CN213498865U - Cylindrical roller type torque wrench - Google Patents

Abstract

The utility model provides a cylinder roller formula torque wrench, which comprises a housin, be equipped with actuating mechanism on the casing, be equipped with drive mechanism and actuating mechanism in the casing, actuating mechanism passes through drive mechanism and actuating mechanism and connects, actuating mechanism is equipped with the pivot, the one end of pivot extends to the casing outside, actuating mechanism includes the oil feed assembly, the oil feed assembly is connected through first inlet port and second inlet port and drive mechanism, drive mechanism includes the cylinder body, be equipped with the piston rod in the cylinder body, the piston rod passes through the rocking arm and the actuating mechanism is connected, actuating mechanism still is equipped with the ratchet, the ratchet is located the rocking arm, the ratchet includes cylindrical roller, ratchet and pivot are connected. The utility model discloses compact structure, design benefit, ratchet atress are even, adopt the cylindrical roller assembly of circumference equipartition as the transmission between rocking arm and the ratchet, cylindrical roller is in large quantity, and area of contact is big, thereby the ratchet pawl contact surface of having solved current hydraulic torque wrench connects the problem limited, that stress concentration leads to life weak point.

Description

Cylindrical roller type torque wrench

Technical Field

The utility model belongs to the technical field of the erecting tool technique and specifically relates to a cylinder roller formula torque wrench is related to.

Background

The hydraulic torque wrench is an indispensable tool in the process of disassembling the large-caliber bolt. For traditional manpower mechanical wrench, hydraulic torque spanner is light more, can be in narrow space operation, in addition, hydraulic torque spanner can provide the incomparable big moment of torsion of manpower under the application of superhigh pressure hydraulic pressure technique. The torque precision of the hydraulic torque wrench acting on the bolt can reach +/-3% due to the fine design of a transmission mechanism of the hydraulic torque wrench. Most of the reasons of the failure of mechanical equipment are that bolts fall off due to the fact that the bolts are not tightened according to the standard of operation torque, or the torque strength is too large and exceeds the yield strength of the bolts, so that early failure is caused. Therefore, people select hydraulic torque wrench to accomplish the pretension work of high strength bolt, however, the existing wrench has the defects that the ratchet and pawl contact area is small, the capability of transferring torque is not strong, the wrench is unstable during use, the fatigue limit is low, and the service life is short, so that a novel hydraulic torque wrench is necessary to be developed to meet the daily production requirement.

Chinese patent document CN102848346A describes a driving hydraulic wrench, which completes the screwing operation through the housing of the cylinder, the rear cover of the sealed cylinder, the oil pipe assembly, the piston assembly, the ratchet assembly and the reaction arm, and this structure mainly uses the tooth-shaped pawl to complete the torque transmission, which has the problems of weak transmission torque and short service life. Chinese patent document CN107457736A describes an optimized hydraulic torque wrench, which is connected to a reaction ring gear by a spline, and the reaction ring gear is connected to a reaction arm to complete torque transmission, and there are also problems of weak transmission torque and short service life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a compact structure, design benefit, ratchet atress are even to with hydraulic drive's hydraulic torque wrench, thereby solve current hydraulic torque wrench's ratchet pawl contact surface and connect the problem that the life that the limit leads to is short.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a cylindrical roller type torque wrench comprises a shell, wherein a driving mechanism is arranged on the shell, a transmission mechanism and an actuating mechanism are arranged in the shell, the driving mechanism is connected with the actuating mechanism through the transmission mechanism, the actuating mechanism is provided with a rotating shaft, and one end of the rotating shaft extends to the outer side of the shell;

the driving mechanism comprises an oil inlet assembly, and the oil inlet assembly is connected with the transmission mechanism through a first oil inlet hole and a second oil inlet hole;

the transmission mechanism comprises a cylinder body, a piston rod is arranged in the cylinder body, and the piston rod is connected with the actuating mechanism through a rocker arm;

the actuating mechanism is also provided with a ratchet wheel, the ratchet wheel is positioned in the rocker arm and comprises a cylindrical roller, and the ratchet wheel is connected with the rotating shaft.

In the preferred scheme, equipartition ratchet internal spline on the ratchet inner wall, a plurality of profile of tooth district of the outward flange evenly distributed of ratchet, a plurality of profile of tooth district end to end connection, the structure in profile of tooth district is: including first concave part and first convex part, first concave part and first convex part are connected, and first concave part includes first ratchet tooth district and second ratchet tooth district, and first ratchet tooth district and second ratchet tooth district are connected, and fourth ratchet tooth district is established to first convex part, and first ratchet tooth district and second ratchet tooth district are nearer apart from the ratchet center, and fourth ratchet tooth district is far away apart from the ratchet center, still is equipped with third ratchet tooth district between second ratchet tooth district and the fourth ratchet tooth district.

In the preferred scheme, be equipped with a plurality of evenly distributed's joint district along the circumference in the rocking arm inboard, a plurality of joint district end to end connection, the structure of joint district is: the rocker arm structure comprises a second concave part and a second convex part, wherein the second concave part is connected with the second convex part, the second concave part comprises a first rocker arm groove area and a second rocker arm groove area, the second convex part comprises a fourth rocker arm groove area, the fourth rocker arm groove area is closer to the center of a rocker arm, the first rocker arm groove area and the second rocker arm groove area are farther from the center of the rocker arm, and a third rocker arm groove area is arranged between the second rocker arm groove area and the fourth rocker arm groove area;

the cylindrical roller is positioned between the notch and the concave part of the tooth-shaped area, the upper end of the rocker arm is also provided with a pin shaft hole, and the pin shaft hole is connected with the piston rod through a pin shaft.

In the preferred scheme, the cover is equipped with first push pedal and second push pedal in the pivot, and first push pedal and second push pedal set up in the rocking arm both sides relatively respectively, are equipped with the draw-in groove in first push pedal and the second push pedal respectively, and the structure of draw-in groove is: the device comprises a plurality of outer limiting parts and a plurality of inner limiting parts which are uniformly distributed along the circumferential direction, wherein the outer limiting parts and the inner limiting parts are oppositely arranged, cylindrical roller limiting grooves are arranged between the outer limiting parts and the inner limiting parts, the outer limiting parts comprise a first outer side rail, a second outer side rail, a third outer side rail and a fourth outer side rail, the first outer side rail, the second outer side rail, the third outer side rail and the fourth outer side rail are respectively connected end to end, the shapes of the first outer side rail, the second outer side rail, the third outer side rail and the fourth outer side rail are respectively matched with a first rocker arm groove area, a second rocker arm groove area, a third rocker arm groove area and a fourth rocker arm groove area, the inner limiting parts comprise a first inner side rail, a second inner side rail, a third inner side rail and a fourth inner side rail, the first inner side rail, the second inner side rail, the third inner side rail and the fourth inner side rail are respectively connected end to end, the shapes of the first inner side track, the second inner side track, the third inner side track and the fourth inner side track are respectively matched with the first ratchet tooth area, the second ratchet tooth area, the third ratchet tooth area and the fourth ratchet tooth area, the cylindrical roller limiting groove comprises a groove bottom and an ascending slope, and the groove bottom is connected with the ascending slope;

a plurality of stop notches are uniformly formed in the outer side of the first push plate and the outer side of the second push plate along the circumferential direction respectively.

In the preferred scheme, the cylinder roller both ends are supported and are leaned on respectively in the draw-in groove of first push pedal and second push pedal, and the profile of tooth district and joint district are run through at the cylinder roller both ends, and the cylinder roller both ends are equipped with the cylinder hole respectively, are equipped with cylinder roller bayonet lock spring in the cylinder hole, are equipped with the cylinder roller bayonet lock on the cylinder roller bayonet lock spring, and cylinder roller bayonet lock is at the downthehole spring axis reciprocating motion that follows of cylinder.

In a preferable scheme, the oil inlet assembly comprises a second joint, a first joint and an oil inlet valve seat which are oppositely arranged, the second joint is connected with the first joint in a buckling manner, the second joint and the first joint are respectively provided with an oil inlet, one end of the oil inlet is connected with an oil guide hole, one side of the oil guide hole, which is far away from the oil inlet, is provided with an oil guide groove, the oil inlet valve seat is of a hollow structure, two sides of the oil inlet valve seat are symmetrically provided with supporting shafts, the supporting shafts are provided with oil guide channels, the middle of the supporting shafts is provided with a pressure relief opening, the oil guide channels are connected with the pressure relief opening, the second joint and the first joint are respectively connected with the supporting shafts at two sides in a rotatable manner, the oil inlet valve seat comprises a first oil guide ring groove and a second oil guide ring groove, the second oil guide ring groove is positioned above the first oil guide ring groove, and, an oil guide core is arranged in the middle of the oil inlet valve seat in a penetrating mode, an oil inlet sealing cover is arranged on the oil inlet valve seat, and the oil inlet sealing cover is connected with the oil guide core through screws.

In the preferred scheme, the anti-collision device further comprises a stopper, the stopper comprises a stop rod, a first jumping head and a second jumping head are arranged at two ends of the stop rod respectively, two stop arms are arranged in the middle of the stop rod and are arranged on two sides of the rocker arm respectively, the two stop arms abut against the stop notches of the first push plate and the second push plate respectively, and the first jumping head and the second jumping head are located in the fixing grooves in the shell respectively.

In the preferred scheme, a threaded hole is formed in the upper end of the oil guide core, a through hole is formed in the middle of the oil inlet sealing cover and is located right above the threaded hole, the through hole and the threaded hole are coaxial, the oil guide core and the oil inlet sealing cover are respectively provided with a limiting hole, the two limiting holes are arranged oppositely, and a first oil guide hole and a second oil guide hole are further formed in the lower portion of the oil guide core relatively.

In the preferred scheme, the pivot both ends are overlapped respectively and are equipped with the uide bushing, and the uide bushing one side of keeping away from the pivot output is equipped with the pivot rear end cap, pivot rear end cap and pivot threaded connection, and uide bushing one side that is close to the pivot output is equipped with pivot front end cap, pivot front end cap and pivot threaded connection.

In the preferred scheme, the piston rod is articulated through spacing sliding sleeve and piston, and the piston rod is slided and is located in the pneumatic cylinder body, and pneumatic cylinder one end is equipped with lid behind the pneumatic cylinder, lid and casing threaded connection behind the pneumatic cylinder, and casing one end is equipped with reaction arm connection spline, and the terminal surface that reaction arm connection spline is equipped with the spacing hole of reaction arm, still is equipped with the reaction arm, and the reaction arm is located casing one side, is equipped with in the middle of the reaction arm and connects spline assorted spread groove with the reaction arm, and the reaction arm passes through reaction arm bayonet socket and reaction arm eave tile and is connected.

The utility model relates to a beneficial effect that cylinder roller formula torque wrench brought is:

1) the product is durable: according to the cylindrical roller type hydraulic torque wrench, the oil inlet assembly is positioned at the upper right end of the piston cylinder, so that a region with high pressure intensity of a rodless piston cavity is avoided, and the durability of the hydraulic cylinder is improved;

2) and (3) stabilizing: the piston of the cylindrical roller hydraulic torque wrench is provided with the variable-gap sealing groove, and the variable-gap sealing technology is adopted, so that the abrasion of the piston on the inner wall of the hydraulic cylinder caused by the unbalance loading problem is greatly reduced, and the service life of the hydraulic cylinder is prolonged;

3) high efficiency: the cylindrical roller assembly which is uniformly distributed on the circumference is innovatively adopted as a transmission device between the rocker arm and the ratchet wheel, the number of the cylindrical rollers is far more than that of pawls used by a common hydraulic ratchet wheel torque wrench, and the contact surface between a single cylindrical roller assembly and the ratchet wheel rocker arm is also greatly increased.

4) Economy: after adopting this design, the cylindrical roller of circumference equipartition can make the ratchet atress more even, and then solves the problem that the stress concentration that exists when current hydraulic torque spanner ratchet atress leads to is short-lived, satisfies daily production demand.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of an oil intake assembly of the present invention;

FIG. 4 is a cross-sectional view of the oil intake assembly of the present invention;

FIG. 5 is a cross-sectional view of the oil wick of the present invention;

FIG. 6 is a right side cross-sectional view of the present invention;

FIG. 7 is a schematic view of the housing structure of the present invention;

FIG. 8 is a cross-sectional view of the housing of the present invention;

FIG. 9 is a schematic structural view of a transmission assembly according to the present invention;

FIG. 10 is a cross-sectional view of a piston rod assembly of the present invention;

FIG. 11 is a view showing the connection between the stopper lever and the first push plate according to the present invention;

FIG. 12 is a rocker arm and ratchet drive diagram of the present invention;

FIG. 13 is a schematic view of a ratchet structure of the present invention;

FIG. 14 is a schematic view of a rocker arm configuration of the present invention;

FIG. 15 is a schematic view of a first pusher plate according to the present invention;

FIG. 16 is a schematic view of the cylindrical roller structure of the present invention;

FIG. 17 is a schematic view of the present invention in conjunction with various rotary joints.

In the figure: a reaction arm sheath 1; a reaction arm 2; a counterforce arm latch seat 3; a reaction arm hook 4; a piston 5; a hydraulic cylinder rear cover 6; an oil guide core 7; a first interface 8; an oil inlet closing cap 9; an oil inlet valve seat 10; an oil inlet gasket 11; a limiting sliding sleeve 12; a piston rod 13; a rocker arm 14; a cylindrical roller 15; a rotating shaft 16; a ratchet wheel 17; a housing 18; a second interface 19; a sealing threaded hole 20; a rotating shaft front end cover 21; a seal screw 22; a first jump head 23; an oil intake assembly 24; an interface seal ring 25; an oil guide groove 26; an oil guide passage 27; a pressure relief port 28; a first inlet valve seat oil guide hole 29; the interface connection threaded hole 30; a threaded hole 31; an oil inlet 32; an oil guide hole 33; a second inlet port valve seat oil guide hole 34; an oil guide core seal ring 35; a first oil guide ring groove 36; a second oil guide ring groove 37; the first oil guide hole 38; the second oil guide hole 39; a limiting hole 40; a hydraulic cylinder rear cover seal ring 41; a piston seal ring 42; a limit sliding sleeve seal ring 43; a pin 44; a first push plate 45; a second push plate 46; a variable gap seal groove 47; a reaction arm limiting hole 48; the reaction arm is connected with a spline 49; a fixing groove 50; a rotation stop hole 51; a rotation stopping groove 52; a shaft rear end cap 53; a guide sleeve 54; an auxiliary internal gear 55; a spindle mounting hole 56; a pin shaft hole 57; a stopper rod 58; a second jump head 59; a stopper arm 60; a stop notch 61; a spindle spline 62; a cylindrical roller bayonet 63; a cylindrical roller detent spring 64; ratchet internal splines 65; a first ratchet tooth zone 66; a second ratchet tooth region 67; third ratchet tooth zone 68; a fourth ratchet tooth zone 69; a first rocker arm pocket area 70; a second rocker arm pocket area 71; a third rocker arm pocket area 72; a fourth rocker arm slot region 73; a push plate spline 74; a first inboard track 75; a second inboard track 76; a third inner side rail 77; a fourth inboard track 78; a cylindrical roller limiting groove 79; a first outboard track 80; a second outer rail 81; a third outboard track 82; a fourth outer rail 83; a slot bottom 84; an uphill slope 85; a first oil inlet hole 86; and a second oil inlet hole 87.

Detailed Description

Example 1

As shown in fig. 1 to 17, a cylindrical roller type torque wrench comprises a housing 18, a driving mechanism is arranged on the housing 18, a transmission mechanism and an actuating mechanism are arranged in the housing 18, the driving mechanism is connected with the actuating mechanism through the transmission mechanism, the actuating mechanism is provided with a rotating shaft 16, and one end of the rotating shaft 16 extends to the outer side of the housing 18;

the driving mechanism comprises an oil inlet assembly 24, and the oil inlet assembly 24 is connected with the transmission mechanism through a first oil inlet hole 86 and a second oil inlet hole 87;

the transmission mechanism comprises a cylinder body, a piston rod 13 is arranged in the cylinder body, and the piston rod 13 is connected with the actuating mechanism through a rocker 14;

the actuator is also provided with a ratchet wheel 17, the ratchet wheel 17 is positioned in the rocker arm 14, the ratchet wheel 17 comprises a cylindrical roller 15, and the ratchet wheel 17 is connected with the rotating shaft 16.

With the structure, the driving mechanism provides power for the transmission mechanism, so that the piston rod 13 can push the rocker arm 14 to rotate, the rocker arm 14 further drives the ratchet wheel 17 to rotate, the ratchet wheel 17 transmits torque to the rotating shaft 16, and the output end of the rotating shaft 16 performs bolt screwing action.

In the preferred scheme, equipartition ratchet internal spline 65 on ratchet 17 inner wall, a plurality of profile of tooth district of the outward flange evenly distributed of ratchet 17, a plurality of profile of tooth district end to end connection, the structure in profile of tooth district is: the first concave part is connected with the first convex part, the first concave part comprises a first ratchet tooth area 66 and a second ratchet tooth area 67, the first ratchet tooth area 66 is connected with the second ratchet tooth area 67, the first convex part is provided with a fourth ratchet tooth area 69, the first ratchet tooth area 66 and the second ratchet tooth area 67 are closer to the center of the ratchet wheel 17, the fourth ratchet tooth area 69 is farther from the center of the ratchet wheel 17, and a third ratchet tooth area 68 is further arranged between the second ratchet tooth area 67 and the fourth ratchet tooth area 69. With the structure, in the process of transmitting torque, the ratchet wheel 17 and the cylindrical rollers 15 uniformly distributed around the ratchet wheel transmit torque in a low-pair contact mode, so that the uniformity of stress and the stability of torque are ensured, in the process of transmitting torque, the first ratchet wheel tooth area 66 is mainly contacted with the cylindrical rollers 15 to bear load, in the process of returning, the cylindrical rollers 15 mainly generate sliding friction with the second ratchet wheel tooth area 67, the third ratchet wheel tooth area 68 and the fourth ratchet wheel tooth area 69, and the friction of the middle parts of the cylindrical rollers is avoided, so that the service life is prolonged.

In the preferred scheme, be equipped with a plurality of evenly distributed's joint district along the circumference in rocking arm 14 inboard, a plurality of joint district end to end connection, the structure of joint district is: the rocker arm structure comprises a second concave part and a second convex part, the second concave part is connected with the second convex part, the second concave part comprises a first rocker arm groove area 70 and a second rocker arm groove area 71, the second convex part comprises a fourth rocker arm groove area 73, the fourth rocker arm groove area 73 is closer to the center of the rocker arm 14, the first rocker arm groove area 70 and the second rocker arm groove area 71 are farther from the center of the rocker arm 14, and a third rocker arm groove area 72 is arranged between the second rocker arm groove area 71 and the fourth rocker arm groove area 73;

the cylindrical roller 15 is positioned between the notch and the concave part of the tooth-shaped area, the upper end of the rocker arm 14 is also provided with a pin shaft hole 57, and the pin shaft hole 57 is connected with the piston rod 13 through a pin shaft 44.

With this structure, the rocker 14 provides a limiting and supporting function for the cylindrical roller 15, and at the same time, the rocker 14 can be driven to rotate by the piston rod 13, the pin shaft hole 57 is used for transmitting torque, in the process of transmitting torque, the rocker arm 14 and the cylindrical rollers 15 uniformly distributed around the inner wall are transmitted in a low-pair contact mode, in the process of transmitting torque, the first rocker arm groove area 70 is in low-pair contact with the cylindrical rollers 15, in the return stroke process of the rocker arm 14, the second rocker arm groove area 71 is a space where the cylindrical rollers 15 expand outwards in the rising process of the third rocker arm groove area 72, in the return stroke process of the rocker arm, the plane of the third rocker arm groove area 72 acts on the cylindrical rollers 15 to enable the cylindrical rollers to rise and return, the fourth rocker arm groove area 73 serves as a transition area of the cylindrical rollers 15 in the return stroke, and the distance of the fourth rocker arm groove area 73 is long, so that the maximum torque which can be borne by the rocker arm is large enough.

In the preferred scheme, the cover is equipped with first push pedal 45 and second push pedal 46 on the pivot 16, and first push pedal 45 and second push pedal 46 set up respectively in 14 both sides of rocking arm relatively, are equipped with the draw-in groove on first push pedal 45 and the second push pedal 46 respectively, and the structure of draw-in groove is: the outer limiting part and the inner limiting part are oppositely arranged, a cylindrical roller limiting groove 79 is arranged between the outer limiting part and the inner limiting part, the outer limiting part comprises a first outer side rail 80, a second outer side rail 81, a third outer side rail 82 and a fourth outer side rail 83, the first outer side rail 80, the second outer side rail 81, the third outer side rail 82 and the fourth outer side rail 83 are respectively connected end to end, the first outer side rail 80, the second outer side rail 81, the third outer side rail 82 and the fourth outer side rail 83 are respectively matched with the first rocker arm groove area 70, the second rocker arm groove area 71, the third rocker arm groove area 72 and the fourth rocker arm groove area 73 in shape, the inner limiting part comprises a first inner side rail 75, a second inner side rail 76, a third inner side rail 77 and a fourth inner side rail 78, the first inner side rail 75, the second inner side rail 76, The third inner side track 77 and the fourth inner side track 78 are respectively connected end to end, the shapes of the first inner side track 75, the second inner side track 76, the third inner side track 77 and the fourth inner side track 78 are respectively matched with the first ratchet tooth area 66, the second ratchet tooth area 67, the third ratchet tooth area 68 and the fourth ratchet tooth area 69, the cylindrical roller limiting groove 79 comprises a groove bottom 84 and an ascending slope 85, and the groove bottom 84 is connected with the ascending slope 85;

a plurality of stop notches 61 are uniformly formed on the outer side of the first push plate 45 and the outer side of the second push plate 46 along the circumferential direction respectively.

The middle of the rotating shaft is also sleeved with an auxiliary internal gear 55, so that the ratchet 17, the first push plate 45, the second push plate 46 and the auxiliary internal gear 55 are matched together to transmit torque to the rotating shaft 16. With the structure, the first push plate 45 and the second push plate 46 respectively provide support and limit for two ends of the cylindrical roller 15, and simultaneously play a role in guiding the cylindrical roller 15, so that the cylindrical roller 15 is guided to move along the track of the clamping groove under the rotation of the rocker arm 14.

In the preferred scheme, the both ends of cylindrical roller 15 support and lean on respectively in the draw-in groove of first push pedal 45 and second push pedal 46, and the profile of tooth district and joint district are run through at the both ends of cylindrical roller 15, and the both ends of cylindrical roller 15 are equipped with the cylinder hole respectively, are equipped with cylindrical roller bayonet lock spring 64 in the cylinder hole, are equipped with cylindrical roller bayonet lock 65 on the cylindrical roller bayonet lock spring 64, and cylindrical roller bayonet lock 65 is at the downthehole spring axis reciprocating motion that follows of cylinder. With the structure, when the cylindrical roller 15 rotates under the rocker arm 14, the cylindrical roller bayonet pin 65 extrudes the cylindrical roller bayonet pin spring 64, the cylindrical roller 15 moves along the upward slope 85 from the groove bottom 84, and circumferential circulation is performed in sequence, and meanwhile, the groove bottom 84 can play a role in limiting and fixing the cylindrical roller bayonet pin 65.

In a preferred embodiment, the oil inlet assembly 24 includes a second joint 19, a first joint 8 and an oil inlet valve seat 10, which are oppositely disposed, the second joint 19 is connected to the first joint 8 in a snap-fit manner, the second joint 19 and the first joint 8 are respectively provided with an oil inlet 32, one end of the oil inlet 32 is connected to an oil guide hole 33, one side of the oil guide hole 33 away from the oil inlet 32 is provided with an oil guide groove 26, the oil inlet valve seat 10 is of a hollow structure, two sides of the oil inlet valve seat 10 are symmetrically provided with a supporting shaft, the supporting shaft is provided with an oil guide channel 27, the middle of the supporting shaft is provided with a pressure relief opening 28, the oil guide channel 27 is connected to the pressure relief opening 28, the second joint 19 and the first joint 8 are respectively rotatably connected to two supporting shafts, the oil inlet valve seat 10 includes a first oil guide ring groove 36 and a second oil guide ring groove 37, the second oil guide ring groove 37 is located, The second oil inlet valve seat oil guiding hole 34 is connected with the first oil guiding ring groove 36 and the second oil guiding ring groove 37, the oil guiding core 7 penetrates through the middle of the oil inlet valve seat 10, the oil inlet valve seat 10 is provided with an oil inlet sealing cover 9, and the oil inlet sealing cover 9 is connected with the oil guiding core 7 through screws. One end of the shell 18 is provided with a hydraulic cylinder, and the oil inlet assembly 24 leads high-pressure oil to pass through the first oil inlet hole 86; the second oil inlet holes 87 are filled into respective hydraulic cylinder cavities, the pistons 5 in the hydraulic cylinder cavities are subjected to the action of high-pressure oil to do reciprocating linear motion along the axis of the cylinder bodies, the pistons 5 adopt a variable clearance sealing technology, two variable clearance sealing grooves 47 are arranged on two sides of the pistons 5, when the hydraulic pressure of the rodless cavity is high, the hydraulic pressure acts on the variable clearance sealing groove 47 on one side of the rodless cavity, so that the variable clearance sealing groove 47 is expanded, and the minimum clearance between the pistons 5 and the wall surfaces of the hydraulic cylinders is reduced; when the hydraulic pressure of the rod cavity is high, the hydraulic pressure acts on the variable-gap sealing groove 47 on one side of the rod cavity, so that the variable-gap sealing groove 47 is enlarged, the minimum gap between the piston 5 and the wall surface of the hydraulic cylinder is reduced, one end of the piston 5 is in threaded connection with the limiting sliding sleeve 12, the piston rod 13 is clamped between the limiting sliding sleeve 12 and the piston 5, when the hydraulic oil acts on the piston 5, the piston 5 moves synchronously with the limiting sliding sleeve 12 and the piston rod 13, the limiting sliding sleeve 12 and the piston 5 adopt a ball hinge mode, the linear motion of the piston rod 13 can be driven, meanwhile, the rotation of the piston rod 13 is not limited, and the linear motion of the piston 5 can be converted into.

The oil inlet hole sealing cover 9 is connected with the oil guide core 7 through a screw so as to limit the axial movement of the oil inlet valve seat 10, the interface sealing rings 25 are installed on two sides of the oil guide groove 26, and the oil guide core sealing rings 35 are installed on two sides of the first oil guide ring groove 36 and the second oil guide ring groove 37. By the structure, the oil inlet assembly 24 is located at the position obliquely above the shell 18, a rodless hydraulic cavity with large hydraulic pressure is avoided, the oil inlet assembly 24 integrates two oil inlet lines into one oil delivery port, hydraulic oil finally enters the first oil inlet hole 86 and the second oil inlet hole 87 of the oil guide core 7 through the oil inlet assembly 24, the first connector 8 and the second connector 19 can rotate on the oil inlet valve seat 10, and the oil inlet valve seat 10 can rotate on the oil guide core 7, so that the oil inlet direction is not limited, and the use is flexible and convenient.

In a preferred scheme, the stopper further comprises a stopping rod 58, the two ends of the stopping rod 58 are respectively provided with a first jump head 23 and a second jump head 59, the middle part of the stopping rod 58 is provided with two stopping arms 60, the two stopping arms 60 are respectively arranged at the two sides of the rocker arm 14, the two stopping arms 60 respectively abut against stopping notches 61 of the first push plate 45 and the second push plate 46, and the first jump head 23 and the second jump head 59 are respectively positioned in fixing grooves 50 on the shell 18. In the return process of the rocker arm 14, the stop arms 60 respectively abut against the stop notches 61 of the first push plate 45 and the second push plate 46, the casing 18 on one side of the fixed groove 50 is provided with a stop groove 52, two stop holes 51 are symmetrically arranged in the stop groove 52, the directions of the stop holes 51 respectively correspond to the two stop arms 60, the upper end of the fixed groove 50 is further provided with a sealing threaded hole 20, a sealing screw 22 is arranged in the sealing threaded hole 20, and the sealing screw 22 is used for sealing the casing 18. With this structure, the position of the stopper arm 60 can be adjusted by the rotation stop hole 51, and the stopper function can be achieved. In addition, the pin shaft 40 can be placed in the pin shaft hole 57 through the threaded hole 20 to facilitate assembly.

In a preferable scheme, the upper end of the oil guide core 7 is provided with a threaded hole 31, the middle of the oil inlet seal cover 9 is provided with a through hole, the through hole is positioned right above the threaded hole 31, the through hole is coaxial with the threaded hole 31, the oil guide core 7 and the oil inlet seal cover 9 are respectively provided with a limiting hole 40, the two limiting holes 40 are oppositely arranged, and the lower part of the oil guide core 7 is also oppositely provided with a first oil guide hole 38 and a second oil guide hole 39. One end of the oil guide core 7 is connected above the shell 18, the oil guide core 7 is sleeved on the oil inlet valve seat 10, an oil inlet valve seat 10 is fixed on the outer side of the oil guide core 7 through an oil inlet end cover 9 and an oil inlet gasket 11, the oil inlet valve seat 10 can rotate along the axial direction of the oil guide core 7, cylindrical support shafts are arranged on two sides of the oil inlet valve seat 10, a second interface 19 and a first interface 8 can be connected with the support shafts in a rotatable mode, the second interface 19 and the first interface 8 are connected in a buckling mode and fixed in the middle through screws in threaded holes 30, high-pressure oil enters an oil guide hole 33 through an oil inlet 32 and finally is injected into an oil guide channel 27 of the oil inlet valve seat 10 together with an oil guide groove 26 and flows out of a pressure relief hole 28, the oil enters a first oil guide ring groove 36 and a second oil guide ring groove 37 through a first oil inlet valve seat oil guide hole 29 and a second oil inlet valve seat oil guide hole 34 respectively, and finally enters a first oil guide hole 38 of the oil guide core 7 respectively; the second oil guide holes 39 flow out and finally enter the respective hydraulic cylinder cavities. With this structure, the piston 5 can be pushed to reciprocate in the piston cavity by alternately injecting high-pressure oil into the second port 19 and the first port 8.

In a preferable scheme, two ends of the rotating shaft 16 are respectively sleeved with a guide sleeve 54, one side of the guide sleeve 54 far away from the output end of the rotating shaft 16 is provided with a rotating shaft rear end cover 53, the rotating shaft rear end cover 53 is in threaded connection with the rotating shaft 16, one side of the guide sleeve 54 close to the output end of the rotating shaft 16 is provided with a rotating shaft front end cover 21, and the rotating shaft front end cover 21 is in threaded connection with the rotating shaft 16. The output end of the rotating shaft 16 can be matched with various types of sleeves for screwing, so that the structure is that the guide sleeve 54 is made of high-wear-resistance materials, the guide sleeve 54 is installed on the outer side of the auxiliary internal gear 55 and matched with the stepped groove in the position of the rotating shaft installation hole 56 in the shell 18, the axial displacement of the ratchet wheel 17 can be limited, and the rotating shaft front end cover 21 and the rotating shaft rear end cover 53 can play a role in sealing the connection position of the rotating shaft 16 and the shell.

In the preferred scheme, piston rod 13 is articulated with piston 5 through spacing sliding sleeve 43, piston rod 13 cunning is located in the pneumatic cylinder body, pneumatic cylinder one end is equipped with lid 6 behind the pneumatic cylinder, lid 6 and the 18 threaded connection of casing behind the pneumatic cylinder, 18 one end of casing is equipped with reaction arm connecting spline 49, reaction arm connecting spline 49's terminal surface is equipped with spacing hole 48 of reaction arm, still be equipped with reaction arm 2, reaction arm 2 is located casing 18 one side, be equipped with in the middle of the reaction arm 2 and connect spline 49 assorted spread groove with reaction arm, reaction arm 2 is connected with casing 18 through reaction arm bayonet socket 3 and reaction arm eave tile 4. And a piston sealing ring 42 is installed on one side of the piston 5 and used for ensuring the sealing between the piston 5 and the inner wall of the hydraulic cylinder when the piston 5 moves, and an oil cylinder rear cover sealing ring 41 is installed on one side of the hydraulic cylinder rear cover 6, so that the sealing effect in the cylinder is ensured to be good, and the pressure is stable. Can be according to the needs that use, the angle between adjustment reaction arm 2 and the casing 18, the spread groove and the reaction arm of reaction arm 2 connect spline 49 intermeshing, the circumferential direction of restriction reaction arm 2 removes, install the staple in the spacing hole 48 of reaction arm, the axial displacement of restriction reaction arm 2 guarantees the contact of reaction arm protective sheath 1 of reaction arm 2 lower extreme and atress, so that reaction arm 2 can play the fixed effect of support to casing 18, reaction arm protective sheath 1 adopts wear-resistant material to make. By the structure, the reaction arm 2 is connected with the shell 18 through splines, so that circumferential displacement of the shell 18 is limited, the reaction arm clamping pin seat 3 and the reaction arm hook head 4 limit axial displacement of the shell 18, and the limiting sliding sleeve 43 can ensure stable contact of ball hinge joint.

Example 2

The working principle is as follows: during the advancing process of the piston 5, the piston 5 pushes the piston rod 13, the piston rod 13 pushes the rocker arm 14 to rotate, the rocker arm 14 drives the cylindrical roller to move 15 to rotate through the notch, the cylindrical roller 15 is in low-pair contact with the tooth-shaped part on the outer edge of the ratchet wheel 17, so that the ratchet wheel 17 is driven to rotate, and the ratchet wheel 17 drives the rotating shaft 16 to rotate through the rotating shaft spline 62.

In the process of returning to advancing of the rocker arm 14, the cylindrical roller 15, the first rocker arm groove area 70 and the first ratchet tooth area 66 of the rocker arm 14 are in a low-pair contact state in the first stage, the cylindrical roller bayonet lock spring 64 of the cylindrical roller 15 is also in an outward rubbing state, the cylindrical roller bayonet lock 63 of the cylindrical roller 15 abuts against the bottom 84 of the cylindrical roller limiting groove, and the two stop arms 60 of the stopper respectively abut against the stop grooves 61 of the first push plate 45 and the second push plate 46 to limit the first push plate 45; the rotation of the second push plate 46, due to the first push plate 45; the second push plate 46 is connected with the rotating shaft 16 through splines, so that the first push plate 45 and the second push plate 46 are limited, namely, the rotary motion of the rotating shaft 16 is limited, the rotating shaft 16 is connected with the ratchet wheel 17 through splines, and the rotary motion of the rotating shaft 16 is limited, namely, the rotary motion of the ratchet wheel 17 is limited; the ratchet 17, the first push plate 45 and the second push plate 46 do not perform a pivotal motion during the return stroke of the rocker arm 14.

The first step of the return stroke of the rocker arm 14 is that the rocker arm 14 starts to rotate, the first rocker arm groove area 70 of the rocker arm 14 is disengaged from the surface of the cylindrical roller 15, or the first rocker arm groove area 70 of the rocker arm 14 is not sufficiently disengaged from the surface of the cylindrical roller 15 due to gravity, the surface of the cylindrical roller 15 is disengaged from the first ratchet tooth area 66 of the ratchet 17, the cylindrical roller bayonet spring 64 of the cylindrical roller 15 is in an outwards-rubbing state, the cylindrical roller bayonet 63 of the cylindrical roller 15 abuts against the cylindrical roller limiting groove bottom 84, because the first push plate 45 and the second push plate 46 are provided with a double-layer limiting groove structure of an external limiting part and an internal limiting part, the cylindrical roller 15 is limited in the range of the cylindrical roller bayonet limiting groove bottom 84, and the surface of the cylindrical roller 15 mainly contacts with the second inner side rail 76 and the fourth outer side rail 83 of the first push plate 45 and the second push plate 46 in a friction manner, and does not contact with the second ratchet tooth area 67 of the, this reduces wear on the outer surface of the ratchet 17 and the surface of the middle section of the cylindrical roller 15, thereby extending the life of the hydraulic torque wrench.

In the second return stroke of the rocker arm 14, the rocker arm 14 continues to rotate, the cylindrical roller 15 is in contact with the third rocker arm groove area 72 of the rocker arm 14, so that the rocker arm 14 pushes the cylindrical roller 15 to rotate together, the cylindrical roller bayonet lock spring 64 of the cylindrical roller 15 is in an external friction state, and the cylindrical roller bayonet lock 63 of the cylindrical roller 15 abuts against the bottom 84 of the cylindrical roller limiting groove; the cylindrical roller 15 is restricted within the range of the groove bottom 84 of the cylindrical roller pin limiting groove, and the surface of the cylindrical roller 15 is mainly in frictional contact with the second inner side rail 76 and the fourth outer side rail 83 of the first push plate 45 and the second push plate 46 and is not in contact with the second ratchet tooth area 67 of the ratchet 17, so that the abrasion of the outer surface of the ratchet 17 and the surface of the middle section of the cylindrical roller 15 can be reduced, and the service life of the hydraulic torque wrench can be prolonged.

In the third step of returning the rocker arm 14, the rocker arm 14 continues to rotate, the cylindrical roller 15 is in contact with the third rocker arm groove area 72 of the rocker arm 14, the rocker arm 14 pushes the cylindrical roller 15 to rotate together, and at the moment, the cylindrical roller 15 starts to enter a climbing stage under the pushing of the third rocker arm groove area 72; the cylindrical roller 15 is positioned in the third ratchet tooth area 68 of the ratchet 17, the second rocker groove area 71 of the rocker 14, the cylindrical roller limiting groove upslope 85, the third inner side track 77 and the third outer side track 82 of the first push plate 45 and the second push plate 46, the cylindrical roller bayonet lock spring 64 of the cylindrical roller 15 is in a semi-externally-open state, and the cylindrical roller bayonet lock 63 of the cylindrical roller 15 abuts against the cylindrical roller limiting groove upslope 85 and moves towards the cylindrical roller limiting groove upslope 85 along with the rotation of the rocker 14; the cylindrical rollers 15 are mainly in frictional contact with the third inner tracks 77 and the third outer tracks 82 of the first push plate 45 and the second push plate 46, and are not in contact with the third ratchet tooth regions 68 of the ratchet 17, so that the wear of the outer surface of the ratchet 17 and the surface of the middle section of the cylindrical rollers 15 can be reduced, thereby prolonging the life of the hydraulic torque wrench.

The rocker arm 14 returns for the fourth step, the rocker arm 14 continues to rotate, the cylindrical roller 15 is pushed by the third rocker arm groove area 72 of the rocker arm 14, so that the cylindrical roller 15 is positioned in the fourth ratchet tooth area 69 of the ratchet 17, the second rocker arm groove area 71 of the rocker arm 14, the fourth inner side track 78 and the second outer side track 81 of the first push plate 45 and the second push plate 46, and is separated from the cylindrical roller limiting groove 79, at this time, the cylindrical roller 15 cannot contact with the third rocker arm groove area 72 of the rocker arm 14 due to gravity, the cylindrical roller 15 is positioned in the range of the fourth ratchet tooth area 69 of the ratchet 17, the cylindrical roller pin spring 64 of the cylindrical roller 15 is in a compressed state, the cylindrical roller pin 63 of the cylindrical roller 15 abuts against the first layer groove bottoms of the first push plate 45 and the second push plate 46, the cylindrical roller 15 mainly contacts with the fourth inner side track 78 and the second outer side track 81 of the first push plate 45 and the second push plate 46 in a friction manner, there is no contact with the fourth ratchet tooth zone 69 of the ratchet 17, which reduces wear on the outer surface of the ratchet 17 and the surface of the middle section of the cylindrical roller 15, thereby extending the life of the hydraulic torque wrench.

The rocker arm 14 returns for the fifth step, the rocker arm 14 continues to rotate, the cylindrical roller 15 is pushed by the third rocker arm groove area 72 of the rocker arm 14, so that the cylindrical roller 15 is positioned in the first ratchet tooth area 66 of the ratchet 17, the second inner side track 76 and the fourth outer side track 83 of the first push plate 45 and the second push plate 46, under the action of the first outer side track 80 of the first push plate 45 and the second push plate 46, exits the second rocker arm groove area 71 of the rocker arm 14, and reenters the bottom 79 of the cylindrical roller limiting groove, at this time, the cylindrical roller 15 cannot contact with the third rocker arm groove area 72 of the rocker arm 14 due to gravity, the cylindrical roller 15 is positioned in the range of the second ratchet tooth area 67 of the ratchet 17, the cylindrical roller spring 64 of the cylindrical roller 15 is in an outer rubbing state, the cylindrical roller bayonet 63 of the cylindrical roller 15 abuts against the bottom 79 of the cylindrical roller limiting groove, the cylindrical roller 15 is limited in the range of the bottom 79 of the cylindrical roller bayonet limiting groove, the surface of the cylindrical roller 15 is mainly in frictional contact with the second inner tracks 76 and the fourth outer tracks 83 of the first push plate 45 and the second push plate 46, and is not in contact with the second ratchet tooth area 67 of the ratchet 17, so that the abrasion of the outer surface of the ratchet 17 and the surface of the middle section of the cylindrical roller 15 can be reduced, and the service life of the hydraulic torque wrench can be prolonged.

The rocker 14 returns for the sixth step, the rocker 14 starts to advance, and the cylindrical roller 15 is pushed by the first rocker groove area 70 of the rocker 14, so that the cylindrical roller 15 is gradually in a low-pair contact state with the first rocker groove area 70 of the rocker 14 and the first ratchet tooth area 66 of the ratchet 17; at this time, the stop arm 60 of the stopper is gradually separated from the stop grooves of the first push plate 45 and the second push plate 46, the cylindrical roller bayonet spring 64 of the cylindrical roller 15 is in an external rubbing state, the cylindrical roller bayonet 63 of the cylindrical roller 15 abuts against the bottom 79 of the cylindrical roller limiting groove, when the cylindrical roller 15 is in a low-secondary contact state with the first rocker groove area 70 of the rocker 14 and the first ratchet tooth area 66 of the ratchet 17, the fully-pushed state is entered, and at this time, the outer surface of the cylindrical roller 15 is in a low-secondary contact state with the first rocker groove area 70 of the rocker 14 and the first ratchet tooth area 66 of the ratchet 17, is in a separated state from the first inner side rail 75 and the first outer side rail 80 of the first push plate 45 and the second push plate 46, because of the large pressure, it is necessary to have the surface of the cylindrical roller 15 in low-order contact with both the first rocker groove region 70 of the rocker 14 and the first ratchet tooth region 66 of the ratchet 17.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (9)

1. A cylindrical roller type torque wrench is characterized in that: the device comprises a shell (18), wherein a driving mechanism is arranged on the shell (18), a transmission mechanism and an executing mechanism are arranged in the shell (18), the driving mechanism is connected with the executing mechanism through the transmission mechanism, the executing mechanism is provided with a rotating shaft (16), and one end of the rotating shaft (16) extends to the outer side of the shell (18);

the driving mechanism comprises an oil inlet assembly (24), and the oil inlet assembly (24) is connected with the transmission mechanism through a first oil inlet hole (86) and a second oil inlet hole (87);

the transmission mechanism comprises a cylinder body, a piston rod (13) is arranged in the cylinder body, and the piston rod (13) is connected with the actuating mechanism through a rocker arm (14);

the actuating mechanism is also provided with a ratchet wheel (17), the ratchet wheel (17) is positioned in the rocker arm (14), the ratchet wheel (17) comprises a cylindrical roller (15), and the ratchet wheel (17) is connected with the rotating shaft (16).

2. A cylindrical roller type torque wrench as claimed in claim 1, wherein: at ratchet (17) inner wall on equipartition ratchet internal spline (65), a plurality of profile of tooth district of the outward flange evenly distributed of ratchet (17), a plurality of profile of tooth district end to end connection, the structure in profile of tooth district is: including first concave part and first convex part, first concave part and first convex part are connected, first concave part includes first ratchet tooth district (66) and second ratchet tooth district (67), first ratchet tooth district (66) and second ratchet tooth district (67) are connected, fourth ratchet tooth district (69) are established to first convex part, first ratchet tooth district (66) and second ratchet tooth district (67) are nearer apart from ratchet (17) center, fourth ratchet tooth district (69) are far away from ratchet (17) center, still be equipped with third ratchet tooth district (68) between second ratchet tooth district (67) and fourth ratchet tooth district (69).

3. A cylindrical roller type torque wrench as claimed in claim 1, wherein: be equipped with a plurality of evenly distributed's joint district along the circumference in rocking arm (14) inboard, a plurality of joint district end to end connection, the structure of joint district is: the rocker arm structure comprises a second concave part and a second convex part, the second concave part is connected with the second convex part, the second concave part comprises a first rocker arm groove area (70) and a second rocker arm groove area (71), the second convex part comprises a fourth rocker arm groove area (73), the fourth rocker arm groove area (73) is close to the center of a rocker arm (14), the first rocker arm groove area (70) and the second rocker arm groove area (71) are far away from the center of the rocker arm (14), and a third rocker arm groove area (72) is further arranged between the second rocker arm groove area (71) and the fourth rocker arm groove area (73);

the cylindrical roller (15) is positioned between the notch and the concave part of the tooth-shaped area, the upper end of the rocker arm (14) is also provided with a pin shaft hole (57), and the pin shaft hole (57) is connected with the piston rod (13) through a pin shaft (44).

4. A cylindrical roller type torque wrench as claimed in claim 1, wherein: the cover is equipped with first push pedal (45) and second push pedal (46) on pivot (16), and first push pedal (45) and second push pedal (46) set up relatively respectively in rocking arm (14) both sides, are equipped with the draw-in groove on first push pedal (45) and second push pedal (46) respectively, and the structure of draw-in groove is: including along a plurality of outer spacing portions and a plurality of interior spacing portions of circumference evenly distributed, outer spacing portion and interior spacing portion set up relatively, be equipped with cylindrical roller spacing groove (79) between outer spacing portion and the interior spacing portion, outer spacing portion includes first outside track (80), second outside track (81), third outside track (82) and fourth outside track (83), first outside track (80), second outside track (81), third outside track (82) and fourth outside track (83) are end to end connection respectively, first outside track (80), second outside track (81), third outside track (82) and fourth outside track (83) appearance respectively with first rocking arm groove area (70), second rocking arm groove area (71), third rocking arm groove area (72) and fourth rocking arm groove area (73) phase-match, interior spacing portion includes first inside track (75), The first inner side rail (75), the second inner side rail (76), the third inner side rail (77) and the fourth inner side rail (78) are respectively connected end to end, the shapes of the first inner side rail (75), the second inner side rail (76), the third inner side rail (77) and the fourth inner side rail (78) are respectively matched with the first ratchet tooth area (66), the second ratchet tooth area (67), the third ratchet tooth area (68) and the fourth ratchet tooth area (69), the cylindrical roller limiting groove (79) comprises a groove bottom (84) and an ascending slope (85), and the groove bottom (84) is connected with the ascending slope (85);

a plurality of stop notches (61) are uniformly arranged on the outer side of the first push plate (45) and the outer side of the second push plate (46) along the circumferential direction respectively.

5. A cylindrical roller type torque wrench as claimed in claim 1, wherein: the two ends of the cylindrical roller (15) are respectively abutted against the clamping grooves of the first push plate (45) and the second push plate (46), the two ends of the cylindrical roller (15) penetrate through the tooth-shaped area and the clamping area, the two ends of the cylindrical roller (15) are respectively provided with a cylindrical hole, a cylindrical roller clamping pin spring (64) is arranged in the cylindrical hole, a cylindrical roller clamping pin (63) is arranged on the cylindrical roller clamping pin spring (64), and the cylindrical roller clamping pin (63) reciprocates in the cylindrical hole along the spring axis.

6. A cylindrical roller type torque wrench as claimed in claim 1, wherein: the oil inlet assembly (24) comprises a second joint (19), a first joint (8) and an oil inlet valve seat (10) which are arranged oppositely, the second joint (19) is connected with the first joint (8) in a buckling mode, the second joint (19) and the first joint (8) are respectively provided with an oil inlet (32), one end of the oil inlet (32) is connected with an oil guide hole (33), one side, far away from the oil inlet (32), of the oil guide hole (33) is provided with an oil guide groove (26), the oil inlet valve seat (10) is of a hollow structure, supporting shafts are symmetrically arranged on two sides of the oil inlet valve seat (10), oil guide channels (27) are arranged on the supporting shafts, a pressure relief opening (28) is formed in the middle of each supporting shaft, the oil guide channels (27) are connected with the pressure relief opening (28), the second joint (19) and the first joint supporting shafts (8) are respectively connected with the two sides in a rotatable mode, the oil inlet valve, the second oil guide ring groove (37) is positioned above the first oil guide ring groove (36), the pressure relief ports (28) at two sides are respectively connected with the first oil guide ring groove (36) and the second oil guide ring groove (37) through the first oil inlet valve seat oil guide hole (29), the second oil inlet valve seat oil guide hole (34), the oil guide core (7) penetrates through the middle of the oil inlet valve seat (10), the oil inlet sealing cover (9) is arranged on the oil inlet valve seat (10), and the oil inlet sealing cover (9) is connected with the oil guide core (7) through screws.

7. A cylindrical roller type torque wrench as claimed in claim 1, wherein: the anti-theft device is characterized by further comprising a stopper, the stopper comprises a stopping rod (58), a first jumping head (23) and a second jumping head (59) are arranged at two ends of the stopping rod (58) respectively, two stopping arms (60) are arranged in the middle of the stopping rod (58), the two stopping arms (60) are arranged on two sides of the rocker arm (14) respectively, the two stopping arms (60) abut against stopping notches (61) of the first push plate (45) and the second push plate (46) respectively, and the first jumping head (23) and the second jumping head (59) are located in fixing grooves (50) in the shell (18) respectively.

8. A cylindrical roller type torque wrench as claimed in claim 6, wherein: the oil guide core is characterized in that a threaded hole (31) is formed in the upper end of the oil guide core (7), a through hole is formed in the middle of the oil inlet sealing cover (9), the through hole is located right above the threaded hole (31), the through hole and the threaded hole (31) are coaxial, limiting holes (40) are respectively formed in the oil guide core (7) and the oil inlet sealing cover (9), the two limiting holes (40) are arranged oppositely, and a first oil guide hole (38) and a second oil guide hole (39) are further formed in the lower portion of the oil guide core (7) oppositely.

9. A cylindrical roller type torque wrench as claimed in claim 1, wherein: piston rod (13) are articulated through spacing sliding sleeve (12) and piston (5), piston rod (13) cunning is located in the pneumatic cylinder body, pneumatic cylinder one end is equipped with lid (6) behind the pneumatic cylinder, lid (6) and casing (18) threaded connection behind the pneumatic cylinder, casing (18) one end is equipped with reaction arm connecting spline (49), the terminal surface of reaction arm connecting spline (49) is equipped with spacing hole of reaction arm (48), still be equipped with reaction arm (2), reaction arm (2) are located casing (18) one side, be equipped with in the middle of the reaction arm (2) and connect spline (49) assorted spread groove with reaction arm, reaction arm passes through reaction arm bayonet socket (3) and reaction arm eave tile (4) and is connected with casing (18).

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