CN220334642U

CN220334642U - Front clamping jack

Info

Publication number: CN220334642U
Application number: CN202322096957.8U
Authority: CN
Inventors: 李勇军; 肖棋文; 莫荣林; 陆仁付; 李田; 沈利坤; 韦永山; 梁燕翔
Original assignee: Liuzhou Weike Prestressing Technology Co ltd
Current assignee: Liuzhou Weike Prestressing Technology Co ltd
Priority date: 2023-08-04
Filing date: 2023-08-04
Publication date: 2024-01-12
Anticipated expiration: 2033-08-04

Abstract

The utility model discloses a front clamping type jack, which relates to the technical field of jacks and comprises a plugging assembly, an oil cylinder, a piston, a punching sleeve, a tool anchor cup and a supporting assembly which are coaxially arranged; a first annular gap is formed between the plugging assembly and the piston; the core penetrating sleeve is integrally provided with a connector, a guide part is arranged between the core penetrating sleeve and the piston, and the core penetrating sleeve can move relative to the piston along the axial direction under the guide of the guide part; the tool anchor cup is internally and movably provided with a tool clamping piece, the large-diameter end of the tool clamping piece is abutted with an elastic pre-tightening assembly, and the elastic pre-tightening assembly can be pressed to elastically deform; a second annular gap is arranged between the piston and the oil cylinder; the supporting component is internally fixedly provided with a top loosening part, and the top loosening part can be abutted with the small-diameter end of the tool clamping piece and enable the tool clamping piece to be loosened in the tool anchor cup; the oil cylinder is provided with a first oil port and a second oil port which are respectively communicated with the first annular gap and the second annular gap; the front clamping type jack provided by the utility model is convenient to assemble and disassemble.

Description

Front clamping jack

Technical Field

The utility model relates to the technical field of jacks, in particular to a front clamping type jack.

Background

In the tensioning test process of the prestressed bridge, a front clamping type jack is generally adopted as a tensioning jack scheme to reduce waste of steel strands, and a tool anchor and a tool clamping piece in the front clamping type jack are arranged inside the jack to reduce the interval from a working anchor to the tool anchor, so that the effect of reducing the reserved quantity of the steel strands is realized; the front clamping type tensioning jack with the limiting device provided by the patent CN2666876Y is characterized in that the front end of the penetrating sleeve is provided with a connecting sleeve, the connecting sleeve is connected with the anchor cup, the connecting sleeve and the penetrating sleeve are arranged in a split mode, and the dismounting process is complex.

Disclosure of Invention

The utility model aims to provide a front clamping type jack which solves the problems in the prior art and is convenient to assemble and disassemble.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides a front clamping type jack, which comprises an oil cylinder, a piston and a core penetrating sleeve which are coaxially arranged, wherein the core penetrating sleeve is arranged in the oil cylinder, and the piston is arranged between the inner wall surface of the oil cylinder and the outer wall surface of the core penetrating sleeve in a sliding manner; a sealing sleeve is fixed between one end of the punching sleeve and the oil cylinder, a coaxially arranged sealing assembly is arranged between the inner peripheral surface and the outer peripheral surface of one end of the piston, which are close to the sealing assembly, respectively and hermetically contact with the punching sleeve and the oil cylinder, and a first annular gap is formed between the sealing assembly and the piston; the other end of the punching sleeve is integrally provided with a connector, a guide part is arranged between the outer peripheral surface of the punching sleeve and the inner wall surface of the piston, and the punching sleeve can move relative to the piston along the axial direction under the guide of the guide part; the tool anchor cup is movably arranged in the tool anchor cup, the large-diameter end of the tool clip is abutted to an elastic pre-tightening assembly coaxially arranged in the core-through sleeve, and the elastic pre-tightening assembly can be pressed to elastically deform; the outer peripheral surface of one end of the piston, which is away from the plugging assembly, can be in sealing contact with the inner wall surface of the oil cylinder, and a second annular gap is arranged between the outer peripheral surface of the piston and the inner peripheral surface of the oil cylinder; the piston is fixedly connected with a coaxially arranged supporting component at one end, which is away from the plugging component, of the piston, the supporting component is sleeved outside the tool anchor cup and is used for enabling a steel strand to pass through, a top loosening component is fixedly arranged in the supporting component, and the top loosening component can be abutted with the small-diameter end of the tool clamping piece and enables the tool clamping piece to be loosened in the tool anchor cup; the oil cylinder is provided with a first oil port and a second oil port which are respectively communicated with the first annular gap and the second annular gap.

Preferably, the plugging assembly comprises a pressing plate and a plug which are sequentially arranged along the direction close to the piston, a first annular gap is formed between the plug and the end face of the piston, and the end face, deviating from the plug, of the pressing plate is flush with the end face of the punching sleeve and the end face of the oil cylinder.

Preferably, the guide part is provided with a guide key, the guide key is fixedly arranged on the outer peripheral surface of the connector, the inner wall surface of the piston is provided with a guide groove extending along the axial direction, and one end of the guide key is slidably connected in the guide groove.

Preferably, the guide key is fixedly connected to the outer peripheral surface of the connector through a screw.

Preferably, the support assembly comprises a support sleeve and a support sleeve nut which are sequentially arranged along the direction deviating from the piston, one end of the support sleeve is in threaded sleeve with the outer peripheral surface of the piston, and the other end of the support sleeve is in threaded sleeve with the inner peripheral surface of the support sleeve nut.

Preferably, one end of the connector is sleeved outside the tool anchor cup, and the connector can be fixedly connected with the tool anchor cup through a fastening screw.

Preferably, the first oil port and the second oil port are respectively and fixedly connected with a first oil pipe and a second oil pipe.

Preferably, the elastic pre-tightening assembly comprises a return spring and a guide sleeve, one end face of the guide sleeve is abutted to the large-diameter end of the tool clamping piece, and the return spring is arranged between the other end of the guide sleeve and the punching sleeve.

Compared with the prior art, the utility model has the following technical effects:

the front clamping type jack comprises an oil cylinder, a piston and a core penetrating sleeve which are coaxially arranged, wherein the core penetrating sleeve is arranged in the oil cylinder, and the piston is arranged between the inner wall surface of the oil cylinder and the outer wall surface of the core penetrating sleeve in a sliding manner; a sealing sleeve is fixed between one end of the punching sleeve and the oil cylinder, a coaxially arranged sealing assembly is arranged between the one end of the piston close to the sealing assembly, and the inner peripheral surface and the outer peripheral surface of the piston close to one end of the sealing assembly are respectively in sealing contact with the punching sleeve and the oil cylinder, so that the tightness is ensured, and leakage is avoided; the other end of the core penetrating sleeve is integrally provided with the connector, the integral strength of the core penetrating sleeve can be improved, and the connecting sleeve does not need to be additionally arranged, so that the dismounting is convenient; a guide part is arranged between the outer peripheral surface of the punching sleeve and the inner wall surface of the piston, and the punching sleeve can move relative to the piston along the axial direction under the guide of the guide part so as to avoid the punching sleeve rotating relative to the piston; one end of the connector, which is away from the plugging assembly, is fixedly connected with a coaxially arranged tool anchor cup, a tool clamping piece is movably arranged in the tool anchor cup, and the tool clamping piece can be abutted against the tool anchor cup to clamp the steel strand; the large-diameter end of the tool clamping piece is abutted with an elastic pre-tightening assembly coaxially arranged in the punching sleeve, the elastic pre-tightening assembly can be pressed to elastically deform, the elastic pre-tightening assembly can be pressed and applied to the pre-tightening force of the tool clamping piece, which is in a trend of propping against the tool anchor cup, so that the tool clamping piece and the steel strand are prevented from loosening, the tool clamping piece can be fully contacted with the steel strand, and the tool clamping piece is fully propped against the tool anchor cup under the driving of the steel strand to lock the steel strand; the outer peripheral surface of one end of the piston, which is away from the plugging assembly, can be in sealing contact with the inner wall surface of the oil cylinder, so that the tightness is ensured; one end of the piston, which is away from the plugging assembly, is fixedly connected with a coaxially arranged supporting assembly, the supporting assembly can be fixedly connected with an external working anchor cup, and the supporting assembly is sleeved outside the tool anchor cup and is used for enabling a steel strand to pass through; the supporting component is internally fixedly provided with a top loosening part, and when the penetrating sleeve drives the tool anchor cup and the tool clamping piece to return, the top loosening part can be abutted with the small-diameter end of the tool clamping piece and enable the tool clamping piece to be loosened in the tool anchor cup so as to complete anchor removal; the piston is provided with a first annular gap, a second annular gap is arranged between the outer peripheral surface of the piston and the inner peripheral surface of the oil cylinder, a first oil port and a second oil port which are respectively communicated with the first annular gap and the second annular gap are arranged on the oil cylinder, oil is injected into the first annular gap through the first oil port, the oil cylinder, the punching sleeve, the tool anchor cup and the tool clamping piece can be driven to move relative to the piston and far away from the supporting component, pretension is realized, oil is injected into the second annular gap through the second oil port, and the oil cylinder, the punching sleeve, the tool anchor cup and the tool clamping piece can be driven to move relative to the piston and approach to the supporting component, so that return stroke is realized.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a front-clamping jack according to a first embodiment;

fig. 2 is a schematic view of a ready state of a front clamping jack according to the first embodiment;

fig. 3 is a schematic diagram showing a pretensioned state of the front-clamping jack according to the first embodiment.

Icon: 1-front clamping jack; 10-an oil cylinder; 11-a first oil port; 12-a second oil port; 13-a first oil pipe; 14-a second oil pipe; 20-a piston; 30-a core penetrating sleeve; 31-a connector; 40-plugging assembly; 41-pressing plates; 42-plugs; 50-a first annular gap; 60-guiding part; 61-a guide key; 70-tool anchor cup; 80-a tool clip; a 90-spring pretension assembly; 91-a return spring; 92-a guide sleeve; 100-a second annular gap; 110-a support assembly; 111-supporting sleeves; 112-sleeve nut; 120-top loose parts; 130-working anchor cup.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Example 1

The present embodiment provides a front-clamping jack, please refer to fig. 1 and 2, which includes an oil cylinder 10, a piston 20 and a penetration sleeve 30 coaxially arranged, wherein the penetration sleeve 30 is arranged in the oil cylinder 10, and the piston 20 is slidably arranged between the inner wall surface of the oil cylinder 10 and the outer wall surface of the penetration sleeve 30; a sealing sleeve is fixed between one end of the punching sleeve 30 and the oil cylinder 10, a coaxially arranged sealing assembly 40 is arranged on the sealing sleeve, and the inner peripheral surface and the outer peripheral surface of one end of the piston 20 close to the sealing assembly 40 are respectively in sealing contact with the punching sleeve 30 and the oil cylinder 10, so that the tightness is ensured, and leakage is avoided; the other end of the core through sleeve 30 is integrally provided with the connector 31, the integral strength of the core through sleeve 30 can be improved, and the connecting sleeve is not required to be additionally arranged, so that the assembly and the disassembly are convenient; a guide part 60 is arranged between the outer peripheral surface of the punching sleeve 30 and the inner wall surface of the piston 20, and the punching sleeve 30 can move relative to the piston 20 along the axial direction under the guide of the guide part 60 so as to avoid the punching sleeve 30 rotating relative to the piston 20; the end of the connector 31, which is away from the plugging assembly 40, is fixedly connected with a coaxially arranged tool anchor cup 70, a tool clamping piece 80 is movably arranged in the tool anchor cup 70, and the tool clamping piece 80 can be abutted against the tool anchor cup 70 to clamp the steel strand; the large-diameter end of the tool clamping piece 80 is abutted with the elastic pre-tightening assembly 90 coaxially arranged in the punching sleeve 30, the elastic pre-tightening assembly 90 can be pressed to elastically deform, the elastic pre-tightening assembly 90 can be pressed and applied to the pre-tightening force of the tool clamping piece 80, which tends to tightly press against the tool anchor cup 70, so that the tool clamping piece 80 and the steel strand are prevented from loosening, the tool clamping piece 80 can be fully contacted with the steel strand, and the steel strand is fully pressed against the tool anchor cup 70 under the driving of the steel strand to lock the steel strand; the outer peripheral surface of one end of the piston 20, which is away from the plugging assembly 40, can be in sealing contact with the inner wall surface of the oil cylinder 10, so that the tightness is ensured; the end of the piston 20, which is away from the plugging assembly 40, is fixedly connected with a coaxially arranged supporting assembly 110, the supporting assembly 110 can be fixedly connected with an external working anchor cup 130, and the supporting assembly 110 is sleeved outside the tool anchor cup 70 and is used for enabling a steel strand to pass through; the supporting component 110 is internally fixedly provided with a top loosening part 120, and when the penetrating sleeve 30 drives the tool anchor cup 70 and the tool clamping piece 80 to return, the top loosening part 120 can be abutted with the small-diameter end of the tool clamping piece 80 and enable the tool clamping piece 80 to be loosened from the tool anchor cup 70, so that anchor removal is completed; the plugging assembly 40 and the piston 20 are provided with a first annular gap 50, a second annular gap 100 is arranged between the outer peripheral surface of the piston 20 and the inner peripheral surface of the oil cylinder 10, a first oil port 11 and a second oil port 12 which are respectively communicated with the first annular gap 50 and the second annular gap 100 are arranged on the oil cylinder 10, and please refer to fig. 3, oil is injected into the first annular gap 50 through the first oil port 11, so that the oil cylinder 10, the punching sleeve 30, the tool anchor cup 70 and the tool clamping piece 80 can be driven to move relative to the piston 20 and far away from the supporting assembly 110, pretension is realized, oil is injected into the second annular gap 100 through the second oil port 12, and the oil cylinder 10, the punching sleeve 30, the tool anchor cup 70 and the tool clamping piece 80 can be driven to move relative to the piston 20 and close to the supporting assembly 110, and return stroke is realized.

In the alternative of this embodiment, more preferably, the plugging assembly 40 includes a pressing plate 41 and a plug 42 sequentially disposed along a direction close to the piston 20, where the pressing plate 41 and the plug 42 are fixedly sleeved between the bushing 10 and the cylinder 20, and a first annular gap 50 is formed between the plug 42 and an end face of the piston 20, and an end face of the pressing plate 41 facing away from the plug 42 is flush with an end face of the bushing 30 and an end face of the cylinder 10, so that space is saved.

In the alternative of the present embodiment, preferably, the guide member 60 is provided with a guide key 61, the guide key 61 is fixedly provided on the outer peripheral surface of the connecting head 31, the inner wall surface of the piston 20 is provided with a guide groove extending along the axial direction, and one end of the guide key 61 is slidably connected in the guide groove; the axial direction is realized by the cooperation of the guide key 61 and the guide groove so as to prevent rotation.

In the alternative of this embodiment, preferably, the guide key 61 is fixedly connected to the outer peripheral surface of the connector 31 by a screw, so as to facilitate assembly and disassembly.

In the alternative of this embodiment, preferably, the supporting component 110 includes a supporting sleeve 111 and a supporting sleeve nut 112 that are sequentially disposed along a direction away from the piston 20, one end of the supporting sleeve 111 is screwed on the outer peripheral surface of the piston 20, and the other end is screwed on the inner peripheral surface of the supporting sleeve nut 112, and is fixedly connected with the working anchor cup 130 through the supporting sleeve nut 112.

In the alternative of this embodiment, preferably, one end of the connector 31 is sleeved outside the tool anchor cup 70, and the connector 31 can be fixedly connected with the tool anchor cup 70 through a fastening screw; when the tool anchor cup 70 needs to be cleaned, the supporting component 110 is disassembled, the tool anchor cup 70 can be leaked, then the tool anchor cup 70 is disassembled, and the cleaning is convenient, wherein the guide key 61 is arranged on the punching sleeve 30, and the disassembly and assembly of the tool anchor cup 70 are not affected.

In the alternative scheme of the embodiment, preferably, the first oil port 11 and the second oil port 12 are respectively and fixedly connected with a first oil pipe 13 and a second oil pipe 14, so that the circulation of hydraulic oil is facilitated; wherein the second oil pipe 14 is fixedly connected with the first oil pipe 13 and can be used as a handle.

In the alternative of this embodiment, preferably, the elastic pre-tightening assembly 90 includes a return spring 91 and a guide sleeve 92, one end surface of the guide sleeve 92 abuts against the large diameter end of the tool clamping piece 80, and the return spring 91 is disposed between the other end of the guide sleeve 92 and the through sleeve 30; the return spring 91 is deformed under compression and applies a preload force to the tool jaw 80 via the guide sleeve 92.

The principle and the implementation mode of the utility model are explained by applying specific examples (one of practical application scenes) in the utility model, and the above examples are only used for helping to understand the method and the core idea of the utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the utility model.

Claims

1. A front clamping jack, characterized in that: the hydraulic oil cylinder comprises an oil cylinder (10), a piston (20) and a punching sleeve (30) which are coaxially arranged, wherein the punching sleeve (30) is arranged in the oil cylinder (10), and the piston (20) is arranged between the inner wall surface of the oil cylinder (10) and the outer wall surface of the punching sleeve (30) in a sliding manner; a sealing sleeve is fixed between one end of the punching sleeve (30) and the oil cylinder (10), a coaxially arranged sealing assembly (40) is arranged between the punching sleeve and the oil cylinder (10), the inner peripheral surface and the outer peripheral surface of the piston (20) close to one end of the sealing assembly (40) are respectively in sealing contact with the punching sleeve (30) and the oil cylinder (10), and a first annular gap (50) is formed between the sealing assembly (40) and the piston (20); a connector (31) is integrally arranged at the other end of the punching sleeve (30), a guide component (60) is arranged between the outer peripheral surface of the punching sleeve (30) and the inner wall surface of the piston (20), and the punching sleeve (30) can move relative to the piston (20) along the axial direction under the guide of the guide component (60); one end of the connector (31) deviating from the plugging component (40) is fixedly connected with a tool anchor cup (70) which is coaxially arranged, a tool clamping piece (80) is movably arranged in the tool anchor cup (70), the large-diameter end of the tool clamping piece (80) is abutted with an elastic pre-tightening component (90) which is coaxially arranged in the punching sleeve (30), and the elastic pre-tightening component (90) can be elastically deformed under compression; an outer peripheral surface of one end, deviating from the plugging assembly (40), of the piston (20) can be in sealing contact with an inner wall surface of the oil cylinder (10), and a second annular gap (100) is formed between the outer peripheral surface of the piston (20) and the inner peripheral surface of the oil cylinder (10); the end, deviating from the plugging assembly (40), of the piston (20) is fixedly connected with a coaxially arranged supporting assembly (110), the supporting assembly (110) is sleeved outside the tool anchor cup (70) and used for enabling a steel strand to pass through, a top loosening part (120) is fixedly arranged in the supporting assembly (110), and the top loosening part (120) can be abutted with the small-diameter end of the tool clamping piece (80) and enable the tool clamping piece (80) to be loosened from the tool anchor cup (70); the oil cylinder (10) is provided with a first oil port (11) and a second oil port (12) which are respectively communicated with the first annular gap (50) and the second annular gap (100).

2. The front truck jack of claim 1 wherein: the plugging assembly (40) comprises a pressing plate (41) and a plug (42) which are sequentially arranged along the direction close to the piston (20), a first annular gap (50) is formed between the plug (42) and the end face of the piston (20), and the end face, deviating from the plug (42), of the pressing plate (41) is flush with the end face of the punching sleeve (30) and the end face of the oil cylinder (10).

3. The front truck jack of claim 1 wherein: the guide part (60) is provided with a guide key (61), the guide key (61) is fixedly arranged on the outer peripheral surface of the connector (31), the inner wall surface of the piston (20) is provided with a guide groove extending along the axial direction, and one end of the guide key (61) is slidably connected in the guide groove.

4. A front truck jack according to claim 3, wherein: the guide key (61) is fixedly connected to the outer peripheral surface of the connector (31) through a screw.

5. The front truck jack of claim 1 wherein: the supporting assembly (110) comprises a supporting sleeve (111) and a supporting sleeve nut (112) which are sequentially arranged along the direction deviating from the piston (20), one end of the supporting sleeve (111) is in threaded sleeve arrangement on the outer peripheral surface of the piston (20), and the other end of the supporting sleeve (111) is in threaded sleeve arrangement on the inner peripheral surface of the supporting sleeve nut (112).

6. The front truck jack of claim 1 wherein: one end of the connector (31) is sleeved outside the tool anchor cup (70), and the connector (31) can be fixedly connected with the tool anchor cup (70) through a fastening screw.

7. The front truck jack of claim 1 wherein: the first oil port (11) and the second oil port (12) are respectively and fixedly connected with a first oil pipe (13) and a second oil pipe (14).

8. The front truck jack of claim 1 wherein: the elastic pre-tightening assembly (90) comprises a return spring (91) and a guide sleeve (92), one end face of the guide sleeve (92) is abutted to the large-diameter end of the tool clamping piece (80), and the return spring (91) is arranged between the other end of the guide sleeve (92) and the punching sleeve (30).