CN214560409U - Preset torque ratchet wrench - Google Patents
Preset torque ratchet wrench Download PDFInfo
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- CN214560409U CN214560409U CN202022685311.XU CN202022685311U CN214560409U CN 214560409 U CN214560409 U CN 214560409U CN 202022685311 U CN202022685311 U CN 202022685311U CN 214560409 U CN214560409 U CN 214560409U
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Abstract
The utility model relates to a machine tool field, concretely relates to preset moment of torsion ratchet spanner, the electric iron comprises a handle, the chief head, the connector, decide the moment of torsion round pin, the screw rod, the pointer sleeve, the pointer, a spring, the ratchet, driving lever and two pawls, chief head processing has the chamber that holds the ratchet, driving lever and pawl, the ratchet rotates with the chief head to be connected and concentric with the through-hole of chief head, the pawl is located ratchet side, the pawl rotates with the chief head to be connected, the pawl has the magnetism of inhaling mutually with the ratchet, the driving lever is installed between two pawls and is connected with the chief head rotation, the driving lever makes the pawl and the ratchet break away from the contact when rotating to side, ratchet processing has the breach that is used for holding the round pin post, the width of breach is greater than the round pin diameter. The utility model discloses a substantive effect is: the screw is suitable for screws with various specifications, and the application range is expanded; the elastic coefficient of the spring is reduced, so that the torque can be set conveniently and quickly, the working efficiency is improved, and the production cost of the spring is reduced.
Description
Technical Field
The utility model relates to a mechanical tool field, concretely relates to preset moment of torsion ratchet spanner.
Background
Torque wrenches are classified into electric torque wrenches and manual torque wrenches. The moment is the product of the force and the distance. The torque wrench is used for operation, and the torque applied is required to be controlled when the screw fasteners such as screws, bolts, nuts and the like are fastened so as to ensure that the screw threads are fastened and the screw threads are not damaged due to overlarge torque. Firstly, a required upper limit of torque value is set, when the applied torque reaches a set value, the wrench can make a sound or the wrench joint is bent a little, which indicates that the screw is fastened without applying force.
Chinese patent publication No. CN208773421U, publication No. 2019, 04/23/2019, discloses a practical large-torque ratchet wrench, which includes a pull rod, a socket joint fixedly connected with the pull rod to a clamping cavity, and a fastening assembly disposed inside the clamping cavity; fastening assembly includes that the circumference interval is located the recess of the adjacent inner wall handing-over department in card chamber, locate the commentaries on classics round pin in the recess and be fixed in each and change the fastener on the round pin, the lower tank bottom swing joint of the one end of commentaries on classics round pin and recess, the other end that should change the round pin is worn out the recess from the last cell wall of recess and is articulated at this end of changeing the round pin change the round pin and cup joint the handing-over department of connecing and be equipped with the spout that supplies to change the round pin slip and radially extend, the top center department of each inner wall in card chamber all extends to the center in card chamber has the dead lever, and the equal fixedly connected with snap ring that supplies each snap ring to pass of the equal fixedly connected with in free end of each dead lever, and equal fixed connection between each snap ring. However, it requires a large force to be applied to set the upper limit of the torque, and is laborious and inefficient.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: there is a need for a ratchet wrench that is fast and labor-saving in setting torque.
In order to solve the technical problem, the utility model discloses the technical scheme who takes does: a preset torque ratchet wrench comprises a handle, a main head, a connector, a fixed torque pin, a screw, a pointer sleeve, a pointer, a spring, a ratchet wheel, a shifting rod and two pawls, wherein the handle is provided with an inner hole in a penetrating mode along the axis direction, the handle is fixedly connected with the main head, the main head is provided with a through hole for rotatably installing the connector in a processing mode, the connector comprises a cylindrical portion, a pin column and a connector portion, the connector portion is located at one end of the cylindrical portion, the pin column radially penetrates through the cylindrical portion along the cylindrical portion, the connector portion and the pin column are both fixedly connected with the cylindrical portion, the cylindrical portion is matched with the through hole of the main head to form a rotating pair, the main head is provided with a containing cavity for containing the ratchet wheel, the shifting rod and the pawls, the ratchet wheel is rotatably connected with the main head and concentric with the through hole of the main head, the pawls are located on the side of the ratchet wheel, the pawls are rotatably connected with the main head, and the pawls have attractive magnetism, the driving lever is installed between the two pawls and is connected with the main head in a rotating mode, when the driving lever rotates towards the side, the pawls on one corresponding side are separated from the ratchet wheel, the ratchet wheel is provided with a notch used for accommodating a pin, the width of the notch is larger than the diameter of the pin, the bottom of the notch is provided with an arc groove, the radius of the arc groove is equivalent to that of the pin, the central angle of the arc groove is smaller than 180 degrees, when the cylindrical part of the connector is placed in the through hole of the main head, the pin is abutted against the arc groove, the main head is internally provided with a through hole concentric with an inner hole, the through hole enables the inner hole of the handle to be communicated with the side face of the through hole of the main head, the constant-torque pin is installed in the through hole, the constant-torque pin head is provided with an inclination, the cylindrical part of the connector is provided with a notch matched with the constant-torque pin head, and the constant-torque pin head is abutted against the cylindrical part of the connector, the spring is put into the hole and with decide moment of torsion round pin afterbody butt, the screw rod is put into the hole just rotates with the handle and is connected, the screw rod is along handle axis direction and handle relatively fixed, pointer sleeve one end processing have with screw rod complex screw thread, the pointer sleeve other end and spring butt, the pointer is radially installed on the pointer sleeve along the pointer sleeve, the stroke processing that the handle corresponds the pointer has the instruction groove, instruct groove both sides processing scale mark.
When the preset torque ratchet wrench is used, the hand wheel needs to be rotated to extrude the spring, so that the pointer corresponding to the handle is positioned at the scale mark of the indicating groove, the required torque is set, and the nut to be installed can be screwed by using the torque ratchet wrench. When the force of a user reaches the set torque, the upward component force generated by the connector at the notch of the ratchet overcomes the downward resistance generated by the fixed-torque pin at the butting position of the connector, the connector moves upward and rotates simultaneously, the two ends of the pin column of the connector impact the two side walls of the notch of the ratchet to make a sound and vibrate, the set torque is prompted to be reached, and the function of the fixed torque is finished without applying force.
Preferably, the head part of the fixed torque pin is hemispherical, a notch matched with the head part of the fixed torque pin is machined in the connecting head, and the spherical center of the head part of the fixed torque pin is positioned outside the notch.
Preferably, the head of the fixed torque pin is hemispherical, an arc notch is machined in the cylindrical part of the connector, the shape of the arc notch is matched with that of the head of the fixed torque pin, and the radian of a corresponding central angle of the arc notch is smaller than 180 degrees.
The notch of the cylindrical part of the connector is processed into a shape matched with the head part of the fixed torque pin, and the notch cannot be larger than a straight angle.
The utility model discloses a substantive effect is: the screw is suitable for screws with various specifications, and the application range is expanded; the ratchet structure improves the screwing efficiency; the elastic coefficient of the spring is reduced, so that the torque can be set conveniently and quickly, the working efficiency is improved, and the production cost of the spring is reduced.
Drawings
Fig. 1 is a schematic structural view of a torque ratchet wrench according to a first embodiment.
Fig. 2 is a schematic structural diagram of a main head according to the first embodiment.
Fig. 3 is a schematic side view of the main head according to the first embodiment.
Fig. 4 is a schematic structural diagram of a connecting head according to the first embodiment.
Fig. 5 is a schematic structural view of a ratchet according to the first embodiment.
The hand wheel comprises a handle 1, a grip handle 2, a hand wheel 3, a pointer 4, a pointer groove 5, a scale mark 6, a handle 7, a main head 9, a connector 10, a plug 11, a limit ring 12, a screw rod 13, a sliding rod 14, a spring 15, a fixed-moment pin 21, a deflector rod 22, a pawl 23, a ratchet wheel 901, a pin column 902, a cylindrical part 903, a square interface 904, a ring groove 2301, a wheel body 2302, a notch 2303 and an arc groove.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The first embodiment is as follows:
a preset torque ratchet wrench comprises a handle 6, a main head 7, a connector 9, a fixed torque pin, a screw 12, a pointer 3 sleeve, a pointer 3, a spring 14, a ratchet wheel 23, a shift lever 21 and two pawls 22, wherein an inner hole is formed in the handle 6 in a penetrating mode along the axial direction, the handle 6 is fixedly connected with the main head 7, and a through hole used for rotatably installing the connector 89 is formed in the main head 7 as shown in figure 2. As shown in fig. 4, the connecting head 9 includes a cylindrical portion 902, a pin 901 and a connecting portion, the connecting portion is located at one end of the cylindrical portion 902, the pin 901 radially penetrates through the cylindrical portion 902 along the cylindrical portion 902, the connecting portion and the pin 901 are both fixedly connected to the cylindrical portion 902, and the cylindrical portion 902 cooperates with the through hole of the main head 7 to form a revolute pair. As shown in fig. 3, two sides of the main head 7 are provided with a cavity for accommodating a ratchet wheel 23, a shift lever 21 and a pawl 22, the ratchet wheel 23 is rotatably connected with the main head 7 and is concentric with a through hole of the main head 7, the pawl 22 is positioned at one side of the ratchet wheel 23, the pawl 22 is rotatably connected with the main head 7, the pawl 22 and the ratchet wheel 23 have attractive magnetism, the shift lever 21 is arranged between the two pawls 22 and is rotatably connected with the main head 7, when the shift lever 21 rotates towards the side, the pawl 22 at the corresponding side is separated from the ratchet wheel 23, as shown in fig. 5, a notch for accommodating the pin 901 is formed in the wheel body 2301 of the ratchet 23, the width of the notch is greater than the diameter of the pin 901, an arc groove is formed in the bottom of the notch, the radius of the arc groove 2303 is equal to that of the pin, the central angle of the arc groove 2303 is less than 180 degrees, and when the cylindrical portion 902 of the connector 9 is placed in the through hole of the main head 7, the pin 901 abuts against the arc groove 2303. The main head 7 is internally provided with a through hole concentric with the inner hole, the through hole enables the inner hole of the handle 6 to be communicated with the side surface of the through hole of the main head 7, the fixed torque pin is arranged in the through hole, the head part of the fixed torque pin has inclination, the cylindrical part 902 of the connector 9 is provided with a notch 2302 matched with the head part of the fixed torque pin, the head part of the fixed torque pin is abutted against the cylindrical part 902 of the connector 9, the spring 14 is arranged in the inner hole and abutted against the tail part of the fixed torque pin, the screw 12 is arranged in the inner hole and rotatably connected with the handle 6, the screw 12 is relatively fixed with the handle 6 along the axial direction of the handle 6, one end of the sleeve of the pointer 3 is provided with a thread matched with the screw 12, the other end of the sleeve of the pointer 3 is abutted against the spring 14, the pointer 3 is radially arranged on the sleeve of the pointer 3, the handle 6 is provided with an indication groove corresponding to the stroke processing of the pointer 3, and scale marks 5 are arranged on two sides of the indication groove. Decide the moment of torsion round pin head and be the hemisphere type, the cylindric part 902 processing of connector 89 has arc breach 2302, and arc breach 2302 shape matches with decide moment of torsion round pin head, and the central angle radian that corresponds of arc breach 2302 is less than 180 degrees.
The preset torque ratchet wrench needs to set a torque value before use. The using method comprises the following steps: and rotating the hand wheel to extrude the spring, so that the pointer corresponding to the handle is positioned at the scale mark of the indicating groove, and setting the required torque, namely screwing the nut to be installed by using the torque ratchet wrench.
When the force of the user reaches the set torque, the upward component force generated by the connector 9 at the notch 2303 of the ratchet wheel 23 overcomes the downward resistance generated by the fixed moment pin 15 at the abutting position of the connector 9, the connector 9 moves upward and rotates simultaneously, the two ends of the pin 901 of the connector 9 strike the two side walls of the notch 2302 of the ratchet wheel 23 to make a sound and vibrate to indicate that the set torque is reached, and the function of the fixed torque is completed without applying force.
When the user needs to rotate the grip reversely, the pawl 22 is separated from the limit of the ratchet wheel 23, so that the position of the grip 1 can be conveniently reversely adjusted, and the nut can be continuously screwed without taking off the sleeve.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (3)
1. A preset torque ratchet wrench is characterized in that,
comprises a handle, a main head, a connector, a fixed torque pin, a screw rod, a pointer sleeve, a pointer, a spring, a ratchet wheel, a deflector rod and two pawls,
the handle is provided with an inner hole in a penetrating way along the axis direction, the handle is fixedly connected with the main head, the main head is provided with a through hole for rotatably installing the connector,
the connector comprises a cylindrical part, a pin column and a connector part, the connector part is positioned at one end of the cylindrical part, the pin column penetrates through the cylindrical part along the radial direction of the cylindrical part, the connector part and the pin column are both fixedly connected with the cylindrical part, the cylindrical part is matched with the through hole of the main head to form a revolute pair,
the main head is provided with a containing cavity for containing a ratchet wheel, a shifting rod and a pawl, the ratchet wheel is rotatably connected with the main head and is concentric with a through hole of the main head, the pawl is positioned on the side of the ratchet wheel, the pawl is rotatably connected with the main head, the pawl and the ratchet wheel have attractive magnetism, the shifting rod is arranged between the two pawls and is rotatably connected with the main head, the pawl on one corresponding side is separated from the ratchet wheel when the shifting rod rotates towards the side, the ratchet wheel is provided with a notch for containing a pin, the width of the notch is larger than the diameter of the pin, an arc groove is processed at the bottom of the notch, the radius of the arc groove is equivalent to that of the pin, the central angle of the arc groove is smaller than 180 degrees, when the cylindrical part of the connector is placed in the through hole of the main head, the pin is abutted to the arc groove,
a through hole concentric with the inner hole is processed in the main head, the through hole enables the inner hole of the handle to be communicated with the side surface of the through hole of the main head, the fixed torque pin is arranged in the through hole, the head of the fixed torque pin is provided with an inclination, the cylindrical part of the connector is provided with a notch matched with the head of the fixed torque pin, the head part of the constant torque pin is abutted against the cylindrical part of the connector, the spring is arranged in the inner hole and is abutted against the tail part of the constant torque pin, the screw rod is arranged in the inner hole and is rotationally connected with the handle, the screw rod is relatively fixed with the handle along the axial direction of the handle, one end of the pointer sleeve is provided with a thread matched with the screw rod, the other end of the pointer sleeve is abutted against the spring, the pointer is radially installed on the pointer sleeve along the pointer sleeve, an indication groove is machined in the handle corresponding to the stroke of the pointer, and scale marks are machined on two sides of the indication groove.
2. The preset torque ratchet wrench of claim 1,
decide the moment of torsion round pin head and be the hemisphere, the connector processing have with decide the breach that the moment of torsion round pin head matches, the centre of sphere of deciding the moment of torsion round pin head is located outside the breach.
3. The preset torque ratchet wrench of claim 1 or 2,
the fixed torque pin head is hemispherical, an arc notch is processed in the cylindrical part of the connector, the shape of the arc notch is matched with that of the fixed torque pin head, and the corresponding central angle radian of the arc notch is smaller than 180 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022685311.XU CN214560409U (en) | 2020-11-19 | 2020-11-19 | Preset torque ratchet wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022685311.XU CN214560409U (en) | 2020-11-19 | 2020-11-19 | Preset torque ratchet wrench |
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| Publication Number | Publication Date |
|---|---|
| CN214560409U true CN214560409U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022685311.XU Active CN214560409U (en) | 2020-11-19 | 2020-11-19 | Preset torque ratchet wrench |
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| Country | Link |
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| CN (1) | CN214560409U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112405413A (en) * | 2020-11-03 | 2021-02-26 | 杭州倍力耐工具有限公司 | Preset torque wrench |
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2020
- 2020-11-19 CN CN202022685311.XU patent/CN214560409U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112405413A (en) * | 2020-11-03 | 2021-02-26 | 杭州倍力耐工具有限公司 | Preset torque wrench |
| CN112405413B (en) * | 2020-11-03 | 2024-07-19 | 杭州倍力耐工具有限公司 | Preset torque wrench |
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