Round rod clamping spring sleeve tensioning device capable of improving precision in automatic machining

Abstract

The utility model relates to a round bar clip spring sleeve tensioning device capable of improving precision in automatic processing, which comprises a clip spring sleeve, a base body and a fixing mechanism, one end of the clip spring sleeve is positioned at the head of the base body, the other end of the clip spring sleeve is arranged in a round hole in the center of the base body and close to the tail of the base body, and the fixing mechanism comprises an adjusting screw, a transition sleeve and a ball sleeve. A through hole is formed in the clamping spring sleeve in the axis direction to clamp a round bar, the ball sleeve is arranged on the clamping spring sleeve in a sleeving mode, the transition sleeve is located in the base body and tightly attached to the outer side of the ball sleeve, a screw hole leading to the transition sleeve is formed in the surface of the base body, threads matched with the adjusting screw are arranged in the screw hole, and the adjusting screw penetrates through the screw hole to abut against the transition sleeve. According to the round bar clamping spring sleeve tensioning device capable of improving the precision in automatic machining, the clamping stability can be improved, the concentric jumping precision can be improved, the reliability of automatic machining can be improved, the stability of the machining size can be guaranteed, and the machining tolerance can be further reduced.

Description

Technical Field

[0001] The utility model relates to the field of automated processing, in particular to a round bar clamp spring sleeve tensioning device for improving the precision in automated processing. Background Art

[0002] When automatically processing round bars, the round bars are usually clamped with a clamp spring sleeve. The existing clamping method is to apply pressure directly to the clamp spring sleeve from the side through the adjustment screw. After adjusting the accuracy, during the frequent sliding, tightening and loosening process, the clamping stability is insufficient due to the small support point of the adjustment screw and the thread gap. The clamping jump gradually increases, and the clamping change is 0.015mm every 100 times. Therefore, it is impossible to accurately adjust the round bar size. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a round bar clamp spring sleeve tensioning device with improved precision in automatic processing, thereby improving the stability of clamping and the precision of concentric runout.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A round rod clamp spring sleeve tensioning device for improving precision in automatic processing, comprising a clamp spring sleeve, a base and a fixing mechanism, one end of the clamp spring sleeve is located at the head of the base, the other end of the clamp spring sleeve is arranged in a circular hole in the center of the base near the tail of the base, the fixing mechanism comprises an adjusting screw, a transition sleeve and a ball sleeve, the clamp spring sleeve is provided with a through hole along the axial direction to clamp the round rod, the ball sleeve is arranged on the clamp spring sleeve, the transition sleeve is located in the base and is arranged close to the outer side of the ball sleeve, a screw hole leading to the transition sleeve is provided on the surface of the base, a thread matching the adjusting screw is provided in the screw hole, and the adjusting screw passes through the screw hole and abuts against the transition sleeve.

[0006] As a preferred technical solution, the ball sleeve is tubular, the tube wall of the ball sleeve is a double-layer structure, a gap is provided between the double-layer tube walls, a number of balls are arranged in the gap, and a number of perforations evenly arranged circumferentially are provided on the tube wall of the ball sleeve, and the spherical surface of the ball passes through the perforations on the inner and outer sides of the tube wall of the ball sleeve.

[0007] As a preferred technical solution, the diameter of the perforation is smaller than the diameter of the ball.

[0008] As a preferred technical solution, the ball and the clamp spring sleeve are interference fit.

[0009] As an optimal technical solution, a strip opening and an installation opening are provided in the base body, which match the transition sleeve and the ball sleeve respectively. The strip opening is connected to the installation opening, the transition sleeve is slidably connected to the strip opening, and the ball sleeve is slidably connected to the installation opening.

[0010] As a preferred technical solution, the head of the base is in the shape of a truncated cone, and the tail is in the shape of a cylinder. The size of the circle at the bottom of the cylinder is smaller than the size of the bottom of the truncated cone. The cross-sectional shape of the clamp spring sleeve at one end of the base head is hexagonal, and the circular hole at one end of the base head is in a shape that fits the hexagonal end of the clamp spring sleeve.

[0011] As a preferred technical solution, there are several adjusting screws and transition sleeves in one-to-one correspondence, and the adjusting screws and transition sleeves are evenly arranged circumferentially around the central axis of the base.

[0012] As an optimal technical solution, a tension rod is provided in the circular hole at the tail of the base body, the tension rod is slidably connected to the circular hole, a toothed opening is provided at the center of the tension rod, and the tail of the clamping spring sleeve is provided with teeth matching the toothed opening so as to be clamped in the tension rod.

[0013] As an optimal technical solution, a fixing screw hole is provided on the tail of the base, a screw is provided in the fixing screw hole, a thread matching the screw is provided in the fixing screw hole, a fixing groove is provided on the outer surface of the tension rod, and the screw passes through the screw hole and rests against the inner wall of the fixing groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model discloses a round bar clamp spring sleeve tensioning device for improving the precision in automatic processing. By setting a transition sleeve and a ball sleeve, the point contact between the adjusting screw and the clamp spring sleeve is changed into a multi-point surface contact with a plurality of balls and the clamp spring sleeve with interference fit, thereby improving the stability of the clamp spring sleeve clamping the round bar, thereby improving the concentric runout accuracy, from the original change of 0.015mm per 100 clamping times to 0.003mm per 100 clamping times. The original round bar sliding in the clamp spring sleeve is changed to the rolling operation of the interference fit ball, which reduces the friction and the micron-level gap. The use of this device is conducive to improving the reliability of automated processing, ensuring the stability of the processing size, and further reducing the processing tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a round bar clamp spring sleeve tensioning device for improving precision in automatic processing.

[0017] In the figure: 1. Clamp spring sleeve; 2. Base body; 3. Ball sleeve; 4. Transition sleeve; 5. Adjustment screw; 6. Tension rod. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with specific implementation methods:

[0019] like Figure 1As shown, a tensioning device for a round rod clamp spring sleeve 1 with improved precision in automatic processing comprises a clamp spring sleeve 1, a base 2 and a fixing mechanism. The base 2 is in a truncated cone shape at the head and in a cylindrical shape at the tail. The size of the bottom circle of the cylinder is smaller than the size of the bottom of the truncated cone. The cross-sectional shape of one end of the clamp spring sleeve 1 is hexagonal and is located at the head of the base 2. The base 2 is provided with a circular hole along the central axis direction. The shape of one end of the circular hole located at the head of the base 2 is fitted with the hexagonal end of the clamp spring sleeve 1, and the other end of the clamp spring sleeve 1 is arranged in the circular hole near the tail of the base 2.

[0020] The fixing mechanism includes an adjusting screw 5, a transition sleeve 4 and a ball sleeve 3. The clamp spring sleeve 1 is provided with a through hole along the axial direction to clamp the round rod. The ball sleeve 3 is sleeved on the clamp spring sleeve 1. The transition sleeve 4 is located in the base 2 and is arranged close to the outer side of the ball sleeve 3. The surface of the base 2 is provided with a screw hole leading to the transition sleeve 4. The screw hole is provided with a thread matching the adjusting screw 5. The adjusting screw 5 passes through the screw hole and abuts against the transition sleeve 4. By tightening the adjusting screw 5, the force is transmitted to the ball sleeve 3 through the transition sleeve 4, and the ball is interference-fitted with the clamp spring sleeve 1, thereby improving the stability of clamping the round rod.

[0021] The ball sleeve 3 is tubular, and the tube wall of the ball sleeve 3 is a double-layer structure. There is a gap between the double-layer tube walls, and a number of balls are arranged in the gap. The tube wall of the ball sleeve 3 is provided with a number of perforations evenly arranged in the circumferential direction. The perforations on the double-layer tube wall are arranged opposite to each other and just clamp a ball. The spherical surface of the ball passes through the perforations on the inner and outer sides of the ball sleeve tube wall, and the inner side contacts the clamp spring sleeve, and the outer side contacts the transition sleeve 4. The ball and the double-layer tube wall of the ball sleeve 3 can be clearance fit so that the ball jumps inward; or it can be interference fit to fix the position of the ball so that the ball can only rotate in place. The diameter of the perforation is smaller than the diameter of the ball, so as to prevent the ball from escaping from the ball sleeve 3.

[0022] The base body 2 is provided with a strip opening and an installation opening which match the transition sleeve 4 and the ball sleeve 3 respectively. The strip opening is communicated with the installation opening, the transition sleeve 4 is slidably connected with the strip opening, and the ball sleeve 3 is slidably connected with the installation opening. When the round rod and the clamp spring sleeve 1 are stretched in and out of the round hole, the transition sleeve 4 and the ball sleeve 3 slide in the strip opening and the installation opening accordingly, thereby adjusting the fixed position.

[0023] In this embodiment, there are four adjusting screws 5 and transition sleeves 4, which correspond to each other. The four adjusting screws 5 and transition sleeves 4 are evenly arranged around the central axis of the base 2, so that the force on the round rod in all directions is more uniform and the clamping is more stable.

[0024] A tension rod 6 is provided at the tail of the circular hole of the base 2, and the tension rod 6 is slidably connected to the circular hole. A toothed opening is provided at the center of the tension rod 6, and a tooth pattern matching the toothed opening is provided at the tail of the clamp spring sleeve 1. The tail of the clamp spring sleeve 1 is fixed in the toothed opening of the tension rod 6 through the tooth pattern. The tension rod 6 is connected to a hydraulic device of an external device to lift and retract the clamped round rod through the tension rod and the clamp spring sleeve 1.

[0025] A fixing screw hole is provided on the tail of the base 2, a screw is provided in the fixing screw hole, a thread matching the screw is provided in the fixing screw hole, a fixing groove is provided on the outer surface of the tension rod 6, the screw passes through the screw hole and abuts against the inner wall of the fixing groove to fix the tension rod 6.

[0026] This embodiment is only a further explanation of the utility model, not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the scope of the claims of the utility model, it will be protected by the patent law.

Claims

1. A round bar clamp spring sleeve tensioning device for improving precision in automatic processing, characterized in that: It includes a clamping spring sleeve, a base and a fixing mechanism, one end of the clamping spring sleeve is located at the head of the base, and the other end of the clamping spring sleeve is arranged in a circular hole in the center of the base near the tail of the base, the fixing mechanism includes an adjusting screw, a transition sleeve and a ball sleeve, the clamping spring sleeve is provided with a through hole along the axial direction to clamp the round rod, the ball sleeve is arranged on the clamping spring sleeve, the transition sleeve is located in the base and is arranged close to the outer side of the ball sleeve, the surface of the base is provided with a screw hole leading to the transition sleeve, the screw hole is provided with a thread matching the adjusting screw, and the adjusting screw passes through the screw hole and abuts against the transition sleeve.

2. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 1, characterized in that: The ball sleeve is tubular, and the tube wall of the ball sleeve is a double-layer structure. A gap is provided between the double-layer tube walls, and a plurality of balls are arranged in the gap. The tube wall of the ball sleeve is provided with a plurality of circumferentially evenly arranged perforations, and the spherical surface of the ball passes through the perforations on the inner and outer sides of the tube wall of the ball sleeve.

3. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 2, characterized in that: The diameter of the through hole is smaller than the diameter of the ball.

4. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 2, characterized in that: The ball is interference fit with the clamp spring sleeve.

5. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 1, characterized in that: The base body is provided with a strip opening and an installation opening which are matched with the transition sleeve and the ball sleeve respectively, the strip opening is communicated with the installation opening, the transition sleeve is slidably connected with the strip opening, and the ball sleeve is slidably connected with the installation opening.

6. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 1, characterized in that: The base head is in the shape of a truncated cone, the tail is in the shape of a cylinder, the size of the bottom circle of the cylinder is smaller than the size of the bottom of the truncated cone, the cross-sectional shape of the clamp spring sleeve at one end of the base head is hexagonal, and the shape of the circular hole at one end of the base head fits the hexagonal end of the clamp spring sleeve.

7. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 1, characterized in that: There are several adjusting screws and transition sleeves in one-to-one correspondence, and the adjusting screws and transition sleeves are evenly arranged around the central axis of the base body.

8. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 1, characterized in that: A tension rod is arranged in the circular hole at the tail of the base body, the tension rod is slidably connected to the circular hole, a toothed opening is arranged at the center of the tension rod, and a tooth pattern matching the toothed opening is arranged at the tail of the clamp spring sleeve so as to be clamped in the tension rod.

9. The round bar clamp spring sleeve tensioning device for improving the precision in automatic processing according to claim 8, characterized in that: A fixing screw hole is arranged on the tail of the base, a screw is arranged in the fixing screw hole, a thread matching the screw is arranged in the fixing screw hole, a fixing groove is arranged on the outer surface of the tension rod, and the screw passes through the screw hole and abuts against the inner wall of the fixing groove.

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