Disengagement positioning detection device of rotary table indexing mechanism

Abstract

The utility model discloses a disengagement positioning detection device of a rotary table indexing mechanism, which comprises a working table, a transmission assembly and a fluted disc disengagement detection assembly, the transmission assembly is arranged on the working table and comprises a motor, a speed reducer, a bevel gear shaft and a bevel gear, the fluted disc disengagement detection assembly is arranged on the portion, on one side of the transmission assembly, of the workbench sliding base and comprises a detection support, a detection switch, a spring base, a connecting rod and a collision block. Transmission parts are simple in structure, small in number, high in positioning rigidity, high in repeated positioning precision and high in indexing precision, the indexing workbench is low in overall manufacturing cost, batch production can be achieved, the overall cost performance of a machine tool is improved, a deep groove ball bearing is additionally arranged on a connecting rod of the fluted disc disengagement detection assembly, the deep groove ball bearing makes contact with the end face of a gear ring, and the detection precision is improved. Therefore, the friction degree between the gear ring and the gear ring is reduced, the loss is reduced, and the service life is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control rotary tables, and particularly relates to a disengaging and positioning detection device for a indexing mechanism of a rotary worktable. Background Art

[0002] With the development of China's machinery industry, the market has an increasing demand for high-precision machining and composite machining of workpieces. The indexing worktable is the most critical functional component in machining centers, especially horizontal machining centers. The indexing worktable refers to a machine tool accessory with a movable tabletop for clamping workpieces and achieving indexing and positioning. According to the instructions of the numerical control system, when indexing work is required, the worktable rotates a specified angle together with the workpiece to change the position of the workpiece relative to the spindle, so that multiple surfaces of the workpiece can be machined in one installation.

[0003] Currently, the indexing worktables generally in use usually adopt a belt drive method to achieve the indexing operation of the worktable. Since the load that the belt can bear is small, it is not suitable for the machining of large parts. Moreover, the component for detecting the disengagement of the detection gear disk is in direct contact with the end face of the gear ring, with a high degree of friction and large loss, resulting in a short service life of the detection device. Summary of the Invention

[0004] To solve the above problems, the utility model provides a disengaging and positioning detection device for a indexing mechanism of a rotary worktable, which has a simple structure and a small number of transmission parts, high positioning stiffness and high indexing accuracy.

[0005] To achieve the above object, the utility model adopts the following technical scheme: A disengaging and positioning detection device for a indexing mechanism of a rotary worktable, comprising a worktable, a transmission assembly and a gear disk disengagement detection assembly. The transmission assembly is arranged on the worktable. The transmission assembly includes a motor, a speed reducer, a bevel gear shaft and bevel gears. The motor is arranged on the tabletop of the worktable, and the output shaft of the motor is directly connected to the input shaft of the speed reducer. A bevel gear shaft is sleeved and connected to the output shaft of the speed reducer. The bevel gear is arranged below the side of the lower gear disk gear ring of the worktable, and its tooth surface meshes with the bevel teeth of the bevel gear shaft. The gear shaft of the bevel gear is arranged upward, and its tooth surface meshes with the gear ring of the lower gear disk of the worktable.

[0006] The tooth disc disengagement detection component is arranged on the workbench slide on one side of the transmission component. The tooth disc disengagement detection component includes a detection bracket, a detection switch, a spring seat, a connecting rod and a collision block. The detection bracket is an inverted "L" - shaped frame. There is an installation strip groove in the middle of the end face of its vertical end. There are threaded holes on the horizontal end face of the detection bracket, and it is connected to the workbench surface below the tooth disc on the workbench through bolts. The number of the detection switches is two. One is above and the other is below. They are installed in the installation strip groove of the detection bracket through a return spring, and the part passing through the installation strip groove is an arc structure. Among them, the one located below is the first switch for detecting meshing, and the one located above is the second switch for detecting disengagement.

[0007] The spring seat is arranged on one side of the detection bracket and is located below the disc surface of the upper tooth disc on the workbench. The spring seat is connected to the workbench. There is a spring in the spring seat. The connecting rod is located in the spring seat. The middle - upper part of the connecting rod is the contact end, and the remaining part is the connecting end. The diameter of the contact end is larger than that of the connecting end. There is an installation hole groove on the top surface of the contact end. A support shaft is installed in the installation hole groove, and a deep - groove ball bearing is installed on the support shaft. The connecting end of the connecting rod is snap - connected with the spring in the spring seat, and the bottom of the connecting end passes through the outside of the spring seat. Under the elastic force of the spring, the contact end of the connecting rod makes the deep - groove ball bearing on its top surface roll - contact with the bottom of the disc surface of the upper tooth disc on the workbench whether in the meshing or disengagement state. The collision block is installed on the bottom of the connecting rod, and its peripheral surface faces the detection switch.

[0008] Preferably, for the convenience of replacement and maintenance, the spring seat is connected to the workbench through a bolt structure.

[0009] Beneficial effects: ①. The transmission parts of the present utility model have a simple structure, a small number, high positioning stiffness, high repeat positioning accuracy, high indexing accuracy, and low overall manufacturing cost of the indexing workbench. It can achieve mass production and improve the overall cost - performance of the machine tool.

[0010] ②. In the tooth disc disengagement detection component of the present utility model, a deep - groove ball bearing is added to the connecting rod. The deep - groove ball bearing contacts the end face of the tooth ring and rotates with the rotation of the tooth ring, reducing the friction degree and wear between the two, and effectively extending the service life. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the present utility model.

[0012] Figure 2 It is Figure 1 The cross - sectional view taken along A - A in

[0013] Figure 3 It is Figure 1 The cross - sectional view taken along B - B in

[0014] Figure 4This is a schematic structural view of the connecting rod in the present utility model.

[0015] In the figure: 1, workbench; 2, motor; 3, speed reducer; 4, bevel gear shaft; 5, bevel gear; 6, detection bracket; 7, detection switch; 8, spring seat; 9, connecting rod; 10, collision block; 11, support shaft; 12, deep groove ball bearing; 13, lower tooth disc; 14, upper tooth disc. Specific embodiments

[0016] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Among them, the same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. Moreover, the accompanying drawings are all in a very simplified form and use non-precise ratios, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0018] As Figures 1-4 shown, this embodiment discloses a disengagement positioning detection device for a rotary worktable indexing mechanism, which is used for detecting the disengagement of the indexing drive of the rotary worktable for a numerical control machine tool and the upper and lower tooth discs 14 and 13 of the workbench 1. Specifically, it includes a workbench 1, a transmission assembly and a tooth disc disengagement detection assembly. Refer to Figure 1 , the transmission assembly is arranged on the workbench 1. The transmission assembly includes a motor 2, a speed reducer 3, a bevel gear shaft 4 and a bevel gear 5. It can be seen from Figure 1 that the motor 2 is arranged on the tabletop of the workbench 1, and the output shaft of the motor 2 is directly connected to the input shaft of the speed reducer 3. Refer to Figure 2 , a bevel gear shaft 4 is sleeved and connected to the output shaft of the speed reducer 3. The bevel gear 5 is arranged on the lower side of the tooth ring of the lower tooth disc 13 of the workbench 1, and its tooth surface meshes with the conical teeth of the bevel gear shaft 4. The gear shaft of the bevel gear 5 is arranged upwards, and its tooth surface meshes with the tooth ring of the lower tooth disc 13 of the workbench 1.

[0019] Refer to Figure 1 , the tooth disc disengagement detection assembly is arranged on the slide seat of the workbench 1 on one side of the transmission assembly. It can be seen from Figure 3 that the tooth disc disengagement detection assembly includes a detection bracket 6, a detection switch 7, a spring seat 8, a connecting rod 9 and a collision block 10. Refer to Figure 3, the detection bracket 6 is an inverted "L" - shaped bracket. A mounting strip groove is provided in the middle of the end face of its vertical end. A threaded hole is provided on the horizontal end face of the detection bracket 6, and it is connected to the surface of the workbench 1 below the side of the tooth disc 14 on the workbench 1 through a bolt. The number of the detection switches 7 is two. They are installed in the mounting strip groove of the detection bracket 6 from top to bottom through a return spring, and the part extending out of the mounting strip groove is an arc structure. Among them, the one located below is the first switch for detecting meshing, and the one located above is the second switch for detecting disengagement.

[0020] See Figure 3 , the spring seat 8 is arranged on one side of the detection bracket 6 and is located below the disc surface of the upper tooth disc 14 of the workbench 1. The spring seat 8 is connected to the workbench 1 through a bolt structure. A spring is provided inside the spring seat 8. The connecting rod 9 is located inside the spring seat 8. For the specific structure, see Figure 4 , the middle - upper part of the connecting rod 9 is the contact end, and the remaining part is the connecting end. The diameter of the contact end is larger than that of the connecting end. A mounting hole groove is provided on the top surface of the contact end. A support shaft 11 is installed in the mounting hole groove, and a deep - groove ball bearing 12 is installed on the support shaft 11. The connecting end of the connecting rod 9 is snap - fitted with the spring inside the spring seat 8, and the bottom of the connecting end extends out of the spring seat 8. See Figure 3 , under the elastic force of the spring, the contact end of the connecting rod 9 enables the deep - groove ball bearing 12 on its top surface to roll - contact with the bottom surface of the upper tooth disc 14 of the workbench 1 whether in the meshing or disengagement state. The collision block 10 is installed at the bottom of the connecting rod 9, and its peripheral surface faces the detection switch 7.

[0021] During use, the transmission component uses a reducer 3 directly connected to a bevel - gear shaft. The bevel gear on the bevel - gear shaft meshes with the bevel gear on the gear shaft, and then the gear on the gear shaft meshes with the lower tooth disc 13 fixed on the workbench 1 to transmit power to realize the operation of the workbench 1. For the tooth - disc disengagement detection component, a deep - groove ball bearing 12 is added to the connecting rod 9. The deep - groove ball bearing 12 contacts the end face of the tooth ring and rotates following the rotation of the tooth ring. The connecting rod 9 is equipped with a spring, which can ensure that the bearing can contact the upper tooth disc 14 of the workbench 1 whether the tooth discs are in the meshing or disengagement state. When the upper and lower tooth discs are meshed, the upper tooth disc 14 presses down, driving the connecting rod 9 and the collision block 10 at its bottom to sink. At this time, the horizontal position of the collision block 10 is at the same horizontal position as the first switch, and the first switch is pushed out, making its length outside greater than that of the second switch. When the upper and lower tooth discs are disengaged, the upper tooth disc 14 rises, and the connecting rod 9 rises under the elastic force of the spring in the spring seat 8 and always contacts the bottom surface of the upper tooth disc 14. At this time, the collision block 10 rises and is at the same horizontal position as the second switch, and the second switch is pushed out, making its length outside greater than that of the first switch. By observing the extended lengths of the two switches, it can be determined whether the upper and lower tooth discs are in the meshing or disengagement state.

[0022] The above embodiments are only illustrative of the principles and effects of the present utility model and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A disengagement positioning detection device for a rotary table indexing mechanism, comprising a table (1), a transmission assembly and a toothed disc disengagement detection assembly, wherein the transmission assembly is arranged on the table (1), and is characterized in that: The transmission assembly comprises a motor (2), a reducer (3), a bevel gear shaft (4) and a bevel gear (5), wherein the motor (2) is arranged on the table surface of a workbench (1), the output shaft of the motor (2) is directly connected to the input shaft of the reducer (3), the output shaft of the reducer (3) is provided with a bevel gear shaft (4) connected thereto, the bevel gear (5) is arranged below the side of the gear ring of a lower gear disk (13) of the workbench (1), the tooth surface of the bevel gear (5) meshes with the bevel teeth of the bevel gear shaft (4), the gear shaft of the bevel gear (5) is arranged upward, and the tooth surface of the bevel gear (5) meshes with the gear ring of the lower gear disk (13) of the workbench (1); The toothed disc disengagement detection assembly is arranged on a slide seat of a workbench (1) on one side of the transmission assembly. The toothed disc disengagement detection assembly comprises a detection bracket (6), a detection switch (7), a spring seat (8), a connecting rod (9) and a bumper (10). The detection bracket (6) is an inverted "L"-shaped bracket, and a mounting groove is provided in the middle of the end face of the vertical end thereof. A threaded hole is provided on the horizontal end face of the detection bracket (6), and the detection bracket (6) is connected to the workbench (1) surface below the toothed disc (14) on the workbench (1) by bolts. The number of the detection switches (7) is two, one above and one below, which are installed in the mounting groove of the detection bracket (6) by a reset spring, and the part passing through the mounting groove is an arc-shaped structure, wherein the one located below is a No. 1 switch for detecting engagement, and the one located above is a No. 2 switch for detecting disengagement; The spring seat (8) is arranged on one side of the detection bracket (6) and is located below the disk surface of the upper toothed disk (14) of the workbench (1). The spring seat (8) is connected to the workbench (1). A spring is arranged in the spring seat (8). The connecting rod (9) is located in the spring seat (8). The middle and upper part of the connecting rod (9) is a contact end, and the remaining part is a connecting end. The diameter of the contact end is larger than the diameter of the connecting end. A mounting hole groove is opened on the top surface of the contact end. A support shaft (11) is installed in the mounting hole groove. The support shaft (11) 1) is provided with a deep groove ball bearing (12), the connecting end of the connecting rod (9) is engaged with the spring in the spring seat (8), and the bottom of the connecting end passes through the spring seat (8), and the contact end of the connecting rod (9) is subjected to the elastic force of the spring so that the deep groove ball bearing (12) on the top surface and the bottom of the upper toothed disc (14) of the workbench (1) can roll in contact with each other regardless of whether they are in meshing or disengaging. The bump block (10) is installed on the bottom of the connecting rod (9), and its peripheral surface is opposite to the detection switch (7).

2. The disengagement positioning detection device of the rotary table indexing mechanism according to claim 1, characterized in that: The spring seat (8) is connected to the workbench (1) via a bolt structure.

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