Automobile chassis test fixing device

Abstract

The invention relates to the technical field of vehicle detection, and discloses an automobile chassis test fixing device which comprises four lifting mechanisms, the lifting mechanisms are arranged at four corners in a square shape, lifting blocks moving up and down are arranged in the lifting mechanisms, horizontal arms are connected to the front ends of the lifting blocks, supporting arms are hinged to the two ends of the horizontal arms, and the supporting arms are connected with the lifting mechanisms through bolts. A supporting block for clamping and supporting automobile tires is arranged at the front end of the supporting arm, a limiting mechanism for fixing the supporting arm is arranged on the horizontal arm, the device supports a lifted object not to make contact with an automobile chassis while completing lifting of an automobile, the chassis can be disassembled and assembled, and the device is simple in structure, convenient to use and high in practicability. Compared with a traditional lifting platform which is excavated and preset, the test personnel are prevented from missing steps and falling into the hole, the operation area of the chassis is large, and the problem that operation is affected due to the small space does not exist.

Description

Technical Field

[0001] The invention relates to a chassis fixing device, in particular to an automobile chassis testing fixing device. Background Art

[0002] Before testing the chassis of a car, it is necessary to lift the car with a lifting device and then fix the chassis to the bottom of the car. Existing car lifting devices are generally divided into two types: one is to lift the chassis and the other is to lift the tire.

[0003] The first lifting method is that after the car is driven to the designated position, the horizontal load-bearing arm is rotated and moved to the bottom of the car to abut against the chassis. The electric lift drives the load-bearing arm to lift the chassis to achieve lifting. This method is not suitable for disassembly and assembly of the chassis because the force surface is on the contact surface between the chassis and the load-bearing arm.

[0004] The second lifting method requires digging two reserved grooves on the left and right sides of the site, and arranging the lifting platform, folding arm and power system in the reserved grooves. When the car drives onto the lifting platform, the lifting platform drives the car to rise by lifting the tires. This lifting device has the following disadvantages: 1. Due to the presence of a reserved groove of a certain depth, testers may step on the reserved groove when installing the chassis, causing a safety accident; 2. When the site is no longer used for testing in the future, the reserved groove may need to be backfilled and repaired, which consumes manpower and financial resources; 3. Since the top surface of the lifting platform is close to the bottom of the car, when assembling between the front and rear tires, the operation will be affected due to the small space.

[0005] Therefore, a vehicle chassis test fixture that can solve the above-mentioned technical problems is needed. Summary of the Invention

[0006] In view of this, the technical problem to be solved by the present invention is to provide a vehicle chassis test fixture that can be used for chassis disassembly and assembly without affecting the operation.

[0007] The technical solution of the present invention is achieved as follows:

[0008] The present invention provides a vehicle chassis test fixture, comprising four lifting mechanisms, which are arranged in an "opening" shape at four corners. A lifting block that moves up and down is provided inside the lifting mechanism, the front end of the lifting block is connected to a horizontal arm, both ends of the horizontal arm are hinged with support arms, the front end of the support arm is provided with a support block for clamping and supporting the vehicle tire, and the horizontal arm is provided with a limiting mechanism for fixing the support arm.

[0009] Preferably, the limiting mechanism includes a positioning pin, hinge ports are provided at both ends of the horizontal arm, one end of the support arm is horizontally hinged in the hinge port, and positioning holes for the positioning pin to pass through are provided at the upper and lower ends of the hinge port. When the support arm is rotated to be perpendicular to the horizontal arm, the positioning pin abuts against the outer wall surface of the support arm.

[0010] Preferably, the lifting mechanism includes a guide bracket, a lifting motor and a lifting screw, the two ends of the lifting screw are rotatably connected to the two ends of the guide bracket, the lifting motor is installed on the top of the guide bracket, the output shaft of the lifting motor is coaxially connected to the top of the lifting screw, the lifting screw is connected to the center thread of the lifting block, and the lifting block is slidingly connected to the guide bracket.

[0011] Preferably, the side of the support block facing the automobile tire is an inclined surface.

[0012] Preferably, a plurality of rollers are evenly arranged on the inclined surface of the support block, and the rollers abut against the tire tread.

[0013] Preferably, a transverse distance adjusting mechanism is further provided between the lifting block and the horizontal arm, the two groups of lifting mechanisms on the left are connected to each other via the transverse distance adjusting mechanism on the left, and the two groups of lifting mechanisms on the right are connected to each other via the transverse distance adjusting mechanism on the right.

[0014] Preferably, the lateral distance adjustment mechanism includes a sliding frame, the back side of the sliding frame is fixedly connected to the lifting block on the same side, and the horizontal arm on the same side is slidably connected to the front side of the sliding frame.

[0015] Preferably, a threaded hole is provided at the center of the horizontal arm, the threaded hole is communicated with the sliding frame, and a fastening bolt is threadedly connected to the threaded hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a vehicle chassis test fixture, which does not require excavation of reserved holes and utilizes a lifting mechanism fixed on the ground to drive the vehicle to rise; when the test vehicle travels between four groups of lifting mechanisms, the support arms of each group of lifting mechanisms rotate toward the tire side until the support blocks contact the lower tread of the tire, thereby forming a clamping state for both sides of the lower tread of the tire, and by synchronously starting the lifting mechanisms to rise, the lifting blocks, horizontal arms and support blocks are driven to rise synchronously, and the test vehicle is raised by utilizing the clamping and lifting effect of the support blocks on the tires. After the lifting, there is no obstruction under the vehicle, and only the position of the tires is blocked by the support blocks. The working area is large, which is convenient for testers to quickly disassemble and assemble the chassis, and also convenient for testers to debug and test various positions of the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic side structural diagram of the first embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the partial structure of the first embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the positional relationship between the support block and the tire according to the first embodiment of the present invention;

[0022] Figure 4 This is a structural diagram of a lifting mechanism according to a first embodiment of the present invention;

[0023] Figure 5 This is a schematic structural diagram of a first embodiment of the present invention when the horizontal arm and the support arm are in a straight line;

[0024] Figure 6 This is a schematic structural diagram of a first embodiment of the present invention when the horizontal arm and the support arm are in a vertical state;

[0025] Figure 7 This is a structural diagram of embodiment 2 of the present invention.

[0026] In the figure, 1. lifting mechanism; 2. lifting block; 3. horizontal arm; 4. support arm; 5. support block; 6. positioning pin; 7. hinge interface; 8. positioning hole; 9. guide bracket; 10. lifting motor; 11. lifting screw; 12. roller; 13. sliding frame; 14. fastening bolt. DETAILED DESCRIPTION

[0027] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0028] Example 1

[0029] See also Figures 1 to 6The present invention provides a vehicle chassis test fixture, comprising four lifting mechanisms 1, which are arranged in an "opening" shape at the four corners. The power control signal lines of the four lifting mechanisms 1 are connected through a PLC control module to achieve synchronous start and stop of the four lifting mechanisms 1. A lifting block 2 that moves up and down is provided in the lifting mechanism 1, and a horizontal arm 3 is connected to the front end of the lifting block 2. Both ends of the horizontal arm 3 are hinged with a support arm 4, and the support arm 4 can rotate horizontally around the hinge point. A support block 5 for clamping and supporting the vehicle tire is provided at the front end of the support arm 4, and a limiting mechanism for fixing the support arm 4 is provided on the horizontal arm 3.

[0030] In the initial state, the support arm 4 and the horizontal arm 3 are on the same straight line. When disassembling and assembling the chassis, first drive the test vehicle between the four groups of lifting mechanisms 1, and align the four tires of the vehicle with the four groups of lifting mechanisms 1 respectively. At this time, the support arms 4 are all below the center of the tire. Rotate the support arms 4 of each group of lifting mechanisms 1 toward the tire side until the support blocks 5 contact the lower half of the tire tread, thereby forming a clamping state on both sides of the lower half of the tire tread. By synchronously starting the lifting mechanism 1 to rise, the lifting block 2, the horizontal arm 3, the support arm 4 and the support block 5 are driven to rise synchronously. The test vehicle is raised by the clamping and lifting effect of the support block 5 on the tire. After lifting, there is no obstruction under the car, and only the position of the tire is blocked by the support block 5. The working area is large, which is convenient for the test personnel to quickly disassemble and assemble the chassis, and also convenient for the test personnel to debug and test various positions of the chassis.

[0031] Compared with the first lifting method in the background technology, this device can lift the vehicle without the supported objects coming into contact with the chassis, so that the chassis can be disassembled and assembled. Compared with the second lifting method, the preset excavation step is eliminated, which prevents the tester from falling into the hole. In addition, the chassis operating area is large, so there is no problem of affecting the operation due to the small space.

[0032] The limiting mechanism includes a locating pin 6, which is made of high-strength steel. Hinge ports 7 are provided at both ends of the horizontal arm 3. One end of the support arm 4 is horizontally hinged in the hinge port 7. Positioning holes 8 for the locating pin 6 to pass through are provided at the upper and lower ends of the hinge port 7. When the support arm 4 and the horizontal arm 3 are horizontally in a straight line, the locating pin is not in the locating hole 8. When the support arm 4 is rotated to be perpendicular to the horizontal arm 3, the locating pin 6 is passed through the locating hole 8 to abut against the outer wall of the support arm 4. In the process of the support block 5 lifting the wheel, the wheel will exert an outward force on the support block 5, thereby preventing the support arm 4 from rotating outward through the locating pin.

[0033] The lifting mechanism 1 includes a guide bracket 9, a lifting motor 10 and a lifting screw 11. The two ends of the lifting screw 11 are rotatably connected to the two ends of the guide bracket 9. The lifting motor 10 is installed on the top of the guide bracket 9. The output shaft of the lifting motor 10 is coaxially connected to the top of the lifting screw 11. The lifting screw 11 is connected to the center thread of the lifting block 2, and the lifting block 2 is slidably connected to the guide bracket 9.

[0034] The side of the support block 5 facing the automobile tire is an inclined surface.

[0035] A plurality of rollers 12 are evenly arranged on the inclined surface of the support block 5 , and the rollers 12 abut against the tire tread.

[0036] Lifting motor 10 drives lifting screw 11, which in turn causes lifting block 2 to rise along guide bracket 9, thereby driving horizontal arm 3 and support block 5 to lift the vehicle. The support block 5, with its inclined surface, forms an isosceles trapezoidal support groove on either side of the tire, effectively supporting and clamping tires of varying diameters, extending its applicability. Rollers 12 on the inclined surface rotate with the wheel, causing the tire to slip. This, to a certain extent, prevents the tire from disengaging from support block 5 during an abnormal vehicle start, effectively protecting both the tester and the test vehicle.

[0037] Example 2

[0038] See also Figure 7 The difference between this embodiment and the first embodiment is that a lateral distance adjustment mechanism is further provided between the lifting block 2 and the horizontal arm 3. The two groups of lifting mechanisms 1 on the left are connected to each other through the lateral distance adjustment mechanism on the left, and the two groups of lifting mechanisms 1 on the right are connected to each other through the lateral distance adjustment mechanism on the right.

[0039] The lateral distance adjustment mechanism includes a sliding frame 13 , the back surface of the sliding frame 13 is fixedly connected to the lifting block 2 on the same side, and the horizontal arm 3 on the same side is slidably connected to the front surface of the sliding frame 13 .

[0040] A threaded hole is formed at the center of the horizontal arm 3 , the threaded hole is communicated with the sliding frame 13 , and a fastening bolt 14 is threadedly connected to the threaded hole.

[0041] Because the spacing between the front and rear tires of different vehicles varies, a sliding frame 13 has been added to adapt this test installation to a wider range of vehicles. This sliding frame can drive the horizontal arm 3 to move horizontally and adjust the distance. After a vehicle enters the designated area, the horizontal arm 3 is first slid to a position corresponding to each tire. The tightening bolts 14 are then tightened to position the horizontal arm 3. The above operation is then repeated, and the support arm 4 is rotated to clamp, support, and lift the tire using the support block 5. On the two sets of horizontal arms 3 located on the same sliding frame 13, the two support arms 4 facing inward can be rotated to be parallel to the sliding frame 13, while the other can be rotated to an acute angle with the sliding frame 13. This allows the two sets of horizontal arms 3 to slide left and right and adjust their positions without affecting the entry and exit of vehicles.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle chassis test fixture, characterized in that: The utility model comprises four groups of lifting mechanisms, which are arranged in a "mouth" shape at four corners, wherein a lifting block which moves up and down is arranged in the lifting mechanism, a horizontal arm is connected to the front end of the lifting block, support arms are hinged at both ends of the horizontal arm, a support block for clamping and supporting the automobile tire is arranged at the front end of the support arm, and a limiting mechanism for fixing the support arm is arranged on the horizontal arm.

2. The automobile chassis test fixture according to claim 1, characterized in that: The limiting mechanism includes a positioning pin, hinge ports are provided at both ends of the horizontal arm, one end of the support arm is horizontally hinged in the hinge ports, and positioning holes for the positioning pin to pass through are provided at the upper and lower ends of the hinge ports. When the support arm is rotated to be perpendicular to the horizontal arm, the positioning pin abuts against the outer wall surface of the support arm.

3. The automobile chassis test fixture according to claim 2, characterized in that: The lifting mechanism includes a guide bracket, a lifting motor and a lifting screw. The two ends of the lifting screw are rotatably connected to the two ends of the guide bracket. The lifting motor is installed on the top of the guide bracket. The output shaft of the lifting motor is coaxially connected to the top of the lifting screw. The lifting screw is connected to the center thread of the lifting block, and the lifting block is slidably connected to the guide bracket.

4. The automobile chassis test fixture according to claim 1, characterized in that: The side of the support block facing the automobile tire is an inclined surface.

5. The automobile chassis test fixture according to claim 4, characterized in that: A plurality of rollers are evenly arranged on the inclined surface of the support block, and the rollers abut against the tire tread.

6. The automobile chassis test fixture according to claim 3, characterized in that: A transverse distance adjusting mechanism is also provided between the lifting block and the horizontal arm. The two groups of lifting mechanisms on the left are connected to each other through the transverse distance adjusting mechanism on the left, and the two groups of lifting mechanisms on the right are connected to each other through the transverse distance adjusting mechanism on the right.

7. The automobile chassis test fixture according to claim 6, characterized in that: The lateral distance adjustment mechanism comprises a sliding frame, the back side of the sliding frame is fixedly connected to the lifting block on the same side, and the horizontal arm on the same side is slidably connected to the front side of the sliding frame.

8. The automobile chassis test fixture according to claim 7, characterized in that: A threaded hole is provided at the center of the horizontal arm, the threaded hole is communicated with the sliding frame, and a fastening bolt is threadedly connected in the threaded hole.

Images