Constant-torque screwdriver
The fixed-torque screwdriver stabilizes the handle to ensure consistent torque application, addressing handle wobbling issues and enabling precise fastener tightening.
Patent Information
- Application Number
- CN202422328438.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-24
AI Technical Summary
During use, existing torque-fixing drivers are prone to change in torque value due to the squirming of the handle, and it is impossible to precisely tighten the fastener to a reasonable torque value.
A structure including a housing, a handle fixing member, a pressure-bearing ring, a sliding clutch ring and a rotating clutch ring is designed. The fixing ring and the handle fixing member form a force sandwiched against the end surface of the blind hole to prevent the handle from retracting and squirting, and ensure the stability of the torque value.
Accurate control of torque value, preventing the handle from squirting, ensuring that the fastener is tightened to a reasonable torque range, and improving the accuracy of use.
Smart Images
Figure CN223099087U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screwdrivers, in particular to a constant-torque screwdriver. Background Art
[0002] Constant-torque screwdrivers are widely used in medical surgeries to apply a constant torque to screwed fasteners such as screws, preventing insufficient pre-tightening force applied to the fasteners due to too small torque or damage to the fasteners caused by too large torque.
[0003] However, when the existing constant-torque screwdriver rotates the fastener, the torque value of the constant-torque screwdriver often changes due to the forward and backward movement of the handle, resulting in the user being unable to adapt to the change in the torque value of the constant-torque screwdriver in a timely manner, and thus unable to accurately tighten the fastener to a reasonable torque value. Therefore, the applicant has made a beneficial design and found a solution to the above problems. The technical solution to be introduced below was generated under this background. Summary of the Invention
[0004] The purpose of the utility model is to overcome the deficiencies of the existing traditional constant-torque screwdriver design and provide an anti-creeper product.
[0005] To solve the above problems, the utility model adopts the following technical solutions.
[0006] A constant-torque screwdriver includes a housing, a handle, and a handle fixing member. One end of the housing is provided with a blind hole. The handle fixing member is sleeved on the outer wall of the handle and is also sleeved inside the housing, enabling the handle to pass through the housing. The handle fixing member is provided with a stop portion and a threaded portion, and the threaded portion is arranged in the blind hole. The threaded portion is threadedly connected with a fixing ring and forms a force that clamps the end face of the blind hole together with the stop portion.
[0007] Preferably, a plug cover is threadedly connected to the other end of the housing. A support ring is threadedly connected inside the housing and abuts against the plug cover. The support ring is provided with a through hole, and a plurality of equally spaced pressure-bearing grooves are uniformly distributed on the inner wall of the housing with a dot as the center.
[0008] Preferably, a pressure-bearing ring, a sliding clutch ring, and a rotating clutch ring are sequentially arranged inside the housing. The sliding clutch ring meshes with the rotating clutch ring. A plurality of equally spaced first grooves are uniformly distributed on the inner wall of the rotating clutch ring with a dot as the center. The pressure-bearing ring and the sliding clutch ring are provided with protruding portions corresponding to the pressure-bearing grooves.
[0009] Preferably, second grooves are provided on both sides of the inner wall of the handle fixing member. The handle fixing member is sleeved inside the rotating clutch ring, and a pressure-bearing portion corresponding to the first grooves is provided on the outer wall of the handle fixing member.
[0010] Preferably, two sides of the handle are provided with abutting parts, which are arranged in the second groove.
[0011] Preferably, a compression spring is arranged between the pressure-bearing ring and the support ring, so that the pressure-bearing ring is in close contact with the sliding clutch ring, and the sliding clutch ring is in close contact with the rotating clutch ring.
[0012] Preferably, the handle is provided with a jack.
[0013] Advantageous effects:
[0014] Compared with the prior art, the advantageous effects of the present utility model are as follows:
[0015] In the present utility model, a force for clamping the end face of the blind hole is formed by the fixing ring and the handle fixing member, preventing the handle from retracting and moving up and down when applying a downward pressure to the fastener, ensuring that the torque value fluctuation is within a small range, and thus accurately tightening the fastener to a reasonable torque value, making the product have the advantage of preventing movement. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic side sectional structure view of a torque screwdriver of the present utility model;
[0017] Figure 2 is an exploded view of a torque screwdriver of the present utility model;
[0018] The corresponding relationship between the reference numerals in the drawings and the component names is as follows:
[0019] Reference numerals: 1, housing; 2, handle; 3, handle fixing member; 4, fixing ring; 5, plug; 6, pressure-bearing ring; 7, sliding clutch ring; 8, rotating clutch ring; 9, protruding part; 9.1, compression spring; 11, blind hole; 12, support ring; 13, pressure-bearing groove; 121, through hole; 21, abutting part; 22, jack; 31, blocking part; 32, threaded part; 33, second groove; 34, pressure-bearing part; 81, first groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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, it should not be construed as a limitation to the present utility model.
[0022] In the embodiments of the present utility model, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the front and rear associated objects.
[0023] Reference example Figure 1 , Figure 2 , a fixed-torque screwdriver, comprising a housing 1, a handle 2, and a handle 2 fixing member. One end of the housing 1 is provided with a blind hole 11. The handle 2 fixing member is sleeved on the outer wall of the handle 2 and is sleeved inside the housing 1 so that the handle 2 passes through the housing 1. The handle 2 fixing member is provided with a blocking portion 31 and also a threaded portion 32, which is arranged in the blind hole 11. The threaded portion 32 is threadedly connected with a fixing ring 4 and forms a force that clamps the end face of the blind hole 11 together with the blocking portion 31. By the fixing ring 4 and the handle 2 fixing member forming a force that clamps the end face of the blind hole 11, it prevents the handle 2 from retracting inward and generating vertical movement when a downward pressure is applied to the fastener, ensuring that the torque value fluctuation is within a small range, thereby precisely tightening the fastener to a reasonable torque value. The fixing ring 4 is buried in the blind hole 11 through the blind hole 11 to prevent other people from rotating the fixing ring 4;
[0024] It is worth mentioning that the other end of the housing 1 is threadedly connected with a plug cover 5. A support ring 12 is threadedly connected inside the housing 1 and abuts against the plug cover 5. The support ring 12 is provided with a through hole 121. The inner wall of the housing 1 is evenly distributed with a number of equally spaced pressure-bearing grooves 13 centered on a dot. The plug cover 5 further supports the support ring 12. At the same time, it prevents external dust and impurities from entering the housing 1. The support ring 12 provides support for the compression spring 9.1. The through hole 121 is for inserting a hexagon wrench and rotating it to adjust the torque value of the handle 2. The pressure-bearing grooves 13 prevent the pressure-bearing ring 6 and the sliding clutch ring 7 from rotating;
[0025] It is worth mentioning that a pressure-bearing ring 6, a sliding clutch ring 7, and a rotating clutch ring 8 are sequentially arranged inside the housing 1. The sliding clutch ring 7 meshes with the rotating clutch ring 8. A plurality of equally spaced first grooves 81 are evenly distributed on the inner wall of the rotating clutch ring 8 with the dot as the axis. The pressure-bearing ring 6 and the sliding clutch ring 7 are provided with protruding parts 9 corresponding to the pressure-bearing grooves 13. When the torque generated by the rotation of the handle 2 exceeds the preset torque value, the rotating clutch ring 8 rotates relative to the sliding clutch ring 7. At this time, the sliding clutch ring 7 moves towards the support ring 12, and the compression spring 9.1 is squeezed. When the rotating clutch ring 8 rotates a certain angle, that is, after the meshing part changes, the compression spring 9.1 releases elastic force to the sliding clutch ring 7, so that it returns to the state of tightly meshing with the rotating clutch ring 8 again;
[0026] It is worth mentioning that on both sides of the inner wall of the fixing part of the handle 2, there are second grooves 33. The fixing part of the handle 2 is sleeved inside the rotating clutch ring 8. On the outer wall of the fixing part of the handle 2, there is a pressure-bearing part 34 corresponding to the first groove 81. The first groove 81 and the pressure-bearing part 34 are in mutual abutment, so that the handle 2 fixing ring 4 rotates synchronously with the rotating clutch ring 8;
[0027] It is worth mentioning that on both sides of the handle 2, there are abutting parts 21, which are arranged in the second grooves 33. The second grooves 33 and the abutting parts 21 are in mutual abutment, and the handle 2 fixing ring 4 provides a supporting force for the rotation of the handle 2;
[0028] It is worth mentioning that a compression spring 9.1 is arranged between the pressure-bearing ring 6 and the support ring 12, so that the pressure-bearing ring 6 and the sliding clutch ring 7, and the sliding clutch ring 7 and the rotating clutch ring 8 are in close contact with each other. According to the elastic force of the compression spring 9.1, the handle 2 corresponds to different torque values. After the plug 5 is tightened, without special tools, the plug 5 cannot be removed, and the elastic force of the compression spring 9.1 cannot be adjusted, so as to realize the fixed torque value of the torque screwdriver;
[0029] It is worth mentioning that the handle 2 is provided with a jack 22, and different screwdrivers can be installed into the jack 22.
[0030] Through the above design, the product can achieve the advantage of preventing crosstalk.
[0031] The above content further elaborates on the present invention in combination with specific implementation manners. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present invention.
Claims
1. A torque screwdriver, comprising a housing (1), a handle (2), and a handle (2) fixing member, characterized in that: One end of the housing (1) is provided with a blind hole (11). The fixing sleeve of the handle (2) is sleeved on the outer wall of the handle (2), and the fixing sleeve of the handle (2) is sleeved in the housing (1) so that the handle (2) passes through the housing (1). The fixing member of the handle (2) is provided with a blocking portion (31), and the fixing member of the handle (2) is further provided with a threaded portion (32) which is arranged in the blind hole (11). The threaded portion (32) is threadedly connected with a fixing ring (4) and forms a force clamping the end face of the blind hole (11) with the blocking portion (31).
2. The torque driver according to claim 1, wherein: The other end of the housing (1) is threadedly connected with a plug cover (5). A support ring (12) is threadedly connected in the housing (1) and abuts against the plug cover (5). The support ring (12) is provided with a through hole (121). A plurality of equally spaced pressure-bearing grooves (13) are evenly distributed on the inner wall of the housing (1) with the dot as the axis.
3. The torque screwdriver according to claim 2, wherein: A pressure-bearing ring (6), a sliding clutch ring (7), and a rotating clutch ring (8) are sequentially arranged in the housing (1). The sliding clutch ring (7) meshes with the rotating clutch ring (8). A plurality of equally spaced first grooves (81) are evenly distributed on the inner wall of the rotating clutch ring (8) with the dot as the axis. The pressure-bearing ring (6) and the sliding clutch ring (7) are provided with protruding portions (9) corresponding to the pressure-bearing grooves (13).
4. The torque screwdriver according to claim 3, wherein: Both sides of the inner wall of the fixing member of the handle (2) are provided with second grooves (33). The fixing sleeve of the handle (2) is sleeved in the rotating clutch ring (8). The outer wall of the fixing member of the handle (2) is provided with a pressure-bearing portion (34) corresponding to the first groove (81).
5. The constant-torque screwdriver according to claim 4, wherein: Both sides of the handle (2) are provided with abutting portions (21) which are arranged in the second grooves (33).
6. The torque driver according to claim 4 or 5, characterized in that: A compression spring (9.1) is arranged between the pressure-bearing ring (6) and the support ring (12) so that the pressure-bearing ring (6) and the sliding clutch ring (7), and the sliding clutch ring (7) and the rotating clutch ring (8) are tightly abutted against each other.
7. The torque screwdriver according to claim 1, wherein: The handle (2) is provided with a jack (22).