Rear axle assembly structure of electric vehicle

Abstract

The utility model relates to the field of sightseeing electric vehicles, in particular to a rear axle assembly structure of an electric vehicle. The driving assembly is installed outside the electric vehicle rear axle shell and used for driving the running electric vehicle. According to the rear axle assembly structure of the electric vehicle, the electric vehicle rear axle shell and the damping mechanism are arranged, shaking impact force generated when a sightseeing bullet train encounters a bumpy road surface in the running process is transmitted to the mounting plate, preliminary damping is achieved through the telescopic sleeve rods below the mounting plate and the damping springs outside, and the shock absorption effect is achieved. The damping reset rods on the two sides of the lower portion of the mounting plate also play a certain buffering and damping role, after the damping reset rods and the mounting plate reduce most impact force, the rest impact force is counteracted through the dampers below the connecting plate, the buffering and damping performance between the whole electric vehicle and the rear axle is enhanced through the multi-layer damping mode, and the service life of the whole electric vehicle is prolonged. And the service life of the rear axle is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicles, in particular to a rear axle assembly structure of an electric vehicle. Background Art

[0002] Electric sightseeing cars, also known as sightseeing electric cars, are a type of electric cars for regional use. They can be divided into tourist sightseeing cars, community house-viewing cars, electric classic cars, and small golf carts. The rear axle of a sightseeing electric car refers to the rear drive shaft component of the vehicle's power transmission. It consists of two half-bridges and can implement half-bridge differential motion. At the same time, it is also a device used to support the wheels and connect the rear wheels.

[0003] After searching, a utility model electric vehicle rear axle subassembly with announcement number CN217917479U is found, including a bridge housing and a sleeve, two sleeves are provided, and the two sleeves are integrally connected on both sides of the bridge housing, the bridge housing and the sleeve are provided with a shaft body that can be rotated transversely, and the two ends of the shaft body pass through the outside of the sleeve, and the outer ring of the shaft body inside the bridge housing is driven and installed with a driven gear, and a lifting plate is provided transversely above the bridge housing, and electric push rods are installed on both sides of the lifting plate, and the extended end of the electric push rod passes through the bottom of the lifting plate. The technical solution of the utility model is to install the motor on the surface of the mounting plate that can be raised and lowered, so that the driving teeth at the bottom are meshed with the driven teeth. When there is no power input to the rear axle, the motor is driven to rise to separate the driving teeth and the driven teeth, so as to prevent the motor and the transmission structure from rotating with the rotation of the rear wheel, reduce the wear on the motor and the transmission structure and reduce vibration, and the rubber block cooperates with the sleeve ring to have a better vibration reduction effect when the shaft rotates.

[0004] During driving, the existing sightseeing electric vehicles may encounter bumpy roads. Due to the bumpy road conditions, the vehicle body rises and falls, which has a greater impact on the rear axle assembly, which is easy to cause damage to the rear axle, affecting the service life of the rear axle and affecting the normal driving of the vehicle. The commonly used rear axle assembly structure has a poor shock-absorbing effect and cannot effectively reduce the impact force on the rear axle when the sightseeing electric vehicle is bumpy. The electric vehicle rear axle sub-assembly in the above-mentioned comparative case is not provided with a shock-absorbing function. Therefore, when in use, the existing technology is generally used to reduce the shock between the electric vehicle and the rear axle by a simple shock-absorbing spring. However, the existing shock-absorbing methods are too simple and the shock-absorbing effect is also poor, which affects the service life of the rear axle.

[0005] Therefore, it is necessary to invent a rear axle assembly structure of an electric vehicle to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a rear axle assembly structure of an electric vehicle, in which when the sightseeing vehicle encounters a bumpy road during driving, the shaking impact force generated is transmitted to the mounting plate, and the telescopic sleeve rod under the mounting plate and the external shock-absorbing spring are used for preliminary shock absorption, and then the damping reset rods on both sides under the mounting plate also play a certain buffering and shock-absorbing role. When the two reduce most of the impact force, the remaining impact force is offset by the damper under the connecting plate. This multi-layer shock-absorbing method strengthens the buffering and shock-absorbing properties between the entire electric vehicle and the rear axle, and increases the service life of the rear axle, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rear axle assembly structure of an electric vehicle, comprising an electric vehicle rear axle housing;

[0008] A driving assembly is installed outside the rear axle housing of the electric vehicle and is used to drive the electric vehicle. A transmission rod is arranged inside the rear axle housing of the electric vehicle, and a hub connecting disc is fixedly installed at one end of the transmission rod. Brake discs are installed at both ends of the rear axle housing of the electric vehicle, and ventilation holes are provided on the outer surfaces of the brake discs.

[0009] Disc brake assembly, installed outside the brake disc, used for braking;

[0010] A shock absorbing mechanism is installed on both sides of the outer shell of the rear axle of an electric vehicle and is used for shock absorption between the electric vehicle and the rear axle. The shock absorbing mechanism comprises a mounting frame, a screw, a nut, a support block, a bolt, a damper, a connecting plate, a sliding rod, a movable frame, a damping reset rod, a telescopic sleeve rod, a shock absorbing spring, and a mounting plate. The mounting frame is sleeved on both sides of the outer shell of the rear axle of the electric vehicle, the mounting frame is penetrated by screws around, one end of the screw is movably connected with a nut, the top of the mounting frame is fixedly connected with a support block, the support block is penetrated by bolts around, a damper is fixedly arranged above the support block, a connecting plate is fixedly installed above the damper, the connecting plate is penetrated by sliding rods around, the sliding rod is fixedly connected to the support block, movable frames are arranged on both sides of the support block, a damping reset rod is arranged inside the movable frame, a telescopic sleeve rod is fixedly installed above the connecting plate, a shock absorbing spring is sleeved on the outside of the telescopic sleeve rod, a mounting plate is fixedly installed on the upper end of the telescopic sleeve rod, and one end of the damping reset rod is movably connected to the mounting plate.

[0011] Preferably, the driving assembly includes a casing, a driving motor, a first gear, and a second gear. The casing is installed on the outside of the rear axle housing of the electric vehicle. The driving motor is fixedly installed on one side of the casing, and the output end of the driving motor is fixedly installed with a first gear. The first gear is provided with two groups, and a second gear is movably connected to one side of the first gear, and the second gear is fixedly connected to a transmission rod.

[0012] Preferably, the disc brake assembly includes a brake caliper, a bayonet, an observation hole, a friction plate, a brake piston housing, and a brake fluid pipe. The brake caliper is installed on the outside of the brake disc, the brake caliper is provided with bayonet pins on the upper and lower sides, an observation hole is opened on the outer surface of the brake caliper, friction plates are provided on both sides of the inside of the brake caliper, a brake piston housing is installed on one side of the outside of the brake caliper, and a brake fluid pipe is fixedly connected to the top of the brake piston housing.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] The setting of the rear axle housing and the shock absorbing mechanism of the electric vehicle improves the shock absorption between the electric vehicle and the rear axle, avoiding large impacts that damage the rear axle and affect the service life of the rear axle. When the sightseeing vehicle encounters bumpy roads during driving, the shaking impact force generated is transmitted to the mounting plate, and the telescopic sleeve rod under the mounting plate and the external shock absorbing spring are used for initial shock absorption. After that, the damping reset rods on both sides under the mounting plate also play a certain role in buffering and shock absorption. When the two reduce most of the impact force, the remaining impact force is offset by the damper under the connecting plate. This multi-layer shock absorption method strengthens the buffering and shock absorption between the entire electric vehicle and the rear axle, and improves the service life of the rear axle.

[0015] Through the setting of brake disc and disc brake assembly, a disc brake assembly is added to the rear axle assembly of the electric vehicle, which not only improves the heat dissipation effect, but also has a strong braking effect. The hydraulic oil is transported to the brake fluid pipe and then enters the brake piston housing, pushing the friction plate to rub against the rotating brake disc to achieve braking. The advantages of the disc brake assembly are simple structure, flexible braking, good heat dissipation, no need to adjust the brake clearance, and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the drive assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the disc brake assembly of the utility model;

[0020] Figure 4This is a schematic diagram of the structure of the shock absorbing mechanism of the utility model;

[0021] Figure 5 This is a schematic diagram of the mounting frame structure of the utility model;

[0022] Figure 6 It is a schematic diagram of the structure of the telescopic sleeve rod and the damping reset rod of the utility model.

[0023] Description of reference numerals:

[0024] 1. Electric vehicle rear axle housing; 2. Drive assembly; 201. Casing; 202. Drive motor; 203. First gear; 204. Second gear; 3. Transmission rod; 4. Hub connecting plate; 5. Brake disc; 6. Ventilation hole; 7. Disc brake assembly; 701. Brake caliper; 702. Bayonet pin; 703. Observation hole; 704. Friction plate; 705. Brake piston housing; 706. Brake fluid pipe; 8. Shock absorbing mechanism; 801. Mounting frame; 802. Screw rod; 803. Nut; 804. Support block; 805. Bolt; 806. Damper; 807. Connecting plate; 808. Slide rod; 809. Movable frame; 810. Damping reset rod; 811. Telescopic sleeve rod; 812. Shock absorbing spring; 813. Mounting plate. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model provides Figure 1-6 The rear axle assembly structure of an electric vehicle shown includes an electric vehicle rear axle housing 1;

[0027] A driving assembly 2 is installed outside the rear axle housing 1 of the electric vehicle and is used to drive the electric vehicle. A transmission rod 3 is provided inside the rear axle housing 1 of the electric vehicle, and a hub connecting disc 4 is fixedly installed at one end of the transmission rod 3. Brake discs 5 are installed at both ends of the rear axle housing 1 of the electric vehicle, and ventilation holes 6 are provided on the outer surfaces of the brake discs 5.

[0028] The disc brake assembly 7 is installed outside the brake disc 5 and is used for braking;

[0029] The shock absorbing mechanism 8 is installed on both sides of the outer shell 1 of the rear axle of the electric vehicle, and is used for shock absorption between the electric vehicle and the rear axle. The shock absorbing mechanism 8 includes a mounting frame 801, a screw 802, a nut 803, a support block 804, a bolt 805, a damper 806, a connecting plate 807, a slide bar 808, a movable frame 809, a damping reset rod 810, a telescopic sleeve rod 811, a shock absorbing spring 812, and a mounting plate 813. The mounting frame 801 is sleeved on both sides of the outer shell 1 of the rear axle of the electric vehicle, and is installed The mounting frame 801 is penetrated by screw rods 802, one end of which is movably connected to a nut 803, the top of the mounting frame 801 is fixedly connected to a support block 804, bolts 805 are penetrated by the support block 804, a damper 806 is fixedly arranged on the top of the support block 804, a connecting plate 807 is fixedly installed on the top of the damper 806, a sliding rod 808 is penetrated by the connecting plate 807, the sliding rod 808 is fixedly connected to the support block 804, and the support block 804 is fixedly provided with a damper 806. Movable frames 809 are provided on both sides, and a damping reset rod 810 is provided inside the movable frame 809. A telescopic sleeve rod 811 is fixedly installed above the connecting plate 807. A shock-absorbing spring 812 is sleeved on the outside of the telescopic sleeve rod 811. A mounting plate 813 is fixedly installed on the upper end of the telescopic sleeve rod 811. One end of the damping reset rod 810 is movably connected with the mounting plate 813. When the sightseeing electric vehicle encounters a bumpy road surface during driving, the shaking impact force generated is transmitted to the mounting plate 813, and the telescopic sleeve rod 811 under the mounting plate 813 and the external shock-absorbing spring 812 are used for preliminary shock absorption. After that, the damping reset rods 810 on both sides under the mounting plate 813 also play a certain buffering and shock-absorbing role. When the two reduce most of the impact force, the remaining impact force is offset by the damper 806 under the connecting plate 807. This multi-layer shock-absorbing method strengthens the buffering and shock-absorbing performance between the entire electric vehicle and the rear axle, and improves the service life of the rear axle.

[0030] like Figure 1 and Figure 2 As shown, the drive assembly 2 includes a housing 201, a drive motor 202, a first gear 203, and a second gear 204. The housing 201 is installed outside the rear axle housing 1 of the electric vehicle. The drive motor 202 is fixedly installed on one side of the housing 201, and the first gear 203 is fixedly installed on the output end of the drive motor 202. Two groups of first gears 203 are provided, and one side of the first gear 203 is movably connected with the second gear 204. The second gear 204 is fixedly connected to the transmission rod 3. By turning on the switch of the drive motor 202, the two groups of first gears 203 are driven to rotate, and the first gear 203 rotates and meshes with the second gear 204 for transmission, so that the transmission rod 3 inside the second gear 204 drives the hub connecting plates 4 at both ends and the wheels to rotate and travel.

[0031] like Figure 1 and Figure 3As shown, the disc brake assembly 7 includes a brake caliper 701, a latch 702, an observation hole 703, a friction plate 704, a brake piston housing 705, and a brake fluid pipe 706. The brake caliper 701 is installed on the outside of the brake disc 5. The brake caliper 701 is provided with latches 702 on the upper and lower sides. The outer surface of the brake caliper 701 is provided with an observation hole 703. The inner sides of the brake caliper 701 are provided with friction plates 704. A brake piston housing 705 is installed on one side of the outer side of the brake caliper 701. A brake fluid pipe 706 is fixedly connected to the upper part of the brake piston housing 705. The hydraulic oil is transported into the brake fluid pipe 706 and then enters the brake piston housing 705, pushing the friction plate 704 to rub against the rotating brake disc 5 to achieve braking. The advantages of the disc brake assembly 7 are simple structure, flexible braking, good heat dissipation, no need to adjust the brake clearance, and easy maintenance.

[0032] The practical working principle of the present invention is as follows: first, the disc brake assembly 7 is installed on the brake disc 5, and then the two sets of mounting frames 801 are sleeved on both sides of the outer shell 1 of the rear axle of the electric vehicle, and the screw 802 is used to penetrate the two sets of mounting frames 801, and then the nut 803 is tightened on one end of the screw 802 to fix the two sets of mounting frames 801 to the outer shell 1 of the rear axle of the electric vehicle, and then the support block 804 is placed on the mounting frame 801, and the bolt 805 penetrates the support block 804 and the mounting frame 801 to be installed and fixed, and when the installation is completed, the mounting plate 813 at the top of the support block 804 is assembled with the bottom of the sightseeing electric vehicle, and finally the wheel hub connecting disk 4 at both ends of the rear axle shell 1 of the electric vehicle is connected with the wheel hub, and then the external power supply is turned on, and the switch of the driving motor 202 is turned on to drive the two sets of first gears 203 to rotate, and the first gear 203 rotates and meshes with the second gear 204 to drive, so that the transmission rod 3 inside the second gear 204 drives the wheel hub connecting disk 4 at both ends and the wheel to rotate and drive, when the sightseeing electric vehicle encounters a bumpy road during driving. The generated shaking impact force is transmitted to the mounting plate 813, and the telescopic sleeve rod 811 under the mounting plate 813 and the external shock-absorbing spring 812 are used for preliminary shock absorption. Then, the damping reset rods 810 on both sides below the mounting plate 813 are connected to the support block 804, which also plays a certain buffering and shock-absorbing role. At this time, the two layers of shock absorption reduce most of the impact force, and finally the damper 806 under the connecting plate 807 offsets the remaining impact force. This multi-layer shock absorption method strengthens the buffering and shock absorption between the entire electric vehicle and the rear axle, and improves the service life of the rear axle. When the sightseeing electric vehicle needs to brake, by pressing the brake handle, the hydraulic oil is transported to the brake fluid pipe 706 and then enters the brake piston housing 705, pushing the friction plate 704 to rub against the rotating brake disc 5 to achieve braking. The advantages of the disc brake assembly 7 are simple structure, flexible braking, good heat dissipation, no need to adjust the brake clearance, and easy maintenance. In this way, the use process of the rear axle assembly structure of the electric vehicle is completed.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rear axle assembly structure of an electric vehicle, characterized in that: The electric vehicle rear axle housing (1) is included; A drive assembly (2) is mounted outside the rear axle housing (1) of the electric vehicle and is used to drive the electric vehicle. A transmission rod (3) is disposed inside the rear axle housing (1) of the electric vehicle. A wheel hub connecting disc (4) is fixedly mounted on one end of the transmission rod (3). Brake discs (5) are mounted on both ends of the rear axle housing (1) of the electric vehicle. Ventilation holes (6) are provided on the outer surfaces of the brake discs (5). A disc brake assembly (7), mounted outside the brake disc (5) and used for braking; A shock absorbing mechanism (8) is mounted on both sides of the exterior of an electric vehicle rear axle housing (1) and is used for shock absorption between the electric vehicle and the rear axle. The shock absorbing mechanism (8) comprises a mounting frame (801), a screw rod (802), a nut (803), a support block (804), a bolt (805), a damper (806), a connecting plate (807), a sliding rod (808), a movable frame (809), a damping reset rod (810), a telescopic sleeve rod (811), a shock absorbing spring (812), and a mounting plate (813). The mounting frame (801) is sleeved on both sides of the exterior of the electric vehicle rear axle housing (1). The mounting frame (801) is penetrated by screw rods (802) on all sides. One end of the screw rod (802) is movably connected to a nut (803). The top of the mounting frame (801) is fixedly connected to a support block (804). The support block (804) ), a damper (806) is fixedly arranged above the support block (804), a connecting plate (807) is fixedly installed above the damper (806), a sliding rod (808) is passed through the connecting plate (807) around the connecting plate (807), the sliding rod (808) is fixedly connected to the support block (804), movable frames (809) are arranged on both sides of the support block (804), a damping reset rod (810) is arranged inside the movable frame (809), a telescopic sleeve rod (811) is fixedly installed above the connecting plate (807), a shock absorbing spring (812) is sleeved on the outside of the telescopic sleeve rod (811), a mounting plate (813) is fixedly installed on the upper end of the telescopic sleeve rod (811), and one end of the damping reset rod (810) is movably connected to the mounting plate (813).

2. The rear axle assembly structure of an electric vehicle according to claim 1, characterized in that: The driving assembly (2) comprises a housing (201), a driving motor (202), a first gear (203), and a second gear (204); the housing (201) is mounted outside the rear axle housing (1) of the electric vehicle; the driving motor (202) is fixedly mounted on one side of the housing (201); the output end of the driving motor (202) is fixedly mounted with a first gear (203); two groups of the first gears (203) are provided; one side of the first gear (203) is movably connected to a second gear (204); and the second gear (204) is fixedly connected to a transmission rod (3).

3. The rear axle assembly structure of an electric vehicle according to claim 1, characterized in that: The disc brake assembly (7) comprises a brake caliper (701), a latch (702), an observation hole (703), a friction plate (704), a brake piston housing (705), and a brake fluid pipe (706). The brake caliper (701) is mounted on the outside of the brake disc (5). The brake caliper (701) is provided with latches (702) on the upper and lower sides. The external surface of the brake caliper (701) is provided with an observation hole (703). The internal sides of the brake caliper (701) are provided with friction plates (704). A brake piston housing (705) is mounted on one side of the outside of the brake caliper (701). The upper side of the brake piston housing (705) is fixedly connected with a brake fluid pipe (706).

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