Electric parallel axle assembly with independent rainproof parking brake

Abstract

The invention relates to an electric parallel axle assembly with an independent rainproof parking brake, and belongs to the technical field of automobile manufacturing. The left side and the right side of a drive axle are each provided with a rim and a tire, and the rims are connected with the tires; the parallel shaft gearbox is connected with the drive axle, a mounting flange of the parallel shaft gearbox is connected with a drive motor, power of the drive motor is transmitted to a differential mechanism of the parallel shaft gearbox, and the power is output to the drive axle through the differential mechanism; the parking brake assembly is connected with an input shaft of the parallel shaft gearbox so as to carry out parking brake on tires; the brake drum assemblies are arranged on the left side and the right side of the drive axle, connected with the rims and used for outputting power of the drive motor to the rims so as to conduct parking brake on the tires. Independent service braking and concentrated parking braking are adopted, the parking braking capacity meeting the larger requirement is provided for the whole machine, a parking braking mechanism on the brake drum assembly is omitted, the structure is simplified, and the service braking reliability is enhanced.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, and more specifically to an electric parallel bridge assembly with an independent rainproof parking brake. Background Technology

[0002] Traditional 4.5-ton electric parallel axle assemblies use a single unit for both the service and parking brakes, located on the rearmost brake drum and directly connected to the wheel rim and tire. This requires a very large braking torque. Because the service and parking brakes use the same actuator structure, and the lever mechanism of the parking brake is very complex with a limited lever ratio, the handbrake's operating force often exceeds the standard requirements, or it may fail to stop on a slope. This necessitates repeated break-in of the brakes. If there is a severe imbalance in braking force between the left and right brakes, the clearance of the parking brake must be repeatedly adjusted to achieve parking on a slope with a full load. Summary of the Invention

[0003] The purpose of this invention is to provide an electric parallel bridge assembly with an independent rainproof parking brake. This electric parallel bridge assembly employs an independent service brake and a centrally located parking brake. The parking brake assembly is positioned at the input end of the transmission. Through the amplification effect of the transmission and the meshing of the transmission gears, the required braking torque is minimized, resulting in the most reliable braking and providing greater parking braking capacity for the entire machine. The parking brake assembly also features a rainproof cover to reduce the impact of rainwater on its braking performance. The parking brake mechanism on the brake drum assembly is eliminated, simplifying the structure and enhancing the reliability of the service brake.

[0004] To achieve the above objectives, the present invention provides an electric parallel bridge assembly with an independent rainproof parking brake, the electric parallel bridge assembly comprising: A drive axle, wherein rims and tires are provided on both the left and right sides of the drive axle, and the rims are connected to the tires; A parallel-shaft gearbox, wherein the parallel-shaft gearbox is connected to the drive axle; A drive motor is connected to the mounting flange of the parallel shaft gearbox. The power of the drive motor is transmitted to the differential of the parallel shaft gearbox, and the power is output to the drive axle through the differential. A parking brake assembly, which is connected to the input shaft of the parallel shaft gearbox, to apply parking brake to the tires; The brake drum assembly is located on the left and right sides of the drive axle and connected to the wheel rim. It is used to output the power of the drive motor to the wheel rim to brake the tires during parking.

[0005] Optionally, the parallel shaft gearbox includes: A shaft assembly, the shaft assembly including a first gear, the first gear being sleeved on the input shaft; A shaft II assembly, the shaft II assembly including a second gear and a third gear, wherein the second gear meshes with the first gear; A third shaft assembly, the third shaft assembly including a fourth gear and a fifth gear, the fourth gear meshing with the third gear.

[0006] Optionally, the parallel shaft gearbox further includes a N-shaft assembly connected to the differential for outputting power from the drive motor to the left and right half-shafts of the drive axle; The N-axis assembly includes: The sixth gear meshes with the fifth gear; Two half-shaft gears mesh with the left and right half-shafts of the drive axle, respectively.

[0007] Optionally, the parking brake assembly includes: The cable connects to the handbrake lever at one end. A pull rod, one end of which is connected to the other end of a cable. When the cable is pulled up, the pull rod rotates with the pin. A cross brace is provided at the notch of the pull rod. When the pull rod rotates, it pushes the left end of the cross brace. The first front brake shoe is hinged to the pull rod by a pin, so that the upper end of the first front brake shoe opens to the left under the counter-push action when the pin rotates. The first rear brake shoe is located at the right end of the cross brace. When the left end of the cross brace is pushed by the pull rod, the upper end of the first rear brake shoe opens to the right, cooperating with the first front brake shoe to squeeze the wheel drum and achieve braking.

[0008] Optionally, the parking brake assembly includes: The front return spring is connected to the first front brake shoe; The rear return spring is connected to the first rear brake shoe. When the cable is released, the rear return spring and the front return spring respectively pull the first front brake shoe and the first rear brake shoe back to their original positions.

[0009] Optionally, the parking brake assembly includes: A first clearance adjuster is disposed between the lower ends of the first front brake shoe and the first rear brake shoe to adjust the clearance between the first front brake shoe, the first rear brake shoe and the wheel drum.

[0010] Optionally, a rain cover is provided on the outside of the parking brake assembly to prevent rainwater from entering and affecting braking performance.

[0011] Optionally, the brake drum assembly includes: The second front brake shoe is located on one side of the mounting plate; The second rear brake shoe is located on the other side of the mounting plate; The brake caliper is mounted on the mounting plate and positioned between the upper ends of the second front brake shoe and the second rear brake shoe. After the brake fluid enters the brake caliper and pushes out the ball joints at both ends of the brake caliper, it opens the second front brake shoe and the second rear brake shoe to the sides and presses them against the brake drum, generating friction to slow down the brakes.

[0012] Optionally, the brake drum assembly includes: The second clearance adjuster is disposed between the lower ends of the second front brake shoe and the second rear brake shoe to adjust the clearance between the second front brake shoe, the second rear brake shoe and the brake drum. The spring self-adjusting mechanism is connected to the second gap adjuster and works with the second gap adjuster to adjust the gap between the second front brake shoe, the second rear brake shoe and the brake drum.

[0013] Through the above technical solution, the present invention provides an electric parallel axle assembly with an independent rainproof parking brake. Wheel rims and tires are provided on both sides of the drive axle, with the rims connected to the tires. A parallel shaft gearbox is connected to the drive axle, and a drive motor is connected to the mounting flange of the parallel shaft gearbox. The drive motor transmits power to the differential of the parallel shaft gearbox, which then outputs power to the drive axle. The parking brake assembly is connected to the input shaft of the parallel shaft gearbox to apply parking brake to the tires. Brake drum assemblies are located on both sides of the drive axle and connected to the wheel rims, used to output power from the drive motor to the wheel rims for parking brake application to the tires. The electric parallel bridge assembly adopts an independent service brake and a centralized parking brake. The parking brake assembly is located at the input end of the gearbox. Through the amplification effect of the gearbox and the meshing of the gearbox gears, the required braking torque is minimized and the braking is most reliable, providing greater parking braking capacity for the whole machine. The parking brake assembly also has a rain cover to reduce the impact of rainwater on the braking performance of the parking brake assembly. The parking brake mechanism on the brake drum assembly is eliminated, simplifying the structure and enhancing the reliability of the service brake. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall schematic diagram of an electric parallel bridge assembly according to one embodiment of the present invention; Figure 2This is a schematic diagram of an electric parallel bridge assembly according to one embodiment of the present invention; Figure 3 This is a schematic diagram of an electric parallel bridge assembly according to one embodiment of the present invention; Figure 4 This is a schematic diagram of a parallel shaft gearbox according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the N-axis assembly according to one embodiment of the present invention; Figure 6 This is a schematic diagram of a parking brake assembly according to one embodiment of the present invention; Figure 7 This is a schematic diagram of a brake drum assembly according to one embodiment of the present invention; Figure 8 This is a schematic diagram of a service brake according to one embodiment of the present invention.

[0015] Explanation of reference numerals in the attached figures Detailed Implementation

[0016] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0017] In embodiments of the present invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0018] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0019] like Figure 1 The diagram shown is an overall schematic diagram of an electric parallel bridge assembly according to one embodiment of the present invention. Figure 2 The diagram shown is a schematic representation of an electric parallel bridge assembly according to one embodiment of the present invention. Figure 3The diagram shown is a schematic representation of an electric parallel bridge assembly according to one embodiment of the present invention. Figures 1 to 3 The electric parallel axle assembly includes a drive axle 4, a parallel shaft gearbox 1, a drive motor 2, a parking brake assembly 3, and a brake drum assembly 5. The drive axle 4 has rims 7 and tires 8 on both sides, with the rims 7 connected to the tires 8. The parallel shaft gearbox 1 is connected to the drive axle 4. The drive motor 2 is connected to the mounting flange 1-1 of the parallel shaft gearbox 1, and the power from the drive motor 2 is transmitted to the differential 1-3 of the parallel shaft gearbox 1, which then outputs power to the drive axle 4. The parking brake assembly 3 is connected to the input shaft 1-2 of the parallel shaft gearbox 1 to apply parking brake to the tires 8. The brake drum assembly 5 is located on both sides of the drive axle 4 and is connected to the rims 7 and tires 8 via rim bolts 6 at both ends, used to transmit power from the drive motor 2 to the rims 7 to apply parking brake to the tires 8. This invention simplifies the structure and enhances the reliability of the service brake by eliminating the parking brake structure on the brake drum assembly 5. The parking brake assembly 3 and the brake drum assembly 5 are set separately. The parking brake assembly 3 is located at the input end of the gearbox. Through the amplification effect of the gearbox and the meshing of the gearbox gears, the required braking torque is minimized and the braking is most reliable, providing the greater parking braking capacity required for the whole machine and avoiding the situation where the original structure brake cannot stop on a full load slope.

[0020] In this embodiment, the parallel shaft gearbox 1 includes a shaft assembly 1-7, a shaft assembly 1-6, a shaft assembly 1-5, and a shaft assembly 1-4. Specifically, the shaft assembly 1-7 includes a first gear 1-7-1, which is mounted on the input shaft 1-2. The input shaft 1-2 also has a front bearing 1-7-2 and a rear bearing 1-7-3 at both ends. The shaft assembly 1-6 includes a second gear 1-6-1 and a third gear 1-6-2, with the second gear 1-6-1 meshing with the first gear 1-7-1. The shaft assembly 1-6 also has a front bearing 1-6-3 and a rear bearing 1-6-4 at both ends. The shaft assembly 1-5 includes a fourth gear 1-5-1 and a fifth gear 1-5-2, with the fourth gear 1-5-1 meshing with the third gear 1-6-2. The shaft assembly 1-5 also has a front bearing 1-5-3 and a rear bearing 1-6-4 at both ends. -5-4; The IV shaft assembly 1-4 is connected to the differential 1-3, used to output the power of the drive motor 2 to the left half-shaft 4-1 and right half-shaft 4-2 of the drive axle 4; the IV shaft assembly 1-4 includes a sixth gear 1-4-1, which meshes with the fifth gear 1-5-2, and also includes two half-shaft gears 1-4-2, which mesh with the left half-shaft 4-1 and right half-shaft 4-2 of the drive axle 4 respectively, as well as planetary gears 1-4-3 of the two differentials 1-3. Through the multi-shaft gear transmission of the parallel shaft gearbox 1, the parking brake assembly 3 located at the input end of the parallel shaft gearbox 1 is amplified by the meshing of the gearbox gears, thereby providing a greater parking braking capacity as required. The parallel shaft gearbox 1 can be configured according to... Figure 4 and Figure 5 As shown.

[0021] In this embodiment, the parking brake assembly 3 includes a cable 3-7, a lever 3-2, a first front brake shoe 3-4, a first rear brake shoe 3-6, a front return spring 3-8, a rear return spring 3-9, and a first clearance adjuster 3-5. Specifically, one end of the cable 3-7 is connected to the handbrake lever, and one end 3-2-1 of the lever 3-2 is connected to the other end of the cable 3-7. When the handbrake is engaged, the handbrake lever is pulled up, and the cable 3-7 is also engaged, causing the lever 3-2 to rotate with the pin 3-2-2. A cross brace 3-3 is provided at the lever notch 3-2-3 of the lever 3-2. When the lever 3-2 rotates, it pushes the left end of the cross brace 3-3, allowing the first front brake shoe 3-4 to pass through. The first front brake shoe 3-4 is hinged to the tie rod 3-2 via the pin 3-2-2. Under the counter-pushing action of the pin 3-2-2 rotating, the upper end of the first front brake shoe 3-4 opens to the left. The first rear brake shoe 3-6 is located at the right end of the cross brace 3-3. When the left end of the cross brace 3-3 is pushed by the tie rod 3-2, the upper end of the first rear brake shoe 3-6 opens to the right. Together with the first front brake shoe 3-4, they press against the wheel drum 3-1 to achieve the braking effect. When the parking brake is released, the handbrake is released, and cable 3-7 is released. The front return spring 3-8 connects to the first front brake shoe 3-4, and the rear return spring 3-9 connects to the first rear brake shoe 3-6. When cable 3-7 is released, the rear return spring 3-9 and the front return spring 3-8 respectively pull the first front brake shoe 3-4 and the first rear brake shoe 3-6 back to their original positions. The first clearance adjuster 3-5 is located between the lower ends of the first front brake shoe 3-4 and the first rear brake shoe 3-6 to adjust the clearance between the first front brake shoe 3-4, the first rear brake shoe 3-6, and the wheel drum 3-1. Parking braking is achieved by opening and closing the first front brake shoe 3-4 and the first rear brake shoe 3-6. This parking brake assembly 3 can be adjusted according to… Figure 6 As shown.

[0022] In this embodiment, a rain shield is provided on the outside of the parking brake assembly 3 to prevent rainwater from entering and affecting braking performance.

[0023] In this embodiment, the brake drum assembly 5 includes components such as a service brake 5-1, a brake drum 5-2, a large bearing 5-3, a small bearing 5-4, and an oil seal 5-5. The service brake 5-1 includes a second front brake shoe 5-1-5, a second rear brake shoe pump 5-1-2, a brake caliper 5-1-1, a second clearance adjuster 5-1-4, and a spring self-adjusting mechanism 5-1-6. Specifically, the second front brake pad 5-1-5 is located on one side of the mounting plate 5-1-3, the second rear brake pad pump 5-1-2 is located on the other side of the mounting plate 5-1-3, and the brake caliper 5-1-1 is located on the mounting plate 5-1-3, between the upper ends of the second front brake pad 5-1-5 and the second rear brake pad pump 5-1-2. After the brake fluid enters the brake caliper 5-1-1 and pushes out the ball joints at both ends of the brake caliper 5-1-1, the second front brake pad 5-1-5 and the second rear brake pad pump 5-1-2 are opened to both sides, pressing... Friction is generated in the brake drum 5-2 to slow it down. A second clearance adjuster 5-1-4 is positioned between the lower ends of the second front brake shoe 5-1-5 and the second rear brake shoe pump 5-1-2 to adjust the clearance between the second front brake shoe 5-1-5, the second rear brake shoe pump 5-1-2, and the brake drum 5-2. A spring self-adjusting mechanism 5-1-6 is connected to the second clearance adjuster 5-1-4 and works in conjunction with the second clearance adjuster 5-1-4 to adjust the clearance between the second front brake shoe 5-1-5, the second rear brake shoe pump 5-1-2, and the brake drum 5-2. In one example of this invention, the brake drum assembly 5 eliminates the original parking brake structure, simplifying the structure and reducing the failure rate. Specifically, it can be as follows... Figure 7 and Figure 8 As shown.

[0024] Through the above technical solution, the present invention provides an electric parallel axle assembly with an independent rainproof parking brake. Wheel rims 7 and tires 8 are provided on both sides of the drive axle 4, with the wheel rims 7 connected to the tires 8. A parallel shaft gearbox 1 is connected to the drive axle 4. A drive motor 2 is connected to the mounting flange 1-1 of the parallel shaft gearbox 1. The power of the drive motor 2 is transmitted to the differential 1-3 of the parallel shaft gearbox 1, and the power is output to the drive axle 4 through the differential 1-3. The parking brake assembly 3 is connected to the input shaft 1-2 of the parallel shaft gearbox 1 to apply parking brake to the tires 8. Brake drum assemblies 5 are located on both sides of the drive axle 4 and connected to the wheel rims 7, used to output the power of the drive motor 2 to the wheel rims 7 to apply parking brake to the tires 8. The electric parallel bridge assembly adopts an independent service brake and a centralized parking brake. The parking brake assembly 3 is located at the input end of the gearbox. Through the amplification effect of the gearbox and the meshing of the gearbox gears, the required braking torque is minimized and the braking is most reliable, providing greater parking braking capacity for the whole machine. The parking brake assembly 3 also has a rain cover to reduce the impact of rainwater on the braking performance of the parking brake assembly 3 during rain. The parking brake mechanism on the brake drum assembly 5 is eliminated, simplifying the structure and enhancing the reliability of the service brake.

[0025] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention. This includes combining various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations. However, these simple modifications and combinations should also be considered as part of the content disclosed in this invention and are all within the protection scope of this invention.

Claims

1. An electric parallel axle assembly with an independent rainproof parking brake, characterized in that, The electric parallel bridge assembly includes: A drive axle, wherein rims and tires are provided on both the left and right sides of the drive axle, and the rims are connected to the tires; A parallel-shaft gearbox, wherein the parallel-shaft gearbox is connected to the drive axle; A drive motor is connected to the mounting flange of the parallel shaft gearbox. The power of the drive motor is transmitted to the differential of the parallel shaft gearbox, and the power is output to the drive axle through the differential. A parking brake assembly, which is connected to the input shaft of the parallel shaft gearbox, to apply parking brake to the tires; The brake drum assembly is located on the left and right sides of the drive axle and connected to the wheel rim. It is used to output the power of the drive motor to the wheel rim to brake the tires during parking.

2. The electric parallel bridge assembly according to claim 1, characterized in that, The parallel shaft gearbox includes: A shaft assembly, the shaft assembly including a first gear, the first gear being sleeved on the input shaft; A shaft II assembly, the shaft II assembly including a second gear and a third gear, wherein the second gear meshes with the first gear; A third shaft assembly, the third shaft assembly including a fourth gear and a fifth gear, the fourth gear meshing with the third gear.

3. The electric parallel bridge assembly according to claim 2, characterized in that, The parallel shaft gearbox also includes a N-shaft assembly connected to the differential, used to output power from the drive motor to the left and right half-shafts of the drive axle; The N-axis assembly includes: The sixth gear meshes with the fifth gear; Two half-shaft gears mesh with the left and right half-shafts of the drive axle, respectively.

4. The electric parallel bridge assembly according to claim 1, characterized in that, The parking brake assembly includes: The cable connects to the handbrake lever at one end. A pull rod, one end of which is connected to the other end of a cable. When the cable is pulled up, the pull rod rotates with the pin. A cross brace is provided at the notch of the pull rod. When the pull rod rotates, it pushes the left end of the cross brace. The first front brake shoe is hinged to the pull rod by a pin, so that the upper end of the first front brake shoe opens to the left under the counter-pushing action when the pin rotates. The first rear brake shoe is located at the right end of the cross brace. When the left end of the cross brace is pushed by the pull rod, the upper end of the first rear brake shoe opens to the right, cooperating with the first front brake shoe to squeeze the wheel drum and achieve braking.

5. The electric parallel bridge assembly according to claim 4, characterized in that, The parking brake assembly includes: The front return spring is connected to the first front brake shoe; The rear return spring is connected to the first rear brake shoe. When the cable is released, the rear return spring and the front return spring respectively pull the first front brake shoe and the first rear brake shoe back to their original positions.

6. The electric parallel bridge assembly according to claim 5, characterized in that, The parking brake assembly includes: A first clearance adjuster is disposed between the lower ends of the first front brake shoe and the first rear brake shoe to adjust the clearance between the first front brake shoe, the first rear brake shoe and the wheel drum.

7. The electric parallel bridge assembly according to claim 1, characterized in that, The parking brake assembly is equipped with a rain cover on the outside to prevent rainwater from entering and affecting braking performance.

8. The electric parallel bridge assembly according to claim 1, characterized in that, The brake drum assembly includes: The second front brake pad is located on one side of the mounting plate; The second rear brake shoe is located on the other side of the mounting plate; The brake caliper is mounted on the mounting plate and positioned between the upper ends of the second front brake shoe and the second rear brake shoe. After the brake fluid enters the brake caliper and pushes out the ball joints at both ends of the brake caliper, it opens the second front brake shoe and the second rear brake shoe to the sides and presses them against the brake drum, generating friction to slow down the brakes.

9. The electric parallel bridge assembly according to claim 8, characterized in that, The brake drum assembly includes: The second clearance adjuster is disposed between the lower ends of the second front brake shoe and the second rear brake shoe to adjust the clearance between the second front brake shoe, the second rear brake shoe and the brake drum. The spring self-adjusting mechanism is connected to the second gap adjuster and works with the second gap adjuster to adjust the gap between the second front brake shoe, the second rear brake shoe and the brake drum.

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