Bolt tightening tool

Abstract

The utility model discloses a bolt tightening tool, comprising a first sleeve and a second sleeve, wherein one end of the first sleeve is open and formed with a first sleeve opening for tightening the bolt, the other end of the first sleeve is closed, and a first limiting portion is formed on the inner circumference of the first sleeve; the outer circumference of the second sleeve has a second limiting portion adapted to the first limiting portion, and the second sleeve is accommodated in the first sleeve; one end of the second sleeve is open and formed with a second sleeve opening for tightening the bolt, and the first sleeve opening and the second sleeve opening face the same direction. The utility model can disassemble and assemble two bolts of different specifications, and under the action of the first limiting portion and the second limiting portion, the first sleeve and the second sleeve are coaxially arranged, thereby ensuring the coaxiality of the bolt when being tightened, and no shaking occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt fastening tools, and more specifically, to a bolt tightening tool. Background Art

[0002] Bolts are mechanical parts, mainly composed of a first sleeve and a screw. The screw is a cylindrical body with external threads, which is used to fasten and connect two parts with polygonal holes. In mechanical manufacturing and engineering construction, bolts are widely used for fixings that bear static and dynamic loads, such as the installation of automobile engines. Since bolts have high tensile strength and shear strength, they are often used to connect structural parts that bear large loads to ensure the stability and safety of the entire equipment. Bolts effectively prevent the loosening of the connecting sleeve by increasing friction and tightness, which is particularly important when mechanical equipment and structures may loosen during operation due to vibration, thermal expansion and contraction.

[0003] During the assembly of engine parts, some parts have bolts of different specifications, which requires operators to switch different tightening air guns when installing and tightening the same part. The engine fixture is a tooling type, and the three bolts on the top of the fixture have two specifications (10# and 15#). They need to be equipped with specific 10# and 15# sockets, and switch back and forth during the operation, which consumes a lot of man-hours.

[0004] Prior art CN216634170U discloses a universal socket for a wrench with a self-resetting top plate with elastic roots planted at the bottom of the inner cavity. The inner cavity belongs to a rectangular space, and the bottom surface of the inner cavity is also "fully planted" with self-resetting top plates with elastic roots. Each self-resetting top plate with elastic roots includes at least a top plate body located at the top and a self-resetting elastic root located at the bottom. Each top plate body is a thin plate made of a hard material that is not easy to break. The thickness of each self-resetting elastic root is not greater than the thickness of the top plate body above it, and its bottom end is "planted" (i.e., inserted and fastened to) the bottom surface of the inner cavity. This technical solution has the two advantages of "being able to disassemble and assemble various bolts" and "being able to clamp various bolt heads". In actual use, when the bolt is inserted into the first sleeve, it cannot be ensured that it is inserted into the middle position of the sleeve. During the tightening process, it shakes greatly, and the sleeve is easy to detach from the first sleeve of the bolt, and it is easy to cause the bolt to break. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a bolt tightening tool, which utilizes a first limiting portion and a second limiting portion to allow a first sleeve and a second sleeve to rotate coaxially at the same time, wherein the end of the first sleeve is used to tighten one type of bolt, and the end of the second sleeve is used to tighten another type of bolt. During the tightening process, the first sleeve and the second sleeve do not interfere with each other, and the first sleeve assembly and the second sleeve are coaxial, thereby ensuring the coaxiality of the bolt during tightening and preventing shaking.

[0006] To achieve the above-mentioned purpose, a bolt tightening tool comprises a first sleeve and a second sleeve, wherein one end of the first sleeve is open and formed with a first sleeve opening for tightening the bolt, the other end of the first sleeve is closed, and a first limiting portion is formed on the inner circumference of the first sleeve; the outer circumference of the second sleeve has a second limiting portion adapted to the first limiting portion, and the second sleeve is accommodated in the first sleeve; one end of the second sleeve is open and formed with a second sleeve opening for tightening the bolt, the first sleeve opening and the second sleeve opening are oriented in the same direction, the other end of the second sleeve extends and is formed with a guide column, the guide column slides out of the closed end of the first sleeve, a reset element is sleeved on the guide column located in the first sleeve, and one end of the guide column exposed from the first sleeve is slidably connected to a connecting sleeve, the connecting sleeve is formed with a third limiting portion at the connection with the guide column, and the guide column is formed with a fourth limiting portion adapted to the third limiting portion at the connection with the connecting sleeve.

[0007] In the present technical solution, the tooling is put on the bolt, and when the bolt is matched with the first sleeve, the bolt pushes the second sleeve into the first sleeve, so that the bolt is completely embedded in the first sleeve. When the bolt is matched with the second sleeve, the bolt is completely embedded in the first sleeve. Then the tooling is rotated to drive the first sleeve and the second sleeve to rotate at the same time, so that the bolt can be removed or installed. The second sleeve is sleeved on the inner wall of the first sleeve so that the first sleeve and the second sleeve are coaxially arranged, thereby ensuring the coaxiality of the bolt when it is tightened and no deviation occurs.

[0008] As a preferred solution, in order to guide the second sleeve to slide into the first sleeve, the guide column is vertically arranged at the center of the end surface of the second sleeve, one end of the reset element is connected to one end of the first sleeve, and the other end of the reset element is connected to the closed inner circumferential surface of the first sleeve. The reset element can reset the contracted second sleeve so that the first sleeve opening and the second sleeve opening are flush, and the guide column can guide the second sleeve to slide along the axial direction of the first sleeve to avoid the second sleeve from being offset and stuck.

[0009] As a preferred solution, the guide column is a polygonal column, and the polygonal hole is a polygonal hole. The structure of the polygonal column and the polygonal hole can limit the guide column to move only along the axial direction but not to rotate.

[0010] As a preferred solution, a limit block is provided at one end of the guide column away from the second sleeve, and the limit block is accommodated in the connecting sleeve. The limit block prevents the guide column from sliding out of the polygonal hole, thereby preventing the second sleeve from sliding out of the first sleeve assembly.

[0011] As a preferred solution, in order to avoid the second sleeve interfering with the first sleeve assembly in tightening the bolt, the length of the first sleeve is equal to the sum of the lengths of the guide column and the second sleeve, the length of the connecting sleeve is equal to the length of the guide column, and the guide column extends into the connecting sleeve through the polygonal hole.

[0012] As a preferred solution, magnets are embedded in the first set of openings and the second set of openings respectively, and the magnets can absorb the bolts tightly to facilitate the disassembly and assembly of the bolts.

[0013] As a preferred solution, the first sleeve and the second sleeve are hexagon sockets for tightening two different types of bolts.

[0014] As a preferred solution, the driving handle includes a main body, a driving motor, a switch button and a rotating shaft. The driving motor is arranged in the main body, the rotating shaft is rotatably connected to one end of the main body and is connected to the driving shaft of the driving motor, the other end of the rotating shaft is connected to the third sleeve, the main body is provided with a gripping portion, the switch button is arranged on the gripping portion and is electrically connected to the driving motor, and the switch button can control the forward and reverse rotation of the driving motor to realize the disassembly and assembly of the bolt.

[0015] As a preferred solution, a torque sensor is provided in the main body, and the torque sensor is electrically connected to the drive motor. In order to avoid over-tightening of the bolts, the torque sensor can be used to ensure that the tightening force of the bolts is consistent and meets the assembly standard.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The tooling of the utility model accommodates the second sleeve in the first sleeve, and the second sleeve can be pressed into the first sleeve assembly without interfering with the operation of the first sleeve. The first sleeve and the second sleeve are coaxially arranged through the first limiting part and the second limiting part, thereby ensuring the coaxiality when the bolt is tightened.

[0018] 2. Two types of bolts can be screwed through the first sleeve and the second sleeve, avoiding frequent switching of tightening tools and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the bolt tightening tool of the utility model;

[0020] Figure 2 is a schematic diagram of the structure of the first sleeve and the second sleeve;

[0021] Figure 3 yes Figure 2 Explosion diagram.

[0022] In the figure: first sleeve 1; connecting sleeve 2; polygonal hole 201; third sleeve 3; second sleeve 4; guide column 5; reset element 6; limit block 7; main body 8; rotating shaft 801; gripping part 802; switch button 803; positioning ring 9. DETAILED DESCRIPTION

[0023] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0026] Embodiment 1:

[0027] like Figures 1 to 3 As shown, a bolt tightening tool comprises a first sleeve 1 and a second sleeve 4, wherein one end of the first sleeve 1 is open and is formed with a first sleeve opening for tightening a bolt, the other end of the first sleeve 1 is closed, and a first limiting portion is formed on the inner circumference of the first sleeve 1; the outer circumference of the second sleeve 4 has a second limiting portion adapted to the first limiting portion, and the second sleeve 4 is accommodated in the first sleeve 1; one end of the second sleeve is open and is formed with a second sleeve opening for tightening a bolt, the first sleeve opening and the second sleeve opening are oriented in the same direction, the other end of the second sleeve extends and is formed with a guide column 5, the guide column 5 slides out of the closed end of the first sleeve 1, a reset element 6 is sleeved on the guide column 5 located in the first sleeve 1, and one end of the guide column 5 exposed from the first sleeve 1 is slidably connected with a connecting sleeve 2, the connecting sleeve 2 is formed with a third limiting portion at the connection with the guide column 5, and the guide column 5 is formed with a fourth limiting portion adapted to the third limiting portion at the connection with the connecting sleeve 2.

[0028] In this embodiment, the first sleeve assembly is an internal hexagon socket, which is suitable for 15# bolts, and the second sleeve is an internal hexagon socket suitable for 10# bolts. When the first sleeve 1 rotates, under the limitation of the first limit part and the second limit part, the second sleeve 4 will rotate immediately without slipping, and the first limit part and the second limit part make the first sleeve 1 and the second sleeve 4 coaxially arranged, which can ensure the coaxial rotation of the bolt when tightening the bolt, and the bolt will not shake. When the second sleeve 4 completes the tightening work, the reset element 6 pushes the second sleeve 4 to reset. In this reset state, the ends of the first sleeve 1 and the second sleeve 4 are flush.

[0029] Specifically, the guide column 5 is vertically arranged at the center of the end surface of the second sleeve 4 , one end of the reset element 6 is connected to one end of the first sleeve 1 , and the other end of the reset element 6 is connected to the closed inner circumference of the first sleeve 1 .

[0030] In this embodiment, the reset element 6 is a spring. When the second sleeve 4 is retracted into the first sleeve 1, the spring is compressed. When the first sleeve 1 is used up, the second sleeve 4 is extended and reset under the action of the spring.

[0031] Specifically, the third limiting portion is a polygonal hole, the fourth limiting portion is a polygonal cylinder, the polygonal hole is inserted into the polygonal cylinder, the reset element 6 is sleeved on the guide column 5, and a limiting block 7 is provided at one end of the guide column 5 away from the second sleeve 4, and the limiting block 7 is accommodated in the connecting sleeve 2.

[0032] In this embodiment, after the first sleeve 1 and the connecting sleeve 2 are welded, the guide column 5 is welded to the center point of the second sleeve 4, the reset element is sleeved on the guide column 5, and then one end of the guide column 5 is passed through the polygonal hole 201, and then an upper limit block 7 is welded at one end of the guide column 5 to prevent the second sleeve 4 from falling out.

[0033] In this embodiment, the guide column 5 is a quadrangular prism, and the polygonal hole 201 is a quadrilateral through hole. When the second sleeve 4 is screwing, the guide column 5 does not rotate under the limitation of the polygonal hole 201, and the polygonal hole 201 can provide a reaction force to the guide column 5, so that the force of the second sleeve 4 is balanced.

[0034] The length of the first sleeve 1 is equal to the sum of the lengths of the guide column 5 and the second sleeve 4 , and the length of the connecting sleeve 2 is equal to the length of the guide column 5 .

[0035] In this embodiment, the second sleeve 2 is pushed outward under the tension of the reset element 6 , and when the limit block 7 at the end of the guide column 5 is pressed against the polygonal hole 201 , the end of the second sleeve 2 is flush with the end of the first sleeve 1 .

[0036] In this embodiment, the ends of the first sleeve 1 and the second sleeve 4 are chamfered so that the bolts can enter them more easily.

[0037] Specifically, one end of the connecting sleeve 2 away from the first sleeve 1 is connected to the third sleeve 3, and one end of the third sleeve 3 away from the connecting sleeve 2 is connected to a driving handle for driving the third sleeve 3 to rotate.

[0038] In this embodiment, if Figure 3 As shown, the first sleeve 1, the connecting sleeve 2 and the third sleeve 3 are first fixed by the positioning ring 9 in sequence to ensure their coaxiality, and then welded in sequence.

[0039] Specifically, the driving handle includes a main body 8, a driving motor, a switch button 803 and a rotating shaft 801. The driving motor is arranged in the main body 8. The rotating shaft 801 is rotatably connected to one end of the main body 8 and is connected to the driving shaft of the driving motor. The other end of the rotating shaft 801 is connected to the third sleeve 3. The main body 8 is provided with a gripping portion 802. The switch button 803 is arranged on the gripping portion 802 and is electrically connected to the driving motor.

[0040] In this embodiment, the switch button 803 has three gears, which correspond to the forward rotation, stop rotation and reverse rotation of the rotating shaft 801, respectively, thereby realizing the automatic disassembly and tightening of the bolts. The driving shaft of the driving motor is connected to the reduction gear, which is in turn connected to the rotating shaft 801. The reduction gear can increase the torque of the tooling of the utility model. In addition to using the driving motor to drive the rotating shaft 801 to rotate, pneumatic drive can also be used.

[0041] Embodiment 2:

[0042] This embodiment is similar to Embodiment 1, except that, in this embodiment, magnets are embedded in the first set of openings and the second set of openings, respectively.

[0043] In this embodiment, the first sleeve 1 and the second sleeve 4 can absorb the bolts through magnets, thereby avoiding the need to manually remove the bolts in a small space after unscrewing the bolts.

[0044] Embodiment 3:

[0045] This embodiment is similar to the embodiment 1, except that, in this embodiment, the third sleeve 3 is provided with a mounting hole adapted to the rotating shaft 801, the side wall of the rotating shaft 801 is provided with a spring sheet, and the mounting hole is provided with a slot for the spring sheet to be engaged.

[0046] In this embodiment, the end of the rotating shaft 801 can be a four-cornered column, which can prevent it from slipping with the third sleeve 3 when the rotating shaft 801 rotates. By setting the spring piece, the third sleeve 3 can be prevented from separating from the rotating shaft 801, and it is also convenient to disassemble the third sleeve 3 and the rotating shaft 801.

[0047] Embodiment 4:

[0048] This embodiment is similar to Embodiment 1, except that, in this embodiment, a torque sensor is provided inside the main body 8, and the torque sensor is electrically connected to the driving motor.

[0049] In this embodiment, the torque sensor can detect the torsional moment perception on various rotating or non-rotating mechanical parts. The torque sensor converts the physical change of torque into an accurate electrical signal. The torque sensor can be used in the manufacture of viscometers, electric (pneumatic, hydraulic) torque wrenches. It has the advantages of high precision, fast frequency response, good reliability, and long life. The torque sensor is used to detect the torque value of the rotating shaft 801. It only works during the tightening process of the bolt. During the tightening process of the bolt, when the bolt is tightened to the torque that meets the assembly requirements, the torque sensor controls the drive motor to stop working. At the same time, the torque threshold of the torque sensor can be set according to the assembly needs to avoid the bolt from loosening or over-tightening and breaking.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0051] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A bolt tightening tool, characterized in that: The invention comprises a first sleeve (1) and a second sleeve (4), wherein one end of the first sleeve (1) is open and is provided with a first sleeve opening for tightening a bolt, and the other end of the first sleeve (1) is closed, and a first limiting portion is formed on the inner circumference of the first sleeve (1); the outer circumference of the second sleeve (4) has a second limiting portion adapted to the first limiting portion, and the second sleeve (4) is accommodated in the first sleeve (1); one end of the second sleeve is open and is provided with a second sleeve opening for tightening a bolt, and the first sleeve opening and the second sleeve opening face the same direction, and the The other end of the second sleeve extends and forms a guide column (5), the guide column (5) slides out of the closed end of the first sleeve (1), a reset element (6) is sleeved on the guide column (5) located in the first sleeve (1), and the end of the guide column (5) exposed from the first sleeve (1) is slidably connected to the connecting sleeve (2), the connecting sleeve (2) forms a third limiting portion at the connection with the guide column (5), and the guide column (5) forms a fourth limiting portion adapted to the third limiting portion at the connection with the connecting sleeve (2).

2. A bolt tightening tool according to claim 1, characterized in that: The guide column (5) is vertically arranged at the center of the end surface of the second sleeve (4), one end of the reset element (6) is connected to one end of the first sleeve (1), and the other end of the reset element (6) is connected to the closed inner circumference of the first sleeve (1).

3. The bolt tightening tool according to claim 1, characterized in that: The third limiting portion is a polygonal hole, the fourth limiting portion is a polygonal column, and the polygonal hole is sleeved on the polygonal column.

4. A bolt tightening tool according to claim 3, characterized in that: A limit block (7) is provided at one end of the guide column (5) away from the second sleeve (4), and the limit block (7) is accommodated in the connecting sleeve (2).

5. The bolt tightening tool according to claim 1, characterized in that: The length of the first sleeve (1) is equal to the sum of the lengths of the guide column (5) and the second sleeve (4), and the length of the connecting sleeve (2) is equal to the length of the guide column (5).

6. The bolt tightening tool according to claim 1, characterized in that: Magnets are embedded in the first set of openings and the second set of openings respectively.

7. A bolt tightening tool according to any one of claims 1 to 6, characterized in that: The first set of openings and the second set of openings are respectively hexagon sockets for tightening two different types of bolts.

8. The bolt tightening tool according to claim 1, characterized in that: The end of the connecting sleeve (2) away from the first sleeve (1) is connected to the third sleeve (3), and the end of the third sleeve (3) away from the connecting sleeve (2) is connected to a driving handle for driving the third sleeve (3) to rotate.

9. The bolt tightening tool according to claim 8, characterized in that: The driving handle comprises a main body (8), a driving motor, a switch button (803) and a rotating shaft (801); the driving motor is arranged in the main body (8); the rotating shaft (801) is rotatably connected to one end of the main body (8) and is connected to the driving shaft of the driving motor; the other end of the rotating shaft (801) is connected to the third sleeve (3); the main body (8) is provided with a gripping portion (802); the switch button (803) is arranged on the gripping portion (802) and is electrically connected to the driving motor.

10. The bolt tightening tool according to claim 9, characterized in that: A torque sensor is arranged inside the main body (8), and the torque sensor is electrically connected to the drive motor.

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