A measuring tool for the gear selection stroke of a manual transmission assembly

Abstract

The present invention discloses a measuring fixture for the gear selection stroke of a manual transmission assembly. The front end of the zipper passes through a through hole in a zipper fixing block and is movably connected to the zipper fixing block. A slot is provided on the zipper fixing block. The rear end of the zipper is connected to a gear selection rocker arm connector. A mounting hole is provided on the gear selection rocker arm connector. The zipper fixing block is connected to the countersunk hole at the rear end of the fixture fixing seat. The front end of the zipper is inserted into the through hole of the fixture fixing seat. A displacement sensor is fixed in the through hole at the front end of the fixture fixing seat. The front end of the zipper contacts the measuring pin of the displacement sensor. The present invention replaces the previous measurement method of measuring the gear selection stroke using a depth gauge. The gear selection stroke can be directly read out by a digital display micrometer, making the gear selection stroke measurement of the transmission assembly simple and quick, thereby ensuring that the gear selection stroke of the transmission assembly meets the process requirements.

Description

Technical Field

[0001] The invention relates to a manual transmission assembly gear selection stroke measuring tool, belonging to the technical field of auto parts machining. Background Art

[0002] At present, when the transmission assembly is installed in the vehicle, if the gear selection travel of the transmission itself is too large or too small, the gear shift seat connected to the gearbox will not select the gear properly, which will cause the gear shift to be stuck or unable to engage the gear. If the gear shift is stuck or unable to engage the gear while the vehicle is driving on the road, it is likely to cause safety hazards.

[0003] In order to control the gear selection stroke value of the transmission assembly when it leaves the factory, the prior art uses a depth gauge to measure and calculate the gear selection stroke of the transmission assembly, which is the distance between the gear selection rocker arm pin in the third and fourth gear positions and the first and second gear positions. The depth gauge measurement requires measuring the distance from the gear selection rocker arm pin to the reference in the third and fourth gears and the distance from the gear selection rocker arm pin to the reference in the first and second gears with the end face of the zipper bracket as the reference, and the difference between the two measured distance values ​​is the gear selection stroke of the first and second gears.

[0004] However, the depth gauge is a standard measuring tool, and when measuring, it is necessary to apply a tight force while visually reading the scale line. During batch operation, the ergonomics is poor, the cycle is long, and the measured value is prone to errors. Summary of the invention

[0005] Purpose: In order to overcome the shortcomings of the prior art in measuring the gearbox selection stroke, the present invention provides a manual transmission assembly selection stroke measuring tool.

[0006] Technical solution: To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A manual transmission assembly gear selection stroke measurement gauge comprises: a displacement sensor, a gauge fixing seat, and a gear selection zipper assembly, wherein the gear selection zipper assembly comprises: a zipper fixing block, a zipper, and a gear selection rocker arm connector, wherein the front end of the zipper passes through a through hole in the zipper fixing block and is movably connected to the zipper fixing block, a card slot is provided on the zipper fixing block, the rear end of the zipper is connected to the gear selection rocker arm connector, and a mounting hole is provided on the gear selection rocker arm connector; the zipper fixing block is clamped in a countersunk hole at the rear end of the gauge fixing seat, the front end of the zipper is inserted into the through hole of the gauge fixing seat, the displacement sensor is fixed in the through hole at the front end of the gauge fixing seat, and the front end of the zipper contacts a measuring pin of the displacement sensor.

[0008] As a preferred solution, it also includes a rubber dust cover, which is sleeved on the zipper.

[0009] As a preferred solution, the rubber dust cover adopts a bellows structure.

[0010] As a preferred solution, the displacement sensor adopts a digital micrometer.

[0011] As a preferred solution, the gauge fixing seat adopts a cylindrical stepped shaft structure.

[0012] As a preferred solution, the zipper fixing block is interference-fitted with the countersunk hole of the gauge fixing seat, is pressed into the gauge fixing seat by press-fitting, and is limited by the step of the countersunk hole of the gauge fixing seat.

[0013] As a preferred solution, the support screw on the side of the inspection fixture fixing seat is fixed to the ejector sleeve of the displacement sensor.

[0014] Beneficial effects: The present invention provides a manual transmission assembly selection stroke measuring tool, which replaces the previous measurement method of using a depth gauge to measure the selection stroke. The selection stroke can be directly read out through a digital micrometer, making the selection stroke measurement of the transmission assembly simple and fast, thereby ensuring that the selection stroke of the transmission assembly meets the process requirements. The present invention has a simple structure, is easy to install, and can quickly and accurately measure the selection stroke of the transmission assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross section of the measuring fixture.

[0016] Figure 2 This is a schematic diagram of the front view of the measuring fixture.

[0017] Figure 3 It is a top view of the installation structure for measuring the measuring fixture.

[0018] Figure 4 This is the front view of the installation structure for measuring the measuring fixture. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific embodiments.

[0020] The purpose of the present invention is to design a measuring fixture for measuring the gear selection stroke of a manual transmission to address the inaccurate gear shifting stroke phenomenon such as the gear being stuck or not being able to shift into gear. After the gear is selected, the gear selection zipper pushes the digital dial gauge, converting the displacement of the gear selection zipper into the value of the digital dial gauge, and judging whether the gear selection stroke of the gearbox assembly meets the process requirements by the value.

[0021] See also Figure 1-2A manual transmission assembly gear selection stroke measuring gauge, comprising: a digital dial gauge 1, a gauge fixing seat 2, and a gear selection zipper assembly 3. The digital dial gauge 1 is a standard purchased part, including a digital display panel 101 and a measuring ejector pin 102; the gear selection zipper assembly 3 includes: a zipper fixing block 301, a zipper 302, a rubber dust cover 303, and a gear selection rocker arm connector 304. The zipper fixing block 301 is set as a cylindrical component, with a cylindrical card slot 305 on the outside and a through hole 306 in the center; the zipper 302 passes through the through hole 306 in the center of the zipper fixing block 301, and one end of the zipper 302 is connected to the gear selection rocker arm. The connecting head 304 is connected together, and the two are integrally connected to the zipper fixing block 301 for movement. A mounting hole 307 is provided in the center of the gear selector rocker arm connecting head 304. The rubber dust cover 303 is sleeved on the zipper 302. The rubber dust cover 303 adopts a bellows structure. When the zipper 302 moves, the rubber dust cover 303 is compressed and recovers automatically after the force is removed. The inspection fixture fixing seat 2 is set as a cylindrical stepped shaft structure. The stepped diameter is used for weight reduction. A countersunk hole 201 and a through hole 202 are provided in the center. The hole 201 is connected to the zipper fixing block 301. The aperture of the countersunk hole 201 is consistent with the cylindrical diameter of the zipper fixing block 301. The free end of the zipper 302 passes through the zipper fixing block 301 and is inserted into the through hole 202 of the inspection fixture fixing seat 2, and contacts with the digital display micrometer 1 measuring thimble 101 in the through hole 202. The aperture of the through hole 202 is consistent with the outer diameter of the digital display micrometer 1 measuring thimble 101. Both ends of the cylinder of the inspection fixture fixing seat 2 need to be through, and the through hole needs to leave the zipper fixing block 301 and the zipper 302. And the digital micrometer 1 measures the ejector 101; the digital micrometer 1 measures the ejector and the hole clearance at one end of the gauge fixing seat 2, and is fixed to the ejector sleeve 103 that is movably sleeved on the end of the measuring ejector 101 through the side support screw 203, so as to facilitate the adjustment of the relative position of the digital micrometer 1 and the gauge fixing seat 2; the zipper fixing block 301 has an interference fit with the countersunk hole of the gauge fixing seat 2, and is pressed into the gauge fixing seat 2 by press-fitting, and is limited by the step 204 of the countersunk hole 201 of the gauge fixing seat 2.

[0022] The digital display micrometer can display the displacement value of the zipper in real time after the measuring needle moves, replacing the original depth gauge reading. And any position within the measuring range of 0-25.4mm can be set as the initial digital display 0 position to meet the initial position of the neutral gear of different sizes of transmissions.

[0023] The inspection fixture fixing seat 2 connects the digital display micrometer 1 and the gear selection zipper assembly 3 into a whole.

[0024] Embodiment 1:

[0025] See also Figure 3-4When in use, the zipper fixing block fixes the inspection fixture on the gear selection zipper bracket 4 through the card slot. The gear selection zipper bracket 4 is the reference of the inspection fixture. The gear selection rocker arm connecting head is sleeved on the pin shaft of the gear selection rocker arm 5 through the central mounting hole. The inspection fixture is installed in place. After it is in place, the zipper contacts the measuring thimble of the digital display micrometer and compresses the measuring thimble by about 3mm to avoid a gap between the zipper and the measuring thimble; at the same time, the displacement of the gear selection rocker arm 5 during gear selection swinging can be transmitted to the digital display micrometer in real time through the zipper.

[0026] The present invention combines the gear selection zipper assembly and the digital micrometer through a cylindrical gauge fixing seat, and then fixes the gauge on the gear selection zipper bracket through a zipper fixing block and finds a reference; secondly, the zipper and the gear selection rocker arm connecting head are used to transmit the displacement of the gear selection rocker arm gear selection swing; thirdly, the digital micrometer is used to directly display the travel value of the gear selection rocker arm after the gear selection swing.

[0027] The advantage of the present invention is that it simplifies the measurement process of the gear selection stroke of the manual transmission assembly at a low cost, which not only optimizes the ergonomics when measuring the gear selection stroke, but also improves the reliability of the gear selection stroke measurement value, thereby ensuring that the gear selection stroke of the transmission assembly meets the process requirements.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A manual transmission assembly gear selection stroke measuring tool, characterized in that: include: A displacement sensor, a gauge fixing seat, and a gear selection zipper assembly, wherein the gear selection zipper assembly comprises: a zipper fixing block, a zipper, and a gear selection rocker arm connector, wherein the front end of the zipper passes through a through hole in the zipper fixing block and is movably connected to the zipper fixing block, a card slot is provided on the zipper fixing block, the rear end of the zipper is connected to the gear selection rocker arm connector, and a mounting hole is provided on the gear selection rocker arm connector; the zipper fixing block is clamped in the countersunk hole at the rear end of the gauge fixing seat, the front end of the zipper is inserted into the through hole of the gauge fixing seat, the displacement sensor is fixed in the through hole at the front end of the gauge fixing seat, and the front end of the zipper contacts with a measuring pin of the displacement sensor.

2. A manual transmission assembly selection stroke measuring jig according to claim 1, characterized in that: The utility model also comprises a rubber dust cover which is sleeved on the zipper.

3. A manual transmission assembly selection stroke measuring jig according to claim 2, characterized in that: The rubber dust cover adopts a bellows structure.

4. A manual transmission assembly selection stroke measuring jig according to claim 1, characterized in that: The support screw on the side of the inspection fixture fixing seat is fixed to the displacement sensor ejector sleeve.

5. The manual transmission assembly selection stroke measuring jig according to claim 1, characterized in that: The inspection fixture fixing seat adopts a cylindrical stepped shaft structure.

6. A manual transmission assembly selection travel measuring jig according to claim 1, characterized in that: The zipper fixing block is interference-fitted with the countersunk hole of the inspection fixture fixing seat, is pressed into the inspection fixture fixing seat by press-fitting, and is limited by the step of the countersunk hole of the inspection fixture fixing seat.

7. A manual transmission assembly selection stroke measuring jig according to any one of claims 1 to 6, characterized in that: The displacement sensor adopts a digital micrometer.

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