Flexible clamping and positioning device

Abstract

The invention discloses a flexible clamping and positioning device which comprises a fixed flexible clamping jaw seat, a movable flexible clamping jaw, a clamping and positioning actuator and a pin shaft connecting piece. The fixed flexible clamping jaw base and the movable flexible clamping jaw are each of a pressure-adjustable flexible clamping jaw body structure. The flexible clamping jaw body structure comprises a clamping jaw body, a pressurizing flexible bag body, a movable clamping block, a connecting guide screw rod, a spring damping unit and a damping adjusting nut. The clamping force can be continuously adjusted by adjusting the pressure of the pressurizing flexible bag body; when the drill rod and the anchor rod rotate in the clamping process, the flexible capsule body can automatically adjust pressure due to the action of torque and deformation force, and therefore follow-up self-adaptive flexible clamping force is applied. The device not only can ensure the positioning accuracy and smooth rotation of the drill rod and the anchor rod in the rod connecting and replacing process, but also can effectively reduce the abrasion of the clamping jaw, and improves the reliability and the service life of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible clamping positioning devices, in particular to a flexible clamping positioning device. BACKGROUND

[0002] At present, rigid clamping positioning devices or rigid clamping jaw structures are commonly used when connecting and replacing rods in rock drilling jumbos and anchor jumbos. Since the rigid clamping method relies on the pushing force of the oil cylinder to provide clamping force, the clamping force is not adjustable and is usually large. During the process of connecting and replacing rods, the drill rod and anchor rod need to be rotated for threaded connection or separation in the clamped state. If the clamping force is too large, it is not conducive to rotation operation. Therefore, the existing technology usually reduces the clamping force by manually loosening the oil cylinder. However, the manual loosening range is difficult to accurately control, and it is easy to cause the drill rod and anchor rod to deviate in the clamping positioning device, thereby reducing the success rate of rod connection and replacement.

[0003] In addition, under the condition of rigid clamping, the friction force and contact stress of the clamping surface are large when the drill rod and anchor rod rotate, which causes the clamping surface to wear severely, thereby shortening the service life of the entire clamping positioning device and reducing its reliability. The existing rigid clamping positioning device cannot automatically adjust the clamping force according to the torque and deformation force generated when the drill rod and anchor rod rotate, and therefore has deficiencies in wear resistance, self-adaptability and service life. SUMMARY

[0004] The purpose of the present application is to provide a flexible clamping positioning device to overcome the problems of unadjustable clamping force, positioning deviation caused by manual loosening, severe wear of the clamping surface, and reduced reliability and service life in the prior art.

[0005] The present application is implemented by adopting the following technical scheme: a flexible clamping positioning device, characterized in that it comprises a fixed flexible jaw seat, a movable flexible jaw, a clamping positioning actuator, and a pin shaft for connection; the fixed flexible jaw seat and the movable flexible jaw both adopt an adjustable pressure flexible jaw body structure, and the clamping positioning actuator drives the movable flexible jaw to move relative to the fixed flexible jaw seat, thereby realizing the clamping and release of the drill rod and anchor rod.

[0006] Further, the adjustable pressure flexible jaw body structure comprises a jaw body, a pressure-filled flexible capsule, a movable clamping block, a connecting guide screw, a spring damping unit and a damping adjusting nut.

[0007] Further, the pressure-filled flexible capsule is arranged in the bottom chute of the jaw body and is in communication with the external pressure adjusting pipeline through the pressure filling and pressure releasing interface, for adjusting the size of the clamping force.

[0008] Further, the connecting guide screw sequentially passes through the clamping jaw body, the pressure-filled flexible capsule body and the movable clamping block, and is provided with the spring damping unit at the end, and the damping adjusting nut is used for adjusting the pre-tightening force of the spring damping unit.

[0009] Further, the spring damping unit is used for providing buffering and energy absorption when the drill rod and the anchor rod rotate, and the dynamic response characteristics of the clamping jaw body structure are changed by adjusting the tightness of the damping adjusting nut.

[0010] Further, the clamping and positioning actuator is a hydraulic cylinder or a pneumatic cylinder, which is independent of the pressure regulating pipeline of the pressure-filled flexible capsule body, and can realize the overall clamping action and the flexible clamping force adjustment respectively.

[0011] Further, the pressure-filled flexible capsule body is compressed due to the torque and deformation force, and the internal pressure is automatically increased, so that the flexible clamping force is applied to the drill rod and the anchor rod in a follow-up adaptive manner, so as to ensure the positioning accuracy and reduce the wear.

[0012] The flexible clamping and positioning device has the following beneficial effects: By adopting the adjustable pressure flexible clamping jaw body structure in the fixed flexible clamping jaw seat and the movable flexible clamping jaw, the clamping force can be adjusted according to the working conditions, and the problem of positioning deviation caused by excessive clamping force of the oil cylinder is avoided.

[0013] The pressure-filled flexible capsule body is arranged in the flexible clamping jaw body structure, the clamping force can be automatically changed according to the torque and deformation force when the drill rod and the anchor rod rotate, the follow-up adaptive clamping is realized, and the positioning accuracy in the butt joint process is ensured.

[0014] The spring damping unit and the damping adjusting nut are arranged, the switching between the fast response clamping and the flexible buffering can be realized, the overload impact can be effectively absorbed, and the service life of the clamp is prolonged.

[0015] The clamping and positioning actuator and the flexible capsule pressure regulating pipeline are independent of each other, so that the fast and stable clamping action can be realized, and the fine and adjustable flexible clamping force can be provided BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, and the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the structures shown in the drawings.

[0017] Fig. 1 It is a schematic diagram of the overall structure of the present application; Fig. 2 It is a schematic diagram of the clamping jaw body structure; In the figure: 1-fixed flexible clamping jaw seat, 2-movable flexible clamping jaw, 3-clamping positioning actuator, 4-pin A, 5-pin B, 6-pin C, 11-clamping jaw body, 12-pressurized flexible bladder, 13-movable clamping block, 14-connecting guide screw, 15-spring damping unit, 16-damping adjustment nut. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention. Example 1

[0020] like Figs. 1-2 As shown, this embodiment provides a flexible clamping and positioning device, including a fixed flexible clamping jaw seat 1, a movable flexible clamping jaw 2, a clamping and positioning actuator 3, a pin A4, a pin B5 and a pin C6.

[0021] Specifically, the fixed flexible jaw base 1 is secured to the device frame via a pin, while the movable flexible jaw 2 is connected to the clamping and positioning actuator 3 via a pin A4. Driven by the actuator, the movable flexible jaw 2 can move radially to achieve clamping or loosening. The clamping and positioning actuator 3 is preferably a hydraulic or pneumatic cylinder, with its output end hinged to the movable flexible jaw 2, ensuring a smooth motion trajectory during clamping and loosening.

[0022] When the actuator 3 drives the movable flexible clamping jaw 2 to move toward the fixed flexible clamping jaw seat 1, the drill rod or anchor rod is clamped and positioned; when the actuator 3 is reset in the opposite direction, the movable flexible clamping jaw 2 moves away from the fixed flexible clamping jaw seat 1 under the action of the reset force, thereby releasing the drill rod or anchor rod and realizing the rod changing operation.

[0023] Compared with the traditional rigid clamping positioning device, the embodiment can ensure the rotation freedom of the drill rod and anchor rod in the clamping and positioning state. During the rod connecting and rod replacing process, the drill rod and anchor rod can rotate in the clamping and positioning device to complete the threaded connection or disconnection operation, and the position deviation caused by excessive rigid clamping is avoided. At the same time, since the clamping force can be adjusted by the flexible jaw body structure used subsequently, the situation that the traditional oil cylinder clamping force is too large and must be manually loosened is avoided, thereby improving the success rate of rod connecting and rod replacing. Embodiment 2

[0024] The embodiment is further optimized on the basis of embodiment one, and specifically: Both the fixed flexible jaw seat 1 and the movable flexible jaw 2 adopt an adjustable pressure flexible jaw body structure.

[0025] The adjustable pressure flexible jaw body structure includes a jaw body 11, a pressure-filled flexible capsule 12, a movable clamping block 13, a connecting guide screw 14, a spring damping unit 15 and a damping adjusting nut 16.

[0026] The pressure-filled flexible capsule 12 is located in the bottom groove of the jaw body 11 and is connected with the external pressure adjusting pipeline through the pressure filling and pressure releasing interface. The movable clamping block 13 is slidingly installed in the sliding groove of the jaw body 11 and can produce corresponding displacement when the capsule 12 expands or compresses. The connecting guide screw 14 passes through the jaw body 11, the capsule 12 and the movable clamping block 13 in sequence, and the spring damping unit 15 is arranged at the end of the connecting guide screw 14. The damping adjusting nut 16 is used to adjust the pre-tightening force of the spring and the overall balance state of the system.

[0027] When the device is in a non-working state, the capsule 12 maintains a normal pressure state, and the jaw structure is in an initial balance position. When the device enters a working state, the capsule 12 is pressurized through the pressure filling interface, so that the movable clamping block 13 is pushed outward, thereby generating a flexible clamping force on the drill rod and anchor rod under the action of the jaw body 11. By adjusting the internal pressure of the capsule 12, the adjustable size of the clamping force can be realized to meet the clamping requirements under different working conditions.

[0028] Further, during the rotation butt joint process of the drill rod and anchor rod, when the rotation torque and deformation force increase, the capsule 12 is compressed under the action of external force, the internal pressure rises, and the clamping force automatically increases, thereby realizing the self-adaptive flexible clamping of the rotating drill rod and anchor rod. This "force adjustment" feature not only ensures the positioning accuracy of the drill rod and anchor rod during the rotation process, but also reduces the wear of the rod surface caused by the traditional rigid jaw.

[0029] In addition, the spring damping unit 15 cooperates with the damping adjusting nut 16, and can further adjust the dynamic response of the clamping jaw. By changing the pre-tightening force of the spring, the clamping jaw can be switched between fast response clamping and flexible energy absorption. For example, in the scenario where the positioning of the connecting rod needs to be completed quickly, the adjusting nut 16 is adjusted to increase the pre-tightening force of the spring, so as to obtain stronger instantaneous clamping force; in the scenario where the service life of the clamping jaw needs to be prolonged or damage caused by overload needs to be prevented, the pre-tightening force of the spring can be reduced, so that the clamping jaw has better buffering capacity.

[0030] Through the above improvement, the flexible clamping jaw body structure in the embodiment not only realizes continuous adjustment of the clamping force, but also has the comprehensive advantages of follow-up adaptation, buffering protection and service life extension, greatly improving the success rate of the connecting rod and the reliability of the device.

[0031] In the above embodiments, the basic principles and main features of the present application and the advantages of the present application are described. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. A flexible clamping and positioning device, characterized in that: The invention comprises a fixed flexible clamping jaw seat (1), a movable flexible clamping jaw (2), a clamping positioning actuator (3), and a pin shaft for connection; the fixed flexible clamping jaw seat (1) and the movable flexible clamping jaw (2) both adopt a pressure-adjustable flexible clamping jaw body structure, and the clamping positioning actuator (3) drives the movable flexible clamping jaw (2) to move relative to the fixed flexible clamping jaw seat (1), thereby achieving the clamping and release of the drill rod and the anchor rod.

2. A flexible clamping and positioning device according to claim 1, characterized in that: The pressure-adjustable flexible clamping jaw structure comprises a clamping jaw body (11), a pressurized flexible capsule (12), a movable clamping block (13), a connecting guide screw (14), a spring damping unit (15), and a damping adjustment nut (16).

3. A flexible clamping and positioning device according to claim 2, characterized in that: The pressurized flexible sac (12) is arranged in the bottom chute of the clamping jaw body (11) and is connected to an external pressure regulating pipeline via a pressure charging and pressure relief interface for adjusting the magnitude of the clamping force.

4. A flexible clamping and positioning device according to claim 3, characterized in that: The connecting guide screw (14) passes through the clamping jaw body (11), the pressurized flexible sac (12) and the movable clamping block (13) in sequence, and is provided with the spring damping unit (15) at the end thereof. The damping adjustment nut (16) is used to adjust the preload force of the spring damping unit (15).

5. The flexible clamping and positioning device according to claim 2, characterized in that: The spring damping unit (15) is used to provide a buffering energy absorption effect when the drill rod and the anchor rod rotate, and the dynamic response characteristics of the clamping jaw structure are changed by adjusting the tightness of the damping adjustment nut (16).

6. A flexible clamping and positioning device according to claim 2, characterized in that: The clamping positioning actuator (3) is a hydraulic cylinder or a pneumatic cylinder, which is independent of the pressure regulating pipeline of the pressurized flexible bladder (12), and can respectively realize the overall clamping action and the flexible clamping force adjustment.

7. The flexible clamping and positioning device according to claim 2, characterized in that: The pressurized flexible sac (12) is compressed due to the action of torque and deformation force, and the internal pressure automatically increases, thereby applying a dynamic and adaptive flexible clamping force to the drill rod and the anchor rod to ensure positioning accuracy and reduce wear.

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