A fixing device for straight selling ball hinge stiffness test

Abstract

The utility model discloses a kind of fixing devices for straight sale ball hinge rigidity test, including base, detachable sleeve is arranged in the middle part of base, the upper end of sleeve is slidably connected with clamping umbrella cover;Ball seat fixed plate is set above clamping umbrella cover, one end of ball seat fixed plate is provided with mounting hole, radial limit block is arranged on one side of mounting hole, radial limit block is detachably connected with ball seat fixed plate, axial compression block is rotationally arranged on the upside of mounting hole, first sensor is horizontally penetrated in the side portion of radial limit block, second sensor is vertically penetrated in the middle portion of axial compression block.The utility model can solve the problem that the existing ball hinge fixing device is mostly bolted compression block mode to compress ball hinge, easy to loosen, and there is always gap between thread after bolt locking of compression block, leading to deformation of part when subjected to radial loading force in rigidity test process, leading to inaccurate test result.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive component fixing devices, specifically a fixing device for testing the stiffness of a direct-pin ball hinge. Background Technology

[0002] A ball joint includes a ball seat and a ball pin (such as...) Figure 9 As shown in the image, ball joints are widely used in many fields such as automobiles and machinery. Their stiffness performance has a crucial impact on the stability and reliability of the entire system. Ball joints are important connecting components between the steering knuckle and the subframe. As a guide and support for the suspension, they play a role in shock absorption on the road, making driving more comfortable. Their stiffness must meet design requirements to ensure the safety of passengers. Currently, when conducting stiffness tests on ball joints, existing methods of fixing them mostly use bolt clamping blocks. The specifications and number of bolts are limited by space, resulting in insufficient preload and easy loosening. The contact between the clamping block and the ball pin is a point / line contact, with a small contact area and uneven pressure distribution. After the clamping block is tightened with bolts, there will always be gaps between the threads. When the part is subjected to radial loading during stiffness testing, the insufficient rigidity of the tooling itself will cause deformation, leading to inaccurate test results. Secondly, the bolt clamping block and sleeve are integrated, resulting in low versatility. Each part must have a sleeve designed, which not only increases testing costs but also reduces testing efficiency. Avoiding the aforementioned common problems is a key aspect of designing ball joint stiffness testing fixtures. Therefore, developing a new ball joint stiffness testing fixture is of significant practical importance. Utility Model Content

[0003] This utility model provides a fixing device for stiffness testing of direct-spindle ball hinges. It can solve the problems that existing ball hinge fixing devices mostly use bolt clamping blocks to clamp the ball hinges, which are prone to loosening. Moreover, after the clamping blocks are tightened with bolts, there will always be gaps between the threads, which will cause the parts to deform easily when subjected to radial loading force during stiffness testing, resulting in inaccurate test results.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fixing device for a stiffness test of a direct-spindle ball hinge, comprising a base, a sleeve detachably disposed in the middle of the base, and a clamping umbrella sleeve slidably connected to the upper end of the sleeve; a ball seat fixing plate disposed above the clamping umbrella sleeve, one end of the ball seat fixing plate having a mounting hole for placing the ball seat, a radial limiting block being disposed on one side of the mounting hole, the radial limiting block being detachably connected to the ball seat fixing plate, an axial pressing block being screwed onto the upper side of the mounting hole, a first sensor being horizontally inserted through the side of the radial limiting block, and a second sensor being vertically inserted through the middle of the axial pressing block; the clamping umbrella sleeve includes a connecting part inserted into the sleeve, the upper part of the connecting part... The side is fixed with a mounting part for installing the ball pin. The mounting part is frustoconical and has a positioning hole at its center. The mounting part has several slots along the circumferential direction, which divide the mounting part into multiple petal-shaped bodies. The mounting part for clamping the umbrella sleeve is designed with a slotted petal-shaped structure. The petal-shaped bodies can tighten evenly, achieving uniform clamping of the ball pin. This avoids the problem of uneven pressure distribution caused by traditional point or line contact, and the clamping force is stable and reliable. The ball seat fixing plate is provided with an axial pressing block and a radial limiting block to fix the ball seat radially and axially, ensuring that the ball seat will not shift during the test and guaranteeing the accuracy of the test. A first sensor and a second sensor are equipped to detect the radial and axial displacement of the ball seat in real time, respectively.

[0005] As a supplement to the technical solution described in this utility model, a displacement sensor fixing bracket is detachably provided on the outer periphery of the sleeve. Both the first sensor and the second sensor are connected to the displacement sensor fixing bracket. The displacement sensor fixing bracket provides support for the first sensor and the second sensor, ensuring that the sensor is stable in position during the test and will not shake due to external factors, thus ensuring the reliability of the measurement data.

[0006] As a supplement to the technical solution described in this utility model, the displacement sensor fixing bracket includes a U-shaped bracket, and a pressure plate is provided at the lower end of the U-shaped bracket. The first end of the pressure plate is hinged to the U-shaped bracket, and the second end of the pressure plate is connected to the U-shaped bracket by fasteners. The pressure plate is used to install the displacement sensor fixing bracket on the sleeve.

[0007] As a supplement to the technical solution described in this utility model, the U-shaped bracket is equipped with eccentric hexagonal blocks connected to the positions near the first and second sensors by fasteners, and the side walls of the eccentric hexagonal blocks abut against the first and second sensors to fix them.

[0008] As a supplement to the technical solution described in this utility model, the base includes a fixed support, and a fixing block is connected to one side of the fixed support by fasteners, and the sleeve is clamped and fixed by the fixed support and the fixing block.

[0009] As a supplement to the technical solution described in this utility model, the upper end of the sleeve is provided with a conical hole that matches the mounting part, and the lower side of the conical hole is provided with a receiving cavity for accommodating the connecting part. A bolt is passed through the lower end of the sleeve to connect the sleeve to the clamping umbrella cover. By tightening the bolt, the mounting part of the clamping umbrella cover moves downward along the conical surface of the conical hole, and the petal-shaped body gradually contracts and deforms to tightly hold the ball pin to be tested.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] With a simple structure and convenient operation, the clamping umbrella cover mounting part is designed with a slotted petal structure. The petal structure can tighten evenly, achieving uniform clamping of the ball pin, avoiding the problem of uneven pressure distribution caused by traditional point or line contact. The clamping force is stable and reliable. The ball seat fixing plate is equipped with an axial clamping block and a radial limiting block, fixing the ball seat radially and axially to ensure that the ball seat will not shift during the test, guaranteeing the accuracy of the test. It is equipped with a first sensor and a second sensor to detect radial and axial displacement in real time, respectively. Both the axial clamping block and the radial limiting block are detachably connected to the ball seat fixing plate. The connection method of each component is simple, and the installation and disassembly process is convenient, effectively improving test efficiency. This device solves the problem that existing ball hinge fixing devices mostly use bolt clamping blocks to clamp the ball hinge, which are prone to loosening. Furthermore, after the clamping blocks are tightened with bolts, gaps always remain between the threads, causing the parts to deform easily under radial loading during stiffness testing, leading to inaccurate test results. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a front sectional view of the present invention;

[0014] Figure 3 This is a front sectional view of the working state of this utility model;

[0015] Figure 4 This is an exploded view of the present invention;

[0016] Figure 5 This is a three-dimensional structural diagram of the clamping umbrella cover of this utility model;

[0017] Figure 6 This is a cross-sectional view of the sleeve of this utility model;

[0018] Figure 7 This is a three-dimensional structural diagram of the displacement sensor fixing bracket of this utility model;

[0019] Figure 8 This is a three-dimensional structural diagram of the base of this utility model;

[0020] Figure 9 This is a structural diagram of the product of this utility model.

[0021] Figure label:

[0022] 1. Clamping umbrella cover; 11. Connecting part; 12. Mounting part; 13. Positioning hole; 14. Slot; 2. Sleeve; 21. Receiving cavity; 22. Conical hole; 3. Ball hinge; 31. Ball seat; 32. Ball pin; 4. Ball seat fixing plate; 41. Mounting hole; 5. Bolt; 6. First sensor; 61. Second sensor; 7. Displacement sensor fixing bracket; 71. U-shaped bracket; 72. Pressure plate; 8. Axial clamping block; 9. Radial limiting block; 10. Eccentric hexagonal block; 15. Base; 151. Fixed support; 152. Fixing block. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] The embodiments of this utility model relate to a fixing device for testing the stiffness of a straight ball hinge, such as... Figure 1-9As shown, the device includes a base 15, with a sleeve 2 detachably mounted in the middle of the base 15. A clamping umbrella sleeve 1 is slidably connected to the upper end of the sleeve 2. The clamping umbrella sleeve 1 is made of spring steel, maintaining sufficient elastic deformation even after repeated use. The sleeve 2 is made of 40Cr alloy steel and heat-treated to HRC38-45, possessing both high strength and fatigue resistance, extending service life and maintaining long-term non-deformation. A ball seat fixing plate 4 is positioned above the clamping umbrella sleeve 1. One end of the ball seat fixing plate 4 has a mounting hole 41 for placing a ball seat 31. A radial limiting block 9 is provided on one side of the mounting hole 41, detachably connected to the ball seat fixing plate 4. An axial pressing block 8 is screwed onto the upper side of the mounting hole 41. A first sensor 6 is horizontally inserted through the side of the radial limiting block 9, and a second sensor 61 is vertically inserted through the middle of the axial pressing block 8. The clamping umbrella sleeve 1 includes components inserted into... The connecting part 11 inside the sleeve 2 has a mounting part 12 fixedly provided on its upper side for mounting the ball pin 32. The mounting part 12 is truncated cone-shaped, and a positioning hole 13 is provided at the center of the mounting part 12. The positioning hole 13 is adapted to the outer diameter of the ball pin 32. The mounting part 12 has 8 slots 14 along the circumferential direction, which divide the mounting part 12 into 8 petal-shaped bodies. The mounting part 12 for clamping the umbrella sleeve 1 is designed as a slotted petal-shaped structure. The petal-shaped bodies can be tightened evenly to achieve uniform clamping of the ball pin, avoiding the problem of uneven pressure distribution caused by traditional point or line contact. Moreover, the clamping force is stable and reliable. The ball seat fixing plate 4 is provided with an axial pressing block 8 and a radial limiting block 9 to fix the ball seat radially and axially, ensuring that the ball seat will not shift during the test and ensuring the accuracy of the test. The first sensor 6 and the second sensor 61 are equipped to detect the radial and axial displacement of the ball seat in real time, respectively.

[0025] In this embodiment, as Figure 1 As shown, a displacement sensor fixing bracket 7 is detachably provided on the outer periphery of the sleeve 2. The first sensor 6 and the second sensor 61 are both connected to the displacement sensor fixing bracket 7. The displacement sensor fixing bracket 7 provides support for the first sensor 6 and the second sensor 61, ensuring that the sensor is stable in position during the test and will not shake due to external factors, thus ensuring the reliability of the measurement data.

[0026] In this embodiment, as Figure 7 As shown, the displacement sensor fixing bracket 7 includes a U-shaped bracket 71, and a pressure plate 72 is provided at the lower end of the U-shaped bracket 71. The first end of the pressure plate 72 is hinged to the U-shaped bracket 71, and the second end of the pressure plate 72 is connected to the U-shaped bracket 71 by fasteners. The pressure plate 72 is used to install the displacement sensor fixing bracket 7 on the sleeve 2.

[0027] In this embodiment, as Figure 1As shown, eccentric hexagonal blocks 10 are fastened to the U-shaped bracket 71 near the first sensor 6 and the second sensor 61, and the sidewalls of the eccentric hexagonal blocks 10 abut against the first sensor 6 and the second sensor 61 to fix them.

[0028] In this embodiment, as Figure 8 As shown, the base 15 includes a fixed support 151, and a fixing block 152 is connected to one side of the fixed support 151 by a fastener. The sleeve 2 is clamped and fixed by the fixed support 151 and the fixing block 152.

[0029] In this embodiment, as Figure 2 and Figure 6 As shown, the upper end of the sleeve 2 is provided with a conical hole 22 that matches the mounting part 12. The lower side of the conical hole 22 is provided with a receiving cavity 21 for accommodating the connecting part 11. The lower end of the sleeve 2 is provided with a bolt 5 to connect the sleeve 2 to the clamping umbrella cover 1. By tightening the bolt 5, the mounting part 12 of the clamping umbrella cover 1 moves downward along the conical surface of the conical hole 22, and the petal gradually contracts and deforms to tightly hold the ball pin 32 to be tested.

[0030] In this embodiment, as Figure 1As shown, the connecting part 11 of the clamping umbrella cover 1 is inserted into the receiving cavity 21 of the sleeve 2, the mounting part 12 is placed in the conical hole 22, and the sleeve 2 and the clamping umbrella cover 1 are initially connected with bolts 5, but not tightened yet; the pressure plate 72 of the displacement sensor fixing bracket 7 is opened, and the U-shaped bracket 71 is placed on the outer periphery of the upper end of the sleeve 2. The sleeve 2 is clamped by rotating the pressure plate 72, and the end of the pressure plate 72 is connected to the U-shaped bracket 71 by fasteners; at the same time, the ball pin 32 at the lower end of the ball hinge 3 is inserted into the clamping umbrella cover mounting part. In the positioning hole 13 of part 12, tighten the bolt 5 connecting the bottom of sleeve 2 to clamping umbrella sleeve 1. During the tightening process, the mounting part 12 of clamping umbrella sleeve 1 moves downward in the conical hole 22. Due to the cooperation of the conical hole 22 and the frustum-shaped structure of mounting part 12, multiple petal-shaped bodies undergo elastic deformation and tightly hold the ball pin 32. At the same time, the mounting hole 41 of ball seat fixing plate 4 is fitted onto the outside of ball seat 31 of ball hinge 3. Continue to install radial limiting block 9 so that it contacts the side of ball seat 31, and use bolts to connect the radial... The limiting block 9 is fixed on the ball seat fixing plate 4 to achieve radial fixation of the ball seat 31. The axial clamping block 8 is placed on the upper side of the mounting hole 41 and rotated to connect the axial clamping block 8 with the ball seat fixing plate 4. The lower end of the axial clamping block 8 contacts the upper end of the ball seat 31 and applies a certain pressure to achieve axial fixation of the ball seat 31. The first sensor 6 is horizontally inserted into the side of the U-shaped bracket 71. The measuring end of the first sensor 6 passes through the radial limiting block 9 and is located on the side of the ball seat 31. By rotating the eccentric hexagonal block 1... 0. Fix the first sensor 6, and vertically insert the second sensor 61 into the upper part of the U-shaped bracket 71. The measuring end of the second sensor 61 passes through the axial clamping block 8 and is located on the upper side of the ball seat 31. Fix the second sensor 61 by rotating the eccentric hexagonal block 10. Install the sleeve 2 on the base 15. Clamp and fix the sleeve 2 by fixing the support 151 and the fixing block 152. Install the base 15 and the ball seat fixing plate 4 on the test equipment with bolts. Start the test equipment and test the ball hinge 3.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A fixing device for testing the stiffness of a direct-pin ball hinge, characterized in that, include: The base (15) has a sleeve (2) detachably provided in the middle part of the base (15), and a clamping umbrella cover (1) is slidably connected to the upper end of the sleeve (2). A ball seat fixing plate (4) is set above the clamping umbrella cover (1). One end of the ball seat fixing plate (4) is provided with a mounting hole (41) for placing the ball seat (31). A radial limiting block (9) is provided on one side of the mounting hole (41). The radial limiting block (9) is detachably connected to the ball seat fixing plate (4). An axial pressing block (8) is screwed on the upper side of the mounting hole (41). A first sensor (6) is horizontally inserted through the side of the radial limiting block (9). A second sensor (61) is vertically inserted through the middle of the axial pressing block (8). The clamping umbrella cover (1) includes a connecting part (11) inserted into the sleeve (2). The upper side of the connecting part (11) is fixedly provided with a mounting part (12) for installing the ball pin (32). The mounting part (12) is frustoconical in shape. A positioning hole (13) is provided at the center of the mounting part (12). The mounting part (12) has several slots (14) along the circumferential direction. The slots (14) divide the mounting part (12) into multiple petal-shaped bodies.

2. The fixing device for the stiffness test of a direct-pin ball hinge according to claim 1, characterized in that: The sleeve (2) is detachably provided with a displacement sensor fixing bracket (7) on its outer periphery. The first sensor (6) and the second sensor (61) are both connected to the displacement sensor fixing bracket (7).

3. The fixing device for the stiffness test of a direct-pin ball hinge according to claim 2, characterized in that: The displacement sensor fixing bracket (7) includes a U-shaped bracket (71), and a pressure plate (72) is provided at the lower end of the U-shaped bracket (71). The first end of the pressure plate (72) is hinged to the U-shaped bracket (71), and the second end of the pressure plate (72) is connected to the U-shaped bracket (71) by fasteners.

4. The fixing device for the stiffness test of a direct-pin ball hinge according to claim 3, characterized in that: On the U-shaped bracket (71), near the first sensor (6) and the second sensor (61), there are eccentric hexagonal blocks (10) connected by fasteners.

5. The fixing device for stiffness testing of a direct-pin ball hinge according to claim 1, characterized in that: The base (15) includes a fixed support (151), and a fixed block (152) is connected to one side of the fixed support (151) by a fastener.

6. The fixing device for the stiffness test of a direct-pin ball hinge according to claim 1, characterized in that: The upper end of the sleeve (2) is provided with a tapered hole (22) that matches the mounting part (12). The lower side of the tapered hole (22) is provided with a receiving cavity (21) for accommodating the connecting part (11). The lower end of the sleeve (2) is provided with a bolt (5) to connect the sleeve (2) to the clamping umbrella cover (1).

Images