CN219542996U - Ratchet wrench - Google Patents

Abstract

The utility model relates to a ratchet wrench, which comprises a handle, a fixed seat and a ratchet wheel, wherein the ratchet wheel is rotatably arranged in the fixed seat; the ratchet wheel is provided with a second operation through hole, and a first operation through hole is arranged at the position of the fixing seat corresponding to the second operation through hole; the inside of the handle is provided with a guide hole, the inside of the fixing seat is provided with a communication hole, and the communication hole is communicated with the ratchet wheel mounting hole and the guide hole; the device also comprises a pushing rod, wherein the pushing rod comprises a guide part and a pawl which are connected into a whole; the guide part is arranged in the guide hole in a sliding way and can not rotate relative to the guide hole, and an elastic piece is arranged between one end of the guide part, which is away from the pawl, and the inner wall of the guide hole; the pawl is arranged in the communication hole in a sliding way and meshed with the ratchet wheel; after the threaded fastener is clamped with the ratchet wheel, under the combined action of the elastic piece and the pushing rod, the ratchet wheel can only rotate along one direction with the handle, and when the handle rotates reversely, the pawl rotates relative to the ratchet wheel. The wrench can be applied to a small-space installation environment, so that the labor capacity of workers is reduced, and the production efficiency is greatly improved.

Description

Ratchet wrench

Technical Field

The utility model relates to the technical field of wrenches, in particular to a ratchet wrench.

Background

Conventional ratchet wrenches, such as those disclosed in patent documents CN101085512 and CN101288948B, CN1144656C, have a complicated structure of the wrench head, and thus have a relatively large size, and the outer contour dimension of the wrench head is generally larger than 15mm. For the screw loading and unloading process of screws with the distance from the side wall being smaller than 7.5mm, the traditional ratchet wrench cannot be used due to the limitation of the head size, and can only be operated by using a conventional L-shaped internal hexagonal wrench. During operation, the internal hexagonal wrench is pulled out and inserted for a plurality of times to carry out the unloading operation, and the efficiency of actual operation is reduced by aligning the hexagonal opening for a plurality of times and pulling out and inserting for a plurality of times, so that the labor intensity and the labor cost are greatly increased.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the ratchet wrench which is suitable for operation in a narrow space, improves the production efficiency, and has a simple structure and low manufacturing cost.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the ratchet wrench comprises a handle, a fixed seat and a ratchet, wherein the handle and the fixed seat are detachably connected into a whole, the fixed seat is provided with a ratchet mounting hole, and the ratchet is rotatably arranged in the ratchet mounting hole; the ratchet wheel is provided with a second operation through hole, and a first operation through hole is arranged at the position of the fixing seat corresponding to the second operation through hole so that the threaded fastener can extend into the second operation through hole; the inside of the handle is provided with a guide hole, the inside of the fixing seat is provided with a communication hole, and the communication hole is communicated with the ratchet wheel mounting hole and the guide hole;

the device also comprises a pushing rod, wherein the pushing rod comprises a guide part and a pawl which are connected into a whole; the guide part is arranged in the guide hole in a sliding way and can not rotate relative to the guide hole, and an elastic piece is arranged between one end of the guide part, which is away from the pawl, and the inner wall of the guide hole; the pawl is arranged in the communication hole in a sliding way and meshed with the ratchet wheel;

after the threaded fastener is clamped with the ratchet wheel, under the combined action of the elastic piece and the pushing rod, the ratchet wheel can only rotate along one direction with the handle, and when the handle rotates reversely, the pawl rotates relative to the ratchet wheel.

As a preferable technical scheme, the handle is cylindrical; the outer wall of the handle is provided with a first positioning part, the outer wall of the fixing seat is provided with a second positioning part, and the first positioning part and the second positioning part are matched and positioned when the handle and the fixing seat are assembled.

As the preferable technical proposal, the outer wall of the guiding part is provided with a guiding groove which extends along the axial direction of the pushing rod; the handle is provided with a limit screw, the inner end of the limit screw stretches into the guide groove, and the guide groove is in clearance fit with the limit screw, so that the guide part is allowed to slide along the guide groove and cannot rotate.

As the preferable technical scheme, the side wall of the guide hole is provided with a screw hole and a screwed plug hole, and the screw hole and the screwed plug hole are coaxially arranged; the limit screw is in threaded connection with the screw hole, and a screwed plug is in threaded connection with the screwed plug hole.

As an optimized technical scheme, the inside of the handle is also provided with a process hole and a connecting hole, and the process hole and the connecting hole are respectively opened on two end surfaces of the handle; the process hole, the guide hole and the connecting hole are communicated in sequence, and the connecting hole is used for realizing connection between the fixing seat and the handle.

As an optimized technical scheme, the fixing seat comprises a fixed connection part, a switching part and a ratchet installation part; the switching part is positioned between the fixed connection part and the ratchet installation part and is used for connecting the fixed connection part and the ratchet installation part; the fixed connection part is cylindrical, an external thread is machined on the outer side wall, an internal thread is machined on the inner wall of the connecting hole, and the fixed connection part is screwed with the connecting hole.

As a preferable technical scheme, the ratchet installation hole is positioned in the ratchet installation part, and is opened on one side surface of the ratchet installation part, a cover plate is covered on the opening, and a third operation through hole is arranged on the cover plate; the third operation through hole is coaxially arranged with the first operation through hole.

As the preferable technical scheme, the ratchet wheel is characterized by further comprising a switching output rod, wherein the switching output rod is matched with the second operation through hole, so that synchronous rotation of the switching output rod and the ratchet wheel is realized.

As a preferable technical scheme, 6 gear teeth are uniformly distributed on the outer circumferential surface of the ratchet wheel.

As an optimal technical scheme, the maximum size of the outer outline of the fixing seat is smaller than or equal to 9.5mm.

Due to the adoption of the technical scheme, the ratchet wrench has the following advantages:

the push rod is matched with the ratchet wheel to allow the handle to reversely rotate; the push rod and the spring are positioned inside the handle, so that the size of the fixing seat is reduced, namely, the size of the head of the wrench can be small, for example, the size of the head of the wrench is smaller than or equal to 9.5mm, the wrench can be applied to a small-space installation environment, the labor capacity of workers is reduced to a great extent, the time is saved, and the production efficiency is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a handle;

FIG. 4 is a schematic view of the structure of the fixing base in a first view angle state;

FIG. 5 is a schematic view of the structure of the fixing base in a second view angle state;

FIG. 6 is a schematic cross-sectional view of the holder;

FIG. 7 is a schematic structural view of a cover plate;

FIG. 8 is a schematic view of the ratchet wheel;

FIG. 9 is a schematic cross-sectional view of the ejector rod;

FIG. 10 is a schematic perspective view of a push rod;

FIG. 11 is a schematic view showing the engagement state of the pawl with the ratchet.

In the figure:

1-a handle; 11-a first positioning part; 12-a guide hole; 13-connecting holes; 14-process holes; 15-plugging the hole; 16-screw holes;

2-an elastic member;

3-pushing the rod; 31-a guide; 32-guide grooves; 33-pawl; 34-action plane; 35-sliding surface;

4-limiting screws;

5-fixing seats; 51-a second positioning portion; 52-a fixed connection; 53-an adapter; 54-communicating holes; 55-ratchet mounting holes; 56-a ratchet mounting; 57-a first operation through hole;

6-ratchet wheel; 61-a second operation through hole; 62-gear teeth; 63-force bearing surface; 64-a slide guide surface;

7-cover plate; 71-a third operation through hole;

8-switching output rod.

Detailed Description

A ratchet wrench is shown in fig. 1 and 2, and comprises a handle 1, a fixed seat 5, a ratchet 6 and a pushing rod 3, wherein the handle 1 and the fixed seat 5 are detachably connected into a whole, the ratchet 6 is installed in the fixed seat 5, the pushing rod 3 is slidably arranged in the handle 1 and the fixed seat 5, one end of the pushing rod 3 is provided with an elastic piece 2, under the combined action of the elastic piece 2 and the pushing rod 3, the ratchet 6 can only rotate along one direction with the handle 1 and the fixed seat 5, and the ratchet 6 does not rotate along with the handle 1 and the fixed seat 5 in the opposite direction.

Specifically, the shape of the handle 1 can be designed according to the needs so as to be convenient to hold and operate; as shown in fig. 2 and 3, the handle 1 is preferably cylindrical, has a small outer contour size, is suitable for operation in a narrow space, and is convenient to hold. The outer wall of the handle 1 is provided with a first positioning part 11, and the first positioning part 11 may be a protrusion protruding to the outside of the handle 1 or a groove recessed to the inside of the handle 1.

The inside of the handle 1 is provided with a guide hole 12, a process hole 14 and a connecting hole 13, wherein the connecting hole 13 is used for realizing the connection between the fixed seat 5 and the handle 1; the guide hole 12 is used for installing the pushing rod 3. The process hole 14, the guide hole 12 and the connecting hole 13 are sequentially communicated, preferably coaxially arranged, and the process hole 14 and the connecting hole 13 are respectively opened on two end surfaces of the handle 1. The process holes 14 are smooth holes, so that the difficulty in machining and assembling can be reduced, and during machining, the arrangement of the process holes 14 is beneficial to removing machining scraps; during assembly, the process hole 14 can be used as a vent hole, so that the insertion of the pushing rod 3 is prevented from being influenced by suffocating.

Screw holes 16 and plug holes 15 are machined in the side walls of the guide holes 12, and the screw holes 16 and the plug holes 15 are arranged close to the connecting holes 13; optimally, the screw hole 16 and the plug hole 15 are coaxially arranged, and the screw hole 16 and the plug hole 15 can be machined by one cutter and one feeding, so that the machining process is simplified. The screw hole 16 is internally and threadedly connected with a limit screw 4, and the inner end of the limit screw 4 extends into the guide hole 12; the plug hole 15 is internally connected with a plug through screw threads, and lubricating oil can be filled between the guide hole 12 and the jacking rod 3 through removing the plug.

As shown in fig. 4, 5 and 6, the fixing base 5 has a fixed connection portion 52, an adapter portion 53 and a ratchet mounting portion 56; the fixed connection portion 52, the adapter portion 53 and the ratchet mounting portion 56 are integrally formed. The adapter 53 is located between the fixed connection 52 and the ratchet mounting 56, and engages the fixed connection 52 and the ratchet mounting 56.

The fixed connection part 52 is detachably connected with the handle 1, and the end face is limited; such as by bolts, screws, etc.; preferably, the fixed connection part 52 is cylindrical, the outer side wall is provided with external threads, the inner wall of the connection hole 13 is provided with internal threads, the fixed connection part 52 is screwed with the connection hole 13, and the external dimension of the connection part of the fixed connection part 52 and the handle 1 can be reduced in a threaded connection mode. The outer diameter of the adapter 53 is larger than that of the fixed connection part 52, and the end face of the adapter 53 limits the end face of the handle 1.

The ratchet mounting portion 56 is provided with a ratchet mounting hole 55 and a first operation through hole 57, the inner diameter of the ratchet mounting hole 55 is adapted to the outer diameter of the ratchet 6, the ratchet 6 is located in the ratchet mounting hole 55, the ratchet mounting hole and the ratchet mounting hole are in clearance fit, and the ratchet 6 can freely rotate in the ratchet mounting hole 55. The middle part of the ratchet wheel 6 is provided with a second operation through hole 61, and the second operation through hole 61 is in a regular hexagon shape; the ratchet mounting hole 55 limits the radial direction of the ratchet 6, so that the second operation through hole 61 and the first operation through hole 57 can be corresponding without being staggered. As shown in fig. 8, the outer circumferential surface of the ratchet 6 is uniformly distributed with gear teeth 62, and the gear teeth 62 have a force receiving surface 63 and a slide guide surface 64. The first operative through hole 57 is for a threaded fastener including, but not limited to, a bolt, a screw, a nut to extend into the second operative through hole 61; the inner diameter of the first operation through hole 57 is smaller than the inner diameter of the ratchet mounting hole 55. The ratchet mounting hole 55 is covered at its open end with a cover plate 7, and as shown in fig. 7, the cover plate 7 is provided with a third operation through hole 71, and the third operation through hole 71 is disposed coaxially with the first operation through hole 57. The cover plate 7 is fixed to the ratchet mounting portion 56 by welding, bonding, bolting, or the like, and limits the axial direction of the ratchet 6 together with the ratchet mounting portion 56.

The adapter 53 and the fixed connection 52 have a communication hole 54 therein, and the communication hole 54 communicates the ratchet mounting hole 55 with the guide hole 12. The second positioning portion 51 is disposed on the outer sidewall of the adapting portion 53, and the second positioning portion 51 may be a protrusion protruding to the outside of the adapting portion 53 or may be a groove recessed to the inside of the adapting portion 53. The first positioning portion 11 and the second positioning portion 51 cooperate with each other to perform positioning with reference to the assembly of the handle 1 and the fixing base 5.

The push rod 3 is slidably disposed in the guide hole 12 and the communication hole 54, and as shown in fig. 9 and 10, includes a guide portion 31 and a pawl 33, where the guide portion 31 is fixedly connected to the pawl 33, and the guide portion 31 and the pawl 33 may be of a detachable structure or an integral structure. The outer wall of the guide part 31 is provided with a guide groove 32, and the guide groove 32 extends along the axial direction of the pushing rod 3. When the jacking rod 3 is assembled in place, the limit screw 4 stretches into the guide groove 32 to prevent the jacking rod 3 from rotating. The guide hole 12 is provided with an elastic member 2, such as a spring; one end of the elastic member 2 abuts against the inner wall of the guide hole 12, and the other end abuts against the end of the push rod 3, and a force is applied to the push rod 3, and the pawl 33 is engaged with the ratchet 6, as shown in fig. 11. The end of the pawl 33 remote from the guide 31 has an active surface 34 and a sliding surface 35; when the pawl 33 is engaged with the ratchet 6, the slide surface 35 contacts and abuts against the slide guide surface 64, and a large thrust force cannot be transmitted; the acting surface 34 contacts and is attached to the force receiving surface 63, so that a large thrust force can be transmitted. When the handle 1 rotates under force, the pushing rod 3 forms pushing force on the acting surface 34 to drive the ratchet wheel 6 to rotate simultaneously, if the sliding surface 35 of the pushing rod 3 and the sliding guide surface 64 slide relatively when the handle 1 rotates reversely, a force capable of pushing the ratchet wheel 6 to rotate cannot be formed, and the ratchet wheel 6 cannot be driven to rotate together; at this time, the pawl 33 slides and rotates relatively to the ratchet 6, and when the handle 1 drives the pawl 33 to rotate by a certain angle, the pawl 33 can enter the next gear tooth 62 of the ratchet 6 through the thrust action of the elastic member 2, so that a cycle is formed to realize the function of the ratchet wrench.

The switching output rod 8 is also included, the cross section of the switching output rod 8 is regular hexagonal, and is matched with the second operation through hole 61; the ratchet 6 rotates simultaneously with the transfer output lever 8. One end of the switching output rod 8 can be in a straight shape or a cross shape or a regular hexagonal prism, and the switching output rod 8 can be used for operating pan head screws, bolts and the like.

In order to adapt to small space operation, the maximum size of the fixed seat 5 is 9.5mm, and the fixed seat can be suitable for occasions with the distance from the side wall to the center being more than or equal to 4.5mm, can be used for loading and unloading a wrench of a hexagonal screw in 2.5, has the general effect of a ratchet wrench, reduces the labor intensity of operators and improves the production efficiency.

The ratchet 6 is small in size, the number of teeth 62 is 6, and the minimum rotation angle between teeth is 60 DEG for strength

The ratchet wrench works as follows:

the handle 1 is held by hand, the switching output rod 8 is inserted into a hexagonal groove of a hexagonal screw to be screwed, the initial state of the wrench is shown in fig. 11, the handle 1 is rotated according to the screwing direction, the screw is screwed in the screwing process, after the handle 1 is rotated to be close to the limit space position, the handle 1 is lightly pressed, proper pretightening force is applied to the screw to prevent the screw from rotating, the handle 1 is rotated anticlockwise, the pawl 33 of the pushing rod 3 rotates relative to the ratchet 6 in the rotation process, the elastic piece 2 is compressed, after 60 degrees of rotation, the pawl 33 of the pushing rod 3 is pushed into the tooth form of the ratchet 6 under the action of the elastic piece 2 to reach the state shown in fig. 11, and the action is circulated until the screwing of the screw is completed.

The foregoing has shown and described the basic principles, main features and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. The ratchet wrench comprises a handle (1), a fixed seat (5) and a ratchet (6), wherein the handle (1) and the fixed seat (5) are detachably connected into a whole, the fixed seat (5) is provided with a ratchet mounting hole (55), and the ratchet (6) is rotatably mounted in the ratchet mounting hole (55); the ratchet wheel (6) is provided with a second operation through hole (61), and a first operation through hole (57) is arranged at the position corresponding to the second operation through hole (61) of the fixing seat (5) so that the threaded fastener can extend into the second operation through hole (61); the method is characterized in that: the inside of the handle (1) is provided with a guide hole (12), the inside of the fixed seat (5) is provided with a communication hole (54), and the communication hole (54) is communicated with the ratchet wheel mounting hole (55) and the guide hole (12);

the device also comprises a jacking rod (3), wherein the jacking rod (3) comprises a guide part (31) and a pawl (33) which are connected into a whole; the guide part (31) is arranged in the guide hole (12) in a sliding manner and cannot rotate relative to the guide hole (12), and an elastic piece (2) is arranged between one end of the guide part (31) deviating from the pawl (33) and the inner wall of the guide hole (12); the pawl (33) is slidably arranged in the communication hole (54) and meshed with the ratchet wheel (6);

after the threaded fastener is clamped with the ratchet wheel (6), under the combined action of the elastic piece (2) and the pushing rod (3), the ratchet wheel (6) can only rotate along one direction with the handle (1), and when the handle (1) reversely rotates, the pawl (33) rotates relative to the ratchet wheel (6).

2. A ratchet wrench as claimed in claim 1, wherein: the handle (1) is cylindrical; the outer wall of the handle (1) is provided with a first positioning part (11), the outer wall of the fixing seat (5) is provided with a second positioning part (51), and the first positioning part (11) is matched with the second positioning part (51) to be positioned when the handle (1) and the fixing seat (5) are assembled.

3. A ratchet wrench as claimed in claim 1, wherein: the outer wall of the guide part (31) is provided with a guide groove (32), and the guide groove (32) extends along the axial direction of the pushing rod (3); the handle (1) is provided with a limit screw (4), the inner end of the limit screw (4) stretches into the guide groove (32), the guide groove (32) is in clearance fit with the limit screw (4), and the guide part (31) is allowed to slide along the guide groove (32) and cannot rotate.

4. A ratchet wrench as claimed in claim 3, wherein: screw holes (16) and screwed plug holes (15) are machined in the side walls of the guide holes (12), and the screw holes (16) and the screwed plug holes (15) are coaxially arranged; the limit screw (4) is in threaded connection with the screw hole (16), and the plug hole (15) is internally in threaded connection with a plug.

5. A ratchet wrench as claimed in claim 1, wherein: the inside of the handle (1) is also provided with a process hole (14) and a connecting hole (13), and the process hole (14) and the connecting hole (13) are respectively opened on two end surfaces of the handle (1); the process hole (14), the guide hole (12) and the connecting hole (13) are sequentially communicated, and the connecting hole (13) is used for realizing connection between the fixing seat (5) and the handle (1).

6. A ratchet wrench as claimed in claim 5, wherein: the fixing seat (5) comprises a fixed connection part (52), a switching part (53) and a ratchet wheel installation part (56); the switching part (53) is positioned between the fixed connection part (52) and the ratchet wheel installation part (56) and is used for connecting the fixed connection part (52) and the ratchet wheel installation part (56); the fixed connection part (52) is cylindrical, external threads are machined on the outer side wall, internal threads are machined on the inner wall of the connection hole (13), and the fixed connection part (52) is screwed with the connection hole (13).

7. A ratchet wrench as claimed in claim 5, wherein: the ratchet installation hole (55) is positioned in the ratchet installation part (56), an opening is formed in one side surface of the ratchet installation part (56), a cover plate (7) is covered on the opening, and a third operation through hole (71) is formed in the cover plate (7); the third operation through hole (71) is provided coaxially with the first operation through hole (57).

8. A ratchet wrench as claimed in claim 1, wherein: the ratchet wheel is characterized by further comprising a switching output rod (8), wherein the switching output rod (8) is matched with the second operation through hole (61), and synchronous rotation of the switching output rod (8) and the ratchet wheel (6) is achieved.

9. A ratchet wrench as claimed in claim 1, wherein: the outer circumferential surface of the ratchet wheel (6) is uniformly distributed with 6 gear teeth (62).

10. A ratchet wrench as claimed in claim 1, wherein: the maximum size of the outer outline of the fixed seat (5) is smaller than or equal to 9.5mm.