Gauge for measuring distance from center to end face of spring hole
By designing a fixture with limiting components and a linear detection light source, the problems of long detection time and large errors in the existing technology have been solved, realizing fast and accurate measurement of the distance from the center of the spring hole to the end face, thus improving detection efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU HAONENG TECH CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-15
AI Technical Summary
Existing technology cannot quickly and accurately measure the distance from the center line of the spring hole on the gear hub to the end face, resulting in long detection time and large errors.
A fixture comprising a limiting component and a linear detection light source was designed. Rapid detection is achieved through a positioning detection pin and a standard scale line. The light is emitted along the gear hub axis to measure the distance from the center of the spring hole to the end face. Accuracy is ensured by combining a base and a guide screw.
It enables rapid and accurate measurement of the distance from the center of the spring hole on the gear hub to the end face, improving detection efficiency, reducing errors, and simplifying the operation process.
Smart Images
Figure CN224247007U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gear processing technology, specifically, it is a gauge for measuring the distance from the center of a spring hole to the end face. Background Technology
[0002] Automotive transmissions include manual, automatic, and CVT types. In manual transmissions, the synchronizer assembly is a crucial component; it enables gear shifting from 1st to 2nd, 2nd to 3rd, and so on. The synchronizer assembly is composed of many parts, such as the gear hub, gear sleeve, and sliding sleeve. The gear hub is one type of component (e.g.,...). Figure 5 This component is not symmetrical; there is a distance requirement of 11±0.1 from the right side of the product to the center of the spring hole (e.g. Figure 2 ).
[0003] The distance to be measured is the distance from the centerline of the spring hole to the end face. Since the hole diameter is 5.7 mm and the depth is 37 mm, conventional measuring tools (such as vernier calipers) cannot be used. Measuring this distance requires coordinate measuring machine (CMM), which is time-consuming and the error increases due to multiple calculations. Therefore, there is currently a lack of a tool that can quickly and accurately measure the distance from the centerline of the spring hole to the end face on the gear hub. Utility Model Content
[0004] The purpose of this invention is to provide a gauge for measuring the distance from the center of a spring hole to the end face, thereby solving the problems of long detection time and large error in existing methods for measuring the distance from the center line of a spring hole on a gear hub to the end face.
[0005] This utility model is achieved through the following technical solution: a gauge for measuring the distance from the center of a spring hole to its end face, comprising:
[0006] A fixture is used to limit and inspect a gear hub. The fixture includes a limiting component and a linear detection light source. The limiting component includes a positioning detection pin and a positioning mounting block. The positioning detection pin is mounted on the positioning mounting block and has a standard scale line axially. When the linear detection light source is activated, it emits light. The width of the light along the axial direction of the gear hub is the tolerance value of the distance from the center of the spring hole on the gear hub to the end face. The diameter of the positioning detection pin is the same as the diameter of the hole on the gear hub.
[0007] A base for supporting a gear hub and a fixture, including a base on which the positioning mounting block is movably connected along the axial direction of the gear hub.
[0008] To better realize this utility model, a guide screw is further installed on the base, the guide screw is threadedly connected to the base, the guide screw is slidably connected to the positioning mounting block, the positioning mounting block is slidably connected to the base, and a spring is provided between the base and the positioning mounting block.
[0009] To better realize this utility model, the linear detection light source emitting end is further provided with an adjustment plate, and the adjustment plate is provided with holes. The light emitted by the linear detection light source passes through the holes in the adjustment plate and then illuminates the positioning detection pin. The adjustment plate is used to control the width of the light illuminating the positioning detection pin.
[0010] To better realize this utility model, the end of the positioning detection pin near the gear hub is a conical surface.
[0011] To better realize this utility model, a locking screw is further installed on the positioning mounting block, and the locking screw is used to lock the positioning detection pin.
[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0013] (1) By setting a limiting component and a linear detection light source, the present invention allows workers to quickly detect and judge the gear hub without having to use multiple tools for measurement; it greatly improves detection efficiency; and the method has smaller error and higher accuracy compared to using multiple tools for measurement. Attached Figure Description
[0014] Figure 1 This is a top view of the overall structure of this utility model.
[0015] Figure 2 This is a frontal sectional view of the overall structure of this utility model.
[0016] Figure 3 This is a schematic diagram of the detection area of a linear detection light source.
[0017] Figure 4 A cross-sectional view of the positioning mounting block and spring structure.
[0018] Figure 5 This is a schematic diagram of the gear hub structure.
[0019] Wherein: 2-Gear hub; 101-Base; 102-Positioning detection pin; 103-Positioning mounting block; 104-Locking screw; 105-Guide screw; 106-Linear detection light source; 107-Light beam; 108-Spring; 109-Standard scale line. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.
[0022] Example 1:
[0023] This embodiment provides a gauge for measuring the distance from the center of a spring hole to its end face, specifically as follows: Figure 1 , Figure 3 , Figure 5 As shown, it includes:
[0024] A fixture is used to limit and inspect the gear hub 2. The fixture includes a limiting component and a linear detection light source 106. The limiting component includes a positioning detection pin 102 and a positioning mounting block 103. The positioning detection pin 102 is mounted on the positioning mounting block 103. The positioning detection pin 102 has a standard scale line 109 axially provided. The length of the positioning detection pin 102 is greater than the hole depth on the gear hub 2. When the linear detection light source 106 is activated, it emits a light beam 107. The width of the light beam 107 along the axial direction of the gear hub 2 is the tolerance value of the distance from the center of the spring hole on the gear hub 2 to the end face. In this embodiment, the distance from the center of the spring hole on the gear hub 2 to the end face is required to be 11±0.1, so the width of the light beam 107 is 0.2. The diameter of the positioning detection pin 102 is the same as the hole diameter on the gear hub 2, ensuring that the positioning detection pin 102 fits completely against the hole wall after being inserted into the hole on the gear hub 2.
[0025] The base, used to support the gear hub 2 and the fixture, includes a base 101, and the positioning mounting block 103 is movably connected to the base 101 along the axial direction of the gear hub 2. All length and width dimensions mentioned herein are in mm.
[0026] During actual testing, the staff first distinguishes the front and back of the gear hub 2, then places the gear hub 2 on the base 101, and activates the linear detection light source 106, so that the light 107 illuminates the positioning detection pin 102. The light 107 is evenly divided into two parts by the standard scale line 109, that is, the length of the light 107 from the standard scale line 109 on both sides is 0.1. At this time, the distance from the center of 107 to the upper surface of 101 is 11. Then, the gear hub 2 is linearly pushed so that the positioning detection pin 102 is inserted into the gear hub 2. If there is a deviation in the hole position, the positioning detection pin 102 will move slightly longitudinally. After the positioning detection pin 102 is fully inserted into the spring hole on the gear hub 2, the position of the positioning detection pin 102 is completely stable. At this time, it can be observed manually whether the light 107 still coincides with the standard scale line 109. If the standard scale line 109 is still within the area of the light 107, then the gear hub 2 is judged to meet the standard. If the standard scale line 109 has left the area of the light 107, then the gear hub 2 is judged to be unqualified.
[0027] With this setup, staff can quickly inspect and assess the gear hub 2 without using multiple tools for measurement, significantly improving inspection efficiency. Furthermore, this method has smaller errors and higher accuracy compared to using multiple tools for measurement.
[0028] In another specific embodiment, a visual inspection device can also be installed on the base 101. This device is a purchased product. It is used to capture images of the area where the light 107 shines on the positioning detection pin 102 and automatically make judgments. If the target is met, a target signal is sent, such as a green light; if the target is not met, a target signal is sent, such as a red light. The staff only needs to make judgments based on the signals sent by the device, which reduces misjudgments caused by human observation errors and improves the success rate of detection.
[0029] Example 2:
[0030] This embodiment further extends the above embodiment, specifically as follows: Figure 2 , Figure 4 As shown, a guide screw 105 is installed on the base 101. The guide screw 105 is threadedly connected to the base 101 and slidably connected to the positioning mounting block 103. The positioning mounting block 103 is slidably connected to the base 101, and a spring 108 is provided between the base 101 and the positioning mounting block 103. The guide screw 105 guides and limits the positioning mounting block 103, allowing it to move only longitudinally. The spring 108 ensures the initial position of the positioning detection pin 102, ensuring that the standard scale line 109 is at a height of 11 from the upper surface of the base 101 in the initial state.
[0031] Furthermore, the emitting end of the linear detection light source 106 is provided with an adjustment plate, which has holes. The light 107 emitted by the linear detection light source 106 passes through the holes in the adjustment plate before illuminating the positioning detection pin 102. The adjustment plate is used to control the width of the light 107 illuminating the positioning detection pin 102. By providing the adjustment plate, the width of the light 107 can be adjusted, thus improving its applicability for detecting gear hubs 2 of other specifications.
[0032] Furthermore, the end of the positioning detection pin 102 near the gear hub 2 is a conical surface. The conical surface is designed to prevent the positioning detection pin 102 from rigidly colliding with the gear hub 2 due to hole misalignment, thus preventing it from being inserted into the spring hole. With the conical surface, when the positioning detection pin 102 approaches the spring hole, even if there is a misalignment in the spring hole, the spring 108 will deform after the conical surface contacts it, and the positioning detection pin 102 will automatically slide into the hole, ensuring smooth detection.
[0033] Furthermore, a locking screw 104 is installed on the positioning mounting block 103, which is used to lock the positioning detection pin 102. The positioning detection pin 102 is designed to be removable so that after long-term use, the positioning detection pin 102 may be bent or deformed; the positioning detection pin 102 can be easily replaced by removing the locking screw 104.
[0034] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.
[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A gauge for measuring the distance from the center of a spring hole to its end face, characterized in that, include: A fixture is used to limit and inspect the gear hub (2). The fixture includes a limiting component and a linear detection light source (106). The limiting component includes a positioning detection pin (102) and a positioning mounting block (103). The positioning detection pin (102) is mounted on the positioning mounting block (103). The positioning detection pin (102) has a standard scale line (109) axially arranged on it. When the linear detection light source (106) is activated, it emits a light beam (107). The width of the light beam (107) along the axial direction of the gear hub (2) is the tolerance value of the distance from the center of the spring hole on the gear hub (2) to the end face. The diameter of the positioning detection pin (102) is the same as the diameter of the hole on the gear hub (2). The base, for supporting the gear hub (2) and the gauge, includes a base (101), and the positioning mounting block (103) is movably connected to the base (101) along the axial direction of the gear hub (2).
2. The gauge for measuring the distance from the center of a spring hole to its end face according to claim 1, characterized in that: A guide screw (105) is installed on the base (101). The guide screw (105) is threadedly connected to the base (101). The guide screw (105) is slidably connected to the positioning mounting block (103). The positioning mounting block (103) is slidably connected to the base (101). A spring (108) is provided between the base (101) and the positioning mounting block (103).
3. The gauge for measuring the distance from the center of a spring hole to its end face according to claim 1, characterized in that: The linear detection light source (106) is provided with an adjustment plate at its emitting end. The adjustment plate has holes. The light (107) emitted by the linear detection light source (106) passes through the holes in the adjustment plate and then shines on the positioning detection pin (102). The adjustment plate is used to control the width of the light (107) shining on the positioning detection pin (102).
4. A gauge for measuring the distance from the center of a spring hole to its end face according to any one of claims 1-3, characterized in that: The end of the positioning detection pin (102) near the gear hub (2) is a conical surface.
5. A gauge for measuring the distance from the center of a spring hole to its end face according to any one of claims 1-3, characterized in that: A locking screw (104) is installed on the positioning mounting block (103), and the locking screw (104) is used to lock the positioning detection pin (102).