Hollow ratchet wrench tool

Abstract

The utility model provides a hollow ratchet wrench tool, which belongs to the technical field of wrenches and comprises a mounting shell, a clamping unit and a reversing unit. A ratchet wheel used for being connected with the adjusting sleeve is arranged in the installation shell. The clamping unit comprises two groups of telescopic clamping blocks which are symmetrically distributed on two radial sides of the ratchet wheel; one end of the telescopic clamping block is hinged to the mounting shell, and the other end of the telescopic clamping block extends to the outer edge of the ratchet wheel; the opposite sides of the two sets of telescopic clamping blocks are each provided with a set of first elastic pieces, and the first elastic pieces are connected with the inner wall of the mounting shell. The reversing unit comprises a cam block located between the two sets of telescopic clamping blocks and a shifting piece with one end fixed to the cam block and the other end screwed out of the installation shell in the axial direction of the ratchet wheel. The cam block is provided with three abutting planes which are sequentially arranged in a triangular mode, and an abutting arc face is arranged between every two adjacent abutting planes. According to the hollow ratchet wrench tool, the service life can be prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wrenches, and more specifically relates to a hollow ratchet wrench assembly. Background Art

[0002] A ratchet wrench is a manual screw tightening and loosening tool used for tightening and loosening screws. It is widely used due to its high adaptability, ease of use, and low cost. A ratchet wrench typically includes a housing within which are located a ratchet, a latch unit, and a reversing unit.

[0003] In the prior art, one of the latch blocks of the latch unit is engaged with the ratchet, and the reversing unit includes a cam block for switching between different latch blocks. The latch block and the cam block are prone to wear after long-term use, and severely worn latch blocks and cam blocks will affect the normal operation of the wrench. Therefore, they need to be replaced and repaired in time. As a result, the service life of the wrench is short and the maintenance cost is high. Utility Model Content

[0004] The purpose of the utility model is to provide a hollow ratchet wrench manual assembly, aiming to solve the problems that the clamping block and cam block structures of the existing ratchet wrench are easy to wear, and frequent replacement and maintenance reduce the service life of the ratchet wrench and increase the maintenance cost.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is to provide a hollow ratchet wrench manual assembly, comprising:

[0006] An installation housing is provided with an accommodating cavity inside, a ratchet is provided in the accommodating cavity, and an end face of one side of the ratchet extends out of the installation housing for connection with the adjusting sleeve;

[0007] The locking unit comprises two sets of telescopic locking blocks symmetrically distributed on both radial sides of the ratchet; one end of each telescopic locking block is hinged to the mounting housing, and the other end of each telescopic locking block extends to the outer edge of the ratchet for engaging with the ratchet; a set of first elastic members is provided on opposite sides of each set of telescopic locking blocks, and the first elastic members are connected to the inner wall of the mounting housing; and

[0008] The reversing unit includes a cam block located between the two sets of telescopic locking blocks, and a toggle member having one end fixed to the cam block and the other end rotated out of the mounting housing along the axial direction of the ratchet wheel; the cam block has three abutment planes arranged in sequence in a triangular shape, and an abutment arc surface is provided between each two adjacent abutment planes;

[0009] When one of the telescopic card blocks is engaged with the ratchet, the telescopic card block abuts against one of the abutting planes, and the abutting arc surface opposite to the abutting plane abuts against the other group of telescopic card blocks.

[0010] In a possible implementation, the mounting housing includes:

[0011] The bottom shell has the accommodating cavity provided therein, and a mounting groove communicating with the accommodating cavity provided on the top of the bottom shell; an inwardly recessed limiting groove is provided on the outer side of the bottom shell away from the card engine unit;

[0012] a cover plate, which is arranged in the mounting groove and is detachably connected to the bottom shell;

[0013] Wherein, one side of the ratchet passes through the bottom of the bottom shell; one end of the toggle member passes through the bottom of the bottom shell and is placed in the limiting groove.

[0014] In some embodiments, the cover plate and the bottom shell are connected via a plurality of threaded connectors.

[0015] In some embodiments, a plurality of first magnets are spaced apart on the outer peripheral surface of the cover plate facing the mounting groove wall, a plurality of second magnets corresponding one-to-one to the plurality of first magnets are provided on the bottom shell, and the first magnets and the second magnets are magnetically connected.

[0016] Exemplarily, the cover plate has an outer peripheral surface facing the mounting groove wall, which is inwardly recessed with a relief hole and a first sliding groove connected in sequence, and the first sliding groove extends outward along the axial direction of the ratchet, and the first magnet is slidably arranged in the first sliding groove;

[0017] Each of the first magnets corresponds to a set of first adjusting bolts, one end of the first adjusting bolt is screwed into the cover plate, extends into the first sliding groove, and is fixedly connected to the first magnet;

[0018] The second magnet is provided on the bottom shell at the joint with the clearance hole;

[0019] Wherein, after the cover plate is installed in the installation groove, the first adjusting bolt drives the first magnet to slide to the clearance hole, so that the first magnet is magnetically connected to the second magnet.

[0020] In some embodiments, the bottom shell is provided with a second slide groove corresponding one-to-one to the clearance hole, the second slide groove extends in a direction perpendicular to the first slide groove, the second magnet is provided in the second slide groove; a second elastic member is provided between the second magnet and the bottom of the second slide groove;

[0021] Wherein, after the cover plate is installed in the installation groove, the first magnet absorbs the second magnet and causes the second magnet to slide into the clearance hole, and the second elastic member is in a stretched state.

[0022] In a possible implementation, the toggle member includes:

[0023] a connecting post, one end of which is fixed to the cam block and the other end of which passes through the mounting housing along the axial direction of the ratchet wheel;

[0024] The dial handle is arranged outside the mounting shell and is fixed to the protruding end of the connecting column.

[0025] In a possible implementation, the telescopic card engine block includes:

[0026] a connecting block hinged to the inner wall of the mounting housing;

[0027] a telescopic block, one end of which is slidably connected to the connecting block and the other end of which extends toward the ratchet; the extended end of the telescopic block is engaged with the ratchet;

[0028] Wherein, after the telescopic block and the connecting block slide to a preset position along the tangential direction of the engagement point between the telescopic locking block and the ratchet wheel, a limiting member is provided between the connecting block and the telescopic block.

[0029] In some embodiments, the telescopic block is provided with a plurality of limiting holes, which are spaced apart along the sliding direction of the telescopic block; wherein one end of the limiting member passes through the connecting block and is screwed into one of the limiting holes.

[0030] Exemplarily, a connecting groove is provided at one end of the connecting block away from the hinged end, and a sliding portion adapted to the connecting groove is provided on the telescopic block; wherein a plurality of the limiting holes are spaced apart and arranged on the sliding portion.

[0031] Compared with the prior art, the solution shown in the embodiment of the present application is provided with three abutment planes, and a group of abutment arc surfaces is provided at the junction of every two abutment planes. Therefore, the structure of the traditional single abutment arc surface can be replaced, that is, by providing three groups of abutment planes and abutment arc surfaces, the friction loss can be distributed on multiple abutment arc surfaces and abutment planes, thereby improving the service life of the cam block; after the telescopic card block and the ratchet are engaged and used for a period of time, the telescopic card block can be extended outward by a certain distance to compensate for the length of the worn part and ensure the engagement between the telescopic card block and the ratchet; therefore, the manual assembly of the hollow ratchet wrench provided in the present application can extend the service life and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic structural diagram of a hand-assembled hollow ratchet wrench provided by an embodiment of the present utility model;

[0034] Figure 2 A schematic diagram of the bottom structure of the bottom shell provided in an embodiment of the present utility model;

[0035] Figure 3 A schematic diagram of the vertical cross-sectional structure of the hand-assembled hollow ratchet wrench provided by an embodiment of the present utility model;

[0036] Figure 4 A schematic diagram of the transverse cross-sectional structure of a hand-assembled hollow ratchet wrench provided by an embodiment of the present utility model;

[0037] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0038] Figure 6 This is a schematic cross-sectional structure diagram of the telescopic card block used in an embodiment of the present utility model.

[0039] In the picture:

[0040] 1. Mounting shell; 11. Accommodating cavity; 12. Ratchet; 13. Bottom shell; 131. Second slide groove; 132. Limiting groove; 14. Cover plate; 141. Clearance hole; 142. First slide groove; 15. Mounting groove; 16. First magnet; 17. Second magnet; 18. First adjusting bolt; 19. Second elastic member; 2. Clamp unit; 21. Telescopic clamp block; 211. Connecting block; 212. Telescopic block; 213. Limiting member; 214. Limiting hole; 215. Sliding portion; 216. Connecting groove; 22. First elastic member; 3. Reversing unit; 31. Cam block; 311. Abutting plane; 312. Abutting arc surface; 32. Driving member; 321. Connecting column; 322. Driving hand DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms “length”, “width”, “upper”, “lower”, “front”, “back”, “top”, “bottom”, “inside”, “outside”, etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "several" means two or more, unless otherwise specifically defined.

[0044] Please also refer to Figures 1 to 6 The hollow ratchet wrench manual assembly provided by the present invention is now described. The hollow ratchet wrench manual assembly includes a mounting shell 1, a latch unit 2 and a reversing unit 3; a housing 11 is provided inside the mounting shell 1, a ratchet 12 is provided in the housing 11, and one side of the axial end face of the ratchet 12 passes through the mounting shell 1 for connection with the adjusting sleeve; the latch unit 2 includes two groups of telescopic latch blocks 21 symmetrically distributed on both sides of the radial direction of the ratchet 12; one end of the telescopic latch block 21 is hinged to the mounting shell 1, and the other end of the telescopic latch block 21 extends to the outer edge of the ratchet 12 for engagement with the ratchet 12; a group of first elastic members 22 are provided on the opposite sides of the two groups of telescopic latch blocks 21, and the first elastic members 22 are connected to the mounting shell 1. The reversing unit 3 includes a cam block 31 located between the two groups of telescopic card blocks 21, and a toggle member 32, one end of which is fixed to the cam block 31 and the other end of which is axially rotated out of the mounting housing 1 along the ratchet 12; the cam block 31 has three abutment planes 311 arranged in sequence in a triangular shape, and an abutment arc surface 312 is provided between each two adjacent abutment planes 311; wherein, when one of the telescopic card blocks 21 is engaged with the ratchet 12, the telescopic card block 21 abuts against one of the abutment planes 311, and the abutment arc surface 312 opposite to the abutment plane 311 abuts against the other group of telescopic card blocks 21.

[0045] It should be understood that the present application is provided with three sets of abutting planes 311 and three sets of abutting arc surfaces 312, and the three sets of abutting planes 311 are sequentially connected to form a triangular structure, with the aforementioned abutting arc surfaces 312 provided at the angles of the triangles for transition. Therefore, at the angles opposite each abutting plane 311, there is a corresponding abutting arc surface 312. When one of the telescopic locking blocks 21 abuts against the abutting planes 311, the abutting arc surface 312 opposite to the abutting plane 311 will abut against another set of telescopic locking blocks 21. Therefore, when the present application is provided with three sets of abutting planes 311 and three sets of abutting arc surfaces 312, the contact force at the abutting points can be distributed, thereby reducing wear and tear of each part and avoiding damage caused by stress concentration, thereby extending the service life of the hollow ratchet wrench assembly.

[0046] It should be noted that since the ratchet 12 can only engage with one telescopic card block 21 at a time, the telescopic card block 21 abutting the abutting plane 311 can engage with the ratchet 12, and the telescopic card block 21 abutting the abutting arc surface 312 is away from the outer edge of the ratchet 12; that is, by switching the two telescopic card blocks 21, the rotation direction of the ratchet 12 can be changed.

[0047] Compared with the prior art, the hollow ratchet wrench manual assembly provided by the present invention is provided with three abutment planes 311, and a group of abutment arc surfaces 312 are provided at the junction of every two abutment planes 311. Therefore, the structure of the traditional single abutment arc surface 312 can be replaced, that is, by providing three groups of abutment planes 311 and abutment arc surfaces 312, the friction loss can be distributed on multiple abutment arc surfaces 312 and abutment planes 311, thereby improving the service life of the cam block 31; after the telescopic card block 21 and the ratchet 12 are engaged and used for a period of time, the telescopic card block 21 can be extended outward by a certain distance to compensate for the length of the worn part and ensure the engagement between the telescopic card block 21 and the ratchet 12; therefore, the hollow ratchet wrench manual assembly provided in the present application can extend the service life and reduce maintenance costs.

[0048] See also Figures 1 to 2 In some possible embodiments, the mounting shell 1 includes a bottom shell 13 and a cover plate 14; a receiving cavity 11 is provided inside the bottom shell 13, and a mounting groove 15 connected to the receiving cavity 11 is provided on the top of the bottom shell 13; an inwardly recessed limiting groove 132 is provided on the outer side of the bottom shell 13 away from the engine unit 2; the cover plate 14 is covered in the mounting groove 15 and is detachably connected to the bottom shell 13; wherein, one side of the ratchet 12 passes through the bottom of the bottom shell 13; one end of the toggle member 32 passes through the bottom of the bottom shell 13 and is placed in the limiting groove 132.

[0049] By providing a receiving cavity 11 and an installation groove 15 in the bottom shell 13, the ratchet 12 and the cover plate 14 can be easily installed. By detachably connecting the cover plate 14 to the bottom shell 13, the cover plate 14 can be opened in time to observe the usage of each component in the receiving cavity 11 and facilitate subsequent repair and maintenance.

[0050] By setting the limiting groove 132, it is convenient to extend the lever hand 322 of the toggle member 32 and limit it in the corresponding limiting groove 132; optionally, the limiting groove 132 is a fan-shaped structure, and when the lever hand 322 abuts against the two side edges of the fan, two different telescopic card blocks 21 are respectively engaged with the ratchet 12.

[0051] Optionally, the limiting groove 132 is circular. In this case, the shifting hand 322 has multiple positions, which can be used to achieve multiple abutment states of the cam block 31.

[0052] As a specific connection method between the cover plate 14 and the bottom shell 13, the cover plate 14 and the bottom shell 13 are connected by a plurality of threaded connectors.

[0053] The cover plate 14 is connected to the bottom shell 13 by a threaded connector, which makes it easy to disassemble and maintain the cover plate 14.

[0054] See also Figure 4 and Figure 5 As another specific connection method between the cover plate 14 and the bottom shell 13, a plurality of first magnets 16 are arranged at intervals on the outer peripheral surface of the cover plate 14 facing the wall of the mounting groove 15, and a plurality of second magnets 17 corresponding one-to-one to the plurality of first magnets 16 are provided on the bottom shell 13. The first magnets 16 and the second magnets 17 are magnetically connected.

[0055] The first magnet 16 and the second magnet 17 are magnetically connected, so that the cover plate 14 can be easily disassembled, and the operation is simpler.

[0056] See also Figure 5 , exemplarily, the cover plate 14 has an inwardly recessed outer peripheral surface of the groove wall facing the mounting groove 15, with a sequentially connected clearance hole 141 and a first slide groove 142, and the first slide groove 142 extends axially outward along the ratchet 12, and a first magnet 16 is slidably arranged in the first slide groove 142; each first magnet 16 corresponds to a group of first adjusting bolts 18, one end of the first adjusting bolt 18 is screwed into the cover plate 14, and extends into the first slide groove 142, and is fixedly connected to the first magnet 16; a second magnet 17 is provided on the bottom shell 13 at the interface with the clearance hole 141; wherein, after the cover plate 14 is covered in the mounting groove 15, the first adjusting bolt 18 drives the first magnet 16 to slide to the clearance hole 141, so that the first magnet 16 is magnetically connected to the second magnet 17.

[0057] By providing a clearance hole 141, when the first magnet 16 slides to the clearance hole 141, a magnetic connection between the first magnet 16 and the second magnet 17 is achieved; by providing a first sliding groove 142, the first adjusting bolt 18 drives the first magnet 16 to slide in the first sliding groove 142, so that the first magnet 16 moves away from or close to the second magnet 17.

[0058] The above-mentioned connection method set in the present application does not require the first adjusting bolt 18 to be completely removed. It is only necessary to make the first adjusting bolt 18 drive the first magnet 16 away from the clearance hole 141. Then, there is no magnetic force between the first magnet 16 and the second magnet 17. At this time, the cover 14 can be easily removed; therefore, the problem of loss and damage of the first adjusting bolt 18 after removal can be avoided.

[0059] It should be understood that when the first adjusting bolt 18 drives the first magnet 16 away from the clearance hole 141, the magnetic force between the first magnet 16 and the second magnet 17 disappears, and the cover 14 can be easily removed; when the first adjusting bolt 18 drives the first magnet 16 to slide to the clearance hole 141, the first magnet 16 and the second magnet 17 are magnetically connected, thereby realizing the connection between the cover 14 and the bottom shell 13.

[0060] See also Figure 5 In some embodiments, a second slide groove 131 corresponding to the clearance hole 141 is provided on the bottom shell 13, and the second slide groove 131 extends in a direction perpendicular to the first slide groove 142. A second magnet 17 is provided in the second slide groove 131; a second elastic member 19 is provided between the second magnet 17 and the bottom of the second slide groove 131; wherein, after the cover plate 14 is covered in the installation groove 15, the first magnet 16 absorbs the second magnet 17 and causes the second magnet 17 to slide into the clearance hole 141, and the second elastic member 19 is in a stretched state.

[0061] The second elastic member 19 is provided so that after the first magnet 16 moves away from the second magnet 17 , the second magnet 17 is reset into the bottom shell 13 , thereby facilitating the removal of the cover 14 .

[0062] When the first adjusting bolt 18 drives the first magnet 16 to slide to the clearance hole 141, the first magnet 16 is magnetically connected to the second magnet 17. At this time, the second magnet 17 is attracted to the first magnet 16 under the action of magnetic force and is locked at the connection between the cover plate 14 and the bottom shell 13, which can prevent the cover plate 14 from separating from the bottom shell 13; when the first adjusting bolt 18 drives the first magnet 16 away from the clearance hole 141, the magnetic force between the first magnet 16 and the second magnet 17 disappears, and the second magnet 17 is reset to the bottom shell 13 under the action of the second elastic member 19, which can be easily removed.

[0063] See also Figure 3In some possible embodiments, the toggle member 32 includes a connecting column 321 and a toggle hand 322; one end of the connecting column 321 is fixed to the cam block 31, and the other end passes through the mounting shell 1 axially along the ratchet 12; the toggle hand 322 is arranged outside the mounting shell 1 and is fixed to the protruding end of the connecting column 321.

[0064] By moving the lever 322 in the limiting slot 132 , the connecting column 321 drives the cam block 31 to rotate, thereby switching the ratchet 12 to engage with the other set of telescopic locking blocks 21 .

[0065] Optionally, as a specific embodiment of the above-mentioned telescopic card block 21, the telescopic card block 21 may include a meshing portion and a hinged portion, the hinged portion is connected to the mounting shell 1, the meshing portion and the ratchet 12 are internally engaged with each other, and the meshing portion and the hinged portion are connected by a screw. When the screw is rotated, the meshing portion and the hinged portion move closer to or away from each other to achieve the telescopic card portion.

[0066] Exemplarily, the above-mentioned screw is provided on the side of the meshing portion away from the ratchet 12, and a rotating nut threadedly connected to the above-mentioned screw is provided on the hinged portion. When the screw is rotated, the meshing portion moves away from or approaches the hinged portion; at this time, in order to ensure the meshing of the meshing portion and the ratchet 12, the number of rotations of the screw is an integer.

[0067] See also Figure 6 As another specific embodiment of the above-mentioned telescopic card block 21, the telescopic card block 21 includes a connecting block 211 and a telescopic block 212; the connecting block 211 is hinged to the inner wall of the mounting shell 1; one end of the telescopic block 212 is slidably connected to the connecting block 211, and the other end extends toward the ratchet 12; the extended end of the telescopic block 212 is engaged with the ratchet 12; wherein, after the telescopic block 212 and the connecting block 211 slide tangentially along the engagement point of the telescopic card block 21 and the ratchet 12 to a preset position, a limiting member 213 is passed between the connecting block 211 and the telescopic block 212.

[0068] The telescopic block 212 and the connecting block 211 slide so that the telescopic block 212 extends tangentially along the meshing portion between the telescopic locking block 21 and the ratchet 12 , thereby compensating for wear and tear at the meshing portion.

[0069] By providing the limiting member 213 , the positions of the telescopic block and the connecting block 211 are fixed after being adjusted to the preset position, thereby preventing sliding in the meshing state and affecting the operation of the ratchet 12 .

[0070] See also Figure 6 In some embodiments, a plurality of limiting holes 214 are provided on the telescopic block 212 , and the plurality of limiting holes 214 are arranged at intervals along the sliding direction of the telescopic block 212 ; wherein one end of the limiting member 213 passes through the connecting block 211 and is screwed into one of the limiting holes 214 .

[0071] By providing a plurality of limiting holes 214, multi-position adjustment between the telescopic block 212 and the connecting block 211 is achieved, thereby ensuring the engagement between the telescopic locking block 21 and the ratchet 12. Specifically, the limiting hole 214 is a threaded hole for threaded connection with the limiting member 213.

[0072] See also Figure 6 For example, a connecting groove 216 is provided at one end of the connecting block 211 away from the hinged end, and a sliding portion 215 adapted to the connecting groove 216 is provided on the telescopic block 212; wherein, a plurality of limiting holes 214 are arranged at intervals on the sliding portion 215.

[0073] The connection groove 216 and the sliding portion 215 are provided to enable relative sliding between the connection block 211 and the telescopic block 212 .

[0074] Optionally, the connecting groove 216 is a U-shaped slot, and the sliding part 215 is a structure adapted to the U-shaped slot, that is, it is plugged between the connecting block 211 and the telescopic block 212; the limiting member 213 is a limiting screw, which passes through the connecting block 211 and is screwed into the corresponding limiting hole 214 on the sliding part 215.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Hollow ratchet wrench manual installation, characterized by: include: An installation housing (1) is provided with an accommodating cavity (11) therein, a ratchet (12) is provided in the accommodating cavity (11), and an end face of an axis of one side of the ratchet (12) passes through the installation housing (1) and is used for connection with an adjusting sleeve; The card engine unit (2) comprises two groups of telescopic card engine blocks (21) symmetrically distributed on both radial sides of the ratchet (12); one end of the telescopic card engine block (21) is hinged on the mounting shell (1), and the other end of the telescopic card engine block (21) extends to the outer edge of the ratchet (12) for engaging with the ratchet (12); a group of first elastic members (22) are provided on opposite sides of the two groups of telescopic card engine blocks (21), and the first elastic members (22) are connected to the inner wall of the mounting shell (1); as well as The reversing unit (3) comprises a cam block (31) located between the two groups of telescopic locking blocks (21), and a toggle member (32) having one end fixed to the cam block (31) and the other end axially rotated out of the mounting housing (1) along the ratchet wheel (12); the cam block (31) has three abutting planes (311) arranged in sequence in a triangular shape, and an abutting arc surface (312) is provided between each two adjacent abutting planes (311); When one of the telescopic card blocks (21) is engaged with the ratchet (12), the telescopic card block (21) abuts against one of the abutting planes (311), and the abutting arc surface (312) opposite to the abutting plane (311) abuts against another group of the telescopic card blocks (21).

2. The hollow ratchet wrench manual assembly according to claim 1, characterized in that: The mounting housing (1) comprises: The bottom shell (13) is provided with the accommodating cavity (11) inside, and the top of the bottom shell (13) is provided with a mounting groove (15) communicating with the accommodating cavity (11); the outside of the bottom shell (13) away from the card engine unit (2) is provided with an inwardly recessed limiting groove (132); a cover plate (14), which is disposed in the mounting groove (15) and is detachably connected to the bottom shell (13); One side of the ratchet (12) passes through the bottom of the bottom shell (13); one end of the shifting member (32) passes through the bottom of the bottom shell (13) and is placed in the limiting groove (132).

3. The hollow ratchet wrench manual assembly according to claim 2, characterized in that: The cover plate (14) and the bottom shell (13) are connected via a plurality of threaded connectors.

4. The hollow ratchet wrench manual assembly according to claim 2, characterized in that: A plurality of first magnets (16) are provided at intervals on the outer peripheral surface of the cover plate (14) facing the groove wall of the installation groove (15), and a plurality of second magnets (17) corresponding one-to-one to the plurality of first magnets (16) are provided on the bottom shell (13), and the first magnets (16) and the second magnets (17) are magnetically connected.

5. The hollow ratchet wrench manual assembly according to claim 4, characterized in that: The cover plate (14) has an outer peripheral surface facing the groove wall of the installation groove (15) and is recessed inwardly to form a relief hole (141) and a first sliding groove (142) connected in sequence, and the first sliding groove (142) extends outward along the axial direction of the ratchet (12), and the first magnet (16) is slidably arranged in the first sliding groove (142); Each of the first magnets (16) corresponds to a set of first adjusting bolts (18), one end of each of the first adjusting bolts (18) is screwed into the cover plate (14), extends into the first sliding groove (142), and is fixedly connected to the first magnet (16); The second magnet (17) is provided on the bottom shell (13) at the joint with the clearance hole (141); After the cover plate (14) is placed in the mounting groove (15), the first adjusting bolt (18) drives the first magnet (16) to slide to the clearance hole (141), so that the first magnet (16) is magnetically connected to the second magnet (17).

6. The hollow ratchet wrench manual assembly according to claim 5, characterized in that: The bottom shell (13) is provided with a second slide groove (131) corresponding to the clearance hole (141) one by one, the second slide groove (131) extends in a direction perpendicular to the first slide groove (142), and the second magnet (17) is provided in the second slide groove (131); a second elastic member (19) is provided between the second magnet (17) and the bottom of the second slide groove (131); After the cover plate (14) is placed in the mounting groove (15), the first magnet (16) absorbs the second magnet (17) and causes the second magnet (17) to slide into the clearance hole (141), and the second elastic member (19) is in a stretched state.

7. The hollow ratchet wrench manual assembly according to claim 1, characterized in that: The toggle member (32) comprises: A connecting column (321), one end of which is fixed to the cam block (31) and the other end of which passes through the mounting housing (1) axially along the ratchet wheel (12); The dial handle (322) is arranged outside the mounting shell (1) and is fixed to the protruding end of the connecting column (321).

8. The hollow ratchet wrench manual assembly according to claim 1, characterized in that: The telescopic card block (21) comprises: A connecting block (211) is hinged to the inner wall of the mounting housing (1); a telescopic block (212), one end of which is slidably connected to the connecting block (211), and the other end of which extends toward the ratchet (12); the extended end of the telescopic block (212) is engaged with the ratchet (12); After the telescopic block (212) and the connecting block (211) slide to a preset position along the tangential direction of the engagement point between the telescopic locking block (21) and the ratchet (12), a limiting member (213) is provided between the connecting block (211) and the telescopic block (212).

9. The hollow ratchet wrench manual assembly according to claim 8, characterized in that: The telescopic block (212) is provided with a plurality of limiting holes (214), and the plurality of limiting holes (214) are arranged at intervals along the sliding direction of the telescopic block (212); wherein one end of the limiting member (213) passes through the connecting block (211) and is screwed into one of the limiting holes (214).

10. The hollow ratchet wrench manual assembly according to claim 9, characterized in that: A connecting groove (216) is provided at one end of the connecting block (211) away from the hinged end, and a sliding portion (215) adapted to the connecting groove (216) is provided on the telescopic block (212); wherein a plurality of the limiting holes (214) are arranged at intervals on the sliding portion (215).

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