Valve core automatic torsion testing equipment

Abstract

The utility model discloses a valve core automatic torsion test equipment belongs to valve core torsion detection technical field. Valve core automatic torsion test equipment, including the mechanical arm of installation in the inside of cabinet and the test assembly of installation in the working end of mechanical arm, the test assembly is used to detect the valve core torsion, the test assembly includes the mounting bracket of installation in the working end of mechanical arm and the torsion sensor of fixed in the side of mounting bracket, the lower end of test axle of torsion sensor is equipped with test tooling, the utility model discloses through the mechanical arm drive test tooling cover sets in the valve core surface, makes servo motor drive torsion sensor's test axle and test tooling to rotate to the torsion data of valve core is tested to can accurate control the force size, improves the test accuracy, and can further improve the test efficiency to the valve core automatic test.

Description

Technical Field

[0001] This utility model relates to the field of valve core torque detection technology, and in particular to automatic valve core torque testing equipment. Background Technology

[0002] In the field of valve manufacturing, the rotational torque of the valve core is a core indicator for measuring its sealing performance, durability, and assembly quality. Currently, the industry generally adopts a manual torque testing method: operators use a torque wrench to manually rotate the valve core and record the torque data by reading the wrench scale value.

[0003] However, due to differences in manual application techniques (such as uneven application angle and speed), data fluctuations are easily caused, and operator fatigue will further amplify the error, resulting in poor test accuracy. In addition, each test requires manual operation throughout, which is inefficient and difficult to meet the needs of mass production. Utility Model Content

[0004] The purpose of this invention is to solve the problems of poor testing accuracy and low testing efficiency in the existing technology, and to propose an automatic torque testing device for valve cores.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The automatic torque testing equipment for valve cores includes a robotic arm installed inside a cabinet and a testing component installed at the working end of the robotic arm. The testing component is used to detect the torque of the valve core. The testing component includes a mounting bracket installed at the working end of the robotic arm and a torque sensor fixed to the side of the mounting bracket. A testing fixture is installed at the lower end of the test shaft of the torque sensor.

[0007] In some embodiments, the lower end of the test fixture is provided with a contour groove that matches the shape of the valve core, and a servo motor for driving the test shaft of the torque sensor to rotate is fixed on the upper surface of the mounting bracket.

[0008] In some embodiments, the bottom of the cabinet is provided with a dual-station alternating structure, and positioning fixtures are respectively installed on the two station surfaces of the dual-station alternating structure. The positioning fixtures are used to install and position the workpiece to be measured, and the two positioning fixtures are respectively located inside the cabinet and on the side of the cabinet.

[0009] In some embodiments, the mounting bracket is fixed to the working end of the robotic arm by a compensation component. The compensation component is used to compensate for the positional error when the test fixture is fitted onto the valve core surface. The test component is positioned secondary with the valve core by a positioning component, and the positioning component cooperates with the compensation component.

[0010] In some embodiments, the compensation component includes a fixed sleeve fixed to the working end of the robotic arm and a horizontal compensation shaft that moves horizontally within the fixed sleeve. A plurality of first springs are uniformly fixed inside the fixed sleeve, and the first springs are used to drive the horizontal compensation shaft to slide to a position coaxial with the fixed sleeve.

[0011] In some embodiments, a connecting shell is fixed to the lower end of the horizontal compensation shaft, and a buffer block slides vertically inside the connecting shell via a guide rod. A second spring is sleeved on the surface of the guide rod, and the second spring is located above the buffer block.

[0012] In some embodiments, the positioning component cooperates with the compensation component. The positioning component includes a positioning rod fixed to the front end of the mounting bracket and a positioning sleeve fixed to the surface of the positioning fixture. The distance between the positioning rod and the testing fixture is the same as the distance between the positioning sleeve and the valve core.

[0013] In some embodiments, two positioning blocks are symmetrically fixed on the surface of the positioning rod, and two positioning grooves are symmetrically opened on the upper surface of the positioning sleeve. When the positioning rod is inserted into the positioning sleeve and the positioning blocks are engaged in the positioning grooves, the test fixture is sleeved on the surface of the valve core.

[0014] In some embodiments, the test fixture is mounted on the lower end of the test shaft of the torque sensor by a plurality of bolts.

[0015] Compared with the prior art, the present invention provides an automatic torque testing device for valve cores, which has the following beneficial effects.

[0016] 1. This utility model uses a robotic arm to drive a test fixture to be mounted on the surface of the valve core. A servo motor drives the test shaft of the torque sensor and the test fixture to rotate, thereby testing the torque data of the valve core. This allows for precise control of the applied force, improving test accuracy. Furthermore, automatic testing of the valve core can further improve testing efficiency.

[0017] 2. This utility model, by setting up a compensation component and a positioning component, enables the horizontal compensation shaft to move horizontally inside the fixed sleeve, thereby facilitating the compensation of deviations and allowing the test fixture to be smoothly fitted onto the valve core surface, avoiding the positional deviations that occur when the dual-station alternating structure replaces the workpiece being tested, thus avoiding the impact of these deviations on the testing process.

[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the robotic arm and testing components in this utility model.

[0022] Figure 4 This is a schematic diagram of the test component in this utility model.

[0023] Figure 5 This is a cross-sectional structural diagram of the compensation component in this utility model.

[0024] Figure 6 This is a schematic diagram of the usage state structure of the test component in this utility model.

[0025] Figure 7 This utility model Figure 6 Enlarged structural diagram at point A in the middle.

[0026] In the picture:

[0027] 1. Cabinet; 2. Robotic arm; 3. Testing assembly; 301. Mounting bracket; 302. Torque sensor; 303. Servo motor; 304. Testing fixture; 4. Compensation assembly; 401. Fixing sleeve; 402. Horizontal compensation shaft; 403. First spring; 404. Connecting shell; 405. Guide rod; 406. Buffer block; 407. Second spring; 5. Positioning fixture; 6. Workpiece under test; 601. Valve core; 7. Dual-station alternating structure; 8. Positioning assembly; 801. Positioning rod; 802. Positioning sleeve; 803. Positioning block; 804. Positioning groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Reference Figure 1-7 The automatic torque testing equipment for valve cores includes a robotic arm 2 installed inside a cabinet 1 and a testing component 3 installed at the working end of the robotic arm 2. The testing component 3 is used to detect the torque of the valve core 601. The testing component 3 includes a mounting bracket 301 installed at the working end of the robotic arm 2 and a torque sensor 302 fixed to the side of the mounting bracket 301. A testing fixture 304 is installed at the lower end of the testing shaft of the torque sensor 302. The lower end of the testing fixture 304 has a contour groove that matches the shape of the valve core 601. A servo motor 303 for driving the testing shaft of the torque sensor 302 to rotate is fixed on the upper surface of the mounting bracket 301. The testing fixture 304 is installed at the lower end of the testing shaft of the torque sensor 302 by multiple bolts.

[0030] The bottom of the cabinet 1 is provided with a dual-station alternating structure 7. The two station surfaces of the dual-station alternating structure 7 are respectively equipped with positioning fixtures 5. The positioning fixtures 5 are used to install and position the workpiece 6 to be measured. The two positioning fixtures 5 are located inside the cabinet 1 and on the side of the cabinet 1, respectively. The dual-station alternating structure 7 is existing technology, so it will not be described in detail.

[0031] Understandably, by setting up the dual-station alternating structure 7, it is convenient to perform material loading and torque testing simultaneously, thereby improving testing efficiency. The robotic arm 2 drives the testing component 3 to move above the valve core 601 of the workpiece 6 under test, and the contour groove of the testing fixture 304 is fitted onto the surface of the valve core 601. The servo motor 303 drives the testing shaft of the torque sensor 302 and the testing fixture 304 to rotate, thereby testing the torque data of the valve core 601. Since there are two valve cores 601 on the surface of the workpiece 6 under test, the robotic arm 2 can drive the testing component 3 to perform torque testing on the two valve cores 601 in sequence. The servo motor 303 drives the torque sensor 302 to rotate, thereby accurately controlling the magnitude of the applied force and improving testing accuracy. At the same time, the automatic testing of the valve core 601 can further improve testing efficiency.

[0032] Specifically, the mounting bracket 301 is fixed to the working end of the robotic arm 2 by the compensation component 4. The compensation component 4 is used to compensate for the positional error when the test fixture 304 is sleeved on the surface of the valve core 601. The compensation component 4 includes a fixed sleeve 401 fixed to the working end of the robotic arm 2 and a horizontal compensation shaft 402 that moves horizontally within the fixed sleeve 401. The horizontal compensation shaft 402 is a stepped shaft with a diameter at the upper end larger than that at the lower end. The upper end of the horizontal compensation shaft 402 is located inside the fixed sleeve 401. Multiple first springs 403 are uniformly fixed inside the fixed sleeve 401. The first springs 403 are used to drive the horizontal compensation shaft 402 to slide to a position coaxial with the fixed sleeve 401.

[0033] A connecting shell 404 is fixed to the lower end of the horizontal compensation shaft 402. A guide rod 405 is vertically fixed inside the connecting shell 404. A buffer block 406 slides on the surface of the guide rod 405. A second spring 407 is sleeved on the surface of the guide rod 405. The second spring 407 is located above the buffer block 406. The buffer block 406 is fixed to the back of the mounting bracket 301.

[0034] It is understandable that the position of the two workpieces 6 being tested is deviated because the two workpieces 6 are replaced by the alternating structure 7 of the dual station. Therefore, by setting the compensation component 4, the horizontal compensation shaft 402 is moved horizontally inside the fixed sleeve 401, so as to facilitate the compensation of the deviation and make the test fixture 304 smoothly fitted onto the surface of the valve core 601.

[0035] Because the valve core 601 is irregularly shaped, when the initial angle of the valve core 601 is different, the contour groove of the test fixture 304 cannot completely correspond to the valve core 601, resulting in the test fixture 304 being unable to be fitted onto the surface of the valve core 601. Therefore, by setting a buffer block 406 and a second spring 407, when the test fixture 304 abuts against the surface of the valve core 601, the buffer block 406 slides upward on the surface of the guide rod 405, causing the test assembly 3 to be buffered upward as a whole. At the same time, the test fixture 304 continues to rotate. When the contour groove completely corresponds to the valve core 601, the second spring 407 pushes the buffer block 406 and the test assembly 3 downward, so that the test fixture 304 can be fitted onto the surface of the valve core 601.

[0036] Specifically, the test component 3 is positioned secondary with the valve core 601 through the positioning component 8. The positioning component 8 cooperates with the compensation component 4. The positioning component 8 includes a positioning rod 801 fixed to the front end of the mounting bracket 301 and a positioning sleeve 802 fixed to the surface of the positioning fixture 5. The distance between the positioning rod 801 and the test fixture 304 is the same as the distance between the positioning sleeve 802 and the valve core 601.

[0037] Two positioning blocks 803 are symmetrically fixed on the surface of the positioning rod 801. Two positioning grooves 804 are symmetrically opened on the upper surface of the positioning sleeve 802. When the positioning rod 801 is inserted into the positioning sleeve 802 and the positioning blocks 803 are engaged in the positioning grooves 804, the test fixture 304 is sleeved on the surface of the valve core 601. The surfaces of the positioning blocks 803 and the positioning grooves 804 are respectively provided with inclined surfaces to facilitate the positioning blocks 803 entering the positioning grooves 804.

[0038] Understandably, by setting the positioning component 8, when the test fixture 304 is about to contact the valve core 601, the positioning rod 801 is first inserted into the positioning sleeve 802. As the positioning rod 801 continues to descend, the positioning block 803 is engaged in the positioning groove 804. Under the action of the compensation component 4, the position of the test fixture 304 is automatically adjusted, thereby performing secondary positioning of the position of the test fixture 304, so that the test fixture 304 can be smoothly fitted onto the surface of the valve core 601.

[0039] In this invention, a dual-station alternating structure 7 is used to sequentially move the workpiece 6 to be tested into the cabinet 1. A robotic arm 2 drives the testing assembly 3 closer to the valve core 601. Just as the testing fixture 304 is about to contact the valve core 601, the positioning rod 801 first inserts into the positioning sleeve 802. As the positioning rod 801 continues to descend, the positioning block 803 engages with the positioning groove 804. Under the action of the compensation assembly 4, the horizontal compensation shaft 402 moves horizontally within the fixed sleeve 401 to compensate for deviations, thereby performing secondary positioning of the testing fixture 304. This allows the testing fixture 304 to be smoothly fitted onto the surface of the valve core 601. The servo motor 303 drives the test shaft of the torque sensor 302 and the test fixture 304 to rotate, thereby testing the torque data of the valve core 601. Since there are two valve cores 601 on the surface of the workpiece 6 under test, the robotic arm 2 can drive the test assembly 3 to perform torque tests on the two valve cores 601 in sequence. By driving the torque sensor 302 to rotate through the servo motor 303, the magnitude of the applied force can be precisely controlled, improving the test accuracy. At the same time, automatic testing of the valve cores 601 can further improve the testing efficiency. By using bolts to install the test fixture 304, torque tests can be performed on different types of valve cores 601.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples; although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic torque testing device for valve cores, characterized in that, The device includes a robotic arm (2) installed inside the cabinet (1) and a test assembly (3) installed at the working end of the robotic arm (2). The test assembly (3) is used to detect the torque of the valve core (601). The test assembly (3) includes a mounting bracket (301) installed at the working end of the robotic arm (2) and a torque sensor (302) fixed on the side of the mounting bracket (301). A test fixture (304) is installed at the lower end of the test shaft of the torque sensor (302).

2. The automatic torque testing equipment for valve cores according to claim 1, characterized in that, The lower end of the test fixture (304) is provided with a contour groove that matches the shape of the valve core (601), and the upper surface of the mounting bracket (301) is fixed with a servo motor (303) for driving the test shaft of the torque sensor (302) to rotate.

3. The automatic torque testing equipment for valve cores according to claim 1, characterized in that, The bottom of the cabinet (1) is provided with a dual-station alternating structure (7). The two workstation surfaces of the dual-station alternating structure (7) are respectively equipped with positioning fixtures (5). The positioning fixtures (5) are used to install and position the workpiece (6) to be measured. The two positioning fixtures (5) are located inside the cabinet (1) and on the side of the cabinet (1).

4. The automatic torque testing equipment for valve cores according to claim 1, characterized in that, The mounting bracket (301) is fixed to the working end of the robotic arm (2) by the compensation component (4). The compensation component (4) is used to compensate for the position error when the test fixture (304) is fitted onto the surface of the valve core (601). The test component (3) is positioned with the valve core (601) by the positioning component (8). The positioning component (8) cooperates with the compensation component (4).

5. The automatic torque testing equipment for valve cores according to claim 4, characterized in that, The compensation component (4) includes a fixed sleeve (401) fixed to the working end of the robotic arm (2) and a horizontal compensation shaft (402) that moves horizontally within the fixed sleeve (401). A plurality of first springs (403) are uniformly fixed inside the fixed sleeve (401). The first springs (403) are used to drive the horizontal compensation shaft (402) to slide to a position coaxial with the fixed sleeve (401).

6. The automatic torque testing equipment for valve cores according to claim 5, characterized in that, The lower end of the horizontal compensation shaft (402) is fixed with a connecting shell (404). Inside the connecting shell (404), a buffer block (406) slides vertically through a guide rod (405). A second spring (407) is sleeved on the surface of the guide rod (405), and the second spring (407) is located above the buffer block (406).

7. The automatic valve core torque testing device according to claim 4, characterized in that, The positioning component (8) includes a positioning rod (801) fixed to the front end of the mounting bracket (301) and a positioning sleeve (802) fixed to the surface of the positioning fixture (5). The distance between the positioning rod (801) and the test fixture (304) is the same as the distance between the positioning sleeve (802) and the valve core (601).

8. The automatic valve core torque testing device according to claim 7, characterized in that, The positioning rod (801) has two symmetrically fixed positioning blocks (803) on its surface, and the positioning sleeve (802) has two symmetrically opened positioning grooves (804) on its upper surface. When the positioning rod (801) is inserted into the positioning sleeve (802) and the positioning blocks (803) are engaged in the positioning grooves (804), the test fixture (304) is sleeved on the surface of the valve core (601).

9. The automatic torque testing equipment for valve cores according to claim 1, characterized in that, The test fixture (304) is mounted on the lower end of the test shaft of the torque sensor (302) by multiple bolts.

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