Auxiliary positioning mechanism

Abstract

The application provides an auxiliary positioning mechanism, and relates to the technical field of mechanical equipment assembly, which comprises a mounting plate and a positioning mechanism; a through hole is arranged on the mounting plate, a rotating shaft is arranged in the through hole, and the rotating shaft is connected with a motor; a rotating plate connected with the rotating shaft is arranged at the upper end of the mounting plate; the positioning mechanism comprises a stop block and a mounting seat; the stop block is fixedly installed on the mounting plate, and the side, away from the rotating shaft, of the stop block is a circular arc surface; a V-shaped first clamping groove is arranged on the circular arc surface. The auxiliary positioning mechanism can accurately assist positioning when the motor stops, can monitor the positioning condition, and has the advantages of simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment assembly, and in particular to an auxiliary positioning mechanism. Background Art

[0002] Turntable rotation mechanisms are commonly used in mechanical equipment assembly. Currently, these mechanisms are often implemented using a swing cylinder with a buffer or a servo motor with a divider, but these are relatively costly. Using an S-series reduction motor can reduce costs, but the gap created by the meshing gears can cause slight deviations when the rotation stops, resulting in inaccurate positioning. Summary of the Invention

[0003] The purpose of the present invention is to provide an auxiliary positioning mechanism to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, the auxiliary positioning mechanism of the present invention includes a mounting plate, a positioning mechanism and a sensing mechanism; a through hole is provided on the mounting plate, a rotating shaft is provided in the through hole, and the rotating shaft is connected to the motor; a rotating plate connected to the rotating shaft is provided at the upper end of the mounting plate;

[0005] The positioning mechanism includes a stopper and a mounting seat; the stopper is fixedly mounted on the mounting plate, and the side of the stopper away from the rotating axis is an arc surface; a V-shaped first slot is provided on the arc surface; the upper end of the mounting seat is fixedly connected to the rotating plate and the mounting seat is arranged on the side of the stopper away from the rotating axis, an opening is provided inside the mounting seat, a connecting shaft is slidably connected in the opening, an end is provided on the side of the connecting shaft extending out of the opening, and a contact block is installed on the end; the contact block can be snapped into the V-shaped first slot; a spring is provided in the opening on the side of the connecting shaft away from the stopper, and the spring presses the contact block; a groove is provided at the upper end of the connecting shaft, and a positioning pin connected to the mounting seat is provided in the groove.

[0006] Preferably, the center of the arcuate surface of the stopper is located at the rotation center of the rotation axis.

[0007] Furthermore, the end head is a U-shaped structure; the end head consists of an upper end piece in the horizontal direction, a middle end piece in the vertical direction and a lower end piece in the horizontal direction; the middle end piece is fixedly connected to the connecting shaft on the side away from the stop block, and fine holes are provided on the upper end piece and the lower end piece, the contact block is cylindrical, the contact block is provided with a through hole along the axial direction and the contact block is located between the upper end piece and the lower end piece, and a T-shaped first oil-free bushing is provided between the upper end piece and the contact block and between the lower end piece and the contact block, and the first oil-free bushing is socketed with the through hole; the hinge pin passes through the fine hole of the upper end piece, the first oil-free bushing between the upper end piece and the contact block, the through hole of the contact block, the first oil-free bushing between the lower end piece and the contact block, and the fine hole of the lower end piece in sequence and is fixed by a retaining ring.

[0008] Furthermore, both ends of the connecting shaft are sleeved with the second oil-free bushing, and the second oil-free bushing is fixed in the opening of the mounting seat.

[0009] Furthermore, the positioning pin is a positioning bolt, and the upper end of the mounting seat is provided with a first nut threadedly connected to the positioning bolt.

[0010] Furthermore, a pre-tightening bolt connected to the mounting seat is provided on a side of the spring away from the connecting shaft, and a second nut threadedly connected to the pre-tightening bolt is provided on a side of the mounting seat away from the spring.

[0011] The sensing mechanism includes a bracket connected to the mounting plate, and a first arc-shaped mounting hole and a second arc-shaped mounting hole are arranged in parallel on the bracket; the centers of the arcuate sides of the first arc-shaped mounting hole and the second arc-shaped mounting hole are both on the rotation center of the rotating shaft; a first proximity switch is provided at the front end of the first arc-shaped mounting hole; a third proximity switch is provided at the rear end of the first arc-shaped mounting hole; a second proximity switch connected to the second arc-shaped mounting hole is provided between the first contact switch and the third contact switch, and an L-shaped sensing block corresponding to the first proximity switch, the second proximity switch and the third proximity switch is provided on the rotating plate; the L-shaped sensing block consists of a long rod and a short rod, the long rod corresponds to the first proximity switch and the third proximity switch; the short rod corresponds to the second proximity switch.

[0012] Preferably, there are three groups of sensing mechanisms, which are respectively arranged on three sides of the mounting plate away from the positioning mechanism.

[0013] In addition, the first proximity switch, the second proximity switch, the third proximity switch and the motor are all connected to the PLC controller. The PLC controller is also connected to an alarm.

[0014] It's worth noting that when the long rod of the sensor block rotates with the rotating plate to the first proximity switch, the motor begins to decelerate, and the contact block begins to contact the curved surface of the stopper. When the short rod of the sensor block rotates with the rotating plate to the second proximity switch, the motor stops, and the contact block fits into the first slot of the stopper. When the long rod of the sensor block rotates with the rotating plate to the third proximity switch, it indicates that the motor has failed to stop as expected, and an alarm is issued. All of these operations are controlled by a PLC controller.

[0015] Beneficial effects

[0016] The auxiliary positioning mechanism of the present invention can accurately assist in positioning when the motor stops and monitor the positioning situation; it has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the auxiliary positioning mechanism.

[0018] Figure 2 Schematic diagram of the external structure of the positioning mechanism.

[0019] Figure 3 Schematic diagram of the internal structure of the positioning mechanism.

[0020] Figure 4 Schematic diagram of the structure of the sensing mechanism. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs. The words "including" and similar words used in this article mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0022] In view of the problems existing in the prior art, an embodiment of the present invention provides an auxiliary positioning mechanism.

[0023] Example

[0024] An auxiliary positioning mechanism includes a mounting plate 1, a positioning mechanism 2, and a sensing mechanism 3; the mounting plate 1 is provided with a through hole, a rotating shaft 4 is provided in the through hole, and the rotating shaft 4 is connected to a motor (not shown in the figure); a rotating plate (not shown in the figure) connected to the rotating shaft 4 is provided at the upper end of the mounting plate 1;

[0025] The positioning mechanism 2 includes a stopper 5 and a mounting seat 6; the stopper 5 is fixedly mounted on the mounting plate 1, and the side of the stopper 5 away from the rotating shaft 4 is an arc surface; a V-shaped first slot 7 is provided on the arc surface; the upper end of the mounting seat 6 is fixedly connected to the rotating plate and the mounting seat 6 is arranged on the side of the stopper 5 away from the rotating shaft 4, an opening is provided inside the mounting seat 6, a connecting shaft 8 is slidably connected in the opening, an end head 9 is provided on the side of the connecting shaft 8 extending out of the opening, a contact block 10 is installed on the end head 9; the contact block 10 can be snapped into the V-shaped first slot 7; a spring 11 is provided in the opening on the side of the connecting shaft 8 away from the stopper 5, and the spring 11 presses the contact block 10; a groove 12 is provided at the upper end of the connecting shaft 8, a positioning pin 13 connected to the mounting seat is provided in the groove 12.

[0026] The center of the arcuate surface of the stopper 5 is located at the rotation center of the rotating shaft 4 .

[0027] The end 9 is in U-shaped structure; the end 9 is composed of an upper end piece 91 in horizontal direction, a middle end piece 92 in vertical direction and a lower end piece 93 in horizontal direction; the middle end piece 92 is fixedly connected with the connecting shaft 8 at the side far away from the stop block 5; the upper end piece 91 and the lower end piece 93 are both provided with precision holes; the contact block 10 is in cylindrical shape and is provided with a through hole in axial direction and is located between the upper end piece 91 and the lower end piece 93; the first oil-free bushing 14 in T-shaped structure is arranged between the upper end piece 91 and the contact block 10 and between the lower end piece 93 and the contact block 10 and is sleeved with the through hole; the hinge pin 15 is fixed by the clasp 16 after sequentially penetrating through the precision hole of the upper end piece 91, the first oil-free bushing 14 between the upper end piece 91 and the contact block 10, the through hole of the contact block 10, the first oil-free bushing 14 between the lower end piece 93 and the contact block 10 and the precision hole of the lower end piece 93.

[0028] The connecting shaft 8 is sleeved with the second oil-free bushing 17 at both ends and the second oil-free bushing 17 is fixed in the opening of the mounting seat 6.

[0029] The positioning pin 13 is a positioning bolt; the upper end of the mounting seat 6 is provided with the first nut 18 threadedly connected with the positioning bolt.

[0030] The side of the spring 11 far away from the connecting shaft 8 is provided with the pre-tightening bolt 19 connected with the mounting seat 6; the side of the mounting seat 6 far away from the spring 11 is provided with the second nut 20 threadedly connected with the pre-tightening bolt 19.

[0031] The induction mechanism 3 comprises the bracket 31 connected with the mounting plate 1; the first arc-shaped mounting hole 32 and the second arc-shaped mounting hole 33 are arranged in parallel on the bracket 31; the centers of the arc-shaped edges of the first arc-shaped mounting hole 32 and the second arc-shaped mounting hole 33 are on the rotation center of the rotating shaft 4; the front end of the first arc-shaped mounting hole 31 is provided with the first proximity switch 34; the rear end of the first arc-shaped mounting hole 31 is provided with the third proximity switch 35; the second proximity switch 36 connected with the second arc-shaped mounting hole 33 is arranged between the first proximity switch 34 and the third proximity switch 35; the L-shaped induction block 37 corresponding to the first proximity switch 34, the second proximity switch 36 and the third proximity switch 35 is arranged on the rotating plate; the L-shaped induction block 37 is composed of a long rod and a short rod; the long rod corresponds to the first proximity switch 34 and the third proximity switch 35; the short rod corresponds to the second proximity switch 36.

[0032] The induction mechanism 3 is provided with three groups and is arranged on the three sides of the mounting plate 1 far away from the positioning mechanism 2.

[0033] The first proximity switch 34, the second proximity switch 36, the third proximity switch 35 and the motor are connected with the PLC controller (not shown in the figure); the PLC controller is further connected with the alarm (not shown in the figure).

[0034] When the auxiliary positioning mechanism of this embodiment is working, the motor drives the rotating shaft 4 to rotate, and then drives the rotating plate to rotate; when the long rod of the sensing block 37 rotates with the rotating plate to the first proximity switch 34, the motor begins to decelerate, and at the same time, the contact block 10 begins to contact the arc surface of the block 5; at the same time, the connecting shaft 8 compresses the spring 11; when the short rod of the sensing block 37 rotates with the rotating plate to the second proximity switch 36, the motor stops, and at the same time, the contact block 10 is just stuck in the first slot 7 of the block under the elastic force of the spring 11; when the long rod of the sensing block 37 rotates with the rotating plate to the third proximity switch 35, it means that the motor has failed and the expected stop is not achieved, and an alarm is issued. The above operations are all controlled by the PLC controller. This embodiment can accurately assist in positioning when the motor stops, and can monitor the positioning situation.

[0035] While the embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations of these embodiments are possible. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the claims. Furthermore, the invention described herein is susceptible to other embodiments and may be practiced or implemented in a variety of ways.

Claims

1. An auxiliary positioning mechanism, characterized in that: The auxiliary positioning mechanism includes a mounting plate and a positioning mechanism; a through hole is provided on the mounting plate, a rotating shaft is provided in the through hole, and the rotating shaft is connected to the motor; a rotating plate connected to the rotating shaft is provided at the upper end of the mounting plate; The positioning mechanism includes a stopper and a mounting seat; the stopper is fixedly mounted on the mounting plate, and the side of the stopper away from the rotating axis is an arc surface; a V-shaped first slot is provided on the arc surface; the upper end of the mounting seat is fixedly connected to the rotating plate and the mounting seat is arranged on the side of the stopper away from the rotating axis, an opening is provided inside the mounting seat, a connecting shaft is slidably connected in the opening, an end is provided on the side of the connecting shaft extending out of the opening, and a contact block is installed on the end; the contact block can be snapped into the V-shaped first slot; a spring is provided in the opening on the side of the connecting shaft away from the stopper, and the spring presses the contact block; a groove is provided at the upper end of the connecting shaft, and a positioning pin connected to the mounting seat is provided in the groove; The positioning pin is a positioning bolt, and the upper end of the mounting seat is provided with a first nut threadedly connected to the positioning bolt; A pre-tightening bolt connected to the mounting seat is provided on the side of the spring away from the connecting shaft, and a second nut threadedly connected to the pre-tightening bolt is provided on the side of the mounting seat away from the spring; The auxiliary positioning mechanism also includes a sensing mechanism; the sensing mechanism includes a bracket connected to the mounting plate, and a first arc-shaped mounting hole and a second arc-shaped mounting hole are provided on the bracket in parallel; the centers of the arcuate sides of the first arc-shaped mounting hole and the second arc-shaped mounting hole are both on the rotation center of the rotating shaft; a first proximity switch is provided at the front end of the first arc-shaped mounting hole; a third proximity switch is provided at the rear end of the first arc-shaped mounting hole; a second proximity switch connected to the second arc-shaped mounting hole is provided between the first contact switch and the third contact switch, and an L-shaped sensing block corresponding to the first proximity switch, the second proximity switch and the third proximity switch is provided on the rotating plate; the L-shaped sensing block is composed of a long rod and a short rod, and the long rod corresponds to the first proximity switch and the third proximity switch; The short rod corresponds to the second proximity switch; The first proximity switch, the second proximity switch, the third proximity switch and the motor are all connected to the PLC controller; The PLC controller is also connected to an alarm.

2. The auxiliary positioning mechanism according to claim 1, characterized in that: The center of the arcuate surface of the stopper is located at the rotation center of the rotation shaft.

3. The auxiliary positioning mechanism according to claim 2, characterized in that: The end head has a U-shaped structure; the end head consists of an upper end piece in the horizontal direction, a middle end piece in the vertical direction and a lower end piece in the horizontal direction; the middle end piece is fixedly connected to the connecting shaft on the side away from the stop block, and fine holes are provided on the upper end piece and the lower end piece. The contact block is cylindrical, and a through hole is provided in the axial direction of the contact block and the contact block is located between the upper end piece and the lower end piece. A T-shaped first oil-free bushing is provided between the upper end piece and the contact block and between the lower end piece and the contact block, and the first oil-free bushing is socketed with the through hole; the hinge pin passes through the fine hole of the upper end piece, the first oil-free bushing between the upper end piece and the contact block, the through hole of the contact block, the first oil-free bushing between the lower end piece and the contact block, and the fine hole of the lower end piece in sequence and is fixed by a retaining ring.

4. The auxiliary positioning mechanism according to claim 3, characterized in that: Both ends of the connecting shaft are sleeved with the second oil-free bushing, and the second oil-free bushing is fixed in the opening of the mounting seat.

5. The auxiliary positioning mechanism according to claim 4, characterized in that: There are three groups of sensing mechanisms, which are respectively arranged on three side surfaces of the mounting plate away from the positioning mechanism.

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