SMA (Shape Memory Alloy) simply-mounted torque wrench with acoustic vibration feedback
By designing an SMA torque wrench with acoustic and vibration feedback, the problem of difficult to quickly assemble and lack of feedback during assembly and use of existing wrenches is solved, and the tightening of the SMA connector through sound and vibration sensing in different environments is achieved.
Patent Information
- Application Number
- CN202421647610.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-12
AI Technical Summary
Existing SMA torque wrenches have problems with difficulty in assembly and use and lack of feedback, making it difficult to sense the tightening of the SMA connectors through sound and vibration in noisy factory workshop environments.
A SMA simple installation torque wrench with acoustic and vibration feedback is designed, using a specially made easy-to-equipped pin and steel ball structure, adjusting the torque by adjusting the screws, and sound and vibration feedback are emitted when the wrench head reaches a specific angle.
It realizes tightening of the SMA connector through sound and vibration sensing in a quiet and noisy factory workshop environment, improving assembly efficiency and convenience of use.
Smart Images
Figure CN222818789U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of torque wrenches, in particular to an SMA simply installed torque wrench with acoustic vibration feedback. Background Art
[0002] SMA connectors are widely used in the communications industry and require a special tool, namely an SMA torque wrench, for tightening. When connecting the SMA connector, the tightening force needs to be controlled to ensure that the connector threads are tightened and not damaged by excessive torque, while also preventing the torque from being too small, resulting in poor contact of the SMA connector.
[0003] Existing torque wrenches usually require a complicated installation process, that is, the existing manufacturers' SMA torque wrenches are not fully considered in the design and manufacturing of the difficult on-site assembly problem, and are assembled using general pins or elastic cotter pins. After the springs, balls and other structural parts are installed in the torque bar, the spring force on the wrench head makes it difficult to assemble it with the torque bar, and the pins or elastic cotter pins cannot be quickly embedded, making it difficult to improve the assembly efficiency.
[0004] Existing SMA torque wrenches do not fully consider the needs of on-site customer staff for hand (tactile) and auditory (audio) feedback when the SMA connector is tightened into place during use. In the noisy factory workshop environment, the staff can only determine whether the SMA connector is tightened into place by visually observing the angle change between the wrench head and the wrench handle of the torque wrench or by sensing the process from the presence to the disappearance of torque. It has no feedback function and is inconvenient to use. Utility Model Content
[0005] The utility model aims to provide an SMA simple installation torque wrench with sound and vibration feedback, aiming to meet the needs of users in quiet and noisy factory workshop environments to sense whether the SMA connector is tightened in place through sound and vibration.
[0006] To achieve the above-mentioned purpose, the utility model provides an SMA simple installation torque wrench with acoustic vibration feedback, including a wrench head, a torsion bar, a pin, a steel ball, a first connecting column, a second connecting column, a spring and an adjusting screw; the adjusting screw is arranged in the torsion bar, the first connecting column is fixedly connected to the adjusting screw and is located in the torsion bar, the spring is fixedly connected to the first connecting column and is located on the side of the first connecting column away from the adjusting screw, the second connecting column is fixedly connected to the spring and is located on the side of the spring away from the first connecting column, the steel ball is arranged on the side of the second connecting column away from the spring, the wrench head is arranged on the side of the torsion bar close to the steel ball, and the pin is arranged on one side of the wrench head and the torsion bar.
[0007] The wrench head has a wrench opening, a first pin through hole, a first convex small arc surface, an inwardly concave large arc surface, a second convex small arc surface, a first plane and a second plane.
[0008] Wherein, the torsion bar comprises a second pin through hole, a third pin through hole, an upper arc surface of the cavity, a lower arc surface of the cavity, an internal threaded hole and a torsion bar force application area.
[0009] Wherein, the diameter of the concave large arc surface is the same as the diameter of the steel ball.
[0010] The pin has a first interference fit area, a second clearance fit area, an interference and clearance transition area and a perforation chamfer.
[0011] The utility model discloses an SMA simple installation torque wrench with acoustic vibration feedback, the wrench head is used to clamp the SMA fastener and is connected to the torsion bar, the torsion bar is a rod for transmitting torsion, the torsion bar is a hollow column structure, the pin is a special easy-to-install pin, used to connect the wrench head with the torsion bar, the steel ball is located inside the torsion bar, between the wrench head and the second connecting column, and is used to transmit torsion, when the wrench head is at different specific angles, the steel ball can collide with the torsion bar to generate vibration and crisp sound, the second connecting column is located inside the torsion bar, between the ball and the spring, and is used to transmit The first connecting column is between the spring and the adjusting screw, and is used to adjust the torque. The spring is located inside the torsion bar, between the first connecting column and the second connecting column, and is used to provide elastic force to reset the wrench head or twist the wrench head to a specific angle. The adjusting screw is located at the rear end of the torsion bar and is connected to the first connecting column, and is used to loosen or tighten the spring to adjust the torque. The torque wrench uses a special easy-to-install pin, which is convenient for rapid batch installation, and has sound and vibration feedback. When the wrench head reaches a specific angle, it will emit sound and vibration feedback to prompt the user to stop applying force. It meets the requirements of sensing the tightening of the SMA connector through sound and vibration in both quiet and noisy factory workshop environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.
[0013] Figure 1 It is a schematic diagram of the structure of the utility model, wherein (A) is a main view and (B) is a top view.
[0014] Figure 2 for Figure 1 Schematic diagram of the internal structure.
[0015] Figure 3 It is a schematic diagram of the structure of the wrench head, wherein (C) is the front view of the wrench head and (D) is the top view of the wrench head.
[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the torsion bar, wherein (a) is the front view of the torsion bar, (b) is the transverse cross-sectional view of the torsion bar, and (c) is the longitudinal cross-sectional view of the torsion bar.
[0017] Figure 5 This is a schematic diagram of the special easy-to-install pin structure.
[0018] Figure 6 It is a schematic diagram of the adjusting screw structure, wherein (d) is the front view of the adjusting screw, and (e) is the right view of the adjusting screw.
[0019] Figure 7 This is a schematic diagram of the structure of the torque wrench in its original state.
[0020] Figure 8 It is a schematic diagram of the structure of the torque wrench in which the torsion bar and the wrench head form a 30° state.
[0021] Fig. 9 It is a schematic diagram of the structure of the torque wrench in which the torsion bar and the wrench head form a 45° state.
[0022] Fig.10 It is a schematic diagram of the structure of the torque wrench in which the torsion bar and the wrench head form a 60° state.
[0023] Fig.11 It is a structural schematic diagram of the torque wrench in which the torsion bar and the wrench head form a 90° state.
[0024] In the figure: 10-wrench head, 20-torsion bar, 30-pin, 40-steel ball, 50-first connecting column, 51-second connecting column, 60-spring, 70-adjusting screw, 11-wrench opening, 12-first pin through hole, 13-first convex small arc surface, 14-inward concave large arc surface, 15-second convex small arc surface, 16-first plane, 17-second plane, 21-second pin through hole, 22-third pin Nail perforation, 23-cavity, 231-upper arc surface of cavity, 232-lower arc surface of cavity, 24-internal threaded hole, 25-torsion bar force application area, 31-first interference fit area, 32-second clearance fit area, 33-interference and clearance transition area, 34-perforation chamfer, 41-upper pole point, 42-lower pole point, 43-left pole point, 44-right pole point, 71-inner hexagonal countersunk hole, 72-external thread. DETAILED DESCRIPTION
[0025] See also Figure 1-Figure 11The utility model discloses an SMA simple installation torque wrench with acoustic vibration feedback, comprising a wrench head 10, a torsion bar 20, a pin 30, a steel ball 40, a first connecting column 50, a second connecting column 51, a spring 60 and an adjusting screw 70; the adjusting screw 70 is arranged in the torsion bar 20, the first connecting column 50 is fixedly connected to the adjusting screw 70 and is located in the torsion bar 20, the spring 60 is fixedly connected to the first connecting column 50 and is located on a side of the first connecting column 50 away from the adjusting screw 70, the second connecting column 51 is fixedly connected to the spring 60 and is located on a side of the spring 60 away from the first connecting column 50, the steel ball 40 is arranged on a side of the first connecting column 50 away from the spring 60, the wrench head 10 is arranged on a side of the torsion bar 20 close to the steel ball 40, and the pin 30 is arranged on one side of the wrench head 10 and the torsion bar 20.
[0026] In this embodiment, the wrench head 10 is used to clamp the SMA fastener and is connected to the torsion bar 20. The torsion bar 20 is a rod for transmitting torsion. The torsion bar 20 is a hollow column structure. The pin 30 is a special easy-to-install pin used to connect the wrench head 10 with the torsion bar 20. The steel ball 40 is located inside the torsion bar 20, between the wrench head 10 and the second connecting column 51, and is used to transmit torsion. When the wrench head 10 is at different specific angles, the steel ball 40 can collide with the torsion bar 20 to produce vibration and crisp sound. The second connecting column 51 is located inside the torsion bar 20, between the ball and the spring 60, and is used to transmit torsion and push the Steel ball 40, the first connecting column 50 is between the spring 60 and the adjusting screw 70, used to adjust the torque, the spring 60 is located inside the torsion bar 20, between the first connecting column 50 and the second connecting column 51, used to provide elastic force to reset the wrench head 10 or twist the wrench head 10 to a specific angle, the adjusting screw 70 is located at the rear end inside the torsion bar 20, connected to the first connecting column 50, used to loosen or tighten the spring 60, adjust the torque, the torque wrench uses the specially made easy-to-install pin 30, convenient and fast batch installation, and with sound and vibration feedback, when the wrench head 10 reaches a specific angle, it will emit sound and vibration feedback to prompt the user to stop applying force. It meets the requirements of sensing the tightening of the SMA connector by sound and vibration in both quiet and noisy factory workshop environments.
[0027] Furthermore, the wrench head 10 has a wrench opening 11 , a first pin through hole 12 , a first convex small arc surface 13 , an inwardly concave large arc surface 14 , a second convex small arc surface 15 , a first plane 16 and a second plane 17 .
[0028] In this embodiment, the first convex small arc surface 13 and the second convex small arc surface 15 are symmetrical structures to each other, and the first plane 16 and the second plane 17 are symmetrical structures to each other. The first convex small arc surface 13, the concave large arc surface 14, the second convex small arc surface 15, the first plane 16, and the second plane 17 are the top pressure contact surfaces with the steel ball 40 when the wrench head 10 and the torsion bar 20 are rotated at different angles, and the diameter of the concave large arc surface 14 is the same as the diameter of the steel ball 40.
[0029] Furthermore, the torsion bar 20 has a second pin through hole 21, a third pin through hole 22, an upper arc surface 23 of the cavity, an upper arc surface 231 of the cavity, a lower arc surface 232 of the cavity, an internal threaded hole 24 and a torsion bar force application area 25, and the pin 30 has a first interference fit area 31, a second clearance fit area 32, an interference and clearance transition area 33 and a perforation chamfer 34.
[0030] In this embodiment, the diameter comparison is: the interference fit area 31>the first pin hole 12=the second pin hole 21=the third pin hole 22>the clearance fit area 32, the cavity of the torsion bar 20>the first connecting column 50=the second connecting column 51≥the steel ball 40=the concave large arc surface 14>the threaded bottom hole of the internal threaded hole 24.
[0031] The assembly sequence of the torsion bar 20 and other structures is as follows: the first connecting column 50, the spring 60, the second connecting column 51, the steel ball 40, the wrench head 10, and the pin 30 are sequentially installed in the cavity from right to left, and finally the adjusting screw 70 is screwed in from right to left through the internal threaded hole 24.
[0032] The steel ball 40 has an upper polar point 41 , a lower polar point 42 , a left polar point 43 and a right polar point 44 , and the adjustment screw 70 has a hexagonal countersunk hole 71 and an external thread 72 .
[0033] The installation process of the pin 30: the first pin through hole 12 of the wrench head 10 is aligned with the second pin through hole 21 and the third pin through hole 22, and one end of the through hole chamfer 34 of the pin 30 is manually inserted into the second pin through hole 21, the first pin through hole 12 and the third pin through hole 22 in sequence. When the interference and clearance transition area 33 of the pin 30 reaches the second pin through hole 21 (the pin 30 cannot be inserted by hand at this time), a pressing tool can be used to press one end of the first interference fit area 31 of the pin 30 to completely insert the first interference fit area 31 of the pin 30 into the second pin through hole 21. Rotating the adjustment screw 70 and pushing the first connecting column 50 can realize the expansion and contraction of the spring 60, so that the spring 60 pushes the second connecting column 51, and the second connecting column 51 pushes the steel ball 40 to move along the direction of realizing the expansion and contraction of the spring 60.
[0034] When using a torque wrench to tighten the SMA, the wrench opening 11 is clamped on the SMA, and a torque is applied to the torsion bar force area 25 with fingers. The angle formed by the wrench head 10 and the torsion bar 20 changes from 0 to 90°. During this angle change, the squeezing force of the wrench head 10 on the steel ball 40 is different. In addition to moving in the expansion and contraction direction of the spring 60, the steel ball 40 also moves in the up and down directions of the cavity of the torsion bar 20.
[0035] Assuming that when the torque reaches the set value, the angle formed by the wrench head 10 and the torsion bar 20 is 45°, the angles of 0°, 30°, 45°, 60° and 90° are taken for analysis respectively: the wrench head 10 and the torsion bar 20 are on the same axis, that is, the angle is 0°, the steel ball 40 completely fits the concave large arc surface 14, and the steel ball 40 is on the axis of the cavity, that is, there is a gap between the upper polar point 41 of the steel ball 40 and the upper arc surface 231 of the cavity, and there is a gap between the lower polar point 42 and the lower arc surface 232 of the cavity;
[0036] When the angle between the wrench head 10 and the torsion bar 20 changes to 30°, the second convex small arc surface 15 squeezes the steel ball 40 and pushes it toward the upper arc surface 231 of the cavity. At this time, the gap between the upper pole point 41 of the steel ball 40 and the upper arc surface 231 of the cavity is 0, and the gap between the lower pole point 42 and the lower arc surface 232 of the cavity reaches the maximum.
[0037] When the angle between the wrench head 10 and the torsion bar 20 changes from 0 to 45°, the finger is in the process of applying force, and the squeezing of the steel ball 40 by the second convex small arc surface 15 reaches the limit in the expansion and contraction direction of the spring 60, and the second convex small arc surface 15 is just tangent to the left polar point 43 of the steel ball 40, that is, the squeezing of the steel ball 40 by the second convex small arc surface 15 in the direction of the upper arc surface 231 of the cavity disappears, and the steel ball 40 returns to the axis of the cavity, that is, there is a gap between the upper polar point 41 of the steel ball 40 and the upper arc surface 231 of the cavity, and there is a gap between the lower polar point 42 and the lower arc surface 232 of the cavity;
[0038] When the angle between the wrench head 10 and the torsion bar 20 changes to more than 45°, the second convex small arc surface 15 slides over the tangent point with the steel ball 40 (the left pole point 43), and under the elastic force of the spring 60 and the extrusion of the second convex small arc surface 15, the steel ball 40 quickly moves and impacts the lower arc surface 232 of the cavity (60° is the schematic state of the steel ball 40 stopping the impact), so that the cavity of the torsion bar 20 produces obvious impact vibration and crisp impact sound, and the torsion bar force application area 25 transmits the impact vibration to the force-applying finger, and at the same time, the finger changes from the force-applying process to the reaction force-bearing process of the torsion bar 20;
[0039] When the angle between the wrench head 10 and the torsion bar 20 changes to 90°, the first plane 16 is just tangent to the left polar point 43 of the steel ball 40, that is, the extrusion of the steel ball 40 by the first plane 16 in the direction of the upper arc surface 231 of the cavity and the lower arc surface 232 of the cavity disappears, and the steel ball 40 returns to the axis of the cavity, that is, there is a gap between the upper polar point 41 of the steel ball 40 and the upper arc surface 231 of the cavity, and there is a gap between the lower polar point 42 and the lower arc surface 232 of the cavity. At this moment, the reaction force of the torsion bar 20 on the finger becomes 0, and the torque wrench completes the tightening force on the SMA.
[0040] The above disclosure is only a preferred embodiment of the SMA simple installation torque wrench with acoustic vibration feedback of the utility model of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.
Claims
1. A SMA simple installation torque wrench with acoustic vibration feedback, characterized in that: It includes a wrench head, a torsion bar, a pin, a steel ball, a first connecting column, a second connecting column, a spring and an adjusting screw; The adjusting screw is arranged in the torsion bar, the first connecting column is fixedly connected to the adjusting screw and is located in the torsion bar, the spring is fixedly connected to the first connecting column and is located on a side of the first connecting column away from the adjusting screw, the second connecting column is fixedly connected to the spring and is located on a side of the spring away from the first connecting column, the steel ball is arranged on a side of the second connecting column away from the spring, the wrench head is arranged on a side of the torsion bar close to the steel ball, and the pin is arranged on one side of the wrench head and the torsion bar.
2. The SMA simple installation torque wrench with acoustic vibration feedback as claimed in claim 1, characterized in that: The wrench head comprises a wrench opening, a first pin through hole, a first convex small arc surface, an indented large arc surface, a second convex small arc surface, a first plane and a second plane.
3. The SMA simple installation torque wrench with acoustic vibration feedback as claimed in claim 2, characterized in that: The torsion bar comprises a second pin through hole, a third pin through hole, an upper arc surface of the cavity, a lower arc surface of the cavity, an internal threaded hole and a torsion bar force application area.
4. The SMA simple installation torque wrench with acoustic vibration feedback as claimed in claim 2, characterized in that: The diameter of the concave large arc surface is the same as the diameter of the steel ball.
5. The SMA simple installation torque wrench with acoustic vibration feedback as claimed in claim 1, characterized in that: The pin has a first interference fit area, a second clearance fit area, an interference and clearance transition area and a perforation chamfer.