Model car high-low speed conversion device

Abstract

The utility model provides a model car high and low speed conversion device, which relates to the technical field of model car high and low speed conversion devices and comprises a high and low speed conversion machine, a first motor is arranged on one side of the high and low speed conversion machine, and the output end of the first motor is fixedly connected with a first driving gear. According to the lubricating device, the lubricating oil tank is fixed to the outer surface of the double-face clamping ring block through the detachable device, then the spiral groove cover is screwed to the threaded pipe, the oil cover is opened, lubricating oil is injected into the lubricating oil tank through the oil inlet pipe, then the valve is opened, and the lubricating oil flows out of the oil outlet pipe; and then entering the threaded pipe, flowing between the double-sided snap ring block and the sliding rod through the inlet hole, the flow guide groove and the flow guide hole, and lubricating the double-sided snap ring block and the sliding rod, so that the friction force generated during back-and-forth sliding is reduced, the abrasion between the double-sided snap ring block and the sliding rod is reduced, the service life of the double-sided snap ring block is prolonged, and the service life of the high-low speed conversion machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-low speed conversion devices for model cars, in particular to a high-low speed conversion device for a model car. Background Art

[0002] A high-low speed conversion device for a model car is a device used in a model car to allow the driver to switch between high speed and low speed according to driving needs or road conditions.

[0003] When the high-low speed converter is placed on the model car for use, during the high-low speed conversion, the third motor will drive one end of the pulling bracket to rotate, and the other end will pull the double-sided snap ring block to slide on the slide rod. When it slides to one end to a certain distance and is stuck on the outer surface of the snap ring block, the high-speed gear set will be limited. At this time, the model car uses a low-speed state. When sliding on the contrary, the low-speed gear set can be limited to make the model car use a high-speed state. The friction between the double-sided snap ring block and the slide rod is large, which is easy to cause wear on the inner wall of the double-sided snap ring block, reducing the service life of the double-sided snap ring block, thereby reducing the service life of the high-low speed converter. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a high-low speed conversion device for a model car.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-low speed conversion device for a model car, comprising a high-low speed conversion machine, a first motor is arranged on one side of the high-low speed conversion machine, a first driving gear is fixedly connected to the output end of the first motor, one end of the first driving gear is connected through the inner wall of the high-low speed conversion machine, a circular shaft is rotatably connected to one side of the inner wall of the high-low speed conversion machine, a second driving gear is fixedly connected to the outer surface of the circular shaft, the second driving gear is meshed with the first driving gear, a first high-speed gear is fixedly connected to the outer surface of the circular shaft, a first low-speed gear is rotatably connected to the outer surface of the circular shaft, a second motor is fixedly connected to one side of the high-low speed conversion machine, a third driving gear is fixedly connected to the output end of the second motor, a fourth driving gear is rotatably connected to the inner wall of the high-low speed conversion machine, the fourth driving gear is meshed with the third driving gear, and the fourth One side of the driving gear is fixedly connected with a second low-speed gear, the second low-speed gear is meshed with the first low-speed gear, one side of the second low-speed gear is rotatably connected with a sliding rod, one side of the sliding rod is rotatably connected with a second high-speed gear, the first high-speed gear is meshed with the second high-speed gear, one side of the second high-speed gear is fixedly connected with a toothed ring block, one side of the inner wall of the high-low speed converter is fixedly connected with a third motor, an output end of the third motor is fixedly connected with a pulling shaft frame, and an inner wall of one end of the pulling shaft frame is fixedly connected with a double-sided snap ring block, two ends of the double-sided snap ring block are respectively inserted into the outer surface of the toothed ring block and the inner wall of the second low-speed gear, the inner wall of the double-sided snap ring block is slidably connected to the outer surface of the sliding rod, and the outer surface of the double-sided snap ring block is provided with a lubrication device, the lubrication device includes a lubricating oil tank, and a detachable device is provided between one side of the lubricating oil tank and the outer surface of the double-sided snap ring block.

[0006] The effect achieved by the above components is: when the high-low speed converter is placed on the model car for use, when the high-low speed converter is placed on the model car for use, when the high-low speed conversion is performed, the third motor will drive one end of the pulling bracket to rotate, and the other end will pull the double-sided retaining ring block to slide on the slide rod. When it slides to one end to a certain distance and is stuck on the outer surface of the retaining ring block, the high-speed gear set is limited. At this time, the model car uses the low-speed state. When sliding on the contrary, the low-speed gear set can be limited, so that the model car uses the high-speed state.

[0007] Preferably, an oil inlet pipe is fixedly connected to one side of the lubricating oil tank, an oil cap is threadedly connected to the outer surface of the oil inlet pipe, an oil outlet pipe is symmetrically fixedly connected to the bottom of the lubricating oil tank, a valve is provided on the inner wall of the oil outlet pipe, a screw groove cover is rotatably connected to one end of the oil outlet pipe, a threaded pipe is symmetrically fixedly connected to the outer surface of the double-sided retaining ring block, inlet holes are symmetrically provided on the outer surface of the double-sided retaining ring block, a guide groove is provided on the inner wall of the double-sided retaining ring block, the threaded pipe is communicated with the inlet hole and the inner wall of the guide groove, and a plurality of guide holes are provided on the inner wall of the guide groove.

[0008] The effects achieved by the above components are as follows: by setting up a lubrication device, the lubricating oil tank is first fixed to the outer surface of the double-sided snap ring block through a detachable device, and then the screw groove cover is screwed on the threaded tube, the oil cover is opened to inject the lubricating oil into the interior of the lubricating oil tank through the oil inlet pipe, and then the valve is opened to allow the lubricating oil to flow out from the oil outlet pipe and then enter the threaded tube, and flow into the double-sided snap ring block and the sliding rod through the inlet hole, the guide groove and the guide hole, and lubricate them to reduce the friction generated when sliding back and forth, reduce the wear between the two, and increase the service life of the double-sided snap ring block, thereby increasing the service life of the high-low speed converter.

[0009] Preferably, a plurality of arc-shaped grooves are formed on the inner wall of the double-sided clamping ring block, the inner wall of the arc-shaped groove is connected to the inner wall of the guide hole, and a sponge block is fixedly connected to the inner wall of the arc-shaped groove.

[0010] The effect achieved by the above components is that by arranging the sponge block, the lubricating oil flowing out of the guide hole can be absorbed and infiltrated, and the lubricating oil can be evenly applied to the connection.

[0011] Preferably, a sealing block is fixedly connected to the inner wall of the screw groove cover, and the sealing block is made of rubber.

[0012] The effect achieved by the above components is that the gap between the inner wall of the screw groove cover and the threaded pipe can be sealed and blocked by arranging the sealing block, so that the lubricating oil is not easy to overflow from the gap.

[0013] Preferably, a plurality of protrusions are fixedly connected to the outer surface of the oil cover, and the plurality of protrusions are arranged at equal distances.

[0014] The effect achieved by the above-mentioned components is that by providing the protrusions, the contact friction force on the surface of the oil cover can be increased, making it more secure and less likely to slide when it is manually held and twisted.

[0015] Preferably, the detachable device includes two card hole blocks, one side of the card hole block is fixedly connected to the outer surface of the double-sided card ring block, one side of the lubricating oil tank is fixedly connected to a mounting block, both sides of the mounting block are fixedly connected to telescopic rods, one end of the telescopic rod is fixedly connected to a card block, the outer surface of the telescopic rod is sleeved with a spring, both ends of the spring are respectively fixedly connected to the card block and one side of the mounting block, one side of the card block is fixedly connected to an anti-sliding block, and one end of the card block is inserted into the inner wall of the card hole block.

[0016] The effect achieved by the above components is: by setting a detachable device, when the lubricating oil tank is fixedly installed on the double-sided clamping ring block, the clamping block can be manually held and moved to one side of the mounting block to a certain position, so that the telescopic rod and the spring are compressed, and then the lubricating oil tank is moved to a certain position and the two clamping blocks are clamped into the inner walls of the two clamping hole blocks, so that the lubricating oil tank can be fixed on the double-sided clamping ring block for easy use. Similarly, it can be removed for convenient maintenance and replacement.

[0017] Preferably, reinforcement rods are fixedly connected to both sides of the mounting block, and one side of the reinforcement rod is fixedly connected to one side of the lubricating oil tank.

[0018] The effect achieved by the above components is that by arranging the reinforcing rod, the contact area between the lubricating oil tank and the mounting block can be increased, making the connection more secure and less prone to breakage and damage.

[0019] Preferably, one side of the hole block is symmetrically fixedly connected to a limiting block, and the two limiting blocks are fixed on both sides of the entrance of the hole block in an inclined manner.

[0020] The effect achieved by the above components is: by setting the limit block, the area of ​​the entrance of the card hole block can be increased, so that the card block can be quickly aligned and inserted.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are:

[0022] In the utility model, by arranging a lubricating device, the lubricating oil tank is first fixed on the outer surface of the double-sided snap ring block by a detachable device, and then the screw groove cover is screwed on the threaded pipe, the oil cover is opened to inject the lubricating oil into the interior of the lubricating oil tank through the oil inlet pipe, and then the valve is opened to allow the lubricating oil to flow out from the oil outlet pipe and then enter the threaded pipe, and flow into the double-sided snap ring block and the sliding rod through the inlet hole, the guide groove and the guide hole, and lubricate them, so as to reduce the friction generated when sliding back and forth, reduce the wear between the two, and improve the service life of the double-sided snap ring block, thereby improving the service life of the high-low speed conversion machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a three-dimensional structural schematic diagram of the high-low speed conversion machine of the utility model;

[0024] Figure 2 for Figure 1 A in the middle is an enlarged schematic diagram of the three-dimensional structure;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the double-sided clamping ring block of the utility model;

[0026] Figure 4 It is a three-dimensional structural schematic diagram of the lubricating oil tank of the utility model.

[0027] Legend: 1. High-low speed converter; 2. Lubrication device; 3. Removable device; 4. First motor; 5. First drive gear; 6. Second drive gear; 7. First high-speed gear; 8. Slide bar; 9. Second high-speed gear; 10. Gear ring block; 11. Second motor; 12. Third drive gear; 13. First low-speed gear; 14. Fourth drive gear; 15. Second low-speed gear; 16. Third motor; 17. Pulling shaft frame; 18. Double-sided card Ring block; 19, round shaft; 21, lubricating oil tank; 22, oil inlet pipe; 23, oil cover; 24, oil outlet pipe; 25, screw groove cover; 26, threaded pipe; 27, inlet hole; 28, guide groove; 29, guide hole; 210, arc groove; 211, sponge block; 212, sealing block; 213, protrusion; 31, card hole block; 32, mounting block; 33, telescopic rod; 34, card block; 35, spring; 36, anti-sliding block; 37, reinforcement rod; 38, limit block. DETAILED DESCRIPTION

[0028] Embodiment 1, as Figure 1-4As shown, a high-low speed conversion device for a model car comprises a high-low speed conversion machine 1, a first motor 4 is arranged on one side of the high-low speed conversion machine 1, a first driving gear 5 is fixedly connected to the output end of the first motor 4, one end of the first driving gear 5 is connected through the inner wall of the high-low speed conversion machine 1, a round shaft 19 is rotatably connected to one side of the inner wall of the high-low speed conversion machine 1, a second driving gear 6 is fixedly connected to the outer surface of the round shaft 19, the second driving gear 6 is meshed with the first driving gear 5, a first high-speed gear 7 is fixedly connected to the outer surface of the round shaft 19, a first low-speed gear 13 is rotatably connected to the outer surface of the round shaft 19, a second motor 11 is fixedly connected to one side of the high-low speed conversion machine 1, a third driving gear 12 is fixedly connected to the output end of the second motor 11, a fourth driving gear 14 is rotatably connected to the inner wall of the high-low speed conversion machine 1, the fourth driving gear 14 is meshed with the third driving gear 12, and a second low-speed gear 13 is fixedly connected to one side of the fourth driving gear 14. High-speed gear 15, the second low-speed gear 15 is meshed with the first low-speed gear 13, one side of the second low-speed gear 15 is rotatably connected with a slide bar 8, one side of the slide bar 8 is rotatably connected with a second high-speed gear 9, the first high-speed gear 7 is meshed with the second high-speed gear 9, one side of the second high-speed gear 9 is fixedly connected with a snap ring block 10, one side of the inner wall of the high-low speed converter 1 is fixedly connected with a third motor 16, the output end of the third motor 16 is fixedly connected with a pulling shaft frame 17, and the inner wall of one end of the pulling shaft frame 17 is fixedly connected with a double-sided snap ring block 18, the two ends of the double-sided snap ring block 18 are respectively inserted in the outer surface of the snap ring block 10 and the inner wall of the second low-speed gear 15, the inner wall of the double-sided snap ring block 18 is slidably connected with the outer surface of the slide bar 8, and the outer surface of the double-sided snap ring block 18 is provided with a lubrication device 2, the lubrication device 2 includes a lubricating oil tank 21, and a detachable device 3 is provided between one side of the lubricating oil tank 21 and the outer surface of the double-sided snap ring block 18. When the high-low speed converter 1 is placed on the model car for use, when the high-low speed converter 1 is placed on the model car for use, when the high-low speed conversion is performed, the third motor 16 will drive one end of the pulling bracket to rotate, and the other end will pull the double-sided snap ring block 18 to slide on the slide rod 8. When it slides to one end to a certain distance and is stuck on the outer surface of the snap ring block 10, the high-speed gear set is limited. At this time, the model car uses the low-speed state. When sliding on the contrary, the low-speed gear set can be limited to make the model car use the high-speed state.

[0029] Reference Figure 1-4As shown, the present embodiment discloses that an oil inlet pipe 22 is fixedly connected to one side of the lubricating oil tank 21, an oil cover 23 is threadedly connected to the outer surface of the oil inlet pipe 22, an oil outlet pipe 24 is symmetrically fixedly connected to the bottom of the lubricating oil tank 21, a valve is provided on the inner wall of the oil outlet pipe 24, a screw groove cover 25 is rotatably connected to one end of the oil outlet pipe 24, a threaded pipe 26 is symmetrically fixedly connected to the outer surface of the double-sided snap ring block 18, an inlet hole 27 is symmetrically opened on the outer surface of the double-sided snap ring block 18, a guide groove 28 is opened on the inner wall of the double-sided snap ring block 18, the threaded pipe 26 and the inlet hole 27 and the inner wall of the guide groove 28 are all connected, and a plurality of guide holes 29 are opened on the inner wall of the guide groove 28. By setting the lubricating device 2, the lubricating oil tank 21 is first fixed on the outer surface of the double-sided snap ring block 18 through the detachable device 3, and then the screw groove cover 25 is screwed on the threaded tube 26, the oil cover 23 is opened to inject the lubricating oil into the interior of the lubricating oil tank 21 through the oil inlet pipe 22, and then the valve is opened to make the lubricating oil flow out from the oil outlet pipe 24, and then enter the threaded tube 26, and flow into the double-sided snap ring block 18 and the slide rod 8 between the inlet hole 27 and the guide groove 28 and the guide hole 29, and lubricate them to reduce the friction generated when sliding back and forth, reduce the wear between the two, and improve the service life of the double-sided snap ring block 18, thereby improving the service life of the high-low speed converter 1. The inner wall of the double-sided snap ring block 18 is provided with a plurality of arc grooves 210, the inner wall of the arc groove 210 is connected with the inner wall of the guide hole 29, and the inner wall of the arc groove 210 is fixedly connected with a sponge block 211. By providing the sponge block 211, the lubricating oil flowing out of the guide hole 29 can be absorbed and infiltrated, and the lubricating oil can be evenly applied to the connection.

[0030] Reference Figure 1-4 As shown, this embodiment discloses that the inner wall of the screw groove cover 25 is fixedly connected with a sealing block 212, and the sealing block 212 is made of rubber. By providing the sealing block 212, the gap between the inner wall of the screw groove cover 25 and the threaded tube 26 can be sealed and blocked, so that the lubricating oil is not easy to overflow from the gap. The outer surface of the oil cover 23 is fixedly connected with a plurality of protrusions 213, and the plurality of protrusions 213 are arranged at equal distances. By providing the protrusions 213, the contact friction force on the surface of the oil cover 23 can be increased, so that it is more firm and less likely to slip when it is manually held and twisted.

[0031] Reference Figure 1-4As shown, this embodiment discloses that the detachable device 3 includes two card hole blocks 31, one side of the card hole block 31 is fixedly connected to the outer surface of the double-sided snap ring block 18, one side of the lubricating oil tank 21 is fixedly connected to a mounting block 32, both sides of the mounting block 32 are fixedly connected to telescopic rods 33, one end of the telescopic rod 33 is fixedly connected to a card block 34, the outer surface of the telescopic rod 33 is sleeved with a spring 35, both ends of the spring 35 are respectively fixedly connected to the card block 34 and one side of the mounting block 32, one side of the card block 34 is fixedly connected to an anti-sliding block 36, and one end of the card block 34 is inserted into the inner wall of the card hole block 31. When the lubricating oil tank 21 is fixedly installed on the double-sided snap ring block 18, the clamping block 34 can be manually held and moved to a certain position on one side of the mounting block 32 so that the telescopic rod 33 and the spring 35 are compressed. Then, after the lubricating oil tank 21 is moved to a certain position, the two clamping blocks 34 are clamped into the inner walls of the two clamping hole blocks 31. In this way, the lubricating oil tank 21 can be fixed on the double-sided snap ring block 18 for easy use. Similarly, it can be disassembled for convenient maintenance and replacement.

[0032] Reference Figure 1-4 As shown, this embodiment discloses that both sides of the mounting block 32 are fixedly connected with a reinforcing rod 37, and one side of the reinforcing rod 37 is fixedly connected to one side of the lubricating oil tank 21. By providing the reinforcing rod 37, the contact area between the lubricating oil tank 21 and the mounting block 32 can be increased, so that the connection is more secure and less prone to breakage and damage. One side of the clamping hole block 31 is symmetrically fixedly connected with a limiting block 38, and the two limiting blocks 38 are fixed on both sides of the entrance of the clamping hole block 31 in an inclined manner. By providing the limiting block 38, the area of ​​the entrance of the clamping hole block 31 can be increased, so that the clamping block 34 can be quickly aligned and clamped in.

[0033] Working principle: when the high-low speed converter 1 is placed on the model car for use, the first motor 4 and the second motor 11 will be started at the same time, the first motor 4 will drive the first drive gear 5 to rotate, and then drive the second drive gear 6 and the circular shaft 19 and the first high-speed gear 7 to rotate, the rotation of the first high-speed gear 7 will drive the second high-speed gear 9 on one side of the slide bar 8 to rotate, the second motor 11 can drive the third drive gear 12 to rotate, and then drive the fourth drive gear 14 and the second low-speed gear 15 to rotate, the slide bar 8 and the double-sided snap ring block 18 are pulled to limit the rotation axis frame 17. The rotation of the second low-speed gear 15 can drive the first low-speed gear 13 to rotate on the circular shaft 19. When high-speed and low-speed conversion is performed, when the model car needs to be in a high-speed state, the third motor 16 can be started to drive the end of the pull shaft frame 17 to rotate around the output end of the third motor 16, and then the other end pulls the double-sided snap ring block 18 to slide on the outer surface of the slide rod 8 toward one side of the second low-speed gear 15. After sliding to a certain distance, it is stuck in the inner wall of the second low-speed gear 15 to limit it, so that the low-speed gear set can be limited and stuck, so that the model car can be used in a high-speed state. Similarly, when the double-sided snap ring block 18 slides to a certain position in the opposite direction, one side will be stuck on the outer surface of the snap ring block 10, limiting the second high-speed gear 9, thereby limiting the high-speed gear set and making the model car use the low-speed state. First, manually hold the block 34 and move it to one side of the mounting block 32 to a certain position, so that the telescopic rod 33 and the spring 35 are compressed, and then move the lubricating oil tank 21 to a certain position and then insert the two blocks 34 into the inner walls of the two card hole blocks 31, so that the lubricating oil tank 21 can be fixed to the double-sided snap ring block 18 for easy use. Similarly, it can be disassembled Remove it for easy maintenance and replacement, then screw the screw groove cover 25 onto the threaded tube 26, open the oil cover 23, inject the lubricating oil into the interior of the lubricating oil tank 21 through the oil inlet pipe 22, and then open the valve to allow the lubricating oil to flow out from the oil outlet pipe 24, and then enter the threaded tube 26, and flow into the space between the double-sided snap ring block 18 and the slide rod 8 through the inlet hole 27, the guide groove 28 and the guide hole 29, and lubricate them to reduce the friction generated when sliding back and forth, reduce the wear between the two, and increase the service life of the double-sided snap ring block 18, thereby increasing the service life of the high-low speed converter 1.

Claims

1. A high-low speed conversion device for a model car, comprising a high-low speed conversion machine (1), characterized in that: A first motor (4) is provided on one side of the high-low speed converter (1); an output end of the first motor (4) is fixedly connected to a first drive gear (5); one end of the first drive gear (5) is connected to the inner wall of the high-low speed converter (1); a circular shaft (19) is rotatably connected to one side of the inner wall of the high-low speed converter (1); a second drive gear (6) is fixedly connected to the outer surface of the circular shaft (19); the second drive gear (6) is meshed with the first drive gear (5); and a first high-speed gear (6) is fixedly connected to the outer surface of the circular shaft (19). The first low-speed gear (13) is rotatably connected to the outer surface of the circular shaft (19); a second motor (11) is fixedly connected to one side of the high-low speed converter (1); a third drive gear (12) is fixedly connected to the output end of the second motor (11); a fourth drive gear (14) is rotatably connected to the inner wall of the high-low speed converter (1); the fourth drive gear (14) is meshed with the third drive gear (12); a second low-speed gear (15) is fixedly connected to one side of the fourth drive gear (14); and the second low-speed gear (15) is fixedly connected to the output end of the second motor (11). 15) is meshed with the first low-speed gear (13), one side of the second low-speed gear (15) is rotatably connected to a slide bar (8), one side of the slide bar (8) is rotatably connected to a second high-speed gear (9), the first high-speed gear (7) is meshed with the second high-speed gear (9), one side of the second high-speed gear (9) is fixedly connected to a toothed ring block (10), one side of the inner wall of the high-low speed converter (1) is fixedly connected to a third motor (16), the output end of the third motor (16) is fixedly connected to a pulling shaft frame (17), the pulling shaft A double-sided snap ring block (18) is fixedly connected to the inner wall of one end of the frame (17), and two ends of the double-sided snap ring block (18) are respectively inserted into the outer surface of the snap ring block (10) and the inner wall of the second low-speed gear (15). The inner wall of the double-sided snap ring block (18) is slidably connected to the outer surface of the sliding rod (8). A lubricating device (2) is provided on the outer surface of the double-sided snap ring block (18), and the lubricating device (2) includes a lubricating oil tank (21). A detachable device (3) is provided between one side of the lubricating oil tank (21) and the outer surface of the double-sided snap ring block (18).

2. A high-low speed conversion device for a model car according to claim 1, characterized in that: An oil inlet pipe (22) is fixedly connected to one side of the lubricating oil tank (21), and an oil cover (23) is threadedly connected to the outer surface of the oil inlet pipe (22). An oil outlet pipe (24) is symmetrically fixedly connected to the bottom of the lubricating oil tank (21), and a valve is provided on the inner wall of the oil outlet pipe (24). A screw groove cover (25) is rotatably connected to one end of the oil outlet pipe (24). A threaded pipe (26) is symmetrically fixedly connected to the outer surface of the double-sided snap ring block (18), and an inlet hole (27) is symmetrically provided on the outer surface of the double-sided snap ring block (18). A guide groove (28) is provided on the inner wall of the double-sided snap ring block (18). The threaded pipe (26) is connected to the inlet hole (27) and the inner wall of the guide groove (28), and a plurality of guide holes (29) are provided on the inner wall of the guide groove (28).

3. A high-low speed conversion device for a model car according to claim 2, characterized in that: The inner wall of the double-sided snap ring block (18) is provided with a plurality of arc-shaped grooves (210), the inner wall of the arc-shaped groove (210) is connected to the inner wall of the guide hole (29), and the inner wall of the arc-shaped groove (210) is fixedly connected with a sponge block (211).

4. A high-low speed conversion device for a model car according to claim 2, characterized in that: A sealing block (212) is fixedly connected to the inner wall of the screw groove cover (25), and the sealing block (212) is made of rubber material.

5. A high-low speed conversion device for a model car according to claim 2, characterized in that: A plurality of protrusions (213) are fixedly connected to the outer surface of the oil cover (23), and the plurality of protrusions (213) are arranged at equal distances.

6. A high-low speed conversion device for a model car according to claim 1, characterized in that: The detachable device (3) comprises two clamping blocks (31), one side of the clamping blocks (31) is fixedly connected to the outer surface of the double-sided clamping ring block (18), one side of the lubricating oil tank (21) is fixedly connected to a mounting block (32), both sides of the mounting block (32) are fixedly connected to telescopic rods (33), one end of the telescopic rod (33) is fixedly connected to a clamping block (34), the outer surface of the telescopic rod (33) is sleeved with a spring (35), the two ends of the spring (35) are respectively fixedly connected to the clamping block (34) and one side of the mounting block (32), one side of the clamping block (34) is fixedly connected to an anti-sliding block (36), and one end of the clamping block (34) is inserted into the inner wall of the clamping block (31).

7. A high-low speed conversion device for a model car according to claim 6, characterized in that: Both sides of the mounting block (32) are fixedly connected with reinforcement rods (37), and one side of the reinforcement rod (37) is fixedly connected to one side of the lubricating oil tank (21).

8. A high-low speed conversion device for a model car according to claim 6, characterized in that: One side of the clamping hole block (31) is symmetrically fixedly connected to a limiting block (38), and the two limiting blocks (38) are fixed in an inclined manner on both sides of the entrance of the clamping hole block (31).

Images