A manual shift travel measuring mechanism for a transmission

Abstract

The application provides a gearbox manual gear shifting stroke measuring mechanism, which is accurate, easy to operate, applicable to any gearbox of the same gear shifting mechanism, portable, practical and high in utilization rate. The mechanism comprises a main base, a gear shaft, a meshing rack, a horizontal digital display module and a rotating connecting rod. The main base is provided with a gear shaft positioning cavity, a rack guiding cavity and a horizontal digital display module supporting block. The shaft body is vertically installed in the gear shaft positioning cavity through bearings at upper and lower positions. The upper end of the shaft body protrudes from the main base and is fixed with the rotating connecting rod. The lower end of the shaft body protrudes from the main base and is provided with the second gear, which is used for meshing with the gear shifting teeth of the gearbox.

Description

Technical Field

[0001] This invention relates to the technical field of gearbox structure, specifically to a manual shift travel measuring mechanism for a gearbox. Background Technology

[0002] During the gearbox shifting test, electric shifting mechanisms often fail due to shifting travel issues. Currently used electric shifting mechanisms measure the shifting travel through angle sensors, which introduces measurement errors. Furthermore, the measurement requires power to the electric shifting mechanism and dedicated wiring harnesses, software, and programs to control shifting. The measured travel data also needs to be viewed on a computer using specialized software, making the operation cumbersome and complex. This demands high operator skill, requires specific operating environments, and involves numerous, inconveniently portable testing tools. There is also no simple means or mechanism to retest and obtain the actual shifting displacement value for comparison. Consequently, the shifting displacement range is calculated based on theoretical values, and the actual manufacturing errors of related components are difficult to measure and reflect in the assembly. This negatively impacts the gearbox shifting test pass rate, and subsequent problem analysis is time-consuming and labor-intensive. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a manual shift travel measuring mechanism for gearboxes. It offers precise measurement, simple operation, applicability to any gearbox with the same shift mechanism, portability, high practicality, and high utilization rate.

[0004] A manual shift travel measuring mechanism for a gearbox, characterized in that it comprises:

[0005] Main base;

[0006] A gear shaft, comprising a shaft body, a first gear, and a second gear;

[0007] meshing rack;

[0008] A horizontal digital display module, which includes a horizontal digital display template and a digital display module connecting block;

[0009] And rotating links;

[0010] The main body base is provided with a gear shaft positioning cavity, a rack guide cavity, and a horizontal digital display module support block;

[0011] The shaft is vertically mounted in the gear shaft positioning cavity via bearings at upper and lower positions. The upper end of the shaft protrudes from the main body base and is fixedly mounted with a rotating connecting rod. The lower end of the shaft protrudes from the main body base and is provided with a second gear. The second gear is used to mesh with the gear shift gears of the transmission. The first gear is located inside the gear shaft positioning cavity. The meshing rack is placed in the rack guide cavity and is laterally movable. The first gear meshes with the meshing rack. The exposed end of the meshing rack is fixedly connected to a digital display module connecting block. The digital display module connecting block moves laterally along the horizontal digital display template. The horizontal digital display template is supported on the horizontal digital display module support block.

[0012] Its further features are:

[0013] The meshing rack has the same meshing tooth parameters as the first gear, and the parameters of the first gear and the second gear are the same, so that the stroke is converted in a 1:1 ratio, ensuring measurement accuracy;

[0014] The main body base is provided with a lower outer stop that mates with the inner stop of the gearbox under test. The main body base and the gearbox are connected by bolts. The output end of the meshing rack and the input end of the digital display module connecting block are fixedly connected by bolts.

[0015] The top of the shaft is a polygonal segment with an internal threaded hole at the center. A rotating sleeve is fixed to the top polygonal segment of the shaft. A locking bolt passes through the top through hole of the rotating sleeve and is fixed to the internal threaded hole. The side wall of the rotating sleeve has an internal threaded hole. The rotating connecting rod is fixed to the rotating sleeve by threads and a locking nut. By rotating the rotating connecting rod, the linear displacement value can be displayed on the horizontal digital display model.

[0016] The above technical solution has a compact structure, small size, and is easy to carry and use. At the same time, the measurement method is simple and the measurement results are accurate. It can quickly measure the shift stroke of the gearbox assembly and determine whether there is any abnormality in the shifting components. It can be compared with the measurement data of the electric shifting mechanism to determine the consistency of the measurement, provide actual data reference for the shifting program, and help improve the shifting performance of the product. It is compatible with the shift stroke measurement of various gearboxes that use the same electric shifting mechanism, with strong compatibility and high utilization rate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the present invention cut along the center of the gear axis;

[0019] Figure 3 This is a schematic diagram showing the internal structure of the main body base removed in this invention;

[0020] Figure 4 This is a cross-sectional schematic diagram of the present invention installed on the product;

[0021] The names corresponding to the serial numbers in the diagram are as follows:

[0022] Main body base 10, gear shaft positioning cavity 11, rack guide cavity 12, horizontal digital display module support block 13, gear shaft 20, shaft body 21, first gear 22, second gear 23, meshing rack 30, horizontal digital display module 40, horizontal digital display mold 41, digital display module connecting block 42, bolt 43, rotating connecting rod 50, first bearing 60, second bearing 70, first hole retaining ring 80, second hole retaining ring 90, rotating sleeve 100;

[0023] 1. Locking bolt; 2. Pressure washer. Detailed Implementation

[0024] A manual shift travel measuring mechanism for a gearbox, see Figures 1-3 It includes a main base 10, a gear shaft 20, a meshing rack 30, a horizontal digital display module 40, and a rotating connecting rod 50;

[0025] The gear shaft 20 includes a shaft body 21, a first gear 22, and a second gear 23; the horizontal digital display module 40 includes a horizontal digital display model 41 and a digital display module connecting block 42; the main body base 10 is provided with a gear shaft positioning cavity 11, a rack guide cavity 12, and a horizontal digital display module support block 13.

[0026] The shaft 21 is vertically mounted in the gear shaft positioning cavity 11 via bearings at the upper and lower positions. The upper end of the shaft 21 protrudes from the main body base 10 and is fixedly mounted with a rotating connecting rod 50. The lower end of the shaft 21 protrudes from the main body base 10 and is provided with a second gear 23. The second gear 23 is used to mesh with the gear shift teeth of the transmission. The first gear 22 is located inside the gear shaft positioning cavity 11. The meshing rack 30 is placed in the rack guide cavity and is laterally movable. The first gear 22 meshes with the meshing rack 30. The exposed end of the meshing rack 30 is fixedly connected to the digital display module connecting block 42. The digital display module connecting block 42 moves laterally along the horizontal digital display mold 41. The horizontal digital display mold 41 is supported on the horizontal digital display module support block 13.

[0027] In specific implementation, the shaft 21 is installed on the main body base 10 with the first bearing 60 and the second bearing 70 as the two ends support. The first bearing 60 is fixed to the main body base 10 with a retaining ring 80 through the first hole, and the second bearing 70 is fixed to the main body base 10 with a retaining ring 90 through the second hole.

[0028] The meshing rack 30 has the same meshing tooth parameters as the first gear 22, and the first gear 22 has the same parameters as the second gear 23, which enables a 1:1 stroke conversion and ensures measurement accuracy.

[0029] The main body base 10 is provided with a lower outer stop that mates with the inner stop of the gearbox under test. The main body base 10 and the gearbox are connected by bolts. The output end of the meshing rack 30 and the input end of the digital display module connecting block 42 are fixedly connected by bolts 43.

[0030] The top of the shaft 21 is a polygonal segment with an internal threaded hole at the center. A rotating sleeve 100 is fixedly mounted on the polygonal segment at the top of the shaft 21. The locking bolt 1 passes through the clamping washer 2, passes through the top through hole of the rotating sleeve 100, and is fixedly connected to the internal threaded hole. The side wall of the rotating sleeve 100 has an internal threaded hole. The rotating connecting rod 50 is fixedly connected to the rotating sleeve 100 by threads and a locking nut. By rotating the rotating connecting rod, the displacement value of the line can be displayed on the horizontal digital display model.

[0031] like Figure 4 For example, the manual shift travel measuring mechanism is installed in the corresponding hole of the gearbox mechanism and fixed by the stop bolt. Rotating the rotating connecting rod 50 causes the shaft 21 to rotate, which in turn drives the internal gearbox shift rack and the meshing rack 30 in the measuring mechanism to move. The meshing rack 30 drives the horizontal digital display scale 41 to move along the scale. The shift rack displacement data can be displayed on the digital display interface of the horizontal digital display scale 41. The operation is simple and the displacement can be visually detected.

[0032] Its compact structure and small size make it easy to carry and use. It also features a simple measurement method and accurate measurement results. It can quickly measure the shift stroke of the gearbox assembly to determine if there are any abnormalities in the shift components. It can be compared with the measurement data of the electric shift mechanism to determine the consistency of the measurement, providing actual data reference for the shift program and helping to improve the shift performance of the product. It is compatible with the shift stroke measurement of various gearboxes that use the same electric shift mechanism, with strong compatibility and high utilization rate.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A manual shift travel measuring mechanism for a gearbox, characterized in that, It includes: Main base; A gear shaft, comprising a shaft body, a first gear, and a second gear; meshing rack; A horizontal digital display module, which includes a horizontal digital display template and a digital display module connecting block; And rotating links; The main body base is provided with a gear shaft positioning cavity, a rack guide cavity, and a horizontal digital display module support block; The shaft is vertically mounted in the gear shaft positioning cavity via bearings at upper and lower positions. The upper end of the shaft protrudes from the main body base and is fixedly mounted with a rotating connecting rod. The lower end of the shaft protrudes from the main body base and is provided with a second gear. The second gear is used to mesh with the gear shift gears of the transmission. The first gear is located inside the gear shaft positioning cavity. The meshing rack is placed in the rack guide cavity and is laterally movable. The first gear meshes with the meshing rack. The exposed end of the meshing rack is fixedly connected to a digital display module connecting block. The digital display module connecting block moves laterally along the horizontal digital display template. The horizontal digital display template is supported on the horizontal digital display module support block. The meshing rack has the same meshing tooth parameters as the first gear, and the parameters of the first gear and the second gear are the same. The main body base is provided with a lower outer stop that mates with the inner stop of the gearbox under test. The main body base and the gearbox are connected by bolts. The output end of the meshing rack and the input end of the digital display module connecting block are fixedly connected by bolts. Install the manual shift travel measuring mechanism into the corresponding mounting hole of the gearbox mechanism and fix it with the stop bolt. Rotate the rotating connecting rod, and the shaft rotates, which at the same time drives the shift rack inside the gearbox and the meshing rack in the measuring mechanism to move. The meshing rack drives the horizontal digital display scale to move along the scale, and the shift rack displacement data can be displayed on the digital display interface of the horizontal digital display scale.

2. The manual shift travel measuring mechanism for a gearbox as described in claim 1, characterized in that: The top of the shaft is a polygonal segment with an internal threaded hole at the center. A rotating sleeve is fixedly mounted on the top polygonal segment of the shaft. A locking bolt passes through the top through hole of the rotating sleeve and is fixedly connected to the internal threaded hole. The side wall of the rotating sleeve has an internal threaded hole. The rotating connecting rod is fixedly connected to the rotating sleeve by threads and a locking nut. The rotating connecting rod is rotated.

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