Gear run-out detection tool

Abstract

The utility model belongs to the technical field of machining, and particularly discloses a gear run-out detection tool which comprises a base plate and a gear detection assembly arranged on the base plate in a sliding mode, a supporting seat is arranged on one side of the gear detection assembly, and a precision measuring instrument and a pressure sensing device are arranged on the other side of the gear detection assembly. The gear detection assembly can slide along the side where the precision measuring instrument and the pressure sensing device are located, and the gear detection assembly is in contact with the precision measuring instrument and the pressure sensing device during sliding. The device is simple in structure and easy to operate, and the detection accuracy and the detection efficiency can be improved by adopting the cooperation of the pressure sensing device and the precision measuring instrument.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and in particular relates to a gear jump detection tool. Background Art

[0002] The gears on the crankshaft play a key role in the engine and mechanical system, transmitting power, adjusting the transmission ratio, changing the axis direction and ensuring the timing of the engine. They also play a balancing role when the crankshaft runs at high speed. The stable operation of the gears ensures the efficient and stable operation of the engine and mechanical devices.

[0003] After the crankshaft is assembled with gears, the gears are usually tested for runout, which reflects whether the gears are qualified and whether there are defects such as burrs on the gear transmission teeth, detects the smoothness of gear rotation and gear transmission performance, and promptly discovers and solves potential problems. For example, the patent with publication number CN116007465A discloses a crankshaft tooth meshing runout and span detection fixture, which is equipped with speed regulating gears and timing gears, including a base plate; a positioning assembly, the positioning assembly includes a first V-shaped block and a second V-shaped block, one side of the first V-shaped block and the second V-shaped block are respectively connected to a bearing group, and when testing, the shaft body of the crankshaft is connected to the two bearing groups; a tooth meshing detection assembly, including a first sliding track, a mandrel seat is slidably connected to the sliding track, and a mandrel is fixedly connected to the mandrel seat; a span detection assembly, including a second sliding track, a slider seat is slidably connected to the second sliding track, a linkage plate is fixed on the slider seat, and a contact is fixed on the linkage plate, and the contact contacts the timing teeth on the crankshaft. The inspection fixture disclosed in the patent can quickly locate the crankshaft, and by rotating the crankshaft, it can simultaneously detect whether the tooth meshing jump and the span length of the crankshaft are within a reasonable error. For example, the patent with the publication number CN215810534U discloses a gear meshing jump detection device, including a horizontal base plate, a support structure is provided on one side of the upper surface of the base plate, the support structure has two V-shaped support surfaces spaced apart along the longitudinal direction of the base plate, and the gear to be detected is installed on the rotating shaft so that the two ends of the rotating shaft can be overlapped and placed on the two V-shaped support surfaces; a mounting bracket is provided on the other side of the base plate, the mounting bracket includes a support block arranged vertically upward, and a driving gear is installed on the upper end of the support block so that the driving gear is meshed with the gear to be detected on the rotating shaft; a transverse guide structure is provided between the lower end of the mounting bracket and the base plate so that the mounting bracket and the driving gear can move horizontally along the base plate; a spring thrust structure is also provided on the base plate along the transverse direction of the base plate.

[0004] Both of the above patents use manual visual inspection of the dial indicator to check whether the runout value exceeds a fixed threshold value. However, manual visual reading is affected by many factors, such as vision, fatigue level, and light conditions. These factors may cause reading errors, affect data accuracy, and reduce detection efficiency. In addition, gears are allowed to have errors within a certain threshold range. The existing manual visual reading method requires constant attention to the dial indicator, and cannot distinguish whether the gear runout is within a certain threshold range in time, which is not convenient for rapid detection. Utility Model Content

[0005] The utility model aims to provide a gear runout detection tool, which has a simple structure and is easy to operate. The pressure sensor device is matched with a precision measuring instrument to improve the detection accuracy and detection efficiency.

[0006] The technical solution adopted to achieve the purpose of this utility model is:

[0007] A gear runout detection tool comprises a base plate and a gear detection assembly slidably arranged on the base plate, a support seat is arranged on one side of the gear detection assembly, and a precision measuring instrument and a pressure sensing device are arranged on the other side; the gear detection assembly can slide along the side where the precision measuring instrument and the pressure sensing device are located, and the gear detection assembly contacts the precision measuring instrument and the pressure sensing device when sliding.

[0008] Furthermore, a roller group for cooperating with the crankshaft is provided on the side of the support seat.

[0009] Furthermore, an assembly groove for assembling the support seat is provided on the base plate, and the shape of the assembly groove is a dovetail groove, a C-shaped groove or a T-shaped groove; a protrusion matching the shape of the assembly groove is provided at the bottom of the support seat.

[0010] Furthermore, it also includes a first fixing seat and a second fixing seat respectively used to fix the precision measuring instrument and the pressure sensor device, and the first fixing seat and the second fixing seat are both fixed on the base plate.

[0011] Furthermore, a slide rail is provided on the base plate, and the gear detection assembly is slidably connected to the base plate via the slide rail.

[0012] Furthermore, the gear detection assembly includes a mounting bracket and a standard gear, the mounting bracket is in a "Z" shape, and the lower horizontal portion of the "Z"-shaped mounting bracket is slidably connected to the slide rail through a slider, and the upper horizontal portion is mounted on the standard gear through a bearing;

[0013] The detection rod of the precision measuring instrument and the push rod in the pressure sensor device are both perpendicular to the axis of the upper horizontal part of the mounting bracket, and the distances between the detection rod and the push rod and the upper horizontal part of the mounting bracket are equal.

[0014] Furthermore, a third fixed seat is provided at the end of the slide rail close to the precision measuring instrument and the pressure sensing device, and a spring is fixedly connected between the third fixed seat and the lower horizontal part of the mounting bracket; a telescopic rod is provided inside the spring, and the two ends of the telescopic rod are respectively fixedly connected to the third fixed seat and the lower horizontal part of the mounting bracket.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model can preliminarily judge whether the gear runout test to be tested is qualified through the numerical value on the precision measuring instrument. The pressure sensor device detects the pressure and compares it with the fixed threshold value. If it exceeds the specified value, a buzzer alarm is triggered. The device is easy to operate as a whole, which can make the test results more accurate and reliable.

[0017] 2. The roller set in the utility model can make the rotation of the crankshaft smoother, and at the same time prevent the side of the gear to be tested from causing additional vibration during the rotation process, thereby affecting the test results.

[0018] 3. The support seat in the utility model cooperates with the assembly groove to facilitate the adjustment of the position of the support seat, thereby adjusting the specific position of the support seat on the crankshaft.

[0019] 4. The mounting bracket in the utility model is in a "Z" shape, which can ensure the stability of the structure without interfering with the normal operation of the precision measuring instrument and the pressure sensing device; and the equal distances between the detection rod and the push rod and the horizontal part of the upper end of the mounting bracket can ensure that the pressure generated by the gear detection component on the precision measuring instrument and the pressure sensing device is consistent, thereby improving the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a schematic diagram of the overall structure of the utility model from another perspective.

[0023] In the figure: 1. Base plate; 2. Gear detection assembly; 3. Support seat; 4. Precision measuring instrument; 5. Pressure sensing device; 6. Roller assembly; 7. Assembly slot; 8. First fixed seat; 9. Second fixed seat; 10. Slide rail; 11. Slider; 12. Contact bracket; 13. Detection rod; 14. Ejector rod; 15. Third fixed seat; 16. Spring; 17. Telescopic rod; 18. Gear to be detected;

[0024] 201. Mounting bracket; 202. Standard gear. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0026] like Figure 1 and Figure 2 As shown, a gear runout detection tool comprises a substrate 1 and a gear detection assembly 2 slidably arranged on the substrate 1, a support seat 3 is arranged on one side of the gear detection assembly 2, and a precision measuring instrument 4 and a pressure sensing device 5 are arranged on the other side; the gear detection assembly 2 can slide along the side where the precision measuring instrument 4 and the pressure sensing device 5 are located, and the gear detection assembly 2 contacts with the precision measuring instrument 4 and the pressure sensing device 5 when sliding.

[0027] The utility model is mainly used for the detection of gear runout on a crankshaft, and its working principle is similar to the principle disclosed in the publication number CN215810534U. The substrate 1 mainly plays a bearing role, and the various components in the utility model are integrated on the substrate 1 for easy handling. The support seat 3 is used to carry the crankshaft, and the number thereof is two or more, ensuring that at least one support seat 3 is supported at both ends of the crankshaft during detection. The top of the support seat 3 of the utility model is provided with a groove for placing the crankshaft, and the longitudinal section of the groove is trumpet-shaped, and the end with the larger opening of the trumpet-shaped groove is upward. The above-mentioned trumpet-shaped structure can facilitate the rapid placement of the crankshaft. The precision measuring instrument 4 is a dial indicator or a micrometer.

[0028] The gear detection assembly 2 is mainly used to mesh with the gear to be detected 18 on the crankshaft. In actual use, the crankshaft is first placed on the support seat 3, and the gear to be detected 18 is meshed with the standard gear 202 in the gear detection assembly 2, and then the gear to be detected 18 is rotated. If the gear to be detected 18 jumps during the rotation process, the standard gear 202 will drive the entire gear detection assembly 2 to slightly move along one side of the precision measuring instrument 4 and the pressure sensing device 5, and squeeze the corresponding structure on the precision measuring instrument 4 and the pressure sensing device 5.

[0029] During the test, the pressure sensing device 5 detects the pressure and compares it with the fixed threshold. If it exceeds the specified value, an alarm is triggered; if no alarm is received, it means that the gear adjustment is within the normal range. If you want more accurate accuracy, you can again use the value on the precision measuring instrument 4 to judge the degree of vibration detection of the gear 18 to be tested. When the pressure sensing device 5 is used in conjunction with the precision measuring instrument 4, there will be no alarm when the vibration does not exceed the fixed threshold. At this time, there is no need for manual meter reading, and it can quickly determine whether it is qualified, thereby improving the detection efficiency.

[0030] In one embodiment of the utility model, the pressure sensing device 5 is a pressure sensor with a push rod 14, and a communication module is provided on the pressure sensor, which can transmit data to an external controller after detecting the pressure. The external controller is also connected to an alarm device, such as a light alarm device or a buzzer. The external controller compares the pressure detected by the pressure sensing device 5 with a fixed threshold value, and triggers an alarm if it exceeds the specified value.

[0031] In another embodiment of the utility model, a pressure sensing system is integrated on the substrate 1. The system specifically includes a pressure sensing device 5, a controller and an alarm device. The alarm device is a light alarm device or a buzzer.

[0032] In the above two embodiments, the pressure is detected by the pressure sensing device 5, the controller organizes the data, and the coordination method of the alarm device is a mature coordination method in the prior art, such as the coordination method and principle of the safety alarm system of the pressure sensor disclosed in the patent with publication number CN111775866A.

[0033] like Figure 1 and Figure 2 As shown, a roller set 6 for cooperating with the crankshaft is provided on the side of the support seat 3. The roller set 6 in the utility model is arranged on the side close to the gear 18 to be detected. In actual operation, the roller set 6 contacts the side of the gear 18 to be detected, so that the rotation of the crankshaft is smoother, and at the same time, the extra jumping of the side of the gear 18 to be detected during the rotation process is prevented, which affects the test results. The roller set 6 includes two rollers, and the two rollers are connected by an arc-shaped connecting plate.

[0034] like Figure 1 and Figure 2 As shown, the base plate 1 is also provided with an assembly groove 7 for assembling the support seat 3, and the shape of the assembly groove 7 is a dovetail groove, a C-shaped groove or a T-shaped groove; the bottom of the support seat 3 is provided with a protrusion matching the shape of the assembly groove 7. The support seat 3 cooperates with the assembly groove 7 to facilitate the adjustment of the position of the support seat 3, so as to adjust the support seat 3 to a suitable position below the crankshaft.

[0035] like Figure 1 and Figure 2As shown, the first fixing seat 8 and the second fixing seat 9 are also included for fixing the precision measuring instrument 4 and the pressure sensor device 5 respectively, and the first fixing seat 8 and the second fixing seat 9 are both fixed on the substrate 1. The first fixing seat 8 and the second fixing seat 9 mainly play a fixing role, and the specific shapes can be adjusted according to actual needs.

[0036] like Figure 1 As shown, a slide rail 10 is also provided on the base plate 1, and the gear detection assembly 2 is slidably connected to the base plate 1 through the slide rail 10. The slide rail 10 is a common structure in the prior art. If the gear 18 to be detected jumps during the rotation process, the standard gear 202 will drive the entire gear detection assembly 2 to slide along one side of the precision measuring instrument 4 and the pressure sensor device 5 on the slide rail 10 to produce a slight displacement, and squeeze the corresponding structure on the precision measuring instrument 4 and the pressure sensor device 5. The number of the slide rails 10 is more than one, and can be selected according to actual needs.

[0037] like Figure 1 and Figure 2 As shown, the gear detection assembly 2 includes a mounting bracket 201 and a standard gear 202. The mounting bracket 201 is in a "Z" shape, and the lower horizontal portion of the "Z"-shaped mounting bracket 201 is slidably connected to the slide rail 10 through a slider 11, and the upper horizontal portion is mounted with the standard gear 202 through a bearing;

[0038] The lower horizontal portion of the mounting bracket 201 is also fixedly connected to an "L"-shaped contact bracket 12, the end of the transverse portion of the contact bracket 12 is fixedly connected to the lower horizontal portion of the mounting bracket 201, and the longitudinal portion of the contact bracket 12 is suspended;

[0039] The precision measuring instrument 4 corresponds to the upper horizontal part of the "Z"-shaped mounting bracket 201, the pressure sensing device 5 corresponds to the longitudinal part of the "L"-shaped contact bracket 12, and the distance from the detection rod 13 of the precision measuring instrument 4 to the mounting bracket 201 is equal to the distance from the top rod 14 in the pressure sensing device 5 to the contact bracket 12.

[0040] The mounting bracket 201 is in a "Z" shape and can be divided into two functional structures, namely, one part fixes the standard gear 202, and the other part is connected to the guide rail; the contact bracket 12 is only used to contact the precision measuring instrument 4, so as to transmit the pressure of the gear detection component 2 on the precision measuring instrument 4. The above structure can ensure the stability of the structure without interfering with the normal operation of the precision measuring instrument 4 and the pressure sensor device 5. The distance from the detection rod 13 of the precision measuring instrument 4 to the mounting bracket 201 is equal to the distance from the top rod 14 in the pressure sensor device 5 to the contact bracket 12, which can ensure that the pressure generated by the gear detection component 2 on the precision measuring instrument 4 and the pressure sensor device 5 is consistent, thereby improving the accuracy of the detection.

[0041] like Figure 1 As shown, a third fixed seat 15 is also provided at the end of the slide rail 10 near the precision measuring instrument 4 and the pressure sensing device 5, and a spring 16 is fixedly connected between the third fixed seat 15 and the lower horizontal portion of the mounting bracket 201; a telescopic rod 17 is provided inside the spring 16, and both ends of the telescopic rod 17 are respectively fixedly connected to the third fixed seat 15 and the lower horizontal portion of the mounting bracket 201.

[0042] The spring 16 mainly plays a reset role. When the standard gear 202 drives the entire gear detection assembly 2 to slide on the slide rail 10 along one side of the precision measuring instrument 4 and the pressure sensor device 5 to produce a slight displacement, the lower horizontal part of the mounting bracket 201 will squeeze the spring 16. After the detection is completed, the crankshaft is removed, and the spring 16 pushes the gear detection assembly 2 to reset.

[0043] The telescopic rod 17 mainly plays a guiding and supporting role to prevent the spring 16 from bending up and down during the compression process. The telescopic rod 17 of the utility model is a structure in which an inner tube and an outer tube are matched, and the inner tube and the outer tube are matched with a clearance, and the inner tube can slide freely in the outer tube, thereby realizing the telescopic function. One of the inner tube and the outer tube is fixed to the third fixing seat 15, and the other is fixed to the lower horizontal part of the mounting bracket 201.

[0044] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the scope of the utility model should be included in the protection scope of the utility model.

Claims

1. A gear runout detection tool, characterized in that: The invention comprises a base plate (1) and a gear detection assembly (2) slidably arranged on the base plate (1); a support seat (3) is arranged on one side of the gear detection assembly (2), and a precision measuring instrument (4) and a pressure sensing device (5) are arranged on the other side; the gear detection assembly (2) can slide along the side where the precision measuring instrument (4) and the pressure sensing device (5) are located, and when sliding, the gear detection assembly (2) contacts the precision measuring instrument (4) and the pressure sensing device (5).

2. The gear runout detection tool according to claim 1, characterized in that: A roller group (6) for cooperating with the crankshaft is provided on the side of the support seat (3).

3. The gear runout detection tool according to claim 1 or 2, characterized in that: The base plate (1) is also provided with an assembly groove (7) for assembling the support seat (3), and the assembly groove (7) is in the shape of a dovetail groove, a C-shaped groove or a T-shaped groove; the bottom of the support seat (3) is provided with a protrusion that matches the shape of the assembly groove (7).

4. The gear runout detection tool according to claim 1 or 2, characterized in that: It also comprises a first fixing seat (8) and a second fixing seat (9) for fixing the precision measuring instrument (4) and the pressure sensing device (5) respectively, and the first fixing seat (8) and the second fixing seat (9) are both fixed on the base plate (1).

5. The gear runout detection tool according to claim 3, characterized in that: It also comprises a first fixing seat (8) and a second fixing seat (9) for fixing the precision measuring instrument (4) and the pressure sensing device (5) respectively, and the first fixing seat (8) and the second fixing seat (9) are both fixed on the base plate (1).

6. The gear runout detection tool according to claim 1, 2 or 5, characterized in that: A slide rail (10) is also provided on the base plate (1), and the gear detection assembly (2) is slidably connected to the base plate (1) via the slide rail (10).

7. The gear runout detection tool according to claim 6, characterized in that: The gear detection assembly (2) comprises a mounting bracket (201) and a standard gear (202); the mounting bracket (201) is in a "Z" shape, and the lower horizontal portion of the "Z"-shaped mounting bracket (201) is slidably connected to the slide rail (10) via a slider (11), and the upper horizontal portion is mounted on the standard gear (202) via a bearing; The lower horizontal portion of the mounting bracket (201) is also fixedly connected to an "L"-shaped contact bracket (12), the end of the transverse portion of the contact bracket (12) is fixedly connected to the lower horizontal portion of the mounting bracket (201), and the longitudinal portion of the contact bracket (12) is suspended in the air; The precision measuring instrument (4) corresponds to the upper horizontal portion of the "Z"-shaped mounting bracket (201), the pressure sensing device (5) corresponds to the longitudinal portion of the "L"-shaped contact bracket (12), and the distance from the detection rod (13) of the precision measuring instrument (4) to the mounting bracket (201) is equal to the distance from the push rod (14) in the pressure sensing device (5) to the contact bracket (12).

8. The gear runout detection tool according to claim 7, characterized in that: A third fixed seat (15) is also provided at the end of the slide rail (10) near the precision measuring instrument (4) and the pressure sensor device (5), and a spring (16) is fixedly connected between the third fixed seat (15) and the lower horizontal portion of the mounting bracket (201); a telescopic rod (17) is provided inside the spring (16), and the two ends of the telescopic rod (17) are respectively fixedly connected to the third fixed seat (15) and the lower horizontal portion of the mounting bracket (201).

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