A device for detecting the coaxiality of drive shaft parts

Abstract

This utility model discloses a coaxiality testing device for drive shaft parts. The testing device includes a base, a support, a guide mechanism, a positioning mechanism, a motion mechanism, and a dial indicator. The support is located above the base; the guide mechanism is located above the support; the positioning mechanism is located above the guide and slides with the support through the guide; the part to be tested is placed above the positioning mechanism; the motion mechanism is located between the positioning mechanism and the support, and the dial indicator is connected below the motion mechanism; the motion mechanism includes a horizontal motion mechanism and a vertical motion mechanism from top to bottom. The coaxiality testing device for drive shaft parts provided by this utility model is easy to operate, has small measurement error, and the measurement results are not affected by parting line flash or burrs.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive parts testing equipment, and more specifically to a device for detecting the coaxiality of drive shaft parts. Background Technology

[0002] The manufacturing process for the shaft hub blank involves extruding it using two sets of molds, typically resulting in a small amount of flash or burrs along the parting line. The precision machining process for the shaft hub's end face and inner diameter involves using a chuck with three jaws to hold the outer blank surface and machine the end face and inner diameter. Inner diameter concentricity refers to whether the workpiece's inner diameter and the outer blank surface are on the same central axis. Traditionally, wall thickness difference testing is used, but this method is susceptible to measurement errors due to flash or burrs along the parting line.

[0003] In the prior art, such as the utility model application with application number 202123217687.9, a concentricity detection device for mechanical bearings is disclosed. This device uses a second motor, a second electric telescopic rod, and a third motor. Under the action of the second electric telescopic rod, the clamping block moves, thereby clamping and fixing mechanical bearings of different sizes in the storage cylinder. The second motor is turned on to drive the gear to rotate. As the gear rotates, the detection contact moves indirectly, so that the detection contact contacts the outer wall of the mechanical bearing. Under the action of the third motor, the storage cylinder rotates, and as the storage cylinder rotates, the mechanical bearing rotates, thereby realizing the concentricity detection. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a coaxiality detection device for drive shaft parts that is easy to operate, has small measurement error, and whose measurement results are not affected by the flash or burrs of the parting line.

[0005] The technical solution adopted by this utility model to solve the technical problem is: a coaxiality detection device for drive shaft parts, the detection device including a base, a support, a guide mechanism, a positioning mechanism, a motion mechanism and a dial indicator; the support is located above the base; the guide mechanism is located above the support; the positioning mechanism is located above the guide mechanism and slides with the support through the guide mechanism; the part to be detected is placed above the positioning mechanism; the motion mechanism is located between the positioning mechanism and the support, and the dial indicator is connected below the motion mechanism; the motion mechanism includes a horizontal motion mechanism and a vertical motion mechanism from top to bottom.

[0006] Furthermore, the horizontal motion mechanism includes a main moving body and a first powerful magnet. The bottom of the main moving body is provided with a blind hole, and the first powerful magnet is fixed in the blind hole.

[0007] Furthermore, the vertical motion mechanism includes a driven body and a second strong magnet, the second strong magnet being fixed above the driven body; an upward tilting structure is provided at the edge of the blind hole at the bottom of the main moving body, and a downward tilting structure is provided at the junction of the driven body and the main moving body; during the detection process, the upward tilting structure and the downward tilting structure move relative to each other.

[0008] Furthermore, the tilt angle range of both the upward tilting structure and the downward tilting structure is 30 to 60 degrees.

[0009] Furthermore, both the primary moving body and the secondary moving body are shaped like a combination of a frustum and a cylinder; specifically, the primary moving body and the secondary moving body are shaped like a combination of an upper frustum and a lower cylinder connected together. The volume of the primary moving body is larger than the volume of the secondary moving body.

[0010] Furthermore, the positioning mechanism includes a positioning plate, on which three V-shaped grooves are evenly formed; the positioning plate is connected to the guide mechanism by screws.

[0011] Furthermore, the guiding mechanism includes a guide post, a spring, and a linear bearing; the upper end of the guide post is connected to the positioning mechanism, and the lower end of the guide post passes through the linear bearing and is connected to the support seat; the spring is sleeved on the guide post and is disposed between the support seat and the positioning mechanism.

[0012] Furthermore, the support base is provided with a stepped hole for mounting the horizontal motion mechanism, and maintains an movable clearance with the main moving body to accommodate the workpiece concentricity error offset. The support base is provided with a through hole for mounting the vertical motion mechanism; the support base is also provided with a guide hole for connecting the guide mechanism.

[0013] Furthermore, a fixing block is provided below the through hole, and the measuring rod of the dial indicator is fixed by the fixing block. The measuring head of the dial indicator passes through the through hole and contacts the bottom of the vertical motion mechanism.

[0014] The beneficial effects of this utility model are as follows: Compared with the prior art, the coaxiality detection device for drive shaft parts provided by this utility model presses down on the workpiece to be tested, causing the chamfer of the workpiece's inner diameter to be close to the main moving body. The concentricity error of the shaft hub's inner diameter forces the main moving body to undergo horizontal displacement. Through the relative displacement of the up-and-down tilting structure, the horizontal displacement of the main moving body is converted into the vertical displacement of the driven body. The vertical displacement of the driven body is the concentricity error between the workpiece's inner diameter and the blank's outline, which is read as a dial indicator value variable. The detection device provided by this utility model is easy to operate, has a small measurement error, and the measurement results are not affected by the blank's parting line, flash, or burrs. Attached Figure Description

[0015] Figure 1 A schematic diagram of the detection device provided by this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the detection device provided by this utility model.

[0017] Figure 3 for Figure 2 A frontal view diagram.

[0018] Figure 4 for Figure 2 A top-down view diagram.

[0019] Figure 5 This is a schematic diagram of the positioning plate in the detection device.

[0020] Figure 6 This is a cross-sectional structural diagram of the support base in the testing device.

[0021] Figure 7 This is a cross-sectional schematic diagram of the horizontal motion mechanism in the detection device.

[0022] Figure 8 This is a cross-sectional schematic diagram of the vertical motion mechanism in the detection device.

[0023] Figure 9 This is a schematic diagram of the guiding mechanism in the detection device.

[0024] Among them, 1-workpiece to be measured; 2-positioning mechanism; 201-V-shaped groove; 202-positioning plate; 3-guide mechanism; 301-spring; 302-linear bearing; 303-guide post; 4-support base; 401-guide hole; 402-step hole; 403-through hole; 5-base; 6-dial indicator; 601-measuring head; 602-measuring rod; 603-fixed block; 7-horizontal motion mechanism; 701-main moving body; 702-first strong magnet; 703-blind hole; 704-upward tilting structure; 8-vertical motion mechanism; 801-second strong magnet; 802-following moving body; 803-downward tilting structure. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] Example like Figures 1 to 3As shown, a coaxiality detection device for drive shaft parts includes a base 5, a support 4, a guide mechanism 3, a positioning mechanism 2, a motion mechanism, and a dial indicator 6. The support 4 is located above the base 5. The guide mechanism 3 is located above the support 4. The positioning mechanism 2 is located above the guide mechanism 3 and slides with the support 4 through the guide mechanism 3. The part to be detected is placed above the positioning mechanism 2. The motion mechanism is located between the positioning mechanism 2 and the support 4, and the dial indicator 6 is connected below the motion mechanism. The motion mechanism includes a horizontal motion mechanism 7 and a vertical motion mechanism 8 from top to bottom.

[0027] like Figure 7 As shown, the horizontal motion mechanism 7 includes a main moving body 701 and a first strong magnet 702. A blind hole 703 is provided at the bottom of the main moving body 701, and the first strong magnet 702 is fixed within the blind hole 703. The vertical motion mechanism 8 includes a driven body 802 and a second strong magnet 801, with the second strong magnet 801 fixed above the driven body 802. An upwardly inclined structure 704 is provided at the edge of the blind hole 703 at the bottom of the main moving body 701. In this embodiment, the upwardly inclined structure 704 is a 1 / 4 arc surface structure. A downwardly inclined structure 803 is provided at the junction of the driven body 802 and the main moving body 701. In this embodiment, the downwardly inclined structure 803 is an inclined surface. During the inspection process, the workpiece to be inspected is pressed down, causing the horizontal motion mechanism 7 to displace horizontally. This horizontal displacement is transmitted to the vertical motion mechanism 8 via the relative movement between the upper inclined structure 704 and the lower inclined structure 803, causing the vertical motion mechanism 8 to displace vertically. During this movement, the 1 / 4 arc surface structure maintains point contact with the lower inclined structure 803 and moves relative to it. The amplitude of this relative movement varies according to the angle of the lower inclined structure 803 to improve inspection accuracy. The preferred inclination angle of the lower inclined structure 803 is 45 degrees. At this angle, the horizontal displacement of the main moving body 701 is transmitted to the vertical displacement in a 1:1 ratio. The vertical displacement represents the concentricity error between the workpiece's inner diameter and the blank contour. When the inclination angle is other values, conversion is required.

[0028] In one embodiment, both the main moving body 701 and the driven moving body 802 are truncated cone-cylindrical combinations; specifically, the main moving body 701 and the driven moving body 802 are combinations of an upper truncated cone and a lower cylinder connected together. The volume of the main moving body 701 is larger than the volume of the driven moving body 802. In this case, the downward tilting structure 803 is the side surface of the upper truncated cone of the driven moving body 802.

[0029] like Figure 5As shown, the positioning mechanism 2 includes a positioning plate 202, on which three V-shaped grooves 201 are evenly distributed; the positioning plate 202 is connected to the guide mechanism 3 by screws. The three V-shaped grooves 201 are used to position the three trunnions of the hub.

[0030] like Figure 3 and 8 As shown, the guiding mechanism 3 includes a guide post 303, a spring 301, and a linear bearing 302. The upper end of the guide post 303 is connected to the positioning mechanism 2, and the lower end of the guide post 303 passes through the linear bearing 302 and is connected to the support base 4. The spring 301 is sleeved on the guide post 303 and is positioned between the support base 4 and the positioning mechanism 2. Under the action of the spring 301, when the workpiece 1 to be measured on the positioning mechanism 2 is pressed down, the positioning mechanism 2 will move downward along the guide post 303 until the chamfer of the inner diameter of the workpiece 1 to be measured approaches the side of the frustum on the main moving body 701. After the workpiece is removed, under the reset action of the spring 301, the positioning mechanism 2 returns to its original position upward along the guide post 303. like Figure 6 As shown, the support base 4 is provided with a stepped hole 402 for installing the horizontal motion mechanism 7, and the main moving body 701 of the horizontal motion mechanism 7 is disposed on the stepped hole 402; the support base 4 is provided with a through hole 403 for installing the vertical motion mechanism 8, and the vertical motion mechanism 8 can move vertically within the through hole 403; the support base 4 is also provided with a guide hole 401 for connecting the guide mechanism 3. In this embodiment, there are three guide holes 401, which are respectively connected to three guide mechanisms 3, and the linear bearing 302 of the guide mechanism 3 is installed in the guide hole 401.

[0031] like Figure 3 As shown, a fixing block 603 is provided below the through hole 403. The measuring rod 602 of the dial indicator 6 is fixed by the fixing block 603. The measuring head 601 of the dial indicator 6 passes through the through hole 403 and contacts the bottom of the vertical motion mechanism 8. When the vertical motion mechanism 8 moves downward, the measuring head 601 in contact with its bottom is pressed and can display a reading on the dial indicator 6.

[0032] The working principle of the above-mentioned detection device is as follows: By pressing down on the workpiece 1 to be tested, the chamfer of the inner diameter of the workpiece is brought close to the main moving body 701, and the concentricity error of the inner diameter of the hub forces the main moving body 701 to undergo horizontal displacement; through the relative displacement of the upper and lower inclined structures 803, the horizontal displacement of the main moving body 701 is converted into the vertical displacement of the driven moving body 802. The vertical displacement of the driven moving body 802 is the concentricity error between the inner diameter of the workpiece and the blank outline. The vertical displacement acts on the measuring head 601 of the dial indicator 6 and is read as a variable value of the dial indicator 6.

[0033] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A device for detecting the coaxiality of a drive shaft part, characterized in that: The testing device includes a base, a support, a guide mechanism, a positioning mechanism, a motion mechanism, and a dial indicator; the support is located above the base; the guide mechanism is located above the support; the positioning mechanism is located above the guide and slides with the support via the guide; the part to be tested is placed above the positioning mechanism; the motion mechanism is located between the positioning mechanism and the support, and the dial indicator is connected below the motion mechanism; the motion mechanism includes a horizontal motion mechanism and a vertical motion mechanism from top to bottom.

2. The coaxiality detection device for drive shaft parts as described in claim 1, characterized in that: The horizontal motion mechanism includes a main moving body and a first strong magnet. The bottom of the main moving body has a blind hole, and the first strong magnet is fixed in the blind hole.

3. A drive shaft component concentricity inspection apparatus as claimed in claim 2, characterised in that: The vertical motion mechanism includes a driven body and a second strong magnet, the second strong magnet being fixed above the driven body; an upward tilting structure is provided at the edge of the blind hole at the bottom of the main moving body, and a downward tilting structure is provided at the junction of the driven body and the main moving body; during the detection process, the upward tilting structure and the downward tilting structure move relative to each other.

4. A drive shaft component concentricity inspection apparatus as claimed in claim 3, characterized in that: The tilt angles of both the upward and downward tilting structures range from 30 to 60 degrees.

5. A drive shaft component concentricity inspection apparatus as claimed in claim 3, characterized in that: Both the primary moving body and the secondary moving body are shaped like a combination of a frustum and a cylinder; the volume of the primary moving body is greater than the volume of the secondary moving body.

6. A drive shaft component concentricity inspection apparatus as claimed in claim 1, characterized in that: The positioning mechanism includes a positioning plate, on which three V-shaped grooves are evenly distributed; the positioning plate is connected to the guide mechanism by screws.

7. A drive shaft component concentricity inspection apparatus as claimed in claim 1, characterized in that: The guiding mechanism includes a guide post, a spring, and a linear bearing; the upper end of the guide post is connected to the positioning mechanism, and the lower end of the guide post passes through the linear bearing and is connected to the support base; the spring is sleeved on the guide post and is located between the support base and the positioning mechanism.

8. A drive shaft component concentricity inspection apparatus as claimed in claim 1, characterized in that: The support base is provided with a stepped hole for installing the horizontal motion mechanism, and a through hole for installing the vertical motion mechanism; the support base is also provided with a guide hole for connecting the guide mechanism.

9. A drive shaft component concentricity checking device as claimed in claim 8, characterised in that: A fixing block is provided below the through hole, and the measuring rod of the dial indicator is fixed by the fixing block. The measuring head of the dial indicator passes through the through hole and contacts the bottom of the vertical motion mechanism.

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