An electric vehicle rear axle commissioning detection device

Abstract

The application relates to the technical field of automobile detection equipment, in particular to a running detection device for a rear axle of an electric automobile. The specific technical scheme is as follows: a running detection device for a rear axle of an electric automobile, which comprises clamping mechanisms for clamping and fixing two ends of the rear axle, each of the clamping mechanisms is detachably connected to a bearing seat, the bearing seat is arranged on a base, a driving mechanism for driving the two bearing seats to move simultaneously is arranged on the base, and a driving motor for driving the rear axle to run is arranged on the base. The application solves the problem that the prior art cannot fix rear axles of different sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile detection equipment, and in particular to a rear axle trial operation detection device for an electric vehicle. Background Art

[0002] The rear axle is a critical component of a vehicle, and its performance directly impacts driving safety. Testing can promptly identify and eliminate potential safety hazards, ensuring the vehicle does not experience loss of control or malfunction during driving.

[0003] In the existing technology, the two ends of the rear axle are usually fixed by bearings, and then the rear axle is driven to run in order to realize the detection of its related performance; there is also a way to fix the rear axle by fixing the drive shaft of the rear axle. The first fixing method is only applicable to the fixing of rear axles of the same size. However, there are certain differences in the size of the wheel hubs of vehicles of different brands and models. When the size changes, it is impossible to fix the rear axle of another size through bearings; the second fixing method is to fix the drive shaft. Therefore, the two ends of the rear axle are in a suspended state. When the rear axle is driven for trial operation, after the drive shaft reaches a certain speed, the two ends of the rear axle may shake, which in turn leads to large detection errors. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a test run detection device for the rear axle of an electric vehicle, which solves the problem in the prior art that rear axles of different sizes cannot be fixed.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention discloses a rear axle trial operation detection device for an electric vehicle, comprising a clamping mechanism for clamping and fixing the two ends of the rear axle respectively, wherein each of the clamping mechanisms is detachably connected to a bearing seat, the bearing seat is arranged on a base, the base is provided with a driving mechanism for driving the two bearing seats to move simultaneously, and the base is provided with a driving motor for driving the rear axle to operate.

[0007] Preferably, each of the bearing seats includes a first bearing and a fixed seat fixed to the bottom of the outer ring of the first bearing, a pillar is provided at the bottom of the fixed seat, a slide groove is provided on the base along the movement direction of the bearing seat, one end of the two pillars extends into the slide groove, and the driving mechanism includes a first screw rod that is rotatably connected in the slide groove and passes through the two pillars, the pillars are threadedly connected to the first screw, the pillars are located at both ends of the first screw rod, the threads on the first screw rod that drive the two pillars to move have opposite rotation directions, and the first screw rod is driven by a first motor.

[0008] Preferably, the clamping mechanism is provided with a mounting plate, the inner ring of the first bearing is provided with a fixed plate, the fixed plate is vertically provided with a waist-shaped hole at a position corresponding to the mounting plate, and the mounting plate is internally provided with a built-in first nut corresponding to the waist-shaped hole and connected by a bolt.

[0009] Preferably, the clamping mechanism comprises mounting blocks arranged in parallel, and the corresponding surfaces of the two mounting blocks are provided with arc-shaped grooves, the two ends of the rear axle are arranged in the arc-shaped grooves, and the two ends of the rear axle are locked and fixed by second screws on both sides of the arc-shaped grooves; the second screws pass through the two mounting blocks and are fixed to one of the mounting blocks through a second bearing and driven by a second motor arranged on the mounting block, and one end of the second screw extending out of the other mounting block is adapted with a second nut.

[0010] Preferably, the second nut is provided with a backing plate at one end close to the mounting block, and the side wall of the support column is provided with a stabilizing plate in contact with the top surface of the base.

[0011] Preferably, the base is provided with a guide groove parallel to the sliding groove, the guide groove is provided with a guide rod parallel to the first screw, the bottom end of the support column is provided with a notch, the notch corresponds to the sliding groove and the guide groove, the bottom end of the support column extends into the sliding groove and the guide groove respectively, and the guide rod passes through the support column and is arranged with a gap.

[0012] Preferably, when the mounting blocks fix the two ends of the rear axle and leave cavities on both sides of the arc-shaped groove, the mounting blocks are respectively provided with fixing mechanisms for abutting against the two ends of the rear axle, and one end of the fixing mechanism abuts against the two ends of the rear axle from the cavities on both sides of the arc-shaped groove.

[0013] Preferably, the fixing mechanism comprises a movable rod and a pressing block hinged to one end of the movable rod, the inner wall of the cavity on both sides of the arc-shaped groove is provided with a limiting groove, the pressing block is arranged in the limiting groove, the movable rod passes through the mounting block and extends out of the mounting block; the two movable rods on the same mounting block are connected by a connecting rod, and the connecting rod and the mounting block are fixed by a bolt.

[0014] Preferably, the mounting block is vertically provided with a movable hole communicating with the limiting groove, the movable rod passes through the movable hole, the sizes of the two ends of the movable hole are smaller than the size of the middle part of the movable hole, a spring is arranged on the movable rod at the middle part of the movable hole, a baffle is arranged on the movable rod above the middle part of the movable hole close to the spring, and one end of the spring abuts against the baffle.

[0015] Preferably, the base is provided with a support column below the transmission shaft at both ends of the rear axle gear box, the support column is provided with a fastener for fixing the transmission shaft.

[0016] The present application has the following advantages:

[0017] The present application can adapt to the fixation of rear axle of different sizes by using the clamping mechanism of the present application, compared with directly fixing the two ends of the rear axle on the first bearing. Meanwhile, the distance between the two bearing seats can be adjusted according to the length of the entire rear axle, and the stability plate is fixed with the base through bolts, thereby increasing the stability of the rear axle during the trial operation. Compared with the prior art which can only fix one size of hub, the automobile rear axle trial operation detection device disclosed by the present application has wide application range and can fix hubs or connecting shafts of different sizes and rear axles of different lengths, and is simple and convenient to operate and disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the present application;

[0019] Figure 2 is a side view of the bearing seat;

[0020] Figure 3 is Figure 1 is a view of the clamping mechanism in A-A direction;

[0021] Figure 4 is Figure 3 is a schematic view of the present application after removing the hub or connecting seat;

[0022] Figure 5 is a view of the connecting side of the clamping mechanism and the bearing seat;

[0023] Figure 6 is a schematic view of another embodiment of the clamping mechanism (the fixing mechanism on the upper mounting block is in abutment with the side of the rear axle hub or connecting seat);

[0024] In the figure: rear axle 1, base 2, first bearing 3, fixed seat 4, support column 5, sliding groove 6, first screw 7, first motor 8, mounting plate 9, fixed plate 10, waist-shaped hole 11, first nut 12, mounting block 13, arc-shaped groove 14, second screw 15, second bearing 16, second motor 17, second nut 18, pad 19, stability plate 20, notch 21, cavity 22, movable rod 23, pressing block 24, limiting groove 25, connecting rod 26, movable hole 27, spring 28, baffle 29, support column 30, fastener 31. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0027] refer to Figure 1-Figure 5 The present invention discloses a test run detection device for the rear axle of an electric vehicle. The device comprises a clamping mechanism for clamping and fixing each end of the rear axle 1. Each clamping mechanism is detachably connected to a bearing seat. The bearing seats are mounted on a base 2. The base 2 is provided with a drive mechanism for driving the two bearing seats to move simultaneously. The base 2 is provided with a drive motor (not shown) for driving the rear axle 1. It should be noted that a wheel hub or a wheel hub connector is fixed at each end of the rear axle. The present invention fixes the wheel hub or wheel hub connector, if present. The outer contours of the connector and the wheel hub are both circular. The drive motor is used to drive the rear axle. The specific connection method is conventional and will not be described in detail. The rear axle is mounted between two bearing seats. By adjusting the distance between the two bearing seats, rear axles of different lengths can be fixed, thereby expanding its range of use. Furthermore, the clamping mechanism is adjustable and can fix wheel hubs or connectors of different sizes, enabling the detection device disclosed in the present invention to perform test runs on rear axles of different sizes.

[0028] Furthermore, each bearing seat includes a first bearing 3 and a fixed seat 4 fixed to the bottom of the outer ring of the first bearing 3. The fixed seat can be annular and fit over the outer ring of the first bearing, or it can be arc-shaped and fixed directly to the bottom of the first bearing, depending on the specific needs. A support 5 is provided at the bottom of the fixed seat 4. A slide 6 is provided on the base 2 along the direction of movement of the bearing seat, i.e., the direction of the slide 6 is consistent with the fixed direction of the rear axle. One end of each support 5 extends into the slide 6. The drive mechanism includes a first screw 7 that is rotatably connected within the slide 6 and extends through the two supports 5. The supports 5 are threadedly connected to the first screw 7. The supports 5 are located near the ends of the first screw 7. The threads on the first screw 7 that drive the two supports 5 have opposite rotation directions, and the first screw 7 is driven by a first motor 8. It should be noted that the threads on the first screw connecting the two supports have opposite rotation directions, so that when the first screw rotates, the two supports move toward or away from each other simultaneously. As one embodiment, the two ends of the first screw are fixed to the two ends of the slide groove by bearings, and a gear is sleeved on the middle part of the first screw, and meshes with the driving gear on the first motor, thereby realizing the rotation of the first screw. In addition, in order to ensure the stability of the first screw, a support seat is provided on the first screw on both sides of the gear, and the first screw and the support seat can be fixed by bearings, that is, the first screw passes through the support seat, and a bearing is provided in the through hole. Furthermore, in order to increase the stability of the bearing seat running on the base, and the stability of the bearing seat on the base, a stabilizing plate 20 in contact with the top surface of the base 2 is provided on the side wall of the pillar 5. The stabilizing plate can be arranged circumferentially around the pillar, and the number and size of the stabilizing plate can be set according to actual conditions. Furthermore, after the adjustment of the bearing seat is completed, the stabilizing plate can be fixed to the base by bolts.

[0029] Furthermore, to secure the clamping mechanism to the bearing seat, the clamping mechanism is provided with a mounting plate 9. A fixing plate 10 is provided in the inner ring of the first bearing 3. A waist-shaped hole 11 is vertically provided on the fixing plate 10 at a position corresponding to the mounting plate 9. A first nut 12 is embedded within the mounting plate 9, corresponding to the waist-shaped hole 11 and bolted to the mounting plate. It should be noted that the mounting plate extends into the inner ring of the first bearing, fits against the fixing plate, and is then secured by bolts. The waist-shaped hole allows the clamping mechanism to secure hubs or connectors of varying sizes, even when the clamping mechanism's dimensions vary. The first nut can be secured to the fixing plate by providing a blind hole in the mounting plate, with the first nut secured within the hole. The securing position can be adjusted as needed. Alternatively, a "┣"-shaped slot can be provided in the mounting plate, with the horizontal portion of the slot corresponding to the fixing plate. The first nut is secured at the junction of the horizontal and vertical portions of the slot. The preferred method will depend on the specific circumstances.

[0030] Furthermore, the clamping mechanism includes mounting blocks 13 arranged in parallel above and below, and the mounting plates are fixed to the side walls of the two mounting plates. No matter how the clamping mechanism is adjusted, the mounting plates are fixed to the fixing plates by extending into the first bearing. Therefore, the size of the mounting blocks and the first bearing is selected accordingly. The corresponding plate surfaces of the two mounting blocks 13 are provided with arc grooves 14. The two ends of the rear axle 1 are placed in the arc grooves 14 and are locked and fixed by the second screws 15 on both sides of the arc grooves 14. Specifically, the edges of the wheel hubs or connecting seats at both ends of the rear axle are adapted to the arc grooves so that they are placed in the arc grooves. The wheel hubs or connecting seats are clamped by the two mounting blocks and then locked and fixed by the second screws. The second screw 15 is provided through the two mounting blocks 13 and is fixed to one of the mounting blocks 13 by a second bearing 16. It is driven by a second motor 17 provided on the mounting block 13. The second screw 15 extends out of one end of the other mounting block 13 and is adapted to be fitted with a second nut 18. It should be noted that when both ends of the rear axle are fixed, the second screws are located on either side of the wheel hub or connector. Furthermore, the second motors on both second screws are mounted on the same mounting block. This fixed mounting block drives the other mounting block along the second screw to tighten or loosen the wheel hub or connector. A gap is created between the other mounting block and the second screw. When the second screw rotates, the second nut propels the mounting block. During operation, the second screws must be activated simultaneously, driving the second nut to push the mounting plate toward the wheel hub or connector.

[0031] Furthermore, in order to increase the contact surface between the second nut and the mounting block, a backing plate 19 is provided at one end of the second nut 18 close to the mounting block 13. The backing plate is annular and is fixedly mounted on the circumference of the end surface of the second nut.

[0032] Furthermore, to ensure the stability of the bearing seat during operation, the base 2 is provided with guide grooves parallel to the chute 6. The guide grooves are preferably provided on both sides of the chute. Guide rods parallel to the first screw 7 are provided in the guide grooves. The bottom end of the support 5 is provided with a notch 21. The notch 21 corresponds to the chute 6 and the guide groove, allowing the bottom end of the support 5 to extend into the chute 6 and the guide groove respectively. The guide rods penetrate the support 5 and are provided with a gap. When the first screw drives the support to move along it, it also moves along the guide rods, increasing the stability of the support during operation.

[0033] For further reference, Figure 6As shown, the wheel hubs or connecting seats at both ends of the rear axle are not adapted to the arc groove, that is, the edge of the wheel hub or connecting seat is smaller than the arc groove. At this time, a cavity is left between the arc groove and the wheel hub or connecting seat, that is, the contact area between the wheel hub or connecting seat and the arc groove is reduced. In order to prevent the wheel hub or connecting seat from rotating or moving in the arc groove when the rear axle is running, after the mounting block 13 fixes the two ends of the rear axle 1, that is, after fixing the wheel hubs or connecting seats at both ends of the rear axle, a cavity 22 is left or exists between the wheel hub or connecting seat and the arc groove 14, and on both sides of the arc groove 14. Therefore, the mounting block 13 is respectively provided with a fixing mechanism for pressing the two ends of the rear axle 1, and one end of the fixing mechanism presses the two ends of the rear axle 1 from the cavity 22 on both sides of the arc groove 14, thereby preventing the wheel hub or connecting seat from moving in the arc groove.

[0034] Specifically, the fixing mechanism includes a movable rod 23 and a pressure block 24 hinged at one end of the movable rod 23. The setting direction of the movable rod is the same as the setting direction of the second screw rod and is parallel to each other. Limiting grooves 25 are provided on the inner walls of the cavities 22 on both sides of the arc groove 14. The pressure blocks 24 are placed in the limiting grooves 25. The side of the pressure block located in the arc groove is an arc surface that adapts to the inner wall surface of the arc groove to avoid affecting the clamping and fixation of the wheel hub or connecting seat adapted to the arc groove. The movable rod 23 passes through the mounting block 13 and extends outside the mounting block 13. The two movable rods 23 located on the same mounting block 13 are connected by a connecting rod 26. By pressing the connecting rod, the two movable rods are pressed down at the same time, so that the two pressure blocks simultaneously extend into the cavity and press against the outer edge of the wheel hub or connecting seat. After tightening, the connecting rod 26 and the mounting block 13 are fixed by bolts.

[0035] Furthermore, the specific configuration of the movable rod and the mounting block is as follows: a movable hole 27 is vertically provided in the mounting block 13, communicating with the limiting slot 25. The movable rod 23 passes through the movable hole 27. The dimensions of the movable hole 27 at both ends are smaller than its central dimension, which can be understood as the movable hole being in the shape of a cross. A spring 28 is sleeved on the movable rod 23 in the middle of the movable hole 27. A baffle 29 is provided above the movable rod 23 near the middle of the movable hole 27, with one end of the spring 28 abutting or fixed to the baffle 29. When the movable rod is pressed, the spring is compressed; when it is necessary to loosen the fixation to the wheel hub or connector, the spring acts to cause the pressing block to extend into the limiting slot and reset.

[0036] Furthermore, to enhance stability during test runs after the rear axle is secured, support columns 30 for supporting the rear axle drive shaft are provided on the base 2, below the drive shaft at each end of the rear axle gearbox. Fasteners 31 are provided on the support columns 30 for securing the drive shaft. Both the support columns and the fasteners are conventional and will not be described in detail.

[0037] When using the present invention, it is only necessary to fix the two ends of the rear axle by means of the mounting block and the second screw, and then fix them with the help of the pressing block according to actual needs, and then fix them on the fixing plate through the mounting plate. Compared with directly fixing the two ends of the rear axle to the first bearing, the clamping mechanism of the present invention can adapt to the fixation of rear axles of different sizes. Then, according to the length of the entire rear axle, adjust the distance between the two bearing seats, and fix the stabilizing plate to the base with bolts. Then, with the auxiliary fixation of the support column and the fastener, the stability of the rear axle during the trial operation is increased. Compared with the prior art, which can only fix one size of wheel hub, the automobile rear axle trial operation detection device disclosed in the present invention has a wide range of applications, can fix wheel hubs or connecting shafts of different sizes and rear axles of different lengths, is simple and convenient to operate, and is also easy to disassemble.

[0038] After the rear axle is fixed, the corresponding sensors can be installed as needed, such as testing the speed of the drive shaft, testing the vibration under speed change conditions, etc. The sensor can be installed using the existing method.

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A test run detection device for a rear axle of an electric vehicle, comprising a clamping mechanism for clamping and fixing both ends of a rear axle (1), characterized in that: Each of the clamping mechanisms is detachably connected to a bearing seat, the bearing seat is arranged on a base (2), a driving mechanism for driving the two bearing seats to move simultaneously is arranged on the base (2), and a driving motor for driving the rear axle (1) to operate is arranged on the base (2); The clamping mechanism includes upper and lower mounting blocks (13) arranged in parallel, and arc grooves (14) are correspondingly arranged on the corresponding plate surfaces of the two mounting blocks (13). The two ends of the rear axle (1) are placed in the arc grooves (14) and are locked and fixed by second screws (15) on both sides of the arc grooves (14); the second screw (15) is arranged through the two mounting blocks (13) and is fixed to one of the mounting blocks (13) through a second bearing (16), and is driven by a second motor (17) arranged on the mounting block (13); the second screw (15) extends out of one end of the other mounting block (13) and is adapted to be fitted with a second nut (18); When the mounting block (13) fixes the two ends of the rear axle (1), cavities (22) are left on both sides of the arc-shaped groove (14), and the mounting block (13) is respectively provided with a fixing mechanism for pressing the two ends of the rear axle (1), and one end of the fixing mechanism extends into the cavities (22) on both sides of the arc-shaped groove (14) to press the two ends of the rear axle (1); The fixing mechanism includes a movable rod (23) and a pressure block (24) hinged at one end of the movable rod (23); limiting grooves (25) are provided on the inner walls of the cavities (22) on both sides of the arc groove (14); the pressure blocks (24) are placed in the limiting grooves (25); the movable rod (23) passes through the mounting block (13) and extends out of the mounting block (13); the two movable rods (23) located on the same mounting block (13) are connected by a connecting rod (26); by pressing the connecting rod (26), the two movable rods (23) are pressed down at the same time, so that the two pressure blocks (24) are simultaneously extended into the cavity (22) and pressed against the outer edge of the wheel hub or the connecting seat; after being pressed tightly, the connecting rod (26) and the mounting block (13) are fixed by bolts.

2. The electric vehicle rear axle test run detection device according to claim 1, characterized in that: Each of the bearing seats includes a first bearing (3) and a fixed seat (4) fixed to the bottom of the outer ring of the first bearing (3), a pillar (5) is provided at the bottom of the fixed seat (4), a slide groove (6) is provided on the base (2) along the movement direction of the bearing seat, one end of the two pillars (5) extends into the slide groove (6), and the driving mechanism includes a first screw rod (7) that is rotatably connected in the slide groove (6) and passes through the two pillars (5), the pillars (5) and the first screw rod (7) are threadedly connected, the pillars (5) are located at both ends of the first screw rod (7), the threads on the first screw rod (7) that drive the two pillars (5) to move have opposite rotation directions, and the first screw rod (7) is driven by a first motor (8).

3. The electric vehicle rear axle trial operation detection device according to claim 2, characterized in that: A mounting plate (9) is provided on the clamping mechanism, a fixing plate (10) is provided in the inner ring of the first bearing (3), a waist-shaped hole (11) is vertically provided on the fixing plate (10) at a position corresponding to the mounting plate (9), and a built-in first nut (12) is provided in the mounting plate (9), the first nut (12) corresponds to the waist-shaped hole (11) and is connected by bolts.

4. The electric vehicle rear axle trial operation detection device according to claim 2, characterized in that: A backing plate (19) is provided on one end of the second nut (18) close to the mounting block (13), and a stabilizing plate (20) in contact with the top surface of the base (2) is provided on the side wall of the support (5).

5. The electric vehicle rear axle trial operation detection device according to claim 2, characterized in that: The base (2) is provided with a guide groove parallel to the slide groove (6), and a guide rod parallel to the first screw (7) is provided in the guide groove. The bottom end of the pillar (5) is provided with a notch (21), and the notch (21) corresponds to the slide groove (6) and the guide groove, so that the bottom end of the pillar (5) extends into the slide groove (6) and the guide groove respectively, and the guide rod passes through the pillar (5) and is provided with a gap.

6. The electric vehicle rear axle trial operation detection device according to claim 1, characterized in that: A movable hole (27) communicating with the limiting groove (25) is vertically provided in the mounting block (13), and the movable rod (23) passes through the movable hole (27). The dimensions of both ends of the movable hole (27) are smaller than the dimension of the middle thereof. A spring (28) is sleeved on the movable rod (23) located in the middle of the movable hole (27). A baffle (29) is provided above the movable rod (23) near the middle of the movable hole (27), and one end of the spring (28) abuts against the baffle (29).

7. The electric vehicle rear axle trial operation detection device according to any one of claims 1 to 6, characterized in that: A support column (30) for supporting the rear axle drive shaft is provided on the base (2) below the drive shaft at both ends of the rear axle gearbox, and a fastener (31) is provided on the support column (30) for fixing the drive shaft.

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