Single-tooth strength detection tool for gear

Abstract

The utility model provides a gear single tooth strength detection tool, which comprises a base, an involute tooth-shaped groove and a guide groove, the involute tooth-shaped groove and the guide groove are arranged on the base, the involute tooth-shaped groove is used for positioning and placing a tooth part of a gear to be detected, the guide groove is communicated with the involute tooth-shaped groove in the radial direction, and a pressing block is installed in the guide groove in a sliding mode. An embedding groove axially communicated with the involute tooth-shaped groove is formed in the rear end of the base, a fixed seat is embedded in the embedding groove, a placing hole for positioning and placing the shaft part of the gear to be detected is formed in the fixed seat, and the placing hole is axially communicated with the involute tooth-shaped groove. The gear detection tool is suitable for detection of a gear with a shaft part, and is convenient to use and firm in clamping.

Description

Technical Field

[0001] The utility model relates to the technical field of gear detection devices, and more specifically, to a single-tooth strength detection tooling for gears. Background Art

[0002] With the continuous development of modern technology, automobile seats are constantly evolving towards intelligence and user-friendliness. Many automobiles are equipped with electric seats, which can provide a comfortable and fatigue-free driving and riding experience for drivers and passengers. The system of an electric seat usually consists of a bidirectional motor, a transmission device, a seat adjuster, etc. The seat adjuster includes a gear unit, and power transmission is achieved through the mutual meshing between the rims. As a key component, the quality of the gears of the seat adjuster is crucial for the service life of the electric seat and the personal safety of the passengers.

[0003] To ensure safety, it is necessary to test the single-tooth strength of the external teeth of each batch of gears. However, the existing detection tooling is only applicable to the detection of ordinary gears, and for gears with special shapes, such as Figure 1 the structure shown, there is a lack of suitable detection tooling on the market. This special-shaped gear includes a head 91, a connecting portion 92, a tooth portion 93, and a shaft portion 94 arranged in sequence from front to back. The four are coaxially and fixedly connected to form an integral structure. The tooth portion 93 has a plurality of external teeth 931 evenly distributed in the circumferential direction and tooth surfaces 932 inclined on both sides of the external teeth 931. When the existing detection tooling detects this special-shaped gear, the following problems exist: (1) The shaft portion cannot be placed: Due to the special structure of the gear, the existing detection tooling cannot place its shaft portion, resulting in inaccurate clamping and testing; (2) The gear to be tested is not firmly clamped: Even if the shaft portion can be placed, the existing tooling cannot firmly clamp the special-shaped gear, resulting in a reduction in the accuracy of the test results and even potential safety risks.

[0004] Therefore, designing a new type of detection fixture that is easy to use and firmly clamps is crucial for ensuring the safety of automobile seats. Summary of the Utility Model

[0005] The purpose of the present utility model is to solve the defects in the prior art and provide a single-tooth strength detection tooling for gears that is applicable to the detection of gears with a shaft portion, easy to use, and firmly clamps.

[0006] To solve the above problems, the present utility model provides a gear single-tooth strength detection tooling, which includes a base, an involute tooth profile groove and a guide groove opened on the base. The involute tooth profile groove is used for positioning and placing the tooth part of the gear to be tested. The guide groove is radially communicated with the involute tooth profile groove, and a pressing block is slidably installed in the guide groove. An embedding groove axially communicated with the involute tooth profile groove is opened at the rear end of the base, and a fixing seat is embedded and installed in the embedding groove. A placing hole for positioning and placing the shaft part of the gear to be tested is opened on the fixing seat, and the placing hole is axially communicated with the involute tooth profile groove.

[0007] Compared with the prior art, the beneficial effects of the present utility model are as follows: The detection tooling positions the shaft part of the gear to be tested through the fixing seat, solving the problem that the shaft part cannot be placed in the prior art. At the same time, due to the setting of the fixing seat, when the pressing block is pressed down, the placing hole on the fixing seat and the involute tooth profile groove can form multi-point fixation for the gear to be tested together, making it more stable, thereby improving the accuracy and safety of the detection. In addition, the split structure design of the base and the fixing seat is more conducive to machining an involute positioning groove that conforms to the gear shape on the base, facilitating the processing and manufacturing of the tooling.

[0008] As an improvement, the front end of the fixing seat is contracted towards the center to form a plug-in portion, and the placing hole is opened on the plug-in portion. A first placing groove for accommodating the plug-in portion is provided on the base, and the first placing groove is communicated between the embedding groove and the involute tooth profile groove. This structure realizes a more stable connection between the fixing seat and the base by setting a plug-in portion at the front end of the fixing seat and connecting it with the first placing groove on the base, effectively preventing the fixing seat from loosening or shifting during use, thereby improving the stability and reliability of the detection tooling.

[0009] As an improvement, a second placing groove for positioning and placing the connecting portion of the gear to be tested is opened at the front end of the base. The second placing groove is located outside the involute tooth profile groove and is axially communicated with the involute tooth profile groove. This improved design not only adapts to the connecting portion structure of the gear to be tested by setting a second placing groove at the front end of the base and axially communicating it with the involute tooth profile groove, but also increases the contact surface with the gear to be tested, making the gear to be tested more firmly fixed during the detection process, effectively improving the accuracy and reliability of the detection result.

[0010] As an improvement, the lower end of the pressing block has an inclined surface, and the inclined surface is used for pressing and fitting with the tooth surface of the gear to be tested. This improved design sets an inclined surface at the lower end of the pressing block, and the inclined surface contacts and cooperates with the tooth surface of the gear to be tested. Under load, it can make the gear evenly stressed, effectively avoiding local concentrated stress between the pressing block and the gear, thereby improving the accuracy and repeatability of the single-tooth crushing test and facilitating the determination of the single-tooth compressive strength.

[0011] As an improvement, one side of the briquette has an anti-misalignment protrusion, and an anti-misalignment groove corresponding to the anti-misalignment protrusion is provided in the guiding groove. This improved design realizes the precise positioning of the briquette in the guiding groove by setting an anti-misalignment protrusion on one side of the briquette and a corresponding anti-misalignment groove in the guiding groove, effectively preventing misinstallation of the briquette during the installation process, and improving the assembly efficiency and reliability of the detection tooling. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of a gear to be measured in the prior art;

[0013] Figure 2 is a schematic diagram of the overall structure of the present invention;

[0014] Figure 3 is Figure 2 a sectional view taken along line A-A in

[0015] Figure 4 is the first exploded view of the present invention;

[0016] Figure 5 is the second exploded view of the present invention.

[0017] Description of the Reference Numerals:

[0018] 1, base; 10, involute tooth profile groove; 11, guiding groove; 110, anti-misalignment groove; 12, embedding groove; 2, briquette; 20, inclined surface; 21, anti-misalignment protrusion; 3, fixing seat; 30, placing hole; 31, inserting portion; 41, first placing groove; 42, second placing groove. Detailed Description of the Embodiments

[0019] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0020] As Figure 2 and Figure 3 shown, in the present invention, the gear single-tooth strength detection tooling includes a base 1 and an involute tooth profile groove 10 and a guiding groove 11 opened on the base 1. The involute tooth profile groove 10 is used to position and place the tooth part of the gear to be measured. The guiding groove 11 is radially communicated with the involute tooth profile groove 10, and a briquette 2 is slidably installed in the guiding groove 11. An embedding groove 12 axially communicated with the involute tooth profile groove 10 is opened at the rear end of the base 1, and a fixing seat 3 is embedded and installed in the embedding groove 12. A placing hole 30 for positioning and placing the shaft part of the gear to be measured is opened on the fixing seat 3, and the placing hole 30 is axially communicated with the involute tooth profile groove 10.

[0021] This detection tooling positions the shaft portion of the gear to be measured through the fixing base 3, solving the problem in the prior art that the shaft portion cannot be placed. At the same time, due to the setting of the fixing base 3, when the pressing block 2 presses down, the placing hole 30 on the fixing base 3 can, together with the involute tooth profile groove 10, form multi-point fixation for the gear to be measured, making it more stable, thereby improving the accuracy and safety of the detection. In addition, the split structure design of the base 1 and the fixing base 3 is more conducive to machining an involute positioning groove conforming to the gear shape on the base 1, facilitating the machining and manufacturing of the tooling.

[0022] As Figures 3 to 5 shown, the front end of the fixing base 3 shrinks towards the center to form a plug-in portion 31, the placing hole 30 is opened on the plug-in portion 31, and the base 1 is provided with a first placing groove 41 for accommodating the plug-in portion 31. The first placing groove 41 communicates between the embedded groove 12 and the involute tooth profile groove 10. This structure realizes a more stable connection between the fixing base 3 and the base 1 by setting the plug-in portion 31 at the front end of the fixing base 3 and connecting it with the first placing groove 41 on the base 1, effectively preventing the fixing base 3 from loosening or shifting during use, thereby improving the stability and reliability of the detection tooling.

[0023] As Figure 3 and Figure 5 shown, the front end of the base 1 is provided with a second placing groove 42 for positioning and placing the connecting portion of the gear to be measured. The second placing groove 42 is located outside the involute tooth profile groove 10 and axially communicates with the involute tooth profile groove 10. This improved design not only adapts to the connecting portion structure of the gear to be measured by setting the second placing groove 42 at the front end of the base 1 and axially connecting it with the involute tooth profile groove 10, but also increases the contact surface with the gear to be measured, making the gear to be measured more firmly fixed during the detection process, effectively improving the accuracy and reliability of the detection result.

[0024] As Figure 4 or Figure 5 shown, the lower end of the pressing block 2 has an inclined surface 20, and the inclined surface 20 is used for pressing and fitting with the tooth surface of the gear to be measured. This improved design realizes that the inclined surface 20 provided at the lower end of the pressing block 2 contacts and cooperates with the tooth surface of the gear to be measured, enabling the gear to be evenly pressed under load, effectively avoiding local concentrated stress between the pressing block 2 and the gear, thereby improving the accuracy and repeatability of the single-tooth crushing test and facilitating the determination of the single-tooth compressive strength.

[0025] As Figure 4 or Figure 5As shown in the figure, one side of the briquetting block 2 has an anti-misalignment protrusion 21, and an anti-misalignment groove 110 corresponding to the anti-misalignment protrusion 21 is provided in the guiding groove 11. Through the improvement design of setting the anti-misalignment protrusion 21 on one side of the briquetting block 2 and setting the corresponding anti-misalignment groove 110 in the guiding groove 11, the precise positioning of the briquetting block 2 in the guiding groove 11 is realized, effectively preventing the misinstallation of the briquetting block 2 during the installation process, and improving the assembly efficiency and reliability of the detection tooling.

[0026] When the utility model is in use, the operation steps are as follows:

[0027] Step 1: Install the gear into the base 1, ensure that the connecting part of the gear is placed in the second placement groove 42 of the base 1, and the tooth part of the gear is placed in the involute tooth profile groove 10 of the base 1;

[0028] Step 2: Install the fixing seat 3 into the embedding groove 12 of the base 1, ensure that the plug-in part 31 of the fixing seat 3 is inserted into the first placement groove 41 of the base 1, and at the same time ensure that the placement hole 30 of the fixing seat 3 is clamped on the shaft part of the gear, and use bolts to fixedly connect the fixing seat 3 and the base 1 together;

[0029] Step 3: Insert the briquetting block 2 into the involute tooth profile groove 10 through the guiding groove 11 of the base 1, so that the inclined surface 20 of the briquetting block 2 is pressed against the tooth surface of the gear;

[0030] Step 4: Place the base 1 equipped with the gear on the test bench of the pressure testing machine, and then apply a downward pressure to the briquetting block 2 through the pressure testing machine until a single tooth of the gear is crushed, and read the test data.

[0031] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A single-tooth strength testing tool for gears, comprising a base (1) and an involute tooth profile groove (10) and a guide groove (11) provided on the base (1), wherein the involute tooth profile groove (10) is used to position and place a tooth portion of a gear to be tested, the guide groove (11) is radially connected to the involute tooth profile groove (10), and a pressure block (2) is slidably installed in the guide groove (11), characterized in that: The rear end of the base (1) is provided with an embedding groove (12) which is axially connected to the involute tooth-shaped groove (10); a fixing seat (3) is embedded in the embedding groove (12); the fixing seat (3) is provided with a placement hole (30) for positioning and placing the shaft of the gear to be tested; the placement hole (30) is axially connected to the involute tooth-shaped groove (10).

2. The single tooth strength testing tool for gear according to claim 1 is characterized in that: The front end of the fixing seat (3) shrinks toward the center to form an inserting portion (31), the placement hole (30) is provided on the inserting portion (31), and the base (1) is provided with a first placement groove (41) for accommodating the inserting portion (31), and the first placement groove (41) is connected between the embedding groove (12) and the involute tooth groove (10).

3. The single tooth strength testing tool for gear according to claim 2 is characterized in that: The front end of the base (1) is provided with a second placement groove (42) for positioning and placing the connecting portion of the gear to be tested, the second placement groove (42) being located outside the involute tooth profile groove (10) and axially connected to the involute tooth profile groove (10).

4. The single tooth strength testing tool for gear according to claim 1 is characterized in that: The lower end of the pressing block (2) has an inclined surface (20), and the inclined surface (20) is used for pressing with the tooth surface of the gear to be tested.

5. The single tooth strength testing tool for gears according to claim 4 is characterized in that: One side of the pressing block (2) is provided with an anti-error protrusion (21), and the guide groove (11) is provided with an anti-error groove (110) corresponding to the anti-error protrusion (21).

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