Inner drum type braking and water-cooling heat dissipation integrated device of hub motor

Abstract

The invention discloses a hub motor inner drum type braking and water cooling heat dissipation integrated device. A rotor and a brake drum are both fixed to a hub, a stator is arranged on the inner side of the rotor and fixed to a holder, a rotating shaft penetrates through the holder and is rotationally connected with the hub, a brake shoe is arranged on the inner side of the brake drum and fixed to the rotating shaft, and the brake drum is coaxially arranged in a water retaining cylinder; the rotating shaft is fixed to the water retaining cylinder, two circular first water retaining ribs are arranged on the outer wall of the brake drum in the circumferential direction, two first water retaining grooves are formed in the inner wall of the water retaining cylinder, a cooling cavity is formed between the two first water retaining grooves, each first water retaining rib extends into one first water retaining groove, the cooling pipe is divided into two paths to be communicated with the cooling cavity, and the two paths are communicated with the water retaining cylinder. One path sprays a cooling medium into the cooling cavity, and the other path sucks the cooling medium in the cooling cavity. The problem that the working efficiency of the motor is affected by too high temperature when the motor works can be solved; and in addition, the braking resistance can be adjusted, and the auxiliary braking effect is achieved.

Description

Technical Field

[0001] The invention relates to an integrated device for drum brake and water cooling in a hub motor. Background Art

[0002] In-wheel motor drive is to install the electric drive system inside the wheel hub of the car, simplifying the transmission, clutch, drive shaft, differential and other structures in traditional cars, and realizing the integration of the power system, transmission system and brake system inside the wheel hub, which greatly improves the space utilization and transmission efficiency of the vehicle. As one of the important components of the car, the brake system, whether it is a disc brake or a drum brake, will generate a lot of heat during the braking process, and long-term braking will make the braking effect worse. For automotive wheel hub motors, the wheel hub motor is usually integrated with the brake. Liquid water is a good coolant and is widely used in cooling and heat dissipation devices. It is also widely used in the field of hydraulic retarder technology. Combining the water resistance retarder mechanism with the friction brake, which has the functions of providing water resistance and heat dissipation and cooling, this integrated structure is applied to the wheel hub motor, which has significant advantages, but no one has mentioned it so far. Summary of the invention

[0003] The present invention is to solve the problems existing in the above-mentioned prior art and provide an integrated device for in-wheel hub motor drum brake and water cooling. The present invention combines a hydraulic water resistance structure in the brake, which can not only rely on liquid cooling, but also enable the liquid to provide damping to generate braking resistance. The combination of friction braking and water resistance makes the braking effect more significant.

[0004] The technical solutions adopted in the present invention are: A hub motor inner drum brake and water cooling integrated device comprises a wheel hub, a rotor, a stator, a cage, a brake drum, a brake shoe and a rotating shaft, wherein the rotor and the brake drum are both fixed to the wheel hub, the stator is arranged on the inner side of the rotor and is fixed to the cage, the rotating shaft passes through the cage and is rotatably connected to the wheel hub, the brake shoe is arranged on the inner side of the brake drum and is fixed to the rotating shaft, and further comprises a water retaining cylinder and a cooling pipe, wherein the brake drum is coaxially arranged in the water retaining cylinder, the rotating shaft is fixed to the water retaining cylinder, two circular first water retaining ribs are arranged in the circumferential direction of the outer wall of the brake drum, two first water retaining grooves are arranged on the inner wall of the water retaining cylinder, a cooling cavity is formed between the two first water retaining grooves, each first water retaining rib extends into a first water retaining groove, and the cooling pipe is divided into two paths both connected to the cooling cavity, one path sprays cooling medium into the cooling cavity, and the other path sucks the cooling medium in the cooling cavity.

[0005] Furthermore, a plurality of damping blades arranged at equal intervals are provided on the outer wall of the brake drum, the damping blades are arranged along the axial direction of the brake drum, and the damping blades are placed at the middle position of the cooling cavity.

[0006] Furthermore, four convex ribs are provided on the inner wall of the water retaining tube in the circumferential direction, two convex ribs form a group, and a first water retaining groove is formed between the two convex ribs in each group.

[0007] Furthermore, a sealing member is provided in the first water retaining groove.

[0008] Furthermore, the water retaining cylinder is a cylinder with one end closed and the other end open, the rotating shaft passes through the closed end of the water retaining cylinder, and the open end of the water retaining cylinder is provided with a retaining edge portion bent 90° toward the axial direction, and the retaining edge portion is placed on one side of the wheel hub.

[0009] Furthermore, a second circular water retaining rib is provided on the inner end surface of the hub, a second water retaining groove is provided on the retaining edge, and the second water retaining rib is placed in the second water retaining groove.

[0010] Furthermore, a first water leakage cavity is formed between the retaining edge portion and the first water retaining groove on the corresponding side.

[0011] Furthermore, a baffle is fixed on the brake drum, and the baffle is coaxially arranged with the water retaining cylinder. The baffle seals the inner cavity of the brake drum, so that a second water leakage cavity is formed between the outer wall of the baffle and the inner wall of the water retaining cylinder.

[0012] Furthermore, the cooling pipe is also provided with two passages correspondingly connected to the first water leakage cavity and the second water leakage cavity, for sucking the cooling medium in the two water leakage cavities.

[0013] The present invention has the following beneficial effects: The present invention can solve the problem that the working efficiency of the motor is affected by the excessively high temperature when the motor is working; and can also adjust the braking resistance to play a role in auxiliary braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the present invention.

[0015] Figure 2 This is an enlarged view of the assembly of the water retaining cylinder and the brake drum.

[0016] Figure 3 This is a structural diagram of the brake drum. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 3 The present invention discloses an integrated device for in-wheel hub motor drum brake and water cooling, comprising a wheel hub 1, a rotor 2, a stator 3, a retaining frame 4, a brake drum 5, a brake shoe 6, a rotating shaft 7, a water retaining cylinder 8 and a cooling pipe 9.

[0019] The rotor 2 and the brake drum 5 are both fixed to the wheel hub 1, the stator 3 is arranged on the inner side of the rotor 2 and fixed to the retaining frame 4, the rotating shaft 7 passes through the retaining frame 4 and is coaxial and fixed with the retaining frame 4, the rotating shaft 7 is rotatably connected to the wheel hub 1, and the brake shoe 6 is arranged on the inner side of the brake drum 5 and fixed to the rotating shaft 7.

[0020] The brake drum 5 is coaxially placed in the water retaining cylinder 8, and the rotating shaft 7 passes through the water retaining cylinder 8 and is fixedly sealed therewith. Two raised circular first water retaining ribs 51 are provided in the circumferential direction of the outer wall of the brake drum 5, and two first water retaining grooves 81 are provided on the inner wall of the water retaining cylinder 8. The space between the two first water retaining grooves 81 forms a cooling chamber 80. Each first water retaining rib 51 extends into a first water retaining groove 81. The cooling pipe 9 works independently in two ways, both of which are connected to the cooling chamber 80. One way sprays cooling medium into the cooling chamber 80, and the other way sucks the cooling medium in the cooling chamber 80.

[0021] A plurality of damping blades 52 arranged at equal intervals are provided on the outer wall of the brake drum 5 . The damping blades 52 are arranged along the axial direction of the brake drum 5 . The damping blades 52 are placed in the middle of the cooling cavity 80 .

[0022] The cooling chamber 80 cools the brake drum and brake shoe. On a long down-wave section, when the sensor detects that the brake drum has steadily risen to the set temperature, the two cooling pipes 9 spray water into the cooling chamber 80 while pumping water out of the cooling chamber 80. At this time, the flowing water cools down and no water accumulates in the cooling chamber 80.

[0023] When it is necessary to enhance the water resistance to assist braking, during the water spraying process, water is not pumped out, and braking is assisted by the water resistance between the damping blade 52 and the water, thereby playing the role of hydraulic deceleration auxiliary braking.

[0024] The structure of the first water retaining groove 81 is as follows: four convex ribs are arranged in the circumferential direction of the inner wall of the water retaining tube 8, two convex ribs form a group, and the first water retaining groove 81 is formed between two convex ribs in each group. To ensure the sealing of the cooling chamber 80, a sealing member 82 is arranged in the first water retaining groove 81.

[0025] The water retaining cylinder 8 in the present invention is a cylinder structure with one end closed and the other end open, the rotating shaft 7 passes through the closed end of the water retaining cylinder 8, and a retaining edge portion 83 bent 90° toward the axial direction is provided at the open end of the water retaining cylinder 8, and the retaining edge portion 83 is placed on one side of the hub 1. A circular second water retaining rib 11 is provided on the inner end surface of the hub 1, and a second water retaining groove is provided on the retaining edge portion 83, and the second water retaining rib 11 is placed in the second water retaining groove.

[0026] The second water retaining rib 11 cooperates with the second water retaining groove to form a second seal. Figure 1 When the seal on the right side of the middle cooling cavity 80 fails, the second seal comes into play, which can further prevent leakage.

[0027] A first water leakage cavity 84 is formed between the retaining edge 83 and the first water retaining groove 81 on the corresponding side. When in use, if the seal on the right side of the cooling cavity 80 fails, water enters the first water leakage cavity 84, and a drainage branch is connected to the first water leakage cavity 84, which can be connected to the branch connected to the cooling cavity 80.

[0028] Similarly, the present invention also sets a second water leakage chamber 85 on the left side of the cooling chamber 80. The structure of the second water leakage chamber 85 is as follows: a baffle 53 is fixed on the brake drum 5, the baffle 53 is coaxially arranged with the water retaining tube 8, and the baffle 53 closes the inner cavity of the brake drum 5, so that the second water leakage chamber 85 is formed between the outer wall of the baffle 53 and the inner wall of the water retaining tube 8. A drainage branch is connected to the second water leakage chamber 85, and the drainage branch can be connected to the branch connected to the cooling chamber 80.

[0029] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. An integrated drum brake and water cooling device for a wheel hub motor, comprising a wheel hub (1), a rotor (2), a stator (3), a retaining frame (4), a brake drum (5), a brake shoe (6) and a rotating shaft (7), wherein the rotor (2) and the brake drum (5) are both fixed to the wheel hub (1), the stator (3) is arranged on the inner side of the rotor (2) and is fixed to the retaining frame (4), the rotating shaft (7) passes through the retaining frame (4) and is rotatably connected to the wheel hub (1), the brake shoe (6) is arranged on the inner side of the brake drum (5) and is fixed to the rotating shaft (7), Features: It also includes a water retaining cylinder (8) and a cooling pipe (9), wherein the brake drum (5) is coaxially arranged in the water retaining cylinder (8), the rotating shaft (7) is fixed to the water retaining cylinder (8), two circular first water retaining ribs (51) are provided in the circumferential direction of the outer wall of the brake drum (5), two first water retaining grooves (81) are provided on the inner wall of the water retaining cylinder (8), a cooling chamber (80) is formed between the two first water retaining grooves (81), each first water retaining rib (51) extends into a first water retaining groove (81), and the cooling pipe (9) is divided into two paths, both of which are connected to the cooling chamber (80), one path sprays cooling medium into the cooling chamber (80), and the other path sucks cooling medium in the cooling chamber (80).

2. The integrated device for in-wheel hub motor drum brake and water cooling as claimed in claim 1, Features: A plurality of damping blades (52) arranged at equal intervals are provided on the outer wall of the brake drum (5); the damping blades (52) are arranged along the axial direction of the brake drum (5); and the damping blades (52) are placed at the middle position of the cooling cavity (80).

3. The integrated device for drum brake and water cooling in wheel hub motor according to claim 1, Features: Four convex ribs are provided in the circumferential direction of the inner wall of the water retaining cylinder (8), two convex ribs form a group, and a first water retaining groove (81) is formed between the two convex ribs in each group.

4. The integrated device for in-wheel hub motor drum brake and water cooling as claimed in claim 1, Features: A sealing member (82) is provided in the first water retaining groove (81).

5. The integrated device for drum brake and water cooling in a hub motor as claimed in claim 1, Features: The water retaining cylinder (8) is a cylinder with one end closed and the other end open, the rotating shaft (7) passes through the closed end of the water retaining cylinder (8), and the open end of the water retaining cylinder (8) is provided with a retaining edge portion (83) bent 90 degrees toward the axial direction, and the retaining edge portion (83) is placed on one side of the wheel hub (1).

6. The integrated device for drum brake and water cooling in a hub motor as claimed in claim 5, Features: A circular second water retaining rib (11) is provided on the inner end surface of the wheel hub (1), a second water retaining groove is provided on the retaining edge portion (83), and the second water retaining rib (11) is placed in the second water retaining groove.

7. The integrated device for drum brake and water cooling in a hub motor as claimed in claim 6, Features: A first water leakage cavity (84) is formed between the retaining edge portion (83) and the first water retaining groove (81) on the corresponding side.

8. The integrated device for drum brake and water cooling in a hub motor as claimed in claim 7, Features: A baffle (53) is fixed on the brake drum (5), the baffle (53) and the water retaining cylinder (8) being coaxially arranged, and the baffle (53) seals the inner cavity of the brake drum (5), so that a second water leakage cavity (85) is formed between the outer wall of the baffle (53) and the inner wall of the water retaining cylinder (8).

9. The integrated device for drum brake and water cooling in a hub motor as claimed in claim 5, Features: The cooling pipe (9) is also provided with two passages correspondingly connected to the first water leakage chamber (84) and the second water leakage chamber (85), and used for sucking the cooling medium in the two water leakage chambers.

Images