CN222086901U - Cam symmetry detects frock - Google Patents
Cam symmetry detects frock Download PDFInfo
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- CN222086901U CN222086901U CN202420855303.0U CN202420855303U CN222086901U CN 222086901 U CN222086901 U CN 222086901U CN 202420855303 U CN202420855303 U CN 202420855303U CN 222086901 U CN222086901 U CN 222086901U
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Abstract
提供一种凸轮对称度检测工装，具有条状板体；条状板体制有滑块固定滑槽；中心通转动支承安装锥度芯轴；锥度芯轴圆锥体段同轴套装凸轮；条状板体上、下两侧分别对称安装千分表；千分表垂直夹紧固定安装在夹紧杆端部；用螺母和垫片锁定夹紧杆相对条状板体的夹紧位置；夹紧杆杆体端部制有的外螺纹旋合适配连接滑块；滑块纳入滑块固定滑槽制有的滑块槽内，且滑块与滑块槽滑动适配。本实用新型解决凸轮廓线加工精度的快速准确检测技术问题；能快速准确地检测凸轮每个位置的对称度，检测快速、精准、高效，保证加工精度的一致性。
Provided is a cam symmetry detection tool, which has a strip plate body; the strip plate body is provided with a slider fixing slot; the center is through the rotating support to install the tapered mandrel; the tapered mandrel cone section is coaxially mounted on the cam; the micrometer is symmetrically installed on the upper and lower sides of the strip plate body; the micrometer is vertically clamped and fixedly installed at the end of the clamping rod; the clamping position of the clamping rod relative to the strip plate body is locked with a nut and a gasket; the external thread formed on the end of the clamping rod body is screwed to fit and connect the slider; the slider is inserted into the slider groove formed in the slider fixing slot, and the slider is slidably adapted to the slider groove. The utility model solves the technical problem of rapid and accurate detection of cam contour processing accuracy; it can quickly and accurately detect the symmetry of each position of the cam, and the detection is fast, accurate and efficient, ensuring the consistency of processing accuracy.
Description
Technical Field
The utility model belongs to the technical field of physical measurement and test, and particularly relates to a cam symmetry detection tool.
Background
The cam is a very important part in a harmonic speed reducer mechanism, the form and the machining precision of a profile of the cam directly influence an original curve in the operation principle of the harmonic speed reducer, in the use process, the control mode of the cam precision generally only controls the symmetry degree of the cam long and short axes and the sizes of the highest point and the lowest point due to the limitation of a detection means, as shown in a figure 1, when the cam is measured by using a simple measuring tool in the early stage, the symmetry degree is measured by directly finding the difference of the amplitudes of the two highest points or the two lowest points of the cam profile, and the fact that the connecting line of the two highest points or the two lowest points passes through the center is not necessarily ensured due to the deviation of the machining precision, and the fact that the symmetry degree has a theoretical difference is required in the actual use state, and the deviation of the amplitude value in any angle cannot be detected, namely, the symmetry degree of the cam profile in pi angle causes the incomplete factor for measuring the machining precision of the cam profile, and directly influences the performance of the harmonic speed reducer.
Disclosure of utility model
The utility model solves the technical problem of providing a cam symmetry detection tool and a use method thereof, and solving the technical problem of rapid and accurate detection of cam profile machining precision.
The technical scheme includes that the cam symmetry detection tool comprises a vertically arranged strip-shaped plate body, the strip-shaped plate body is provided with vertically arranged slide block fixing sliding grooves which are symmetrical up and down, a taper mandrel is rotatably supported and installed at the center of the strip-shaped plate body through a bearing, one section of the taper mandrel is a cylinder, the other section of the taper mandrel is a cone, the center line of the taper mandrel is horizontally arranged, the center line of the taper mandrel is perpendicular to the vertically arranged strip-shaped plate body, cams to be detected are coaxially sleeved on the taper mandrel cone section, the strip-shaped plate body takes the center line of the taper mandrel as a symmetrical axis, dial gauges are symmetrically installed on the upper side and the lower side of the strip-shaped plate body respectively, the dial gauges are vertically clamped and fixedly installed at the end parts of a clamping rod, the dial gauges are perpendicular to the center line of the taper mandrel, the clamping rod vertically penetrates through bean-shaped through holes of the sliding groove, the clamping rod is locked at the clamping position of the clamping rod relative to the strip-shaped plate body through nuts and gaskets, the end parts of the clamping rod body are provided with external threads, the external threads are rotatably and suitably connected with the sliding blocks, the sliding blocks are contained in the sliding block grooves formed in the sliding block fixing sliding grooves, and the sliding blocks are in the sliding grooves and are in sliding fit.
In the technical scheme, as the preferable scheme of the utility model, the taper delta angle of the taper mandrel is 0.02-0.05 degrees and is used for matching the inner hole tolerance of the cams, so that the cams with the same inner hole size can be detected by using one taper mandrel, and the mounted cams are limited to slip on the taper mandrel.
In the technical scheme, the diameter of the cylindrical section of the taper mandrel is phid, the length of the cylindrical section of the taper mandrel is L21, the diameter of the small end of the conical section of the taper mandrel is phid, the diameter of the large end of the conical section of the taper mandrel is phid, the length of the conical section of the taper mandrel is L22, and the diameter of the conical section of the taper mandrel is 0.03-0.1 mm.
According to the technical scheme, the dial indicator is further improved in that the external thread formed at one end of the rod body of the clamping rod is screwed into the threaded hole of the slide block, the slide block is connected with the slide block in a proper fit mode, and the vertical distance L42 between the dial indicator measuring head and the axis of the taper mandrel is adjusted by adjusting the height of the slide block in the slide block fixing chute.
According to the technical scheme, as a further improvement, a baffle is arranged in the middle of the clamping rod body, and the axial distance L41 between the baffle and the contact surface of the sliding block fixing chute along the axis of the taper mandrel of the dial gauge measuring head is adjusted by increasing or decreasing the gasket.
According to the technical scheme, as a further improvement, the clamping hole and the open slot are formed in the other end of the clamping rod body, the open slot divides the tail of the clamping rod into two parts, one part of the open slot is provided with a clamping through hole, the other part of the open slot is provided with a clamping threaded hole in a concentric manner with the clamping through hole, the clamping hole clamps the dial indicator rod body, a screw penetrates through the clamping through hole and then is screwed into the clamping threaded hole so as to vertically clamp and fix the dial indicator at the end of the clamping rod, and a clamping gap is reserved in the middle of the open slot after the screw is screwed and clamps the dial indicator, so that the clamping force is ensured.
Compared with the prior art, the utility model has the advantages that:
1. the cam profile detection device is used for detecting the machining precision of the cam profile, can rapidly and accurately detect the symmetry degree of each position of the cam, and ensures the consistency of the machining precision.
2. The clamping and fixing and position adjusting operation of the dial indicator are simple and convenient, the axial position of the dial indicator measuring head along the taper mandrel and the two-degree-of-freedom adjustment of the height of the dial indicator measuring head from the taper mandrel can be realized, and the cam detection requirement is met.
3. The taper of the taper mandrel is used for matching the tolerance of the inner hole of the cam, so that the cams with the same inner hole size can be detected by using one taper mandrel, and the cams cannot slip on the taper mandrel after being installed.
4. The two ends of the taper mandrel are provided with the center holes, so that the axis of the taper mandrel is vertical to the sliding block fixing sliding groove after the taper mandrel is installed, namely, the sliding block fixing sliding groove is vertical to the center of the cam, the connecting line of the measuring heads of the two dial indicators is vertical to the center of the cam during detection, and the amplitude values of two points of the connecting line passing through the center of the cam in the cam profile are detected simultaneously, so that the symmetry degree of the cam with any pi angle can be detected, and the detection is more accurate.
Drawings
FIG. 1 is a schematic illustration of a cam profile detection project analysis;
FIG. 2 is a perspective view of the inspection tool of the present utility model;
FIG. 3 is a top view of the inspection tool of the present utility model;
FIG. 4 is a B-B cross-sectional view of the inspection tool of FIG. 3 in accordance with the present utility model;
FIG. 5 is a front view of the inspection tool of FIG. 4 in the direction A in accordance with the present utility model;
FIG. 6 is a perspective view of a strip-shaped plate in the inspection tool of the present utility model;
FIG. 7 is a front view of the strip plate of FIG. 6;
FIG. 8 is a C-C cross-sectional view of the strip plate of FIG. 7;
FIG. 9 is a D-D cross-sectional view of the strip plate of FIG. 7;
FIG. 10 is a front view of a slider in the inspection tool of the present utility model;
FIG. 11 is a cross-sectional view of the slider of FIG. 10;
FIG. 12 is a perspective view of a clamping lever in the inspection tool of the present utility model
FIG. 13 is a front view of a clamping lever in the inspection tool of the present utility model;
FIG. 14 is a cross-sectional view A-A of the clamping bar of FIG. 13;
FIG. 15 is a B-B cross-sectional view of the clamping bar of FIG. 13;
In the figure, a cam, a 2-taper mandrel, a 2 a-center hole, a 3-dial gauge, a 3 a-measuring head, a 4-clamping rod, a 401-baffle, a 46-contact surface, a 4 a-clamping hole, a 4 b-clamping through hole, a 4 c-clamping threaded hole, a 4 d-opening groove, a 4 f-external thread, a 5-screw, a 5a clamping gap, a 6-slide fixing chute, a 6 a-slide groove, a 6 b-bean-shaped through hole, a 6 c-bearing mounting hole, a 7-slide, a 7 a-slide threaded hole, an 8-nut, a 9-bearing and a 10-strip-shaped plate body are shown.
Detailed Description
The technical solutions according to the embodiments of the present utility model will be clearly and completely described below with reference to fig. 2 to 15 in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The cam symmetry degree detection tool (shown in fig. 4) is provided with a vertically arranged strip-shaped plate body 10, the strip-shaped plate body 10 is small in structure, the whole weight of the detection tool is reduced, and the detection tool is convenient to hold.
The strip-shaped plate body 10 (shown in connection with fig. 6 to 9) is provided with slide fixing sliding grooves 6 which are vertically arranged and are symmetrical up and down. The slide block fixing chute 6 is used for adjusting the upper and lower positions and the left and right positions of the dial indicator 3.
The center of the strip-shaped plate body 10 rotatably supports and installs the taper mandrel 2 through a bearing 9. The assembly process of the taper mandrel 2 has been described in the previous steps of the use method, so that the taper mandrel 2 drives the cam 1 to rotate flexibly without abrasion.
(In connection with fig. 4) the tapered mandrel 2 is cylindrical in one section and conical in the other section.
In the embodiment, as the preferable scheme of the utility model, the taper delta angle of the taper mandrel 2 is 0.02-0.05 degrees, and the taper delta angle is used for matching the inner hole tolerance of the cams 1, so that the cams 1 with the same inner hole size can be detected by using one taper mandrel 2, the universality is improved, and the installed cams 1 are limited to slip on the taper mandrel 2 through a taper section, so that the detection precision is ensured.
In the above embodiment (as shown in fig. 4), as a preferred scheme of the present utility model, the cylindrical section of the tapered mandrel 2 has a diameter phid and a length L21, and the cylindrical section is used for realizing the rotational installation of the tapered mandrel 2 in the bearing 9. The diameter of the small end of the conical section of the conical mandrel 2 is phid, the diameter of the large end of the conical section is phid, the length of the conical section is L22, and phid-phid is 0.03 mm-0.1 mm. Cams 1 realizing the same bore size can be detected by a taper mandrel 2.
The center line of the taper mandrel 2 is horizontally arranged, and the center line of the taper mandrel 2 is perpendicular to the vertically arranged strip-shaped plate body 10, so that a foundation is laid for vertical detection and installation of the dial indicator 3.
The taper mandrel 2 is coaxially sleeved with the cam 1 to be detected.
(As shown in fig. 2 and 4), the strip-shaped plate body 10 takes the central line of the taper mandrel 2 as a symmetrical axis, and dial indicators 3 are symmetrically arranged on the upper side and the lower side of the strip-shaped plate body 10 respectively.
When the dial indicator 3 is installed on the clamping rod 4, the dial indicator 3 is vertically clamped and fixedly installed at the end part of the clamping rod 4, and the dial indicator 3 is vertical to the central line of the taper mandrel 2.
In order to realize the adjustment of the position of the dial indicator 3, the clamping rod 4 vertically penetrates through the bean-shaped through hole 6b of the sliding block fixing sliding groove 6, and the length of the end part of the clamping rod 4 extending out of the bean-shaped through hole 6b is adjusted to be used for adjusting the horizontal position of the dial indicator 3. The end part of the rod body of the clamping rod 4 is provided with an external thread 4f, the external thread 4f is screwed and connected with a slide block 7 in a proper fit, the slide block 7 is accommodated in a slide block groove 6a formed in a slide block fixing chute 6, and the slide block 7 is in sliding fit with the slide block groove 6a and is used for adjusting the upper and lower heights of the dial indicator 3.
In order to lock the position of the dial indicator 3, the clamping rod 4 is locked at the clamping position of the clamping rod 4 relative to the strip-shaped plate body 10 by using the nuts 8 and the gaskets.
In the above embodiment (as shown in fig. 4), as a further improvement of the present utility model, an external thread 4f formed at one end of the rod body of the clamping rod 4 is screwed into a threaded slider hole 7a of the slider 7. The position of the dial indicator 3 on the clamping rod 4 is locked by screwing a proper mounting nut 8 through an external thread 4 f.
Specifically, in order to realize the adjustment of the upper and lower heights and the left and right positions of the dial indicator 3, the vertical distance L42 between the measuring head 3a of the dial indicator 3 and the axis of the taper mandrel 2 is adjusted by adjusting the height of the sliding block 7 in the sliding block fixing chute 6 (as shown in fig. 4). A baffle 401 is arranged in the middle of the rod body of the clamping rod 4, and the axial distance L41 of the measuring head 3a of the dial indicator 3 along the axis of the taper mandrel 2 is adjusted by increasing or decreasing the gasket between the baffle 401 and the contact surface 46 of the sliding block fixing chute 6.
In the above embodiment (as shown in fig. 12 to 15), as a further improvement of the present utility model, a clamping hole 4a and an open slot 4d are formed at the other end of the rod body of the clamping rod 4, the clamping hole 4a is used for restraining and fixing the dial indicator 3 rod, and the open slot 4d is used for locking the dial indicator 3.
The tail of the clamping rod 4 is divided into two parts by the open groove 4d, one part of the open groove 4d is provided with a clamping through hole 4b, and the other part of the open groove 4d is provided with a clamping threaded hole 4c which is concentric with the clamping through hole 4 b. When in fastening, only one screw 5 is needed, and the locking can be realized without using a nut. The clamping hole 4a clamps the rod body of the dial indicator 3, and the screw 5 passes through the clamping through hole 4b and then screwed into the clamping threaded hole 4c so as to vertically clamp and fix the dial indicator 3 at the end part of the clamping rod 4.
In order to ensure the clamping force, after the screw 5 is screwed down and clamps the dial indicator 3, a clamping gap 5a is reserved between the opening grooves 4d and is used for ensuring the clamping force.
The cam symmetry detection using method (shown in combination with fig. 2 and 4) related to the utility model, namely the working principle, comprises the following steps:
Step 1, the bearing 9 is installed in a bearing installation hole 6c (shown in fig. 4 and 8) formed in the center of the strip-shaped plate body 10, and the sliding block 7 is installed in a sliding block groove 6a (shown in fig. 4 and 9) of a sliding block fixing sliding groove 6 formed in the strip-shaped plate body 10, so that assembly preparation is made.
And 2, coaxially and fixedly sleeving the cam 1 to be detected on the taper mandrel 2, and preparing for assembling the cam 1 on a detection tool for detecting the cam 1.
Step 3, sleeving the taper mandrel 2 into the bearing 9, horizontally arranging the central lines of the central holes 2a at the two ends of the taper mandrel 2, and ensuring the detection precision.
And 4, inserting the dial indicator 3 into the clamping hole 4a of the clamping rod 4, and screwing the dial indicator 3 by using the screw 5 to vertically and fixedly mount the dial indicator 3 at the end part of the clamping rod 4, thereby ensuring the vertical mounting of the dial indicator 3.
The step 5 is to screw the clamping rod 4 into the sliding block 7 to realize pre-installation of the clamping rod 4, and then adjust the position of the measuring head 3a of the dial indicator 3 according to the position of the cam 1, wherein the step 4 is to adjust the axial distance L41 of the measuring head 3a of the dial indicator 3 along the axis of the taper mandrel 2 and the vertical distance L42 of the measuring head 3a of the dial indicator 3 from the axis of the taper mandrel 2, and the distances L41 of the upper dial indicator 3 and the lower dial indicator 3 are the same, the distances L42 of the upper dial indicator 3 and the lower dial indicator 3 are the same, and the symmetrical position of the double dial indicators 3 relative to the cam 1 is adjusted, so that the detection precision of the profile of the follow-up cam 1 is ensured.
And 6, vertically fixing the clamping rod 4 with the adjusted position on a sliding block fixing chute 6 formed by the strip-shaped plate body 10 by using a nut 8 and a gasket. I.e. the position of the dial indicator 3 on the clamping lever 4 locked in the adjusted position.
And 7, starting detection. And the taper mandrel 2 is rotated, the upper dial indicator 3 and the lower dial indicator 3 are utilized to simultaneously detect the amplitude value of the corresponding position of the cam 1, and the upper amplitude value deviation and the lower amplitude value deviation are the symmetry degree detection result of the profile of the cam 1 at the position.
It should be noted (as shown in fig. 4) that the positions of the upper and lower dial indicators 3 should be adjusted in advance adaptively when detecting the change of the profile position of the cam 1. During adjustment, the L41 distances of the upper dial indicator 3 and the lower dial indicator 3 are always ensured to be the same, and the L42 distances of the upper dial indicator 3 and the lower dial indicator 3 are the same.
Through the description, the utility model is used for detecting the machining precision of the profile of the cam 1, can rapidly and accurately detect the symmetry degree of each position of the cam 1, and ensures the consistency of the machining precision.
The clamping and fixing and position adjusting operation of the dial indicator 3 are simple and convenient, the two-degree-of-freedom adjustment of the axial position of the measuring head 3a of the dial indicator 3 along the taper mandrel 2 and the height of the measuring head 3a of the dial indicator 3 from the taper mandrel 2 can be realized, and the detection requirement of the cam 1 is met.
The taper of the taper mandrel 2 is used for matching the tolerance of the inner hole of the cam 1, so that the cams with the same inner hole size can be detected by using one taper mandrel, and the cams cannot slip on the taper mandrel 2 after the cams are installed.
The two ends of the taper mandrel 2 are provided with the central holes 2a, so that the axis of the taper mandrel 2 is vertical to the sliding block fixing sliding groove 6 after being installed, namely the sliding block fixing sliding groove 6 is vertical to the center of the cam 1, the connecting line of the measuring heads 3a of the two dial indicators 3 is vertical to the center of the cam 1 during detection, and the amplitude values of two points of the profile of the cam 1, which pass through the connecting line of the cam center, are detected simultaneously, so that the symmetry degree of the cam 1 with any pi angle can be detected, and the detection is more accurate.
In summary, the utility model solves the technical problem of rapid and accurate detection of cam profile machining precision. Simple structure adjusts convenient operation, satisfies that cam 1 of same kind hole size all can detect with a tapering dabber 2, detects accurate high efficiency, is fit for promoting.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (6)
1. A cam symmetry detection tool is characterized by comprising a vertically arranged strip-shaped plate body (10), wherein a slide block fixing chute (6) which is vertically arranged and is vertically symmetrical is formed in the strip-shaped plate body (10), a taper mandrel (2) is rotatably supported and installed at the center of the strip-shaped plate body (10) through a bearing (9), one section of the taper mandrel (2) is a cylinder, the other section of the taper mandrel is a cone, the center line of the taper mandrel (2) is horizontally arranged, the center line of the taper mandrel (2) is perpendicular to the vertically arranged strip-shaped plate body (10), a cam (1) to be detected is coaxially sleeved on the cone section of the taper mandrel (2), a dial indicator (3) is symmetrically installed at the upper side and the lower side of the strip-shaped plate body (10) respectively, the dial indicator (3) is vertically clamped and fixedly installed at the end part of a clamping rod (4), the dial indicator (3) is perpendicular to the center line of the taper mandrel (2), the clamping rod (4) vertically penetrates through a bean-shaped through hole (6 b) of the sliding block fixing sliding groove (6), the clamping position of the clamping rod (4) relative to the strip-shaped plate body (10) is locked by a nut (8) and a gasket, an external thread (4 f) is formed at the end of the rod body of the clamping rod (4), the external thread (4 f) is in rotary fit with a connecting sliding block (7), the sliding block (7) is accommodated in a sliding block groove (6 a) formed in the sliding block fixing sliding groove (6), and the sliding block (7) is in sliding fit with the sliding block groove (6 a).
2. The tool as set forth in claim 1, wherein the taper delta angle of the taper mandrel (2) is 0.02-0.05 degrees, and the taper delta angle is used for matching the inner hole tolerance of the cams (1), so that the cams (1) with the same inner hole size can be detected by one taper mandrel (2), and the installed cams (1) are limited to slip on the taper mandrel (2).
3. The tool of claim 2, wherein the diameter of the cylindrical section of the taper mandrel (2) is phid, the length of the cylindrical section is L21, the diameter of the small end of the conical section of the taper mandrel (2) is phid, the diameter of the large end of the conical section is phid, the length of the conical section is L22, and phid-phid is 0.03 mm-0.1 mm.
4. The tool set forth in claim 1, wherein an external thread (4 f) formed at one end of the rod body of the clamping rod (4) is screwed into a slide block threaded hole (7 a) which is connected with the slide block (7) in a matching manner, and the vertical distance L42 between the measuring head (3 a) of the dial indicator (3) and the axis of the taper mandrel (2) is adjusted by adjusting the height of the slide block (7) in the slide block fixing chute (6).
5. The tool set forth in claim 1, wherein a baffle plate (401) is arranged in the middle of the rod body of the clamping rod (4), and the axial distance L41 between the baffle plate (401) and the contact surface (46) of the sliding block fixing chute (6) along the axis of the taper mandrel (2) of the measuring head (3 a) of the dial indicator (3) is adjusted by increasing and decreasing gaskets.
6. The tool according to claim 1, 4 or 5, wherein the other end of the rod body of the clamping rod (4) is provided with a clamping hole (4 a) and an opening groove (4 d), the opening groove (4 d) divides the tail of the clamping rod (4) into two parts, one part of the opening groove (4 d) is provided with a clamping through hole (4 b), the other part of the opening groove (4 d) is provided with a clamping threaded hole (4 c) in a concentric manner with the clamping through hole (4 b), the clamping hole (4 a) is used for clamping the rod body of the dial indicator (3), a screw (5) penetrates through the clamping through hole (4 b) and then is screwed into the clamping threaded hole (4 c) so as to vertically clamp and fix the dial indicator (3) at the end of the clamping rod (4), and after the screw (5) is screwed and the dial indicator (3) is clamped, a clamping gap (5 a) is reserved between the opening groove (4 d) for ensuring the clamping force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420855303.0U CN222086901U (en) | 2024-04-23 | 2024-04-23 | Cam symmetry detects frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420855303.0U CN222086901U (en) | 2024-04-23 | 2024-04-23 | Cam symmetry detects frock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222086901U true CN222086901U (en) | 2024-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420855303.0U Active CN222086901U (en) | 2024-04-23 | 2024-04-23 | Cam symmetry detects frock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222086901U (en) |
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2024
- 2024-04-23 CN CN202420855303.0U patent/CN222086901U/en active Active
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