Wrench suitable for operation in cavity

Abstract

The invention discloses a wrench suitable for operation in a cavity, and relates to the field of tools, the wrench comprises a head part capable of being inserted into the cavity and a handle part for controlling the head part to rotate, one end of the handle part is connected to the outside of the head part, an assembling component is rotatably mounted in the head part through a bearing, and an inserting piece is detachably mounted at the bottom of the assembling component in an inserting manner; the assembling assembly comprises a sleeve piece and a disassembling button, the disassembling button is movably assembled above the sleeve piece, a right-handed rotation locking tooth opening and a left-handed rotation locking tooth opening are formed in the edge of the upper portion of the sleeve piece in the circumferential direction, and a rotation direction locking assembly capable of locking the rotation direction of the sleeve piece through the right-handed rotation locking tooth opening and the left-handed rotation locking tooth opening is installed on the handle part. An insertion type assembly structure is adopted on the whole, so that the insertion piece can be quickly mounted and dismounted, the rotation direction of the sleeve piece can be locked in advance by arranging the right-handed rotation locking tooth opening and the left-handed rotation locking tooth opening which are opposite in tooth direction on the sleeve piece of the wrench and cooperating with the selectable rotation direction locking assembly, and one-way rotation or complete locking is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tools, in particular to a wrench suitable for operation in a cavity. BACKGROUND

[0002] It is known that wrenches are commonly used tools with various styles, and for the tightening or loosening of bolts inside a cavity, a pipeline or other closed or semi-closed space, there are many difficulties due to the narrow operating space and obstructed view.

[0003] Traditional wrenches or socket tools are often large in size and cannot be directly inserted into the deep cavity, or even if they can enter, it is difficult to apply sufficient torque due to the limited range of handle movement. The bolts in the cavity are often located in irregular positions such as the side or bottom, and ordinary tools are prone to slipping during rotation, which not only reduces the work efficiency but also may damage the bolt corners or the cavity inner wall. To solve the problem of space entry, some improved solutions use extension rods or universal joint structures, but these extension components are prone to elastic deformation or clearance when transmitting torque, affecting the operation accuracy, especially in situations where the tightening torque needs to be strictly controlled. At the same time, when disassembling the bolts in the cavity, it is often necessary to adjust the rotation direction of the tool according to the thread rotation direction. Traditional tools lack a convenient one-way locking mechanism, and the operator needs to pay extra attention to the rotation direction. In the case of space limitations and difficulty in observation, it is easy to occur reverse miswinding, which may cause damage to the thread or tightening failure. In addition, when replacing different specifications of sockets or bits, the existing tools mostly use threaded connections or spring clips for fixation, and the replacement process often needs to use other tools or perform multiple alignment operations, which is extremely inconvenient and time-consuming. SUMMARY

[0004] (I) Invention purpose Therefore, the purpose of the present application is to provide a wrench suitable for operation in a cavity. The wrench adopts a plug-in assembly structure, allowing the plug-in to be quickly installed and removed, facilitating the replacement of corresponding output end heads according to different specifications of studs, improving the tool adaptability and operation convenience. The wrench has right-handed locking tooth openings and left-handed locking tooth openings with opposite tooth directions on the sleeve, cooperating with the selectable rotation direction locking assembly, which can pre-lock the rotation direction of the sleeve, achieving one-way rotation or complete locking, avoiding slipping or misoperation caused by reverse force in the cavity.

[0005] (II) Technical solutions To achieve the above-mentioned technical objectives, the present invention provides a wrench suitable for operation within a cavity, comprising a head that can be inserted into the cavity and a handle for controlling the rotation of the head. One end of the handle is connected to the outside of the head. An assembly assembly is rotatably mounted inside the head via a bearing. A plug is detachably fitted at the bottom of the assembly assembly. The assembly assembly includes a kit and a release button. The release button is movably mounted above the kit. When pressed, the release button can dislodge the plug. The upper edge of the kit is provided with right-hand locking teeth and left-hand locking teeth distributed circumferentially. A rotation locking assembly is mounted on the handle, capable of locking the rotation direction of the kit through the right-hand locking teeth and left-hand locking teeth.

[0006] As a further description of the above technical solution: the bottom of the assembly component is provided with an assembly socket, the plug-in includes an assembly pin and a torque output end, wherein the assembly pin is disposed at the top of the torque output end, the assembly pin can be inserted into the assembly socket, the side of the assembly pin is provided with a cavity, a movable locking pin is installed in the cavity, the locking pin is connected to the cavity by a push spring, the locking pin can be retracted into the cavity when compressed, the inner wall of the assembly socket is provided with a pin hole corresponding to the installation stop position of the locking pin, when the assembly pin is inserted into the assembly socket, the front end of the locking pin is inserted into the pin hole.

[0007] As a further description of the above technical solution: the outer end of the locking pin adopts a wedge-shaped structure, the top of the kit has an installation cavity, and a guide through hole is provided inside the installation cavity at the corresponding vertical position of the pin hole, and the guide through hole extends into the pin hole. A push rod is installed at the bottom of the disassembly button corresponding to the position of the guide through hole. The bottom of the push rod adopts a wedge-shaped surface that is adapted to the wedge-shaped structure of the outer end of the locking pin, so that when the disassembly button is pressed down, it can generate a squeezing force on the top of the locking pin. Under the cooperation of the wedge-shaped structure and the wedge-shaped surface, the locking pin is forced to retract into the cavity until it is completely retracted into the cavity. When the locking pin is completely retracted into the cavity, the assembly pin can be moved down and disengaged from the assembly socket, thereby realizing the disassembly of the plug.

[0008] As a further description of the above technical solution: a baffle is provided in the middle of the plug-in, and the assembly socket adopts a two-section variable cross-section structure with a top inner diameter smaller than the bottom inner diameter, so that when the assembly pin is inserted into the assembly socket, the assembly pin is inserted into the small diameter area at the top of the assembly socket, and the baffle is inserted into the large diameter area at the bottom of the assembly socket. This can increase the stability of the plug-in insertion and facilitate the observation of the insertion depth.

[0009] As a further description of the above technical solution: a return spring is installed at the bottom of the disassembly button. The return spring can provide an upward thrust to the disassembly button, so that the disassembly button will not exert pressure on the locking pin when it is not pressed, and the locking pin can be in the locked state. The bottom edge of the disassembly button is also provided with an L-shaped limiting clip. The inner wall of the mounting cavity is provided with a limiting groove along the axial direction. The bottom horizontal end of the limiting clip slides and engages in the limiting groove. The limiting clip can slide in the limiting groove and is limited by the limiting groove to prevent excessive bounce, thereby ensuring that the top of the disassembly button will not affect the operation inside the cavity. In addition, it should be noted that: a cover with a central opening is fixedly installed on the top of the head by bolts. The pressing control of the disassembly button can be realized through the opening cover.

[0010] As a further description of the above technical solution: the upper surface of the handle has two mounting holes, and each of the two mounting holes is equipped with a rotation locking component. The two rotation locking components correspond to the right-hand lock teeth and the left-hand lock teeth, respectively. The teeth of the right-hand lock teeth and the left-hand lock teeth are triangular structures with opposite directions. The rotation locking component includes a locking rod and a locking push spring. The locking push spring is connected to the end of the locking rod away from the head. The locking push spring can provide a pushing force to the locking rod, so that it has a tendency to move towards the head.

[0011] As a further description of the above technical solution: the inside of the handle is provided with a second assembly cavity for installing the locking rod along the length direction. The locking rod can slide along the length direction of the second assembly cavity in the second assembly cavity, thereby realizing the adjustability of the locking rod.

[0012] As a further description of the above technical solution: the locking rod adopts an L-shaped structure. The horizontal end of the locking rod extends into the head and is provided with a wedge-shaped head that matches the right-hand locking tooth and the left-hand locking tooth. The vertical end of the locking rod extends into the assembly port and is equipped with a lever. When it is necessary to control the locking rod from locking the kit, it is only necessary to pull the locking rod with the lever to make the wedge-shaped head at the front end of the locking rod retract from the corresponding right-hand locking tooth or left-hand locking tooth. The operation is convenient and quick.

[0013] As a further description of the above technical solution: the assembly port is further provided with a first assembly cavity, and a retraction component is installed inside the first assembly cavity. The retraction component can lock the dial plate when the dial plate retracts, thereby locking the locking rod. Therefore, after the dial plate is released, the locking rod will not be reinserted into the right-hand locking tooth or the left-hand locking tooth.

[0014] As a further description of the above technical solution: the retraction assembly includes a pressing member with an inverted U-shaped structure and at least one retraction pin installed below the front end of the pressing member. A spring is installed at the bottom of the pressing member, and a wedge-shaped structure is adopted above the retraction pin. A retraction slot is opened at the bottom of the dial plate corresponding to the position of the retraction pin. When the dial plate retracts to the position where the retraction slot coincides with the retraction pin, the retraction pin can be engaged in the retraction slot to lock the dial plate, thereby locking the locking rod. When it is necessary to unlock the locking rod, simply press the pressing member to move the retraction pin down and out of the retraction slot. At this time, the locking rod will pop out towards the head under the elastic force of the locking push spring and can be engaged in the corresponding right-hand locking tooth and left-hand locking tooth. The operation is convenient and quick.

[0015] In the above technical solution, the present invention provides a wrench suitable for operation within cavities. The wrench adopts a plug-in assembly structure, which allows for quick installation and removal of inserts. It facilitates the replacement of corresponding output ends according to different specifications of studs, improving tool adaptability and ease of operation. Furthermore, the wrench kit is equipped with right-hand locking teeth and left-hand locking teeth with opposite tooth directions. With the selectable rotation direction locking component, the rotation direction of the kit can be pre-locked to achieve unidirectional rotation or complete locking, avoiding slippage or misoperation caused by reverse force within the cavity. In addition, a return component is added to the wrench handle, which can fix the locking rod in the retracted position after adjustment, preventing it from automatically resetting due to spring force, ensuring a stable rotation direction locking state, and facilitating reliable setting in cavities with limited visibility. Finally, the insert can be easily removed by using a disassembly button and locking pin in a wedge-shaped engagement. At the same time, the limit clip and return spring ensure that the button does not protrude in the non-operational state, avoiding affecting the forward and backward movement and rotation within the cavity. It is especially suitable for assembly and maintenance operations in confined spaces such as deep cavities and narrow openings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of a wrench suitable for operation within a cavity, provided by the present invention; Figure 2 A bottom view of a wrench suitable for operation within a cavity, provided by the present invention; Figure 3 This invention provides a schematic diagram of the mounting structure of a wrench assembly suitable for operation within a cavity. Figure 4 This invention provides a schematic diagram of the assembly structure of a wrench suitable for operation within a cavity; Figure 5 This invention provides a schematic diagram of the structure of a wrench suitable for operation within a cavity, showing the assembly components and inserts when separated. Figure 1 ; Figure 6 This invention provides a schematic diagram of the structure of a wrench suitable for operation within a cavity, showing the assembly components and inserts when separated. Figure 2 ; Figure 7 A schematic diagram of a locking pin mounting structure for a wrench suitable for operation within a cavity, provided by the present invention; Figure 8 A schematic diagram of the structure of a locking lever in a wrench suitable for operation within a cavity, provided by the present invention, when locking the kit; Figure 9 A schematic diagram of the mounting structure of a wrench with a turning direction locking component suitable for operation within a cavity, provided by the present invention; Figure 10 A schematic diagram of a wrench retraction assembly structure suitable for operation within a cavity, provided by the present invention; Figure 11 This invention provides a schematic diagram of a wrench rotation direction locking assembly suitable for operation within a cavity.

[0018] Reference numerals: 1. Head; 10. Cover; 11. Assembly component; 110. Kit; 1100. Right-hand locking tooth; 1101. Left-hand locking tooth; 1102. Assembly socket; 1103. Mounting cavity; 1104. Guide hole; 1105. Limiting slot; 111. Removal button; 1110. Limiting clip; 1111. Push rod; 1112. Return spring; 12. Bearing; 2. Handle; 20. Assembly port; 2 1. First assembly cavity; 22. Second assembly cavity; 3. Insert; 30. Assembly insert; 300. Cavity; 31. Baffle; 32. Torque output end; 33. Locking pin; 330. Push spring; 4. Rotation locking assembly; 40. Dial plate; 400. Rebound latch; 41. Locking rod; 410. Wedge head; 42. Locking push spring; 5. Rebound assembly; 50. Pressing element; 51. Rebound spring; 52. Rebound pin. Detailed Implementation

[0019] The following description is exemplary in nature and is not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. The figures are merely schematic representations of the concept and principles of embodiments of this disclosure and do not necessarily show the specific dimensions and scale of the various embodiments of this disclosure. Certain details or structures of embodiments of this disclosure may be exaggerated in particular portions of certain figures.

[0020] like Figure 1 - Figure 11 As shown: This embodiment provides a technical solution: a wrench suitable for operation inside a cavity, including a head 1 that can be inserted into the cavity and a handle 2 that controls the rotation of the head 1. One end of the handle 2 is connected to the outside of the head 1. An assembly assembly 11 is rotatably installed inside the head 1 via a bearing 12. A plug 3 is detachably inserted and installed at the bottom of the assembly assembly 11. The assembly assembly 11 includes a kit 110 and a release button 111. The release button 111 is movably mounted on the top of the kit 110. When the release button 111 is pressed, the plug 3 can be dislodged. The upper edge of the kit 110 is provided with a right-hand locking tooth 1100 and a left-hand locking tooth 1101 distributed circumferentially. A rotation locking assembly 4 is installed on the handle 2, which can lock the rotation direction of the kit 110 through the right-hand locking tooth 1100 and the left-hand locking tooth 1101. Working principle: When using, first insert the corresponding plug 3 into the bottom of the assembly component 11, then operate the rotation direction as needed, and lock the component 4 on the handle 2 to the opposite rotation direction. At this time, the rotation locking component 4 can only rotate in the predetermined direction and is locked in the other direction. Then, insert the head 1 into the cavity so that the bottom of the plug 3 is inserted into the stud, and then rotate the handle 2. The operation is convenient and quick.

[0021] Specifically, such as Figure 5As shown, in order to achieve the installation and locking of the plug-in 3, in this embodiment, the bottom of the assembly assembly 11 is provided with an assembly socket 1102. The plug-in 3 includes an assembly pin 30 and a torque output end 32. The assembly pin 30 is disposed at the top of the torque output end 32 and can be inserted into the assembly socket 1102. A cavity 300 is provided on the side of the assembly pin 30, and a movable locking pin 33 is installed in the cavity 300. The locking pin 33 and the cavity 300 are connected. The locking pin 33 is connected by a push spring 330, which provides an outward push force to the locking pin 33. The locking pin 33 can retract into the cavity 300 when compressed. The inner wall of the assembly socket 1102 has a pin hole corresponding to the installation stop position of the locking pin 33. When the assembly pin 30 is inserted into the assembly socket 1102, the front end of the locking pin 33 is inserted into the pin hole. It should be noted that the installation stop position of the locking pin 33 is the position where the assembly pin 30 is fully inserted into the assembly socket 1102.

[0022] Specifically, such as Figure 5 - Figure 7 As shown, in order to disassemble the plug-in 3, in this embodiment, a wedge-shaped structure is adopted on the upper part of the outer end of the locking pin 33. The top of the kit 110 is provided with an installation cavity 1103. Inside the installation cavity 1103, a guide through hole 1104 is provided at the corresponding vertical position of the pin hole, and the guide through hole 1104 extends into the pin hole. The bottom of the disassembly button 111 is equipped with a push rod 1111 at the position corresponding to the guide through hole 1104. The bottom of the push rod 1111 adopts a wedge-shaped surface that is adapted to the wedge-shaped structure of the outer end of the locking pin 33, so that when the disassembly button 111 is pressed down, it can generate a squeezing force on the upper part of the locking pin 33. Under the cooperation of the wedge-shaped structure and the wedge-shaped surface, the locking pin 33 is forced to retract into the cavity 300 until it is completely retracted into the cavity 300. When the locking pin 33 is completely retracted into the cavity 300, the assembly pin 30 can be moved down and disengaged from the assembly socket 1102, thereby realizing the disassembly of the plug-in 3.

[0023] Specifically, such as Figure 5 - Figure 7 As shown, in order to facilitate the installation and disassembly of the plug-in 3, in this embodiment, a baffle 31 is provided in the middle of the plug-in 3. The assembly socket 1102 adopts a two-section variable cross-section structure with a top inner diameter smaller than the bottom inner diameter. When the assembly pin 30 is inserted into the assembly socket 1102, the assembly pin 30 is inserted into the small diameter area at the top of the assembly socket 1102, and the baffle 31 is inserted into the large diameter area at the bottom of the assembly socket 1102. This can increase the stability of the insertion of the plug-in 3 and facilitate the observation of the insertion depth. In addition, it should be noted that the cross-section of the assembly pin 30 is a non-circular structure, which can ensure that when it is inserted into the assembly socket 1102, the locking pin 33 can correspond to the pin hole, which is convenient for installation.

[0024] Specifically, such asFigure 5 - Figure 7 As shown, to facilitate the installation and removal of the plug-in 3 and to prevent the top of the removal button 111 from being too high and affecting the operation inside the cavity, in this embodiment, a return spring 1112 is installed at the bottom of the removal button 111. The return spring 1112 can provide an upward pushing force to the removal button 111, so that the removal button 111 will not exert pressure on the locking pin 33 when it is not pressed, and the locking pin 33 can be in the locked state. The bottom edge of the removal button 111 is also provided with a limit clip 1110 with an L-shaped structure. The inner wall of the mounting cavity 1103 A limiting slot 1105 is provided along the axial direction. The bottom horizontal end of the limiting piece 1110 slides and engages in the limiting slot 1105. Based on this, the limiting piece 1110 can slide in the limiting slot 1105 and will not bounce excessively due to the limitation of the limiting slot 1105, thereby ensuring that the top of the disassembly button 111 will not affect the operation inside the cavity. In addition, it should be noted that a cover 10 with a central opening is fixedly installed on the top of the head 1 by bolts. The pressing control of the disassembly button 111 can be realized through the opening cover 10.

[0025] Specifically, such as Figure 8 - Figure 11As shown, in order to control and limit the rotation direction of the assembly component 11, in this embodiment, two assembly ports 20 are opened on the upper surface of the handle 2. Each assembly port 20 is equipped with a rotation direction locking component 4. The two rotation direction locking components 4 correspond to the right-hand locking tooth 1100 and the left-hand locking tooth 1101, respectively. The tooth structure of the right-hand locking tooth 1100 and the left-hand locking tooth 1101 is a triangular structure with opposite directions. The rotation direction locking component 4 includes a locking rod 41 and a locking push spring 42. The locking push spring 42 is connected to the end of the locking rod 41 away from the head 1. The locking push spring 42 can provide a pushing force to the locking rod 41, causing it to have a tendency to move towards the head 1. Based on this, when one end of one of the locking rods 41 is engaged with the right-hand locking tooth 1100, due to the structural characteristics of the right-hand locking tooth 1100, the assembly 110... The right-hand rotation direction is locked, meaning that when the assembly 110 rotates to the right, it is engaged by the locking rod 41 and cannot rotate to the right. When rotating to the left, the front end of the locking rod 41 is compressed, which is transmitted to the locking push spring 42, causing it to retract. Therefore, the left-hand rotation is unaffected. Conversely, when one end of the other locking rod 41 is engaged in the left-hand locking tooth 1101, the left-hand rotation direction of the assembly 110 is locked. That is, when the assembly 110 rotates to the left, it is engaged by the locking rod 41 and cannot rotate to the left. When rotating to the right, the front end of the locking rod 41 is compressed, which is transmitted to the locking push spring 42, causing it to retract. Therefore, the right-hand rotation is unaffected. When both locking rods 41 are engaged in the corresponding right-hand locking tooth 1100 and left-hand locking tooth 1101, the assembly 110 is locked in both the left-hand and right-hand rotation directions and cannot rotate. This achieves the control and limitation of the rotation direction of the assembly assembly 11.

[0026] Specifically, such as Figure 8 - Figure 11 As shown, in order to achieve adjustable control of the locking rod 41, in this embodiment, the handle 2 has a second assembly cavity 22 for mounting the locking rod 41 along the length direction. The locking rod 41 can slide in the second assembly cavity 22 along the length direction of the second assembly cavity 22, thereby achieving adjustable locking rod 41.

[0027] Specifically, such as Figure 8 - Figure 11As shown, in order to facilitate the movement of the locking rod 41 from the outside, in this embodiment, the locking rod 41 adopts an L-shaped structure. The front end of the horizontal end of the locking rod 41 extends into the head 1 and is provided with a wedge-shaped head 410 that is adapted to the right-hand locking tooth 1100 and the left-hand locking tooth 1101. The vertical end of the locking rod 41 extends into the assembly port 20 and is equipped with a lever 40. Based on this, when it is necessary to control the locking rod 41 not to lock the kit 110, it is only necessary to pull the locking rod 41 by the lever 40 to make the wedge-shaped head 410 at the front end of the locking rod 41 retract from the corresponding right-hand locking tooth 1100 or left-hand locking tooth 1101. The operation is convenient and quick.

[0028] Specifically, such as Figure 8 - Figure 11 As shown, since the locking push spring 42 always provides a pushing force to the locking rod 41 in the direction of the head 1, so that it is normally inserted into the right-hand locking tooth 1100 or the left-hand locking tooth 1101, the locking rod 41 will re-insert into the locking state after the release of the lever 40. In order to limit the natural rebound of the locking rod 41, in this embodiment, the assembly port 20 is also provided with a first assembly cavity 21. The first assembly cavity 21 is equipped with a backing component 5. The backing component 5 can lock the lever 40 when the lever 40 retracts, thereby locking the locking rod 41. Therefore, after the release of the lever 40, the locking rod 41 will not re-insert into the right-hand locking tooth 1100 or the left-hand locking tooth 1101.

[0029] Specifically, such as Figure 8 - Figure 11 As shown, to facilitate locking and unlocking operations of the locking rod 41, in this embodiment, the retraction assembly 5 includes a pressing member 50 with an inverted U-shaped structure and at least one retraction pin 52 installed below the front end of the pressing member 50. A spring 51 is installed at the bottom of the pressing member 50, and a wedge-shaped structure is adopted above the retraction pin 52. A retraction slot 400 is opened at the bottom of the lever 40 corresponding to the position of the retraction pin 52. When the lever 40 retracts to the position where the retraction slot 400 and the retraction pin 52 are in contact, the lever 40 will retract to the position where the retraction slot 400 and the retraction pin 52 are in contact. When the lock is engaged, the snap-back pin 52 can be engaged in the snap-back slot 400 and the deflector plate 40 is locked, thus locking the locking rod 41. When it is necessary to unlock the locking rod 41, simply press the pressing part 50 to move the snap-back pin 52 down and out of the snap-back slot 400. At this time, the locking rod 41 will pop out towards the head 1 under the elastic force of the locking push spring 42, and can be engaged in the corresponding right-hand locking tooth slot 1100 and left-hand locking tooth slot 1101. The operation is convenient and quick.

[0030] The exemplary implementation of the solution proposed in this disclosure has been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.

Claims

1. A wrench suitable for use in a cavity, comprising a head (1) capable of being inserted inside the cavity and a handle (2) for controlling the rotation of the head (1), one end of the handle (2) being connected to the outside of the head (1), characterized in that, The inside of the head (1) is rotatably mounted with an assembly component (11) through a bearing (12), the bottom of the assembly component (11) is detachably inserted with an insert (3), the assembly component (11) comprises a sleeve (110) and a disassembly button (111), the disassembly button (111) is movably assembled above the sleeve (110), the disassembly button (111) can make the insert (3) fall off when pressed, the upper edge of the sleeve (110) is provided with a right-handed locking tooth port (1100) and a left-handed locking tooth port (1101) in circumferential direction, the handle (2) is provided with a rotational locking assembly (4) capable of locking the rotation direction of the sleeve (110) through the right-handed locking tooth port (1100) and the left-handed locking tooth port (1101).

2. A wrench suitable for in-cavity operation according to claim 1, wherein, The bottom of the assembly component (11) is provided with an assembly socket (1102), the insert (3) comprises an assembly plug (30) and a torque output end (32), wherein the assembly plug (30) is arranged on the top of the torque output end (32), the assembly plug (30) can be inserted into the assembly socket (1102), the side of the assembly plug (30) is provided with a cavity (300), a lock pin (33) capable of moving is arranged in the cavity (300), the lock pin (33) and the cavity (300) are connected through a push spring (330), the lock pin (33) can be retracted into the cavity (300) when being extruded, the inner wall of the assembly socket (1102) is provided with a pin hole corresponding to the installation stop position of the lock pin (33), when the assembly plug (30) is inserted into the assembly socket (1102), the front end of the lock pin (33) is inserted into the pin hole.

3. A wrench suitable for in-cavity operation according to claim 2, wherein, The outer end of the lock pin (33) is provided with a wedge structure, the top of the sleeve (110) is provided with a mounting cavity (1103), a guide through hole (1104) is arranged in the mounting cavity (1103) at a corresponding vertical position of the pin hole, and the guide through hole (1104) extends into the pin hole, the bottom of the disassembly button (111) is provided with a push rod (1111) corresponding to the position of the guide through hole (1104), the bottom of the push rod (1111) is provided with a wedge surface matched with the wedge structure of the outer end of the lock pin (33), so that the disassembly button (111) can extrude the upper part of the lock pin (33) when being pressed down, and the lock pin (33) is forced to retract into the cavity (300) under the cooperation of the wedge structure and the wedge surface.

4. A spanner suitable for use in a cavity according to claim 3, wherein, The middle part of the insert (3) is provided with a baffle (31), and the assembly socket (1102) is provided with a two-section variable cross-section structure with a top inner diameter smaller than a bottom inner diameter.

5. A wrench suitable for in-cavity operation according to claim 1, wherein, The bottom of the disassembly button (111) is provided with a reset spring (1112), which can provide an upward thrust to the disassembly button (111), so that the disassembly button (111) does not generate pressure on the locking pin (33) when it is not pressed, and the locking pin (33) can be in a locked state. The bottom edge of the disassembly button (111) is also provided with a limiting clamping piece (1110) in an L-shaped structure, and the inner wall of the mounting cavity (1103) is provided with a limiting clamping groove (1105) in the axial direction. The bottom horizontal end of the limiting clamping piece (1110) is slidingly clamped in the limiting clamping groove (1105).

6. A wrench suitable for in-cavity operation according to claim 1, wherein, The upper surface of the handle (2) is provided with two assembly openings (20), and each of the two assembly openings (20) is provided with a rotation locking assembly (4). The two rotation locking assemblies (4) correspond to the right-handed locking tooth opening (1100) and the left-handed locking tooth opening (1101) respectively. The tooth opening structures of the right-handed locking tooth opening (1100) and the left-handed locking tooth opening (1101) are triangular structures with opposite directions. The rotation locking assembly (4) includes a locking insertion rod (41) and a locking push spring (42). The locking push spring (42) is connected to one end of the locking insertion rod (41) away from the head (1). The locking push spring (42) can provide a thrust to the locking insertion rod (41), so that it has a movement tendency towards the head (1).

7. A spanner suitable for use in a cavity according to claim 6, wherein, The inside of the handle (2) is provided with a second assembly cavity (22) for mounting the locking insertion rod (41) along the length direction. The locking insertion rod (41) can slide in the second assembly cavity (22) along the length direction of the second assembly cavity (22).

8. A wrench suitable for in-cavity operation according to claim 7, wherein, The locking insertion rod (41) adopts an L-shaped structure. The horizontal end of the locking insertion rod (41) extends to the head (1) and is provided with a wedge-shaped head (410) adapted to the right-handed locking tooth opening (1100) and the left-handed locking tooth opening (1101). The vertical end of the locking insertion rod (41) extends to the assembly opening (20) and is provided with a dial plate (40).

9. A wrench suitable for in-cavity operation according to claim 8, wherein, The inside of the assembly opening (20) is also provided with a first assembly cavity (21). The first assembly cavity (21) is provided with a return assembly (5). The return assembly (5) can lock the dial plate (40) when it is returned.

10. A wrench suitable for in-cavity operation according to claim 9, wherein, The return assembly (5) includes a pressing piece (50) in an inverted U-shaped structure and at least one return clamping pin (52) mounted below the front end of the pressing piece (50). The bottom of the pressing piece (50) is provided with a rebound spring (51). The upper part of the return clamping pin (52) adopts a wedge-shaped structure. The bottom of the dial plate (40) is provided with a return clamping hole (400) corresponding to the position of the return clamping pin (52). When the dial plate (40) is returned to the position where the return clamping hole (400) coincides with the return clamping pin (52), the return clamping pin (52) can be clamped into the return clamping hole (400).

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