Electric automobile rear axle pilot run detection device

Abstract

The invention relates to the technical field of automobile detection equipment, in particular to an electric automobile rear axle pilot run detection device. According to the specific technical scheme, the test run detection device for the rear axle of the electric vehicle comprises clamping mechanisms for clamping and fixing the two ends of the rear axle respectively, each clamping mechanism is detachably connected to a bearing seat, the bearing seats are arranged on a base, the base is provided with a driving mechanism for driving the two bearing seats to move at the same time, and the driving mechanism is connected with the clamping mechanisms. And a driving motor for driving the rear axle to operate is arranged on the base. According to the rear axle fixing device, the problem that rear axles of different sizes cannot be fixed in the prior art is solved.

Description

Technical Field

[0001] The 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 an important part of the car, and its performance directly affects the driving safety of the vehicle. Through testing, potential safety hazards can be discovered and eliminated in a timely manner to ensure that the vehicle will not lose control or malfunction during driving.

[0003] In the prior art, the two ends of the rear axle are usually fixed by bearings, and then the rear axle is driven to run in order to detect 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 can only be applied to the fixing of rear axles of the same size, and 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, because it is to fix the drive shaft, 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 leads to a large detection error. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a test operation 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: The present invention discloses a test operation detection device for the rear axle of an electric vehicle, comprising a clamping mechanism for clamping and fixing the two ends of the rear axle respectively, each of the clamping mechanisms being detachably connected to a bearing seat, the bearing seat being arranged on a base, a driving mechanism for driving the two bearing seats to move simultaneously being arranged on the base, and a driving motor for driving the rear axle to operate being arranged on the base.

[0006] 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 rotatably connected in the slide groove and passing through the two pillars, the pillars are threadedly connected to the first screw rod, 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.

[0007] Preferably, a mounting plate is provided on the clamping mechanism, a fixing plate is provided in the inner ring of the first bearing, a waist-shaped hole is vertically provided at a position on the fixing plate corresponding to the mounting plate, a built-in first nut is provided in the mounting plate, the first nut corresponds to the waist-shaped hole and is connected by bolts.

[0008] Preferably, the clamping mechanism includes mounting blocks arranged in parallel above and below, and arc grooves are correspondingly arranged on the corresponding plate surfaces of the two mounting blocks, and the two ends of the rear axle are placed in the arc grooves and are locked and fixed by second screws on both sides of the arc grooves; the second screw passes through the two mounting blocks and is fixed to one of the mounting blocks through a second bearing, and is driven by a second motor arranged on the mounting block, and the second screw extends out of one end of the other mounting block and is adapted to be fitted with a second nut.

[0009] Preferably, a pad is provided at one end of the second nut close to the mounting block, and a stabilizing plate in contact with the top surface of the base is provided on the side wall of the pillar.

[0010] Preferably, a guide groove parallel to the slide groove is provided on the base, a guide rod parallel to the first screw is provided in the guide groove, a notch is provided at the bottom end of the pillar, the notch corresponds to the slide groove and the guide groove, so that the bottom end of the pillar extends into the slide groove and the guide groove respectively, and the guide rod passes through the pillar and is provided with a gap.

[0011] Preferably, when the mounting block fixes the two ends of the rear axle and cavities are left on both sides of the arc-shaped groove, the mounting block is respectively provided with fixing mechanisms for pressing the two ends of the rear axle, and one end of the fixing mechanism extends into the cavities on both sides of the arc-shaped groove to press the two ends of the rear axle.

[0012] Preferably, the fixing mechanism includes a movable rod and a pressure block hinged at one end of the movable rod, and limiting grooves are provided on the inner walls of the cavities on both sides of the arc groove, and the pressure blocks are placed in the limiting grooves. The movable rod passes through the mounting block and extends out of the mounting block; the two movable rods located on the same mounting block are connected by a connecting rod, and the connecting rod and the mounting block are fixed by bolts.

[0013] Preferably, a movable hole communicating with the limiting groove is vertically arranged in the mounting block, the movable rod passes through the movable hole, the dimensions of both ends of the movable hole are smaller than the middle dimension thereof, a spring is sleeved on the movable rod located in the middle of the movable hole, a baffle is arranged on the movable rod above the middle of the movable hole, and one end of the spring abuts against the baffle.

[0014] Preferably, support columns for supporting the rear axle drive shaft are arranged on the base below the drive shaft at both ends of the rear axle gear box, and fasteners are arranged on the support columns for fixing the drive shaft.

[0015] The present invention has the following beneficial effects: The present invention fixes the two ends of the rear axle by means of a mounting block and a second screw rod, and then fixes the two ends of the rear axle with a pressing block according to actual needs, and then fixes the two ends of the rear axle to a fixing plate through a 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. At the same time, the distance between the two bearing seats can be adjusted according to the length of the entire rear axle, and the stabilizing plate and the base can be fixed by bolts to increase the stability of the rear axle during the trial operation. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a side view of the bearing seat; Figure 3 for Figure 1 AA view of the middle clamping mechanism; Figure 4 for Figure 3 Schematic diagram after removing the wheel hub or connecting seat; Figure 5 It is a view of the connection side between the clamping mechanism and the bearing seat; Figure 6 A schematic diagram of another embodiment of the clamping mechanism (the fixing mechanism on the upper mounting block is pressed against the side of the rear axle wheel hub or the connecting seat); In the figure: rear axle 1, base 2, first bearing 3, fixed seat 4, pillar 5, slide groove 6, first screw 7, first motor 8, mounting plate 9, fixing plate 10, waist-shaped hole 11, first nut 12, mounting block 13, arc groove 14, second screw 15, second bearing 16, second motor 17, second nut 18, pad 19, stabilizing plate 20, notch 21, cavity 22, movable rod 23, pressure block 24, limiting groove 25, connecting rod 26, movable hole 27, spring 28, baffle 29, support column 30, fastener 31. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0018] Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0019] refer to Figure 1-Figure 5 The present invention discloses a test run detection device for the rear axle of an electric vehicle, comprising a clamping mechanism for clamping and fixing the two ends of the rear axle 1, each of the clamping mechanisms being detachably connected to a bearing seat, the bearing seat being arranged on a base 2, the base 2 being provided with a driving mechanism for driving the two bearing seats to move simultaneously, and the base 2 being provided with a driving motor (not shown in the figure) for driving the rear axle 1 to run. It should be noted that: a wheel hub or a wheel hub connecting seat is fixed at both ends of the rear axle, and the present invention fixes the wheel hub or the wheel hub connecting seat when it exists, and the outer contours of the connecting seat and the wheel hub are both circular. The driving motor is used to drive the rear axle to run, and the specific connection method is the prior art and will not be repeated. The rear axle is arranged between the two bearing seats, and the rear axles of different lengths can be fixed by adjusting the distance between the two bearing seats, thereby expanding its scope of use. At the same time, the clamping mechanism is adjustable and can fix wheel hubs or connecting seats of different sizes, so that the detection device disclosed in the present invention can perform test run detection on rear axles of different sizes.

[0020] Further, each of the bearing seats includes a first bearing 3 and a fixed seat 4 fixed at the bottom of the outer ring of the first bearing 3. The fixed seat can be annular and sleeved on the outer ring of the first bearing, or can be arc-shaped and directly fixed at the bottom of the first bearing. The specific setting can be as required. A pillar 5 is arranged at the bottom of the fixed seat 4, and a slide groove 6 is arranged on the base 2 along the movement direction of the bearing seat, that is, the setting direction of the slide groove is consistent with the fixing direction of the rear axle. 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 are threadedly connected to the first screw rod 7. The pillars 5 are arranged near the two ends of the first screw rod 7. The threads on the first screw rod 7 that drive the two pillars 5 to move are opposite in rotation direction, and the first screw rod 7 is driven by the first motor 8. It should be noted that the threads on the first screw rod that connect the two pillars have opposite rotation directions, so that when the first screw rod rotates, the two pillars move toward or away from each other at the same time. As one of the embodiments, 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, so as to realize 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. Further, 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 the actual situation. Furthermore, after the adjustment of the bearing seat is completed, the stabilizing plate can be fixed to the base by bolts.

[0021] Further, in order to achieve the fixation of the clamping mechanism and 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, 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. It should be noted that: the mounting plate extends into the inner ring of the first bearing, fits with the fixing plate, and is then fixed by bolts, and the waist-shaped hole is provided to adapt to the clamping mechanism to fix the wheel hub or connecting seat of different sizes, and the size of the clamping mechanism changes, and it can also be fixed with the fixing plate. The installation of the first nut can be: a blind hole is provided on the mounting plate, the first nut is fixed in the blind hole, and the fixed position can be set as required. Alternatively, a "┣"-shaped groove is provided on the mounting plate, the horizontal part of the groove corresponds to the fixing plate, and the first nut is fixed at the connection between the horizontal part and the vertical part of the groove. The specific method to be selected can be set according to the actual situation.

[0022] Furthermore, the clamping mechanism includes a mounting block 13 arranged in parallel up and down, and the mounting plate is fixed on the side walls of the two mounting plates accordingly. No matter how the clamping mechanism is adjusted, the mounting plate is extended into the first bearing and fixed to the fixing plate. Therefore, the size of the mounting block and the first bearing is selected accordingly. The corresponding plate surfaces of the two mounting blocks 13 are provided with arc grooves 14, and 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 the two ends of the rear axle are adapted to the arc grooves so that they are placed in the arc grooves, and the wheel hubs or connecting seats are clamped by the two mounting blocks, and then locked and fixed by the second screw. Among them, the second screw 15 is arranged through the two mounting blocks 13, and is fixed to one of the mounting blocks 13 through the second bearing 16, and is driven by the 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 with a second nut 18. It should be noted that: when the two ends of the rear axle are fixed, the second screw rod is located on both sides of the wheel hub or the connecting seat. At the same time, the second motors on the two second screw rods are both set on the same mounting block, which is a fixed mounting block to drive the other mounting block to move along the second screw rod to achieve the clamping or loosening of the wheel hub or the connecting seat. A gap is set between the other mounting block and the second screw rod. When the second screw rod rotates, the second nut pushes the mounting block to move. When in use, the second screw rod needs to be started at the same time, and the second nut needs to be driven to push the mounting plate toward the wheel hub or the connecting seat.

[0023] 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 sleeved and fixed on the circumference of the end surface of the second nut.

[0024] Furthermore, in order to ensure the stability of the bearing seat during operation, the base 2 is provided with a guide groove parallel to the slide groove 6, and the guide groove is preferably provided on both sides of the slide groove. A guide rod parallel to the first screw 7 is provided in the guide groove, and a notch 21 is provided at the bottom end of the pillar 5. 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. When the first screw drives the pillar to move along it, it also moves along the guide rod, which increases the stability of the pillar during operation.

[0025] For further reference, Figure 6As shown, the wheel hub or connecting seat at both ends of the rear axle is 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 hub or connecting seat 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 extending into both sides of the arc groove 14, thereby preventing the wheel hub or connecting seat from moving in the arc groove.

[0026] 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 they are parallel to each other. Limiting grooves 25 are set 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, which is adapted to the inner wall surface of the arc groove to avoid affecting the clamping and fixing of the wheel hub or the connecting seat adapted to the arc groove. 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, the two movable rods are pressed down at the same time, so that the two pressure blocks are simultaneously extended into the cavity to press against the outer edge of the wheel hub or the connecting seat. After pressing, the connecting rod 26 and the mounting block 13 are fixed by bolts.

[0027] Furthermore, the specific arrangement of the movable rod and the mounting block is as follows: a movable hole 27 communicating with the limiting groove 25 is vertically arranged in the mounting block 13, the movable rod 23 passes through the movable hole 27, the dimensions of the two ends of the movable hole 27 are smaller than the dimensions of the middle thereof, and it can be understood that the movable hole is in a "cross" shape, a spring 28 is sleeved on the movable rod 23 located in the middle of the movable hole 27, a baffle 29 is arranged on the movable rod 23 above the middle of the movable hole 27, and one end of the spring 28 abuts or is fixed to the baffle 29. When the movable rod is pressed, the spring is compressed; when it is necessary to loosen the fixation of the wheel hub or the connecting seat, under the action of the spring, the pressing block extends into the limiting groove to reset.

[0028] Furthermore, in order to increase the stability of the rear axle during the trial operation after it is fixed, a support column 30 for supporting the rear axle transmission shaft is provided on the base 2 and below the transmission shaft at both ends of the rear axle gearbox, and a fastener 31 is provided on the support column 30 for fixing the transmission shaft. The support column and the fastener are both prior art and will not be described in detail.

[0029] 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 a 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 support columns and fasteners, 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 of different sizes or connecting shafts and rear axles of different lengths, is simple and convenient to operate, and is also easy to disassemble.

[0030] After the rear axle is fixed, the corresponding sensor is installed as needed, such as testing the rotation speed of the transmission shaft, vibration test under speed change conditions, etc. The sensor can be installed in the existing way.

[0031] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined 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 two bearing seats to move simultaneously is arranged on the base (2), and a driving motor for driving the rear axle (1) to move is arranged on the base (2).

2. The electric vehicle rear axle test run detection device according to claim 1, characterized in that: Each of the bearing seats comprises a first bearing (3) and a fixed seat (4) fixed at the bottom of the outer ring of the first bearing (3); a pillar (5) is arranged at the bottom of the fixed seat (4); a slide groove (6) is arranged 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); the driving mechanism comprises a first screw rod (7) rotatably connected in the slide groove (6) and passing through the two pillars (5); the pillars (5) are threadedly connected to the first screw rod (7); the pillars (5) are located at both ends of the first screw rod (7); the threads on the first screw rod (7) driving 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 test run detection device according to claim 2, characterized in that: The clamping mechanism is provided with a mounting plate (9), the inner ring of the first bearing (3) is provided with a fixing plate (10), 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 test run detection device according to claim 3, characterized in that: The clamping mechanism comprises mounting blocks (13) arranged in parallel with each other in an upper and lower direction. The corresponding plate surfaces of the two mounting blocks (13) are provided with arc grooves (14) in a corresponding manner. 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) passes through the two mounting blocks (13) and is fixed to one of the mounting blocks (13) by a second bearing (16). The second screw (15) 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 fitted with a second nut (18).

5. The electric vehicle rear axle test run detection device according to claim 4, characterized in that: A backing plate (19) is provided at 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 column (5).

6. The electric vehicle rear axle test run 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 rod (7) is provided in the guide groove. A notch (21) is provided at the bottom end of the support (5), and the notch (21) corresponds to the slide groove (6) and the guide groove, so that the bottom end of the support (5) extends into the slide groove (6) and the guide groove respectively, and the guide rod passes through the support (5) and is provided with a gap.

7. The electric vehicle rear axle test run detection device according to claim 4, characterized in that: When the mounting block (13) fixes the two ends of the rear axle (1) and cavities (22) are left on both sides of the arc-shaped groove (14), the mounting block (13) is provided with fixing mechanisms for pressing the two ends of the rear axle (1) tightly, 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) tightly.

8. The electric vehicle rear axle test run detection device according to claim 7, characterized in that: The fixing mechanism comprises 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-shaped 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); the connecting rod (26) and the mounting block (13) are fixed by bolts.

9. The electric vehicle rear axle test run detection device according to claim 8, characterized in that: A movable hole (27) communicating with the limiting groove (25) is vertically arranged in the mounting block (13); the movable rod (23) passes through the movable hole (27); the dimensions of the two ends of the movable hole (27) are smaller than the dimensions 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 arranged above the movable rod (23) near the middle of the movable hole (27); one end of the spring (28) abuts against the baffle (29).

10. An electric vehicle rear axle test run detection device according to any one of claims 1 to 9, characterized in that: A support column (30) for supporting the rear axle drive shaft is provided on the base (2) and below the drive shaft at both ends of the rear axle gear box. A fastener (31) is provided on the support column (30) for fixing the drive shaft.

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