A cvt valve core hole detection positioning tool

Abstract

The utility model provides a kind of CVT valve body valve core hole detection positioning tool, it is related to valve core hole detection technical field, including support plate, its top is provided with the limiting structure for accommodating and limiting the position of the valve body to be detected;Guide sleeve plate, it is symmetrically installed in the both sides of support plate, and guide sleeve plate is opened with guide hole;Vertical plate, it is detachably connected to one end of support plate top;Fixed plate, it is detachably connected to the both sides of vertical plate;And positioning mechanism, it is detachably installed on the fixed plate of the side towards valve body, for the valve body placed in limiting structure is compressed positioning, to solve the current lack of with CVT valve body special matching positioning tool, mostly rely on operator manually inserts detection head into valve hole, the relative position of its axis and valve hole theoretical axis cannot be guaranteed, and when needing to measure multiple different valve core holes on valve body, need to repeatedly move and re-chuck valve body technical problem.

Description

Technical Field

[0001] This utility model mainly relates to the field of valve core hole detection technology, specifically to a CVT valve body valve core hole detection and positioning fixture. Background Technology

[0002] The valve body of a CVT (Continuously Variable Transmission) is a core component of the hydraulic control system, containing multiple high-precision valve core bores. The diameter, roundness, and especially the coaxiality between these bores directly affect the smoothness of the valve core movement and the accuracy of hydraulic control, thus having a decisive impact on the overall performance and reliability of the transmission. Therefore, precise inspection of the valve core bores is a crucial quality control step during valve body manufacturing.

[0003] Currently, the main technical challenges encountered in the inspection of CVT valve body core holes are as follows: First, workpiece positioning and datum establishment are difficult. The CVT valve body has a complex structure and irregular shape, making it difficult to establish an efficient and accurate positioning datum when inspecting the valve core hole. Existing inspection methods often suffer from inaccurate workpiece clamping and positioning, leading to a misalignment between the inspection datum and the design datum, introducing significant systematic errors, poor inspection accuracy, and a high risk of misjudgment. Especially for the critical geometric tolerance of coaxiality, accurate measurement requires specialized, high-precision inspection fixtures.

[0004] Secondly, there is a lack of suitable tooling for efficient testing methods. While using a coordinate measuring machine (CMM) offers high accuracy, the process is cumbersome and time-consuming due to the need to measure multiple cross-sections of the valve core orifice, making it unsuitable for production schedules and resulting in high equipment investment and maintenance costs. Therefore, pneumatic measurement is widely used as an efficient testing method in production. This principle involves inserting a pneumatic probe into the valve orifice and using the pressure changes caused by variations in the gap between the measuring nozzle and the orifice wall to indirectly measure the orifice diameter and coaxiality. However, currently, there is a lack of dedicated positioning tooling for CVT valve bodies, and most operations rely on operators manually inserting the probe into the valve orifice. This manual operation method has obvious drawbacks: First, when the measuring head is inserted into the valve hole, the relative position of its axis with the theoretical axis of the valve hole cannot be guaranteed, resulting in uncontrollable random deviation. This leads to the loss of control over the initial clearance margin between the measuring head and the valve hole wall, which seriously affects the accuracy of the measurement results. Second, when multiple different valve core holes on the valve body need to be measured, the valve body needs to be moved and re-clamped repeatedly. This is not only inefficient, but the frequent handling can also cause bumps and damage to the precision valve body surface, resulting in secondary scrap.

[0005] It should be noted that the above content falls within the scope of technical knowledge of those skilled in the art. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0006] 1. The technical problem to be solved by the utility model: This utility model provides a CVT valve body valve core hole detection and positioning fixture to solve the technical problems existing in the background art.

[0007] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this utility model is as follows: a CVT valve body valve core hole detection and positioning fixture, including a support plate, the top of which is provided with a limiting structure for accommodating and limiting the position of the valve body to be detected; A guide sleeve is symmetrically installed on both sides of the support plate, and the guide sleeve is provided with guide holes for guiding the axial movement of the detection head; A vertical plate, which is detachably connected to one end of the top of the support plate; A fixing plate, which is detachably connected to both sides of the vertical plate; and A positioning mechanism, which is detachably mounted on the fixing plate facing the valve body, is used to press and position the valve body placed in the limiting structure.

[0008] Furthermore, the positioning mechanism employs a quick-grip clamp.

[0009] Furthermore, the limiting structure includes a leveling block, a limiting pin, and a guide pin fixedly installed on the top of the support plate; the leveling block is used to provide an installation reference plane for the valve body, the limiting pin cooperates with the positioning hole at the bottom of the valve body to achieve radial limiting, and the guide pin is used to provide guidance and initial positioning during the placement of the valve body.

[0010] Furthermore, a support block is detachably installed at one end of the bottom of the support plate, the bottom surface of the support block is parallel to the bottom surface of the fixed plate, and provides a stable horizontal support reference for the support plate; an auxiliary handle is also connected to the end of the support plate.

[0011] Furthermore, a first adjusting block is symmetrically installed at one end of the support plate, a second adjusting block is symmetrically installed at the bottom of the vertical plate, and a third adjusting block is symmetrically installed on both sides of the top of the fixed plate; the first adjusting block, the second adjusting block, and the third adjusting block together constitute an adjustable three-point support structure.

[0012] Furthermore, a horizontal bubble meter is symmetrically installed in the middle of the bottom surface of the support plate.

[0013] Furthermore, the support plate, vertical plate, and support block are provided with weight-reducing through holes.

[0014] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model features a reasonable design. By incorporating a limiting structure consisting of equal-height blocks, limit pins, and guide pins, combined with a quick-clamping positioning mechanism, it achieves rapid, accurate positioning and reliable clamping of the valve body, effectively avoiding manual positioning errors. The high-precision fit between the guide sleeve and the detection head ensures automatic alignment of the detection axis with the valve hole axis, fundamentally eliminating measurement errors caused by detection head misalignment and significantly improving the detection accuracy of hole diameter and coaxiality.

[0015] This fixture features a modular design, allowing for the inspection of multiple valve core holes in a single clamping operation. The auxiliary handle and flip design significantly improve inspection efficiency. A three-point adjustment mechanism and a level ensure the accuracy of the inspection benchmark, while the weight-reducing hole design enhances operability. The overall structure effectively avoids repeated handling and potential damage to the valve body during inspection, combining the advantages of high precision, high efficiency, and high reliability.

[0016] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the valve body after clamping according to the present invention; Figure 2 This is a schematic diagram of the detection head of this utility model during operation; Figure 3 This is a schematic diagram of the support plate structure of this utility model.

[0018] Figure label: 1. Support plate; 11. Equal height block; 12. Limit pin; 13. Guide pin; 14. Support block; 15. Auxiliary handle; 16. First adjusting block; 17. Horizontal bubble meter; 2. Guide sleeve plate; 3. Guide hole; 4. Vertical plate; 41. Second adjusting block; 5. Fixed plate; 51. Third adjusting block; 6. Positioning mechanism. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] It should be noted that the structures not described in this utility model do not involve the design points and improvement directions of this utility model, and can all adopt existing technologies known to those skilled in the art.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] See attached document Figure 1-3 A CVT valve body valve core hole detection and positioning fixture, including The support plate 1 has a limiting structure on its top for accommodating and defining the position of the valve body to be tested; Guide sleeve 2 is symmetrically installed on both sides of the support plate 1, and guide holes 3 are provided on the guide sleeve 2 for guiding the axial movement of the detection head; A vertical plate 4 is detachably connected to one end of the top of the support plate 1; A fixing plate 5, which is detachably connected to both sides of the vertical plate 4; and The positioning mechanism 6 is detachably mounted on the fixing plate 5 facing the valve body and is used to press and position the valve body placed in the limiting structure. In this embodiment, the support plate 1 serves as the base platform of the entire tooling, and its top is precisely machined with a limiting structure that matches the shape of the CVT valve body to be tested. This structure ensures that the valve body can be quickly and accurately positioned when placed.

[0026] Guide sleeves 2 are symmetrically installed on both sides of the support plate 1 by bolts. Each guide sleeve 2 is machined with high-precision guide holes 3. The inner diameter of these guide holes 3 is fitted with the outer diameter of the pneumatic measuring instrument detection head with a small clearance. Its function is to ensure that the detection head maintains a stable axial trajectory during insertion, thereby accurately aligning with the valve core holes on both sides of the valve body.

[0027] A vertical plate 4 is detachably connected to one end of the top of the support plate 1 by bolts. Both ends of the vertical plate 4 are also connected to fixing plates 5 by bolts. A positioning mechanism 6 is installed on the fixing plate 5 facing the side where the valve body is placed. After the valve body is placed on the limiting structure of the support plate 1, operating the positioning mechanism 6 applies a stable clamping force to the valve body from above or the side, achieving final precise positioning and clamping.

[0028] During operation, based on the position of the valve core hole on the valve body to be tested, the guide sleeve 2 of the corresponding specification is installed in the correct position on both sides of the support plate 1. Then, the CVT valve body is placed within the limiting structure of the support plate 1 to complete the initial positioning. Next, the positioning mechanism 6 is driven to reliably press and fix the valve body.

[0029] After clamping, the entire tool is placed in the testing position with the valve core hole to be tested facing vertically upwards. The operator inserts the testing head of the pneumatic measuring instrument into the guide hole 3 of the guide sleeve 2. Under the precise guidance of the guide hole 3, the testing head can automatically achieve coaxial alignment with the valve core hole on the valve body and smoothly insert into the hole for measurement. This process effectively avoids measurement errors caused by deviations that may occur due to direct manual insertion.

[0030] After the valve core hole on one side of the valve body has been inspected, the fixture can be flipped over to inspect the valve core hole on the other side. This design enables the valve body to complete multi-hole inspection in one clamping, which greatly improves inspection efficiency and consistency, and avoids potential damage to the valve body caused by repeated handling.

[0031] The positioning mechanism 6 employs a quick-release clamp. In this embodiment, please refer to the accompanying drawings. The quick-release clamp is existing technology and will not be described in detail here. It is used to quickly disassemble and position the valve body, effectively reducing auxiliary time and significantly improving the overall efficiency of the inspection operation. Simultaneously, this mechanical clamping method avoids the use of a complex power source, resulting in a simpler tooling structure, lower cost, and easier maintenance.

[0032] The limiting structure includes a leveling block 11, a limiting pin 12, and a guide pin 13 fixedly installed on the top of the support plate 1. The leveling block 11 provides a reference plane for the installation of the valve body. The limiting pin 12 cooperates with the positioning hole at the bottom of the valve body to achieve radial limiting. The guide pin 13 provides guidance and initial positioning during the placement of the valve body. In this embodiment, please refer to the accompanying drawings. Through the synergistic effect of the leveling block 11, the limiting pin 12, and the guide pin 13, rapid, accurate, and reliable three-dimensional positioning of the complex CVT valve body is achieved, laying a solid foundation for the subsequent high-precision pneumatic detection of the valve core hole.

[0033] A support block 14 is detachably mounted on one end of the bottom of the support plate 1. The bottom surface of the support block 14 is parallel to the bottom surface of the fixed plate 5, providing a stable horizontal support reference for the support plate 1. An auxiliary handle 15 is also connected to the end of the support plate 1. In this embodiment, the bottom surface of the support block 14 is at the same horizontal height and parallel to the bottom surface of the fixed plate 5 located at the other end of the support plate 1. This design enables the support plate 1, vertical plate 4, fixed plate 5, and support block 14 to form a stable "concave" shaped support structure. When the fixture is placed on the workbench, this structure provides a reliable horizontal support reference for the support plate 1, effectively preventing the fixture from shaking or tilting during valve body clamping, thereby ensuring that the valve body is always in a horizontal position for positioning and testing, greatly improving the convenience of operation and the repeatability of positioning.

[0034] In addition, an auxiliary handle 15 is fixedly installed at the end of the support plate 1. This handle provides the operator with a clear point of force application, making the moving and flipping of the tooling more labor-saving and safer.

[0035] A first adjusting block 16 is symmetrically installed at one end of the support plate 1, a second adjusting block 41 is symmetrically installed at the bottom of the vertical plate 4, and a third adjusting block 51 is symmetrically installed on both sides of the top of the fixed plate 5. The first adjusting block 16, the second adjusting block 41, and the third adjusting block 51 together constitute an adjustable three-point support structure. In this embodiment, three adjusting blocks are provided on each of the two sides of the support plate 1 to form a triangular positioning structure. When it is necessary to adjust the tooling horizontally, the side with the adjusting blocks can be placed on the workbench. By rotating these three adjusting blocks respectively, their extension length can be independently fine-tuned, thereby accurately adjusting the horizontal posture of the support plate 1 in space, which is convenient for subsequent pneumatic testing operations. The adjusting blocks are preferably adjusting bolts with locking function or precision pads.

[0036] A horizontal bubble meter 17 is symmetrically installed in the middle of the bottom surface of the support plate 1. In this embodiment, while adjusting the three adjustment blocks, the operator can observe the position of the bubble in the horizontal bubble meter 17 until the bubble is in the center, which indicates that the support plate 1 is in a precise horizontal state, further ensuring the accuracy and reliability of the pneumatic detection results of the valve core hole.

[0037] The support plate 1, vertical plate 4 and support block 14 are provided with weight-reducing through holes. In this embodiment, in order to effectively reduce the overall weight of the tooling and improve its portability while ensuring structural rigidity and strength, multiple weight-reducing through holes are reasonably arranged in the non-critical stress areas of the main body of the support plate 1, vertical plate 4 and support block 14.

[0038] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A CVT valve body valve core hole detection and positioning fixture, characterized in that: include The support plate (1) has a limiting structure on its top for accommodating and limiting the position of the valve body to be tested; Guide sleeve (2) is symmetrically installed on both sides of the support plate (1), and guide hole (3) is provided on the guide sleeve (2) for guiding the axial movement of the detection head. A vertical plate (4) is detachably connected to one end of the top of the support plate (1); A fixing plate (5) is detachably connected to both sides of the vertical plate (4); as well as The positioning mechanism (6) is detachably mounted on the fixing plate (5) facing the valve body and is used to press and position the valve body placed in the limiting structure.

2. The CVT valve body valve core hole detection and positioning fixture according to claim 1, characterized in that: The positioning mechanism (6) uses a quick clamp.

3. The CVT valve body valve core hole detection and positioning fixture according to claim 1, characterized in that: The limiting structure includes a leveling block (11), a limiting pin (12), and a guide pin (13) fixedly installed on the top of the support plate (1); the leveling block (11) is used to provide the mounting reference plane of the valve body, the limiting pin (12) cooperates with the positioning hole at the bottom of the valve body to achieve radial limiting, and the guide pin (13) is used to provide guidance and initial positioning during the placement of the valve body.

4. The CVT valve body valve core hole detection and positioning fixture according to claim 1, characterized in that: A support block (14) is detachably installed at one end of the bottom of the support plate (1). The bottom surface of the support block (14) is parallel to the bottom surface of the fixed plate (5) and provides a stable horizontal support reference for the support plate (1). An auxiliary handle (15) is also connected to the end of the support plate (1).

5. The CVT valve body valve core hole detection and positioning fixture according to claim 1, characterized in that: The support plate (1) is symmetrically equipped with a first adjusting block (16) at one end, the vertical plate (4) is symmetrically equipped with a second adjusting block (41) at the bottom, and the fixed plate (5) is symmetrically equipped with a third adjusting block (51) on both sides of the top. The first adjusting block (16), the second adjusting block (41) and the third adjusting block (51) together form an adjustable three-point support structure.

6. The CVT valve body valve core hole detection and positioning fixture according to claim 5, characterized in that: A horizontal bubble meter (17) is symmetrically installed in the middle of the bottom surface of the support plate (1).

7. The CVT valve body valve core hole detection and positioning fixture according to claim 3, characterized in that: The support plate (1), vertical plate (4) and support block (14) have weight-reducing through holes.

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