CN213054563U

CN213054563U - Open hydraulic wrench

Info

Publication number: CN213054563U
Application number: CN202020956433.5U
Authority: CN
Inventors: 李侃; 刘昇; 李骏; 王保国; 黄伟; 陈俊远; 郭登飞; 曹克丰; 刘训茂; 童章顺
Original assignee: Jiangsu Jinling Zhizao Research Institute Co ltd; Nanjing Chenguang Group Co Ltd
Current assignee: Jiangsu Jinling Zhizao Research Institute Co ltd; Nanjing Chenguang Group Co Ltd
Priority date: 2020-05-31
Filing date: 2020-05-31
Publication date: 2021-04-27
Anticipated expiration: 2030-05-31

Abstract

The utility model discloses an open hydraulic wrench, which mainly comprises a motor-open gear set mechanism, a hydraulic cylinder-ratchet pawl mechanism, a clamping mechanism, a reset mechanism, an in-place mechanism, a shell, a cover plate, a handle and a counter-force rod, wherein the motor-open gear set mechanism is driven by a hydraulic motor or a motor, and drives an open gear to continuously rotate through an open gear set, so as to complete a quick fastening process; the hydraulic cylinder-ratchet wheel and pawl mechanism is driven by the hydraulic cylinder and pushes the open ratchet wheel to intermittently rotate through the ratchet wheel and pawl mechanism so as to complete the fastening process of preset torque; the clamping mechanism can reliably clamp the target to be installed, the resetting mechanism is used for reversely positioning the hydraulic wrench, and the in-place mechanism controls the maximum stroke of the hydraulic cylinder. The utility model discloses with the threaded connection process fall into and detain and tightly detain two parts to realize through motor-opening gear train mechanism and pneumatic cylinder-ratchet pawl mechanism respectively, under the prerequisite of guaranteeing required tightening torque, can accomplish fast and screw up.

Description

Open hydraulic wrench

Technical Field

The utility model relates to a hydraulic wrench, concretely relates to opening hydraulic wrench suitable for threaded connection.

Background

The threaded connection is widely applied to industries such as modern industry, building and the like because of reliability, convenience and detachability. However, various threaded workpieces have different shapes and lengths, and the use environment conditions are complicated. The existing hydraulic wrench is in a closed form, is suitable for regular edge shapes, and is low in tightening speed, so that the use scene of the hydraulic wrench is greatly limited. The screwing of the threads can be divided into two processes, namely a screwing-up process requiring small torque but long rotation stroke and a screwing-up process requiring large torque but short rotation stroke. In order to solve the above problems, it is necessary to develop a portable open hydraulic wrench which is small in size and light in weight and can complete screw tightening as quickly as possible while satisfying the tightening torque.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an use extensive opening hydraulic wrench of scene.

Realize the utility model discloses the technical scheme of purpose does: an open hydraulic wrench comprises a motor-open gear set mechanism, a hydraulic cylinder-ratchet-pawl mechanism, a clamping mechanism, a reset mechanism and an in-place mechanism;

the motor-shedding gear set mechanism comprises a motor and a shedding gear set, wherein the shedding gear set consists of a driving wheel, two idle wheels and a shedding gear and is used for finishing the buckling process;

the hydraulic cylinder-ratchet wheel and pawl mechanism is driven by the hydraulic cylinder and pushes the open ratchet wheel to intermittently rotate through the ratchet wheel and pawl mechanism so as to complete the fastening process of preset torque;

the motor-opening gear set mechanism and the hydraulic cylinder-ratchet pawl mechanism are integrated in the shell and the cover plate;

the clamping mechanism is used for clamping a target;

the reset mechanism is used for aligning the opening gear and the opening ratchet wheel with the opening position of the shell when the wrench is reversely reset;

the in-place mechanism is used for controlling the maximum extending stroke of the hydraulic cylinder.

Furthermore, the hydraulic cylinder-ratchet wheel-pawl mechanism comprises a hydraulic cylinder, a pawl, a supporting block and an open ratchet wheel, the pawl is connected with the front end of a piston rod of the hydraulic cylinder through a pin shaft, and the supporting block is fixed on the inner side of the shell and used for supporting and guiding the pawl and transmitting radial counter force borne by the pawl to the shell.

Furthermore, the clamping mechanism is positioned between the opening gear and the opening ratchet wheel and is connected with the opening gear and the opening ratchet wheel through a step pin to form an actuating mechanism; the actuating mechanism is driven by the opening gear set or the pawl to drive the clamped workpiece to realize rotary tightening.

Furthermore, the upper side of the open ratchet wheel and the lower side of the open gear are respectively provided with a step surface, and the axial and radial positioning of the actuating mechanism is realized through the matching of the upper step surface and the lower step surface of the open right-angle annular oilless bearing.

Furthermore, the actuating mechanism is arranged at an opening at the front end corresponding to the hydraulic wrench, and the hydraulic cylinder and the motor are arranged at the rear part of the hydraulic wrench.

Furthermore, the in-place mechanism is a position detection sensor, and the maximum extending stroke of the hydraulic cylinder is controlled by detecting the position of the pawl pin shaft.

Furthermore, the reset mechanism consists of a wedge-shaped block, a spring and a limit screw, wherein the upper end of the wedge-shaped block is provided with a spring mounting hole, the side surface of the wedge-shaped block is provided with a limit screw groove, and the bottom surface of the wedge-shaped block is in a slope shape and is arranged in a sliding groove at the central line position of the opening of the shell; the spring is arranged between the shell and the wedge block mounting hole and provides pretightening force for the wedge block; and the limit screw limits the stroke of the wedge-shaped block sliding up and down through the screw groove.

Furthermore, the middle part of the upper surface of the open ratchet wheel is provided with a chute corresponding to the wedge-shaped block.

Furthermore, the driving wheel is connected with a motor shaft through a key shaft, and the motor is a hydraulic motor or a speed reducing motor.

Furthermore, a left handle and a right handle are respectively arranged at the left rear part and the right rear part of the shell, and the right handle is provided with a control button; the reaction rod is arranged on the right side of the shell, the mounting hole of the reaction rod and the shell are of an integrated structure, and a fixing knob is arranged on the mounting hole.

Compared with the prior art, the utility model discloses a show the advantage and do: (1) the whole structure adopts an opening form, so that the workpiece can be conveniently clamped and withdrawn, and the application range is wide; (2) the hydraulic motor-open gear set mechanism is used for completing the screwing process of the threads, and the hydraulic cylinder-ratchet wheel and pawl mechanism is used for completing the fastening process of the threads, so that the screwing process can be quickly completed, and the torque requirement of the fastening process can be met; (3) the integrated reset mechanism and the in-place mechanism can automatically complete the processes of screwing, fastening and resetting of the threads according to the system pressure, thereby realizing the automatic screwing of the threads; (4) all actuating mechanisms, particularly oil passages and shells of a hydraulic system are integrated in the aluminum alloy shell and the cover plate, so that the aluminum alloy shell has the advantages of compact integral structure, light weight and good reliability.

Drawings

Fig. 1 is a schematic external view of an embodiment of the open hydraulic wrench of the present invention.

Fig. 2 is a top view of the internal structure of the open hydraulic wrench according to the embodiment of the present invention after the housing is hidden.

Fig. 3 is a left side view of the internal structure of the open hydraulic wrench according to the embodiment of the present invention after the housing is hidden.

Fig. 4 is a schematic view of a reset mechanism of an embodiment of the hydraulic wrench.

Fig. 5 is a schematic diagram of a preparation state of an embodiment of the open hydraulic wrench according to the present invention.

Fig. 6 is a schematic view of a screwing process used in an embodiment of the open hydraulic wrench of the present invention.

Fig. 7 is a schematic view of a fastening process used in an embodiment of the open hydraulic wrench of the present invention.

Description of reference numerals: 1. the hydraulic wrench comprises an open hydraulic wrench, a shell, a left handle, a right handle, a counter-force rod, a control button, a fixing knob, a ratchet wheel, a gear, a clamping mechanism, a right-angle opening oilless bearing, a crescent-shaped plate, a reset mechanism, a spring, a wedge block, a limiting screw, a hydraulic cylinder, a pawl, a pin, a supporting block, a positioning mechanism, a motor, a key shaft, a driving wheel, an idler wheel, a cover plate, a target workpiece, a workpiece to be installed, a target workpiece and a workpiece, wherein the target workpiece is 24, the workpiece to be installed is 25, the workpiece to be installed is 26, and the target workpiece is adjacently fixed.

Detailed Description

As shown in fig. 1 and 2, an open hydraulic wrench 1 includes a motor-open gear fastening mechanism, a hydraulic cylinder-ratchet-pawl fastening mechanism, a clamping mechanism 10, a reset mechanism 13, an in-place mechanism 18, a crescent plate 12, a housing 2, a cover plate 23, left and

right handles

3, 4, a reaction rod 5, a supporting block 17, and other structural components. Each main mechanism is integrated in casing 2, combines apron 23 to fix a position the installation for hydraulic wrench integrates, and the lightweight.

The motor-shedding gear screwing mechanism comprises a motor 19 and a shedding gear set consisting of a driving wheel 21, two idle wheels 22 and a shedding gear 9. The motor 19 is a hydraulic motor or a reduction motor. In the open gear set, a driving wheel 21 is connected with a motor shaft through a key shaft 20, and two idle wheels 22 calculate the installation position according to the installation conditions of the open gear set.

The hydraulic cylinder-ratchet wheel-pawl fastening mechanism comprises a hydraulic cylinder 14, a pawl 15, a supporting block 17 and an open ratchet wheel 8. The pawl 15 is connected with the front end of the piston rod of the hydraulic cylinder through a pin shaft 16. The supporting block 17 is fixed on the inner side of the shell, supports and guides the pawl 17, and transmits radial counter force borne by the pawl 15 to the shell.

The clamping mechanism 10 is positioned between the split gear 9 and the split ratchet 8 and is connected with the split gear and the split ratchet through pins to form an actuating mechanism. The actuating mechanism can be driven by an opening gear set or a pawl 15 to drive the clamped workpiece to realize rotary tightening.

The upper side of the open ratchet wheel 8 and the lower side of the open gear 9 are respectively provided with a step surface, and the axial and radial positioning of the actuating mechanism is realized through the matching of an open right-angle annular oilless bearing 11 and the upper and lower step surfaces.

The crescent plate 12 is arc-shaped and is fixed on the inner circular surface corresponding to the opening of the opening gear 9 and the opening ratchet wheel 8 through screws, and plays a role in supporting a workpiece to be screwed. Through changing the crescent plates 12 with different thicknesses and matching with the clamping mechanism 10, the opening hydraulic wrench can realize centering clamping of workpieces with different diameters.

The reset mechanism includes a wedge block 1302, a spring 1301, and a limit screw 1303. The upper end of the wedge block 1302 is provided with a spring mounting hole, the side surface of the wedge block is provided with a limit screw groove, the bottom surface of the wedge block is in a slope shape, and the wedge block is mounted in a sliding groove at the central line position of the opening of the shell. The spring 1301 is installed between the shell and the wedge block installation hole to provide pretightening force for the wedge block 1302. The limit screw 1303 limits the stroke of the wedge block 1302 in up-and-down sliding through a screw groove. When the hydraulic wrench 1 rotates reversely to the right position, the wedge block 1302 slides to the corresponding inclined groove on the surface of the open ratchet 8 under the action of the spring pressure, so that the open ratchet 8 stops rotating reversely. As the wrench is rotated forward through the ramp of the ratchet surface, the wedge 1302 can slide down the ramp against the spring pressure and pass smoothly through the ramp.

The in-place mechanism 18 fixes the proximity switch below the supporting block 17, and when the hydraulic cylinder 14 extends out, the pawl pin shaft is driven to move forward, and after the maximum stroke is reached, the lower part of the pin shaft triggers the proximity switch, and the hydraulic cylinder 14 starts to retract.

The front part of the shell is provided with an opening cavity of the actuating mechanism, and the rear part of the shell is provided with a shell cavity and an oil way pore passage of the motor and the hydraulic cylinder, so that integration and light weight of the hydraulic wrench are realized. And will pass in and out the hydraulic fluid port and arrange on the casing panel, make things convenient for the oil circuit to connect and dismantle. In addition, the right side of the shell is also provided with an integrated reaction force rod mounting hole. Preferably, the housing 2 and the cover plate 23 are made of aluminum alloy, so that the weight of the hydraulic wrench can be reduced on the basis of ensuring the strength.

The left handle 3 is fixed on the left rear side of the shell 2 by four symmetrically arranged screws, and the left handle 3 can be in a vertical state or a horizontal state so as to adapt to the installation of vertical and horizontal workpieces. The right handle 4 is fixed on the right rear side of the shell 2, and is provided with a control button 6, so that an operator can hold and control the handle conveniently.

The reaction rod 5 is arranged in an installation hole on the shell 2 and is fixed through a fixing knob 7, so that the disassembly and the assembly can be convenient. The reaction rod 5 transmits a reaction force generated by tightening to an adjacent fixed workpiece by abutting on the adjacent fixed workpiece in the open hydraulic wrench, thereby reducing the burden on the operator.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments shown below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Examples

An embodiment of the utility model provides an opening hydraulic wrench, its structure refers to figure 1 to 3 shown, the utility model discloses the example provides an opening hydraulic wrench 1 has about two handles, and wherein left hand grip 3 can be changed between vertical and horizontal two kinds of states, and the left end portion of right hand grip 4 is provided with control button 6. Preferably, the left handle and the right handle are hollow cylinders, so that the hydraulic wrench is convenient to hold and the whole weight of the hydraulic wrench is reduced. The reaction rod 5 is fixed in a mounting hole integral with the housing 2 by a fixing knob 7. Preferably, the reaction rod 5 is arranged on the right side of the housing 2 in the present embodiment, so that the hydraulic wrench 1 can directly counteract the counter-clockwise tightening reaction moment by means of the adjacent fixed workpiece 26 on the front side of the reaction rod during use. The open hydraulic wrench 1 of the present invention completes the fastening process of the workpiece through the motor-open gear mechanism. Wherein the motor 19 provides the tightening power and the motor 19 transfers the power to the drive gear 21 through the key shaft 20. The shedding gear 9 is then rotated by means of the two idle gears 22. The idler gear 22 is installed at a position where the horizontal distance between the two wheels is larger than the opening width of the shedding gear 9 and the four-wheel drive does not interfere with each other, so that the shedding gear 9 continuously rotates. Because the torque required in the screwing process is small, the strength requirements on the four gears are low, the thicknesses of the four gears can be small, and lightening holes are formed in the four gears. The opening hydraulic wrench 1 of the utility model completes the fastening process of the workpiece through the hydraulic cylinder-ratchet pawl mechanism. Wherein, the hydraulic cylinder 14 is installed at the left side of the housing 2 to provide a thrust. The pawl 15 is connected to the piston rod of the hydraulic cylinder 14 by a pin 16 and pushes the open ratchet 8 to rotate clockwise. When the pin moves forward to trigger the proximity switch, the hydraulic cylinder 14 drives the pawl 15 to retract, and the pawl is driven to intermittently push the ratchet wheel to rotate through the repeated movement of the hydraulic cylinder 14. When the hydraulic wrench is reset, the motor rotates reversely to drive the actuating mechanism to rotate reversely through the opening gear set mechanism, and the resetting mechanism 13 is used for positioning.

The specific structure of the reset mechanism is shown in fig. 4, wherein a wedge block 1302 is installed in a guide groove near the opening of the shell; the spring 1301 is installed between the shell and the guide hole of the wedge block 1302; the limit screw 1303 is fixed on the shell, and the tail part of the limit screw is screwed into the limit groove of the wedge block. The limiting screw limits the sliding limit position of the wedge-shaped block. The spring 1301 provides a pre-compression force to the wedge, and its length is such that the spring is still in a compressed state at the lowest position of the wedge and the wedge is not in a compressed state at the highest position.

Fig. 5 to fig. 7 are schematic diagrams illustrating the practical use of the open hydraulic wrench for tightening a vertical workpiece according to an embodiment of the present invention. Fig. 5 is a schematic diagram of a preparation for an embodiment of the open-end hydraulic wrench according to the present invention. The left handle 3 of the hydraulic wrench is adjusted to be in a vertical state, an operator holds the left handle and the right handle of the open-ended wrench by hands, and the open-ended wrench is reset by long pressing a switch on the right handle 4. The open-end wrench is then slipped into the target workpiece 24, so that the clamping mechanism of the open-end wrench reliably clamps the workpiece 25 and the reaction rod on the right bears against the adjacent stationary workpiece 26. After the preparation is completed, the operator clicks the control button 6 on the right handle to start the tightening process. Fig. 6 is a schematic view of a make-up process used in an embodiment of the open hydraulic wrench according to the present invention. The motor 19 drives the driving gear 21 to rotate forward through the key shaft 20, and drives the shedding gear 9 to rotate continuously through the two idle gears 22. When the motor 19 stalls, the make-up process is complete and the hydraulic wrench actuator switches to the make-up process as shown in fig. 7. During fastening, the hydraulic cylinder 14 drives the pawl 15 to extend forwards and push the open ratchet 8 to rotate forwards. When the extension stroke of the hydraulic cylinder 14 reaches the maximum, the proximity switch is triggered, and the hydraulic cylinder 14 drives the pawl 15 to start the retraction stroke. Repeating the tightening process until the tightening torque reaches a preset value, and finishing the tightening process. After the tightening is completed, the hydraulic wrench is reset to align the opening gear 9 and the opening ratchet 8 with the opening positions of the housing 2 and the cover plate 23, and then the operator takes out the opening hydraulic wrench 1 to complete the tightening and installation of the target workpiece 24.

Claims

1. An open hydraulic wrench for realizing threaded connection is characterized by comprising a motor-open gear set mechanism, a hydraulic cylinder-ratchet-pawl mechanism, a clamping mechanism (10), a reset mechanism (13) and a position-in mechanism (18);

the motor-shedding gear set mechanism comprises a motor (19) and a shedding gear set, wherein the shedding gear set consists of a driving wheel (21), two idle wheels (22) and a shedding gear (9) and is used for finishing the buckling process; the hydraulic cylinder-ratchet wheel and pawl mechanism is driven by a hydraulic cylinder (14), and an opening ratchet wheel (8) is pushed to intermittently rotate through the ratchet wheel and pawl mechanism to complete a fastening process of preset torque; the motor-opening gear set mechanism and the hydraulic cylinder-ratchet pawl mechanism are integrated in the shell (2) and the cover plate (23); the clamping mechanism (10) is used for clamping a target; the reset mechanism (13) is used for aligning the opening gear (9) and the opening ratchet wheel (8) with the opening position of the shell (2) when the wrench is reversely reset; the position-locating mechanism (18) is used for controlling the maximum extending stroke of the hydraulic cylinder (14).

2. The open hydraulic wrench for realizing threaded connection according to claim 1, wherein the hydraulic cylinder-ratchet-pawl mechanism comprises a hydraulic cylinder (14), a pawl (15), a support block (17) and an open ratchet (8), the pawl (15) is connected with the front end of a piston rod of the hydraulic cylinder through a pin shaft (16), and the support block (17) is fixed on the inner side of the housing (2) to support and guide the pawl (15) and transmit radial reaction force borne by the pawl (15) to the housing.

3. Open hydraulic wrench for realising a threaded connection according to claim 2, characterised in that the clamping mechanism (10) is located between the open gear (9) and the open ratchet (8) and constitutes the actuator with both through a stepped pin connection; the actuating mechanism is driven by an opening gear set or a pawl (15) to drive the clamped workpiece to realize rotary tightening.

4. An open ended hydraulic wrench for effecting threaded connection as claimed in claim 3, characterised in that the upper side of the open ratchet wheel (8) and the lower side of the open gear (9) each have a step surface, whereby axial and radial positioning of the actuator is effected by the cooperation of the upper and lower step surfaces by means of the open right angle annular oilless bearing (11).

5. Open hydraulic wrench for making a threaded connection according to claim 4, characterised in that the actuator is mounted at the corresponding front opening of the hydraulic wrench, and that the hydraulic cylinder (14) and the motor (19) are mounted at the rear of the hydraulic wrench.

6. Open hydraulic wrench for realising a threaded connection according to claim 2, characterised in that the in-place mechanism (18) is a position detection sensor, controlling the maximum extension stroke of the hydraulic cylinder (14) by detecting the position of the pawl pin.

7. The open hydraulic wrench for realizing threaded connection according to claim 1, wherein the reset mechanism (13) is composed of a wedge block (1302), a spring (1301) and a limit screw (1303), the upper end of the wedge block (1302) is provided with a spring mounting hole, the side surface is provided with a limit screw groove, the bottom surface is in a slope shape, and the wedge block is mounted in the slide groove at the center line of the opening of the shell; the spring (1301) is installed between the shell and the wedge block installation hole and provides pretightening force for the wedge block (1302); and the limit screw (1303) limits the stroke of the wedge block sliding up and down through a screw groove.

8. Open hydraulic wrench for realising threaded connections according to claim 7, characterised in that the open ratchet (8) is provided with a chute in the middle of its upper surface corresponding to the position of the wedge.

9. Open hydraulic wrench for realising a screw connection according to claim 1, characterised in that the driving wheel (21) is connected to the motor shaft by means of a key shaft (20), the motor (19) being a hydraulic motor or a reduction motor.

10. Open hydraulic wrench for realising a threaded connection according to claim 1, characterised in that the left rear part and the right rear part of the housing (2) are provided with a left handle (3) and a right handle (4), respectively, the right handle being arranged with a control button (6); the reaction rod (5) is arranged on the right side of the shell (2), the mounting hole of the reaction rod and the shell (2) are of an integrated structure, and a fixing knob (7) is arranged on the mounting hole.