Adjustable torque wrench
By combining the inner core column, transmission body, push column and spring, and with the design of limit pin and push roller, the problem of easy wear and laborious operation of existing torque wrench ratchet mechanisms is solved, and precise torque adjustment and quick and convenient torque setting are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 重庆飓格科技有限公司
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-08
AI Technical Summary
When setting the torque value using a ratchet in existing torque wrenches, the ratchet mechanism is prone to wear, resulting in decreased accuracy. Furthermore, setting the torque requires excessive rotation and is laborious.
An adjustable torque wrench was designed. Through the combination structure of inner core column, transmission body, push column and spring, the rotation of the handle drives the transmission body to rotate, and the push column moves to squeeze the spring to adjust the torque. Combined with the cooperation of limit pin and push roller, the torque can be precisely adjusted, and the design of groove and adjustment pin can achieve rapid adjustment.
It achieves more precise torque adjustment with a wider range, and faster and more convenient operation, avoiding wear on the ratchet mechanism and improving the accuracy and efficiency of torque setting.
Smart Images
Figure CN224209852U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical tool technology, and more specifically, it relates to an adjustable torque wrench. Background Technology
[0002] Wrenches are commonly used manual tools for screwing and nuting in mechanical assembly and repair. However, some assembly and repair work requires a certain amount of torque, so the torque wrench was designed. A torque wrench is a manual tool used to precisely apply and control torque. It is widely used in mechanical assembly, automotive repair, aerospace, industrial manufacturing and other fields to ensure that fasteners such as bolts and nuts reach the specified tightening force and avoid safety hazards caused by overtightening or loosening.
[0003] Currently, torque wrenches are divided into mechanical pointer type, preset type and digital display type. Torque wrenches set the torque value through a ratchet. The ratchet mechanism is prone to wear and loss of accuracy. In addition, the ratchet needs to be rotated too many times and is laborious when setting the torque value.
[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings to provide an adjustable torque wrench, in order to achieve a more practical purpose. Utility Model Content
[0005] To address the aforementioned technical problems, this utility model provides an adjustable torque wrench to solve the issues that torque wrenches set torque values via a ratchet mechanism, which is prone to wear, reduces accuracy, and requires excessive and laborious ratchet rotation during setting.
[0006] The purpose and function of this adjustable torque wrench are achieved by the following specific technical means:
[0007] An adjustable torque wrench includes an inner core column, a wrench head passing through the top of the inner core column, the middle section of the wrench head being hinged to the top of the inner core column, an end body and a push column slidably disposed within the inner core column, the end body and the push column being connected by a spring, the end body and the wrench head being engaged by a torsion mechanism, a transmission body rotatably disposed at the bottom of the inner core column, the top of the transmission body passing through the push column and threadedly connected to the push column, a main shell being fitted over the inner core column, a handle being fitted on the main shell, at least two grooves being formed at the bottom of the main shell, an adjusting pin being disposed within one of the grooves in the handle, a gear being coaxially connected to the bottom of the transmission body, and a toothed platform being disposed within the handle for meshing with the gear.
[0008] Furthermore, the torsion mechanism includes a push roller and a limiting pin. A push cylinder is provided at the top of the end body. The top surface of the push cylinder is symmetrically inclined with the bottom surface of the plate head. A push roller is rotatably provided inside the push cylinder, and a limiting pin is rotatably provided at the bottom of the plate head. The push roller and the limiting pin abut against each other.
[0009] Furthermore, a limit rod is coaxially provided at the bottom of the gear, and a sealing seat is sleeved on the limit rod, with the diameter of the sealing seat being larger than the diameter of the gear.
[0010] Furthermore, the adjusting pin includes a hexagonal bracket set on the top surface of the toothed platform, with a protrusion on one corner of the hexagonal bracket. The protrusion is engaged in the corresponding groove, and a limit block is provided between the two grooves at the initial position and the maximum torque position at the bottom of the main housing.
[0011] Furthermore, the main shell is provided with a panel, an indicator sleeve is rotatably fitted on the main shell, a toothed ring is provided on the indicator sleeve, an inner tooth is provided on the top inner wall of the handle, and the inner tooth meshes with the toothed ring, and a torque scale bar corresponding to the panel is provided on the indicator sleeve.
[0012] Furthermore, a protective cover is fitted onto the indicator sleeve, and the protective cover is connected to the bottom triangle of the panel by a snap-fit, and the protective cover is made of transparent material.
[0013] Furthermore, the inner core column is provided with a pin hole, and the push column side wall is vertically provided with a slot, and a pin is inserted into the pin hole and locked in the slot.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. The transmission body is rotated by rotating the handle. The push column moves because it is connected to the top of the transmission body by a thread. The moving push column squeezes the spring, thereby adjusting the spring's squeezing force on the end body. When the bolt or nut is turned after the open head is installed, the plate head swings after the torque reaches a certain value. The bottom limit pin of the plate head overcomes the limit of the push roller and squeezes the end body, causing the end body to squeeze the spring downward. The limit pin is misaligned with the push roller and makes a "click" sound. The fit between the limit pin and the push roller is not easy to wear, and the torque is adjusted by the thread, so the torque adjustment is more precise and has a wider range.
[0016] 2. Through the cooperation of the groove at the bottom of the main shell and the adjustment pin inside the handle, the torque can be adjusted by pulling down and rotating the handle. After adjusting to the corresponding groove position, the handle can be pushed up to complete the adjustment. Multiple torque ranges can be adjusted within a week, making it faster and more convenient. Attached Figure Description
[0017] Figure 1 This is a perspective view of an adjustable torque wrench according to the present invention.
[0018] Figure 2 This is an exploded view of an adjustable torque wrench according to this utility model.
[0019] Figure 3 This is a three-dimensional sectional view of an adjustable torque wrench according to this utility model.
[0020] Figure 4 This is a top-view perspective view of the handle in this utility model.
[0021] Figure 5 This is a cross-sectional view of the handle in this utility model.
[0022] Figure 6 This is an exploded view of an adjustable torque wrench according to this utility model from another angle.
[0023] Figure 7 This is a schematic diagram of the structure of the main shell and the pusher column in this utility model.
[0024] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0025] 1. Handle; 2. Internal gear; 3. Protective cover; 4. Transmission body; 5. Panel; 6. Main shell; 7. Inner core column; 8. End body; 9. Plate head; 10. Spring; 11. Push column; 12. Sealing seat; 13. Slot; 14. Pin hole; 101. Gear platform; 102. Protrusion; 401. Gear; 601. Indicator sleeve; 602. Groove; 603. Limiting block; 604. Gear ring; 801. Push cylinder; 802. Push roller; 901. Limiting pin. Detailed Implementation
[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] Example:
[0030] As attached Figure 1 To be continued Figure 7 As shown:
[0031] This utility model provides an adjustable torque wrench, including an inner core column 7, a wrench head 9 passing through the top of the inner core column 7, the middle section of the wrench head 9 being hinged to the top of the inner core column 7, a hinge shaft (not shown) passing through the inside of the top of the inner core column 7, the wrench head 9 being sleeved on the hinge shaft, and a mounting sleeve being provided on the wrench head 9 at the front end of the hinge shaft for securing different types of open heads, the bottom end of the wrench head 9 extending inside the inner core column 7, and the size of the wrench head 9 being smaller than the internal space size of the inner core column 7, allowing the wrench head 9 to move slightly around the hinge shaft during use;
[0032] The inner core column 7 has an end body 8 and a push column 11 slidably arranged inside it. The end body 8 and the push column 11 are connected by a spring 10. The end body 8 and the plate head 9 are connected by a torsion mechanism. The end body 8 restricts the plate head 9 from swinging relative to each other inside the inner core column 7. Swinging can only occur when a certain torque is exceeded. This can remind the operator whether the set torque value has been reached when using the tool.
[0033] A transmission body 4 is rotatably mounted at the bottom of the inner core column 7. The top of the transmission body 4 passes through the push column 11 and is threadedly connected to the push column 11. The transmission body 4 can rotate within the inner core column 7 but cannot slide. In this embodiment, the transmission body 4 includes an outer sleeve and an inner rod that can rotate within the outer sleeve. The outer sleeve is fixed to the inner core column 7 by a pin. One end of the inner rod extends out of the outer sleeve and is threaded, while the other end extends out of the outer sleeve from below and connects to the gear 401. A main shell 6 is fitted around the outer periphery of the inner core column 7, and the main shell 6 is fixedly connected to the inner core column 7.
[0034] A handle 1 is fitted onto the main shell 6. At least two grooves 602 are formed at the bottom of the main shell 6. An adjusting pin is provided inside the handle 1, which is engaged in one of the grooves 602. Figure 4 and Figure 5 As shown, the adjusting pin includes a hexagonal bracket set on the top surface of the toothed platform 101. A protrusion 102 is provided on one corner of the hexagonal bracket, and the protrusion 102 is engaged in a corresponding groove 602. Figure 7As shown, five grooves 602 are provided, corresponding to five different torque values. A limit block 603 is provided between the two grooves 602 at the initial position and the maximum torque position on the bottom of the main housing 6. A gear 401 is coaxially connected to the bottom of the transmission body 4. A toothed platform 101 meshes with the gear 401 inside the handle 1. A limit rod is coaxially provided at the bottom of the gear 401, and a sealing seat 12 is sleeved on the limit rod. The diameter of the sealing seat 12 is larger than the diameter of the gear 401. The toothed platform 101 inside the handle 1 can move between the sealing seat 12 and the transmission body. The gear 401 between the body 4 and the outer sleeve slides. When the handle 1 moves down, the bottom of the toothed platform 101 contacts the sealing seat 12. The protrusion 102 leaves the groove 602 but is still restricted by the limiting block 603. At this time, the protrusion 102 can move in a circumferential direction away from the limiting block 603. That is, rotate the handle 1 until the protrusion 102 rotates one revolution and abuts against the other end of the limiting block 603. During this revolution, the protrusion 102 can correspond to any groove 602. Moving the handle 1 up will allow the protrusion 102 to be inserted into the corresponding groove 602 to complete the adjustment.
[0035] During this process, the rotation of handle 1 drives the rotation of transmission block 4. The push column 11, which is threadedly connected to the top of transmission block 4, moves upward due to the limited rotation. The push column 11 then pushes the spring 10, causing the spring 10 to be compressed. The spring 10 transmits the pressure to the end body 8. The plate head 9 then needs to overcome a greater swing force to push the end body 8 to make a "click" sound to indicate that the torque has reached the predetermined value.
[0036] like Figure 6 and Figure 7 As shown, the inner core column 7 is provided with a pin hole 14, and the push column 11 has a slot 13 vertically opened on its side wall. A pin (not shown) passes through the pin hole 14 and is locked in the slot 13. The pin restricts the rotation of the push column 11, so that the push column 11 can only move up and down within the range of the slot 13.
[0037] The reason it makes a "click" sound is due to the design of the torsion mechanism, such as... Figure 2As shown, the torsion mechanism includes a push roller 802 and a limiting pin 901. A push cylinder 801 is provided at the top of the end body 8. The top surface of the push cylinder 801 is symmetrically inclined with the bottom surface of the plate head 9. The push roller 802 is rotatably arranged inside the push cylinder 801, and the limiting pin 901 is rotatably arranged at the bottom of the plate head 9. The push roller 802 and the limiting pin 901 abut against each other. Because of the abutment, the limiting pin 901 needs to swing slightly to move the push roller 802. This requires a certain torque to overcome the pressure of the spring 10, so that the spring 10 will be compressed and deformed, thereby pushing the push roller 802. 2. When the limiting pin 901 reaches the top surface of the push roller 80 from one side of the push roller 802, the push roller 802 hits the inclined bottom of the plate head 9 and makes a sound. At this time, the plate head 9 swings to its maximum range, indicating that the torque has reached the predetermined value. When the plate head 9 stops twisting, the spring 10 rebounds and squeezes the push roller 802, and the push roller 802 returns to the side of the limiting pin 901. Since part of the limiting pin 901 is embedded in the inclined bottom surface of the plate head 9, the push roller 802 hits the inclined bottom surface of the plate head 9 again when it returns to one side, and the two sounds form a "click" sound.
[0038] To enable operators to adjust torque more quickly and clearly, a panel 5 is provided on the main housing 6. An indicator sleeve 601 is rotatably fitted on the main housing 6, and a toothed ring 604 is provided on the indicator sleeve 601. An internal tooth 2 is provided on the inner wall of the top of the handle 1, and the internal tooth 2 meshes with the toothed ring 604. Within the range of the up and down movement of the handle 1, the internal tooth 2 remains engaged with the toothed ring 604. A torque scale bar corresponding to the panel is provided on the indicator sleeve 601. In this embodiment, the panel 5 is provided with five different colored torque symbols, and the indicator sleeve 601 is located on the toothed ring 604. The upper circumference of ring 604 is provided with a color bar corresponding to the torque diagram. When the handle 1 is pulled down, the color bar on the indicator sleeve 601 is exposed, and the bottom of the panel 5 is triangular and points directly to the indicator sleeve 601. During the rotation of handle 1, the indicator sleeve 601 rotates accordingly, and different color bars can pass through the triangular indicator at the bottom of the panel 5. When it is necessary to adjust the torque of a certain color, rotate the corresponding color bar to the bottom of the panel 5, and then move the handle 1 up. At this time, the protrusion 102 also fits into the corresponding groove 602, thus completing the adjustment of the torque preset value.
[0039] The indicator sleeve 601 is fitted with a protective cover 3, which is connected to the bottom triangle of the panel 5. The protective cover 3 is made of transparent material and can protect the color strip from contamination after long-term use.
[0040] The groove 602, protrusion 102, limit block 603, indicator sleeve 601, and panel 5 work together to enable the operator to make precise adjustments to multiple torques within one rotation of handle 1, making it faster and more convenient. At the same time, the torque can be adjusted by the compression force of spring 10, which allows for a wider range of adjustable torques.
[0041] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. An adjustable torque wrench, characterized in that: The device includes an inner core column (7), with a plate head (9) passing through its top. The middle section of the plate head (9) is hinged to the top of the inner core column (7). An end body (8) and a push column (11) are slidably disposed inside the inner core column (7). The end body (8) and the push column (11) are connected by a spring (10). The end body (8) and the plate head (9) are engaged by a torsion mechanism. A transmission body (4) is rotatably disposed at the bottom of the inner core column (7). The top of the transmission body (4) passes through the push column. The inner core column (7) is threadedly connected to the push column (11). The inner core column (7) is covered with a main shell (6). The main shell (6) is fitted with a handle (1). The bottom of the main shell (6) is provided with at least two grooves (602). The handle (1) is provided with an adjusting pin that is locked in one of the grooves (602). The bottom of the transmission body (4) is coaxially connected to a gear (401). The handle (1) is provided with a toothed platform (101) that meshes with the gear (401).
2. An adjustable torque wrench as described in claim 1, characterized in that: The torsion mechanism includes a push roller (802) and a limiting pin (901). The top of the end body (8) is provided with a push cylinder (801). The top surface of the push cylinder (801) is symmetrically inclined with the bottom surface of the plate head (9). The push roller (802) is rotatably arranged inside the push cylinder (801). The bottom of the plate head (9) is rotatably provided with a limiting pin (901). The push roller (802) and the limiting pin (901) abut against each other.
3. An adjustable torque wrench as described in claim 1, characterized in that: A limiting rod is coaxially provided at the bottom of the gear (401), and a sealing seat (12) is sleeved on the limiting rod, and the diameter of the sealing seat (12) is larger than the diameter of the gear (401).
4. An adjustable torque wrench as described in claim 1, characterized in that: The adjusting pin includes a hexagonal frame set on the top surface of the toothed platform (101), and a protrusion (102) is provided on one corner of the hexagonal frame. The protrusion (102) is engaged in the corresponding groove (602), and a limit block (603) is provided between the two grooves (602) at the initial position and the maximum torque position at the bottom of the main shell (6).
5. An adjustable torque wrench as described in claim 1, characterized in that: The main shell (6) is provided with a panel (5), and an indicator sleeve (601) is rotatably sleeved on the main shell (6). A toothed ring (604) is provided on the indicator sleeve (601). An internal tooth (2) is provided on the inner wall of the top of the handle (1), and the internal tooth (2) meshes with the toothed ring (604). A torque scale bar corresponding to the panel is provided on the indicator sleeve (601).
6. An adjustable torque wrench as described in claim 5, characterized in that: The indicator sleeve (601) is fitted with a protective cover (3), which is connected to the bottom triangle of the panel (5) and is made of transparent material.
7. An adjustable torque wrench as described in claim 1, characterized in that: The inner core column (7) is provided with a pin hole (14), and the push column (11) has a vertical slot (13) on its side wall. A pin is inserted into the pin hole (14) and locked in the slot (13).