A motorcycle crankshaft assembly engagement inspection tool
By designing a motorcycle crankshaft assembly meshing inspection fixture, the displacement change is transmitted through the meshing of meshing gears and transmission gears, realizing the quantitative measurement of crankshaft diameter runout. This solves the problems of large detection error and insufficient reliability in existing technologies, and improves detection efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING BOXIAN MASCH CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-07
AI Technical Summary
Existing motorcycle crankshaft assembly testing equipment is complex in structure, expensive, and prone to large human error, making it difficult to accurately capture the diameter runout data during crankshaft rotation, resulting in insufficient reliability of test results.
Design a motorcycle crankshaft assembly meshing inspection tool that transmits displacement changes through the meshing of meshing gears and transmission gears, and uses a dial indicator to detect the displacement of the slide, thereby realizing the quantitative measurement of crankshaft diameter runout.
It improves detection efficiency and the reliability of detection results, and can intuitively obtain the diameter runout data of the crankshaft assembly during rotation to determine whether the meshing accuracy meets production requirements.
Smart Images

Figure CN224470973U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motorcycle crankshaft testing technology, and in particular to a motorcycle crankshaft assembly meshing inspection tool. Background Technology
[0002] In the motorcycle manufacturing industry, the crankshaft assembly, as a core transmission component, directly affects the engine's power transmission efficiency and operational stability, playing a decisive role in the overall performance and service life of the motorcycle. Therefore, accurate detection of the crankshaft assembly's meshing precision is of utmost importance.
[0003] Existing testing equipment is complex in structure and expensive, while manual operation and simple measuring tools have problems such as low testing efficiency, large human error, and difficulty in quantifying testing data. It is difficult to accurately capture the diameter runout data when the crankshaft rotates, resulting in insufficient reliability of the test results. Utility Model Content
[0004] The purpose of this utility model is to provide a motorcycle crankshaft assembly meshing inspection tool, which solves the problems of large errors and difficulty in quantifying test data when manually inspecting crankshaft assemblies, and the difficulty in accurately capturing the diameter runout data of the crankshaft during rotation, resulting in insufficient reliability of the test results.
[0005] To achieve the above objectives, this utility model provides a motorcycle crankshaft assembly meshing inspection tool, including a base and a detection component. The detection component includes a positioning seat, a slide, a transmission gear, a fixed seat, and a dial indicator. The positioning seat is fixedly connected to the base and located on one side of the base. The slide is slidably connected to the base and disposed on the base. The transmission gear is rotatably connected to the slide and located on the side of the slide near the positioning seat. The fixed seat is fixedly connected to the base and located on one side of the base. The dial indicator is connected to the fixed seat, and the probe of the dial indicator contacts the slide.
[0006] The positioning seat has a placement groove, which is disposed on the positioning seat and located on the side of the positioning seat away from the base.
[0007] The slide includes a base, a slider, and a guide rail. The guide rail is fixedly connected to the base and located on one side of the base. The slider is slidably connected to the base and is disposed on the guide rail. The base is fixedly connected to the slider and rotatably connected to the transmission gear.
[0008] The slide block further includes an abutment spring, the two ends of which are connected to the fixed base and the seat body respectively, and the abutment spring is located between the fixed base and the seat body.
[0009] The slide block further includes a guide rod, which is fixedly connected to the fixed seat and slidably connected to the seat body, and passes through the seat body.
[0010] This utility model discloses a motorcycle crankshaft assembly meshing inspection tool. In use, the crankshaft assembly is placed on the positioning seat, and the meshing gear meshes with the transmission gear. The operator rotates the crankshaft assembly, causing the meshing gear to rotate. Since the meshing gear meshes with the transmission gear, the transmission gear rotates synchronously. When the crankshaft assembly has errors such as diameter runout, the meshing gear will experience radial displacement during rotation. This displacement is transmitted to the slide block through the transmission gear, causing the slide block to move along the sliding direction on the base. The dial indicator probe remains in contact with the slide block, and the displacement of the slide block is detected by the dial indicator. The operator only needs to observe the fluctuation of the dial indicator reading to intuitively obtain the diameter runout data of the crankshaft assembly during rotation, and determine whether the meshing accuracy of the crankshaft assembly meets production requirements, thereby improving inspection efficiency and the reliability of inspection results. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0012] Figure 1 This is a schematic diagram of the overall structure of the motorcycle crankshaft assembly meshing inspection tool of this utility model.
[0013] Figure 2 This is a schematic diagram of the installation structure of the transmission gear of this utility model.
[0014] In the diagram: 101-base, 102-detection component, 103-positioning seat, 104-slide, 105-transmission gear, 106-fixed seat, 107-dial indicator, 108-placement slot, 109-seat body, 110-slider, 111-guide rail, 112-abutment spring, 113-guide rod, 114-crankshaft assembly, 115-meshing gear. Detailed Implementation
[0015] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0016] Please see Figure 1 and Figure 2 ,in Figure 1This is a schematic diagram of the overall structure of the motorcycle crankshaft assembly meshing inspection tool. Figure 2 This is a schematic diagram of the installation structure of the transmission gear.
[0017] This utility model provides a motorcycle crankshaft assembly meshing inspection tool, including a base 101 and a detection component 102. The detection component 102 includes a positioning seat 103, a slide 104, a transmission gear 105, a fixed seat 106, and a dial indicator 107. The positioning seat 103 has a placement groove 108. The slide 104 includes a seat body 109, a slider 110, a guide rail 111, a contact spring 112, and a guide rod 113. Through the meshing of the transmission gear 105 and the meshing gear 115, when there is diameter runout in the crankshaft assembly 114, the transmission gear 105 and the slide 104 move. The movement of the slide 104 is detected by the dial indicator 107, thereby inspecting the crankshaft assembly 114. It can be understood that the above solution can be used to improve the inspection efficiency and effect of the crankshaft assembly 114.
[0018] In this specific embodiment, the positioning seat 103 is fixedly connected to the base 101 and located on one side of the base 101; the slide 104 is slidably connected to the base 101 and is disposed on the base 101; the transmission gear 105 is rotatably connected to the slide 104 and is located on the side of the slide 104 near the positioning seat 103; the fixing seat 106 is fixedly connected to the base 101 and located on one side of the base 101; the dial indicator 107 is connected to the fixing seat 106, and the probe of the dial indicator 107 contacts the slide 104; the positioning seat 103 is used to stably place the crankshaft assembly 114, the crankshaft assembly 114 is provided with a meshing gear 115, the transmission gear 105 can mesh with the meshing gear 115, and the slide 104 can slide on the base 101.
[0019] In use, the crankshaft assembly 114 is placed on the positioning seat 103, and the meshing gear 115 is engaged with the transmission gear 105. The operator then rotates the crankshaft assembly 114, causing it to drive the meshing gear 115 to rotate. Since the meshing gear 115 engages with the transmission gear 105, the transmission gear 105 will rotate synchronously. When the crankshaft assembly 114 has errors such as diameter runout, it will cause the meshing gear 115 to undergo radial displacement during rotation. This displacement change will be transmitted through the transmission gear... The gear 105 transmits power to the slide 104, causing the slide 104 to move along the sliding direction on the base 101. The probe of the dial indicator 107 remains in contact with the slide 104, and the displacement of the slide 104 is detected by the dial indicator 107. The operator only needs to observe the fluctuation of the dial indicator 107's reading to intuitively obtain the diameter runout data of the crankshaft assembly 114 during rotation, and determine whether the meshing accuracy of the crankshaft assembly 114 meets the production requirements, thereby achieving the purpose of improving detection efficiency and the reliability of detection results.
[0020] The placement groove 108 is disposed on the positioning seat 103 and located on the side of the positioning seat 103 away from the base 101. The positioning seat 103 is U-shaped, and there are two placement grooves 108 located on both sides of the positioning seat 103. The placement grooves 108 are V-shaped. The crankshaft assembly 114 is stably placed through the placement grooves 108 to avoid the crankshaft assembly 114 shaking during the testing process and affecting the testing.
[0021] Secondly, the guide rail 111 is fixedly connected to the base 101 and located on one side of the base 101; the slider 110 is slidably connected to the seat 109 and is disposed on the guide rail 111; the seat 109 is fixedly connected to the slider 110 and rotatably connected to the transmission gear 105; through the guide rail 111 and the slider 110, the seat 109 can move back and forth along the guide rail 111.
[0022] Meanwhile, the two ends of the abutment spring 112 are respectively connected to the fixed seat 106 and the seat body 109, and the abutment spring 112 is located between the fixed seat 106 and the seat body 109; the elasticity of the abutment spring 112 drives the seat body 109 to move, and the seat body 109 drives the transmission gear 105 to move towards the meshing gear 115, so that the transmission gear 105 and the meshing gear 115 are kept in a meshing state, and the seat body 109 is prevented from moving due to factors other than the diameter runout of the crankshaft assembly 114, which would affect the detection of the crankshaft assembly 114.
[0023] In addition, the guide rod 113 is fixedly connected to the fixed base 106 and slidably connected to the base body 109, and passes through the base body 109; the base body 109 is provided with a guide hole that cooperates with the guide rod 113, the guide rod 113 extends into the guide hole, and guides the movement of the base body 109 through the guide rod 113, thereby improving the stability of the base body 109 when it moves and further improving the accuracy of the detection.
[0024] When using the motorcycle crankshaft assembly meshing inspection tool of this utility model, the crankshaft assembly 114 to be inspected is placed in the V-shaped placement groove 108 of the positioning seat 103 to ensure that the crankshaft assembly 114 remains stable during the inspection process, and the meshing gear 115 is engaged with the transmission gear 105. Then, the crankshaft assembly 114 is manually rotated to drive the meshing gear 115 to rotate, and the meshing gear 115 drives the transmission gear 105 to rotate. If the crankshaft assembly 114 has errors such as diameter runout, the transmission gear 105 will engage the meshing gear 115. The radial displacement change of the gear 115 is transmitted to the seat 109. The seat 109 is displaced along the sliding direction on the guide rail 111 of the base 101. The dial indicator 107 probe captures the displacement change of the slide 104 in real time and converts it into an intuitive reading display. The operator needs to record the maximum and minimum readings of the dial indicator 107 during the complete rotation of the crankshaft assembly 114. The difference between the two is the diameter runout of the crankshaft assembly 114 at the detection position, thereby improving the detection efficiency and accuracy.
[0025] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.
Claims
1. A motorcycle crankshaft assembly engagement inspection tool, comprising a base, characterized in that, It also includes detection components; The detection assembly includes a positioning seat, a slide, a transmission gear, a fixed seat, and a dial indicator. The positioning seat is fixedly connected to the base and located on one side of the base. The slide is slidably connected to the base and is disposed on the base. The transmission gear is rotatably connected to the slide and is located on the side of the slide near the positioning seat. The fixed seat is fixedly connected to the base and located on one side of the base. The dial indicator is connected to the fixed seat, and the probe of the dial indicator is in contact with the slide.
2. The motorcycle crankshaft assembly engagement inspection tool as described in claim 1, characterized in that, The positioning seat has a placement groove, which is disposed on the positioning seat and located on the side of the positioning seat away from the base.
3. The motorcycle crankshaft assembly engagement inspection tool as described in claim 1, characterized in that, The slide includes a base, a slider, and a guide rail. The guide rail is fixedly connected to the base and located on one side of the base. The slider is slidably connected to the base and is disposed on the guide rail. The base is fixedly connected to the slider and rotatably connected to the transmission gear.
4. The motorcycle crankshaft assembly engagement inspection tool as described in claim 3, characterized in that, The slide also includes an abutment spring, the two ends of which are connected to the fixed seat and the seat body respectively, and the abutment spring is located between the fixed seat and the seat body.
5. The motorcycle crankshaft assembly engagement inspection tool as described in claim 4, characterized in that, The slide also includes a guide rod, which is fixedly connected to the fixed seat and slidably connected to the seat body, and passes through the seat body.