Synchronizer hub position gauge

Abstract

The utility model relates to the technical fields of synchronizer gear hub detection device, specifically is synchronizer gear hub position degree testing fixture, including the locating disc, the limiting assembly fixed on the locating disc, the expansion assembly fixed in the locating disc bottom and the detection assembly for detecting the position degree of gear hub sliding slot, limiting assembly is used for the initial positioning to gear hub, detection assembly includes annular ring and the multiple detection arms fixed below annular ring, and detection arm is used for detecting the position degree of sliding slot on gear hub periphery, expansion assembly includes the cylinder in the center of locating disc bottom, the pull rod of piston rod end portion fixed in the cylinder and the expansion sleeve fixed in the center of locating disc top, and the pull rod is located in the middle hole of expansion sleeve, this scheme can realize the positioning to gear hub quickly, and can complete the position degree detection of sliding slot on gear hub quickly, improves the detection efficiency and detection accuracy greatly, guarantees the accuracy of detection result.

Description

Technical Field

[0001] This utility model relates to the technical field of synchronizer hub detection device, specifically a synchronizer hub position gauge. Background Technology

[0002] The synchronizer hub is the "skeleton component" of the synchronizer assembly in an automotive transmission, primarily used in the shifting system of manual transmissions or dual-clutch automatic transmissions. Its core function is to act as a power transmission intermediary and guide synchronized movements. The inner bore is rigidly connected to the transmission output shaft via splines; the outer circle and annular groove are used to install components such as the synchronizer ring, slider, and return spring. During shifting, the hub moves axially under the push of the shift fork, causing the synchronizer ring to rub synchronously with the gear to be engaged, ultimately achieving smooth shifting.

[0003] The outer circular structure of the synchronizer hub has annularly arranged axial grooves. These grooves guide the sliders in the synchronizer component during axial movement. If the positional accuracy of the grooves is insufficient, the sliders may not assemble correctly. Therefore, these features need to be strictly controlled during the machining of the synchronizer hub. Furthermore, the positional accuracy of the grooves must be checked during the finished product inspection process. This inspection requires specialized testing tools, such as the existing technology "Synchronizer Hub Three-Groove Positional Comprehensive Inspection Fixture" (Publication No.: CN201583217U). This fixture uses three radial detection shafts arranged circumferentially. By pushing these three shafts, the position of the three grooves is determined based on whether the ends of the detection shafts can be inserted into the three slider grooves of the hub. However, this existing technology has the following technical problems: 1. When inspecting the grooves on a gear hub, the existing inspection fixtures require pushing each inspection shaft into the groove of the gear hub one by one. This involves many steps and low inspection efficiency. In addition, some gear hubs have a large number of grooves. Using the existing technology would require setting more inspection shafts, which would not only increase the number of steps but also increase the manufacturing cost of the inspection fixture.

[0004] 2. Existing inspection fixtures use a positioning mandrel to position the hub from the center. Simultaneously, a spring-loaded positioning pin is inserted into the tooth groove on the outer circumference of the hub. The spring force prevents the positioning pin from rotating circumferentially, thus reducing inspection accuracy. However, due to the clearance between the tooth groove and the positioning pin, and the installation allowance between the positioning pin and its support, the hub still has room to rotate circumferentially. During the insertion of the inspection shaft into the groove, it is easy for the inspection shaft to touch the inner wall of the groove, causing circumferential rotation of the hub. This allows all inspection shafts to be forcibly inserted into the groove, leading to misjudgments and insufficient inspection accuracy. Utility Model Content

[0005] This utility model provides a synchronizer hub position gauge, which can solve the problems of low detection efficiency and insufficient detection accuracy of existing gauges when detecting the position of the groove on the hub.

[0006] This application provides the following technical solution: a synchronizer gear hub position gauge, including a positioning plate, a limiting component fixed on the positioning plate, a tightening component fixed to the bottom of the positioning plate, and a detection component for detecting the position of the gear hub slide groove; the limiting component is used for initial positioning of the gear hub; The detection assembly includes an annular ring and multiple detection arms fixed below the annular ring. The detection arms are used to detect the position of the groove on the outer periphery of the gear hub. The expansion assembly includes a cylinder located at the bottom center of the positioning plate, a pull rod fixed to the end of the piston rod of the cylinder, and an expansion sleeve fixed at the top center of the positioning plate, with the pull rod located inside the central hole of the expansion sleeve.

[0007] Beneficial effects: 1. The detection component structure in this solution integrates all detection arms onto a ring. When detecting the grooves on the outer circumference of the gear hub, all detection arms on the ring can be directly aligned with the grooves on the gear hub. From the top of the gear hub along the axial direction, each detection arm is inserted into the corresponding groove, thereby completing the positional detection of all grooves at once. Compared with the existing technology that requires pushing the detection pins into the grooves one by one, this solution can effectively reduce the detection steps and greatly improve the detection efficiency.

[0008] 2. Improve the positioning stability of the gear hub, thereby improving the detection accuracy. This solution uses a limiting component to initially position the gear hub, and then uses the cylinder of the expansion component to drive the piston rod downward, causing the pull rod to expand the expansion sleeve. This allows the outer wall of the expansion sleeve to expand and fix the spline hole at the center of the gear hub, ensuring that the gear hub does not rotate axially throughout the entire detection process. At this point, the positional accuracy of the sliding groove on the outer circumference of the gear hub is uniformly detected by the various detection arms on the detection component. This solves the problem of misjudgment of detection results caused by the rotation and displacement of the gear hub in the existing technology, thus improving the detection accuracy of the sliding groove position.

[0009] Furthermore, the positioning disk is provided with a standard positioning groove along the circumference, and the distribution position of the detection arm on the annular ring corresponds to the distribution position of the standard positioning groove on the positioning disk, and the bottom of the detection arm at the corresponding position can be inserted into the standard positioning groove.

[0010] Beneficial effects: The standard positioning grooves set along the circumference of the positioning plate correspond to the positions of the detection arms. On the one hand, they serve as the basis for the pre-positioning of the gear hub being inspected on the positioning plate, so as to quickly adjust the pre-positioning position of the gear hub and facilitate the subsequent insertion of the detection arm into the corresponding groove on the outer circumference of the gear hub. On the other hand, they can be used in conjunction with the detection arm. After the detection arm is inserted into the groove on the outer circumference of the gear hub, it also needs to be inserted into the standard positioning groove to determine whether the position of the groove on the outer circumference of the gear hub is within the position range of the standard positioning groove, thereby achieving the purpose of position accuracy detection. Furthermore, the bottom of the positioning plate is provided with a positioning plate, and the limiting component includes a mounting base fixed on the positioning plate, a pin slidably connected to the mounting base, and a spring sleeved on the pin rod; the tail end of the pin is threadedly connected to a handle, and the end of the pin away from the handle is provided with a conical head.

[0011] Beneficial effects: The limiting component is used to achieve rapid axial positioning and unlocking of the gear hub. During testing, the handle is first pulled radially away from the expansion sleeve to make room for the conical head of the pin, so that the spline hole in the center of the gear hub is fitted onto the expansion sleeve to achieve pre-positioning of the gear hub. Then, the handle is released, and the spring force is used to insert the conical head of the pin into the corresponding tooth groove on the outer circumference of the gear hub, thus achieving pre-locking of the circumferential position of the gear hub. Subsequently, it is convenient for the expansion sleeve in the tightening component to finally lock the gear hub, which helps to improve the convenience of the testing operation and the accuracy of the testing results.

[0012] Furthermore, the expansion sleeve is provided with multiple strip grooves evenly distributed along its circumference, and the inner wall of the expansion sleeve at its center and the outer circumferential surface of the top of the pull rod are both conical surfaces with the same taper.

[0013] Beneficial effects: The multiple strip grooves evenly distributed along the circumference of the expansion sleeve provide ample deformation space for the radial expansion of the expansion sleeve, ensuring that the expansion sleeve can expand evenly along the circumference when the tie rod is pulled, avoiding positioning offset caused by uneven local tightening force; at the same time, the inner wall of the expansion sleeve and the outer circumferential surface of the top of the tie rod adopt the same tapered surface design. When the tie rod moves, the tapered surface at the top of the tie rod can smoothly convert the axial tension of the tie rod into the radial tightening force of the expansion sleeve, so as to realize the expansion and locking of the spline hole in the gear hub, thereby improving the reliability of the expansion and locking.

[0014] Furthermore, the cylinder is a single-acting cylinder, and the air inlet of the single-acting cylinder is connected to an air inlet pipe. A solenoid valve is installed on the air inlet pipe, and the solenoid valve is controlled to open and close by an electrical switch.

[0015] Beneficial effects: Compared with double-acting cylinders, single-acting cylinders simplify the air circuit connection structure, reduce air circuit failure points, and lower the overall maintenance cost and complexity of the inspection tool; on the other hand, by controlling the on and off of the solenoid valve through an electrical switch, the air intake drive and air cut-off reset of the cylinder can be quickly realized. The operation can be completed simply by pressing the switch, which greatly shortens the positioning and unlocking time of the tensioning component and improves the inspection efficiency. Attached Figure Description

[0016] Figure 1 This is a top view of the positioning disc, limiting component, and tightening component of this utility model.

[0017] Figure 2 for Figure 1 The front view after removing the limit components.

[0018] Figure 3 for Figure 2 Half-section view after the gear hub is installed.

[0019] Figure 4 This is a top view of the detection component of this utility model.

[0020] Figure 5 for Figure 4 Sectional view of AA.

[0021] Figure 6 for Figure 3 Half-section view after the detection components are installed. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: 1. Gear hub, 2. Slide groove, 3. Standard positioning groove, 4. Positioning disc, 401. Positioning plate, 5. Worktable, 6. Single-acting cylinder, 7. Piston rod, 8. Expansion sleeve, 801. Strip groove, 9. Tie rod, 10. Spring, 11. Mounting base, 12. Pin, 13. Handle, 14. Ring, 15. Detection arm.

[0023] Example 1 like Figures 1 to 6 As shown, the synchronizer hub position gauge includes a positioning plate 4, a limiting component with screws fixed on the positioning plate 4, a tightening component with screws fixed to the bottom of the positioning plate 4, and a detection component for detecting the position of the hub 1 groove 2.

[0024] The bottom of the positioning disk 4 is provided with an integrally formed positioning plate 401. The diameter of the positioning plate 401 is larger than that of the positioning disk 4, such as... Figures 1 to 3 As shown, the positioning plate 401 facilitates the screw fixing of the entire positioning disk 4 onto the worktable 5. Standard positioning grooves 3 are evenly distributed along the circumference of the positioning disk 4, and the standard positioning grooves 3 serve as the basis for detecting the position of the sliding groove 2 on the outer circumference of the gear hub 1.

[0025] like Figure 1As shown, the limiting assembly includes a mounting base 11 fixed to the positioning plate 401 with screws, a pin 12 slidably connected to the mounting base 11, and a spring 10 sleeved on the rod of the pin 12. The mounting base 11 has a sliding hole, and the rod of the pin 12 slides in conjunction with the sliding hole on the mounting base 11. The tail end of the pin 12 is threadedly connected to a handle 13. The end of the pin 12 away from the handle 13 has an integrally formed conical head. The conical head includes a conical section and a cylindrical section. The diameter of the cylindrical section is larger than the diameter of the rod of the pin 12, and the outer diameter of the spring 10 is smaller than the outer diameter of the cylindrical section, so that the two ends of the spring 10 can abut against the mounting base 11 and the cylindrical section respectively. The elastic force of the spring 10 can maintain the tendency to push the conical head toward the center of the positioning plate 4.

[0026] like Figures 1 to 3 As shown, the expansion assembly includes a cylinder located at the bottom center of the positioning plate 4, a pull rod 9 fixed to the end of the piston rod 7 of the cylinder, and an expansion sleeve 8 fixed to the top center of the positioning plate 4. The cylinder is a single-acting cylinder 6, fixed to the bottom of the worktable 5 by screws. The air inlet of the single-acting cylinder 6 is connected to an air inlet pipe, and a solenoid valve is installed on the air inlet pipe. The solenoid valve is controlled by an electrical switch (the air inlet pipe, solenoid valve, and electrical switch are omitted in the figure). The positioning plate 4 has a central hole. The piston rod 7 of the cylinder extends upward from the bottom of the worktable 5 into the central hole and is fixed to the lower end of the pull rod 9 by a threaded connection. The lower part of the expansion sleeve 8 is fixed in the central hole of the positioning plate 4 by an interference fit, and the pull rod 9 passes through the central hole of the expansion sleeve 8. Figure 2 As shown, the expansion sleeve 8 has multiple strip grooves 801 evenly distributed along its circumference, such as... Figure 3 As shown, the inner wall of the expansion sleeve 8 and the outer circumferential surface of the top of the tie rod 9 are both conical surfaces with the same taper. This allows the outer circumferential surface of the top of the tie rod 9 to contact and fit with the inner wall of the expansion sleeve 8, which helps the expansion sleeve 8 to expand evenly.

[0027] like Figure 4 and Figure 5 As shown, the detection assembly includes an annular ring 14 and multiple detection arms 15 fixed below the annular ring 14. The upper end of each detection arm 15 is provided with a protrusion, and the annular ring 14 is provided with a corresponding groove. The protrusion and the groove are inserted into the groove by an interference fit so that all the detection arms 15 are integrated into one annular ring 14. The distribution position of the detection arms 15 on the annular ring 14 corresponds to the distribution position of the standard positioning groove 3 on the positioning disk 4. The bottom of the detection arm 15 at the corresponding position can be inserted into the standard positioning groove 3.

[0028] The method of using this inspection tool is as follows: like Figure 6As shown, first ensure that the single-acting cylinder 6, solenoid valve, and electrical switch control are all normal. During testing, first pull the handle 13 radially away from the expansion sleeve 8 to make room for the conical head of the pin 12. Then place the gear hub 1 to be tested on the positioning plate 4, so that the inner spline fits the expansion sleeve 8. Rotate the gear hub 1 so that each sliding groove 2 on the outer circumference of the gear hub 1 is roughly aligned with the standard positioning groove 3 on the positioning plate 4 (because the positional accuracy error of the sliding groove 2 will not be large during normal processing, so all sliding grooves 2 will roughly coincide with the position of the standard positioning groove 3. If they cannot coincide completely, it means that the position of the sliding groove 2 processed by the gear hub 1 has been seriously deviated). Then, release handle 13, and spring 10 pushes the conical head into the tooth groove on the outer circumference of the gear hub 1 to complete the initial circumferential positioning of the gear hub 1; then press the electrical switch to control the solenoid valve to vent, the piston rod 7 of the single-acting cylinder 6 moves down and drives the pull rod 9 down. Because the outer circumferential surface of the top of the pull rod 9 matches the conical surface of the inner hole of the expansion sleeve 8 and the expansion sleeve 8 has a strip groove 801, the top of the pull rod 9 will expand the expansion sleeve 8, so that the outer circumference of the expansion sleeve 8 expands evenly and fits tightly with the spline inside the gear hub 1, thereby achieving the expansion and locking of the gear hub 1; then place the entire detection assembly above the gear hub 1, pre-align the detection arm 15 with the standard positioning groove 3 of the positioning plate 4, and insert it downwards into each gear hub. In the outer peripheral groove 2 of 1, observe whether all the detection arms 15 can pass smoothly through the groove 2 of the gear hub 1 and be inserted into the standard positioning groove 3 on the positioning plate 4. If they can all be inserted, the position of the groove 2 of the gear hub 1 is qualified. If some of the detection arms 15 cannot be inserted into the groove 2, it means that the position of the groove 2 of the gear hub 1 is unqualified, and thus qualified products and defective products can be distinguished. After the test is completed, remove the detection assembly, press the electrical switch to cut off the air, the piston rod 7 of the single-acting cylinder 6 is reset, the pull rod 9 springs up to make the expansion sleeve 8 contract, pull the pin 12 and handle 13 to remove the conical head, and remove the gear hub 1 to complete a single test. Repeat the above steps for continuous tests.

[0029] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A synchronizer hub position gauge, characterized in that: It includes a positioning plate, a limiting component fixed on the positioning plate, a tightening component fixed to the bottom of the positioning plate, and a detection component for detecting the position of the gear hub groove; the limiting component is used for initial positioning of the gear hub. The detection assembly includes an annular ring and multiple detection arms fixed below the annular ring. The detection arms are used to detect the position of the groove on the outer periphery of the gear hub. The expansion assembly includes a cylinder located at the bottom center of the positioning plate, a pull rod fixed to the end of the piston rod of the cylinder, and an expansion sleeve fixed at the top center of the positioning plate, with the pull rod located inside the central hole of the expansion sleeve.

2. The synchronizer hub position gauge according to claim 1, characterized in that: The positioning disk has a standard positioning groove along its circumference. The distribution position of the detection arm on the annular ring corresponds to the distribution position of the standard positioning groove on the positioning disk. The bottom of the detection arm at the corresponding position can be inserted into the standard positioning groove.

3. The synchronizer hub position gauge according to claim 2, characterized in that: The bottom of the positioning plate is provided with a positioning plate, and the limiting component includes a mounting base fixed on the positioning plate, a pin slidably connected to the mounting base, and a spring sleeved on the pin rod; the tail end of the pin is threadedly connected to a handle, and the end of the pin away from the handle is provided with a conical head.

4. The synchronizer hub position gauge according to claim 3, characterized in that: The expansion sleeve has multiple strip grooves evenly distributed along its circumference. The inner wall of the expansion sleeve at its center and the outer circumferential surface of the top of the pull rod are both conical surfaces with the same taper.

5. The synchronizer hub position gauge according to claim 4, characterized in that: The cylinder is a single-acting cylinder. The air inlet of the single-acting cylinder is connected to an air inlet pipe. A solenoid valve is installed on the air inlet pipe. The solenoid valve is controlled to open and close by an electrical switch.

Images