Adjustable torque wrench
The adjustable torque wrench addresses the inefficiencies of traditional wrenches by using a handle and gear-spring mechanism for precise and efficient torque adjustment with reduced wear and labor, enabling quick and accurate settings.
Patent Information
- Application Number
- CN202510717645.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2025-07-15
AI Technical Summary
The ratchet mechanism of existing torque wrench is prone to wear, the accuracy is reduced, and the number of rotations is too many and laborious when setting torque.
The inner core column, push column, spring and transmission body structure is adopted. The transmission body is rotated by the handle and the push column moves and extrusion spring to adjust the torque. Combined with the limit pin and push roller design, the torque is precisely adjusted, and rapid adjustment is achieved through the cooperation of grooves and adjustment pins.
It improves the accuracy and convenience of torque adjustment, reduces wear of the ratchet mechanism, and achieves a larger torque range and faster adjustment.
Smart Images
Figure CN120307229A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of mechanical tools, and more specifically, particularly relates to an adjustable torque wrench. Background Art
[0002] A wrench is a commonly used manual tool for screws and nuts in mechanical assembly, repair, etc. For some assembly and repair operations that require a certain amount of torque, the torque wrench was developed. A torque wrench is a manual tool used to accurately apply and control torque, and is widely used in fields such as mechanical assembly, automotive repair, aerospace, and industrial manufacturing to ensure that fasteners such as bolts and nuts reach the specified tightening force and avoid safety hazards caused by over-tightening or over-loosening.
[0003] Current torque wrenches are divided into mechanical pointer type, preset type, and digital display type. The torque wrench sets the torque value through a ratchet. The ratchet mechanism is prone to wear, resulting in a decrease in accuracy, and it is also time-consuming and laborious to rotate the ratchet a large number of turns when setting.
[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an adjustable torque wrench is provided with the expectation of achieving a more practical value. Summary of the Invention
[0005] In order to solve the above technical problems, the present invention provides an adjustable torque wrench to solve the problems that the torque wrench sets the torque value through a ratchet, the ratchet mechanism is prone to wear, the accuracy decreases, and it is time-consuming and laborious to rotate the ratchet a large number of turns when setting.
[0006] The purpose and effect of an adjustable torque wrench of the present invention are achieved by the following specific technical means:
[0007] An adjustable torque wrench includes an inner core column. A socket head is penetrated through the top of the inner core column. The middle section of the socket head is hinged to the top of the inner core column. An end body and a push column are slidably arranged in the inner core column. The end body and the push column are connected by a spring. The end body and the socket head are cooperated by a twisting mechanism. A transmission body is rotatably arranged at the bottom of the inner core column. The top of the transmission body penetrates into the push column and is threadedly connected to the push column. A main housing is sleeved outside the inner core column. A handle is sleeved on the main housing. At least two grooves are opened at the bottom of the main housing. An adjusting pin is arranged in the handle and is clamped in one of the grooves. A gear is coaxially connected to the bottom of the transmission body. A toothed groove platform meshing with the gear is arranged in the handle.
[0008] Further, the twisting mechanism includes a push roller and a limit pin. A push cylinder is arranged at the top of the end body. The top surface of the push cylinder and the bottom surface of the socket head are symmetrically inclined. A push roller is rotatably arranged in the push cylinder. A limit pin is rotatably arranged at the bottom of the socket head. The push roller and the limit pin are abutted in an off - position.
[0009] Furthermore, a limiting rod is coaxially arranged at the bottom of the gear, a sealing seat is sleeved on the limiting rod, and the diameter of the sealing seat is larger than the diameter of the gear.
[0010] Furthermore, the adjusting pin includes a hexagonal frame arranged on the top surface of the tooth groove platform, one corner of the hexagonal frame is provided with a protrusion, the protrusion is clamped in the corresponding groove, and a limit block is provided between the two grooves of the initial position and the maximum torque position set at the bottom of the main shell.
[0011] Furthermore, a panel is provided on the main shell, an indicator sleeve is provided on the rotating sleeve of the main shell, a toothed ring is provided on the indicator sleeve, internal teeth are provided on the inner wall of the top of the handle, and the internal teeth are meshed 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 provided on the indicating sleeve, the protective cover is connected with the bottom of the panel in a triangular snap-fit manner, and the protective cover is made of a transparent material.
[0013] Furthermore, a latch hole is provided on the inner core column, a clamping slot is vertically opened on the side wall of the push column, and a latch is passed through the latch hole and clamped in the clamping slot.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. The transmission body is driven to rotate by rotating the handle. The push column moves due to the threaded connection with the top of the transmission body. The moving push column squeezes the spring to adjust the squeezing force of the spring on the end body. When the plate head is installed with the open head and the bolt or nut is pulled, the torque reaches a certain value and the plate head swings. The limit pin at the bottom of the plate head overcomes the limit of the push roller to squeeze the end body, so that the end body squeezes the spring downward, and the limit pin offsets the push roller to make a "click" sound. The cooperation 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 delicate and has a larger range.
[0016] 2. Through the cooperation of the groove at the bottom of the main shell and the adjustment pin in the handle, the handle can be pulled down and then rotated to adjust the torque, and after adjusting to the corresponding groove position, the handle can be pushed up to complete the adjustment. Multiple ranges of torque adjustment can be completed within a week, which is faster and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model is a stereoscopic diagram of an adjustable torque wrench of the present invention.
[0018] Figure 2 It is an exploded view of an adjustable torque wrench of the present invention.
[0019] Figure 3 The utility model is a three-dimensional cross-sectional view of an adjustable torque wrench of the present invention.
[0020] Figure 4It is a perspective view of the top side of the handle in the present invention.
[0021] Figure 5 It is a structural sectional view of the handle in the present invention.
[0022] Figure 6 It is an exploded view of other angles of an adjustable torque wrench according to the present invention.
[0023] Figure 7 It is a structural schematic diagram of the main housing and the push column in the present invention.
[0024] In the figure, the corresponding relationship between the component names and the drawing reference numbers is as follows:
[0025] 1. Handle; 2. Internal teeth; 3. Protective cover; 4. Transmission body; 5. Panel; 6. Main housing; 7. Inner core column; 8. End body; 9. Bit head; 10. Spring; 11. Push column; 12. Sealing seat; 13. Card slot; 14. Pin hole; 101. Tooth groove platform; 102. Protrusion; 401. Gear; 601. Indicator sleeve; 602. Groove; 603. Limit block; 604. Tooth ring; 801. Push cylinder; 802. Push roller; 901. Limit pin. Detailed implementation manners
[0026] The following further describes in detail the implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0027] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is 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, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0029] Embodiment:
[0030] As shown in the attached Figure 1To the appendix Figure 7 As shown in
[0031] The present invention provides an adjustable torque wrench, which includes an inner core column 7. A socket head 9 is penetrated through the top of the inner core column 7. The middle section of the socket head 9 is hinged to the top of the inner core column 7. An articulated shaft (not shown in the figure) horizontally penetrates through the top end inside the inner core column 7. The socket head 9 is sleeved on the articulated shaft. And an installation sleeve is arranged at the front end of the articulated shaft on the socket head 9 for clamping open heads of different models. The bottom end of the socket head 9 extends inside the inner core column 7, and the size of the socket head 9 is smaller than the internal space size of the inner core column 7. When in use, the socket head 9 can slightly swing around the articulated shaft within the moving range;
[0032] A end body 8 and a push column 11 are slidably arranged 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 socket head 9 are cooperated through a twisting mechanism. The end body 8 restricts the relative swing of the socket head 9 inside the inner core column 7, and it can only swing when the torque exceeds a certain value, so as to remind the operator whether the set torque value is reached when using the tool;
[0033] A transmission body 4 is rotatably arranged at the bottom of the inner core column 7. The top of the transmission body 4 penetrates into the push column 11 and is threadedly connected to the push column 11. The transmission body 4 can rotate but cannot slide inside the inner core column 7. In this embodiment, the transmission body 4 includes an outer sleeve and an inner rod that can rotate inside the outer sleeve. The outer sleeve is fixed inside the inner core column 7 by a pin. One end of the inner rod extends out of the outer sleeve to form a thread, and the other end extends out of the outer sleeve from below to connect a gear 401. A main shell 6 is sleeved on the outer periphery of the inner core column 7. The main shell 6 is fixedly connected to the inner core column 7;
[0034] A handle 1 is sleeved on the main shell 6. At least two grooves 602 are opened at the bottom of the main shell 6. An adjusting pin that is clamped in one of the grooves 602 is arranged inside the handle 1. As Figure 4 and Figure 5 shown, the adjusting pin includes a hexagonal frame arranged on the top surface of the tooth groove platform 101. One of the corners of the hexagonal frame is provided with a protrusion 102. The protrusion 102 is clamped in the corresponding groove 602. As Figure 7As shown, there are five grooves 602, corresponding to five different torque values. A limiting block 603 is provided between the two grooves 602 at the initial position and the maximum torque position provided at the bottom of the main housing 6. The bottom of the transmission body 4 is coaxially connected with a gear 401. A toothed groove platform 101 meshing with the gear 401 is provided inside the handle 1. A limiting rod is coaxially provided at the bottom of the gear 401. 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. The toothed groove platform 101 inside the handle 1 can slide on the gear 401 between the sealing seat 12 and the outer sleeve of the transmission body 4. When the handle 1 moves downward and the bottom of the toothed groove 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 the circumferential direction away from the limiting block 603, that is, rotate the handle 1 until the protrusion 102 rotates one week and abuts against the other end of the limiting block 603. During this one-week process, the protrusion 102 can correspond to any one of the grooves 602. Moving the handle 1 upward can make the protrusion 102 snap into the corresponding groove 602 to complete the adjustment;
[0035] During this process, rotating the handle 1 drives the transmission block 4 to rotate. Since the rotation of the push post 11 threadedly connected to the top of the transmission block 4 is restricted, it moves upward. The push post 11 pushes the spring 10, causing the spring 10 to be compressed. The spring 10 transfers the pressure to the end body 8. The bit head 9 needs to overcome a greater swinging force to be able to push the end body 8 to make a "click" sound to indicate that the torque reaches the predetermined value.
[0036] As Figure 6 and Figure 7 shown, a pin hole 14 is provided on the inner core column 7. A clamping groove 13 is vertically opened on the side wall of the push post 11. A pin (not shown in the figure) is inserted into the pin hole 14 and clamped in the clamping groove 13. The pin restricts the rotation of the push post 11, so that the push post 11 can only move up and down within the range of the clamping groove 13.
[0037] The reason for being able to make a "click" sound is the design of the twisting mechanism, as Figure 2As shown, the torsion mechanism includes a push roller 802 and a limit pin 901. A push cylinder 801 is arranged on 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. A push roller 802 is rotatably arranged in the push cylinder 801, and a limit pin 901 is rotatably arranged at the bottom of the plate head 9. The push roller 802 and the limit pin 901 are off-positioned and abutted. Due to the off-position abutment, the limit pin 901 needs to swing slightly to push the push roller 802. It needs to reach a certain torque to overcome the pressure of the spring 10, so that the spring 10 is squeezed and deformed to push the push roller 80 2. When the limit pin 901 reaches the top surface of the push roller 80 from one side of the push roller 802, the push roller 802 just hits the inclined bottom of the board head 9 and makes a sound. At this time, the swing of the board head 9 reaches the maximum range, indicating that the torque has reached the predetermined value. When the board head 9 is no longer twisted, the spring 10 rebounds and squeezes the push roller 802, and the push roller 802 returns to the side of the limit pin 901 again. Since a part of the limit pin 901 is embedded in the inclined surface at the bottom of the board head 9, the push roller 802 hits the inclined surface at the bottom of the board head 9 again when it returns to one side, and the two sounds form a "click" sound.
[0038] In order to enable the operator to adjust the torque more quickly and clearly, a panel 5 is provided on the main shell 6, an indicator sleeve 601 is rotatably provided on the main shell 6, a toothed ring 604 is provided on the indicator sleeve 601, an inner tooth 2 is provided on the inner wall of the top of the handle 1, and the inner tooth 2 is meshed with the toothed ring 604. Within the range of the up and down movement of the handle 1, the inner tooth 2 remains meshed with the toothed ring 604, and a torque scale bar corresponding to the panel is provided on the indicator sleeve 601. In this embodiment, five torque icons of different colors are provided on the panel 5, and the indicator sleeve 601 is located at the toothed ring 604. The upper circumference of the 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 leaks out, and the bottom of the panel 5 is in a triangle pointing directly to the indicator sleeve 601. During the rotation of the handle 1, the indicator sleeve 601 rotates accordingly, and different color bars can pass through the triangle indication at the bottom of the panel 5. When the torque of a certain color needs to be adjusted, the corresponding color bar is rotated to the bottom of the panel 5, and then the handle 1 is moved up. At this time, the protrusion 102 is just stuck in the corresponding groove 602, and the adjustment of the torque preset value is completed.
[0039] A protective cover 3 is provided on the indicator sleeve 601, and the protective cover 3 is connected to the bottom of the panel 5 by triangular snap-fitting. The protective cover 3 is made of transparent material, and the protective cover 3 can protect the color strip from being contaminated after long-term use.
[0040] The groove 602, the protrusion 102 and the limit block 603, the indicator sleeve 601 and the panel 5, several designs cooperate with each other to enable the operator to complete the precise adjustment of multiple torques within one rotation of the handle 1, which is faster and more convenient. At the same time, the torque is adjusted by adjusting the squeezing force of the spring 10, and the adjustable torque range is larger.
[0041] The embodiments of the present invention are provided by way of example and description, and are not exhaustive or limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the present invention and its practical application, and to enable those of ordinary skill in the art to understand the present invention so as to design various embodiments with various modifications suitable for a particular purpose.
Claims
1. An adjustable torque wrench, characterized in that: It includes an inner core column (7). A plate head (9) is penetrated through the top of the inner core column (7). 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 arranged in 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 cooperated by a twisting mechanism. A transmission body (4) is rotatably arranged at the bottom of the inner core column (7). The top of the transmission body (4) is penetrated into the push column (11) and is threadedly connected to the push column (11). A main shell (6) is sleeved outside the inner core column (7). A handle (1) is sleeved on the main shell (6). At least two grooves (602) are opened at the bottom of the main shell (6). An adjusting pin is arranged in the handle (1) and is clamped in one of the grooves (602). A gear (401) is coaxially connected to the bottom of the transmission body (4). A tooth groove platform (101) meshing with the gear (401) is arranged in the handle (1).
2. The adjustable torque wrench according to claim 1, wherein: The twisting mechanism includes a push roller (802) and a limit pin (901). A push cylinder (801) is arranged at the top of the end body (8). The top surface of the push cylinder (801) and the bottom surface of the plate head (9) are symmetrically inclined. A push roller (802) is rotatably arranged in the push cylinder (801). A limit pin (901) is rotatably arranged at the bottom of the plate head (9). The push roller (802) and the limit pin (901) are abutted in an off - position manner.
3. The adjustable torque wrench according to claim 1, wherein: A limit rod is coaxially arranged at the bottom of the gear (401). A sealing seat (12) is sleeved on the limit rod, and the diameter of the sealing seat (12) is larger than the diameter of the gear (401).
4. An adjustable torque wrench according to claim 1, characterized in that: The adjusting pin includes a hexagonal frame arranged on the top surface of the tooth groove platform (101). A protrusion (102) is arranged at one of the corners of the hexagonal frame. The protrusion (102) is clamped in the corresponding groove (602). A limit block (603) is arranged between the two grooves (602) at the initial position and the maximum torque position arranged at the bottom of the main shell (6).
5. The adjustable torque wrench according to claim 1, characterized in that: A panel (5) is arranged on the main shell (6). An indicating sleeve (601) is rotatably sleeved on the main shell (6). A tooth ring (604) is arranged on the indicating sleeve (601). Inner teeth (2) are arranged on the inner wall of the top of the handle (1), and the inner teeth (2) are meshed with the tooth ring (604). A torque scale bar corresponding to the panel is arranged on the indicating sleeve (601).
6. The adjustable torque wrench according to claim 5, wherein: A protective cover (3) is sleeved on the indicating sleeve (601). The protective cover (3) is connected to the bottom triangle of the panel (5) in a clamping manner, and the protective cover (3) is made of a transparent material.
7. An adjustable torque wrench according to claim 1, characterized in that: A pin hole (14) is arranged on the inner core column (7). A card slot (13) is vertically opened on the side wall of the push column (11). A pin is penetrated through the pin hole (14) and is clamped in the card slot (13).