CN109159068B

CN109159068B - Bolt tightening unit for gun bolt tightening device

Info

Publication number: CN109159068B
Application number: CN201811273268.7A
Authority: CN
Inventors: 马海涛; 董育伟; 张昭; 张嵘; 丁芝彦; 王旅鹏; 姜海明; 张皓翔
Original assignee: Huaiyin Institute of Technology
Current assignee: Huaiyin Institute of Technology
Priority date: 2018-10-30
Filing date: 2018-10-30
Publication date: 2020-05-22
Anticipated expiration: 2038-10-30
Also published as: CN109159068A

Abstract

The invention discloses a bolt tightening device unit for a gun type bolt tightening device, which sequentially comprises a bolt tightening device head, a bolt tightening device main rod, a rod body clamping part and a hook pull ring groove from front to back, wherein the rod body clamping part is clamped with the inner wall of a bolt tightening device clamping sleeve to be in interference fit, the inner wall of the bolt tightening device clamping sleeve is a conical cambered surface, and the hook pull ring groove is matched with a drag hook. As can be seen from the above structure, the bolt tightener unit for a gun type bolt tightener of the present invention realizes a quick replacement of the bolt tightener, improving the operation efficiency.

Description

Bolt tightening unit for gun bolt tightening device

Technical Field

The present invention relates to the technical field of bolt tighteners, and more particularly, to a bolt tightener unit for a gun type bolt tightener.

Background

Bolt (commonly known as screw): mechanical parts, cylindrical threaded fasteners fitted with nuts. A fastener consisting of a head part and a screw (a cylinder with external threads) needs to be matched with a nut and is used for fastening and connecting two parts with through holes. This form of connection is known as a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so that the bolt connection belongs to detachable connection.

Bolts have various head profiles: a cylindrical head, a semi-countersunk head, a spherical cylindrical head, a pan head, a semi-circular head and a hexagonal head. Corresponding to different head shapes of the bolts, different bolt tightening tools including a straight screwdriver (commonly called a screwdriver), a cross screwdriver, a ring spanner, an open end wrench, a socket wrench, an inner hexagon wrench, a star wrench and the like are required to be used, and the bolt tightening tools have different sizes.

In the process of actually dismounting a certain product or equipment, different bolts are required to be equipped with corresponding bolt tightening tools, so that the operator is inconvenient to carry, and the bolt tightening tools need to be replaced at any time in the using process, so that the working efficiency is low.

Disclosure of Invention

The invention aims to: the defects of the prior art are overcome, and the quick-replacement gun type bolt tightening device is provided, wherein a set of bolt tightening device units are placed in a bolt tightening device rotating wheel, and the mode of replacing the bolt tightening device units is changed into a mode of directly operating through pushing and pulling a push-pull cover, so that the quick replacement of the bolt tightening device units is realized, and the operating efficiency is improved.

The technical scheme adopted by the invention is as follows:

a quick-replaceable gun-type bolt tightener comprises a spindle shell, wherein a motor is fixed in the spindle shell, a motor output shaft of the motor extends forwards and is in transmission connection with a bolt tightener clamping sleeve at the front end of the spindle shell through a transmission shaft, the bolt tightener clamping sleeve is rotatably connected to a vertical plate, the vertical plate is fixedly connected with the front end of the spindle shell through a connecting plate, a bolt tightener rotating wheel is arranged between the spindle shell and the vertical plate, an axial center through hole A arranged on the bolt tightener rotating wheel is coaxially sleeved on the transmission shaft and is in rotation connection with the transmission shaft, a plurality of bolt tightener storage through holes are uniformly distributed on the end surface of the bolt tightener rotating wheel by taking the axial center as the center of a circle, a bolt tightener unit is respectively placed in each bolt tightener storage through hole, and the axial center of the bolt tightener clamping sleeve is positioned on a cylindrical surface surrounded by the axial centers of, a bolt runner push-pull device is arranged in the main shaft housing at the rear side of the bolt runner, is coaxially arranged with the bolt runner collar, and pushes the bolt runner unit into the bolt runner collar from a bolt runner storage through hole corresponding to the position of the bolt runner collar or pulls the bolt runner unit back into the bolt runner storage through hole corresponding to the position of the bolt runner collar from the bolt runner collar; the bottom rear side of main shaft shell is fixed with the hand (hold), the hand (hold) internal fixation has the battery, the bottom of main shaft shell, be located hand (hold) the place ahead and be equipped with the button that is used for controlling motor pivoted.

According to a further improvement scheme of the invention, a sun wheel A is fixed on an output shaft of the motor, a plurality of planet wheels A are in meshing transmission around the sun wheel A, the planet wheels A are respectively fixed at one end of a rotating shaft A, a planet wheel B is fixed at the other end of the rotating shaft A, the planet wheels B are in meshing transmission connection with the sun wheel B, the rotating shaft B of the sun wheel B is coaxial with the output shaft of the motor, and one end of the rotating shaft B, far away from the motor, is in coaxial transmission connection with a transmission shaft. Through the two-stage transmission of the two groups of planetary wheel sets, the stability of transmission is ensured.

According to a further improved scheme of the invention, the rotating shafts A are respectively in rotating connection with the planet carrier, and the planet carrier is fixedly connected with the inner wall of the main shaft shell.

According to a further improvement of the invention, the rotating shaft A and the rotating shaft B are respectively in rotational connection with the planet carrier through bearings.

In a further improvement of the present invention, the diameter of the sun gear a is smaller than that of the planet gear a, the diameter of the planet gear a is larger than that of the planet gear B, and the diameter of the planet gear B is smaller than that of the sun gear B. The effect of reducing the speed and increasing the torque is achieved by setting the diameters of the gears of the two planetary gear sets.

According to a further improvement of the invention, the transmission shaft is in coaxial transmission connection with the rotating shaft B through a coupler. Through the arrangement of the coupler, the rotating shaft B is convenient to disassemble and assemble.

According to a further improved scheme of the invention, the bolt tightening device push-pull device comprises a sleeve sleeved on the transmission shaft and a push-pull pipe which is positioned on the upper side of the transmission shaft and reciprocates along the axial direction of the transmission shaft, the sleeve is rotatably connected with the transmission shaft, and the front end and the rear end of the sleeve are axially limited with the transmission shaft through a vertical plate and a main shaft shell respectively; the push-pull pipe is movably connected with the sleeve, and the transmission shaft is rotatably connected with an axis through hole B arranged on the sleeve. The pushing out and the returning back of the bolt tightening unit in the bolt tightening device rotating wheel are realized through the functions of the sleeve and the push-pull pipe.

According to a further improved scheme of the invention, a plurality of axially arranged strip-shaped grooves are uniformly distributed on the surface of the sleeve, two adjacent strip-shaped grooves are communicated through a connecting groove respectively, the connecting groove is positioned at the rear end of the strip-shaped groove, and the connecting grooves are inclined along the same direction; a sliding block is fixed at the bottom of the push-pull pipe and positioned at the rear end of the push-pull pipe, the sliding block moves along the strip-shaped groove and the connecting groove, and the outer diameter of the push-pull pipe is matched with the inner diameter of the storage through hole of the bolt tightening device; the number of the strip-shaped grooves is equal to that of the bolt tightening device storage through holes of the bolt tightening device rotating wheel. The sleeve is rotated in the pulling process of the push-pull pipe through the strip-shaped groove and the connecting groove arranged on the surface of the sleeve.

According to a further improved scheme of the invention, the strip-shaped groove comprises a shallow groove and a deep groove, the shallow groove is positioned at the rear side of the deep groove, a forward extending surface of a rear side groove wall of the connecting groove is superposed with a step vertical surface formed at a connecting position of the shallow groove and the deep groove of the corresponding strip-shaped groove, the groove bottom of the connecting groove is inclined upwards from front to back along the direction of the connecting groove, the groove bottom depth of the front end of the connecting groove is greater than or equal to that of the deep groove, and the groove bottom depth of the rear end of the connecting groove is less than or equal to. Through the arrangement of the deep groove, the shallow groove and the bottom of the transition groove, the push-pull pipe drives the sleeve to automatically rotate in the pulling-back process.

According to a further improved scheme of the invention, a front end pipe orifice of the push-pull pipe is open, a notch A is formed in the upper side of the rear end of the side wall of the push-pull pipe, an operation vertical plate is upwards arranged on the lower portion of the side wall of the rear end of the push-pull pipe, a push-pull rod penetrates through the push-pull pipe, the outer wall of the push-pull rod is matched with the inner wall of the push-pull pipe, the rear end of the push-pull rod is located in the notch A, the front end of the push-pull rod forwards extends out of the front end pipe orifice of the push-pull pipe, a limiting baffle plate matched with the outer diameter of the push-pull pipe is arranged at the front end of the push-pull rod, a convex block A is upwards fixed on the upper portion of the. The push-pull rod arranged in the push-pull pipe is used for pushing out and pulling back the bolt tightening unit in the bolt tightening device rotating wheel.

According to a further improvement scheme of the invention, the draw hook is fixed at the front end of the long axial rod, a convex block B is arranged at the rear end of the long axial rod and on the side where the draw hook is located, the push-pull rod is provided with an axial slotted hole corresponding to the long axial rod, the front end of the axial slotted hole extends to the front end of the push-pull rod and extends towards the side wall of the push-pull rod on the side corresponding to the draw hook to form a notch B, the rear end of the axial slotted hole extends to the position within the range of the notch A and extends towards the side wall of the push-pull rod on the side corresponding to the convex block B to form a strip-shaped through hole A, and the convex block. Through the action of the draw hook and the convex block B, the draw hook can move along the radial direction of the push-pull rod, and the bolt tightening device unit is connected and separated.

The invention has the further improvement scheme that the end surface of one side of the axial long rod, which is back to the strip-shaped through hole A, is provided with a convex fulcrum, and the convex fulcrum is contacted with the groove wall of one side of the axial groove hole, which is back to the strip-shaped through hole A, so that the axial long rod forms a lever structure; in a free state, one end of the axial long rod corresponding to the bump B is tilted, the bump B extends out of the strip-shaped through hole A, and the distance between the drag hook and the axis of the push-pull rod is smaller than or equal to the radius of the limiting baffle. Through the effect of protruding fulcrum, make the axial stock of connecting drag hook and lug B form lever structure, be convenient for through the relative position control drag hook's of lug B relative position.

According to a further improved scheme of the invention, a strip-shaped through hole B communicated with the inside and the outside of the push-pull pipe is formed in the surface of the side wall of the push-pull pipe, a protruding column is arranged at the top of the outer side wall of the push-pull rod and between the bump A and the limiting baffle, the diameter of the protruding column is matched with the width of the strip-shaped through hole B and moves along the strip-shaped through hole B, and the strip-shaped through hole B inclines to one side of the push-pull pipe along the direction from front to back; when the protruding column moves to the foremost end of the strip-shaped through hole B, the protruding block A is positioned above the push-pull rod, and when the protruding column moves to the rearmost end of the strip-shaped through hole B, the strip-shaped through hole A is positioned above the push-pull rod, and the protruding block A is positioned on the side of the push-pull rod; the protruding column is in the moving range along the strip-shaped through hole B, the protruding block B in the strip-shaped through hole A is always positioned in the notch A and extends outwards out of the strip-shaped through hole A, and the distance between the drag hook and the axis of the push-pull rod is smaller than or equal to the radius of the limiting baffle. Through the effect of bar through-hole B and protruding post for push-and-pull rod and push-and-pull pipe can also rotate relatively in relative axial displacement process simultaneously.

According to a further improvement scheme of the invention, when the push-pull pipe and the push-pull rod move backwards along the strip-shaped groove to the maximum stroke position, the protruding column is positioned at the foremost end of the strip-shaped through hole B, the protruding block B is positioned at one side of the push-pull rod, the position, corresponding to the protruding block B, of the inner wall of the main shaft shell is provided with a protruding block C, the protruding block B in the strip-shaped through hole A is blocked by the protruding block C and is positioned in the push-pull rod, and the distance between the draw hook and the axis of the push-pull rod is larger than the radius of the limiting baffle. And under the action of the convex block C, the convex block B in the strip-shaped through hole B is controlled to move inwards along the radial direction of the push-pull rod, so that the draw hook is driven to move outwards along the radial direction of the push-pull rod.

According to a further improvement scheme of the invention, when the projection A is positioned on the side of the push-pull rod, the rear end face of the projection A is attached to the inner wall of the main shaft shell and the front end face of a push-pull rod limiting block arranged on the side corresponding to the projection A. Under the action of the push-pull rod limiting block, the bolt tightening device unit which is pushed out of the bolt tightening device storage through hole and connected with the bolt tightening device clamping sleeve has an axial supporting force when the bolt is screwed, and the bolt tightening device unit is prevented from returning due to the axial force in the process of screwing the bolt.

According to a further improved scheme of the invention, the push-pull rod limiting block is positioned in the limiting block groove, a spring A is arranged between the push-pull rod limiting block and the groove bottom of the limiting block groove, and the push-pull rod limiting block moves in a reciprocating manner along the limiting block groove along a direction vertical to the inner wall of the main shaft shell; when the spring A is in a natural state, the push-pull rod limiting block extends out of the limiting block groove, and the distance of the push-pull rod limiting block extending out of the inner wall of the spindle shell is smaller than the compression deformation distance of the spring A. Through the action of the spring A, the convex block A of the push-pull rod can normally pass through the push-pull rod limiting block.

In a further improvement of the invention, the rear end surface of the part of the push-pull rod limiting block extending out of the inner wall of the spindle shell is an inclined surface inclined from front to back. The rear end face of the push-pull rod limiting block is set to be the inclined plane, so that the convex block A of the push-pull rod can normally pass through the push-pull rod limiting block conveniently.

According to a further improvement scheme of the invention, a push-pull cover is arranged on the top of the spindle shell, the front end of the bottom of the push-pull cover is fixedly connected with an operation vertical plate of a push-pull pipe, a push-pull cover limiting block A is fixed on the front end of the top surface of the spindle shell, a push-pull cover limiting block B is fixed on the rear end of the top surface of the spindle shell, and the push-pull cover moves in a range between the push-pull cover limiting block A and the push-pull cover limiting block B. The push-pull operation of the push-pull pipe and the push-pull rod is facilitated through the action of the push-pull cover.

According to a further improvement scheme of the invention, when the push-pull cover moves forwards to the maximum stroke, the front end surface of the push-pull rod just clamps the bolt tightening device unit and the bolt tightening device clamping sleeve; when the push-pull cover moves backward to the maximum stroke, the front end surface of the push-pull rod is positioned at the rear side of the bolt tightening device rotating wheel.

In a further improvement scheme of the invention, two sides of the push-pull cover are provided with flanges downwards, and two side walls and two sides of the spindle shell and the flanges of the push-pull cover are provided with sliding chutes.

According to a further improvement of the invention, the outer surface of the push-pull cover is provided with anti-skid grains A.

In a further improvement of the invention, the top of the spindle housing and the movable range corresponding to the projection A are provided with notches communicating the inside and the outside of the spindle housing, and the notches extend forwards to the front end of the spindle housing.

In a further improvement scheme of the invention, the push-pull cover limiting block A is arranged at the front end of the notch and connects the two side groove walls of the notch, and the bottom of the push-pull cover limiting block A is higher than the top of the bump A.

According to a further improvement scheme of the invention, the bolt tightening device unit sequentially comprises a bolt tightening device head, a bolt tightening device main rod, a rod body clamping part and a hook pull ring groove from front to back, wherein the inner wall of the bolt tightening device clamping sleeve is a conical cambered surface, the rod body clamping part and the inner wall of the bolt tightening device clamping sleeve are clamped to be in interference fit, and the hook pull ring groove is matched with the drag hook. Through the structure of the bolt tightening device unit, the clamping with the clamping sleeve of the bolt tightening device and the connection with the draw hook of the push-pull rod can be realized.

According to a further improvement scheme of the invention, a plurality of axial ribs are axially arranged at the front end of the rod body clamping part, and the axial ribs are uniformly distributed on the surface of the main rod of the bolt tightening device. Through the action of the axial ribs, the weight of the bolt tightening device unit is reduced, the deformation amount of the clamping sleeve of the bolt tightening device is reduced, and the clamping degree of the bolt tightening device unit is further improved.

In a further improvement of the invention, the front end face of the axial rib is provided with a transition slope. The bolt tightening unit is conveniently inserted into the bolt tightening device clamping sleeve under the action of the transition slope.

In a further improvement of the invention, an annular transition slope a is provided between the bolt tightening device main rod and the bolt tightening device head. By the arrangement of the annular transition slope a, the entry of the bolt tightener unit into the bolt tightener collar is further facilitated.

In a further improvement of the invention, the front side groove wall of the hook pull ring groove is an annular transition slope B. The draw hook is convenient to be connected with the hook-pulling ring groove under the action of the annular transition slope B.

According to a further improved scheme of the invention, the rear side of the hooking ring groove is provided with a hooking baffle, and the diameter of the hooking baffle is smaller than or equal to that of the rod body clamping part and larger than that of the groove bottom of the hooking ring groove. The effect of the hook baffle ensures the connection effect of the hook and the hook ring groove.

The invention has the further improvement scheme that the bolt tightening device rotating wheel is sleeved on the sleeve through an axis through hole A, at least one limiting ball is arranged on the outer side wall of the sleeve and at a position corresponding to the bolt tightening device rotating wheel, a plurality of ball limiting grooves matched with the limiting balls are arranged in the axis through hole A of the bolt tightening device rotating wheel, and the included angle between two adjacent bolt tightening device storage through holes is integral multiple of the included angle between two adjacent ball limiting grooves; or the outer side wall of the sleeve is provided with a plurality of limiting balls corresponding to the positions of the bolt tightening device rotating wheels, at least one ball limiting groove matched with the limiting balls is arranged in the axis through hole A of the bolt tightening device rotating wheels, and the included angle between the two adjacent bolt tightening device storage through holes is integral multiple of the included angle between the two adjacent limiting balls. Through the effect of spacing ball, can guarantee the axial fixity between sleeve pipe and the bolt tightening ware runner and circumference fixed simultaneously, also be convenient for the rotation between bolt tightening ware runner and the sleeve pipe.

According to a further improved scheme of the invention, the limiting balls are respectively arranged in radial grooves which are arranged on the outer side wall of the sleeve along the radial direction, the diameter of each radial groove is equal to that of the limiting ball, a pre-stressed spring B is arranged between the groove bottom of each radial groove and the limiting ball, a limiting ring is fixed on a notch in each radial groove, the end surface of the outer side of the limiting ring is flush with the outer side wall of the corresponding position of the sleeve, and the inner diameter of the limiting ring is smaller than that of the limiting ball. Through the structure of radial groove, realized spacing ball and ball spacing groove be connected with the separation.

In a further improvement of the invention, the surface of the bolt tightening device rotating wheel is provided with anti-slip lines B.

The invention has the further improvement scheme that the vertical plate is respectively provided with a shaft hole A and a shaft hole B corresponding to the transmission shaft and the bolt tightening device clamping sleeve, the transmission gear A is fixedly connected with the front end of the transmission shaft and the rear side of the vertical plate in the circumferential direction, the rear end of the bolt tightening device clamping sleeve extends out of the vertical plate through the shaft hole B in the backward direction and is fixedly connected with a transmission gear B matched with the transmission gear A, and the transmission gear A is in meshing transmission with the transmission gear B. The transmission connection between the transmission shaft and the clamping sleeve of the bolt tightening device is realized through the action of the transmission gear A and the transmission gear B.

According to a further improvement of the invention, the diameter of the transmission gear B is larger than or equal to that of the transmission gear A. The torque of the bolt tightener unit in the bolt tightener chuck is further increased.

The invention has the further improvement scheme that the front end of the bolt tightening device clamping sleeve extends forwards out of the vertical plate through the shaft hole B, and the outer side wall of the bolt tightening device clamping sleeve positioned at the front end of the vertical plate is provided with a limiting stop ring. The axial limiting of the clamping sleeve of the bolt tightening device is realized.

According to a further improved scheme of the invention, the bottom end of the vertical plate is backwards provided with a connecting block, and the connecting block is provided with a buckle device for fixedly connecting with the connecting plate. Through the effect of connecting block, guaranteed the easy dismounting of riser

According to a further improved scheme of the invention, the front end face of the vertical plate is provided with a vertical rib, and the vertical rib is used for respectively connecting the shaft hole B with the shaft hole A and connecting the shaft hole A with the connecting block. Through the effect of the stud, the strength of the vertical plate is improved, and the supporting acting force of the vertical plate is guaranteed.

According to a further improvement scheme of the invention, a positive and negative rotation switch of the motor is arranged on the side wall of the spindle shell. Through the effect of positive and negative rotation switch, can realize screwing and unscrewing to the bolt of different screw directions.

In a further improvement of the invention, a battery power display lamp is arranged on the side wall of the spindle housing. Through the effect of battery power display lamp to can know the electric quantity condition of eating a little, so that change the battery or in time charge.

According to a further improvement scheme of the invention, a ventilation area is arranged on the side wall of the spindle shell and at a position corresponding to the motor, and a plurality of vent holes are uniformly distributed in the ventilation area. Through the effect of bleeder vent, avoid the motor to overheat and burn out.

The invention has the beneficial effects that:

according to the quick-replacement gun-type bolt tightening device, the set of bolt tightening device units are placed in the bolt tightening device rotating wheel, and the mode of replacing the bolt tightening device units is changed into a mode of directly operating the push-pull cover in a push-pull mode, so that the quick replacement of the bolt tightening device units is realized, and the operation efficiency is improved.

Description of the drawings:

fig. 1 is a perspective view of the present invention.

Fig. 2 is a front enlarged cross-sectional view of the transmission of the motor.

Fig. 3 is an enlarged perspective view of the connection of the bolt tightener wheel with the sleeve and the bolt tightener ferrule.

Fig. 4 is an enlarged schematic bottom sectional view of the connection of the bolt tightener wheel to the bushing and the bolt tightener collar.

Fig. 5 is an enlarged perspective view of the sleeve.

Fig. 6 is an enlarged perspective view of the bolt tightener push-pull device from a diagonally downward perspective.

Fig. 7 is an enlarged perspective view of the bolt tightener push-pull device from an oblique upward view.

Fig. 8 is an enlarged perspective view of the push-pull tube.

Fig. 9 is an enlarged perspective view of the push-pull rod.

Fig. 10 is an enlarged partial cross-sectional schematic view of the push-pull device bolt tightener push-pull device pushing the bolt tightener to the bolt tightener collar.

Fig. 11 is an enlarged schematic view of the riser.

Fig. 12 is a front enlarged schematic view of the bolt tightener unit.

The specific implementation mode is as follows:

as can be seen from fig. 1 to 12, the present invention includes a spindle housing 1, a motor 3 is fixed in the spindle housing 1, a motor output shaft 19 of the motor 3 extends forward and is in transmission connection with a bolt tightening tool sleeve 7 at a front end of the spindle housing 1 through a transmission shaft 4, the bolt tightening tool sleeve 7 is rotatably connected to a vertical plate 48, the vertical plate 48 is fixedly connected to a front end of the spindle housing 1 through a connection plate 9, a bolt tightening tool rotating wheel 6 is disposed between the spindle housing 1 and the vertical plate 48, an axial center through hole a62 of the bolt tightening tool rotating wheel 6 is coaxially sleeved on the transmission shaft 4 and is rotatably connected to the transmission shaft 4, a plurality of bolt tightening tool storing through holes 15 are uniformly distributed on an end surface of the bolt tightening tool rotating wheel 6 with a cylindrical surface thereof as a center of a circle, a bolt tightening tool unit 16 is respectively disposed in the bolt tightening tool storing through hole 15, and an axial center of the bolt tightening tool 7 is located on an axial center surrounded by the bolt tightening tool storing through holes 15 On the rear side of the bolt runner 6, in the spindle case 1, a bolt runner push-pull device is provided, which is arranged coaxially with the bolt runner collar 7, to push the bolt runner unit 16 into the bolt runner collar 7 from the bolt runner storing through-hole 15 corresponding to the position of the bolt runner collar 7 or to pull the bolt runner unit 16 back from the bolt runner collar 7 into the bolt runner storing through-hole 15 corresponding to the position of the bolt runner collar 7; the bottom rear side of main shaft shell 1 is fixed with hand (hold) 2, the hand (hold) 2 internal fixation has the battery, the bottom of main shaft shell 1, be located hand (hold) 2 the place ahead and be equipped with and be used for controlling motor pivoted button 8.

Motor output shaft 19 is fixed with sun gear A20, the meshing transmission has a plurality of planet wheel A21 around sun gear A20, planet wheel A21 is fixed in the one end of pivot A26 respectively, the other end of pivot A26 is fixed with planet wheel B22, planet wheel B22 all meshes the transmission with sun gear B23 and is connected, sun gear B23's pivot B24 is coaxial with motor output shaft 19, the one end that motor 3 was kept away from to pivot B24 is connected with the coaxial transmission of transmission shaft 4.

The rotating shafts A26 are respectively in rotating connection with the planet carrier 27, and the planet carrier 27 is fixedly connected with the inner wall of the main shaft shell 2.

The rotating shaft A26 and the rotating shaft B24 are respectively and rotationally connected with the planet carrier 27 through bearings.

The diameter of the sun gear A20 is smaller than that of the planet gear A21, the diameter of the planet gear A21 is larger than that of the planet gear B22, and the diameter of the planet gear B22 is smaller than that of the sun gear B23.

The transmission shaft 4 is coaxially connected with the rotating shaft B24 in a transmission way through a coupler 25.

The bolt tightening device push-pull device comprises a sleeve 5 sleeved on the transmission shaft 4 and a push-pull pipe 10 which is positioned on the upper side of the transmission shaft 4 and reciprocates along the axial direction of the transmission shaft 4, wherein the sleeve 5 is rotatably connected with the transmission shaft 4, and the front end and the rear end of the sleeve 5 are axially limited with the transmission shaft 4 through a vertical plate 48 and the main shaft shell 1 respectively; the push-pull pipe 10 is movably connected with the sleeve 5, and the transmission shaft 4 is rotatably connected with an axial center through hole B17 arranged on the sleeve 5.

A plurality of axially arranged strip-shaped grooves 43 are uniformly distributed on the surface of the sleeve 5, two adjacent strip-shaped grooves 43 are communicated through a connecting groove 46 respectively, the connecting groove 46 is positioned at the rear end of the strip-shaped groove 43, and the connecting grooves 46 are inclined along the same direction; a sliding block 29 is fixed at the bottom of the push-pull pipe 10 and at the rear end position, the sliding block 29 moves along a strip-shaped groove 43 and a connecting groove 46, and the outer diameter of the push-pull pipe 10 is matched with the inner diameter of the bolt tightening device storage through hole 15; the number of the strip-shaped grooves 43 is equal to the number of the bolt runner storing through-holes 15 of the bolt runner 6.

The bar groove 43 includes a shallow groove 44 and a deep groove 45, the shallow groove 44 is located the rear side of the deep groove 45, the forward extension face of the rear side groove wall of the connecting groove 43 coincides with the step vertical face formed at the junction of the shallow groove 44 and the deep groove 45 corresponding to the bar groove 43, the groove bottom of the connecting groove 46 is inclined upward from front to back along the direction of the connecting groove 46, and the groove bottom depth of the front end of the connecting groove 46 is greater than or equal to the groove depth of the deep groove 45, and the groove bottom depth of the rear end of the connecting groove 46 is less than or equal to the groove depth of the shallow groove 44.

The front end pipe orifice of the push-pull pipe 10 is open, a notch A31 is arranged on the upper side of the rear end of the side wall of the push-pull pipe 10, an operation vertical plate 30 is arranged on the lower portion of the side wall of the rear end of the push-pull pipe 10 in an upward mode, a push-pull rod 11 penetrates through the push-pull pipe 10, the outer wall of the push-pull rod 11 is matched with the inner wall of the push-pull pipe 10, the rear end of the push-pull rod 11 is located in the notch A31, the front end of the push-pull rod 11 extends forwards out of the front end pipe orifice of the push-pull pipe 10, a limit baffle 33 matched with the outer diameter of the push-pull pipe 10 is arranged at the front end of the push-pull rod 11, a bump A34 is fixed on the upper portion of the rear end face of the push-.

The draw hook 40 is fixed at the front end of the long axial rod 38, a bump B39 is arranged at the rear end of the long axial rod 38 and on the side where the draw hook 40 is located, the push-pull rod 11 is provided with an axial slotted hole 42 corresponding to the long axial rod 38, the front end of the axial slotted hole 42 extends to the front end of the push-pull rod 11 and extends to the side wall of the push-pull rod 38 corresponding to one side of the draw hook 40 to form a notch B36, the rear end of the axial slotted hole 42 extends to a position within the notch A31, extends to the side wall of the push-pull rod 38 corresponding to one side of the bump B39 to form a strip-shaped through hole A37, and the bump B39 is located in the strip-shaped through hole A59.

The end face of the long axial rod 38, which is back to the strip-shaped through hole A37, is provided with a protruding fulcrum 72, and the protruding fulcrum 72 is in contact with the groove wall of the axial groove hole 42, which is back to the strip-shaped through hole A37, so that the long axial rod 38 forms a lever structure; in a free state, one end of the axially long rod 38 corresponding to the projection B39 is tilted, the projection B39 extends outwards out of the strip-shaped through hole A37, and the distance between the draw hook 40 and the axle center of the push-pull rod 11 is smaller than or equal to the radius of the limit baffle 33.

The surface of the side wall of the push-pull pipe 10 is provided with a strip-shaped through hole B32 communicating the inside and the outside of the push-pull pipe 10, the top of the outer side wall of the push-pull rod 11 is provided with a convex column 35 at a position between the bump A34 and the limit baffle 33, the diameter of the convex column 35 is matched with the width of the strip-shaped through hole B32 and moves along the strip-shaped through hole B32, and the strip-shaped through hole B32 inclines to one side of the push-pull pipe 10 along the direction from front to back; when the protruding column 35 moves to the foremost end of the strip-shaped through hole B32, the protrusion a34 is located above the push-pull rod 11, and when the protruding column 35 moves to the rearmost end of the strip-shaped through hole B32, the strip-shaped through hole a37 is located above the push-pull rod 11, and the protrusion a34 is located on the side of the push-pull rod 11; in the range of the movement of the convex column 35 along the strip-shaped through hole B32, the convex block B39 in the strip-shaped through hole A37 is always positioned in the notch A31 and extends out of the strip-shaped through hole A37, and the distance between the draw hook 40 and the axis of the push-pull rod 11 is less than or equal to the radius of the limit baffle 33.

When the push-pull pipe 10 and the push-pull rod 11 move backwards to the maximum stroke along the strip-shaped groove 43, the protruding column 35 is located at the foremost end of the strip-shaped through hole B32, the protruding block B39 is located at one side of the push-pull rod 11, a protruding block C (the protruding block C is not shown in the drawings in the specification) is arranged on the inner wall of the main shaft housing 1 and at a position corresponding to the protruding block B39, the protruding block B39 in the strip-shaped through hole a37 is blocked by the protruding block C and located in the push-pull rod 11, and the distance between the pull hook 40 and the axis of the push-pull rod 11 is greater than the radius of the limit baffle.

When the projection a34 is located on the side of the push-pull rod 11, the rear end face of the projection a34 is attached to the front end face of a push-pull rod stopper (not shown in the drawings) provided on the inner wall of the spindle housing 1 and corresponding to the projection a 34.

The push-pull rod limiting block is positioned in the limiting block groove, a spring A is arranged between the push-pull rod limiting block and the groove bottom of the limiting block groove, and the push-pull rod limiting block moves in a reciprocating mode along the limiting block groove in a direction perpendicular to the inner wall of the main shaft shell 1; when the spring a is in a natural state, the push-pull rod limiting block extends out of the limiting block groove, and the distance that the push-pull rod limiting block extends out of the inner wall of the spindle housing 1 is smaller than the compression deformation distance of the spring a (in the attached drawings of the specification, the push-pull rod limiting block, the spring a and the limiting block groove are not shown).

The rear end face of the part of the push-pull rod limiting block extending out of the inner wall of the spindle shell 1 is an inclined plane which inclines from front to back to outside.

The top of the spindle shell 1 is provided with a push-pull cover 12, the front end of the bottom of the push-pull cover 12 is fixedly connected with an operation vertical plate 30 of a push-pull pipe 10, the front end of the top surface of the spindle shell 1 is fixedly provided with a push-pull cover limiting block A56, the rear end of the top surface of the spindle shell is fixedly provided with a push-pull cover limiting block B57, and the push-pull cover 12 moves in the range between the push-pull cover limiting block A56 and the push-pull cover limiting block B57.

The front end of the bottom of the push-pull cover 12 is fixedly connected with an operation vertical plate 30 of the push-pull pipe 10 through a bolt.

When the push-pull cap 12 moves forward to the maximum stroke, the front end surface of the push-pull rod 10 just grips the bolt tightener unit 16 with the bolt tightener collar 7; when the push-pull cap 12 is moved rearward to the maximum stroke, the front end surface of the push-pull rod 10 is located on the rear side of the bolt runner 6.

Two sides of the push-pull cover 12 are provided with flanges downwards, and two side walls and two sides of the spindle housing 1 and the flanges of the push-pull cover 12 are provided with sliding grooves 54.

The outer surface of the push-pull cover 12 is provided with anti-skid grains A58.

The top of the spindle housing 1, corresponding to the movable range of the projection A34, is provided with a notch 55 communicating the inside and the outside of the spindle housing 1, and the notch 55 extends forwards to the front end of the spindle housing 1.

The push-pull cover limiting block A56 is arranged at the front end of the notch 55 and connects the two side groove walls of the notch 55, and the bottom of the push-pull cover limiting block A56 is higher than the top height of the bump A34.

The bolt tightening device unit 16 sequentially comprises a bolt tightening device head 63, a bolt tightening device main rod 66, a rod body clamping part 67 and a hook pull ring groove 70 from front to back, the inner wall of the bolt tightening device clamping sleeve 7 is a conical arc surface, the rod body clamping part 67 is clamped to be in interference fit with the inner wall of the bolt tightening device clamping sleeve 7, and the hook pull ring groove 70 is matched with the drag hook 40.

The front end of the rod body clamping part 67 is provided with a plurality of axial ribs 68 along the axial direction, and the axial ribs 68 are uniformly distributed on the surface of the main rod 66 of the bolt tightening device.

The front end face of the axial rib 68 is provided with a transition slope surface 69.

An annular transition slope A is arranged between the bolt tightening device main rod 66 and the bolt tightening device head 63.

The front side groove wall of the hook ring groove 70 is an annular transition slope B.

The rear side of the hook ring groove 70 is a hook baffle 71, and the diameter of the hook baffle 71 is smaller than or equal to that of the rod body clamping part 67 and larger than that of the groove bottom of the hook ring groove 70.

The bolt tightening device rotating wheel 6 is sleeved on the sleeve 5 through an axle center through hole A62, at least one limiting ball 47 is arranged on the outer side wall of the sleeve 5 at a position corresponding to the bolt tightening device rotating wheel 6, a plurality of ball limiting grooves 64 matched with the limiting ball 47 are arranged in the axle center through hole A62 of the bolt tightening device rotating wheel 6, and the included angle between two adjacent bolt tightening device storing through holes 15 is integral multiple of the included angle between two adjacent ball limiting grooves 64; or a plurality of limiting balls 47 are arranged on the outer side wall of the sleeve 5 at positions corresponding to the bolt tightening device rotating wheel 6, at least one ball limiting groove 64 matched with the limiting balls 47 is arranged in the axis through hole A62 of the bolt tightening device rotating wheel 6, and the included angle between two adjacent bolt tightening device storing through holes 15 is integral multiple of the included angle between two adjacent limiting balls 47.

The limiting balls 47 are respectively arranged in radial grooves arranged on the outer side wall of the sleeve 5 along the radial direction, the diameter of each radial groove is equal to that of the limiting ball 47, a spring B with pre-pressure is arranged between the groove bottom of each radial groove and the limiting ball 47, a limiting ring is fixed on a notch in each radial groove, the end surface of the outer side of the limiting ring is flush with the outer side wall of the position corresponding to the sleeve 5, and the inner diameter of the limiting ring is smaller than that of the limiting ball 47.

The surface of the bolt tightener wheel 6 is provided with anti-slip threads B65.

The vertical plate 48 is respectively provided with a shaft hole A50 and a shaft hole B51 corresponding to the transmission shaft 4 and the bolt tightening device clamping sleeve 7, the front end of the transmission shaft 4 and the rear side of the vertical plate 48 are fixedly connected with a transmission gear A13 in the circumferential direction, the rear end of the bolt tightening device clamping sleeve 7 extends backwards out of the vertical plate 48 through the shaft hole B51 and is fixedly connected with a transmission gear B14 matched with the transmission gear A13, and the transmission gear A13 is in meshing transmission with the transmission gear B14.

The diameter of the transmission gear B14 is larger than or equal to that of the transmission gear A13.

The front end of the bolt tightening device clamping sleeve 7 extends forwards out of the vertical plate 48 through the shaft hole B51, and the bolt tightening device clamping sleeve 7 is positioned on the outer side wall of the front end of the vertical plate 48 and is provided with a limiting stop ring 72.

The bottom end of the vertical plate 48 is provided with a connecting block 49 backwards, and the connecting block 49 is provided with a buckle device 53 for fixedly connecting with the connecting plate 9.

The front end face of the vertical plate 48 is provided with a vertical rib 52, and the vertical rib 52 connects the shaft hole B51 and the shaft hole A50, and the shaft hole A50 and the connecting block 49 respectively.

The side wall of the spindle shell 1 is provided with a forward and reverse rotation switch 61 of the motor 3.

The side wall of the spindle housing 1 is provided with a battery power display lamp 60.

The side wall of the spindle housing 1 and the position corresponding to the motor 3 are provided with a ventilation area 59, and a plurality of vent holes are uniformly distributed in the ventilation area.

When the present invention is used, the bolt tightening wheel 6 including the bolt tightening unit 16 to be used is selected first, and the push-pull cover 12 is secured at the maximum stroke of the rear end.

Then the bolt tightening device rotating wheel 6 is sleeved on the sleeve 5, the limiting ball 47 is clamped and limited with the ball limiting groove 64, then the vertical plate 48 is fixed with the connecting plate 9, and meanwhile, the transmission shaft 4 is ensured to be rotatably connected with the shaft hole A50.

By rotating the bolt runner 6, the bolt runner storing through-holes 15 of the bolt runner unit 16, when only the required use is required, are rotated to positions corresponding to the bolt runner ferrules 7.

Then, the push-pull cover 12 is pushed forwards to drive the push-pull pipe 10 and the push-pull rod 11 to push forwards along the strip-shaped groove 43 of the sleeve 5; when the limit stop 33 of the push-pull rod 11 comes into contact with the hook stop 71 of the bolt tightener unit 16 to be used, the push-pull rod 11 is temporarily stopped, and the push-pull pipe 10 continues to be pushed forward by the push-pull cap 12; the push-pull rod 11 is thus moved rearward with respect to the push-pull pipe 10, so that the projecting column 35 of the push-pull rod 11 is caused to move rearward along the strip-shaped through hole B32 of the push-pull pipe 10, and the push-pull rod 11 is rotated while moving rearward with respect to the push-pull pipe 10, and when the projecting column 35 of the push-pull rod 11 moves to the rear end of the strip-shaped through hole B32, the projection a34 of the push-pull rod 11 is rotated to the side of the push-pull rod 11, and the hook 40 of the push-pull rod 11 extends into the hook-pull ring groove 70 of the bolt tightener unit 16.

Then, the bolt runner unit 16 is moved forward by the push-pull pipe 10 and the push-pull rod 11 with continued pushing of the push-pull cap 12, and is extended out of the bolt runner storage through-hole 15 until the rod body gripping portion 67 of the bolt runner unit 16 is gripped with the bolt runner insert 7.

When the rod body gripping portion 67 of the bolt tightener unit 16 grips the bolt tightener collar 7, the hook pull ring groove 70 of the bolt tightener is located at a position between the bolt tightener runner 6 and the bolt tightener collar 7, and further the projection a34 of the push-pull rod 11 just passes through the push-pull rod stopper as well, and the rear end face of the projection a34 comes into contact with and abuts against the front end face of the push-pull rod stopper.

Finally, the screw can be tightened or loosened by actuating the button 8 after aligning the screw tightening unit 16 with the screw, depending on the direction of the screw to be tightened and the direction of rotation of the motor 3 selected by the forward and reverse rotation switch 61.

When it is necessary to additionally use another bolt tightening tool, it is first necessary to pull the present bolt tightening tool unit 16 back into the bolt tightening tool storing through-hole 15 of the bolt tightening wheel 6. The operation flow is as follows:

the push-pull cover 12 is pulled backwards to drive the push-pull pipe 10 to move backwards along the strip-shaped groove 43 of the sleeve; at this time, since the draw hook 11 of the push-pull rod 11 hooks the draw hook ring groove 70 of the bolt tightener unit 16 and the rod body catching portion 67 of the bolt tightener unit 16 catches the bolt tightener catching sleeve 7, so that the push-pull rod 11 is temporarily not moved backward, the push-pull rod 11 is moved forward with respect to the push-pull pipe 10 at this time, so that the protrusion column 35 of the push-pull rod 11 is caused to move forward along the strip-shaped through hole B32 of the push-pull pipe 10, thereby rotating the push-pull rod 11 while moving forward with respect to the push-pull pipe 10, and the protrusion a is separated from the push-pull rod stopper as the push-pull rod 11 rotates; when the protruding post 35 of the push-pull rod 11 moves to the front end of the strip-shaped through hole B32, the protrusion a of the push-pull rod 11 rotates to the upper side of the push-pull rod 11, and the protrusion B39 rotates to the side of the push-pull rod 11.

The bolt driver unit 16 is then moved back into the bolt driver storage through-hole 15 by the push-pull cap 12 being pulled further by the push-pull tube 10 and the push-pull rod 11 against the friction force with the bolt driver socket 7.

When the sliding block 29 of the push-pull pipe 10 moves backwards along the deep groove 45 of the strip-shaped groove 43 to the joint of the deep groove 45 and the shallow groove 44, the sliding block 29 is blocked by the step vertical surface formed at the joint of the shallow groove 44 and the deep groove 45; with the continued pulling of the push-pull cap 12, the slider 29 of the push-pull tube 10 continues to move rearward relative to the sleeve 5, thereby moving rearward along the connecting groove 46 into the shallow groove 44 of the other strip-shaped groove 43 adjacent to the current strip-shaped groove 43.

When the slide block 29 of the push-pull pipe 10 just leaves the deep groove 45 and enters the transition groove 46, the bolt runner storage through-hole 15 of the bolt runner 6 is protruded just rearward in the hooking ring groove 70 of the bolt runner unit 16; when the sliding block 29 of the push-pull pipe 10 is located at the position of the transition groove 46, the projection B39 of the push-pull rod 11 contacts with the projection C arranged on the inner wall of the main shaft housing 1, the projection B39 in the strip-shaped through hole a37 is blocked by the projection C and is located in the push-pull rod 11, at this time, the distance between the draw hook 40 and the axis of the push-pull rod 11 of the long axial rod 38 is greater than the radius of the limit baffle 33, at this time, the draw hook 40 is separated from the hook-pull-ring groove 70, and the sleeve 5 drives the bolt tightener rotating.

When the slide block 29 of the push-pull pipe 10 moves backward into the shallow groove 44 of the adjacent other strip groove 43 by the push-pull cover 12, the sleeve 5 rotates the bolt runner 6 to make the bolt runner collar 7 coaxially correspond to the other bolt runner storage through-hole 15 adjacent to the bolt runner storage through-hole 15 before the bolt runner 6.

If the bolt tightening unit 16 in the adjacent bolt tightening tool storage through-hole 15 is the bolt tightening unit 16 that needs to be used, the previous operation using the bolt tightening unit 16 may be directly repeated.

If the desired bolt tightening unit 16 is still in the bolt tightening wheel 6, but is not the bolt tightening unit 16 in the adjacent bolt tightening storage through hole 15, the above-described method regarding pushing out the bolt tightening unit 16 and pulling back the bolt tightening unit 16 may be repeated until the desired bolt tightening unit 16 is pushed out; it is also possible to pull the bolt tightening tool insert 7 coaxially corresponding to the bolt tightening tool sleeve directly by manually rotating the bolt tightening wheel 6 to the bolt tightening tool storing through-hole 15 storing the desired bolt tightening tool unit 16, and then repeat the operation previously using the operation method of the bolt tightening tool unit 16.

If the desired bolt tightener unit 16 is not in the bolt tightener wheel 6, the riser 48 needs to be removed, the bolt tightener wheel 6 on the casing 5 is then removed, the bolt tightener wheel 6 containing the desired bolt tightener unit 16 is selected again, and the operation previously performed using the operating method of the present invention is repeated.

Claims

1. A bolt tightener unit for a gun bolt tightener, characterized in that: by preceding bolt tightening ware head (63), bolt tightening ware mobile jib (66), body of rod clamping part (67) and the hook draw ring groove (70) of including in proper order backward, the inner wall block to interference fit of body of rod clamping part (67) and bolt tightening ware cutting ferrule (7), the inner wall of bolt tightening ware cutting ferrule (7) is the circular cone cambered surface, and hook draw ring groove (70) are located body of rod clamping part (67) and go up the one end far away from bolt tightening ware head (63), hook draw ring groove (70) and drag hook (40) match.

2. The bolt tightener unit for a gun-type bolt tightener of claim 1, wherein: the front end of the rod body clamping part (67) is provided with a plurality of axial ribs (68) along the axial direction, and the axial ribs (68) are uniformly distributed on the surface of the main rod (66) of the bolt tightening device.

3. The bolt tightener unit for a gun-type bolt tightener of claim 2, wherein: the front end face of the axial rib (68) is provided with a transition slope surface (69).

4. The bolt tightener unit for a gun-type bolt tightener of claim 1, wherein: an annular transition slope A is arranged between the bolt tightening device main rod (66) and the bolt tightening device head (63).

5. The bolt tightener unit for a gun-type bolt tightener of claim 1, wherein: the front side groove wall of the hook pull ring groove (70) is an annular transition slope B.

6. The bolt tightener unit for a gun-type bolt tightener of claim 1, wherein: the rear side of hook draw ring groove (70) is hook draw baffle (71), the diameter less than or equal to the diameter of body of rod chucking portion (67) of hook draw baffle (71) to be greater than the diameter of hook draw ring groove (70) tank bottom.