Large-bearing high-precision positioning and locking device

Abstract

The invention discloses a large-bearing high-precision positioning and locking device, which relates to the technical field of positioning mechanisms and comprises a supporting seat, a dense ball seat is fixedly mounted at the rear end of the supporting seat, a plurality of supporting bearings are fixedly mounted in the front end of the supporting seat, and a plurality of bearing dense ball retainers are fixedly mounted in the dense ball seat. A dense ball bearing is arranged on the dense ball seat, dense ball bearing retainers are arranged on the dense ball seat, dense ball bearing retainers are movably arranged on the dense ball bearing retainers, dense ball bearing retainers are movably arranged between the two dense ball bearing retainers, a telescopic rod is transversely and slidably arranged in the dense ball seat, and a limiting sliding groove is formed in the outer ring of the telescopic rod and is in rolling fit with the dense ball bearing. Large-bearing positioning is facilitated; the bearing dense balls can prevent the telescopic rod from shaking during working, and breakage of the telescopic rod caused by metal fatigue generated by shaking is prevented; whether the telescopic rod deflects or not can be detected in time through the detection top plate and the detection sliding rod, and equipment faults can be found in time.

Description

Technical Field

[0001] The invention relates to the technical field of positioning mechanisms, and in particular to a large-load-bearing and high-precision positioning and locking device. Background Art

[0002] For field vehicle-mounted test turntable equipment, the turntable shaft system may shake during the movement of the vehicle. In order to keep the turntable shaft system fixed during the movement of the vehicle, a locking device is often added to the shaft system. The guide part of the conventional locking device often has a gap for smooth sliding. This causes the shaking shaft system to impact the locking guide pair, causing locking failures such as loosening of the lock or fatigue fracture of the locking rod.

[0003] A Chinese invention patent application with publication number CN104454777A discloses a precise positioning locking device, which is composed of a power drive mechanism and a limit mechanism; the power drive mechanism includes a locating pin, a retaining ring, a linear bearing mounting seat, a linear bearing, a spacer, a connecting flange, an end cover, a cylinder head, a cylinder and a cylinder mounting seat, and the limit mechanism includes a track bearing, a limit shaft, a track bearing mounting seat and a fixed seat. The invention can be installed on various equipment according to actual application requirements to meet the precise positioning requirements of the equipment; the invention is driven by a cylinder, has the advantages of flexibility, convenience and high positioning accuracy, and can be installed arbitrarily according to work needs.

[0004] However, the invention is driven by a cylinder, which makes it difficult to position large loads. It also requires high precision in parts processing. It is difficult to detect faults in the equipment in a timely manner during operation, which can easily leave safety hazards.

[0005] In view of the above technical problems, the present invention provides a large-load-bearing and high-precision positioning and locking device to solve the problems in the above background technology. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a large-load-bearing and high-precision positioning and locking device, which comprises a support seat, a bead seat is fixedly installed at the rear end of the support seat, a telescopic rod is laterally slidably installed in the bead seat, a plurality of support bearings are fixedly installed inside the front end of the support seat, a rotating input shaft is fixedly installed on the inner ring of the support bearing, the rotating input shaft is driven by an external servo motor, a plurality of load-bearing bead retaining frames are fixedly installed in the bead seat, load-bearing beads are rotatably installed between two load-bearing bead retaining frames, the load-bearing beads are evenly arranged between the load-bearing bead retaining frames, the rotation direction of the load-bearing beads in the load-bearing bead retaining frames is perpendicular to the axis of the bead seat, the bead seat, the load-bearing bead retaining frame and the load-bearing beads cooperate to form a linear bearing, the outer ring of the telescopic rod is provided with a limiting slide groove, the limiting slide groove and the load-bearing beads are rollingly cooperated to support and guide the telescopic rod.

[0007] Furthermore, the inner ring of the rear end of the rotating input shaft is provided with a thread, and the outer ring of the front end of the telescopic rod is provided with a thread. The rotating input shaft and the telescopic rod screw cooperate to control the rotation of the rotating input shaft to drive the telescopic rod to slide horizontally in the support seat to realize linear telescopic motion, thereby realizing high-precision positioning function.

[0008] Furthermore, a detection top plate is fixedly installed in the middle of the rotation input shaft, a detection sliding rod is provided on the ball joint at the rear end of the detection top plate, a detection sliding groove is provided at the front end of the telescopic rod, the detection sliding rod slides in cooperation with the detection sliding groove, detection contact points are provided inside the detection top plate and at the top end of the detection sliding rod, and they contact each other correspondingly, and when the detection sliding rod flips an angle on the detection top plate, the detection sliding rod disconnects from the corresponding detection contact point on the detection top plate and contacts with other detection contacts, thereby detecting whether the detection sliding rod is deflected.

[0009] Furthermore, a liquid storage sponge is fixedly installed between the rotating input shaft and the bead seat, a plurality of lubricant circulation pipes are fixedly installed on both sides of the support seat, a lubricant circulation pump is fixedly installed at the bottom of the support seat, and the other end of the lubricant circulation pipe is fixedly connected to the lubricant circulation pump.

[0010] Furthermore, a rack groove is provided on the right side of the telescopic rod, a monitoring support rod is fixedly installed on the right side of the support seat, a monitoring gear is rotatably installed on one end of the monitoring support rod, and the monitoring gear is engaged with the limiting slide groove to monitor the telescopic rod.

[0011] Furthermore, a bearing limiting hollow rod is fixedly installed between the support bearings, and the bearing limiting hollow rod is fixedly installed on the inner ring and the outer ring of the support bearing.

[0012] Furthermore, a compression spring is fixedly installed between the rear end of the detection sliding rod and the front end of the telescopic rod, and the compression spring is used to control the threads between the rotation input shaft and the telescopic rod to fit tightly.

[0013] Furthermore, the rotation input shaft is driven by an external servo motor.

[0014] Furthermore, the lubricant circulation pump is connected to an external liquid storage tank through a pipeline.

[0015] Compared with the prior art, the present invention has the following advantages: (1) The present invention supports the telescopic rod by means of a load-bearing bead linear bearing, which greatly improves the lateral force-bearing capacity of the telescopic rod and facilitates large-load positioning; (2) The load-bearing bead of the present invention can prevent the telescopic rod from shaking during operation, thereby preventing the telescopic rod from breaking due to metal fatigue caused by the shaking; (3) The present invention inputs circulating lubricant into the support seat through a lubricant circulation pump, thereby cooling the support seat during operation, and the lubricant can ensure the accuracy of the support seat during operation; (4) The present invention can timely detect whether the telescopic rod is deflected by detecting the top plate and the sliding rod, thereby facilitating timely detection of equipment failure and avoiding large losses caused by equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the structure on the right side of the present invention.

[0018] Figure 3 It is a schematic diagram of the overall half-section structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the left half-section structure of the present invention.

[0020] Figure 5 It is a schematic diagram of the overall bottom structure of the present invention.

[0021] Figure markings: 1-support seat; 2-support bearing; 3-rotation input shaft; 4-telescopic rod; 5-bead seat; 6-bearing bead retaining frame; 7-bearing bead; 8-bearing limit hollow rod; 9-detection top plate; 10-detection sliding rod; 11-detection slide groove; 12-liquid storage sponge; 13-monitoring gear; 14-limiting slide groove; 15-lubricant circulation pipe; 16-lubricant circulation pump; 17-rack groove; 18-monitoring support rod. DETAILED DESCRIPTION

[0022] The technical solution provided by the present invention is further described below in conjunction with the accompanying drawings and according to specific implementation methods.

[0023] like Figure 1 to Figure 5As shown, a large-load high-precision positioning and locking device comprises a support seat 1, a bead seat 5 is fixedly installed at the rear end of the support seat 1, a telescopic rod 4 is installed in the bead seat 5 for transverse sliding, a plurality of support bearings 2 are fixedly installed inside the front end of the support seat 1, a rotating input shaft 3 is fixedly installed on the inner ring of the support bearing 2, and the rotating input shaft 3 is driven by an external servo motor, a plurality of load-bearing bead retaining frames 6 are fixedly installed in the bead seat 5, a load-bearing bead 7 is rotatably installed between two load-bearing bead retaining frames 6, the load-bearing bead 7 is evenly arranged between the load-bearing bead retaining frames 6, and the load-bearing bead 7 is arranged between the load-bearing bead retaining frames 6. The rotation direction in the retaining frame 6 is perpendicular to the axis of the bead seat 5. The bead seat 5, the bearing bead retaining frame 6 and the bearing bead 7 cooperate to form a linear bearing. The outer ring of the telescopic rod 4 is provided with a limiting slide groove 14. The limiting slide groove 14 and the bearing bead 7 roll together to support and guide the telescopic rod 4. The bearing bead 7 can prevent the telescopic rod 4 from shaking during the sliding process, and avoid metal fatigue of the telescopic rod 4 due to shaking, which may lead to the breakage of the telescopic rod 4. At the same time, the support of the bearing bead 7 greatly enhances the ability of the telescopic rod 4 to withstand lateral pressure, thereby improving the bearing capacity of the telescopic rod 4.

[0024] like Figure 1 to Figure 5 As shown, the inner ring of the rear end of the rotation input shaft 3 is provided with a thread, and the outer ring of the front end of the telescopic rod 4 is provided with a thread. The rotation input shaft 3 and the telescopic rod 4 screw rod cooperate, and the rotation input shaft 3 is driven by an external servo motor to rotate in the support base 1. The rotation of the rotation input shaft 3 drives the telescopic rod 4 to slide horizontally in the support base 1 to realize linear telescopic motion.

[0025] like Figure 1 to Figure 5 As shown, a detection top plate 9 is fixedly installed in the middle of the rotating input shaft 3, a detection sliding rod 10 is provided at the ball joint at the rear end of the detection top plate 9, a detection slide groove 11 is provided at the front end of the telescopic rod 4, the detection sliding rod 10 slides in cooperation with the detection slide groove 11, the detection top plate 9 and the detection sliding rod 10 are used to detect whether the telescopic rod 4 shakes or deflects during operation, detection contact points are provided inside the detection top plate 9 and at the top of the detection sliding rod 10, and they contact each other correspondingly, when the detection sliding rod 10 flips at an angle on the detection top plate 9, the detection sliding rod 10 disconnects from the corresponding detection contact point on the detection top plate 9, and contacts with other detection contacts, so as to detect whether the detection sliding rod 10 is deflected, and detect the deflection angle of the detection sliding rod 10, so as to timely discover the abnormality of the telescopic rod 4 and carry out maintenance, thereby improving the safety of the equipment.

[0026] like Figure 1 to Figure 5 As shown, a compression spring is fixedly installed between the rear end of the detection sliding rod 10 and the front end of the telescopic rod 4. The compression spring between the detection sliding rod 10 and the telescopic rod 4 is used to control the threads between the rotating input shaft 3 and the telescopic rod 4 to fit tightly, thereby improving the positioning accuracy of the telescopic rod 4 during operation.

[0027] like Figure 1 to Figure 5 As shown, a liquid storage sponge 12 is fixedly installed between the rotating input shaft 3 and the bead seat 5. The liquid storage sponge 12 is used to cache lubricant and lubricate it during the operation of the equipment so that the equipment can maintain a high working accuracy. A plurality of lubricant circulation pipes 15 are fixedly installed on both sides of the support seat 1. The lubricant circulation pipe 15 is used to infuse lubricant into the inside of the support seat 1. The lubricant penetrates into it through the gap between the load-bearing bead retainer 6 and the support bearing 2 to lubricate it. A lubricant circulation pump 16 is fixedly installed at the bottom of the support seat 1. The other end of the lubricant circulation pipe 15 is fixedly connected to the lubricant circulation pump 16. The lubricant circulation pump 16 is connected to an external liquid storage tank through a pipeline. The lubricant circulation pump 16 is used to circulate the lubricant in the support seat 1 when the equipment is working to cool the equipment. At the same time, the lubricant in the circulation process carries out the lubricant waste liquid generated when the equipment is working to prevent the lubricant waste liquid from hindering the operation of the equipment and improve the smoothness and accuracy of the equipment when it is working.

[0028] like Figure 1 to Figure 5 As shown, a rack groove 17 is provided on the right side of the telescopic rod 4, and a monitoring support rod 18 is fixedly installed on the right side of the support seat 1. A monitoring gear 13 is rotatably installed on one end of the monitoring support rod 18. The monitoring gear 13 is engaged with the limiting slide groove 14. The monitoring gear 13 is used to monitor the sliding distance of the telescopic rod 4 in the support seat 1, and compare it with the extended length of the telescopic rod 4 when the equipment is working, so as to detect whether the telescopic rod 4 is deformed during work, so as to facilitate its timely replacement.

[0029] like Figure 1 to Figure 5 As shown, a bearing limiting hollow rod 8 is fixedly installed between the support bearings 2. The bearing limiting hollow rod 8 is fixedly installed on the inner ring and the outer ring of the support bearing 2. The bearing limiting hollow rod 8 is used to control the distance between the two support bearings 2 to prevent the support bearings 2 from shifting during operation, and at the same time to guide the lubricant inside the support seat 1 so that the lubricant can lubricate the support bearing 2 at the front end of the support seat 1.

[0030] Working principle: When the equipment is enabled, the external servo motor is started to drive the rotary input shaft 3 to rotate in the support seat 1, and the rotary input shaft 3 is rotated to drive the telescopic rod 4 to make a horizontal linear sliding motion in the bead seat 5. The screw rod cooperation between the rotary input shaft 3 and the telescopic rod 4 can more accurately control the sliding distance of the telescopic rod 4. During the sliding process of the telescopic rod 4, the movement gap of the spiral pair is eliminated by the bearing bead 7, which avoids the shaking of the telescopic rod 4 in the bead seat 5 during the movement, and the bearing bead 7 is used to fully improve the lateral force bearing capacity of the telescopic rod 4, thereby greatly improving the bearing capacity of the telescopic rod 4.

[0031] During the movement of the telescopic rod 4, the monitoring gear 13 cooperating with the telescopic rod 4 detects the sliding distance and compares it with the distance extended outside the telescopic rod 4 to detect whether the telescopic rod 4 is deformed, so as to find faults in time and replace them.

[0032] During the operation of the telescopic rod 4, the detection sliding rod 10 is used to detect whether the telescopic rod 4 is offset and rotated. When the weight carried by the telescopic rod 4 exceeds the safe range and causes the telescopic rod 4 to be offset, the detection sliding rod 10 is driven to rotate slightly in the detection top plate 9, and the offset angle of the telescopic rod 4 is detected by the detection contacts on the detection top plate 9 and the detection sliding rod 10, so as to facilitate timely detection and stoppage of work, thereby preventing equipment failure from causing large losses.

[0033] During the operation of the equipment, the lubricating oil in the support seat 1 is circulated by the lubricant circulation pump 16 to lubricate the support bearing 2 and the load-bearing beads 7, cool the support seat 1, and discharge the waste liquid to ensure the accuracy of the equipment during operation.

Claims

1. A high-load and high-precision positioning and locking device, comprising a support seat (1), characterized in that: A bead seat (5) is fixedly installed at the rear end of the support seat (1), a plurality of support bearings (2) are fixedly installed inside the front end of the support seat (1), a rotating input shaft (3) is fixedly installed on the inner ring of the support bearing (2), a plurality of load-bearing bead retaining frames (6) are fixedly installed inside the bead seat (5), a load-bearing bead (7) is movably installed between two load-bearing bead retaining frames (6), a telescopic rod (4) is horizontally slidably installed inside the bead seat (5), a limiting slide groove (14) is provided on the outer ring of the telescopic rod (4), and the limiting slide groove (14) and the load-bearing bead (7) are rollingly matched.

2. A high-load, high-precision positioning and locking device according to claim 1, characterized in that: The inner ring at the rear end of the rotation input shaft (3) is provided with a thread, the outer ring at the front end of the telescopic rod (4) is provided with a thread, and the rotation input shaft (3) and the telescopic rod (4) are screwed together.

3. A high-load and high-precision positioning and locking device according to claim 1, characterized in that: A detection top plate (9) is fixedly installed in the middle of the rotating input shaft (3), a detection sliding rod (10) is provided at a ball joint at the rear end of the detection top plate (9), a detection sliding groove (11) is provided at the front end of the telescopic rod (4), and the detection sliding rod (10) is slidably matched with the detection sliding groove (11).

4. A high-load, high-precision positioning and locking device according to claim 1, characterized in that: A liquid storage sponge (12) is fixedly mounted between the rotating input shaft (3) and the bead seat (5); a plurality of lubricant circulation pipes (15) are fixedly mounted on both sides of the support seat (1); a lubricant circulation pump (16) is fixedly mounted on the bottom of the support seat (1); and the other end of the lubricant circulation pipe (15) is fixedly connected to the lubricant circulation pump (16).

5. A high-precision positioning and locking device with a large load capacity according to claim 1, characterized in that: The right side of the telescopic rod (4) is provided with a rack groove (17), the right side of the support seat (1) is fixedly mounted with a monitoring support rod (18), one end of the monitoring support rod (18) is rotatably mounted with a monitoring gear (13), and the monitoring gear (13) is meshed with the limiting slide groove (14).

6. A high-load and high-precision positioning and locking device according to claim 1, characterized in that: A bearing limiting hollow rod (8) is fixedly mounted between the two support bearings (2), and the bearing limiting hollow rod (8) is fixedly mounted on the inner ring and the outer ring of the support bearing (2).

7. A high-load and high-precision positioning and locking device according to claim 3, characterized in that: A compression spring is fixedly installed between the front end of the telescopic rod (4) and the rear end of the detection sliding rod (10).

8. The high-load and high-precision positioning and locking device according to claim 1, characterized in that: The rotary input shaft (3) is driven by an external servo motor.

9. A high-load, high-precision positioning and locking device according to claim 4, characterized in that: The lubricant circulation pump (16) is connected to an external liquid storage tank through a pipeline.

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