Preset torsion screwdriver

Abstract

The utility model discloses a preset type torsion screwdriver which comprises a main body and a screwdriver body, a torsion adjusting device is arranged in the main body, the torsion adjusting device is provided with a sleeve column, the screwdriver body is arranged on the sleeve column in a sleeved mode, a plurality of first grooves are evenly distributed in the sleeve column with a circle point as the axis, and a plurality of second grooves are formed in the first grooves. A first groove is formed in the sleeve column, a second groove is formed near the first groove, a fixing piece is inserted in the first groove, the fixing piece is provided with a first fixing part and is inserted in the second groove, and the fixing piece is provided with an elastic part and acts on the inner wall of the screw driver, so that the screw driver is fixedly connected with the sleeve column. The elastic parts act on the inner wall of the screw driver, so that the screw driver is stably connected with the sleeve column, the sleeve column provided with the multiple elastic parts is replaced, the connection stability of the sleeve column and the screw driver is enhanced, meanwhile, the anti-skid protrusions are arranged on the surfaces of the elastic parts, sideslip is prevented when the screw driver rotates, and a product has the advantage of being stable in connection.

Description

Technical Field

[0001] The utility model relates to the technical field of screwdrivers, in particular to a preset torque screwdriver. Background Art

[0002] A torque driver is a tool used to control torque. It can accurately adjust the torque so that bolts and nuts meet the standard torque requirements. A torque driver is also called a torque screwdriver. In layman's terms, it is a screwdriver with a torque value. There are two main types of drivers currently in use: preset torque drivers and pointer torque drivers. The connection quality of fasteners directly affects the quality of use of various instruments, electromechanical equipment, household appliances and other products, as well as the reliability of these products. Therefore, torque tools such as Zhuheng torque drivers are gradually being used more and more in industrial production.

[0003] The screwdriver in the sleeve of a torque screwdriver is a common tool used to turn screws to put them in place. The screwdrivers mainly include flathead (minus sign), cross (positive sign), internal hexagon and external hexagon. During the twisting process of the screwdrivers currently on the market, when the screwdriver is pulled out of the screw or during operation, the screwdriver is easily dropped off due to insufficient magnetic attraction of the sleeve, and the screwdriver needs to be reinserted into the sleeve, which makes it inconvenient to use. Therefore, the applicant has made a useful design and found a solution to the above problem. The technical solution to be introduced below is produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional preset torque screwdriver design and provide a product with stable connection.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A preset torque screwdriver comprises a main body and a screwdriver. A torque adjustment device is arranged in the main body, the torque adjustment device is provided with a sleeve column, the screwdriver is sleeved on the sleeve column, the sleeve column is provided with a plurality of first grooves evenly distributed with a round point as the axis, a second groove is provided near the first groove, a fixing plate is inserted into the first groove, the fixing plate is provided with a first fixing part and is inserted into the second groove, the fixing plate is provided with an elastic part and acts on the inner wall of the screwdriver to connect and fix the screwdriver to the sleeve column.

[0007] Preferably, limiting grooves are provided on both sides of the first groove, the first groove is provided with an opening for the elastic part to pass through, and the number of the first grooves is set to at least two.

[0008] Preferably, a plurality of anti-slip protrusions are provided on the surface of the elastic portion.

[0009] Preferably, second fixing parts are provided on both sides of the fixing sheet and inserted into the limiting groove, and protrusions are provided on both sides of the first fixing part and the second fixing part.

[0010] Preferably, the main body is provided with a loading hand wheel, and a fixed round tooth which can move up and down is provided inside the main body.

[0011] Preferably, the torque adjustment device includes a central threaded rod, an adjusting torque disk, a threaded torque disk, a double-headed screw, and a rotating round tooth. The central threaded rod is engaged with a loading handwheel, the adjusting torque disk is threadedly connected to the inner wall of the main body, the adjusting torque disk abuts the central threaded rod, the threaded torque disk is threadedly connected to the central threaded rod, and a compression spring is provided between the threaded torque disk and the fixed round tooth.

[0012] Preferably, the double-headed screw passes through the central threaded rod, one end of the double-headed screw is provided with a locking nut, an elastic spring is provided between the locking nut and the loading handwheel, and the other end of the double-headed screw is threadedly connected to the sleeve column.

[0013] Preferably, the rotating scallop is sleeved on the outer wall of the sleeve column, and the teeth of the rotating scallop correspond to the tooth grooves of the fixed scallop.

[0014] Beneficial effects:

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model stabilizes the connection between the screwdriver and the sleeve column by acting on the inner wall of the screwdriver through the elastic part. The connection stability between the sleeve column and the screwdriver is enhanced by replacing the sleeve column provided with multiple elastic parts, thereby overcoming the defects proposed by the background technology. At the same time, anti-skid protrusions are provided on the surface of the elastic part to prevent the screwdriver from sliding sideways when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the side cross-section structure of a preset torque screwdriver of the utility model;

[0018] Figure 2 For this utility model Figure 1 A partial structure enlarged view of detail A of a preset torque screwdriver;

[0019] Figure 3 It is an exploded view of a sleeve column of a preset torque screwdriver of the utility model;

[0020] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0021] Reference numerals: 1, main body; 2, screwdriver; 3, torque adjustment device; 4, sleeve column; 5, fixing plate;

[0022] 11. Loading hand wheel; 12. Fixing round teeth;

[0023] 31. Center threaded rod; 32. Adjusting torque plate; 33. Threaded torque plate; 34. Double-headed screw; 35. Rotating round teeth; 36. Compression spring; 37. Lock nut; 38. Elastic spring;

[0024] 41. first groove; 42. second groove; 43. limiting groove; 44. opening;

[0025] 51. First fixing portion; 52. Elastic portion; 53. Anti-slip protrusion; 54. Second fixing portion; 55. Protrusion. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] Reference example Figures 1 to 3A preset torque screwdriver comprises a main body 1 and a screwdriver 2. A torque adjusting device 3 is arranged in the main body 1. The torque adjusting device 3 is provided with a sleeve column 4. The screwdriver 2 is sleeved on the sleeve column 4. The sleeve column 4 is evenly distributed with a plurality of first grooves 41 with a dot as the axis. A second groove 42 is arranged near the first groove 41. A fixing sheet 5 is inserted into the first groove 41. The fixing sheet 5 is provided with a first fixing portion 51 and is inserted into the second groove 42. The fixing sheet 5 is provided with an elastic portion 52 and acts on the inner wall of the screwdriver 2 to connect and fix the screwdriver 2 with the sleeve column 4. The elastic portion 52 acts on the inner wall of the screwdriver 2 to make the screwdriver 2 and the sleeve column 4 connected stably. By replacing the sleeve column 4 provided with a plurality of elastic portions 52, the connection stability between the sleeve column 4 and the screwdriver 2 is enhanced, thereby overcoming the defects proposed by the background technology;

[0030] It is worth mentioning that limiting grooves 43 are provided on both sides of the first groove 41, and the first groove 41 is provided with an opening 44 for the elastic part 52 to pass through. The number of the first grooves 41 is set to be at least two, and the limiting grooves 43 are used for tooling to be inserted to apply downward pressure to the second fixing part 54;

[0031] It is worth mentioning that a plurality of anti-skid protrusions 53 are provided on the surface of the elastic portion 52 to prevent the screwdriver 2 from sliding sideways when rotating.

[0032] It is worth mentioning that the fixing plate 5 is provided with a second fixing portion 54 on both sides and inserted into the limiting groove 43, and the first fixing portion 51 and the second fixing portion 54 are provided with a protrusion 55 on both sides. The protrusion 55 enables the first fixing plate 5 and the second fixing plate 5 to be connected and fixed to the sleeve 4 in an interference fit manner, and the connection stability of the fixing plate 5 and the sleeve 4 is enhanced through two connection points;

[0033] It is worth mentioning that the main body 1 is provided with a loading hand wheel 11, and a fixed round tooth 12 that can move up and down is provided inside the main body 1. The rotation of the central threaded rod 31 is controlled by rotating the loading hand wheel 11, and the fixed round tooth 12 is subjected to the force of the pressure spring;

[0034] It is worth mentioning that the torque adjustment device 3 includes a central threaded rod 31, an adjusting torque disc 32, a threaded torque disc 33, a double-headed screw 34, and a rotating round tooth 35. The central threaded rod 31 is meshed with the loading hand wheel 11, the adjusting torque disc 32 is threadedly connected to the inner wall of the main body 1, the adjusting torque disc 32 abuts against the central threaded rod 31, the threaded torque disc 33 is threadedly connected to the central threaded rod 31, and a compression spring 36 is provided between the threaded torque disc 33 and the fixed round tooth 12. By rotating the loading hand wheel 11 and driving the central screw to rotate, the threaded torque disc 33 is driven to rotate and make it move upward or downward. When the threaded torque disc 33 moves upward, the spacing between the pitches of the compression spring 36 increases, and the force acting on the fixed round tooth 12 and the torque of the sleeve column 4 decrease; when the threaded torque disc 33 moves downward, the spacing between the pitches of the compression spring 36 decreases, and the force acting on the fixed round tooth 12 and the torque of the sleeve column 4 increase;

[0035] It is worth mentioning that the double-headed screw 34 passes through the central threaded rod 31, and a locking nut 37 is provided at one end of the double-headed screw 34. A spring 38 is provided between the locking nut 37 and the loading handwheel 11. The other end of the double-headed screw 34 is threadedly connected to the sleeve column 4, and the locking nut 37 prevents the central threaded rod 31 from detaching.

[0036] It is worth mentioning that the rotating spherical teeth 35 are sleeved on the outer wall of the sleeve column 4, and the teeth of the rotating spherical teeth 35 correspond to the tooth grooves of the fixed spherical teeth 12. The force of the compression spring 36 is transmitted to the rotating spherical teeth 35 sleeve through the fixed spherical teeth 12, so that the sleeve column 4 bears the torsion of the pressure spring. The rotating spherical teeth 35 sleeve also increases the contact area with the sleeve column 4 and improves the transmission efficiency.

[0037] The above design scheme can enable the product to achieve the advantages of good safety, good stability and good heat dissipation.

[0038] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A preset torque screwdriver, comprising a main body (1) and a screwdriver (2), wherein a torque adjustment device (3) is provided in the main body (1), characterized in that: The torque adjustment device (3) is provided with a sleeve column (4), the screwdriver (2) is sleeved on the sleeve column (4), the sleeve column (4) is provided with a plurality of first grooves (41) evenly distributed with a round point as the axis, a second groove (42) is provided near the first groove (41), a fixing plate (5) is inserted into the first groove (41), the fixing plate (5) is provided with a first fixing portion (51) and is inserted into the second groove (42), the fixing plate (5) is provided with an elastic portion (52) and acts on the inner wall of the screwdriver (2) so that the screwdriver (2) is connected and fixed to the sleeve column (4).

2. The preset torque screwdriver according to claim 1, characterized in that: Limiting grooves (43) are provided on both sides of the first groove (41), the first groove (41) is provided with an opening (44) for the elastic part (52) to pass through, and the number of the first grooves (41) is set to be at least two.

3. The preset torque screwdriver according to claim 2, characterized in that: A plurality of anti-slip protrusions (53) are provided on the surface of the elastic portion (52).

4. The preset torque screwdriver according to claim 3, characterized in that: Second fixing parts (54) are provided on both sides of the fixing sheet (5) and are inserted into the limiting groove (43); and protruding parts (55) are provided on both sides of the first fixing part (51) and the second fixing part (54).

5. The preset torque screwdriver according to claim 1, characterized in that: The main body (1) is provided with a loading hand wheel (11), and a fixed round tooth (12) which can move up and down is provided inside the main body (1).

6. The preset torque screwdriver according to claim 5, characterized in that: The torque adjustment device (3) comprises a central threaded rod (31), an adjusting torque disc (32), a threaded torque disc (33), a double-headed screw (34), and a rotating round tooth (35); the central threaded rod (31) is meshed with a loading hand wheel (11); the adjusting torque disc (32) is threadedly connected to the inner wall of the main body (1); the adjusting torque disc (32) abuts against the central threaded rod (31); the threaded torque disc (33) is threadedly connected to the central threaded rod (31); and a compression spring (36) is provided between the threaded torque disc (33) and the fixed round tooth (12).

7. The preset torque screwdriver according to claim 6, characterized in that: The double-headed screw (34) passes through the central threaded rod (31), one end of the double-headed screw (34) is provided with a locking nut (37), an elastic spring (38) is provided between the locking nut (37) and the loading hand wheel (11), and the other end of the double-headed screw (34) is threadedly connected to the sleeve column (4).

8. The preset torque screwdriver according to claim 7, characterized in that: The rotating spherical teeth (35) are sleeved on the outer wall of the sleeve column (4), and the teeth of the rotating spherical teeth (35) correspond to the tooth grooves of the fixed spherical teeth (12).

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