A test block structure, a test fixture for hydraulic valves, and a disassembly fixture for hydraulic valves

Abstract

The present disclosure provides a test block structure, a test tool for hydraulic valves and a disassembly tool for hydraulic valves, the test block structure is used for testing of hydraulic valves, the test block structure comprises a test block, a first groove is formed in an end of the test block, a boss is formed by extending outward from a bottom wall of the first groove, a first mounting hole is formed in the boss, at least part of the hydraulic valve is matched with the first mounting hole, and a plurality of liquid passing openings are arranged on a side of the test block. The end of the test block of the present disclosure has the first groove and the boss, and a gap is formed between the first groove and the boss, when the valve body and the valve sleeve of the hydraulic valve are disassembled, the gap provides a working space for the disassembly tool, and the disassembly work is facilitated, and the present disclosure provides a scheme for improving the test reliability, the disassembly portability and the appearance integrity of the hydraulic valve, and provides protection for the qualified rate of the hydraulic valve product.

Description

Technical Field

[0001] This disclosure relates to the technical field of testing equipment for hydraulic valves, and in particular to a test block structure, a testing fixture for hydraulic valves, and a disassembly fixture for hydraulic valves. Background Technology

[0002] High-speed switching valves are hydraulic components controlled by PWM signals. Due to their discrete output characteristics, they are widely used as digital hydraulic components. As the size of high-speed switching valve products continues to shrink, product testing faces numerous challenges. Among these, the installation and disassembly methods used in laboratory testing directly affect the final performance and form of the product. Current technologies offer limited testing and disassembly methods for miniature high-speed switching valves, often employing rough methods for fixing or prying, resulting in a high product damage rate. Furthermore, during the assembly phase of miniature high-speed switching valve testing, due to their small stroke (approximately 0.2 mm), repeated disassembly and reassembly are necessary to adjust the stroke to the target value. Therefore, during testing, the valve sleeve and valve body (yoke) are often not fixed together. In existing technologies, removing the valve sleeve easily damages its surface, affecting the product yield. Summary of the Invention

[0003] This disclosure aims to at least address the technical problems existing in the prior art, such as the easy damage to the valve body surface during testing, resulting in distorted test results, and the damage to the surface of the valve body and valve sleeve during disassembly.

[0004] Therefore, one object of this disclosure is to provide a test block structure for testing hydraulic valves, the hydraulic valve including a valve body and a valve sleeve, the test block structure including a test block, the end of the test block having a first groove, a boss extending outward from the bottom wall of the first groove, a first mounting hole having a first mounting hole having a first portion of the hydraulic valve engaging with the first mounting hole, and a plurality of fluid passage ports being provided on the side of the test block.

[0005] In some embodiments, the depth of the groove is not greater than the height of the boss.

[0006] In some embodiments, the cross-sectional area of ​​the boss is smaller than the cross-sectional area of ​​the valve body.

[0007] In some embodiments, the hydraulic valve further includes a locating pin disposed on the valve body, and a second groove is provided on the test block to accommodate the locating pin. The second groove extends from a position near the boss toward the edge of the test block, and the extension length of the second groove is greater than the diameter of the locating pin.

[0008] In some embodiments, the boss has a first guide portion to cooperate with a disassembly mechanism to remove the valve sleeve.

[0009] Another object of this disclosure is to provide a test fixture for a hydraulic valve, including the test block structure in some of the above embodiments. The test fixture further includes a fixed seat, a pressure cylinder, and a first driving member. The fixed seat is connected to one end of the test block, the pressure cylinder is disposed inside the fixed seat, and the first driving member is disposed at the end of the fixed seat away from the test block to drive the pressure cylinder to slide within the fixed seat.

[0010] In some embodiments, the test fixture further includes a limiting member, a first sliding groove is provided on the side of the fixed seat, a second sliding groove is provided on the side of the pressure cylinder corresponding to the first sliding groove, and the limiting member passes through the first sliding groove and the second sliding groove.

[0011] Another objective of this disclosure is to provide a disassembly fixture for a hydraulic valve, used for disassembling the valve sleeve of a hydraulic valve, including the test block structure in some of the above embodiments, wherein the boss has a first guide portion, and the disassembly fixture further includes a locking sleeve, wherein the locking sleeve is provided with a snap-fit ​​portion that cooperates with the valve sleeve and a second guide portion that cooperates with the first guide portion.

[0012] In some embodiments, the first guide portion and the second guide portion are inclined surfaces.

[0013] In some embodiments, the disassembly fixture further includes a second drive member and a second fastener, wherein the second drive member passes through the locking sleeve and is secured by the second fastener.

[0014] The test block structure provided in this embodiment has the following beneficial effects:

[0015] The test block has a first groove and a boss at its end, and a gap is formed between the first groove and the boss. When disassembling the valve body and valve sleeve of the hydraulic valve, the setting of this gap provides working space for the disassembly tool, making the disassembly work convenient.

[0016] When disassembling the valve body after hydraulic valve testing, the gap setting can solve the problem of difficulty in placing the disassembly tool due to the lack of space between the valve body end face and the test block. At the same time, the disassembly tool is disassembled along the gap, and the contact area between the disassembly tool and the valve body is small, resulting in less damage to the surface of the valve body.

[0017] When disassembling the valve sleeve, the boss and the locking sleeve work together to solve the problem of difficulty in placing the disassembly mechanism due to the small gap between the valve sleeve end face and the test block.

[0018] The hydraulic valve testing fixture provided in this disclosure has the following beneficial effects:

[0019] The first drive component indirectly contacts the hydraulic valve through a pressure cylinder. The hydraulic valve is enclosed inside the pressure cylinder, which protects the hydraulic valve and prevents friction damage, effectively improving the product's appearance integrity and the safety and reliability of the testing process.

[0020] The hydraulic valve disassembly fixture provided in this disclosure has the following beneficial effects:

[0021] The locking sleeve covers the outer circumference of the valve sleeve, and the boss on the test block makes the valve sleeve end face bear force on the entire circumference, avoiding damage to the valve sleeve due to disassembly. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the hydraulic valve in the embodiments of this disclosure;

[0024] Figure 2 This is a schematic diagram of the test block structure of the hydraulic valve in an embodiment of this disclosure;

[0025] Figure 3 This is a schematic diagram of the structure of the test fixture for the hydraulic valve in the embodiments of this disclosure;

[0026] Figure 4 This is a cross-sectional view of the test fixture for the hydraulic valve in the embodiments of this disclosure;

[0027] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0028] Figure 6 This is a perspective view of the test block structure of the hydraulic valve in an embodiment of this disclosure;

[0029] Figure 7 This is a schematic diagram showing the usage state of the disassembly tooling for the hydraulic valve in the embodiments of this disclosure;

[0030] Figure 8 yes Figure 7 A magnified view of a portion of the image.

[0031] Figure label:

[0032] 1. Test block; 11. First groove; 111. Bolt hole; 12. Boss; 121. First guide part; 13. First mounting hole; 14. Sealing sleeve; 141. Second through hole; 15. First sliding groove; 16. Second sliding groove; 17. Second groove; 18. First liquid outlet; 19. Second liquid outlet; 2. Fixing seat; 3. Pressure cylinder; 4. First driving component; 5. Limiting component; 6. Gap; 7. Locking sleeve; 71. Second mounting hole; 72. Snap-fit ​​part; 73. Second guide part; 8. Second driving component; 9. Second fastener; 100. High-speed switching valve; 101. Valve body; 102. Valve sleeve; 103. First through hole; 104. Positioning pin; 105. Step part; 106. Ball; 107. Filter element. Detailed Implementation

[0033] Various embodiments and features of this disclosure are described herein with reference to the accompanying drawings.

[0034] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.

[0035] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0036] These and other features of this disclosure will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0037] It should also be understood that although this disclosure has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this disclosure, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0038] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0039] Specific embodiments of this disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this disclosure, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure this disclosure. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use this disclosure in a variety of substantially any suitable detailed structures.

[0040] The first embodiment of this disclosure provides a test fixture for a hydraulic valve, using a high-speed switching valve 100 as an example (the structure of the high-speed switching valve is consistent with Chinese patent CN215673845U, entitled "A Miniature Low-Power Solenoid Valve"). Figure 1 As shown, the high-speed switching valve 100 includes a valve body 101, a valve sleeve 102, and a sealing sleeve 14. One end of the valve sleeve 102 is connected to the valve body 101, and the other end of the valve sleeve 102 is located outside the valve body 101. A filter element 107 is provided at the end of the valve sleeve 102. A first through hole 103 is provided on the outer periphery of the valve sleeve 102. A cavity is provided inside the valve sleeve 102, and a ball 106 is provided inside the cavity. In the initial state, the ball 106 is restrained inside the valve sleeve 102 by the action of a spring. The sealing sleeve 14 is located on the outside of the valve sleeve 102, and a positioning pin 104 is provided at the end of the valve body 101. The test fixture includes a test block structure. The high-speed switching valve 100 is installed on the test block 1 of the test block structure for testing. After the test, the high-speed switching valve 100 is removed from the test block 1.

[0041] Among them, such as Figures 2-6 As shown, a first groove 11 is provided at the end of the test block 1, and a boss 12 extends outward from the bottom wall of the first groove 11. A first mounting hole 13 is provided on the boss 12. Before the test, the sealing sleeve 14 is installed into the first mounting hole 13, and then the high-speed switching valve 100 is installed onto the test block 1. Specifically, the valve sleeve 102 is inserted into the sealing sleeve 14, the valve body 101 is in contact with the boss 12, and the positioning pin 104 extends into the test block 1 to position the high-speed switching valve 100.

[0042] The testing fixture for the hydraulic valve also includes a fixed base 2, a pressure cylinder 3, and a first driving member 4. The fixed base 2 is connected to one end of the test block 1 with a boss 12. The pressure cylinder 3 is disposed inside the fixed base 2, and the valve body 101 of the high-speed switching valve 100 is disposed inside the pressure cylinder 3. The first driving member 4 is disposed at the end of the fixed base 2 away from the test block 1 to drive the pressure cylinder 3 to slide within the fixed base 2. During the test, the first driving member 4 drives the pressure cylinder 3 to move downward, causing the valve sleeve 102 to undergo axial displacement within the test block 1. A radial expansion clamping force is generated between the valve sleeve 102, the sealing sleeve 14, and the first mounting hole 13, forming a sealing structure. In this embodiment, the first driving component 4 indirectly contacts the high-speed switching valve 100 through the pressure cylinder 3, rather than directly contacting it. The pressure cylinder 3 serves to protect the high-speed switching valve 100, enclosing it within the pressure cylinder 3. This prevents the first driving component 4 from directly contacting the high-speed switching valve 100 and causing it to move downwards, which could scratch the outer surface of the valve and distort the test performance results. This effectively improves the integrity of the product's appearance and the safety and reliability of the testing process. Here, the first driving component 4 is a nut, which is threadedly connected to the fixed base 2. Tightening the nut allows the high-speed switching valve 100 to move downwards, ensuring the smooth operation of the valve.

[0043] Furthermore, the test block 1 has first sliding grooves 15 on both sides, and the pressure cylinder 3 has second sliding grooves 16 corresponding to the first sliding grooves 15. The limiting member 5 passes through both first sliding grooves 15 (and also through both second sliding grooves 16). When the first driving member 4 drives the pressure cylinder 3 to move, the pressure cylinder 3 can only move vertically and cannot rotate. Therefore, the force applied to the pressure cylinder 3 by the first driving member 4 is borne by the limiting member 5. That is, the limiting member 5 replaces the positioning pin 104 in bearing the resulting torque, thereby reducing damage to the positioning pin 104. Here, the limiting member 5 is a cylindrical rod-shaped structure. The first sliding groove 15 and the second sliding groove 16 are set as waist-shaped grooves. The limiting member 5 cooperates with the first sliding groove 15 and the second sliding groove 16, which helps to ensure the smoothness of the driving operation of the limiting member 5. In this way, the high-speed switching valve 100 is only subjected to pressure during installation and is not subjected to shearing force generated by the rotation of the thread. There is no force on the positioning pin 104 on the high-speed switching valve 100, which protects the valve body 101 of the high-speed switching valve 100 from damage and solves the problems of unqualified position, loosening, and falling off of the positioning pin 104 after the test.

[0044] In the prior art, to ensure the positioning effect of the positioning pin 104, a positioning hole matching the size of the positioning pin 104 is provided on the test block 1. However, the above method requires continuous adjustment of the position of the high-speed switching valve 100 when it is installed on the test block 1 to align the positioning pin 104 with the positioning hole. In this embodiment, when installing the high-speed switching valve 100, a second groove 17 for accommodating the positioning pin 104 is provided on the test block 1. The second groove 17 extends from a position near the boss 12 toward the edge of the test block 1, and the extension length of the second groove 17 is greater than the diameter of the positioning pin 104. In this way, during the installation of the high-speed switching valve 100 on the test block 1, the positioning pin 104 extends into the second groove 17. Since the extension length of the second groove 17 is greater than the diameter of the positioning pin 104, the positioning pin 104 can automatically engage with the second groove 17, realizing the rapid installation of the positioning pin 104 and the second groove 17 without the need for multiple adjustments. The size of the second groove 17 is limited by the size of the positioning pin 104. That is, the outer wall of the positioning pin 104 needs to contact the groove wall of the second groove 17 to ensure that the positioning pin 104 can position the high-speed switching valve 100 during the test.

[0045] Furthermore, a first liquid inlet 18 and a second liquid inlet 19 are respectively provided on both sides of the test block 1. The first liquid inlet 18 and the second liquid inlet 19 are arranged sequentially along the height direction of the test block 1. For example, the first liquid inlet 18 is located at the lower part of the test block 1, and the second liquid inlet 19 is located at the upper part of the test block 1. The first liquid inlet 18 is connected to the first mounting hole 13 through a first flow channel, and the second liquid inlet 19 is connected to the first mounting hole 13 through a second flow channel. During product testing (e.g., sealing performance testing), oil is introduced into the first liquid inlet 18. The oil enters the first mounting hole 13 along the first flow channel. If oil is detected from the second liquid inlet 19 and the second flow channel, or if oil seeps out from the upper surface of the boss 12, it indicates that the sealing performance at one of the following locations is unqualified: between the valve body 101 and the sealing sleeve 14, or at the steel ball inside the valve body 101.

[0046] In this embodiment, after the test, the valve body removal tool of the high-speed switching valve 100 approaches the valve body 101 through the gap 6 formed between the boss 12 and the test block 1, and acts on the side of the valve body 101 that mates with the valve sleeve 102 to remove the valve body 101. Compared with the high-speed switching valve 100 where the valve body 101 is in direct contact with the test block 1 without gap 6, removing the valve body 101 is more convenient. The interaction surface between the removal tool and the valve body 101 is smaller, resulting in less damage to the surface of the valve body 101. The cross-sectional area of ​​the boss 12 is smaller than that of the valve body 101 of the hydraulic valve, meaning that the valve body 101 of the high-speed switching valve 100 is not entirely in contact with the upper surface of the test block 1. Instead, part of its area is in contact with the test block 1 at the boss 12, while another part is suspended above the test block 1. This provides more working space for the removal tool when removing the valve body 101 of the high-speed switching valve 100, making the operation more convenient. The height of the boss 12 here is not lower than the height of the upper plane of the test block 1. The gap 6 is formed on the upper surface of the test block 1 to facilitate the operation of the removal tool.

[0047] Furthermore, since the valve sleeve 102 of the high-speed switching valve needs to be pressed into the sealing sleeve 14 during the test, if the height of the boss 12 is set too large, the stability of the high-speed switching valve 100 when moving towards the test block 1 will be affected, and the high-speed switching valve 100 may sway left and right. Therefore, in this embodiment, the height of the boss 12 is set to be small (e.g., 0.5-1cm), and a first groove 11 is provided on the test block 1. The bottom wall of the boss 12 and the first groove 11 together provide working space for the demolition tool, ensuring the stable operation of the high-speed switching valve 100 while providing sufficient working space for the demolition tool.

[0048] The method of using the test fixture for the hydraulic valve in this embodiment is as follows:

[0049] S1: The pressure cylinder 3 is installed inside the fixed base 2, the first driving member 4 is installed at the end of the fixed base 2, and the limiting member 5 is installed on the fixed base 2 and the pressure cylinder 3 after passing through the first sliding groove 15 and the second sliding groove 16.

[0050] S2: Install a sealing sleeve 14 in the first mounting hole 13 of the test block 1, and connect the first through hole 103 (liquid inlet hole) on the outer periphery of the sealing sleeve 14, the second through hole 141 on the outer periphery of the sealing sleeve 14, and the second liquid outlet 19.

[0051] S3: The high-speed switching valve 100 is installed onto the pressure cylinder 3, and then the fixing seat 2 is installed onto the test block 1 through the first fastener (the bolt hole 111 installed on the test block 1);

[0052] S4: The first driving member 4 drives the pressure cylinder 3 to move towards the test block 1, the first driving member 4 drives the pressure cylinder 3 to move downward, the valve sleeve 102 generates axial displacement in the test block 1, and a radial expansion clamping force is generated between the valve sleeve 102, the sealing sleeve 14 and the first mounting hole 13, forming a sealing structure between the valve sleeve 102 and the sealing sleeve 14.

[0053] S5: Introduce oil into the first liquid outlet 18 and observe the leakage at the second liquid outlet 19 and the boss 12.

[0054] The second embodiment of this disclosure provides a disassembly fixture for a hydraulic valve. Taking a high-speed switching valve 100 as an example, during product testing (e.g., sealing performance testing), a sealing sleeve 14 is installed into the first mounting hole 13, and then the high-speed switching valve 100 is installed onto the test block 1. Specifically, the valve sleeve 102 is inserted into the sealing sleeve 14, the valve body 101 is in contact with the boss 12, and the positioning pin 104 extends into the test block 1 to position the high-speed switching valve 100. The valve body 101, valve sleeve 102, and sealing sleeve 103 are not fixedly connected together. After the product test is completed and the valve body 101 is removed, the valve sleeve 102 needs to be removed separately from the boss 12 of the test block 1 using the hydraulic valve disassembly fixture.

[0055] Among them, such as Figure 7 and Figure 8 As shown, the disassembly fixture includes a test block 1, a locking sleeve 7, a second driving member 8, and a second fastener 9. The test block 1 has a first groove 11 at its end, and a boss 12 extends outward from the bottom of the first groove 11, with a first mounting hole 13 on the boss 12. Two locking sleeves 7 are provided, interlocking to surround the valve sleeve 102. Each locking sleeve 7 has a second mounting hole 71. The second driving member 8 passes through the two second mounting holes 71 and is then fixed to the valve sleeve 102 by the second fastener 9. The second driving member 8 is a driving rod; after passing through the two locking sleeves 7, lifting the second driving member 8 upwards pulls the valve sleeve 102 out of the test block 1 of the test fixture, saving time and effort and providing convenience. Furthermore, the locking sleeve 7 has a mounting surface for installing the second fastener 9. Placing the second fastener 9 on the mounting surface ensures reliable connection between the second fastener 9, the locking sleeve 7, and the second driving member 8.

[0056] Furthermore, each locking sleeve 7 is provided with a snap-fit ​​portion 72, and the valve sleeve 102 has a stepped portion 105. The snap-fit ​​portion 72 cooperates with the stepped portion 105 of the hydraulic valve sleeve 102. When disassembling the valve sleeve 102, the snap-fit ​​portion 72 cooperates with the stepped portion 105, and the snap-fit ​​portion 72 moves upward, causing the valve sleeve 102 to move out from the first mounting hole 13. In this embodiment, the snap-fit ​​portion 72 and the stepped portion 105 are designed to cooperate with each other, resulting in a small contact area between the locking sleeve 7 and the valve sleeve 102, which makes it less likely to damage the outer surface of the valve sleeve 102.

[0057] Furthermore, the boss 12 has a first guide portion 121 that cooperates with the disassembly mechanism, and the locking sleeve 7 has a second guide portion 73 that cooperates with the first guide portion 121. Here, the first guide portion 121 is a first inclined surface, and the second guide portion 73 is a second inclined surface. The first inclined surface is arranged from bottom to top, and the second inclined surface is arranged from top to bottom. When installing the locking sleeve 7, the first and second inclined surfaces can be gradually wedged together, improving the reliability of the fit. They can also serve as guides when installing the locking sleeve 7.

[0058] The method for using the disassembly fixture for the hydraulic valve in this embodiment is as follows:

[0059] S11: The snap-fit ​​portion 72 of the locking sleeve 7 mates with the stepped portion 105 of the valve sleeve 102, and the first guide portion 121 and the second guide portion 73 cooperate with each other to install the locking sleeve 7 on the outside of the valve sleeve 102.

[0060] S12: Pass the second drive component 8 through the locking sleeve 7 and fix it with the second fastener 9;

[0061] S13: The second drive member 8 is lifted upward to move the valve sleeve 102 out of the boss 12 of the test block 1.

[0062] The third embodiment of this disclosure provides a test block structure for testing hydraulic valves (e.g., sealing performance testing of a high-speed switching valve 100 and disassembly of the high-speed switching valve 100), such as... Figures 1-6 As shown, the test block structure includes a test block 1. A first groove 11 is provided at the end of the test block 1. A boss 12 extends outward from the bottom wall of the first groove 11. A first mounting hole 13 is provided on the boss 12. A first liquid outlet 18 and a second liquid outlet 19 are provided on the side of the test block 1. The first liquid outlet 18 and the second liquid outlet 19 are respectively connected to the first mounting hole 13 to provide a flow path for the oil used in the sealing performance test.

[0063] The test block 1 is provided with a second groove 17 to accommodate the positioning pin 104 of the hydraulic valve. The second groove 17 extends from a position near the boss 12 toward the edge of the test block 1, and the extension length of the second groove 17 is greater than the diameter of the positioning pin 104. This allows the positioning pin 104 to automatically engage with the second groove 17, enabling quick installation of the positioning pin 104 without the need for multiple adjustments.

[0064] The test block 1 has a first groove 11 at its end, and a boss 12 extends outward from the bottom of the first groove 11. A gap 6 is formed between the boss 12 and the test block 1. The gap 6 provides working space for the tools for removing the valve body 101 and the valve sleeve 102 of the high-speed switching valve 100 after the test. The gap 6 makes the contact area between the removal tool and the valve body 101 (or valve sleeve 102) smaller during disassembly, making it less likely to scratch the surface of the valve body 101 (or valve sleeve 102).

[0065] The following explanation will be based on disassembling the valve body 101 of the high-speed switching valve 100 as an example:

[0066] After the performance test of the high-speed switching valve 100, when it needs to be removed from the boss 12, a gap 6 is formed between the boss 12 and the bottom wall of the first groove 11. The removal tool approaches the valve body 101 from the gap 6, acting on the side of the valve body 101 that mates with the valve sleeve 102, and removes the valve body 101. This makes disassembling the valve body 101 more convenient, as the interaction area between the removal tool and the valve body 101 is small, resulting in less damage to the surface of the valve body 101. The cross-sectional area of ​​the boss 12 is smaller than that of the valve body 101 of the hydraulic valve, meaning that the valve body 101 of the high-speed switching valve 100 is not entirely in contact with the upper surface of the test block 1. Instead, part of its area is in contact with the test block 1 at the boss 12, while another part is suspended above the test block 1. This provides sufficient working space for the removal tool when disassembling the valve body 101 of the high-speed switching valve 100, making the operation more convenient. The height of the boss 12 here is not lower than the height of the upper surface of the test block 1. The gap 6 is formed on the upper surface of the test block 1 to facilitate the operation of the removal tool.

[0067] The following explanation will be based on the example of disassembling the valve sleeve 102 of the high-speed switching valve 100:

[0068] After the performance test of the high-speed switching valve 100 is carried out, the valve body 101 is removed. Since the valve body 101 and the valve sleeve 102 are not fixedly connected during the product testing stage (e.g., sealing performance test), the valve sleeve 102 needs to be removed separately.

[0069] The boss 12 has a first guide portion 121 that cooperates with the disassembly mechanism, and the locking sleeve 7 has a second guide portion 73 that cooperates with the first guide portion 121. Here, the first guide portion 121 is a first inclined surface, and the second guide portion 73 is a second inclined surface. The first inclined surface is arranged from bottom to top, and the second inclined surface is arranged from top to bottom. When installing the locking sleeve 7, the first and second inclined surfaces can be gradually wedged together to improve the reliability of the fit. At the same time, since the distance between the end face of the valve sleeve 102 and the end face of the boss 12 is small, the first and second inclined surfaces can play a guiding role.

[0070] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0071] In the description of this disclosure, "first feature" and "second feature" may include one or more of the features.

[0072] In the description of this disclosure, "multiple" means two or more.

[0073] In the description of this disclosure, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0074] In the description of this disclosure, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0075] In the description of this disclosure, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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 this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A testing fixture for a hydraulic valve, characterized in that, The test block structure is used for testing hydraulic valves. The hydraulic valve includes a valve body and a valve sleeve. The test block structure includes a test block. A first groove is formed at the end of the test block. A boss extends outward from the bottom wall of the first groove. A first mounting hole is formed on the boss. At least a portion of the hydraulic valve mates with the first mounting hole. Multiple fluid passages are provided on the side of the test block. A gap is formed between the first groove and the boss. The test fixture also includes a fixed base, a pressure cylinder, and a first driving component. The fixed base is connected to one end of the test block. The valve body is disposed inside the pressure cylinder, and the pressure cylinder is disposed inside the fixed base. The first driving component is disposed at the end of the fixed base away from the test block to drive the pressure cylinder to slide within the fixed base.

2. The test fixture for the hydraulic valve according to claim 1, characterized in that, The depth of the first groove is not greater than the height of the boss.

3. The test fixture for the hydraulic valve according to claim 1, characterized in that, The cross-sectional area of ​​the boss is smaller than the cross-sectional area of ​​the valve body.

4. The test fixture for the hydraulic valve according to claim 1, characterized in that, The hydraulic valve further includes a positioning pin disposed on the valve body, and a second groove is provided on the test block to accommodate the positioning pin. The second groove extends from a position near the boss toward the edge of the test block, and the extension length of the second groove is greater than the diameter of the positioning pin.

5. The test fixture for the hydraulic valve according to claim 1, characterized in that, The boss has a first guide portion for cooperating with the disassembly mechanism to remove the valve sleeve.

6. The test fixture for the hydraulic valve according to claim 1, characterized in that, The test fixture also includes a limiting member. The side of the fixed seat is provided with a first sliding groove, and the side of the pressure cylinder is provided with a second sliding groove corresponding to the first sliding groove. The limiting member passes through the first sliding groove and the second sliding groove.

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