Combined wrench

Abstract

A combined wrench belongs to the technical field of hardware tools and comprises a ratchet wrench head and a handle which are rotatably connected, and further comprises a sleeve assembly used in cooperation with the ratchet wrench, the sleeve assembly comprises a wrench head sleeve and a connecting sleeve set, and the connecting sleeve set is detachably installed at the top of the wrench head sleeve. Two adjustable wrenches are movably mounted at the bottom of the wrench sleeve, connecting columns of prism structures are fixedly arranged at the tops of the wrench sleeve and the connecting sleeve set, the adjustable wrenches can adapt to bolts of different specifications, the distance between the ratchet wrench and the bolts can be flexibly changed by using the sleeve assembly and the ratchet wrench, and use is convenient. The ratchet wrench is used, the position of the wrench does not need to be adjusted again when the bolt is tightened, the ratchet wrench head is rotationally connected with the handle, the operation flexibility is further improved so as to adapt to different operation spaces, the overall adaptability is higher, and use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to hardware tool technical field, in particular to a combination wrench. BACKGROUND

[0002] Bolt connection is a commonly used mechanical connection mode, which is widely used in engineering structures, especially in steel structures. The basic principle of bolt connection relies on the pre-tightening force generated after the screw rod part of the bolt passes through the through hole of the connected part and is tightened with the nut, to realize the close fit and fixation between the connected parts.

[0003] The commonly used tool in bolt connection is a wrench, among which, the ratchet wrench is a high-efficiency manual screw tightening tool, which realizes one-way continuous rotation by using ratchet mechanism, and can freely slide in the other direction. This design makes the ratchet wrench not need to frequently change the clamping position like ordinary wrenches to adapt to different work scene requirements when tightening or loosening bolts and nuts, thereby improving the work efficiency.

[0004] The existing ratchet wrench realizes the tightening of bolts / nuts through a sleeve, but the existing sleeve has limited length and cannot adapt to the tightening requirements of bolts / nuts of different depths. When the distance between the wrench and the bolt is far due to space limitation, the distance between the bolt / nut and the ratchet wrench is too large, the sleeve cannot effectively contact the bolt / nut, thereby causing the bolt / nut cannot be tightened, and the overall adaptability is limited. In addition, the existing sleeve is only suitable for one type of bolt / nut, and in actual work, different types of sleeves need to be equipped, which is inconvenient to carry and use. TECHNICAL CONTENT

[0005] To solve the technical problem of the existing ratchet wrench and its matching sleeve in the background art, the overall adaptability is limited, the utility model provides a combination wrench.

[0006] The technical scheme of the utility model is as follows:

[0007] The utility model provides a kind of combined wrench, including ratchet wrench, ratchet wrench includes the ratchet wrench head and handle of rotation connection, further include sleeve assembly used in conjunction with ratchet wrench, sleeve assembly includes wrench head sleeve and connecting sleeve group, connecting sleeve group is detachably installed at the top of wrench head sleeve, the bottom of wrench head sleeve movably installs two adjustable wrench head, the top of wrench head sleeve and connecting sleeve group is fixed with the connecting column of prismatic structure, the setting of adjustable wrench head, different specifications of bolt can be adapted, the distance of ratchet wrench and bolt can be flexibly changed using sleeve assembly and ratchet wrench, it is convenient to use, the position of wrench does not need to be re-adjusted when using ratchet wrench to tighten bolt, the rotation connection of ratchet wrench head and handle, further improve the flexibility of operation, to adapt to different operating space, overall adaptability is stronger, use is more convenient.

[0008] Preferably, the wrench head sleeve is connected to the two oppositely arranged adjustable wrench heads by a bidirectional screw rod, the two ends of the bidirectional screw rod are provided with external threads with opposite rotation directions, one end of the bidirectional screw rod penetrates through the outer wall of the wrench head sleeve and extends outward, the two oppositely arranged adjustable wrench heads can be driven to move closer to or farther away from each other by twisting the bidirectional screw rod, so as to adapt to different specifications of bolts / nuts.

[0009] Preferably, the top of the wrench head sleeve is open, a first connecting column is fixedly arranged at the central position of the top of the wrench head sleeve, the top of the first connecting column extends outward from the wrench head sleeve, for quick connection with the connecting sleeve group, while ensuring the force transmission between the connecting sleeve group and the wrench head sleeve.

[0010] Preferably, the connecting sleeve group includes a plurality of connecting sleeves that are axially connected in sequence and can be detached, the connecting sleeve has an upper opening structure, a second connecting column is fixedly arranged at the central position of the top of the connecting sleeve, a connecting hole is formed at the central position of the bottom of the connecting sleeve, the cross-sectional shape of the connecting hole is the same as that of the first connecting column / second connecting column, the connecting sleeve can be axially lengthened according to the demand for the wrench head sleeve, the distance between the ratchet wrench and the bolt can be flexibly changed, and different working scene requirements can be met.

[0011] Preferably, the wrench head sleeve and the connecting sleeve, and the adjacent connecting sleeves are all inserted from top to bottom, the adjacent sleeves are connected by a spring limiting mechanism, which effectively limits the connection firmness between the wrench head sleeve and the connecting sleeve, and the adjacent connecting sleeves, and facilitates the overall removal of the sleeve assembly after use.

[0012] Preferably, the spring limiting mechanism comprises a spring pin, the upper opening side wall of the connecting sleeve and the handle sleeve are slidably provided with the spring pin, the axial direction of the spring pin is perpendicular to the axial direction of the corresponding sleeve, the bottom outer wall of the connecting sleeve is provided with a first limiting hole, and the spring pin is inserted into the first limiting hole.

[0013] Preferably, one side of the ratchet handle is fixedly provided with a connecting part, one end of the handle is fixedly provided with a mounting part, the connecting part is rotationally connected with the mounting part through a rotating shaft, a plurality of second limiting holes are arranged on the connecting part and are distributed at the circumferential side of the rotating shaft, a bolt hole is arranged on the mounting part and is connected with the coaxial second limiting hole through a bolt, and the relative angle between the ratchet handle and the handle can be quickly locked after the ratchet handle is adjusted, thereby facilitating subsequent use of the ratchet handle.

[0014] Preferably, a limiting plate is slidably arranged on the mounting part, the top of the limiting plate is connected with a spring through a connecting shaft, the connecting shaft extends out of the mounting part, the limiting plate is an arc-shaped plate structure, one side of the limiting plate used for colliding with the end of the bolt is an arc-shaped transition surface, a limiting groove is arranged on the outer wall of the bolt along the circumferential direction, the bolt can be limited by the limiting plate, and automatic ejection of the bolt is avoided, the arc-shaped transition surface facilitates jacking of the limiting plate by the bolt, and insertion of the bolt is facilitated.

[0015] Through the above technical scheme, the utility model has the advantages that:

[0016] 1. The bottom of the handle sleeve is movably provided with two adjustable handles, the adjustable handles can adapt to different specifications of bolts, the sleeve assembly is used in cooperation with the ratchet wrench to flexibly change the distance between the ratchet wrench and the bolt, use is facilitated, the use of the ratchet wrench does not require re-adjustment of the position of the wrench when tightening the bolt, the ratchet handle is rotationally connected with the handle, and the flexibility of operation is further improved to adapt to different operation spaces, the overall adaptability is stronger, and use is more convenient.

[0017] 2. The adjacent sleeves are connected through the connecting column and the connecting hole of the prism structure, the relative rotation between the adjacent sleeves is effectively limited while quick connection is realized, force transmission is facilitated, and the bolt is tightened.

[0018] 3. The handle sleeve and the connecting sleeve are up-down inserted, and the adjacent connecting sleeves are up-down inserted, the adjacent sleeves are connected through the spring limiting mechanism, the connection firmness between the handle sleeve and the connecting sleeve and the adjacent connecting sleeves is effectively limited, and the sleeve assembly is conveniently taken out as a whole after use. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the technical scheme of the utility model more apparent and easy to understand, the following will be a brief introduction to the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the patent are within the scope of the patent protection.

[0020] Figure 1 It is a structural schematic view of the ratchet wrench according to one or more embodiments of the utility model;

[0021] Figure 2 It is a structural schematic view of the wrench sleeve according to one or more embodiments of the utility model;

[0022] Figure 3 It is a structural schematic view of the connecting sleeve according to one or more embodiments of the utility model;

[0023] Figure 4 It is a sectional structural schematic view of the ratchet wrench and handle connecting position according to one or more embodiments of the utility model;

[0024] The components represented by the respective reference numerals in the drawings are as follows:

[0025] 1, ratchet wrench;2, handle;3, wrench sleeve;4, connecting sleeve;5, adjustable wrench;6, bidirectional screw;7, first connecting column;8, spring pin;9, connecting hole;10, second connecting column;11, first limiting hole;12, connecting part;13, rotating shaft;14, bolt;15, limiting plate;16, connecting shaft;17, spring. DETAILED DESCRIPTION

[0026] In order to make the technical scheme of the utility model more apparent and easy to understand, the following will be a brief introduction to the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the patent are within the scope of the patent protection.

[0027] In a typical embodiment of the utility model, a combination wrench is provided, comprising: a ratchet wrench and a sleeve assembly, the ratchet wrench is tightened by the sleeve assembly.

[0028] The sleeve assembly comprises a wrench sleeve 3 and a connecting sleeve group, the wrench sleeve 3 is used for connecting with the bolt / nut, and the connecting sleeve group is detachably installed on the top of the wrench sleeve 3 to lengthen the axial length of the wrench sleeve 3, so as to adapt to different depth operation spaces.

[0029] As Figure 2 shown, the bottom of the wrench sleeve 3 is movably mounted with two adjustable wrenches 5, and the inside of the wrench sleeve 3 is rotatably provided with a bidirectional screw rod 6, the two ends of the bidirectional screw rod 6 are provided with external threads in opposite directions, one end of the bidirectional screw rod 6 penetrates the outer wall of the wrench sleeve 3 and extends outward, in order to facilitate the screwing of the bidirectional screw rod 6, the extending end of the bidirectional screw rod 6 is fixedly connected with an external hex head, the top end of the two adjustable wrenches 5 is fixedly provided with a rectangular connector, the bottom of the wrench sleeve 3 is provided with a guide groove, the guide groove is parallel to the horizontally arranged bidirectional screw rod 6, the connector of the adjustable wrench 5 vertically penetrates the guide groove and is threadedly connected with the bidirectional screw rod 6, so that by screwing the bidirectional screw rod 6, the two oppositely arranged adjustable wrenches 5 can be driven to approach or move away from each other to adapt to different specifications of bolts / nuts.

[0030] The top of the wrench sleeve 3 is open, and a first connecting column 7 is fixedly arranged at the center position of the top of the wrench sleeve 3, the first connecting column 7 is coaxially arranged with the wrench sleeve 3, and the top of the first connecting column 7 extends outwardly from the wrench sleeve 3 for insertion with the connecting sleeve group, the first connecting column 7 is a prism structure, such as a quadrangular prism, a pentagonal prism, a hexagonal prism, etc.

[0031] The connecting sleeve group includes a plurality of connecting sleeves 4 which are axially and sequentially detachably connected, and the adjacent connecting sleeves 4 are inserted and arranged from top to bottom, specifically, the outer diameter of the bottom of the lowermost connecting sleeve 4 is the same as the inner diameter of the top opening of the wrench sleeve 3, so that the bottom of the lowermost connecting sleeve 4 is inserted into the top opening of the wrench sleeve 3, and the size relationship between the other layers of connecting sleeves 4 is that the outer diameter gradually decreases in the direction from bottom to top, so as to realize the insertion between the adjacent connecting sleeves 4, the connecting mode of gradually decreasing the outer diameter not only can reduce the use of materials and reduce the cost, but also can enhance the structural stability and facilitate the assembly, and when inserted, the upper connecting sleeve 4 can reduce the obstruction to the line of sight.

[0032] As Figure 3 shown, the connecting sleeve 4 is also an open structure at the top, and a second connecting column 10 is fixedly arranged at the center position of the top of the connecting sleeve 4, the second connecting column 10 is used for connecting between two adjacent connecting sleeves 4, the second connecting column 10 is also a prism structure, and a connecting hole 9 is arranged at the center position of the bottom of the connecting sleeve 4 for insertion of the first connecting column 7 / second connecting column 10, the cross-sectional shape of the connecting hole 9 is the same as that of the first connecting column 7 / second connecting column 10, so as to effectively limit the rotation between the wrench sleeve 3 and the connecting sleeve 4 and between the adjacent connecting sleeves 4, so as to facilitate the transmission of force.

[0033] In order to improve the connection stability between the wrench sleeve 3 and the connecting sleeve 4 and between adjacent connecting sleeves 4, so as to facilitate the removal of the wrench sleeve 3 and the connecting sleeve 4 from the operation space, the adjacent sleeves are also connected through a spring limiting mechanism.

[0034] Specifically, a mounting hole is formed in the side wall of the upper opening of the wrench sleeve 3, and a spring pin 8 is slidably arranged in the mounting hole. The axial direction of the spring pin 8 is perpendicular to the axial direction of the wrench sleeve 3. One end of the spring pin 8 is located in the wrench sleeve 3 for contacting the outer wall of the connecting sleeve 4. The other end of the spring pin 8 extends out of the wrench sleeve 3, so as to manually pull the spring pin 8 and cancel the locking between the wrench sleeve 3 and the connecting sleeve 4.

[0035] It can be understood that the spring pin 8 is a known structure, such as a transversely moving pin shaft on which a return spring is sleeved and which is integrally installed in the mounting hole. The specific structure is not limited here.

[0036] A first limiting hole 11 is formed in the bottom outer wall of the connecting sleeve 4 for the insertion of the spring pin 8, thereby limiting the axial movement between adjacent sleeves. A mounting hole is also formed in the side wall of the upper opening of the connecting sleeve 4, and a spring pin 8 is also slidably arranged in the mounting hole of the upper opening of the connecting sleeve 4 for locking and fixing between adjacent connecting sleeves 4.

[0037] As shown in Figure 1 , the ratchet wrench comprises a ratchet head 1 and a handle 2. The ratchet head 1 is rotationally connected with the handle 2, and the included angle between the ratchet head 1 and the handle 2 can be adjusted according to requirements, thereby adapting to different operation space requirements.

[0038] It can be understood that the ratchet head 1 is a known structure, and the specific structure form is not described in detail here. The ratchet head 1 is provided with a plug hole for connecting the first connecting column 7 / second connecting column 10. The cross-sectional shape of the plug hole matches the second connecting column 10, so as to facilitate force transmission.

[0039] As shown in Figure 4 , one side of the ratchet head 1 is fixedly provided with a connecting portion 12. A shaft hole is formed in the connecting portion 12 for the installation of a shaft 13. One end of the handle 2 is fixedly provided with a mounting portion. A shaft hole is also formed in the mounting portion. The connecting portion 12 is rotationally connected with the mounting portion through the shaft 13. In order to facilitate the locking of the angle between the ratchet head 1 and the handle 2, a plurality of second limiting holes are also arranged on the connecting portion 12. The second limiting holes are distributed on the circumferential side of the shaft hole of the mounting portion 12. A latch hole is also formed in the mounting portion of the end portion of the handle 2 for the installation of a latch 14. When the latch hole and the corresponding second limiting hole are coaxially aligned, the latch 14 is inserted, and the relative angle between the ratchet head 1 and the handle 2 can be quickly locked.

[0040] A limiting plate 15 is also slidably arranged on the mounting portion of the end of the handle 2. Specifically, a sliding groove is formed on the mounting portion, the sliding groove is perpendicular to the pin hole, the top of the limiting plate 15 is fixedly connected with a connecting shaft 16, the connecting shaft 16 is slidably arranged in the sliding groove, and the top end of the connecting shaft 16 outwardly extends from the mounting portion, so as to manually pull the connecting shaft 16. A spring 17 is sleeved on the connecting shaft 16, one end of the spring 17 is fixedly connected with the connecting shaft 16, and the other end is fixedly connected with the wall of the sliding groove, so as to drive the limiting plate 15 to quickly reset. The limiting plate 15 is an arc-shaped plate structure, and the side of the limiting plate 15 used for colliding with the end of the pin 14 is an arc-shaped transition surface, so as to facilitate the pin 14 to push the limiting plate 15. A limiting groove is formed on the outer wall of the pin 14 along the ring direction, so as to facilitate the insertion of the limiting plate 15, thereby limiting the axial movement of the pin 14, and preventing the pin 14 from being pulled out.

[0041] Specific working principle is:

[0042] According to the specification of the bolt / nut to be tightened, the distance between the two adjustable wrenches 5 is adjusted, then the wrench sleeve 3 is installed at the specified position, so that the adjustable wrenches 5 are clamped on both sides of the bolt / nut to be tightened, the ratchet wrench 1 is connected with the first connecting column 7, force is applied through the handle 2, and the bolt / nut is tightened by using the wrench sleeve 3; when the length of the wrench sleeve 3 needs to be lengthened, a specified number of connecting sleeves 4 are inserted into the top of the wrench sleeve 3 in the vertical direction in sequence, so that the adjacent sleeves are axially locked by using the cooperation of the spring pin 8 and the connecting hole 9, the ratchet wrench 1 is connected with the uppermost second connecting column 10, and the force is transmitted through the sleeve assembly; when the angle between the ratchet wrench 1 and the handle 2 needs to be adjusted due to space limitation, the connecting shaft 16 is manually pulled to cancel the limitation of the limiting plate 15 on the pin 14, the pin 14 is pulled out, the angle between the ratchet wrench 1 and the handle 2 is adjusted, the pin hole is aligned with the corresponding second limiting hole, after the adjustment is completed, the pin 14 is inserted into the pin hole again, and the connecting shaft 16 is pushed upward and moves during the insertion of the pin 14, and after the pin 14 is inserted in place, the limiting plate 15 is inserted into the limiting groove on the side wall of the pin 14 under the action of the spring 17, so as to realize the locking of the position.

[0043] In the embodiment, the ratchet wrench and the sleeve assembly are used in cooperation, which can adapt to different working scenes, such as narrow operation space, operation space with too large vertical distance, bolts / nuts of different specifications, etc., and the overall adaptability is stronger, and the use is more convenient.

[0044] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combination wrench, comprising: The ratchet wrench comprises a ratchet wrench head (1) and a handle (2) connected in rotation, and a sleeve assembly used in cooperation with the ratchet wrench, wherein the sleeve assembly comprises a wrench head sleeve (3) and a connecting sleeve group, the connecting sleeve group is detachably installed on the top of the wrench head sleeve (3), the bottom of the wrench head sleeve (3) movably installs two adjustable wrench heads (5), and the top of the wrench head sleeve (3) and the top of the connecting sleeve group are both fixedly provided with a connecting column in a prismatic structure.

2. The combination wrench of claim 1, wherein, The wrench head sleeve (3) is connected with the two oppositely arranged adjustable wrench heads (5) through a bidirectional screw rod (6), the two ends of the bidirectional screw rod (6) are provided with external threads in opposite directions, and one end of the bidirectional screw rod (6) penetrates through the outer wall of the wrench head sleeve (3) and extends outward.

3. The combination wrench of claim 1, wherein, The top of the wrench head sleeve (3) is open, a first connecting column (7) is fixedly arranged at the center position of the top of the wrench head sleeve (3), and the top of the first connecting column (7) extends outward from the wrench head sleeve (3).

4. The combination wrench of claim 3, wherein, The connecting sleeve group comprises a plurality of connecting sleeves (4) which are axially and sequentially detachably connected, the connecting sleeve (4) is of an upper opening structure, a second connecting column (10) is fixedly arranged at the center position of the top of the connecting sleeve (4), and a connecting hole (9) is arranged at the center position of the bottom of the connecting sleeve (4), wherein the cross-sectional shape of the connecting hole (9) is the same as that of the first connecting column (7) and the second connecting column (10).

5. The combination wrench of claim 4, wherein, The wrench head sleeve (3) and the connecting sleeve (4) and the adjacent connecting sleeves (4) are all connected in an upper-lower insertion mode, and the adjacent sleeves are connected through a spring (17) limiting mechanism.

6. The combination wrench of claim 5, wherein, The spring (17) limiting mechanism comprises a spring pin (8), the spring pin (8) is slidably arranged on the upper opening side wall of the wrench head sleeve (3) and the connecting sleeve (4), the axial direction of the spring pin (8) is perpendicular to the axial direction of the corresponding sleeve, a first limiting hole (11) is arranged on the outer wall of the bottom of the connecting sleeve (4), and the spring pin (8) is inserted into the first limiting hole (11).

7. The combination wrench of claim 1, wherein, One side of the ratchet wrench head (1) is fixedly provided with a connecting part (12), one end of the handle (2) is fixedly provided with a mounting part, the connecting part (12) is rotatably connected with the mounting part through a rotating shaft (13), a plurality of second limiting holes are arranged on the connecting part (12) and are distributed at the circumferential side of the rotating shaft (13), a bolt (14) hole is arranged on the mounting part, and the bolt (14) hole and the coaxial second limiting hole are connected through the bolt (14).

8. The combination wrench of claim 7, wherein, A limiting plate (15) is slidably arranged on the mounting part, the top of the limiting plate (15) is connected with a spring (17) through a connecting shaft (16), the connecting shaft (16) extends outward from the mounting part, the limiting plate (15) is an arc-shaped plate structure, one side of the limiting plate (15) for colliding with the end of the bolt (14) is an arc-shaped transition surface, and a limiting groove is arranged on the outer wall of the bolt (14) along the ring direction.

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