Rear axle tube

Abstract

The utility model discloses a rear axle tube, which belongs to the technical field of vehicles, and realizes efficient braking and speed reduction functions through a rear speed reduction shell and brake pad structure in combination with a hydraulic driving device. When braking is needed, hydraulic oil is injected into the oil cavity through an external oil injection device, the brake pad is pushed to be tightly attached to the outer surface of the axle, the wheel rotating speed is reduced through friction force, and the braking effect is achieved. Meanwhile, a quick response mechanism is further designed and integrated, the elastic body is used for helping the brake pad to return to the initial position more quickly when braking is relieved, and the response speed of the system is increased. In order to enhance the heat dissipation performance, the rear axle pipe is further provided with a ventilation system which comprises an air inlet pipe, an air outlet pipe and ventilation holes in the brake pad, the temperature of the speed reduction shell and the brake pad is effectively reduced, and the service life of parts is prolonged. In addition, the arrangement of a bearing and a sealing ring ensures the sealing performance and the stability of the system, and external impurities and liquid are prevented from entering the system.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, concretely relates to a rear axle bridge pipe. BACKGROUND

[0002] The rear axle bridge pipe is an important component of the vehicle transmission system, and its performance directly affects the driving stability and braking effect of the vehicle. The traditional rear axle bridge pipe design often uses a simple mechanical braking method, which achieves braking effect through the friction between the friction plate and the wheel or axle. However, this braking method has low braking efficiency, slow response speed, and poor heat dissipation performance.

[0003] Hydraulic braking technology achieves braking effect through the transmission and compression of hydraulic oil, and has the advantages of strong braking force, fast response speed, and good heat dissipation effect. In actual application, the design of the rear axle bridge pipe still faces many challenges. For example, how to improve the response speed and heat dissipation effect of the system while ensuring braking performance; how to ensure the sealing and stability of the hydraulic oil to prevent leakage and pollution; how to simplify the installation and maintenance process and reduce production costs. Therefore, it is necessary to further optimize and improve the design of the rear axle bridge pipe to meet the high requirements for safety and reliability. SUMMARY

[0004] In view of the above technical deficiencies, the utility model aims to provide a rear axle bridge pipe that can achieve good braking and cooling effect.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: the utility model provides a rear axle bridge pipe, which comprises a pipe body and an axle, the pipe body is fixed on a vehicle frame, and further comprises:

[0006] A reduction shell is arranged in the middle part of the pipe body, two slide cavities are symmetrically arranged in the interior of the reduction shell, a brake pad is slidingly installed in the interior of the slide cavity, the inner side of the brake pad is an arc surface, the arc surface is matched with the outer surface of the axle, and a driving device for driving the brake pad to slide is arranged in the interior of the reduction shell.

[0007] Preferably, the driving device comprises a connecting plate fixed at one end of the brake pad, a groove is formed in the interior of the reduction shell, one end of the connecting plate away from the brake pad extends into the groove, a pin shaft is fixed on one side of the connecting plate, an oil cavity is arranged at the end of the groove, one end of the pin shaft is inserted into the oil cavity, hydraulic oil is injected into the interior of the oil cavity, and the oil cavity is communicated with an oil injection device outside the reduction shell through an oil pipe.

[0008] Preferably, an elastic body is fixed at one end of the connecting plate away from the pin shaft.

[0009] Preferably, a sealing ring is fixed at one end of the pin shaft.

[0010] Preferably, the two sides of the deceleration shell are respectively provided with an air inlet pipe and an air outlet pipe.

[0011] Preferably, the inside of the brake pad is provided with a plurality of air holes.

[0012] Preferably, a gap is left between the axle and the inner wall of the deceleration shell, the inside of the pipe body is provided with a bearing, and the two sides of the deceleration shell are both provided with a bearing.

[0013] Preferably, the axle passes through the inside of the pipe body and extends out of the end of the pipe body to fix a wheel disc, and the wheel disc is provided with a mounting position for fixing a wheel.

[0014] The utility model has the advantages of:

[0015] Through the built-in deceleration shell and brake pad design, combined with the hydraulic drive device, the wheel speed can be slowed down to realize braking when needed, the ventilation system includes the air inlet pipe, the air outlet pipe and the air holes in the brake pad, which effectively reduces the temperature of the deceleration shell and the brake pad, prolongs the service life of the parts.

[0016] The bearings and sealing rings are arranged to ensure the normal circulation of gas and hydraulic oil in the system, prevent the entry of external impurities and liquids, and provide guarantee for the long-term stable operation of the rear axle pipe. DETAILED DESCRIPTION

[0017] Figure 1 It is a structural schematic view of the utility model.

[0018] Figure 2 It is a structural schematic view of the utility model brake pad. Figure 1 It is a sectional view along direction A-A.

[0019] Figure 3 It is a structural schematic view of the utility model brake pad.

[0020] Figure 4 It is a sectional view along direction B-B. Figure 2

[0021] In the drawing: 1, pipe body, 2, deceleration shell, 21, sliding cavity, 3, wheel disc, 4, axle, 5, brake pad, 6, connecting plate, 7, elastic body, 8, pin shaft, 9, oil pipe, 10, air inlet pipe, 11, air outlet pipe, 12, bearing. DETAILED DESCRIPTION

[0022] The utility model will be explained in detail by specific embodiments, but is not limited to the utility model.

[0023] Example 1

[0024] For example, Figures 1-3 ​As shown, in this embodiment, the rear axle bridge pipe provided includes a pipe body 1 and an axle 4, the pipe body 1 is fixed on the frame, the number of pipe bodies 1 is two, and they are symmetrically arranged on the two sides of the reduction box, the inside of the reduction box is provided with a driving motor for driving the rotation of the axle 4, further includes a reduction shell 2, the reduction shell 2 is arranged at the middle part of the pipe body 1, the inside of the reduction shell 2 is symmetrically provided with two sliding cavities 21, the inside of the sliding cavity 21 is slidably installed with a brake shoe 5, the inside of the brake shoe 5 is an arc surface, the arc surface is matched with the outer surface of the axle 4, the inside of the reduction shell 2 is provided with a driving device for driving the sliding of the brake shoe 5, through the built-in reduction shell 2 and the brake shoe 5 design, the rear axle bridge pipe can slow down the rotation speed of the wheel or realize the braking when needed, when the reduction or braking is needed, the driving device is activated, the driving device pushes the brake shoe 5 to slide in the sliding cavity 21, so that the arc surface of the brake shoe 5 is tightly attached to the outer surface of the axle 4, due to the friction between the brake shoe 5 and the axle 4, the rotation speed of the wheel is slowed down, so as to realize the purpose of reduction or braking.

[0025] Embodiment two

[0026] As Figures 1-3 shown, on the basis of embodiment one, the structure of the driving device is provided in this embodiment, which is as follows:

[0027] The driving device includes a connecting plate 6 fixed at one end of the brake shoe 5, the inside of the reduction shell 2 is provided with a groove, the end of the connecting plate 6 away from the brake shoe 5 extends into the groove, the side of the connecting plate 6 is fixed with a pin shaft 8, the end of the pin shaft 8 is inserted into the oil cavity, the inside of the oil cavity is injected with hydraulic oil, the oil cavity is communicated with the oil injection device outside the reduction shell 2 through the oil pipe 9, when braking is needed, the hydraulic oil is injected into the oil cavity through the oil injection device, the hydraulic oil pushes the pin shaft 8 and the connecting plate 6 connected therewith, and then pushes the brake shoe 5 to move towards the axle 4, so as to realize braking. When the braking is needed to be released, part of the hydraulic oil in the oil cavity is discharged through the oil injection device, the oil pressure is reduced, the counterforce on the connecting plate 6 and the brake shoe 5 is reduced, so as to allow the brake shoe 5 to return to the initial position.

[0028] The end of the connecting plate 6 away from the pin shaft 8 is fixed with an elastic body 7, the elastic body 7 is fixed at the end of the groove, in the braking process, the connecting plate 6 and the brake shoe 5 are moved by the thrust of the hydraulic oil, and at the same time, the elastic body 7 is compressed. When the hydraulic oil is discharged and the oil pressure is reduced, the elastic body 7 releases the stored energy to help the connecting plate 6 and the brake shoe 5 return to the initial position faster, and the response speed of the system is improved.

[0029] The end of the pin shaft 8 is fixed with a sealing ring, which ensures the sealing of the hydraulic oil and prevents the leakage of the hydraulic oil during the injection and discharge of the hydraulic oil, so as to ensure the normal work of the driving device.

[0030] Embodiment three

[0031] As Figures 1-4 shown, on the basis of example one and example two, the embodiment provides a ventilation system, as follows:

[0032] The two sides of the deceleration shell 2 are respectively provided with an air inlet pipe 10 and an air outlet pipe 11, which can form an air duct. The gas enters the inside of the deceleration shell 2 from the air inlet pipe 10 and is discharged from the air outlet pipe 11, forming the flow of air, thereby realizing the cooling of the inside of the deceleration shell 2. The air inlet pipe 10 can be communicated with the fan or can be directed to the front end of the vehicle, so that the natural wind automatically enters the inside of the deceleration shell 2 when the vehicle is running, thereby completing the cooling. A filter screen is needed at the air inlet pipe 10 to avoid the entry of external impurities.

[0033] The inside of the brake pad 5 is provided with a plurality of ventilation holes, through which the gas can pass through the brake pad 5, thereby completing the cooling of the brake pad 5.

[0034] The axle 4 and the inner wall of the deceleration shell 2 are left with a gap, the inside of the pipe body 1 is provided with a bearing 12, and the two sides of the deceleration shell 2 are also provided with a bearing 12. The bearing 12 can play a sealing role, so that when the gas passes through the deceleration shell 2, most of the gas will pass through the air outlet pipe 11 instead of flowing to other parts.

[0035] The axle 4 passes through the inside of the pipe body 1 and extends out of the end of the pipe body 1 to be fixed with the wheel disc 3. The wheel disc 3 is provided with a mounting position for fixing the wheel, and a plurality of fixing bolts are arranged on the wheel disc 3. During installation, the wheel is sleeved on the mounting position and is tightened through the fixing bolts.

[0036] Working principle: when the vehicle is running normally, the brake pad 5 is in a state of non-contact or slight contact with the axle 4 in the sliding cavity 21, which will not produce obvious resistance to the rotation of the wheel. The driving motor drives the axle 4 to rotate through the reduction box, thereby driving the wheel to move forward or backward.

[0037] When deceleration or braking is needed, the external oil injection device injects hydraulic oil into the oil chamber through the oil pipe 9. With the increase of the hydraulic oil, the oil pressure gradually rises, pushing the pin shaft 8 and the connecting plate 6 connected thereto to move towards the axle 4. The connecting plate 6 drives the brake pad 5 to tightly adhere to the outer surface of the axle 4. Due to the friction between the brake pad 5 and the axle 4, the rotation speed of the wheel begins to slow down, thereby realizing the braking effect.

[0038] When the brake needs to be released, the external oil injection device discharges part of the hydraulic oil in the oil chamber through the oil pipe 9, causing the oil pressure to decrease. At this time, the reaction force acting on the connecting plate 6 and the brake pad 5 decreases, and at the same time, the elastic body 7 releases its stored energy, helping the connecting plate 6 and the brake pad 5 to return to the initial position more quickly, thereby preparing for the next braking.

[0039] During braking, the heat generated by friction causes the temperature of the reduction housing 2 and the brake pad 5 to rise. At this time, the gas enters the inside of the reduction housing 2 from the air inlet pipe 10, is discharged through the air vent hole in the inside of the brake pad 5 and the air outlet pipe 11, forms the flow of air, thereby achieving the cooling of the reduction housing 2 and the brake pad 5. At the same time, the sealing effect of the bearing 12 and the sealing ring ensures the normal circulation of the gas in the system, prevents the accumulation of heat and the intrusion of external impurities.

[0040] Finally, it should be noted that the above examples are only used to illustrate and not limit the technical solutions of the present application. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the present application can still be modified or replaced by the same, without departing from the spirit and scope of the present application. Any modification or partial replacement should be covered in the scope of the claims of the present application.

Claims

1. A rear axle bridge tube, comprising a tube body (1) and an axle (4), wherein the tube body (1) is fixed on a vehicle frame, and is characterized in that: Also includes: A deceleration housing (2) is provided in the middle of the tube body (1), two sliding cavities (21) are symmetrically provided inside the deceleration housing (2), a brake pad (5) is slidably installed inside the sliding cavity (21), the inner side of the brake pad (5) is an arc surface, and the arc surface is adapted to the outer surface of the axle (4), and a driving device for driving the brake pad (5) to slide is provided inside the deceleration housing (2).

2. The rear axle bridge pipe according to claim 1, characterized in that: The driving device includes a connecting plate (6) with one end fixed on the brake pad (5), a groove is provided inside the reduction housing (2), and one end of the connecting plate (6) away from the brake pad (5) extends into the groove, a pin shaft (8) is fixed on one side of the connecting plate (6), an oil cavity is provided at the end of the groove, one end of the pin shaft (8) is inserted into the oil cavity, hydraulic oil is injected into the interior of the oil cavity, and the oil cavity is connected to the oil injection device outside the reduction housing (2) through an oil pipe (9).

3. The rear axle bridge pipe according to claim 2, characterized in that: An elastic body (7) is fixed to one end of the connecting plate (6) away from the pin shaft (8), and the elastic body (7) is fixed to the end of the groove.

4. The rear axle bridge pipe according to claim 2, characterized in that: A sealing ring is fixed to the end of the pin shaft (8).

5. The rear axle bridge pipe according to claim 1, characterized in that: An air inlet pipe (10) and an air outlet pipe (11) are respectively installed on both sides of the reduction housing (2).

6. The rear axle bridge pipe according to claim 5, characterized in that: The brake pad (5) is provided with a plurality of ventilation holes inside.

7. The rear axle bridge pipe according to claim 5, characterized in that: A gap is left between the axle (4) and the inner wall of the reduction housing (2); a bearing (12) is installed inside the tube (1); and bearings (12) are provided on both sides of the reduction housing (2).

8. The rear axle bridge pipe according to claim 1, characterized in that: The axle (4) passes through the interior of the tube body (1) and extends from the end of the tube body (1) to be fixed with a wheel disc (3), and the wheel disc (3) is provided with a mounting position for fixing a wheel.

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