A detection device and method for detecting the coil spring of a vehicle suspension

Abstract

The present invention discloses a detection device and method for detecting the helical spring of a vehicle suspension, including a base provided with a central hole. The lower end of the lower screw passes through the central hole of the base and is threadedly connected to the lower test disc. Above the central hole of the base, a lower positioning seat adapted to be connected to the associated part at the lower end of the spring is coaxially installed. On the surface of the base, a plurality of columns are provided along the circumferential direction of the central hole. A threaded ejector rod arranged in the radial direction of the central hole is threadedly connected to the columns, and a pressing block is provided at the front end of the threaded ejector rod. The device further includes an upper positioning seat adapted to be connected to the associated part at the upper end of the spring. The upper end of the upper screw passes through the holes corresponding to the center of the associated part at the upper end of the spring and the upper positioning seat and is threadedly connected to the upper test disc. The detection device of the present invention has good versatility, is convenient to use and has accurate positioning. For different helical springs of vehicle suspensions, only the corresponding upper and lower positioning seats need to be replaced, which is beneficial to the detection of helical springs of multi-variety vehicles and saves the tooling production cycle and cost.

Description

Technical Field

[0001] The present invention relates to a spring detection device, and particularly to a detection device and method for detecting the helical spring of a vehicle suspension. Background Art

[0002] The helical spring used in the vehicle suspension is one of the key performance components of the vehicle suspension. During the design and development process of the whole vehicle and the suspension, it is necessary to detect the performance of the helical spring such as stiffness, resistance, and resistance direction to verify whether the helical spring meets the product design requirements. Usually, a spring test bench is used to detect the helical spring. However, during this process, an auxiliary device is required to keep the installation state of the spring during detection consistent with its use state, and the pressure loading center of this device needs to be concentric with the upper and lower test discs of the spring test bench, and it can make the angle of the helical spring in the circumferential direction associated with the scale on the test disc, so that the resistance direction of the test result has directivity on the helical spring. However, the existing devices for achieving the above purposes are inconvenient to use, inaccurate in positioning, and poor in versatility, and cannot meet the detection of different models of helical springs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing devices for accurately detecting helical springs are inconvenient to use, inaccurate in positioning, and poor in versatility, and cannot meet the detection of different models of helical springs. The purpose is to provide a detection device and method for detecting the helical spring of a vehicle suspension, which has good versatility, is convenient to use and accurate in positioning. For different suspension helical springs, only the corresponding upper and lower positioning seats need to be replaced, which is beneficial to the detection of multi-variety vehicle suspension helical springs and saves the tooling production cycle and cost.

[0004] The present invention is achieved by the following technical solutions:

[0005] A detection device for detecting the helical spring of a vehicle suspension according to the present invention includes a base provided with a central hole. The lower end of the lower screw passes through the central hole of the base and is threadedly connected to the lower test disc of the spring test bench. Above the central hole of the base, a lower positioning seat adapted to be connected to the component associated with the lower end of the spring is coaxially installed. On the surface of the base, a plurality of columns are provided along the circumferential direction of the central hole. A threaded ejector rod arranged in the radial direction of the central hole is threadedly connected to the column. A pressing block is provided at the front end of the threaded ejector rod. When the threaded ejector rod rotates, it can push the pressing block to move horizontally towards the central hole direction. The device also includes an upper positioning seat adapted to be connected to the component associated with the upper end of the spring. The upper end of the upper screw passes through the holes corresponding to the center of the component associated with the upper end of the spring and the upper positioning seat and is threadedly connected to the upper test disc of the spring test bench.

[0006] The detection device of the present invention has good versatility, is convenient to use and has accurate positioning. For different suspension coil springs, only the corresponding upper and lower positioning seats need to be replaced, which is beneficial to the detection of suspension coil springs of various vehicle models and saves the tooling production cycle and cost. When the detection device of the present invention is in use, it is placed on an existing spring test bench. The base is fixed on the lower test disc through a lower screw. The upper and lower ends of the spring to be tested are respectively assembled with the upper related part of the coil spring and the lower related part of the coil spring according to the assembly relationship. The upper related part of the coil spring and the lower related part of the coil spring are existing structures required when the front suspension coil spring is in use, so no detailed description is made here. Then, the upper related part of the coil spring and the lower related part of the coil spring are respectively assembled adaptively with the upper positioning seat and the lower positioning seat. Then, the upper positioning seat is fixed on the upper test disc. Finally, the threaded ejector rod is rotated so that the pressing block can tightly fit and press against the cylindrical surface of the lower related part of the spring. The pressing block is pushed and pressed by the threaded ejector rod in multiple directions to squeeze the lower related part of the spring for fastening, so that it forms an integral body with the lower positioning seat and the base, preventing the spring from tilting and coming out during the test. The scale on the test disc is associated by the alignment of the engraved lines or marks on the surface of the base with the marks on the lower test disc of the spring test bench, so that the resistance direction of the test result has a directivity on the coil spring. This device can meet the needs of detecting the performance of the coil spring such as stiffness, resistance and resistance direction, and is simple and easy to use. With the above structure, the tested spring is detected by the upper and lower test discs of the spring test bench according to relevant requirements. It has strong versatility. For different front suspension coil springs, there are corresponding upper related parts of the coil spring and lower related parts of the coil spring. Therefore, this device only needs to replace the corresponding upper and lower positioning seats to carry out the detection, reducing the tooling cost and production cycle of the detection. Moreover, the test method is to test the spring by using the upper and lower related parts of the coil spring, which can make the test installation state of the spring consistent with the use state and make the test result consistent with the state of the spring when it is used on the suspension.

[0007] A groove parallel to the threaded ejector rod and penetrating both side surfaces of the column is provided at the top of the column. A pressing plate is arranged in the groove. The end of the pressing plate is connected to the pressing block. When the threaded ejector rod rotates to push the pressing block to move, the pressing plate can slide linearly along the groove. By setting the pressing plate on the column, the integrity of the pressing block and the column is realized, ensuring the horizontal linear movement of the pressing block.

[0008] A retaining ring is covered above the surface of the groove. The retaining ring is fixed to the top of the column by a limit screw, which can prevent the pressing plate from coming out of the groove from above.

[0009] The bottom surface of the upper positioning seat is provided with an upper card slot that matches the upper associated part of the spring. The surface of the lower positioning seat is provided with a lower card slot that matches the lower associated part of the spring. The lower card slot is concentric with both the central hole of the base and the lower test disc. The present invention utilizes the commonality that the lower associated part of the spring has a cylindrical surface and the coaxiality of the cylinder and the circular hole, so that the lower associated part of the spring is inserted into the lower card slot of the lower positioning seat, thereby ensuring concentricity with the lower test disc of the spring test bench during testing through clearance or transitional fit.

[0010] On the side wall of the pressing block near the central hole, a V-shaped groove penetrating the upper and lower surfaces of the pressing block is provided, which increases the contact area and friction force between the pressing block and the side wall of the lower associated part of the spring, and improves the fastening property of the pressing block to the lower associated part of the spring.

[0011] There are four columns, which are distributed at 90° azimuths among the four columns, that is, the same torque is applied from four evenly distributed directions to push and press the pressing block to fix the lower associated part of the spring. The stability of the lower associated part of the spring is good, further preventing the spring from tilting and coming out during the test.

[0012] The side wall of the pressing block near the central hole is arc-shaped, which increases the contact area between the side wall of the pressing block and the lower associated part of the spring and improves the fastening property.

[0013] A detection method for detecting the helical spring of a vehicle suspension includes the following steps: 1) Fix the base on the lower test disc through the lower screw, and assemble the upper end and the lower end of the spring to be tested with the upper associated part of the helical spring and the lower associated part of the helical spring according to the assembly relationship respectively; 2) Install the upper associated part of the helical spring on the upper positioning seat, install the lower associated part of the helical spring on the lower positioning seat, and then fix the upper positioning seat on the upper test disc; 3) Rotate a plurality of threaded ejector rods so that the pressing block can tightly fit and press the lower associated part of the spring, and fasten in multiple directions; 4) Use the upper test disc and the lower test disc on the spring test bench to detect the spring to be tested as required.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] 1. The detection device and method for detecting the helical spring of a vehicle suspension of the present invention have good versatility, are easy to use and accurately positioned. For different suspension helical springs, only the corresponding upper and lower positioning seats need to be replaced, which is beneficial to the detection of multi-variety vehicle suspension helical springs, saving the tooling production cycle and cost;

[0016] 2. The detection device and method for a vehicle suspension coil spring according to the present invention achieve the integration of the pressing block and the column through the pressing plate provided on the column, ensuring the horizontal linear movement of the pressing block. A retaining ring is covered above the surface of the groove, and the retaining ring is fixed to the top of the column by a limit screw, which can prevent the pressing plate from disengaging from above the groove.

[0017] 3. The detection device and method for a vehicle suspension coil spring according to the present invention have a V-shaped groove penetrating the upper and lower surfaces of the pressing block or an arc-shaped side wall on the side wall of the pressing block near the central hole, increasing the contact area and friction between the pressing block and the side wall of the component associated with the lower end of the spring, and improving the fastening of the pressing block to the component associated with the lower end of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic structural diagram of the column.

[0021] Reference numerals in the drawings and corresponding component names:

[0022] 1 - base, 2 - column, 3 - threaded ejector rod, 4 - pressing block, 5 - retaining ring, 6 - limit screw, 7 - lower positioning seat, 8 - lower screw, 9 - component associated with the lower end of the spring, 10 - spring to be tested, 11 - component associated with the upper end of the spring, 12 - upper positioning seat, 13 - upper screw, 14 - groove, 15 - pressing plate, 16 - V-shaped groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and do not limit the present invention.

[0024] Embodiment 1

[0025] As Figure 1As shown in the figure, a detection device for a vehicle suspension coil spring according to the present invention includes a base 1 provided with a central hole. The lower end of the lower screw 8 passes through the central hole of the base 1 and is threadedly connected to the lower test disc of the spring test bench. Above the central hole of the base 1, a lower positioning seat 7 adapted to be connected to the lower spring associated part 9 is coaxially installed. On the surface of the base 1, a plurality of columns 2 are provided along the circumferential direction of the central hole. A threaded ejector rod 3 arranged in the radial direction of the central hole is threadedly connected to the column 2. A pressing block 4 is provided at the front end of the threaded ejector rod 3. When the threaded ejector rod 3 rotates, it can push the pressing block 4 to move horizontally towards the central hole. The device also includes an upper positioning seat 12 adapted to be connected to the upper spring associated part 11. The upper end of the upper screw 13 passes through the holes corresponding to the centers of the upper spring associated part 11 and the upper positioning seat 12 and is threadedly connected to the upper test disc of the spring test bench.

[0026] The detection device of the present invention has good versatility, is easy to use and has accurate positioning. For different suspension coil springs, only the corresponding upper and lower positioning seats need to be replaced, which is beneficial to the detection of suspension coil springs of various vehicle models, saving the tooling production cycle and cost. When the detection device of the present invention is used, it is placed on an existing spring test bench. The base is fixed to the lower test disc through the lower screw. The upper and lower ends of the spring 10 to be tested are respectively assembled with the upper spring associated part and the lower spring associated part of the coil spring according to the assembly relationship. The upper spring associated part and the lower spring associated part of the coil spring are existing structures required when the front suspension coil spring is used, so no detailed description is given here. Then, the upper spring associated part and the lower spring associated part of the coil spring are respectively assembled adaptively with the upper positioning seat and the lower positioning seat. Then, the upper positioning seat is fixed to the upper test disc. Finally, rotate the threaded ejector rod so that the pressing block can tightly fit and press against the cylindrical surface of the lower spring associated part. Push and press the pressing block in multiple directions to squeeze the lower spring associated part to tighten it, so that it forms a whole with the lower positioning seat and the base, preventing the spring from tilting and coming out during the test. The scale on the test result is associated with the scale on the test disc by corresponding the scale or mark on the surface of the base with the mark on the lower test disc of the spring test bench, so that the resistance direction of the test result has directivity on the coil spring. This device can meet the needs of detecting the performance of the coil spring such as stiffness, resistance, and resistance direction, and is simple and easy to use. By using the upper and lower test discs on the spring test bench to detect the spring to be tested according to relevant requirements, the structure has strong versatility. For different front suspension coil springs, there are corresponding upper spring associated parts and lower spring associated parts of the coil spring. Therefore, this device only needs to replace the corresponding upper and lower positioning seats to carry out the detection, reducing the tooling cost and production cycle of the detection. Moreover, the test method uses the upper and lower spring associated parts of the coil spring to test the spring, making the test installation state of the spring consistent with the use state, and making the test result consistent with the state of the spring when it is used on the suspension.

[0027] Preferably, as Figure 2 shown, a groove 14 parallel to the threaded ejector rod and penetrating through both side surfaces of the column is provided at the top of the column. A pressing plate 15 is provided in the groove. The end of the pressing plate is connected to the pressing block. When the threaded ejector rod rotates to push the pressing block to move, the pressing plate can slide linearly along the groove. By providing the pressing plate on the column, the integration of the pressing block and the column is realized, ensuring the horizontal linear movement of the pressing block.

[0028] Preferably, a retaining ring 5 is covered above the surface of the groove. The retaining ring is fixed to the top of the column by a limit screw 6, which can prevent the pressing plate from disengaging from above the groove.

[0029] Preferably, an upper clamping groove matching the upper associated part of the spring is provided on the bottom surface of the upper positioning seat, and a lower clamping groove matching the lower associated part of the spring is provided on the surface of the lower positioning seat. The lower clamping groove is concentric with both the central hole of the base and the lower test disc. In the present invention, by utilizing the commonality of the cylindrical surface of the lower associated part of the spring and the coaxiality of the cylinder and the circular hole, the lower associated part of the spring is inserted into the lower clamping groove of the lower positioning seat, so as to ensure concentricity with the lower test disc of the spring test bench during testing through clearance or interference fit.

[0030] Preferably, a V-shaped groove 16 penetrating through the upper and lower surfaces of the pressing block is provided on the side wall of the pressing block close to the central hole, increasing the contact area and friction between the pressing block and the side wall of the lower associated part of the spring, and improving the fastening property of the pressing block to the lower associated part of the spring.

[0031] Preferably, four columns are provided, and the four columns are distributed at 90° azimuths, that is, the same torque is applied from four uniformly distributed directions to push and press the pressing block to fix the lower associated part of the spring, and the stability of the lower associated part of the spring is good, further preventing the spring from tilting and disengaging during the test.

[0032] Preferably, the side wall of the pressing block close to the central hole is arc-shaped, increasing the contact area between the side wall of the pressing block and the lower associated part of the spring and improving the fastening property.

[0033] A detection method for detecting the helical spring of a vehicle suspension includes the following steps: 1) Fix the base on the lower test disc by a lower screw, and assemble the upper end and the lower end of the spring to be tested with the upper associated part of the helical spring and the lower associated part of the helical spring according to the assembly relationship respectively; 2) Install the upper associated part of the helical spring on the upper positioning seat, install the lower associated part of the helical spring on the lower positioning seat, and then fix the upper positioning seat on the upper test disc; 3) Rotate a plurality of threaded ejector rods so that the pressing block can closely fit and press the lower associated part of the spring, and fasten in multiple directions; 4) Use the upper test disc and the lower test disc on the spring test bench to detect the spring to be tested as required.

[0034] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only for the specific embodiments of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A detection device for detecting the coil spring of a vehicle suspension, characterized in that, it includes a base (1) provided with a central hole. The lower end of the lower screw (8) passes through the central hole of the base (1) and is threadedly connected to the lower test disc of the spring test bench. Above the central hole of the base (1), a lower positioning seat (7) adapted to be connected to the lower associated part (9) of the spring is coaxially installed. On the surface of the base (1), a plurality of upright columns (2) are provided along the circumferential direction of the central hole. A threaded ejector rod (3) arranged in the radial direction of the central hole is threadedly connected to the upright columns (2). A pressing block (4) is provided at the front end of the threaded ejector rod (3). When the threaded ejector rod (3) rotates, it can push the pressing block (4) to move horizontally towards the central hole. It also includes an upper positioning seat (12) adapted to be connected to the upper associated part (11) of the spring. The upper end of the upper screw (13) passes through the holes corresponding to the centers of the upper associated part (11) of the spring and the upper positioning seat (12) and is threadedly connected to the upper test disc of the spring test bench; The bottom surface of the upper positioning seat (12) is provided with an upper card slot matching the upper associated part (11) of the spring, and the surface of the lower positioning seat (7) is provided with a lower card slot matching the lower associated part (9) of the spring; On the side wall of the pressing block (4) close to the central hole, a V-shaped groove (16) penetrating the upper and lower surfaces of the pressing block (4) is provided.

2. The detection device for detecting the coil spring of a vehicle suspension according to claim 1, characterized in that, the top end of the upright column (2) is provided with a groove (14) parallel to the threaded ejector rod (3) and penetrating both side surfaces of the upright column (2). A pressing plate (15) is arranged in the groove (14). The end of the pressing plate (15) is connected to the pressing block (4). When the threaded ejector rod (3) rotates to push the pressing block (4) to move, the pressing plate (15) can slide linearly along the groove (14).

3. The detection device for detecting the coil spring of a vehicle suspension according to claim 2, characterized in that, a retaining ring (5) is covered above the surface of the groove (14), and the retaining ring (5) is fixed to the top end of the upright column by a limit screw (6).

4. The detection device for detecting the coil spring of a vehicle suspension according to claim 1, characterized in that, there are four upright columns (2), and the four upright columns (2) are distributed at 90° azimuths.

5. The detection device for detecting the coil spring of a vehicle suspension according to claim 1, characterized in that, the side wall of the pressing block (4) close to the central hole is arc-shaped.

6. A detection method for detecting the coil spring of a vehicle suspension, characterized in that, The following steps are included: 1) Fix the base in the detection device according to any one of claims 1-5 on the lower test disc by screwing, and assemble the upper and lower ends of the spring to be tested with the upper associated part of the helical spring and the lower associated part of the helical spring according to the assembly relationship; 2) Install the upper associated part of the helical spring on the upper positioning seat, install the lower associated part of the helical spring on the lower positioning seat, and then fix the upper positioning seat on the upper test disc; 3) Rotate a plurality of threaded ejector rods so that the pressing block can tightly fit and press against the lower associated part of the spring, and fasten in multiple directions; 4) Use the upper test disc and the lower test disc on the spring test bench to detect the spring to be tested as required.

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