe (21) is sleeved on the top of the liquid extraction pipe (19).

7. The electric power assisted vehicle gearbox according to claim 6, wherein: The oil filling mechanism further includes an L-shaped recovery pipe (22) sleeved between the loading box (25) and the transmission housing (1). A second liquid extraction pump (24) is sleeved in the middle of the L-shaped recovery pipe (22).

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