CN107775577B - Ratchet torque spanner - Google Patents
Ratchet torque spanner Download PDFInfo
- Publication number
- CN107775577B CN107775577B CN201711293821.9A CN201711293821A CN107775577B CN 107775577 B CN107775577 B CN 107775577B CN 201711293821 A CN201711293821 A CN 201711293821A CN 107775577 B CN107775577 B CN 107775577B
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- China
- Prior art keywords
- swing arm
- stop lever
- groove
- cover plate
- sleeve
- Prior art date
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- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
- B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
- B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
- B25B13/463—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention provides a ratchet torque wrench, which belongs to the field of wrenches, and comprises the following steps: a handle with an inner gear ring at one end; the sleeve is rotationally arranged in the annular gear, and a brake rack is arranged on the outer side surface of the sleeve; the swing arm is arranged outside the sleeve and at the inner side and provided with a torsion groove, and is respectively clamped with the annular gear and the brake rack; the stop lever is penetrated in the torsion groove and used for preventing the swing arm from swinging along the screwing direction; the cover plate is used for pushing the stop lever to slide along the torsion groove; and the locking mechanism is connected between the annular gear and the cover plate and used for fixing the annular gear and the cover plate when the stop lever prevents the swing arm from swinging along the screwing direction. When the handle of the ratchet torque wrench rotates, the swing arm swings, the free end of the swing arm is separated from the annular gear or the brake rack, and the handle and the sleeve relatively rotate; when the handle is screwed, the swing arm is clamped, so that the handle is clamped and fixed with the sleeve, and the technical problem that the spanner is separated from the screw and clamped for a plurality of times during use, so that the operation efficiency of an operator is affected is avoided.
Description
Technical Field
The invention belongs to the technical field of wrenches, and particularly relates to a ratchet torque wrench.
Background
The wrench has wide application in the field of fastening operation, and the working head of the common wrench is of a fixed structure. Because the rotation angle of the hand is limited, when the screw is screwed by adopting the common spanner, the spanner is required to be separated from the screw after the common spanner is screwed for a certain angle, then the angle of the hand is restored, and then the next screwing is performed. When the common spanner is used, the spanner and the screw are required to be clamped and separated for a plurality of times, and the operation efficiency of an operator is greatly affected.
Disclosure of Invention
The invention aims to provide a ratchet torque wrench, which solves the technical problem that when an ordinary wrench is used in the prior art, the wrench is required to be separated from a screw and clamped for a plurality of times, and the working efficiency of an operator is greatly influenced.
In order to achieve the above purpose, the invention adopts the following technical scheme: provided is a ratchet torque wrench including:
a handle with an inner gear ring at one end;
the sleeve is rotationally arranged in the annular gear and is used for being clamped with the bolt, and a brake rack is arranged on the outer side face of the sleeve;
the swing arm is arranged outside the sleeve and positioned at the inner side of the annular gear, a torsion groove is formed in the swing arm, and two free ends of the swing arm are respectively clamped with the annular gear and the brake rack;
the stop lever is penetrated in the torsion groove and used for preventing the swing arm from swinging along the screwing direction;
a cover plate for pushing the stop lever to slide along the torsion groove; and
the locking mechanism is connected between the annular gear and the cover plate and used for fixing the annular gear and the cover plate when the stop lever prevents the swing arm from swinging along the screwing direction.
Further, the torsion groove comprises a circular arc-shaped first sliding section coaxially arranged with the swing arm, a circular arc-shaped second sliding section coaxially arranged with the swing arm, and a circular arc-shaped torque section communicated between the first sliding section and the second sliding section; in the radial direction of the first sliding section, the torque section protrudes out of the circumference where the first sliding section is located.
Further, a gear shifting groove is formed in the cover plate; the gear shifting groove comprises an arc-shaped stop lever chute coaxially arranged with the swing arm and a pressure groove communicated with the stop lever chute; the pressure groove is arranged along the radial direction of the stop lever chute, and the torque section is used for pushing the stop lever to slide along the pressure groove.
Further, the side walls at the two ends and the middle part of the stop lever chute are respectively provided with a limiting mechanism for limiting the stop lever at the two ends of the stop lever chute and at the position corresponding to the opening of the pressure groove in the stop lever chute.
Further, the limiting mechanism comprises a second accommodating hole arranged on the side wall of the gear shifting groove, a spring arranged in the second accommodating hole and a clamping head; in a free state, the head of the chuck protrudes out of the wall surface of the gear shifting groove.
Further, the pressure groove is provided with a pushing structure for pushing the stop lever to the stop lever sliding groove along the pressure groove.
Further, the ejector structure includes: the pressure groove is provided with a first accommodating hole and an ejector spring, wherein the first accommodating hole is formed in the side wall of one end, close to the rotation axis of the cover plate, of the pressure groove, and the ejector spring is arranged in the first accommodating hole and the pressure groove.
Further, the swing arm includes first pendulum block, first pendulum block is equipped with and is used for making the sleeve pipe passes the through-hole, a free end of first pendulum block be equipped with be used for with the first sharp tooth of ring gear block, the inboard of through-hole be equipped with be used for with the first rack of braking rack block's arc.
Further, the swing arm comprises a second swing block, one free end of the second swing block is provided with an arc-shaped second rack used for being clamped with the inner gear ring in a second sharp tooth mode, and the other free end of the second swing block is provided with an arc-shaped second rack used for being clamped with the brake rack.
Further, the locking mechanism comprises a clamping groove arranged at the outer edge of the cover plate and a clamping plate hinged to the inner gear ring and used for being clamped with the clamping groove.
The ratchet torque wrench provided by the invention has the beneficial effects that: compared with the prior art, the ratchet torque wrench disclosed by the invention has the advantages that after the cover plate pushes the stop lever to be clamped at one end of the torsion groove, the cover plate and the annular gear are locked and fixed by the locking mechanism, the position of the stop lever is fixed, and the swing arm is limited to swing in one direction only. When the handle rotates in the rotation direction, the swing arm swings in the rotation direction, so that the free end of the swing arm is separated from the annular gear or the brake rack, and the torque of the handle is not transmitted to the sleeve; when the handle rotates in the screwing direction, the swing arm is clamped between the ring gear and the sleeve by the stop lever, so that the torque of the handle is transmitted to the sleeve. When the ratchet torque wrench is used, torque is only transmitted in the screwing direction, and torque is not transmitted in the rotation direction, so that the technical problem that the wrench is separated from a screw and clamped for a plurality of times during use, and the operation efficiency of an operator is affected is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic exploded view of a first embodiment of a ratchet torque wrench according to the present invention;
FIG. 2 is a top view of a first embodiment of the ratchet torque wrench of the present invention;
FIG. 3 is a top view of the first embodiment of the ratchet torque wrench of the present invention with the cover plate removed;
FIG. 4 is a partial cross-sectional view of a cover plate of a first embodiment of the ratchet torque wrench of the present invention;
FIG. 5 is an enlarged view at A of FIG. 4;
FIG. 6 is a top view of a first pendulum mass of a first embodiment of the ratchet torque wrench of the present invention;
FIG. 7 is a bottom view of FIG. 6;
FIG. 8 is a top view of the first embodiment of the ratchet torque wrench of the present invention with the cover plate in the first gear position;
FIG. 9 is a top view of the first embodiment of the ratchet torque wrench of the present invention with the cover plate in the second gear;
FIG. 10 is a top view of the first embodiment of the ratchet torque wrench of the present invention with the bar in the torque section;
FIG. 11 is an exploded view of a second embodiment of the ratchet torque wrench of the present invention;
FIG. 12 is a top view of a second embodiment of a ratchet torque wrench according to the present invention
FIG. 13 is a top view of a second embodiment of the ratchet torque wrench of the present invention with the cover plate removed;
FIG. 14 is a top view of a cover plate of a second embodiment of the ratchet torque wrench of the present invention;
FIG. 15 is a top view of a second embodiment of the ratchet torque wrench of the present invention with the cover plate in a first gear position;
FIG. 16 is a top view of a second embodiment of the ratchet torque wrench of the present invention with the cover plate in a second gear;
FIG. 17 is a top view of a second embodiment of the ratchet torque wrench of the present invention with the bar in the torque section;
fig. 18 is an enlarged view at B in fig. 16.
Wherein, each reference sign in the figure:
1-a handle; 2-an inner gear ring; 21-a clamping plate; 3-sleeve; 31-a brake rack; 4-swing arm, 5-swing arm rotating shaft; 41-first tines; 42-a first rack; 43-through holes; 51-second tines; 52-a second rack; 6-torsion grooves; 61-a first sliding section; 62-a second sliding section; 63-torque segment; 7-cover plate; 71-a shift slot; 711-stop lever chute; 712-pressure tank; 72-notch; 73-clamping grooves; 8-stop lever; 9-a limiting mechanism; 91-a second receiving hole; 92-spring; 93-clamping head; 10-a first receiving hole; 101-ejector spring.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.
Referring to fig. 1 to 17, a description will now be given of a ratchet torque wrench according to the present invention. The ratchet torque wrench comprises:
a handle 1 with an inner gear ring 2 at one end;
the sleeve 3 is rotatably arranged in the annular gear 2 and is used for being clamped with a bolt, and a brake rack 31 is arranged on the outer side surface of the sleeve 3;
the swing arm 4 is arranged outside the sleeve 3 and positioned at the inner side of the annular gear 2, the swing arm 4 is provided with a torsion groove 6, and two free ends of the swing arm 4 are respectively clamped with the annular gear 2 and the brake rack 31;
a stop lever 8 penetrating the torsion groove 6 and preventing the swing arm 4 from swinging in the screwing direction;
a cover plate 7 for pushing the bar 8 to slide along the torsion groove 6; and
the locking mechanism is connected between the annular gear 2 and the cover plate 7 and is used for fixing the annular gear 2 and the cover plate 7 when the stop lever 8 prevents the swing arm 4 from swinging along the screwing direction.
Compared with the prior art, the ratchet torque wrench provided by the invention has the advantages that after the cover plate 7 pushes the stop lever 8 to be clamped at one end of the torsion groove 6, the cover plate 7 and the annular gear 2 are locked and fixed by the locking mechanism, the position of the stop lever 8 is fixed, and the swing arm 4 is limited to swing in one direction only. When the handle 1 rotates in the rotation direction, the swing arm 4 swings in the rotation direction, so that the free end of the swing arm 4 is separated from the annular gear 2 or the brake rack 31, and the torque of the handle 1 is not transmitted to the sleeve 3; when the handle 1 rotates in the screwing direction, the swing arm 4 is clamped between the ring gear 2 and the sleeve 3 by the stop lever 8, so that the torque of the handle 1 is transmitted to the sleeve 3. When the ratchet torque wrench is used, torque is only transmitted in the screwing direction, and torque is not transmitted in the rotation direction, so that the technical problem that the wrench is separated from a screw and clamped for a plurality of times during use, and the operation efficiency of an operator is affected is avoided. (recitation of effects should be considered to correspond to the recitation of the claims herein)
Specifically, the inner gear ring 2 is fixedly mounted on the top end of the handle 1. The sleeve 3 is clamped with a nut of a bolt by installing an extension rod or a sleeve, the inside of the sleeve 3 can be the same as the structure of the sleeve 3 of a common ratchet torque wrench, and the shape of an inner hole of the sleeve 3 can be square or quincuncial. The sleeve 3 can also be directly clamped with a nut of a bolt, and the shape of an inner hole of the sleeve can be square or quincuncial. The sleeve 3 is rotatably mounted on the top end of the handle 1 and is positioned inside the ring gear 2. The brake rack 31 outside the sleeve 3 may be a gear wheel encircling the outer circumference of the sleeve 3 or may be a section of rack. The swing arm 4 is hinged on the protruding rotating shaft at the top end of the handle 1 and is positioned in the areas outside the sleeve 3 and inside the annular gear 2, and two ends of the swing arm 4 are respectively clamped with the annular gear 2 and the brake rack 31. The torsion groove 6 is provided at the free end of the swing arm 4 engaged with the brake rack 31. The torsion groove 6 may be a circular arc-shaped through groove penetrating the swing arm 4. The cover plate 7 can be disc-shaped, the circumference of the cover plate 7 is provided with an annular clamping groove 73, the top of the annular gear 2 is provided with an annular bulge, and the clamping groove 73 is matched with the bulge to enable the cover plate 7 to be rotationally connected with the annular gear 2. The cover plate 7 is provided with a notch 72 such that the sleeve 3 extends through the cover plate 7 and out of the ring gear 2. The sleeve 3 may be connected with the notch 72 so that the sleeve 3 rotates more stably. The sleeve 3 may also merely pass through the notch 72 and be disconnected. The cover plate 7 is provided with a gear shifting groove 71, the gear shifting groove 71 can be a long strip groove arranged along the radial direction of the cover plate 7, and the cover plate 7 is rotated to push the stop lever 8 along the torsion groove 6 through the side wall of the gear shifting groove 71. The locking mechanism can be a clamping structure consisting of a clamping plate 21 hinged on the annular gear 2, a clamping groove 73 at the edge of the cover plate 7 and the like. The locking mechanism is used for locking and fixing the cover plate 7 and the annular gear 2 after the cover plate 7 rotates in place. More specifically, the axes of the handle 1, the ring gear 2 and the sleeve 3 coincide.
When the gear shifting device is used, the cover plate 7 is rotated to enable the side wall of the gear shifting groove 71 to push the stop lever 8 to the closed end of the torsion groove 6, the swing arm 4 can only swing anticlockwise, the cover plate 7 and the annular gear 2 are locked and fixed through the locking mechanism, at the moment, if the handle 1 is rotated anticlockwise, the stop lever 8 slides along the first sliding section 61, the swing arm 4 swings anticlockwise, the swing arm 4 is clamped and separated with the annular gear 2, and the rotation of the annular gear 2 can not drive the sleeve 3 to rotate; if the handle 1 is rotated clockwise, the gear shifting grooves 71 on the torsion groove 6 and the cover plate 7 on the swing arm 4 clamp the stop lever 8, so that the swing arm 4 cannot swing, two ends of the swing arm 4 are respectively clamped with the annular gear 2 and the sleeve 3, the annular gear 2 and the sleeve 3 are connected into a whole through the swing arm 4, and the annular gear 2 drives the sleeve 3 to rotate clockwise. After the cover plate 7 is rotated so that the side wall of the gear shifting groove 71 pushes the stop lever 8 to the other closed end of the torsion groove 6, the swing arm 4 can only swing clockwise, the clockwise rotation handle 1 can not drive the sleeve 3 to rotate, and the anticlockwise rotation handle 1 can drive the sleeve 3 to rotate.
Further, as shown in fig. 1-3, 6-10, 11-13 and 15-17, as a specific embodiment of the ratchet torque wrench provided by the present invention, the torsion slot 6 includes a circular arc-shaped first sliding section 61 coaxially disposed with the swing arm 4, a circular arc-shaped second sliding section 62 coaxially disposed with the swing arm 4, and a circular arc-shaped torque section 63 communicating between the first sliding section 61 and the second sliding section 62; in the radial direction of the first sliding section 61, the torque section 63 protrudes from the circumference of the first sliding section 61.
Specifically, the first sliding section 61 and the second sliding section 62 are both arc-shaped grooves, and the radii of the arcs are the same. The torque section 63 is communicated between the first sliding section 61 and the second sliding section 62, and the first sliding section 61, the second sliding section 62 and the torque section 63 may be an integral through slot, one end of the slot in the anticlockwise direction is a closed end of the first sliding section 61, and the other end in the clockwise direction is a closed end of the second sliding section 62. The shift groove 71 pushes the stop lever 8 to the closed end of the first sliding section 61 to prevent the swing arm 4 from swinging in one direction. The gear shifting groove 71 pushes the stop lever 8 to the closed end of the second sliding section 62 to prevent the swing arm 4 from swinging in the other direction.
When the gear shifting device is used, the cover plate 7 is rotated to enable the side wall of the gear shifting groove 71 to push the stop lever 8 to the closed end of the first sliding section 61, so that the swing arm 4 can only swing anticlockwise, at the moment, the cover plate 7 is positioned at a first gear, the cover plate 7 and the annular gear 2 are locked and fixed through the locking mechanism, at the moment, if the handle 1 is rotated anticlockwise, the stop lever 8 slides along the first sliding section 61, the swing arm 4 swings anticlockwise, the swing arm 4 is clamped and separated with the annular gear 2, and the rotation of the annular gear 2 can not drive the sleeve 3 to rotate; if the handle 1 is rotated clockwise, the stop lever 8 is clamped by the closed end of the first sliding section 61 on the swing arm 4 and the gear shifting groove 71 on the cover plate 7, so that the swing arm 4 cannot swing, two ends of the swing arm 4 are respectively clamped with the annular gear 2 and the sleeve 3, the annular gear 2 and the sleeve 3 are connected into a whole through the swing arm 4, and the annular gear 2 drives the sleeve 3 to rotate clockwise. The cover plate 7 is rotated to enable the side wall of the gear shifting groove 71 to push the stop lever 8 to the closed end of the second sliding section 62 from the closed end of the first sliding section 61, so that the swing arm 4 can only swing clockwise, at the moment, the cover plate 7 is positioned at the second gear, the cover plate 7 and the annular gear 2 are locked and fixed through the locking mechanism, at the moment, if the handle 1 is rotated clockwise, the stop lever 8 slides along the second sliding section 62, the swing arm 4 swings clockwise, so that the swing arm 4 is separated from the annular gear 2 in a clamping way, and the rotation of the annular gear 2 does not drive the sleeve 3 to rotate; if the handle 1 is rotated anticlockwise, the stop lever 8 is clamped by the closed end of the second sliding section 62 on the swing arm 4 and the gear shifting groove 71 on the cover plate 7, so that the swing arm 4 cannot swing, two ends of the swing arm 4 are respectively clamped with the annular gear 2 and the sleeve 3, the annular gear 2 and the sleeve 3 are connected into a whole through the swing arm 4, and the annular gear 2 drives the sleeve 3 to rotate anticlockwise. The torque section 63 has a circular arc shape having a curvature different from that of the first and second sliding sections 61 and 62. The concave side of the torque section 63 faces the sleeve 3, and the side wall of the gear shifting groove 71 is used for pushing the stop lever 8 to slide along the torque section 63. The first sliding section 61 and the second sliding section 62 have the same radius. The torque section 63 may be circular arc or parabolic, and the torque section 63 is located between the first sliding section 61 and the second sliding section 62, and two ends are respectively connected to the first sliding section 61 and the second sliding section 62.
Further, as shown in fig. 1, 2, 4, 8-12 and 14-17, as a specific embodiment of the ratchet torque wrench provided by the present invention, a gear shifting groove 71 is provided on the cover plate 7; the gear shifting groove 71 comprises a circular arc-shaped stop lever chute 711 coaxially arranged with the swing arm 4 and a pressure groove 712 communicated with the stop lever chute 711; the pressure groove 712 is disposed along the radial direction of the bar chute 711, and the torque section 63 is used to push the bar 8 to slide along the pressure groove 712.
Specifically, two ends of the bar chute 711 respectively correspond to the closed end of the first sliding section 61 and the closed end of the second sliding section 62. The pressure groove 712 is provided along the arc radius of the bar chute 711, i.e., along the radius direction of the rotation circumference of the cover 7. The movement of the bar 8 along the first sliding section 61, the second sliding section 62 and the torque section 63 is decomposed into a circumferential movement along the rotational circumferential direction of the cover plate 7, which is realized by the rotation of the cover plate 7, and a radial movement along the radial direction of the rotational circumference of the cover plate 7, which is realized by the pressure groove 712, so that the rotation of the cover plate 7, the shift groove 71 can push the bar 8 to move along the first sliding section 61, the second sliding section 62 and the torque section 63. The stop lever chute 711 is used for rotating the cover plate 7 to clamp the end of the stop lever chute 711 with the stop lever 8 after the stop lever 8 is pushed to the closed end of the first sliding section 61 or the closed end of the second sliding section 62 by the pressure groove 712, so that the end of the stop lever chute 711 is clamped with the closed end of the first sliding section 61 or the closed end of the second sliding section 62 more firmly, and the side wall of the pressure groove 712 is prevented from being damaged.
Further, as shown in fig. 4, 5 and 14, as a specific embodiment of the ratchet torque wrench provided by the present invention, the side walls at both ends and in the middle of the bar chute 711 are respectively provided with a limiting mechanism 9 for limiting the bar 8 at both ends of the bar chute 711 and for limiting the bar 8 at a position corresponding to the opening of the pressure groove 712 in the bar chute 711. The stop mechanism 9 of the part of the stop lever sliding groove 711 communicated with the opening of the pressure groove 712 enables the stop lever 8 to slide into the pressure groove 712 more easily, and the stop mechanism 9 can make the stop lever 8 enter various positions more clearly.
Further, as shown in fig. 4 and 5, as an embodiment of the ratchet torque wrench provided by the present invention, the limiting mechanism 9 includes a second receiving hole 91 provided on a sidewall of the gear shifting slot 71, a spring 92 provided in the second receiving hole 91, and a chuck 93; in the free state, the head of the chuck 93 protrudes from the wall of the shift groove 71.
Specifically, the second accommodating hole 91 is a blind hole, and the opening is provided with a shrink ring. The tail end of the clamping head 93 is provided with a step. The spring 92 and the clamping head 93 are installed in the second accommodating hole 91, the clamping head 93 is pushed outwards by the spring 92, so that the head of the clamping head 93 protrudes out of the side wall of the gear shifting groove 71 and is used for clamping the stop lever 8, a step at the tail end of the clamping head 93 is clamped on a shrink ring at the opening of the second accommodating hole 91, and the clamping head 93 is prevented from being completely pushed out of the second accommodating hole 91 by the spring 92.
Further, as a specific embodiment of the ratchet torque wrench provided by the present invention, the pressure groove 712 is provided with a pushing structure for pushing the bar 8 along the pressure groove 712 toward the bar chute 711.
Further, as shown in fig. 2, 4, 8-10, 12 and 14-18, as a specific embodiment of the ratchet torque wrench provided by the present invention, the ejection structure includes: a first receiving hole 10 provided in a side wall of the pressure groove 712 near one end of the rotation axis of the cover plate 7, and an ejector spring 101 provided in the first receiving hole 10 and the pressure groove 712.
In particular, the locking mechanism is used to fix the ring gear 2 with the cover plate 7 when the bar 8 is located in the torque section 63 and the pressure groove 712. The first receiving hole 10 is a blind hole, which is disposed on a sidewall of the pressure groove 712 near one end of the rotation axis of the cover plate 7, and is disposed along a radial direction of the rotation circumference of the cover plate 7. One end of the pushing spring 101 is fixed in the first accommodating hole 10, and the other end extends into the pressure groove 712 to push the stop lever 8 along the pressure groove 712 toward the stop lever sliding groove 711. When the bar 8 slides along the torque section 63, the bar 8 approaches the rotation axis of the cover plate 7, at this time, the bar 8 moves in the pressure groove 712 to compress the ejector spring 101, and when the bar 8 is at the limit position approaching the rotation axis of the cover plate 7, the bar 8 compresses the ejector spring 101 to the maximum extent. By setting the parameters of the ejector spring 101, the thrust force of the ejector spring 101 is adjusted. As shown in fig. 10 and 17, when the swing arm 4 swings, the torque section 63 of the swing arm 4 pushes the bar 8 to gradually compress the push spring 101, and when the swing arm 4 swings to a certain angle, the swing arm 4 is separated from the ring gear 2. In the process, the inner gear ring 2 applies force to one end of the swing arm 4, the push spring 101 pushes the stop lever 8 to apply force to the other end of the swing arm 4, and when the forces at the two ends of the lever structure of the swing arm 4 are balanced, the swing arm 4 cannot swing, so that the torque of the handle 1 is transmitted to the sleeve 3. When the moment of the force of the annular gear 2 on the swing arm 4 is larger than the moment of the force applied by the pushing spring 101 to push the stop lever 8 to the swing arm 4, the swing arm 4 continues to swing until the swing arm 4 is separated from the annular gear 2, and the handle 1 and the sleeve 3 relatively rotate. Thus, by setting the parameters of the ejector spring 101, when the torque of the handle 1 is greater than a certain limit value, the handle 1 and the sleeve 3 are rotated relatively, and the maximum torque of the sleeve 3 is limited. The relation between the spring 92 parameter and the maximum torque of the sleeve 3 can be obtained through structural calculation; the torque of the ratchet torque wrench corresponding to the ejection spring 101 with different parameters can be calibrated by replacing the springs 92 with different parameters and respectively testing the torque of the ratchet torque wrench when the stop lever 8 slides along the torque section 63.
Further, as shown in fig. 1, 3 and 6-10, as a specific embodiment of the ratchet torque wrench provided by the present invention, the swing arm 4 includes a first swing block, the first swing block is provided with a through hole 43 for passing the sleeve 3, a free end of the first swing block is provided with a first pointed tooth 41 for being engaged with the ring gear 2, and an arc-shaped first rack 42 for being engaged with the brake rack 31 is provided at an inner side of the through hole 43.
Specifically, the first swing block is clamped with the inner gear ring 2 through the first sharp teeth 41 at one end, and the first sharp teeth 41 can be single gear teeth, so that the first swing block is easier to separate from the inner gear ring 2. The sleeve 3 passes through the through hole 43 of the first pendulum, so that the first pendulum can span the sleeve 3, and the length of the first pendulum can be larger. The side wall of the through hole 43 far away from the rotation axis of the swing arm 4 is provided with an arc-shaped first rack 42, the first rack 42 can also be a circular ring gear 2, and the periphery of the corresponding sleeve 3 is provided with gear teeth.
Further, as shown in fig. 11-13 and 15-17, as a specific embodiment of the ratchet torque wrench provided by the invention, the swing arm 4 includes a second swing block, a free end of the second swing block is provided with a second sharp tooth 51 for being engaged with the ring gear 2, and another free end of the second swing block is provided with an arc-shaped second rack 52 engaged with the brake rack 31.
In particular, the second pendulum mass may be disc-shaped, located between the ring gear 2 and the sleeve 3. The second swing block is clamped with the inner gear ring 2 through the second sharp teeth 51 on one side, and the second sharp teeth 51 can be single gear teeth, so that the clamping of the second swing block and the inner gear ring 2 is easier to separate. The edge of the other side of the second swinging block is provided with an arc-shaped second rack 52, and the periphery of the corresponding sleeve 3 is provided with gear teeth in a surrounding way.
Further, as shown in fig. 1-4 and 8-17, as a specific embodiment of the ratchet torque wrench provided by the present invention, the locking mechanism includes a clamping groove 73 provided at an outer edge of the cover plate 7 and a clamping plate 21 hinged to the ring gear 2 and used for being clamped with the clamping groove 73.
Specifically, when the cover plate 7 is located at the first gear, the first clamping groove 73 rotates to a position corresponding to the clamping plate 21, and the clamping plate 21 is turned over to clamp the clamping plate 21 into the first clamping groove 73, so that the cover plate 7 is fixed with the annular gear 2. When the cover plate 7 is in the second gear, the second clamping groove 73 rotates to a position corresponding to the clamping plate 21, and the clamping plate 21 is turned over, so that the clamping plate 21 is clamped into the second clamping groove 73, and the cover plate 7 and the annular gear 2 are fixed. When the stop lever 8 is located in the torque section 63 and is located at the position farthest from the rotation axis of the cover plate 7, the stop lever 8 is located at the communication position of the pressure groove 712 and the stop lever sliding groove 711, and at this time, the clamping plate 21 can be clamped into the third clamping groove 73, so that the cover plate 7 is fixed with the annular gear 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A ratchet torque wrench, comprising:
a handle (1) with an inner gear ring (2) at one end;
the sleeve (3) is rotationally arranged in the annular gear (2) and is used for being clamped with the bolt, and a brake rack (31) is arranged on the outer side surface of the sleeve (3);
the swing arm (4) is arranged outside the sleeve (3) and positioned at the inner side of the annular gear (2), a torsion groove (6) is formed in the swing arm (4), and two free ends of the swing arm (4) are respectively clamped with the annular gear (2) and the brake rack (31);
the stop lever (8) is penetrated in the torsion groove (6) and used for preventing the swing arm (4) from swinging along the screwing direction;
a cover plate (7) for pushing the stop lever (8) to slide along the torsion groove (6); and
the locking mechanism is connected between the inner gear ring (2) and the cover plate (7) and is used for fixing the inner gear ring (2) and the cover plate (7) when the stop lever (8) prevents the swing arm (4) from swinging along the screwing direction.
2. The ratchet torque wrench of claim 1, wherein: the torsion groove (6) comprises a circular arc-shaped first sliding section (61) coaxially arranged with the swing arm (4), a circular arc-shaped second sliding section (62) coaxially arranged with the swing arm (4) and a circular arc-shaped torque section (63) communicated between the first sliding section (61) and the second sliding section (62); in the radial direction of the first sliding section (61), the torque section (63) protrudes from the circumference of the first sliding section (61).
3. The ratchet torque wrench of claim 2, wherein: a gear shifting groove (71) is formed in the cover plate (7); the gear shifting groove (71) comprises a circular arc-shaped stop lever chute (711) and a pressure groove (712), wherein the circular arc-shaped stop lever chute (711) is coaxially arranged with the swing arm (4), and the pressure groove (712) is communicated with the stop lever chute (711); the pressure groove (712) is arranged along the radial direction of the stop lever chute (711), and the torque section (63) is used for pushing the stop lever (8) to slide along the pressure groove (712).
4. The ratchet torque wrench as claimed in claim 3, wherein: the side walls of the two ends and the middle part of the stop lever chute (711) are respectively provided with a limiting mechanism (9) used for limiting the stop lever (8) at the two ends of the stop lever chute (711) and limiting the stop lever (8) at the position corresponding to the opening of the pressure groove (712) in the stop lever chute (711).
5. The ratchet torque wrench as claimed in claim 4, wherein: the limiting mechanism (9) comprises a second accommodating hole (91) arranged on the side wall of the gear shifting groove (71), a spring (92) and a clamping head (93) which are arranged in the second accommodating hole (91); in the free state, the head of the clamping head (93) protrudes from the wall surface of the gear shifting groove (71).
6. The ratchet torque wrench as claimed in claim 3, wherein: the pressure groove (712) is provided with a pushing structure for pushing the stop lever (8) along the pressure groove (712) towards the stop lever chute (711).
7. The ratchet torque wrench as claimed in claim 6, wherein: the ejection structure includes: a first accommodating hole (10) arranged on the side wall of the pressure groove (712) near one end of the rotation axis of the cover plate (7), and a push spring (101) arranged in the first accommodating hole (10) and the pressure groove (712).
8. The ratchet torque wrench of any one of claims 1-7, wherein: the swing arm (4) comprises a first swing block, the first swing block is provided with a through hole (43) used for enabling the sleeve (3) to pass through, one free end of the first swing block is provided with a first sharp tooth (41) used for being clamped with the inner gear ring (2), and the inner side of the through hole (43) is provided with an arc-shaped first rack (42) used for being clamped with the brake rack (31).
9. The ratchet torque wrench of any one of claims 1-7, wherein: the swing arm (4) comprises a second swing block, one free end of the second swing block is provided with a second sharp tooth (51) for being clamped with the inner gear ring (2), and the other free end of the second swing block is provided with an arc-shaped second rack (52) for being clamped with the brake rack (31).
10. The ratchet torque wrench of any one of claims 1-7, wherein: the locking mechanism comprises a clamping groove (73) arranged at the outer edge of the cover plate (7) and a clamping plate (21) hinged to the inner gear ring (2) and used for being clamped with the clamping groove (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711293821.9A CN107775577B (en) | 2017-12-08 | 2017-12-08 | Ratchet torque spanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711293821.9A CN107775577B (en) | 2017-12-08 | 2017-12-08 | Ratchet torque spanner |
Publications (2)
| Publication Number | Publication Date |
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| CN107775577A CN107775577A (en) | 2018-03-09 |
| CN107775577B true CN107775577B (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711293821.9A Active CN107775577B (en) | 2017-12-08 | 2017-12-08 | Ratchet torque spanner |
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| CN (1) | CN107775577B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107775577A (en) | 2018-03-09 |
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