Buffer structure and anti-collision column

Abstract

The utility model provides a buffer structure and an anti-collision column, and belongs to the technical field of machining clamping. The buffering structure comprises a base and a supporting pipe, the supporting pipe is elastically and telescopically connected with the base, a tensioning piece is arranged on the base and movably tensioned on the inner wall of the supporting pipe, and a clamping plate is detachably connected to the front end of the supporting pipe. According to the clamping device, before the clamping plate makes contact with the workpiece, the buffering structure does not generate resistance, when the clamping plate is completely attached to the surface of the workpiece, the branch pipe retracts into the base to relieve impact during clamping, then the expansion piece expands the branch pipe to prevent the branch pipe from stretching out and drawing back, and therefore rigid supporting is achieved, the clamping accuracy is improved, and the service life of the clamping device is prolonged. And no extra structure in the clamping area affects the placement of the workpiece.

Description

Technical Field

[0001] The present application relates to the technical field of machining clamping, and in particular to a buffer structure and an anti-collision column. Background Art

[0002] In the field of machining, the workpiece needs to be clamped, and the workpiece is easily damaged during the clamping process.

[0003] In this regard, China's patent application number CN202121442971.3 discloses a clamp anti-collision column with an energy-absorbing and buffering structure. This solution mainly clamps the workpiece by rotating the spiral rod for axial movement, and uses the spring on the spiral rod to reduce the impact during the clamping process.

[0004] However, in the process of implementing the technical solutions in the embodiments of the present application, the inventors of the present application found that the above technology has at least the following technical problems:

[0005] 1. The spiral rod and the clamping plate are rigidly connected in the axial direction and cannot provide a buffering effect. The axial buffering can only rely on the rubber pad and the abutment spring. However, the elasticity of the rubber pad itself is not conducive to the accurate positioning of the workpiece, and the abutment spring will also occupy the clamping area, affecting the clamping of large-volume workpieces;

[0006] 2. Since the first spring and the second spring increase the rotational resistance of the spiral rod, the spiral rod will be laborious when being driven, and will be subject to resistance even when the clamping block does not contact the workpiece. Utility Model Content

[0007] In order to make up for the above deficiencies, the present application provides a buffer structure and an anti-collision column, aiming to improve the problems mentioned in the above background technology.

[0008] In a first aspect, an embodiment of the present application provides a buffer structure, comprising a base and a branch pipe, wherein the branch pipe is elastically and telescopically connected to the base, a tensioning member is provided on the base, the tensioning member is movably tightened on the inner wall of the branch pipe, and a splint is detachably connected to the front end of the branch pipe.

[0009] In a specific embodiment, the base includes a bottom tube and a sleeve, the rear end of the branch tube is provided with a flange, the sleeve limits the flange within the bottom tube, the sleeve is flange-connected to the bottom tube, and the outer circle of the branch tube is slidably connected to the inner wall of the sleeve.

[0010] In the above implementation process, the flanged end of the branch pipe is inserted into the bottom pipe, and then the sleeve is connected to the bottom pipe to restrict the branch pipe. The sleeve is also used to increase the movement stability of the branch pipe and improve the overall strength.

[0011] In a specific embodiment, the base further includes a spring, and the spring movably presses against the bottom tube and the branch tube.

[0012] In the above implementation process, when the branch pipe moves, the spring is compressed, which plays the role of elastic telescopic connection and buffering. In this embodiment, when the spring is compressed to the bottom, a step is provided on the bottom tube to replace the spring to support the branch pipe, thereby realizing a rigid axial connection and achieving a larger and more stable clamping force.

[0013] In a specific embodiment, a mounting plate is provided on the bottom tube.

[0014] In the above implementation process, the buffer structures are arranged in pairs and are respectively installed on the external opposing clamping mechanisms using mounting plates.

[0015] In a specific embodiment, the tensioning member includes an expansion tube, the expansion tube is fixed on the bottom tube, the head end of the expansion tube is inserted into the branch tube, and a cone rod is movably connected inside the expansion tube.

[0016] In the above implementation process, when the conical rod is retracted into the expansion tube, the expansion tube head is expanded by the conical surface and tightened in the branch tube, thereby forming an axial fixing effect.

[0017] In a specific embodiment, the tensioner further includes a cylinder, and an output end of the cylinder is fixedly connected to the conical rod.

[0018] In the above implementation process, the cylinder is used as the power. After the workpiece is clamped in place, the cylinder pulls the tapered rod to lock the branch pipe to achieve rigid clamping. In this embodiment, after the bottom tube is installed on the external opposing clamping mechanism, the extension of the cylinder passes through the opposing clamping mechanism and is connected to the tapered rod. The cylinder body can be directly installed and fixed to the opposing clamping mechanism, for example, installed on the clamping column in the comparison case.

[0019] In a specific implementation manner, a piston is connected to the inner end of the conical rod and slides in the branch pipe, and an air hole is opened at the front end of the branch pipe.

[0020] In the above implementation process, when the branch pipe is extended and retracted, the air in the branch pipe flows slowly through the air holes to play a damping role. It should be noted that the axial stroke of the cone rod is very short and the suction effect on the air can be ignored.

[0021] In a second aspect, the present application further provides an anti-collision column, comprising the above-mentioned buffer structure.

[0022] Compared with the prior art, the beneficial effects of the present application are: before the clamp contacts the workpiece, the buffer structure does not generate resistance; when the clamp is completely in contact with the workpiece surface, the branch tube retracts into the base to alleviate the impact during clamping; then the tensioner tightens the branch tube to prevent the branch tube from expanding and contracting, thereby achieving rigid support and improving the accuracy of clamping; and there is no additional structure in the clamping area that affects the placement of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic diagram of an external perspective of a buffer structure provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a cross-sectional view of a buffer structure provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the explosion structure of the buffer structure provided in an embodiment of the present application.

[0027] In the figure: 10-base; 11-bottom tube; 12-sleeve; 13-spring; 14-mounting plate; 20-branch pipe; 30-tensioner; 31-expansion tube; 32-cone rod; 33-cylinder; 34-piston; 35-air hole; 40-clamp. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0029] See also Figure 1-Figure 3 The present application provides a buffer structure, including a base 10 and a branch pipe 20, wherein the branch pipe 20 is elastically and telescopically connected to the base 10, a tensioning member 30 is arranged on the base 10, and the tensioning member 30 is movably tensioned on the inner wall of the branch pipe 20, and a clamping plate 40 is detachably connected to the front end of the branch pipe 20. Before the clamping plate 40 contacts the workpiece, the buffer structure does not generate resistance, and when the clamping plate 40 is completely attached to the surface of the workpiece, the branch pipe 20 is retracted into the base 10 to relieve the impact during clamping, and then the tensioning member 30 tightens the branch pipe 20 to prevent the branch pipe 20 from expanding and contracting, thereby achieving rigid support and improving the accuracy of clamping, and there is no additional structure in the clamping area that affects the placement of the workpiece.

[0030] See also Figure 1-Figure 3The base 10 includes a bottom tube 11 and a sleeve 12. The rear end of the branch tube 20 is provided with a flange. The sleeve 12 limits the flange in the bottom tube 11. The sleeve 12 is flange-connected to the bottom tube 11. The outer circle of the branch tube 20 is slidably connected to the inner wall of the sleeve 12. The flanged end of the branch tube 20 is inserted into the bottom tube 11, and then the sleeve 12 is connected to the bottom tube 11 to limit the branch tube 20. The sleeve 12 is also used to increase the movement stability of the branch tube 20 and improve the overall strength.

[0031] See also Figure 1-Figure 3 The base 10 further includes a spring 13, which is movably pressed against the bottom tube 11 and the branch tube 20. When the branch tube 20 moves, the spring 13 is compressed, which plays the role of elastic telescopic connection and buffering. In this embodiment, when the spring 13 is compressed to the bottom, a step is provided on the bottom tube 11 to replace the spring 13 to support the branch tube 20, so as to achieve a rigid axial connection and realize a larger and more stable clamping force.

[0032] See also Figure 1-Figure 3 , a mounting plate 14 is arranged on the bottom pipe 11. The buffer structure is arranged in pairs, and is respectively mounted on an external opposing clamping mechanism using the mounting plates 14.

[0033] See also Figure 1-Figure 3 The tensioning member 30 includes an expansion tube 31, which is fixed on the bottom tube 11, and the head end of the expansion tube 31 is inserted into the branch tube 20. A tapered rod 32 is movably connected inside the expansion tube 31. When the tapered rod 32 is retracted into the expansion tube 31, the head of the expansion tube 31 is expanded by the tapered surface, and is tightened in the branch tube 20, thereby forming an axial fixing effect.

[0034] See also Figure 1-Figure 3 The tensioner 30 further includes a cylinder 33, and the output end of the cylinder 33 is fixedly connected to the tapered rod 32. The cylinder 33 is used as a power. After the workpiece is clamped in place, the cylinder 33 pulls the tapered rod 32 to lock the branch pipe 20 to achieve rigid clamping. In this embodiment, after the bottom pipe 11 is installed on the external opposing clamping mechanism, the cylinder 33 is extended and connected to the tapered rod 32 through the opposing clamping mechanism. The cylinder 33 body can be directly installed and fixed to the opposing clamping mechanism, for example, installed on the clamping column in the comparative case.

[0035] See also Figure 1-Figure 3 The inner end of the conical rod 32 is connected to a piston 34 that slides in the branch pipe 20, and an air hole 35 is provided at the front end of the branch pipe 20. When the branch pipe 20 is extended or retracted, the air in the branch pipe 20 flows slowly through the air hole 35, which plays a damping role. It should be noted that the axial stroke of the conical rod 32 is very short, and the suction effect on the air can be ignored.

[0036] See also Figure 1-Figure 3 The present application further provides an anti-collision column, including the above-mentioned buffer structure.

[0037] The working principle of the buffer structure is as follows: "The buffer structures are arranged in pairs, and are respectively installed on the external opposing clamping mechanisms by using the mounting plates 14. The workpiece is placed between the two buffer structures. When the opposing clamping mechanisms push the buffer structures to hit the workpiece, the clamping plates 40 contact the surface of the workpiece and the branch pipe 20 will retract into the bottom pipe 11, using the spring 13 as a buffer. Then the opposing clamping mechanism stops moving, and the cylinder 33 pulls the cone rod 32. When the cone rod 32 retracts into the expansion tube 31, the cone surface is used to expand the head of the expansion tube 31 and tighten it in the branch pipe 20. The branch pipe 20 is fixed relative to the bottom pipe 11, and the steel is realized. The clamping mechanism has a rigid clamping effect. If the clamping force required is large, the opposite clamping mechanism will fully clamp to the bottom until the branch tube 20 fully compresses the spring 13 and rests on the step of the bottom tube 11, thereby achieving rigid support and having a larger and more stable clamping force. In summary, before the clamping plate 40 contacts the workpiece, the buffer structure does not generate resistance. When the clamping plate 40 is fully attached to the surface of the workpiece, the branch tube 20 retracts into the base 10 to alleviate the impact during clamping. Subsequently, the tensioning member 30 tightens the branch tube 20 to prevent the branch tube 20 from expanding and contracting, thereby achieving rigid support and improving the accuracy of clamping. There is no additional structure in the clamping area that affects the placement of the workpiece.

[0038] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A buffer structure, characterized in that: The invention comprises a base (10) and a branch pipe (20), wherein the branch pipe (20) is elastically and telescopically connected to the base (10), a tensioning member (30) is arranged on the base (10), and the tensioning member (30) is movably tensioned on the inner wall of the branch pipe (20), and a clamping plate (40) is detachably connected to the front end of the branch pipe (20).

2. A buffer structure according to claim 1, characterized in that: The base (10) comprises a bottom tube (11) and a sleeve (12); a flange is arranged at the rear end of the branch tube (20); the sleeve (12) restricts the flange within the bottom tube (11); the sleeve (12) is flange-connected to the bottom tube (11); and the outer circle of the branch tube (20) is slidably connected to the inner wall of the sleeve (12).

3. A buffer structure according to claim 2, characterized in that: The base (10) also includes a spring (13), and the spring (13) is movably pressed against the bottom tube (11) and the branch tube (20).

4. A buffer structure according to claim 3, characterized in that: The bottom tube (11) is provided with a mounting plate (14).

5. A buffer structure according to claim 4, characterized in that: The tensioning member (30) comprises an expansion tube (31), the expansion tube (31) is fixed on the bottom tube (11), the head end of the expansion tube (31) is inserted into the branch tube (20), and a cone rod (32) is movably connected inside the expansion tube (31).

6. A buffer structure according to claim 5, characterized in that: The tensioning member (30) further comprises a cylinder (33), and the output end of the cylinder (33) is fixedly connected to the conical rod (32).

7. A buffer structure according to claim 6, characterized in that: The inner end of the conical rod (32) is connected to a piston (34) which slides in the branch pipe (20), and the front end of the branch pipe (20) is provided with an air hole (35).

8. A crash column, characterized in that: The buffer structure comprises the buffer structure described in any one of claims 1 to 7.

Images