Adjustable electric limiting device and rotary table
By using a component consisting of a worm gear, a worm shaft, and a contact switch, the electric limit device can be flexibly adjusted and accurately positioned in the turntable equipment. This solves the problems of difficult layout and poor adjustability of existing electric limit devices, and improves the accuracy and adaptability of the limit.
Patent Information
- Application Number
- CN202520146205.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing electrical limit devices are difficult to place in turntable equipment, have poor adjustability of extreme turning angle range, resulting in low limit accuracy.
An adjustable electric limit device was designed. Through a component consisting of a turbine, a worm gear, and a contact switch, the limit point can be flexibly adjusted and accurately positioned. The turbine meshes with the worm gear to drive the cam to rotate synchronously, and the contact switch triggers the motor to stop. The device can be continuously adjusted within the range of 0° to 360°.
It improves the accuracy and flexibility of limit positioning, meets various harsh working conditions, and does not affect the layout of cables and optical cables, enabling flexible layout of the turntable or the output shaft of the object under test.
Smart Images
Figure CN223677444U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to mechanical drive technical field, especially related to an adjustable electric position limiting device and rotary table. BACKGROUND
[0002] In the rotary table and other mechanical equipment, the commonly used three kinds of limiting methods are software limiting, electric limiting and mechanical limiting. The relationship of the three kinds of limiting is: software limiting realizes the first protection; when the software algorithm appears invalid or abnormal, the electric limiting is triggered; when the sensor of the electric limiting is abnormal or the cable is abnormal, the mechanical limiting is triggered when the equipment continues to rotate. The commonly used electric limiting device has the following shortcomings: most of them are configured in the periphery of the rotary table and other equipment, and the layout is difficult; the limit angle range of the electric limiting is poor in adjustability, resulting in low accuracy of the electric limiting. INVENTION CONTENTS
[0003] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide an adjustable electric position limiting device and a rotary table applying the device.
[0004] The technical scheme adopted by the utility model is:
[0005] An adjustable electric position limiting device, comprising a mounting mechanism, a central shaft rotatably connected to the mounting mechanism, a shaft sleeve fastened to the central shaft, a support fixed to the shaft sleeve, a worm rotatably connected to the support, a cam and a turbine sleeved on the shaft sleeve, the cam being fixed with the turbine, the turbine being engaged with the worm, and a switch assembly further installed on the mounting mechanism, the switch assembly comprising a contact switch, the contact switch being matched with the cam.
[0006] When the central shaft rotates, the central shaft drives the adjusting assembly to rotate, the convex part of the cam on the adjusting assembly contacts the contact switch, and the contact switch is triggered after continuing to rotate, the control system receives the trigger signal and sends an instruction to make the drive motor of the measured shaft stop running, so that the limiting is realized.
[0007] When the measured shaft rotates to a specific angle, the worm is manually rotated to drive the turbine to rotate around the shaft sleeve axis. Since the cam is fixed with the turbine, the turbine drives the cam to rotate synchronously. When the convex block of the cam contacts the contact switch and continues to rotate, the contact switch is stopped when it is completely triggered. This position is the limiting point of the electric position limiting device at the specific angle position of the measured shaft. The utility model can realize the adjustment of the limiting point, and by setting two groups of turbine, worm, cam and contact switch components, the limiting points can be set on both sides of the measured shaft.
[0008] The electric position limiting device can be flexibly arranged according to the circumferential position of the turntable or the output shaft of the measured object, and does not affect the arrangement of the cable and the optical cable in the output shaft. The electric position limiting device can be continuously adjusted within the range of 0° to 360°, and the accuracy of the corner position limiting of the electric position limiting switch can be improved. The electric position limiting device adjusting assembly is self-locking, and can meet various harsh working conditions such as vibration and impact.
[0009] As a preferred scheme of the utility model, the mounting mechanism comprises a mounting seat, a sleeve is fixed on the mounting seat, and the sleeve is rotatable with the central shaft through a bearing.
[0010] As a preferred scheme of the utility model, the two sides of the support are connected with worms, and the two sides are provided with cams and turbines. The switch assembly comprises two contact switches, and the two contact switches and the two cams are matched one by one. The two groups of worms, turbines, cams and contact switches can set the limiting points on the positive and negative sides of the measured shaft.
[0011] As a preferred scheme of the utility model, the end of the central shaft is threadedly connected with a locking nut.
[0012] As a preferred scheme of the utility model, a round gasket is arranged between the cam close to the locking nut and the shaft shoulder of the central shaft, and a square gasket is arranged between the cam away from the locking nut and the shaft shoulder of the central shaft.
[0013] As a preferred scheme of the utility model, the switch assembly comprises a mounting plate, the mounting plate is fixed on the mounting mechanism, the two contact switches are mounted on the mounting plate, and a gusset plate is arranged between the two contact switches.
[0014] An adjustable electric position limiting turntable comprises a support, a mounting mechanism is mounted on the support, a measured shaft is rotatably connected to the support, a large gear is mounted on the measured shaft, an angle measuring pinion is mounted on a central shaft, and the large gear is engaged with the angle measuring pinion.
[0015] As a preferred scheme of the utility model, a radar is mounted on the measured shaft.
[0016] As a preferred scheme of the utility model, an inertial measurement unit is mounted on the end of the measured shaft.
[0017] As a preferred scheme of the utility model, the angle difference between the high points of the two cams in the circumferential direction of the central shaft is 90°.
[0018] In practical application, since the to-be-measured shaft has a rotation range, for example, 0°-90°, therefore, contact switches need to be arranged on both sides of 0° and 90° to limit the electricity. In order to facilitate the description, it is assumed that the lower contact switch limits the to-be-measured shaft from exceeding the 0° range, and the upper contact switch limits the to-be-measured shaft from exceeding the 90° range. When the to-be-measured shaft rotates to 0°, the lower worm is manually rotated to drive the lower turbine to rotate around the shaft sleeve axis. Since the lower cam is fixed with the lower turbine through a screw, the lower turbine drives the lower cam to rotate synchronously. When the cam block of the lower cam contacts the lower contact switch and continues to rotate, the to-be-measured shaft stops when the contact switch is triggered completely. The adjustment method of the limit point of the electric limiting device at the 0° position of the to-be-measured shaft is similar to that at the 90° position.
[0019] The electric limiting device has the following beneficial effects:
[0020] 1. When the to-be-measured shaft rotates to a specific angle, the worm is manually rotated to drive the turbine to rotate around the shaft sleeve axis. Since the cam is fixed with the turbine, the turbine drives the cam to rotate synchronously. When the cam block of the cam contacts the contact switch and continues to rotate, the to-be-measured shaft stops when the contact switch is triggered completely. The adjustment method of the limit point of the electric limiting device at the 0° position of the to-be-measured shaft is similar to that at the 90° position. The electric limiting device can realize the adjustment of the limit point, and through the arrangement of two sets of turbine, worm, cam and contact switch components, the limit points can be arranged on both sides of the to-be-measured shaft.
[0021] 2. The electric limiting device can be flexibly arranged according to the circumferential position of the turntable or the to-be-measured output shaft, and does not affect the arrangement of the cables and optical cables in the output shaft. The electric limiting device can be continuously adjusted within the range of 0° to 360°, and the accuracy of the electric limiting switch can be improved. The electric limiting device adjustment component structure is self-locking, and can meet various harsh working conditions such as vibration and impact. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a structural schematic view of the first direction of the electric limiting device;
[0023] Figure 2 is a structural schematic view of the second direction of the electric limiting device;
[0024] Figure 3 is a front view of the electric limiting device;
[0025] Figure 4 is Figure 3 is a sectional view of A-A in the electric limiting device;
[0026] Figure 5 is Figure 4 is a sectional view of B-B in the electric limiting device;
[0027] Figure 6 is Figure 4A sectional view at C-C;
[0028] Figure 7 A partial structure diagram of the electric limit position device;
[0029] Figure 8 A sectional view of the rotating table;
[0030] Figure 9 A Figure 8 A local enlarged view at D.
[0031] In the figure: 1 - mounting mechanism; 2 - central shaft; 3 - shaft sleeve; 4 - worm; 5 - cam; 6 - turbine; 7 - switch assembly; 8 - support; 9 - to-be-measured shaft; 11 - mounting seat; 12 - sleeve; 21 - locking nut; 22 - round washer; 23 - square washer; 24 - angle measuring pinion; 31 - bracket; 72 - contact switch; 71 - mounting plate; 73 - backing plate; 91 - large gear; 92 - radar; 93 - inertial measurement unit; 4a - upper worm; 6a - upper turbine; 5a - upper cam; 72a - upper contact switch; 4b - lower worm; 6b - lower turbine; 5b - lower cam; 72b - lower contact switch. DETAILED DESCRIPTION
[0032] To make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0034] As Figures 1-8 shown, the adjustable electric limit position device of the present embodiment comprises a mounting mechanism 1, the mounting mechanism 1 is rotationally connected with a central shaft 2, the central shaft 2 is fastened with a shaft sleeve 3, the shaft sleeve 3 is fixed with a bracket 31, the bracket 31 is rotationally connected with a worm 4, the shaft sleeve 3 is sleeved with a cam 5 and a turbine 6, the cam 5 is fixed with the turbine 6, the turbine 6 is engaged with the worm 4, the mounting mechanism 1 is further installed with a switch assembly 7, the switch assembly 7 comprises a contact switch 72, and the contact switch 72 is matched with the cam 5.
[0035] When the center shaft 2 rotates, the center shaft 2 drives the adjusting assembly to rotate, and the convex block of the cam 5 on the adjusting assembly contacts the contact switch 72 and then continues to rotate to trigger the switch.
[0036] When the to-be-measured shaft rotates to a specific angle, the worm 4 is manually rotated to drive the turbine 6 to rotate around the axis of the shaft sleeve 3. Since the cam 5 is fixed with the turbine 6, the turbine 6 drives the cam 5 to rotate synchronously. When the convex block of the cam 5 contacts the contact switch 72 and continues to rotate, the contact switch 72 stops when it is completely triggered. This position is the limiting point of the electric limiting device at the specific angle position of the to-be-measured shaft. The electric limiting device can adjust the limiting point, and two sets of components composed of the turbine 6, the worm 4, the cam 5 and the contact switch 72 are arranged on the positive side and the reverse side of the to-be-measured shaft.
[0037] The electric limiting device can be flexibly arranged according to the rotary table or the circumferential position of the to-be-measured output shaft, and does not affect the arrangement of the cables and optical cables in the output shaft. The electric limiting device can be continuously adjusted within the range of 0° to 360°, and the accuracy of the electric limiting switch can be improved. The adjusting assembly structure of the electric limiting device is self-locking, and can meet various harsh working conditions such as vibration and impact.
[0038] The mounting mechanism 1 comprises a mounting seat 11, and a sleeve 12 is fixed on the mounting seat 11.
[0039] Furthermore, the two sides of the bracket 31 are connected with the worm 4, and the two sides are provided with the cam 5 and the turbine 6. The switch assembly 7 comprises two contact switches 72, and the two contact switches 72 are matched with the two cams 5 one by one. Two sets of components composed of the worm 4, the turbine 6, the cam 5 and the contact switch 72 can be arranged on the positive side and the reverse side of the to-be-measured shaft.
[0040] The end of the center shaft 2 is threadedly connected with a locking nut 21. The cam 5 close to the locking nut 21 is provided with a round gasket 22 between the shaft shoulder of the center shaft 2, and the cam 5 away from the locking nut 21 is provided with a square gasket 23 between the shaft shoulder of the center shaft 2.
[0041] The switch assembly 7 comprises a mounting plate 11, and the mounting plate 11 is fixed on the mounting mechanism 1. The two contact switches 72 are mounted on the mounting plate 11, and a gasket 73 is arranged between the two contact switches 72.
[0042] As Figure 9As shown, an adjustable electric limit position rotary table comprises a support 8, a mounting mechanism 1 mounted on the support 8, a to-be-measured shaft 9 rotationally connected to the support 8, a large gear 91 mounted on the to-be-measured shaft 9, an angle measuring pinion 24 mounted on the central shaft 2, and the large gear 91 meshes with the angle measuring pinion 24. The to-be-measured shaft 9 is provided with a radar 92. An inertial measurement unit 93 is mounted on the end of the to-be-measured shaft 9.
[0043] It should be noted that the angle difference between the high points of the two cams 5 in the circumferential direction of the central shaft 2 is 90°.
[0044] In actual application, since the to-be-measured shaft has a rotation range, for example, 0°-90°, a contact switch 72 is needed to be arranged on both sides of 0° and 90° to limit the electric position. For the convenience of description, it is assumed that the lower contact switch 72b limits the to-be-measured shaft from exceeding the 0° range, and the upper contact switch 72a limits the to-be-measured shaft from exceeding the 90° range. When the to-be-measured shaft rotates to 0°, the lower worm 4b is manually rotated to drive the lower turbine 6b to rotate around the axis of the shaft sleeve 3. Since the lower cam 5b is fixed with the lower turbine 6b by screws, the lower turbine 6b drives the lower cam 5b to rotate synchronously. When the convex block of the lower cam 5b contacts the lower contact switch 72b and continues to rotate, the to-be-measured shaft stops when the contact switch 72 is completely triggered. This position is the limit point of the electric limit position device at the 0° position of the to-be-measured shaft. The adjustment method of the limit point at 90° is similar to the above.
[0045] The utility model is not limited to the above optional implementation, anyone can draw other various forms of product under the enlightenment of the utility model, but no matter make any change in its shape or structure, all technical schemes falling into the utility model claim definition range, fall in the protection scope of the utility model.
Claims
1. An adjustable electrical limit device, characterized in that: The device includes an installation mechanism (1), on which a central shaft (2) is rotatably connected. A bushing (3) is tightly fitted on the central shaft (2). A bracket (31) is fixed on the bushing (3). A worm gear (4) is rotatably connected on the bracket (31). A cam (5) and a turbine (6) are fitted on the bushing (3). The cam (5) is fixed to the turbine (6). The turbine (6) meshes with the worm gear (4). A switch assembly (7) is also installed on the installation mechanism (1). The switch assembly (7) includes a contact switch (72). The contact switch (72) cooperates with the cam (5).
2. The adjustable electrical limiting device according to claim 1, characterized in that: The mounting mechanism (1) includes a mounting base (11), on which a sleeve (12) is fixed. The sleeve (12) rotates with the central shaft (2) via a bearing.
3. The adjustable electrical limiting device according to claim 1, characterized in that: The bracket (31) is connected to worm gears (4) on both sides, and cams (5) and turbines (6) are provided on both sides between them. The switch assembly (7) includes two contact switches (72), and the two contact switches (72) and the two cams (5) cooperate with each other.
4. The adjustable electrical limit device according to claim 3, characterized in that: The end of the central shaft (2) is threaded with a lock nut (21).
5. An adjustable electrical limiting device according to claim 4, characterized in that: A round washer (22) is provided between the cam (5) on the side closer to the locking nut (21) and the shoulder of the central shaft (2), and a square washer (23) is provided between the cam (5) on the side farther from the locking nut (21) and the shoulder of the central shaft (2).
6. The adjustable electrical limiting device according to claim 3, characterized in that: The switch assembly (7) includes a mounting plate (71) which is fixed on the mounting mechanism (1). Two contact switches (72) are mounted on the mounting plate (71) and a pad (73) is provided between the two contact switches (72).
7. An adjustable electrically limited turntable, comprising the adjustable electrically limited device as described in claim 3, characterized in that: Includes a support (8), an installation mechanism (1) is installed on the support (8), a shaft to be measured (9) is rotatably connected to the support (8), a large gear (91) is installed on the shaft to be measured (9), a small angle measuring gear (24) is installed on the central shaft (2), and the large gear (91) meshes with the small angle measuring gear (24).
8. An adjustable electrically limited turntable according to claim 7, characterized in that: A radar (92) is installed on the axis to be measured (9).
9. An adjustable electrically limited turntable according to claim 7, characterized in that: An inertial measurement unit (93) is installed at the end of the shaft to be measured (9).
10. An adjustable electrically limited turntable according to claim 7, characterized in that: The angle difference between the high points of the two cams (5) on the central axis (2) is 90°.