CN219901956U

CN219901956U - Electric wrench structure

Info

Publication number: CN219901956U
Application number: CN202322446955.7U
Authority: CN
Inventors: 杨长州; 秦克永; 刘青; 严水林; 詹胜龙; 李腾飞; 刘志高
Original assignee: Zhuhai Huaya Machinery Technology Co ltd
Current assignee: Zhuhai Huaya Machinery Technology Co ltd
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2023-10-27
Anticipated expiration: 2033-09-11

Abstract

The utility model aims to provide an electric wrench structure which is reliable in clamping, wide in compatibility range and provided with a centering mechanism. The electric drive mechanism comprises an electric drive main body and a clamping jaw mechanism which are connected, wherein the clamping jaw mechanism is connected with a power output end of the electric drive main body, the clamping jaw mechanism comprises a shell, a transmission assembly and a screwing clamping jaw assembly, the transmission assembly is arranged in the shell, the screwing clamping jaw assembly comprises a gear disc and a connecting disc, the gear disc is in rotary fit in the shell and is in transmission connection with the transmission assembly, the connecting disc is movably matched on the gear disc, a centering block matched with an opening of the gear disc and at least two clamping jaw blocks are rotatably arranged on the connecting disc, and a plurality of limiting columns matched with the centering block and the clamping jaw blocks respectively are arranged on the gear disc. The utility model is applied to the technical field of electric tools.

Description

Electric wrench structure

Technical Field

The utility model is applied to the technical field of electric tools, and particularly relates to an electric wrench structure.

Background

The reinforced steel bars are basically adopted as reinforcing connection structures of concrete in the field of construction, so that the concrete structure has a better stable system, is convenient for construction and enhances the earthquake resistance of the building. The steel bars are often manufactured in batches according to the specification of the same size and length, so that batch transportation is realized. However, during installation and use, the steel bars are required to be connected and fixed through the steel bar sleeve, so that sufficient length is ensured to be convenient for connection of the subsequent main body structure. The traditional method mostly adopts a manual wrench to screw the reinforcing steel bar sleeve to the end of the reinforcing steel bar or screw the reinforcing steel bar of the extension section to the other end of the reinforcing steel bar sleeve, high-strength continuous operation is needed, labor intensity is high, and particularly in summer, workers have a rest after completing 3 to 4 workers each time, and working efficiency is low. In addition, the manual lever mode is used for tightening, and because the spanner arm length requires a large working space, the operation in a small space is difficult, for example, the connection operation is difficult due to the upright post type reinforcement cage structure, and the spanner can be hindered by similar reinforcement bars.

At present, an electric wrench is mainly adopted to replace the traditional manual operation, the existing electric wrench structure is used for executing the operation of automatically tightening the steel bars or the sleeves, but the existing clamping jaw is used for clamping the steel bars or the sleeves by adopting a single-tooth mode, such as the Chinese patent with the publication number of CN214560438U, which discloses an electric torque wrench for connecting the steel bars with the positive and negative wire sleeves, and the driven structure of the single-side driving other side is adopted to realize the screwing function. In addition, there is also an electric wrench adopting a single-tooth structure, and if the single-tooth structure is incompatible in size during clamping, the steel bars are not located in the rotation center easily, and further continuous shaking can be generated, so that the clamping reliability is affected, and the single-side opening compatible diameter range is limited. Therefore, the electric wrench structure with the centering mechanism, which has reliable clamping and wide compatibility range, can greatly improve the stability and safety of the steel bar during tightening.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing an electric wrench structure which is reliable in clamping, large in compatible range and provided with a centering mechanism.

The technical scheme adopted by the utility model is as follows: the electric drive mechanism comprises an electric drive main body and a clamping jaw mechanism which are connected, wherein the clamping jaw mechanism is connected with a power output end of the electric drive main body, the clamping jaw mechanism comprises a shell, a transmission assembly and a screwing clamping jaw assembly, the transmission assembly is arranged in the shell, the screwing clamping jaw assembly comprises a gear disc and a connecting disc, the gear disc is in rotary fit in the shell and is in transmission connection with the transmission assembly, the connecting disc is movably matched on the gear disc, a centering block matched with an opening of the gear disc and at least two clamping jaw blocks are rotatably arranged on the connecting disc, and a plurality of limiting columns matched with the centering block and the clamping jaw blocks respectively are arranged on the gear disc.

According to the scheme, the electric drive main body provides structural support, power and energy storage, so that the electric wrench structure is convenient to operate in a working environment and is portable to use. The electric drive main body drives the screwing clamping jaw assembly to act through the transmission assembly. The clamping of the steel bars or the sleeve nuts is realized by arranging the two groups of clamping jaw blocks, so that the force applied to the workpiece during screwing is ensured to be more stable and reliable, and products compatible with more sizes can be realized by adopting the double clamping jaw design, and compared with the single clamping jaw structure, the self-adapting range is wider. Setting up simultaneously the realization of centering piece can carry out spacingly to the work piece when pressing from both sides tightly, makes the work piece keep in the centre of a circle department of toothed disc, and then guarantee that the work piece can rotate in rotation center department when the operation, and then the rocking of reduction equipment during operation improves the security simultaneously, is difficult to appear crookedly when making the work piece screw up.

One preferred scheme is, the connection pad includes shielding dish and driving disk, clamping jaw piece and centering piece are in through corresponding support column normal running fit respectively on the driving disk, shielding dish pass through the support column with driving disk fixed connection, be provided with on the driving disk with a plurality of spacing post one-to-one complex arc hole, still be provided with spacing wheel on the spacing post, the diameter of spacing wheel is greater than the width of arc hole.

When the gear plate rotates, the centering block and the clamping jaw block are driven by the limiting column to simultaneously approach the circle center of the gear plate, and the distance between the tail end of the centering block and the circle center of the gear plate is equal to the shortest distance between the clamping jaw block and the circle center of the gear plate.

In one preferred scheme, the centering block and the clamping jaw block are both in rotary fit with the connecting disc through torsion springs.

The reversing stop block is arranged on the shell, a limiting protrusion is arranged on the reversing stop block, a reversing wedge block is arranged on one supporting column, a reversing baffle column is arranged on the transmission disc, the tail end of the reversing wedge block is in limiting fit with the limiting protrusion when the transmission disc rotates reversely, and meanwhile, the reversing wedge block is stressed to be close to the reversing baffle column and is in limiting fit; when the transmission disc rotates in the forward direction, the reversing wedge block is driven by the limiting protrusion to rotate in the direction away from the reversing baffle column.

The clamping jaw is characterized in that the clamping jaw is provided with a clamping jaw block, the clamping jaw block is provided with a clamping jaw block, and the clamping jaw block is provided with a clamping jaw block.

The clamping jaw block is characterized in that the connecting disc is also provided with a maximum stroke baffle post in limit fit with the clamping jaw block.

The transmission assembly comprises a driving arc gear, a first cylindrical gear and two groups of second cylindrical gears, wherein the driving arc gear is connected with a power output end of the electric drive main body, the first cylindrical gear and the two groups of second cylindrical gears are all in running fit in the shell, the first cylindrical gear is provided with an arc gear structure in transmission fit with the driving arc gear, the two groups of second cylindrical gears are all in transmission fit with the first cylindrical gears, and the two groups of second cylindrical gears are respectively meshed with the outer edges of two sides of the gear disc.

In one preferred embodiment, the electric driving body includes a handle, a driving motor disposed in the handle, and a battery electrically connected to the driving motor.

Drawings

FIG. 1 is a schematic view of an exploded construction of the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of an exploded construction of the screw jaw assembly;

FIG. 4 is a schematic perspective view of the jaw mechanism in an operative condition;

fig. 5 is a schematic perspective view of the jaw mechanism in a reset state.

Detailed Description

As shown in fig. 1 to 5, in this embodiment, the present utility model includes an electrically driven body 1 and a clamping jaw mechanism connected to a power output end of the electrically driven body 1, the clamping jaw mechanism includes a housing 2, a transmission component 3 disposed in the housing 2, and a screwing clamping jaw component 4, the screwing clamping jaw component 4 includes a gear disc 401 and a connecting disc 402, the gear disc 401 is rotationally fitted in the housing 2 and is in transmission connection with the transmission component 3, the connecting disc 402 is movably fitted on the gear disc 401, the connecting disc 402 is rotationally provided with a centering block 403 and two clamping jaw blocks 404 which are respectively engaged with the centering block 403 and the clamping jaw blocks 404, and the gear disc 401 is provided with three limiting posts 405 which are respectively engaged with the centering block 403 and the clamping jaw blocks 404, and the limiting posts 405 drive the centering block 403 and the clamping jaw blocks 404 to rotate toward a center of the gear disc 401 through the connecting disc 402, thereby clamping and applying a screwing force to a workpiece. Still be provided with on the casing 2 with the wear ring of gear plate 401 looks adaptation, gear plate 401 normal running fit is in on the wear ring, through setting up the wear ring carries out the normal running fit of gear plate 401, and then reduce because of the loss that gear plate 401 rotates brings for equipment has longer life. The shell 2, the gear disc 401 and the connecting disc 402 are respectively provided with an opening for a workpiece to enter and exit, when the workpiece enters the opening, the workpiece continuously rotates at a specific position to be matched with threads of other workpieces by clamping and providing screwing force, and the opening is U-shaped.

As shown in fig. 3, in this embodiment, the connection disc 402 includes a shielding disc 402a and a transmission disc 402b, the clamping jaw block 404 and the centering block 403 are respectively rotationally matched on the transmission disc 402b through corresponding support columns 406, the shielding disc 402a is fixedly connected with the transmission disc 402b through the support columns 406, the transmission disc 402b is provided with arc holes 407 which are matched with a plurality of spacing columns 405 in a one-to-one correspondence manner, and the spacing columns 405 are further provided with spacing wheels 408, and the diameter of each spacing wheel 408 is larger than the width of each arc hole 407. When the limiting post 405 is matched with the end of the arc-shaped hole 407, the connecting disc 402 is driven to rotate, and meanwhile the clamping jaw block 404 and the centering block 403 are pushed to clamp a workpiece. The limiting wheel 408 pushes the clamping jaw block 404 on one hand, and limits the connecting disc 402 on the other hand, so that the connecting disc is kept in fit with the gear disc 401. When the clamping jaw block 404 rotates towards the center of the gear plate 401, the clamping jaw block 404, the limiting column 405 and the supporting column 406 jointly form a lever mechanism, so that the radial component force of the clamping jaw block 404 along the gear plate 401 can provide positive pressure required by enough friction force for screwing the threaded sleeve or the reinforcing steel bar, and the clamping workpiece can be reliably clamped during screwing, and slipping is avoided.

As shown in fig. 4, in this embodiment, when the gear plate 401 rotates, the centering block 403 and the clamping jaw block 404 are driven by the limiting post 405 to simultaneously approach the center of the gear plate 401, and the distance between the end of the centering block 403 and the center of the gear plate 401 is equal to the shortest distance between the tooth surface of the clamping jaw block 404 and the center of the gear plate 401. The three-point clamping workpiece is realized through the design, so that the workpiece is kept at the center of the gear plate 401, the centrifugal force generated by the rotation of the workpiece during operation of the equipment is reduced, the shaking of the equipment is greatly reduced, the stability of the operation of the equipment is improved, the influence of the operation of the equipment on operators is reduced, and the safety is ensured.

In this embodiment, the centering block 403 and the clamping jaw block 404 are both rotationally fitted on the connecting disc 402 by torsion springs. The torsion spring enables the centering block 403 and the clamping jaw block 404 to automatically reset when the clamping jaw block is reversely loosened, so that the effect of quick loosening is achieved.

As shown in fig. 4, in this embodiment, the casing 2 is provided with a reverse stop 201, the reverse stop 201 is provided with a limiting protrusion, one of the support columns 406 is provided with a reverse wedge 409, the driving disk 402b is provided with a reverse stop column 410, and when the driving disk 402b rotates reversely, the tail end of the reverse wedge 409 is in limiting fit with the limiting protrusion, and meanwhile, the reverse wedge 409 is forced to be close to the reverse stop column 410 and in limiting fit; when the driving plate 402b rotates forward, the reverse wedge 409 is driven by the limiting protrusion to rotate in a direction away from the reverse stop post 410. By providing the reverse stopper 201, the opening of the land 402 is aligned synchronously with the opening of the gear plate 401 when the release is performed. During forward rotation, the reverse wedge 409 is far away from the reverse baffle column 410 to realize automatic avoidance, and the reverse wedge 409 is free to rotate without limit in the direction. The reversing wedge 409 is provided with a torsion spring and automatically approaches the reversing column 410 under the force of the torsion spring.

When the transmission disc 402b stops moving under the limit action of the reverse wedge 409 during reverse rotation, the gear disc 401 is in limit fit with the arc-shaped hole 407 through the limit post 405, so that the opening of the gear disc 401 is aligned with the opening of the shell 2 during reverse rotation, at this time, the U-shaped openings of the gear disc 401 and the connecting disc 402 are consistent with the opening of the shell 2, the whole clamping jaw mechanism is completely opened, the opening is maximum, and the screwed steel bars or sleeves can enter and exit normally.

The centering block 403 and the two clamping jaw blocks 404 are provided with guide grooves at the matching positions with the limiting columns 405, one end of each guide groove is a guide wall, and the other end of each guide groove is a blocking wall. And in forward rotation, the limiting column 405 cooperates with the guide wall to push the centering block 403 and the clamping jaw block 404 to be gradually close to the center of the gear disc 401, and in reverse rotation, the limiting column 405 cooperates with the blocking wall to realize quick reset of the centering block 403 and the clamping jaw block 404.

In this embodiment, two groups of clamping jaw blocks 404 are provided on the connecting disc 402, the two groups of clamping jaw blocks 404 are sequentially provided along the circumferential direction of the connecting disc 402, tooth surfaces are provided on the two groups of clamping jaw blocks 404, and the tooth surfaces of the two groups of clamping jaw blocks 404 are kept parallel when the clamping jaw blocks 404 are forced to rotate. The two groups of clamping jaw blocks 404 are arranged in two opposite groups to uniformly limit the workpiece, so that the effect of clamping two sides of the workpiece simultaneously is achieved, and the workpiece is kept at the eccentric position of the gear disc 401.

As shown in fig. 4, in this embodiment, the connection disc 402 is further provided with a maximum travel stop 411 that is in limit fit with the clamping jaw block 404. When the connecting disc 402 rotates with the gear disc 401, the clamping jaw block 404 rotates under the driving of the limiting post 405, and the maximum travel stop post 411 is arranged to limit the clamping jaw block 404, so that the clamping jaw block 404 is prevented from excessively rotating and cannot be reset.

As shown in fig. 2, in this embodiment, the transmission assembly 3 includes a driving arcuate gear 301, a first cylindrical gear 302, and two sets of second cylindrical gears 303, where the driving arcuate gear 301 is connected to a power output end of the electric driving main body 1, the first cylindrical gear 302 and the two sets of second cylindrical gears 303 are all rotationally matched in the housing 2, an arcuate gear structure that is in transmission fit with the driving arcuate gear 301 is provided on the first cylindrical gear 302, the two sets of second cylindrical gears 303 are all in transmission fit with the first cylindrical gear 302, and the two sets of second cylindrical gears 303 are respectively meshed with outer edges on two sides of the gear disc 401. The two groups of second cylindrical gears 303 are used for driving the gear plate 401, so that a group of second cylindrical gears 303 are used for driving all the time in the rotation process of the gear plate 401, and power loss is prevented when the gear plate 401 rotates to an opening position.

As shown in fig. 1, in this embodiment, the electric driving body 1 includes a handle, a driving motor disposed in the handle, and a battery electrically connected to the driving motor, where the battery is detachably connected to the bottom of the handle, a connection contact electrically connected to the driving motor is disposed at the bottom of the handle, the connection contact is adapted to a conducting structure on the battery, and a switch structure electrically connected to the driving motor is further disposed on the handle. The shell 2 is also provided with a handle, so that the equipment can be conveniently held during operation.

The working principle of the utility model is as follows:

before the operation is performed, the workpiece is aligned to the opening of the casing 2, so that the workpiece reaches the openings of the gear plate 401 and the connecting plate 402 through the opening. As shown in fig. 4, after the driving motor is started in the forward direction, the driving motor drives the gear plate 401 to rotate through the transmission assembly. When the gear plate 401 rotates, the three groups of limiting columns 405 are matched with the corresponding arc-shaped holes 407, and the limiting columns 405 drive the centering blocks 403 and the clamping jaw blocks 404 to rotate through the limiting wheels 408 in the process of moving in the arc-shaped holes 407, so that the clamping jaw blocks 404 extend out to clamp and center the workpiece. When the limiting wheel 408 is in limiting fit with the end of the arc-shaped hole 407, the gear disc 401 drives the connecting disc 402 to rotate, and then drives the workpiece to rotate to perform screwing operation.

Conversely, when the reversing is performed, the limiting post 405 releases the limiting on the centering block 403 and the clamping jaw block 404, and the centering block 403 and the clamping jaw block 404 automatically retract under the action of the torsion spring. When the reverse wedge 409 is engaged with the reverse stopper 201 and the reverse stopper 410, the rotation of the connection plate 402 is restricted, and the state of being aligned with the opening of the housing 2 is stopped, and the restoration of the gear plate 401 and the connection plate 402 to the initial state is achieved, as shown in fig. 5, facilitating the detachment of the work.

While the embodiments of this utility model have been described in terms of practical aspects, they are not to be construed as limiting the meaning of this utility model, and modifications to the embodiments and combinations with other aspects thereof will be apparent to those skilled in the art from this description.

Claims

1. The utility model provides an electric spanner structure, it includes electric drive main part (1) and the clamping jaw mechanism that are connected, clamping jaw mechanism with the power take off end of electric drive main part (1) is connected, its characterized in that: the clamping jaw mechanism comprises a shell (2), a transmission assembly (3) arranged in the shell (2) and a screwing clamping jaw assembly (4), the screwing clamping jaw assembly (4) comprises a gear disc (401) and a connecting disc (402), the gear disc (401) is in running fit in the shell (2) and is in transmission connection with the transmission assembly (3), the connecting disc (402) is movably matched with the gear disc (401), a centering block (403) matched with an opening of the gear disc (401) and at least two clamping jaw blocks (404) are rotationally arranged on the connecting disc (402), and a plurality of limiting columns (405) matched with the centering block (403) and the clamping jaw blocks (404) are respectively arranged on the gear disc (401).

2. The electric wrench structure according to claim 1, wherein: the connecting disc (402) comprises a shielding disc (402 a) and a transmission disc (402 b), the clamping jaw blocks (404) and the centering blocks (403) are respectively in running fit with the transmission disc (402 b) through corresponding support columns (406), the shielding disc (402 a) is fixedly connected with the transmission disc (402 b) through the support columns (406), arc-shaped holes (407) which are in one-to-one fit with a plurality of limit columns (405) are formed in the transmission disc (402 b), limit wheels (408) are further arranged on the limit columns (405), and the diameter of each limit wheel (408) is larger than the width of each arc-shaped hole (407).

3. The electric wrench structure according to claim 1, wherein: when the gear plate (401) rotates, the centering block (403) and the clamping jaw block (404) are driven by the limiting column (405) to be close to the circle center of the gear plate (401) at the same time, and the distance between the tail end of the centering block (403) and the circle center of the gear plate (401) is equal to the shortest distance between the clamping jaw block (404) and the circle center of the gear plate (401).

4. The electric wrench structure according to claim 1, wherein: the centering block (403) and the clamping jaw block (404) are both in rotary fit on the connecting disc (402) through torsion springs.

5. The electric wrench structure according to claim 2, wherein: the reversing stop block (201) is arranged on the shell (2), limiting protrusions are arranged on the reversing stop block (201), reversing wedge blocks (409) are arranged on one supporting column (406), reversing stop columns (410) are arranged on the transmission disc (402 b), the tail ends of the reversing wedge blocks (409) are in limiting fit with the limiting protrusions when the transmission disc (402 b) reversely rotates, and meanwhile the reversing wedge blocks (409) are stressed to be close to the reversing stop columns (410) and are in limiting fit; when the transmission disc (402 b) rotates forwards, the reversing wedge block (409) is driven by the limiting protrusion to rotate in a direction away from the reversing baffle column (410).

6. The electric wrench structure according to claim 1, wherein: two groups of clamping jaw blocks (404) are arranged on the connecting disc (402) in total, the two groups of clamping jaw blocks (404) are sequentially arranged along the circumferential direction of the connecting disc (402), tooth surfaces are arranged on the two groups of clamping jaw blocks (404), and the tooth surfaces of the two groups of clamping jaw blocks (404) are kept parallel when the clamping jaw blocks (404) are stressed to rotate.

7. The electric wrench structure according to claim 1, wherein: and the connecting disc (402) is also provided with a maximum travel baffle column (411) in limit fit with the clamping jaw block (404).

8. The electric wrench structure according to claim 1, wherein: the transmission assembly (3) comprises a driving arc gear (301), a first cylindrical gear (302) and two groups of second cylindrical gears (303), wherein the driving arc gear (301) is connected with a power output end of the electric driving main body (1), the first cylindrical gear (302) and the two groups of second cylindrical gears (303) are in rotary fit in the shell (2), the first cylindrical gear (302) is provided with an arc gear structure in transmission fit with the driving arc gear (301), the two groups of second cylindrical gears (303) are in transmission fit with the first cylindrical gear (302), and the two groups of second cylindrical gears (303) are respectively meshed with the outer edges of two sides of the gear disc (401).

9. The electric wrench structure according to claim 1, wherein: the electric drive main body (1) comprises a handle, a driving motor arranged in the handle and a battery electrically connected with the driving motor.