Torsion screwdriver

Abstract

The utility model discloses a torsion screwdriver. The torsion screwdriver comprises a handle with a mounting cavity inside; at least part of the ratchet wheel assembly is arranged in the mounting cavity; the front end of the screwdriver head is used for being matched with a fastener to be screwed, and the screwdriver head is connected with the ratchet wheel assembly; the elastic piece is elastically connected with the ratchet wheel assembly, and the elastic piece has elastic restoring force enabling the ratchet wheel assembly to be kept in the joint state. According to the torsion screwdriver provided by the embodiment of the utility model, the structure is simpler, the assembly can be realized only by connecting the ratchet wheel assembly with the screwdriver head and then mounting the ratchet wheel assembly and the screwdriver head in the mounting cavity of the handle, and then elastically connecting the elastic piece with the ratchet wheel assembly, and the assembly process is simpler and more convenient, so that the torsion screwdriver is more convenient to produce and assemble.

Description

Technical Field

[0001] The utility model relates to the field of screwdrivers, and particularly to a torque screwdriver. Background Art

[0002] A torque screwdriver is a screwdriver that can preset a torque threshold. When tightening a fastener with a torque screwdriver, if the tightening of the fastener reaches the torque threshold, the rotation of the torque screwdriver around the axis will no longer drive the fastener to continue rotating, achieving the control of tightening the fastener to an appropriate degree and avoiding over-tightening or under-tightening.

[0003] Currently, some torque screwdrivers have a relatively complex structure, which is not convenient for production and assembly. Summary of the Utility Model

[0004] The utility model provides a torque screwdriver, which can achieve the purpose of tightening a fastener to a target torque with a more concise structure, is more convenient for production and assembly, and greatly reduces the cost.

[0005] In a first aspect, an embodiment of the utility model provides a torque screwdriver, which includes: a handle with an installation cavity inside; a ratchet assembly, at least part of which is arranged in the installation cavity; a screwdriver bit, the front end of the screwdriver bit is used to cooperate with a fastener to be screwed, and the screwdriver bit is connected to the ratchet assembly; an elastic member, elastically connected to the ratchet assembly, and the elastic member has an elastic restoring force that keeps the ratchet assembly in an engaged state.

[0006] The torque screwdriver according to the embodiment of the utility model includes a handle, a ratchet assembly, a screwdriver bit and an elastic member. The ratchet assembly is arranged in the installation cavity of the handle, the screwdriver bit is connected to the ratchet assembly, and the elastic member is elastically connected to the ratchet assembly. When it is necessary to tighten a fastener, the front end of the screwdriver bit cooperates with the fastener to be screwed, and the handle is rotated along a first direction. At this time, the ratchet assembly drives the connection between the handle and the screwdriver bit, and the screwdriver bit rotates to tighten the fastener along the first direction. When the tightening of the fastener reaches the preset torque threshold, the ratchet assembly no longer transmits the rotation of the handle to the fastener. Although the handle rotates, the fastener no longer continues to rotate, achieving the tightening of the fastener to the target torque, thereby achieving the control of tightening the fastener to an appropriate degree and avoiding over-tightening or under-tightening. The structure of the above torque screwdriver is more concise. It only needs to connect the ratchet assembly to the screwdriver bit and then install it in the installation cavity of the handle, and then elastically connect the elastic member to the ratchet assembly to complete the assembly. The assembly process is more convenient, so it is more convenient for the production and assembly of the torque screwdriver.

[0007] According to the foregoing embodiments of the first aspect of the present utility model, the torque screwdriver further includes: an adjusting member, which is partially located in the installation cavity and partially exposed from one end of the handle, and the elastic member is elastically connected between the adjusting member and the ratchet assembly. Wherein, the adjusting member can move in a direction close to or away from the ratchet assembly, so that the pressure exerted by the elastic member on the ratchet assembly changes. In the torque screwdriver of the above embodiment, the elastic member is elastically connected between the adjusting member and the ratchet assembly, and the adjusting member can move in a direction close to or away from the ratchet assembly, so that the pressure exerted by the elastic member on the ratchet assembly changes, thereby changing the preset torque threshold, making the torque screwdriver more convenient to be used in a variety of tightening scenarios. The adjusting member is partially located in the installation cavity and partially exposed from one end of the handle. Therefore, only by adjusting the adjusting member outside the handle can the adjustment of the preset torque threshold be realized, and it is not necessary to disassemble some components of the torque screwdriver to adjust the torque threshold, which improves the convenience of adjusting the torque threshold.

[0008] According to any one of the foregoing embodiments of the first aspect of the present utility model, the ratchet assembly includes a fixed ratchet tooth structure and a moving ratchet. The screwdriver bit is connected to the moving ratchet to be able to rotate synchronously around the axis. The moving ratchet includes a moving ratchet tooth structure that cooperates with the fixed ratchet tooth structure. The adjusting member can move in a direction close to or away from the ratchet assembly, so that the extrusion force between the fixed ratchet tooth structure and the moving ratchet tooth structure changes.

[0009] According to any one of the foregoing embodiments of the first aspect of the present utility model, the ratchet assembly is located at the front end of the handle, and the adjusting member is exposed from the rear end of the handle.

[0010] According to any one of the foregoing embodiments of the first aspect of the present utility model, the ratchet assembly includes a fixed ratchet. The fixed ratchet tooth structure is arranged on the fixed ratchet. The moving ratchet can rotate around the axis relative to the handle. The fixed ratchet is connected to the handle to be able to rotate synchronously around the axis. The elastic member is elastically connected between the adjusting member and the fixed ratchet.

[0011] According to any one of the foregoing embodiments of the first aspect of the present utility model, a circumferential limiting protrusion is provided on the inner circumferential surface of the handle, and a circumferential limiting groove is provided on the outer circumferential surface of the fixed ratchet. The circumferential limiting protrusion of the handle is inserted into the circumferential limiting groove of the fixed ratchet, so that the fixed ratchet and the handle are circumferentially limited.

[0012] According to any one of the foregoing embodiments of the first aspect of the present utility model, the screwdriver bit passes through the moving ratchet and the fixed ratchet. The adjusting member is threadedly connected to the rear end of the screwdriver bit. An abutting groove is provided on the end surface of the moving ratchet facing away from the adjusting member, and an abutting protrusion capable of abutting and cooperating with the abutting groove is provided on the outer circumference of the screwdriver bit.

[0013] According to any of the foregoing embodiments of the first aspect of the present utility model, a first groove is provided on the front end face of the handle, and a second groove is provided on the rear end face of the handle. Both the first groove and the second groove communicate with the installation cavity and form a stepped structure with the installation cavity. The moving ratchet is disposed in the first groove and can abut against the bottom of the first groove, and the adjusting member is disposed in the second groove and can abut against the bottom of the second groove.

[0014] According to any of the foregoing embodiments of the first aspect of the present utility model, the ratchet assembly is located at the rear end of the handle, and the adjusting member is exposed from the front end of the handle.

[0015] According to any of the foregoing embodiments of the first aspect of the present utility model, the rear end of the handle is closed and has a plugging portion. The fixed ratchet tooth structure is integrally provided on the inner wall of the plugging portion facing the installation cavity. The moving ratchet is rotatable about an axis relative to the handle, and the elastic member is elastically connected between the adjusting member and the moving ratchet.

[0016] According to any of the foregoing embodiments of the first aspect of the present utility model, the adjusting member is threadedly connected to the front end of the handle. The screwdriver bit passes through the adjusting member and the moving ratchet. The rear end of the screwdriver bit abuts against the plugging portion. A limiting groove is provided on one side of the moving ratchet facing the plugging portion, and a limiting protrusion is provided on the outer periphery of the screwdriver bit. The limiting protrusion is located in the limiting groove.

[0017] According to any of the foregoing embodiments of the first aspect of the present utility model, the adjusting member moves in a direction close to or away from the ratchet assembly by rotating about an axis. A pointer is provided on the surface of the adjusting member exposed from the handle, and a scale line structure is provided on the outer periphery of the end of the handle corresponding to the adjusting member.

[0018] In a second aspect, an embodiment of the present utility model provides a torque screwdriver, which includes: a handle, an installation cavity is provided inside the handle, a plugging portion is provided at the rear end of the handle, and a fixed ratchet tooth structure is provided on the inner wall of the plugging portion facing the installation cavity.

[0019] For the torque screwdriver according to the embodiment of the present utility model, the rear end of the handle has a plugging portion, and a fixed ratchet tooth structure is provided on the inner wall of the plugging portion facing the installation cavity. The structure of the above torque screwdriver is more concise. Only need to connect the moving ratchet with the screwdriver bit and then install it in the installation cavity of the handle, and then elastically connect the elastic member with the moving ratchet to achieve assembly. The assembly process is more convenient, thus making it more convenient for the production and assembly of the torque screwdriver.

[0020] According to the aforementioned embodiment of the second aspect of the utility model, the torque screwdriver also includes: a movable ratchet, cooperatively connected to the fixed ratchet tooth structure; a screwdriver head, connected to the movable ratchet; an elastic member, elastically connected to the movable ratchet, and the elastic member has an elastic restoring force that keeps the movable ratchet engaged with the fixed ratchet tooth structure.

[0021] In the above embodiment, the torque screwdriver includes a handle, a movable ratchet, a screwdriver head and an elastic member. The rear end of the handle has a blocking portion, and the blocking portion is provided with a fixed ratchet tooth structure facing the inner wall of the installation cavity. The movable ratchet is connected with the fixed ratchet tooth structure. The screwdriver head is connected with the movable ratchet, and the elastic member is elastically connected with the movable ratchet. When the fastener needs to be tightened, the front end of the screwdriver head cooperates with the fastener to be screwed, and the handle is rotated along the first direction. At this time, under the action of the elastic member, the movable ratchet and the fixed ratchet tooth structure are kept engaged, so that the handle and the screwdriver head are connected in transmission, and the screwdriver head rotates along the first direction to tighten the fastener. When the fastener is tightened to a preset torque threshold, the elastic force of the elastic member is insufficient to keep the movable ratchet of the ratchet assembly engaged with the fixed ratchet tooth structure. At this time, the rotation of the handle is no longer transmitted to the fastener. Although the handle rotates, the fastener no longer continues to rotate, so that the fastener is tightened to the target torque, thereby achieving control of tightening the fastener to an appropriate degree and avoiding over-tightening or under-tightening. The structure of the torque screwdriver is more streamlined. It only needs to connect the movable ratchet and the screwdriver head and install them in the mounting cavity of the handle, and then elastically connect the elastic member and the movable ratchet to achieve assembly. The assembly process is simpler, thereby making it easier to produce and assemble the torque screwdriver.

[0022] According to any of the aforementioned embodiments of the second aspect of the utility model, the torque screwdriver further comprises: an adjusting member connected to and exposed from the front end of the handle, the elastic member being elastically connected between the adjusting member and the movable ratchet, wherein the adjusting member can move in a direction close to or away from the blocking portion, so that the pressure of the elastic member acting on the movable ratchet changes. In the torque screwdriver of the above embodiment, the elastic member is elastically connected between the adjusting member and the movable ratchet, and the adjusting member can move in a direction close to or away from the movable ratchet, so that the pressure of the elastic member acting on the movable ratchet changes, so that the pressure of mutual compression between the movable ratchet and the fixed ratchet tooth structure changes, thereby changing the preset torque threshold, making the torque screwdriver more convenient to use in a variety of tightening scenarios. The adjusting member is exposed from the front end of the handle, so the preset torque threshold can be adjusted by only adjusting the adjusting member on the outside of the handle, and the torque threshold does not need to be disassembled to adjust some components of the torque screwdriver, which improves the convenience of adjusting the torque threshold.

[0023] According to any of the foregoing embodiments of the second aspect of the present utility model, the adjusting member is threadedly connected to the front end of the handle, and the rotation of the adjusting member around the axis relative to the handle causes the adjusting member to move closer to or away from the blocking portion.

[0024] According to any of the foregoing embodiments of the second aspect of the present utility model, the screwdriver bit passes through the adjusting member and the moving ratchet, the rear end of the screwdriver bit abuts against the blocking portion, a limiting groove is provided on one side of the moving ratchet facing the blocking portion, and a limiting protrusion is provided on the outer periphery of the screwdriver bit, and the limiting protrusion is located in the limiting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0026] Figure 1 A perspective three-dimensional schematic diagram of the first embodiment of the torque screwdriver of the present utility model;

[0027] Figure 2 Another perspective three-dimensional schematic diagram of the first embodiment of the torque screwdriver of the present utility model;

[0028] Figure 3 A three-dimensional exploded schematic diagram of the first embodiment of the torque screwdriver of the present utility model;

[0029] Figure 4 A cross-sectional schematic diagram of the first embodiment of the torque screwdriver of the present utility model;

[0030] Figure 5 A cross-sectional schematic diagram of the handle in the first embodiment of the torque screwdriver of the present utility model;

[0031] Figure 6 A three-dimensional schematic diagram of the second embodiment of the torque screwdriver of the present utility model;

[0032] Figure 7 A perspective three-dimensional schematic diagram of the third embodiment of the torque screwdriver of the present utility model;

[0033] Figure 8 Another perspective three-dimensional schematic diagram of the third embodiment of the torque screwdriver of the present utility model;

[0034] Figure 9 A three-dimensional exploded schematic diagram of the third embodiment of the torque screwdriver of the present utility model;

[0035] Figure 10 Cross-sectional schematic view of the third embodiment of the torsion screwdriver of the present utility model;

[0036] Figure 11 Half-sectional schematic view of the handle in the third embodiment of the torsion screwdriver of the present utility model;

[0037] Figure 12 Three-dimensional schematic view of the fourth embodiment of the torsion screwdriver of the present utility model;

[0038] Figure 13 Three-dimensional schematic view of the fifth embodiment of the torsion screwdriver of the present utility model;

[0039] Figure 14 Three-dimensional exploded schematic view of the fifth embodiment of the torsion screwdriver of the present utility model;

[0040] Figure 15 Cross-sectional schematic view of the fifth embodiment of the torsion screwdriver of the present utility model;

[0041] Figure 16 Half-sectional schematic view of the handle in the fifth embodiment of the torsion screwdriver of the present utility model.

[0042] Explanation of reference numerals:

[0043] 100 - Torsion screwdriver;

[0044] 110 - Handle; 111 - Installation cavity; 112 - Circumferential limit protrusion; 113 - First groove; 114 - Second groove; 115 - Scale line structure; 116 - Sealing part;

[0045] 120 - Ratchet assembly; 121 - Moving ratchet; 1211 - Moving ratchet tooth structure; 1213 - Abuttment groove; 1214 - Limit groove; 122 - Fixed ratchet; 1221 - Fixed ratchet tooth structure; 1222 - Circumferential limit groove;

[0046] 130 - Screwdriver bit; 131 - Abuttment protrusion; 132 - Limit protrusion;

[0047] 140 - Adjusting part; 141 - Pointer;

[0048] 150 - Elastic part;

[0049] X - First direction.

[0050] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0052] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0054] Figure 1 、 Figure 2 is a three-dimensional schematic diagram of different perspectives of the first embodiment of the torque screwdriver of the present utility model. Figure 3 、 Figure 4 is a three-dimensional exploded view and a cross-sectional view of the first embodiment of the torque screwdriver of the present utility model. The torque screwdriver 100 includes a handle 110, a ratchet assembly 120, a screwdriver bit 130, and an elastic member 150. The handle 110 has an installation cavity 111 inside. At least a part of the ratchet assembly 120 is disposed in the installation cavity 111. In some embodiments, the ratchet assembly 120 has an engaged state and a disengaged state. In the engaged state, the ratchet assembly 120 can achieve power transmission, and in the disengaged state, the ratchet assembly 120 disconnects the power transmission. The front end of the screwdriver bit 130 is used to cooperate with the fastener to be screwed, and the rear end of the screwdriver bit 130 is connected to the ratchet assembly 120. In this embodiment, the screwdriver bit 130 extends along the first direction X. The elastic member 150 is elastically connected to the ratchet assembly 120, and the elastic member 150 has an elastic restoring force that keeps the ratchet assembly 120 in the engaged state.

[0055] According to the torsion screwdriver 100 of an embodiment of the present utility model, it includes a handle 110, a ratchet assembly 120, a screwdriver bit 130, and an elastic member 150. The ratchet assembly 120 is disposed in the installation cavity 111 of the handle 110, and the screwdriver bit 130 is connected to the ratchet assembly 120. When it is necessary to tighten a fastener, the front end of the screwdriver bit 130 cooperates with the fastener to be turned, and the handle 110 is rotated along a first direction. At this time, the ratchet assembly 120 transmits and connects the handle 110 and the screwdriver bit 130, and the screwdriver bit 130 rotates to tighten the fastener along the first direction. When the tightening of the fastener reaches a preset torque threshold, the ratchet assembly 120 no longer transmits the rotation of the handle 110 to the fastener. Although the handle 110 rotates, the fastener no longer continues to rotate, realizing the control of tightening the fastener to an appropriate degree and avoiding over-tightening or under-tightening. The structure of the above torsion screwdriver 100 is more concise. Only need to connect the ratchet assembly 120 and the screwdriver bit 130 and then install them in the installation cavity 111 of the handle, and then elastically connect the elastic member 150 with the ratchet assembly 120 to complete the assembly. The assembly process is more convenient, thus making it more convenient for the production and assembly of the torsion screwdriver 100.

[0056] In some embodiments, the torsion screwdriver 100 further includes an adjusting member 140. The adjusting member 140 is partially located in the installation cavity 111 and partially exposed from one end of the handle 110. The elastic member 150 is elastically connected between the adjusting member 140 and the ratchet assembly 120. In this embodiment, the adjusting member 140 can move in a direction close to or away from the ratchet assembly 120, so that the pressure exerted by the elastic member 150 on the ratchet assembly 120 changes.

[0057] In the torsion screwdriver 100 of the above embodiment, the elastic member 150 is elastically connected between the adjusting member 140 and the ratchet assembly 120. The adjusting member 140 can move in a direction close to or away from the ratchet assembly 120, so that the pressure exerted by the elastic member 150 on the ratchet assembly 120 changes, thereby changing the preset torque threshold, making the torsion screwdriver 100 more convenient for use in various tightening scenarios. The adjusting member 140 is partially located in the installation cavity 111 and partially exposed from one end of the handle 110. Therefore, only need to adjust the adjusting member 140 outside the handle 110 to adjust the preset torque threshold. There is no need to disassemble some components of the torsion screwdriver 100 to adjust the torque threshold, improving the convenience of adjusting the torque threshold.

[0058] In some embodiments, the ratchet assembly 120 includes a fixed ratchet tooth structure 1221 and a movable ratchet 121. The screwdriver bit 130 is connected to the movable ratchet 121 to be rotatable synchronously about an axis. The movable ratchet 121 includes a movable ratchet tooth structure 1211 that cooperates with the fixed ratchet tooth structure 1221. The adjusting member 140 can move in a direction closer to or farther from the ratchet assembly 120, so that the extrusion force between the fixed ratchet tooth structure 1221 and the movable ratchet tooth structure 1211 is changed. During the process of tightening the fastener, when the handle 110 rotates in the first direction and the tightening degree has not reached the torque threshold, a transmission fit is formed between the fixed ratchet tooth structure 1221 and the movable ratchet tooth structure 1211, and the rotation of the handle 110 in the first direction drives the fixed ratchet tooth structure 1221, the movable ratchet 121, the screwdriver bit 130, and the fastener to rotate synchronously; when the handle 110 rotates in the first direction and the tightening degree has reached the torque threshold, a tooth skipping phenomenon occurs between the fixed ratchet tooth structure 1221 and the movable ratchet tooth structure 1211, and the rotation of the handle 110 in the first direction can no longer drive the screwdriver bit 130 to rotate, so that the fastener is tightened to an appropriate degree. The change in the extrusion force between the fixed ratchet tooth structure 1221 and the movable ratchet tooth structure 1211 changes the magnitude of the external force required for the tooth skipping phenomenon to occur between the fixed ratchet tooth structure 1221 and the movable ratchet tooth structure 1211, thereby adjusting the magnitude of the preset torque threshold. During the process of loosening the fastener, the handle 110 rotates in the second direction, and a transmission fit is always formed between the fixed ratchet tooth structure 1221 and the movable ratchet tooth structure 1211. The rotation of the handle 110 in the second direction drives the fixed ratchet tooth structure 1221, the movable ratchet 121, the screwdriver bit 130, and the fastener to rotate synchronously, thereby loosening the fastener.

[0059] In some embodiments, the ratchet assembly 120 is located at the front end of the handle 110, and the adjusting member 140 is exposed from the rear end of the handle 110. Therefore, by adjusting the adjusting member 140 exposed from the rear end of the handle 110, the preset torque threshold of the torque screwdriver 100 can be adjusted.

[0060] In some embodiments, an adjustment groove is provided on the surface of the adjusting member 140 exposed from the handle 110. For example, the adjustment groove is a polygonal groove.

[0061] In this embodiment, the ratchet assembly 120 includes a fixed ratchet 122. The fixed ratchet tooth structure 1221 is provided on the fixed ratchet 122. The movable ratchet 121 is rotatable about an axis relative to the handle 110. The fixed ratchet 122 is connected to the handle 110 to be rotatable synchronously about an axis. The elastic member 150 is elastically connected between the adjusting member 140 and the fixed ratchet 122.

[0062] Figure 5This is a schematic cross-sectional view of the handle in the first embodiment of the torsion screwdriver of the present utility model. In this embodiment, a circumferential limiting protrusion 112 is provided on the inner circumferential surface of the handle 110, and a circumferential limiting groove 1222 is provided on the outer circumferential surface of the fixed ratchet wheel 122. When the fixed ratchet wheel 122 is installed in the installation cavity 111 of the handle 110, the circumferential limiting protrusion 112 of the handle 110 is inserted into the circumferential limiting groove 1222 of the fixed ratchet wheel 122, so that the fixed ratchet wheel 122 and the handle 110 can be relatively movable in the first direction X, and the fixed ratchet wheel 122 and the handle 110 are circumferentially limited. When the handle 110 rotates around the axis, the fixed ratchet wheel 122 rotates synchronously.

[0063] In this embodiment, the screwdriver bit 130 is arranged through the moving ratchet wheel 121 and the fixed ratchet wheel 122, and the adjusting member 140 is threadedly connected to the rear end of the screwdriver bit 130. A butting groove 1213 is provided on the end face of the moving ratchet wheel 121 facing away from the adjusting member 140, and a butting protrusion 131 capable of butting and cooperating with the butting groove 1213 is provided on the outer circumference of the screwdriver bit 130.

[0064] In this embodiment, a first groove 113 is provided on the front end face of the handle 110, and a second groove 114 is provided on the rear end face of the handle 110. Both the first groove 113 and the second groove 114 communicate with the installation cavity 111 and form a stepped structure with the installation cavity 111. The moving ratchet wheel 121 is arranged in the first groove 113 and can abut against the bottom of the first groove 113, and the adjusting member 140 is arranged in the second groove 114 and can abut against the bottom of the second groove 114.

[0065] Figure 6 This is a three-dimensional schematic diagram of the second embodiment of the torsion screwdriver of the present utility model. Some structures of the second embodiment are the same as those of the first embodiment. The following will describe the differences between the two, and the same parts will not be described in detail. In some embodiments, the adjusting member 140 moves in a direction close to or away from the ratchet assembly 120 by rotating around the axis. A pointer 141 is provided on the surface of the adjusting member 140 exposed outside the handle 110, and a scale line structure 115 is provided on the outer circumference of the end of the handle 110 corresponding to the adjusting member 140. In the second embodiment, the adjusting member 140 is exposed from the rear end of the handle 110, and a scale line structure 115 is provided on the rear end face of the handle 110, and the scale line structure 115 is located on the outer circumference of the adjusting member 140. When adjusting the adjusting member 140, by corresponding the pointer 141 to different scale lines of the scale line structure 115, the torsion screwdriver 100 is adjusted to different target torsion thresholds.

[0066] Figure 7 、 Figure 8 This is a three-dimensional schematic diagram of different perspectives of the third embodiment of the torsion screwdriver of the present utility model. Figure 9 、 Figure 10This is a three-dimensional exploded view and a cross-sectional view of the third embodiment of the torsion screwdriver of the present utility model. The torsion screwdriver 100 includes a handle 110, a ratchet assembly, a screwdriver bit 130, an adjusting member 140, and an elastic member 150. The handle 110 has an installation cavity 111 inside. At least part of the ratchet assembly is disposed in the installation cavity 111. The front end of the screwdriver bit 130 is used to cooperate with a fastener to be screwed, and the screwdriver bit 130 is connected to the ratchet assembly. The adjusting member 140 is partially located in the installation cavity 111 and partially exposed from one end of the handle 110. The elastic member 150 is elastically connected between the adjusting member 140 and the ratchet assembly. The adjusting member 140 can move in a direction close to or away from the ratchet assembly, so that the pressure exerted by the elastic member 150 on the ratchet assembly changes.

[0067] The ratchet assembly includes a fixed ratchet tooth structure 1221 and a moving ratchet 121. The screwdriver bit 130 is connected to the moving ratchet 121 so as to be able to rotate synchronously about an axis. The moving ratchet 121 includes a moving ratchet tooth structure 1211 that cooperates with the fixed ratchet tooth structure 1221. The adjusting member 140 can move in a direction close to or away from the ratchet assembly, so that the extrusion force between the fixed ratchet tooth structure 1221 and the moving ratchet tooth structure 1211 changes.

[0068] In the third embodiment, the ratchet assembly is located at the rear end of the handle 110, and the adjusting member 140 is exposed from the front end of the handle 110. Therefore, by adjusting the adjusting member 140 exposed from the front end of the handle 110, the preset torque threshold of the torsion screwdriver 100 can be adjusted.

[0069] In some embodiments, the surface of the adjusting member 140 exposed outside the handle 110 is provided with an adjusting protrusion. For example, the adjusting protrusion is a prismatic protrusion.

[0070] Figure 11 This is a half-sectional view of the handle in the third embodiment of the torsion screwdriver of the present utility model. In this embodiment, the rear end of the handle 110 is closed and has a plugging portion 116. The fixed ratchet tooth structure 1221 is integrally provided on the inner wall of the plugging portion 116 facing the installation cavity 111. The moving ratchet 121 is rotatable about an axis relative to the handle 110. The elastic member 150 is elastically connected between the adjusting member 140 and the moving ratchet 121.

[0071] In this embodiment, the adjusting member 140 is threadedly connected to the front end of the handle 110. The screwdriver bit 130 is disposed through the adjusting member 140 and the moving ratchet 121. The rear end of the screwdriver bit 130 abuts against the plugging portion 116. A limiting groove 1214 is provided on one side of the moving ratchet 121 facing the plugging portion 116. A limiting protrusion 132 is provided on the outer periphery of the screwdriver bit 130, and the limiting protrusion 132 is located in the limiting groove 1214.

[0072] Figure 12This is a three-dimensional schematic diagram of the fourth embodiment of the torsion screwdriver of the present utility model. Some structures of the fourth embodiment are the same as those of the third embodiment. The following will explain the differences between the two, and the same parts will not be elaborated. In some embodiments, the adjusting member 140 moves in a direction closer to or farther from the ratchet assembly by rotating around an axis. A pointer 141 is provided on the surface of the adjusting member 140 exposed outside the handle 110, and a scale line structure 115 is provided on the end of the handle 110 corresponding to the adjusting member 140 on the outer periphery of the adjusting member 140. In the fourth embodiment, the adjusting member 140 is exposed from the front end of the handle 110, and a scale line structure 115 is provided on the front end face of the handle 110, and the scale line structure 115 is located on the outer periphery of the adjusting member 140. When adjusting the adjusting member 140, by aligning the pointer 141 with different scale lines of the scale line structure 115, the torsion screwdriver 100 is adjusted to different target torque thresholds.

[0073] Figure 13 、 Figure 14 、 Figure 15 This is a three-dimensional schematic diagram, a three-dimensional exploded view, and a cross-sectional view of the fifth embodiment of the torsion screwdriver of the present utility model. In this embodiment, the torsion screwdriver 100 includes a handle 110, a moving ratchet 121, a screwdriver bit 130, and an elastic member 150. The handle 110 has an installation cavity 111 inside, and a sealing portion 116 is provided at the rear end of the handle 110.

[0074] Figure 16 This is a half-sectional view of the handle in the fifth embodiment of the torsion screwdriver of the present utility model. In this embodiment, a fixed ratchet tooth structure 1221 is provided on the inner wall of the sealing portion 116 facing the installation cavity 111. The moving ratchet 121 is connected in cooperation with the fixed ratchet tooth structure 1221. In this embodiment, the moving ratchet 121 includes a moving ratchet tooth structure 1211, and the moving ratchet 121 is connected in cooperation with the fixed ratchet tooth structure 1221 through the moving ratchet tooth structure 1211.

[0075] The screwdriver bit 130 is connected to the moving ratchet 121. Specifically, the screwdriver bit 130 is connected to the moving ratchet 121 so as to be able to rotate synchronously around an axis. The moving ratchet 121 is rotatable relative to the handle 110 around an axis. The elastic member 150 is elastically connected to the moving ratchet 121, and the elastic member 150 has an elastic restoring force that keeps the moving ratchet 121 engaged with the fixed ratchet tooth structure 1221.

[0076] In some embodiments, the torsion screwdriver 100 further includes an adjusting member 140. The adjusting member 140 is connected to the front end of the handle 110 and exposed from the front end of the handle 110, and the elastic member 150 is elastically connected between the adjusting member 140 and the moving ratchet 121. In this embodiment, the adjusting member 140 can move in a direction closer to or farther from the sealing portion 116, so that the pressure exerted by the elastic member 150 on the moving ratchet 121 changes.

[0077] In the torque screwdriver 100 of the above embodiment, it is elastically connected between the adjusting member 140 and the moving ratchet 121. The adjusting member 140 can move in a direction closer to or farther from the moving ratchet 121, so that the pressure of the elastic member 150 acting on the moving ratchet 121 changes, and the pressure between the moving ratchet 121 and the fixed ratchet tooth structure 1221 changes, thereby changing the preset torque threshold, making the torque screwdriver 100 more convenient for use in a variety of tightening scenarios. The adjusting member 140 is exposed from the front end of the handle 110. Therefore, only by adjusting the adjusting member 140 outside the handle 110 can the adjustment of the preset torque threshold be realized, and some components of the torque screwdriver 100 do not need to be disassembled to adjust the torque threshold, improving the convenience of adjusting the torque threshold.

[0078] In some embodiments, the adjusting member 140 is threadedly connected to the front end of the handle 110, and the rotation of the adjusting member 140 relative to the handle 110 around the axis makes the adjusting member 140 move closer to or farther from the blocking portion 116.

[0079] In some embodiments, the screwdriver bit 130 is disposed through the adjusting member 140 and the moving ratchet 121. The rear end of the screwdriver bit 130 abuts against the blocking portion 116. A limiting groove 1214 is provided on one side of the moving ratchet 121 facing the blocking portion 116, and a limiting protrusion 132 is provided on the outer periphery of the screwdriver bit 130. The limiting protrusion 132 is located in the limiting groove 1214.

[0080] According to the torque screwdriver 100 of the above embodiment, it includes a handle 110, a movable ratchet 121, a screwdriver head 130 and an elastic member 150. The rear end of the handle 110 has a blocking portion 116, and the blocking portion 116 is provided with a fixed ratchet tooth structure 1221 facing the inner wall of the installation cavity 111. The movable ratchet 121 is matched and connected with the fixed ratchet tooth structure 1221. The screwdriver head 130 is connected to the movable ratchet 121, and the elastic member 150 is elastically connected to the movable ratchet 121. When the fastener needs to be tightened, the front end of the screwdriver head 130 cooperates with the fastener to be tightened, and the handle 110 is rotated along the first direction. At this time, under the action of the elastic member 150, the movable ratchet 121 and the fixed ratchet tooth structure 1221 remain engaged, so that the handle 110 and the screwdriver head 130 are transmission connected, and the screwdriver head 130 is rotated along the first direction to tighten the fastener. When the fastener is tightened to reach a preset torque threshold, the elastic force of the elastic member 150 is insufficient to maintain the engagement between the movable ratchet 121 of the ratchet assembly and the fixed ratchet tooth structure 1221. At this time, the rotation of the handle 110 is no longer transmitted to the fastener. Although the handle 110 rotates, the fastener no longer continues to rotate, so that the fastener is tightened to the target torque, thereby achieving control over the tightening of the fastener to an appropriate degree and avoiding over-tightening or under-tightening. The structure of the torque screwdriver 100 is more streamlined. It only needs to connect the movable ratchet 121 and the screwdriver head 130 and install them in the installation cavity 111 of the handle 110, and then elastically connect the elastic member 150 and the movable ratchet 121 to achieve assembly. The assembly process is simpler, thereby making it easier to produce and assemble the torque screwdriver 100. At the same time, the structure of the torque screwdriver is more streamlined and the cost is lower.

[0081] Since the torque screwdriver 100 also includes an adjusting member 140, the elastic member 150 is elastically connected between the adjusting member 140 and the movable ratchet 121, and the adjusting member 140 can move in a direction close to or away from the movable ratchet 121, so that the pressure of the elastic member 150 acting on the movable ratchet 121 changes, so that the pressure of mutual squeezing between the movable ratchet 121 and the fixed ratchet tooth structure 1221 changes, thereby changing the preset torque threshold, making the torque screwdriver 100 more convenient to use in a variety of tightening scenarios. The adjusting member 140 is exposed from the front end of the handle 110, so the preset torque threshold can be adjusted by only adjusting the adjusting member 140 on the outside of the handle 110. The torque threshold does not need to be disassembled to adjust some components of the torque screwdriver 100, which improves the convenience of adjusting the torque threshold.

[0082] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A torque screwdriver, characterized in that: include: A handle having a mounting cavity therein; a ratchet assembly, at least partially disposed in the mounting cavity; A screwdriver head, the front end of which is used to cooperate with the fastener to be screwed, and the screwdriver head is connected to the ratchet assembly; An elastic member is elastically connected to the ratchet assembly, and the elastic member has an elastic restoring force that enables the ratchet assembly to remain in an engaged state.

2. The torque screwdriver according to claim 1, characterized in that: Also includes: The adjusting member is partially located in the mounting cavity and partially exposed from one end of the handle, and the elastic member is elastically connected between the adjusting member and the ratchet assembly. Wherein, the adjusting member can move towards or away from the ratchet assembly, so that the pressure of the elastic member acting on the ratchet assembly changes.

3. The torque screwdriver according to claim 2, characterized in that: The ratchet assembly includes a fixed ratchet tooth structure and a movable ratchet, the screwdriver head is connected to the movable ratchet so as to be able to rotate synchronously around an axis, the movable ratchet includes a movable ratchet tooth structure that cooperates with the fixed ratchet tooth structure, and the adjusting member can move in a direction close to or away from the ratchet assembly, so that the extrusion force between the fixed ratchet tooth structure and the movable ratchet tooth structure changes.

4. The torque screwdriver according to claim 3, characterized in that: The ratchet assembly is located at the front end of the handle, and the adjusting member is exposed from the rear end of the handle.

5. The torque screwdriver according to claim 4, characterized in that: The ratchet assembly includes a fixed ratchet, the fixed ratchet tooth structure is arranged on the fixed ratchet, the movable ratchet can rotate around the axis relative to the handle, the fixed ratchet is connected to the handle so as to be able to rotate around the axis synchronously, and the elastic member is elastically connected between the adjusting member and the fixed ratchet.

6. The torque screwdriver according to claim 5, characterized in that: The inner circumference of the handle is provided with a circumferential limiting protrusion, the outer circumference of the fixed ratchet is provided with a circumferential limiting groove, and the circumferential limiting protrusion of the handle is inserted into the circumferential limiting groove of the fixed ratchet, so that the fixed ratchet and the handle are limited in the circumferential direction.

7. The torque screwdriver according to claim 6, characterized in that: The screwdriver head is arranged through the movable ratchet and the fixed ratchet, the adjusting member is threadedly connected to the rear end of the screwdriver head, the end surface of the movable ratchet facing away from the adjusting member is provided with an abutment groove, and the outer periphery of the screwdriver head is provided with an abutment protrusion that can abut and cooperate with the abutment groove.

8. The torque screwdriver according to claim 7, characterized in that: The front end face of the handle is provided with a first groove, and the rear end face of the handle is provided with a second groove. The first groove and the second groove are both connected to the mounting cavity and form a stepped structure with the mounting cavity. The movable ratchet is arranged in the first groove and can abut against the bottom of the first groove. The adjusting member is arranged in the second groove and can abut against the bottom of the second groove.

9. The torque screwdriver according to claim 3, characterized in that: The ratchet assembly is located at the rear end of the handle, and the adjusting member is exposed from the front end of the handle.

10. The torque screwdriver according to claim 9, characterized in that: The rear end of the handle is closed and has a blocking portion, the fixed ratchet tooth structure is integrally arranged on the inner wall of the blocking portion facing the mounting cavity, the movable ratchet can rotate around the axis relative to the handle, and the elastic member is elastically connected between the adjusting member and the movable ratchet.

11. The torque screwdriver according to claim 10, characterized in that: The adjusting member is threadedly connected to the front end of the handle, the screwdriver head passes through the adjusting member and the movable ratchet, the rear end of the screwdriver head abuts against the blocking portion, a limiting groove is provided on the side of the movable ratchet facing the blocking portion, and a limiting protrusion is provided on the outer periphery of the screwdriver head, and the limiting protrusion is located in the limiting groove.

12. The torque screwdriver according to claim 2, characterized in that: The adjusting member moves toward or away from the ratchet assembly by rotating around the axis, a pointer is provided on the surface of the adjusting member exposed to the handle, and a scale line structure is provided on the outer periphery of the adjusting member at the end of the handle corresponding to the adjusting member.

13. A torque screwdriver, characterized in that: include: A handle is provided with an installation cavity inside the handle, a blocking portion is provided at the rear end of the handle, and a fixed ratchet tooth structure is provided on the inner wall of the blocking portion facing the installation cavity.

14. The torque screwdriver according to claim 13, characterized in that: Also includes: A movable ratchet, coupled and connected with the fixed ratchet tooth structure; A screwdriver head connected to the movable ratchet; An elastic member is elastically connected to the movable ratchet, and the elastic member has an elastic restoring force that enables the movable ratchet to maintain engagement with the fixed ratchet tooth structure.

15. The torque screwdriver according to claim 14, characterized in that: Also includes: The adjusting member is connected to the front end of the handle and exposed from the front end of the handle, and the elastic member is elastically connected between the adjusting member and the movable ratchet. The adjusting member can move toward or away from the blocking portion, so that the pressure of the elastic member acting on the movable ratchet wheel changes.

16. The torque screwdriver according to claim 15, characterized in that: The adjusting member is threadedly connected to the front end of the handle, and the adjusting member rotates around the axis relative to the handle so that the adjusting member moves closer to or away from the blocking portion.

17. The torque screwdriver according to claim 15, characterized in that: The screwdriver head passes through the adjusting member and the movable ratchet, the rear end of the screwdriver head abuts against the blocking portion, a limiting groove is provided on the side of the movable ratchet facing the blocking portion, a limiting protrusion is provided on the outer periphery of the screwdriver head, and the limiting protrusion is located in the limiting groove.

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