A device for detecting roundness of inner side of a shaft sleeve

Abstract

The utility model provides a device for detecting the roundness of the inner side of a sleeve, which belongs to the technical field of sleeve production, and is used to solve the technical problem that the existing detection of the roundness of the inner side of the sleeve is inaccurate when the sleeve is clamped from the outside. It includes a base, a vertical rod is fixed on the base, a mounting plate is fixed on the vertical rod, two horizontal grooves are provided on the mounting plate, two support rods are slidably arranged in the horizontal grooves, a pipe sleeve is provided on the rotating sleeve of the support rod, an adjustment mechanism is provided between the two support rods, a rotating mechanism is provided on the upper end of the mounting plate, a mounting rod is fixed on the vertical rod, a micrometer is fixed on the mounting rod, a horizontal rod is fixed on the probe of the micrometer, a long notch is provided on the vertical rod and the mounting plate, and a thimble is fixed on the other end of the horizontal rod; the device for detecting the roundness of the inner side of the sleeve can position the sleeve from the inside of the sleeve, and drive the sleeve to rotate along the axis of the inner wall, so as to prevent the influence of the outer side of the sleeve and the sleeve wall thickness on the inner roundness detection, and improve the detection accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of shaft sleeve production and relates to a shaft sleeve inner side roundness detection device. Background Art

[0002] In moving parts, parts wear due to long-term friction. When the wear between the shaft and the hole reaches a certain level, the parts must be replaced. Therefore, designers choose materials with lower hardness and better wear resistance as sleeves or bushings during design. This can reduce the wear of the shaft and seat. When the sleeves or bushings are worn to a certain extent, they can be replaced, which can save the cost of replacing the sleeves or seats.

[0003] After the production of the sleeve is completed, some products need to be extracted for inner roundness inspection to ensure product quality. When performing the inner roundness inspection, the sleeve needs to be clamped from the outside with a fixture, and the probe of the micrometer is placed on the inside of the sleeve. Then the fixture is rotated to drive the sleeve to rotate and perform roundness inspection. However, the fixture clamps the sleeve from the outside. The roundness of the outer side of the sleeve and the thickness of the sleeve will affect the inspection results, resulting in inaccurate inspection results.

[0004] Based on this, we designed a device for detecting the roundness of the inner side of the sleeve. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a device for detecting the inner roundness of a sleeve. The technical problem to be solved by the device is: how to position the inner side of the sleeve during inner roundness detection to improve detection accuracy.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A device for detecting the roundness of the inner side of a sleeve comprises a base, a vertical rod is fixed on the base, a mounting plate is fixed on the vertical rod, two symmetrically distributed transverse grooves are provided on both sides of the mounting plate, two support rods are slidably arranged in the transverse grooves, and a rotating sleeve on the support rod is provided with a pipe sleeve for placing the sleeve, an adjustment mechanism is provided between the two support rods, a rotating mechanism for driving the sleeve to rotate is provided at the upper end of the mounting plate, and the rotating mechanism is located directly above the two support rods, a mounting rod is fixed on the vertical rod, a micrometer is fixed on the mounting rod, a transverse rod is fixed on the probe of the micrometer, long slots are provided on the vertical rod and the mounting plate, and the transverse rod passes through the long slot, and a thimble is fixed on the other end of the transverse rod.

[0008] The adjustment mechanism includes an adjustment rod fixed on the support rod, and a positioning ring is fixed on the end of the adjustment rod, a positioning groove with openings on both sides is opened on the vertical rod, and a plurality of positioning holes distributed at equal intervals are opened on the vertical rod, two positioning rings are aligned with one of the positioning holes, and a positioning pin is inserted in the positioning hole.

[0009] With the above structure, the operator can pull out the positioning pin, then adjust the positioning ring to align with different positioning holes, and then insert the positioning pin to adjust the height of the positioning ring, so that the support rod can be fixed at different positions of the transverse groove through the adjusting rod, and the two support rods can be symmetrically distributed. When the inner diameter of the sleeve is small, the distance between the two support rods is shortened so that the sleeve can be sleeved on the outside of the two support rods. When the inner diameter of the sleeve is large, the distance between the two support rods is enlarged to improve the support stability.

[0010] The rotating mechanism includes a lifting slider, a vertical groove is opened on the mounting plate, the lifting slider is slidably arranged in the vertical groove, a rotating rod is rotatably arranged in the middle of the lifting slider, a rotating wheel disc and a rotating sleeve are respectively fixed at both ends of the rotating rod, the rotating sleeve is located directly above the two support rods, and a pressure spring is fixed to the lifting slider, and the upper end of the pressure spring is against the inner wall of the vertical groove.

[0011] With the above structure, when in use, the operator can push the lifting slider upward, and then set the sleeve on the two support rods and abut against the pipe sleeve. Under the action of the pressure spring, the lifting slider is pressed downward, so that the outer side of the rotating sleeve abuts against the top of the sleeve. Then the operator rotates the rotating wheel, and the friction between the rotating sleeve and the sleeve can drive the sleeve to rotate, so that the end of the ejector pin slides along the inner side of the sleeve. The inner roundness detection can be achieved by observing the jump of the micrometer pointer. Moreover, the rotating sleeve is always located directly above the sleeve, which will not cause the sleeve to be skewed, and the detection result is more accurate.

[0012] The length of the rotating sleeve is greater than the length of the supporting rod, and an embedding groove is provided on the outer side of the rotating sleeve, and an anti-slip ring is fixed in the embedding groove.

[0013] With the above structure, when inserting the shaft sleeve, the rotating sleeve can be squeezed upward through the shaft sleeve, and then the shaft sleeve can be moved laterally and sleeved on the support rod. The operator does not need to lift the lifting slider upward separately, which makes the operation more convenient. In addition, the anti-slip ring directly contacts the shaft sleeve during use, which can prevent slipping and improve the smoothness of use.

[0014] The ejector pin is provided with a thread groove, a fixing ring is arranged at one end of the cross bar away from the dial gauge probe, and the ejector pin passes through the fixing ring. Two fixing nuts are threadedly connected to the ejector pin, and the two fixing nuts are respectively pressed against two sides of the fixing ring.

[0015] With the above structure, when testing sleeves with different inner diameters, the operator can adjust the height of the ejector pin by fixing the nut so that the end of the ejector pin can just abut against the inner side of the sleeve, thereby expanding the application range of the device.

[0016] Compared with the prior art, the present sleeve inner roundness detection device has the following advantages:

[0017] 1. Through the support rod, rotating mechanism, micrometer and ejector, the sleeve can be positioned from the inside of the sleeve and driven to rotate along the axis of the inner wall, which can prevent the influence of the outer side of the sleeve and the thickness of the sleeve wall on the inner roundness detection and improve the detection accuracy.

[0018] 2. The distance between the two support rods can be adjusted through the adjustment mechanism, thereby improving the support stability of the device for a large inner diameter sleeve, and being applicable to a small inner diameter sleeve, thereby improving the stability of the device and expanding the scope of application of the device.

[0019] 3. The height of the ejector pin can be adjusted through the ejector pin and the fixing nut. When detecting sleeves with different inner diameters, the ejector pin can be pressed against the inner side of the sleeve, further expanding the application scope of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the other side of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the adjustment mechanism in the utility model;

[0023] Figure 4 It is a schematic diagram of the split structure of the adjustment mechanism in the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the ejector pin in the utility model;

[0025] Figure 6 It is a structural schematic diagram of the rotating mechanism in the utility model.

[0026] In the figure: 1. base; 2. vertical rod; 3. mounting plate; 4. horizontal groove; 5. support rod; 6. pipe sleeve; 7. adjustment mechanism; 701. adjustment rod; 702. positioning ring; 703. positioning groove; 704. positioning hole; 705. positioning pin; 8. rotating mechanism; 801. vertical groove; 802. lifting slider; 803. rotating rod; 804. rotating sleeve; 805. rotating wheel; 806. pressure spring; 807. anti-slip ring; 9. mounting rod; 10. micrometer; 11. horizontal rod; 12. ejector pin; 13. long notch; 14. fixing nut. DETAILED DESCRIPTION

[0027] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0030] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0031] See also Figure 1-6 The present embodiment provides a device for detecting the roundness of the inner side of a sleeve, comprising a base 1, a vertical rod 2 is fixed on the base 1, a mounting plate 3 is fixed on the vertical rod 2, two symmetrically distributed transverse grooves 4 are provided on both sides of the mounting plate 3, two support rods 5 are slidably arranged in the transverse grooves 4, and a pipe sleeve 6 for placing the sleeve is rotatably sleeved on the support rod 5, an adjustment mechanism 7 is provided between the two support rods 5, a rotating mechanism 8 for driving the sleeve to rotate is provided at the upper end of the mounting plate 3, and the rotating mechanism 8 is located directly above the two support rods 5, a mounting rod 9 is fixed on the vertical rod 2, a micrometer 10 is fixed on the mounting rod 9, a transverse rod 11 is fixed on the probe of the micrometer 10, a long slot 13 is provided on the vertical rod 2 and the mounting plate 3, and the transverse rod 11 passes through the long slot 13, and a thimble 12 is fixed on the other end of the transverse rod 11.

[0032] The adjusting mechanism 7 comprises an adjusting rod 701 fixed on the supporting rod 5, and a positioning ring 702 is fixed on the end of the adjusting rod 701, a positioning groove 703 with openings on both sides is provided on the vertical rod 2, and a plurality of positioning holes 704 distributed at equal intervals are provided on the vertical rod 2, two positioning rings 702 are aligned with one of the positioning holes 704, and a positioning pin 705 is inserted in the positioning hole 704; the operator can pull out the positioning pin 705, and then adjust the positioning ring 702 to align with different positioning holes 704, and then insert the positioning pin 705 to adjust the height of the positioning ring 702, so that the supporting rod 5 can be fixed at different positions of the transverse groove 4 through the adjusting rod 701, and the two supporting rods 5 can be symmetrically distributed. When the inner diameter of the sleeve is small, the distance between the two supporting rods 5 is reduced so that the sleeve can be sleeved on the outside of the two supporting rods 5. When the inner diameter of the sleeve is large, the distance between the two supporting rods 5 is expanded to improve the supporting stability.

[0033] The rotating mechanism 8 includes a lifting slider 802, a vertical slot 801 is provided on the mounting plate 3, the lifting slider 802 is slidably arranged in the vertical slot 801, a rotating rod 803 is rotatably arranged in the middle of the lifting slider 802, a rotating wheel 805 and a rotating sleeve 804 are respectively fixed at both ends of the rotating rod 803, the rotating sleeve 804 is located directly above the two supporting rods 5, the lifting slider 802 is fixed with a pressure spring 806, and the upper end of the pressure spring 806 is against the inner wall of the vertical slot 801; when in use, the operator can push the lifting slider 802 upwards, and then The sleeve is arranged on two supporting rods 5 and is against the pipe sleeve 6. Under the action of the pressure spring 806, the lifting slider 802 is pressed downward, so that the outer side of the rotating sleeve 804 is against the top of the sleeve. Then the operator rotates the rotating wheel 805. The friction between the rotating sleeve 804 and the sleeve can drive the sleeve to rotate, so that the end of the ejector pin 12 slides along the inner side of the sleeve. The inner roundness detection can be realized by observing the pointer jump of the micrometer 10. Moreover, the rotating sleeve 804 is always located directly above the sleeve, which will not cause the sleeve to be skewed, and the detection result is more accurate.

[0034] The length of the rotating sleeve 804 is greater than that of the support rod 5, and an embedding groove is opened on the outer side of the rotating sleeve 804, in which an anti-skid ring 807 is fixed; when inserting the shaft sleeve, the rotating sleeve 804 can be squeezed upward through the shaft sleeve, and then the shaft sleeve can be moved horizontally and sleeved on the support rod 5. The operator does not need to lift the lifting slider 802 upward separately, which makes the operation more convenient. Moreover, when in use, the anti-skid ring 807 directly contacts the shaft sleeve, which can prevent slipping and improve the smoothness of use.

[0035] A threaded groove is provided on the ejector pin 12, and a fixing ring is provided at one end of the cross bar 11 away from the probe of the micrometer 10, and the ejector pin 12 passes through the fixing ring. Two fixing nuts 14 are threadedly connected to the ejector pin 12, and the two fixing nuts 14 are respectively pressed against the two sides of the fixing ring; when detecting sleeves with different inner diameters, the operator can adjust the height of the ejector pin 12 through the fixing nuts 14 so that the end of the ejector pin 12 can just press against the inner side of the sleeve, thereby expanding the application range of the device.

[0036] In this embodiment, the above fixing methods are the most commonly used fixing connection methods in the art, such as welding, bolt connection, etc.

[0037] The working principle of this utility model:

[0038] When in use, the operator can press the rotating sleeve 804 upward through the sleeve, then move the sleeve horizontally and sleeve it on the support rod 5. After loosening the sleeve, under the action of the pressure spring 806, the lifting slider 802 is pressed downward, so that the anti-skid ring 807 is against the top of the sleeve, and the sleeve is pressed on the two support rods 5 and against the pipe sleeve 6. At this time, the end of the ejector pin 12 is against the inside of the sleeve. Then the operator rotates the rotating wheel 805, and the friction between the anti-skid ring 807 and the sleeve can drive the sleeve to rotate, so that the end of the ejector pin 12 slides along the inside of the sleeve. The inner roundness detection can be realized by observing the pointer jump of the micrometer 10. In addition, when detecting sleeves with different inner diameters, the operator The operator can pull out the positioning pin 705, then adjust the positioning ring 702 to align with different positioning holes 704, and then insert the positioning pin 705 to adjust the height of the positioning ring 702, so that the support rod 5 can be fixed at different positions of the transverse groove 4 through the adjusting rod 701, and the two support rods 5 can be symmetrically distributed. When the inner diameter of the sleeve is small, the distance between the two support rods 5 is reduced so that the sleeve can be sleeved on the outside of the two support rods 5. When the inner diameter of the sleeve is large, the distance between the two support rods 5 is expanded to improve the support stability. In addition, the height of the ejector pin 12 can be adjusted by the fixing nut 14 so that the end of the ejector pin 12 can just abut against the inner side of the sleeve, thereby expanding the application range of the device.

[0039] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A device for detecting the roundness of the inner side of a sleeve, comprising a base (1), characterized in that: A vertical rod (2) is fixed on the base (1), a mounting plate (3) is fixed on the vertical rod (2), two symmetrically distributed transverse grooves (4) are provided on both sides of the mounting plate (3), two support rods (5) are slidably arranged in the transverse grooves (4), and a pipe sleeve (6) for placing a shaft sleeve is rotatably sleeved on the support rod (5), an adjustment mechanism (7) is provided between the two support rods (5), a rotating mechanism (8) for driving the shaft sleeve to rotate is provided at the upper end of the mounting plate (3), and the rotating mechanism (8) is located directly above the two support rods (5), a mounting rod (9) is fixed on the vertical rod (2), a micrometer (10) is fixed on the mounting rod (9), a transverse rod (11) is fixed on the measuring head of the micrometer (10), a long slot (13) is provided on the vertical rod (2) and the mounting plate (3), and the transverse rod (11) passes through the long slot (13), and a thimble (12) is fixed on the other end of the transverse rod (11).

2. A sleeve inner roundness detection device according to claim 1, characterized in that: The adjustment mechanism (7) comprises an adjustment rod (701) fixed on the support rod (5), and a positioning ring (702) is fixed at the end of the adjustment rod (701), a positioning groove (703) with openings on both sides is provided on the vertical rod (2), and a plurality of positioning holes (704) distributed at equal intervals are provided on the vertical rod (2), two positioning rings (702) are aligned with one of the positioning holes (704), and a positioning pin (705) is inserted into the positioning hole (704).

3. A sleeve inner roundness detection device according to claim 1 or 2, characterized in that: The rotating mechanism (8) comprises a lifting slider (802), a vertical groove (801) is provided on the mounting plate (3), the lifting slider (802) is slidably arranged in the vertical groove (801), a rotating rod (803) is rotatably arranged in the middle of the lifting slider (802), a rotating wheel (805) and a rotating sleeve (804) are respectively fixed at both ends of the rotating rod (803), and the rotating sleeve (804) is located directly above the two supporting rods (5), and a pressure spring (806) is fixed to the lifting slider (802), and the upper end of the pressure spring (806) is against the inner wall of the vertical groove (801).

4. A sleeve inner roundness detection device according to claim 3, characterized in that: The length of the rotating sleeve (804) is greater than the length of the supporting rod (5), and an embedding groove is provided on the outer side of the rotating sleeve (804), and an anti-slip ring (807) is fixed in the embedding groove.

5. The device for detecting the inner roundness of a sleeve according to claim 1, characterized in that: The ejector pin (12) is provided with a thread groove, and a fixing ring is provided at one end of the cross bar (11) away from the measuring head of the micrometer (10), and the ejector pin (12) passes through the fixing ring. Two fixing nuts (14) are threadedly connected to the ejector pin (12), and the two fixing nuts (14) are respectively pressed against two sides of the fixing ring.

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