Wrench tail end punching device

Abstract

The application relates to a star wrench tail end punching device, which comprises a workbench, a material placing seat, a pushing unit, a punching mechanism and a lifting unit. The material placing seat is provided with a material groove for placing the star wrench. The pushing unit is connected with the material placing seat and used for driving the material placing seat to move along the width of the workbench. The punching mechanism comprises a supporting frame arranged on the workbench and a plurality of punchers arranged on the supporting frame. The plurality of punchers are located directly above the material placing seat and arranged along the length of the material placing seat. The lifting unit is used in cooperation with the pushing unit, the lifting unit, the material placing seat and the plurality of punchers. In one punching operation, a plurality of star wrenches can be punched simultaneously. Compared with the traditional single-wrench sequential punching mode, the average time required for punching each wrench is greatly reduced, the punching quantity per unit time is significantly improved, and the overall production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of box wrench processing technology, and in particular to a box wrench end drilling device. Background Technology

[0002] In many industrial fields such as mechanical repair and assembly, as well as in daily maintenance scenarios, box wrenches are an extremely common and important hand tool. Among them, the single-ended striking box wrench, with its unique design, has a single working head on one end, which can be used precisely to tighten or loosen fasteners such as nuts and bolts; the other end is a flat hammer face, which can be used directly as a hammer for striking operations.

[0003] In practical use, to further enhance the usability and convenience of single-headed striking box wrenches, their flat striking surfaces are usually drilled. On one hand, drilling optimizes the wrench's center of gravity distribution. On the other hand, the resulting holes facilitate wrench suspension. When storing tools, the wrench can be suspended on a tool rack through the holes for easy categorization, management, and quick access; especially in high-altitude work scenarios, installing a safety rope through the holes effectively prevents the wrench from accidentally falling.

[0004] However, in the current process of drilling holes at the end of box wrenches, drilling is usually performed on individual wrenches one by one. Each wrench requires separate positioning, drilling, and removal. This not only makes the process cumbersome, but also lengthens the overall processing cycle and reduces processing efficiency due to the connection and waiting time between each step.

[0005] To address the aforementioned issues, a hole-drilling device for the end of a box wrench has been designed. Utility Model Content

[0006] This application provides a hole-drilling device for the tail end of a box wrench to solve the problem in the existing box wrench tail end drilling process in the related art, where drilling is performed sequentially on a single wrench in most cases, which reduces production efficiency.

[0007] In a first aspect, a hole-drilling device for the end of a box wrench is provided, comprising: Workbench; The material feeding base has a material slot for holding box wrenches; A pushing unit, which is connected to the feeding seat, is used to drive the feeding seat to move along the width of the worktable; A punching mechanism includes a support frame arranged on a workbench, a plurality of punching machines arranged on the support frame, the plurality of punching machines being located directly above a feeding seat and arranged along the length of the feeding seat; A lifting unit is mounted on the workbench and connected to the support frame, and is used to drive the support frame to lift.

[0008] In some embodiments, a U-shaped partition is provided on the workbench, and a material changing station is provided on the workbench, with the material changing station located at one end of the opening of the U-shaped partition.

[0009] In some embodiments, the feed trough is provided with multiple sets of positioning mechanisms. One set of positioning mechanisms includes a tail end positioning block and a head end positioning block arranged opposite each other in the feed trough. The tail end positioning block is used to position the flat hammering surface of the box wrench, and the head end positioning block is used to engage the single-end working head of the box wrench.

[0010] In some embodiments, the pushing unit includes multiple slide rails disposed on a worktable, sliders slidably disposed on the slide rails, a base disposed between the tops of the multiple sliders, and a feeding seat disposed on the base; Two electric push rods are mounted opposite each other on the worktable, and the piston rods of the electric push rods are connected to one side of the base; Two sets of limiting rods are respectively set on the worktable. The two sets of limiting rods move along the width of the worktable to limit the stroke of the feeding seat.

[0011] In some embodiments, the support frame includes a crossbeam arranged above the workbench, a fixed seat provided on one side of the crossbeam, the fixed seat being U-shaped, and the punching machine being mounted on the fixed seat; An auxiliary support is also provided on the crossbeam. The auxiliary support is U-shaped, and the top of the fixed base is connected to the auxiliary support by bolts.

[0012] In some embodiments, the drilling machine includes a drive motor mounted on a fixed base and a drill bit mounted on the output shaft of the drive motor.

[0013] In some embodiments, the lifting unit includes a mounting base on a workbench, a cylinder on the mounting base, and a lifting block arranged at the bottom of the mounting base. The piston rod of the cylinder passes through the mounting base and is connected to the lifting block. Two guide rods are arranged opposite to each other on the lifting block. Two cylinders are embedded opposite to each other on the mounting base. The guide rods are inserted into the corresponding cylinders. One side of the lifting block is connected to the crossbeam.

[0014] In some embodiments, the lifting unit further includes two guide seats disposed opposite to each other on the worktable, the two guide seats being located on both sides of the mounting base, the guide seats being provided with slide rods, and sliders being slidably disposed on the slide rods, one end of the sliders being connected to both ends of one side of the crossbeam.

[0015] This application provides a hole-punching device for the tail end of a box wrench. By using a pushing unit, a lifting unit, a feeding seat and multiple punching machines in cooperation, multiple box wrenches can be punched simultaneously in one punching operation. Compared with the traditional method of punching holes one wrench at a time, this greatly reduces the average time required for each wrench to punch holes and significantly increases the number of holes punched per unit time, thereby improving the overall production efficiency.

[0016] The push unit can automatically drive the feeding seat to move, realizing the conversion of the box wrench between feeding, drilling and discharging processes, which facilitates the loading and unloading operations of the staff and makes the production process smoother and more efficient. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural illustration provided for an embodiment of this application. Figure 1 ; Figure 2 A three-dimensional structural illustration provided for an embodiment of this application. Figure 2 ; Figure 3 A three-dimensional schematic diagram of the lifting unit provided in the embodiments of this application; Figure 4 Three-dimensional schematic diagram of the push unit provided in the embodiments of this application Figure 1 ; Figure 5 Three-dimensional schematic diagram of the push unit provided in the embodiments of this application Figure 2 ; Figure 6 This is a three-dimensional schematic diagram of the feeding seat provided in an embodiment of this application.

[0019] In the diagram: 1. Workbench; 2. Feeding seat; 21. Material trough; 3. Pushing unit; 4. Drilling mechanism; 41. Support frame; 411. Crossbeam; 412. Fixed seat; 413. Auxiliary bracket; 42. Drilling machine; 421. Drive motor; 422. Drill bit; 5. Lifting unit; 51. Mounting seat; 52. Cylinder; 53. Guide rod; 54. Cylinder body; 55. Guide seat; 56. Slide rod; 57. Slider II; 58. Lifting block; 6. Positioning mechanism; 61. Tail end positioning block; 62. Head end positioning block; 11. U-shaped enclosure; 12. Material changing station; 31. Slide rail; 32. Slider; 33. Base; 34. Electric push rod; 35. Limit rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] This application provides a hole-drilling device for the tail end of a box wrench, which can solve the problem in the existing box wrench tail end drilling process in related technologies, where drilling is performed sequentially on a single wrench in most cases, reducing production efficiency.

[0022] Please see Figures 1-3 A punching device for the end of a box wrench includes: a workbench 1; a feeding seat 2, on which a material slot 21 for placing box wrenches is provided; a pushing unit 3, which is connected to the feeding seat 2 and is used to drive the feeding seat 2 to move along the width of the workbench 1; a punching mechanism 4, which includes a support frame 41 arranged on the workbench 1, a plurality of punching machines 42 arranged on the support frame 41, the plurality of punching machines 42 being located directly above the feeding seat 2 and arranged along the length of the feeding seat 2; and a lifting unit 5, which is arranged on the workbench 1 and connected to the support frame 41, and is used to drive the support frame 41 to lift.

[0023] One by one, the box wrenches to be drilled are placed into the material trough 21 on the feeding seat 2. The material trough 21 is adapted to the width of the box wrenches and is positioned in the width direction. Then, the pushing unit 3 starts to work, driving the feeding seat 2 to move along the width direction of the worktable 1. By controlling the movement of the pushing unit 3, the feeding seat 2 can be moved to the drilling position directly below the drilling mechanism 4, so that the box wrenches in the material trough 21 are accurately aligned with the drilling machine 42.

[0024] It should be noted that in this embodiment, the material trough 21 is adapted to the box wrench, that is, its shape and size match the outline of the box wrench. When the box wrench is placed in the material trough 21, the side walls and bottom of the material trough 21 can fit tightly against the shape of the box wrench, playing a good role in accommodating and initially positioning the box wrench.

[0025] When the feeding seat 2 reaches the designated position, the lifting unit 5 is activated, and the lifting unit drives the support frame 41 to descend. Since multiple punching machines 42 are set on the support frame 41 and located directly above the feeding seat 2, arranged along the length of the feeding seat 2, when the support frame 41 descends, the multiple punching machines 42 will move downward synchronously to punch holes in the tail end of the box wrench in the corresponding position in the material trough 21. The punching machine 42 will penetrate the tail end of the box wrench to form the required hole.

[0026] After the drilling is completed, the lifting unit 5 drives the support frame 41 to rise, so that the drilling machine 42 leaves the box wrench. Then, the pushing unit 3 can drive the feeding seat 2 to move again, moving the punched box wrench out of the drilling area, and at the same time moving the unpunched box wrench to the drilling position for the next round of drilling operation.

[0027] By using the push unit 3, lifting unit 3, feeding seat 2 and multiple punching machines 42 in combination, multiple box wrenches can be punched simultaneously in one punching operation. Compared with the traditional method of punching holes one by one with a single wrench, this greatly reduces the average time required for each wrench to punch holes and significantly increases the number of holes punched per unit time, thereby improving the overall production efficiency.

[0028] The push unit 3 can automatically drive the feeding seat 2 to move, realizing the conversion of the box wrench between feeding, drilling and discharging processes, which facilitates the loading and unloading operations of the staff and makes the production process smoother and more efficient.

[0029] Multiple punching machines 42 operate simultaneously, and the support frame 41 is raised and lowered by a unified lifting unit 5, ensuring that each punching machine 42 has the same pressure and speed during the punching process.

[0030] In one embodiment, a U-shaped partition 11 is provided on the workbench 1, and a material changing station 12 is provided on the workbench 1, the material changing station 12 being located at one end of the opening of the U-shaped partition 11. The U-shaped partition 11 includes a U-shaped frame, on which three glass plates are provided.

[0031] The material exchange station 12, located at one end of the opening of the U-shaped enclosure 11, forms a clear material exchange area. During the production process, wrenches to be drilled can be placed in an orderly manner near the material exchange station 12 for easy access later; wrenches that have already been drilled can also be placed here for unified collection and subsequent processing.

[0032] The three glass panels installed on the frame of the U-shaped enclosure 11 not only serve a safety protection function, but also provide a good field of vision, making it convenient for operators to inspect and adjust, and ensuring the smooth operation of production.

[0033] like Figure 4 , Figure 5 and Figure 6 As shown, further, the material trough 21 is provided with multiple sets of positioning mechanisms 6. Each set of positioning mechanisms 6 includes a tail end positioning block 61 and a head end positioning block 62 arranged opposite to each other in the material trough 21. The tail end positioning block 61 is used to position the flat hammering surface of the box wrench, and the head end positioning block 62 is used to engage the single-end working head of the box wrench.

[0034] When the operator places the box wrench into the feed trough 21, the feed trough 21 provides a general placement range for the wrench.

[0035] When placing the wrench, the operator brings the flat hammer face of the wrench close to the tail end positioning block 61, so that it contacts the tail end positioning block 61, thereby initially determining the position of the wrench at the tail end in the length direction of the material trough 21.

[0036] Meanwhile, the head end positioning block 62 is used to engage the single-end working head of the box wrench. After the flat hammering surface of the wrench contacts the tail end positioning block 61, the operator further adjusts the position of the wrench so that the single-end working head is engaged in the head end positioning block 62. The shape and size of the head end positioning block 62 match the single-end working head, which can fix the position of the working head and thus determine the position of the head end of the wrench in the length direction of the material trough 21.

[0037] The wrench is positioned along the length of the feed trough 21 by the combined action of the tail end positioning block 61 and the head end positioning block 62.

[0038] The positioning mechanism 6 precisely positions the box wrench using the tail end positioning block 61 and the head end positioning block 62, ensuring that each box wrench is at the same height in the material trough 21. During the drilling process, the drilling machine 42 can accurately act on the pre-set position at the tail end of the wrench.

[0039] It should be noted that in this embodiment, multiple perforated slots are opened in the material trough 21.

[0040] The punching slot matches the drill bit of the punching machine 42. When the pushing unit pushes the material feeding seat 2 along with the box wrench in the material trough 21 to the punching position, the drill bit of the punching machine 42 is precisely aligned with the punching slot in the material trough 21. During the punching process, the drill bit can smoothly pass through the punching slot and punch the box wrench placed in the material trough 21.

[0041] The size of the drill groove is determined according to the diameter of the hole to be drilled by the box wrench, ensuring that the drill bit can accurately act on the predetermined position of the wrench to achieve a high-quality drilling operation.

[0042] like Figure 2 Diagram and Figure 5As shown, in one embodiment, the pushing unit 3 includes multiple slide rails 31 disposed on the worktable 1, sliders 32 slidably disposed on the slide rails 31, a base 33 disposed between the tops of the multiple sliders 32, and the feeding seat 2 disposed on the base 33; two electric push rods 34 disposed opposite to each other on the worktable 1, the piston rods of the electric push rods 34 being connected to one side of the base 33; and two sets of limiting rods 35 disposed opposite to each other on the worktable 1, the two sets of limiting rods 35 moving along the width of the worktable 1 to limit the stroke of the feeding seat 2.

[0043] The slider 32 is slidably mounted on the slide rail 31 and can move smoothly along the direction of the slide rail 31. The base 33 set between the tops of the multiple sliders 32 connects the sliders 32 into a whole, forming a stable moving platform.

[0044] The material feeding seat 2 is mounted on the base 33, so that the material feeding seat 2 can move together with the base 33 on the slide rail 31.

[0045] When the electric push rod 34 receives a control signal, its piston rod will extend or retract. When it is necessary to push the feeding seat 2 forward, the piston rod of the electric push rod 34 extends, pushing the base 33 to move forward along the slide rail 31, thereby driving the feeding seat 2 and the box wrench on it to move forward to the drilling position. After the drilling is completed, the piston rod of the electric push rod 34 retracts, driving the feeding seat 2 back to its initial position.

[0046] At the same time, when the base 33 moves the feeding seat 2, if it moves to the preset limit position, the base 33 will contact the limit rod 35, and the limit rod 35 will prevent the base 33 from continuing to move, thereby preventing the feeding seat 2 from exceeding the safe movement range.

[0047] The combination of multiple slide rails 31 and sliders 32 provides multi-point support for the base 33 and the feeding seat 2. Compared with single-point or few-point support, this multi-point support method can make the feeding seat 2 more evenly stressed during movement, reducing shaking and vibration caused by uneven stress.

[0048] Meanwhile, the slide rail 31 provides guidance for the movement of the slider 32, and the slider 32 can only move along the direction set by the slide rail 31 without deviation or tilting.

[0049] The electric push rod 34, as a power source, has the advantage of precise control. The electric push rod 34 can precisely control the extension and retraction length of the piston rod through the control system, thereby achieving precise control of the moving distance of the feeding seat 2. This is existing technology and will not be described in detail here.

[0050] like Figure 2 and Figure 3As shown, in one embodiment, the support frame 41 includes a crossbeam 411 arranged above the workbench 1, a fixed seat 412 is provided on one side of the crossbeam 411, the fixed seat 412 is U-shaped, and the punching machine 42 is mounted on the fixed seat 412; an auxiliary bracket 413 is also provided on the crossbeam 411, the auxiliary bracket 413 is U-shaped, and the top of the fixed seat 412 is connected to the auxiliary bracket 413 by bolts.

[0051] The crossbeam 411 is arranged above the workbench 1, providing the main lateral support structure for the entire support frame 41 and determining the approximate position range of the punching machine 42 in the horizontal direction.

[0052] The fixing seat 412 is U-shaped and is located on one side of the crossbeam 411. Its U-shaped structure provides installation space for the punch 42. The punch 42 is placed inside the fixing seat 412. The two side walls of the fixing seat can provide certain limiting and protection for the punch.

[0053] The auxiliary bracket 413 is U-shaped and is set on the crossbeam 411. It is connected to the top of the fixed seat 412 by bolts, which plays a role in reinforcement and support.

[0054] During the drilling process, the drilling machine 42 will generate vibration and impact force. The auxiliary bracket 413, through its connection with the fixed base 412, can distribute these forces to the crossbeam 411, thereby enhancing the stability of the entire support structure.

[0055] Furthermore, the auxiliary bracket 413 provides additional support points for the fixed base 412, further limiting the sway range of the fixed base 412 and the punch 42, and ensuring the stability of the punch in the vertical and horizontal directions.

[0056] like Figure 2 and Figure 3 As shown, in one embodiment, the drilling machine 42 includes a drive motor 421 mounted on a fixed base 412 and a drill bit 422 mounted on the output shaft of the drive motor 421.

[0057] The drive motor 421 serves as the power source for the drilling machine 42. When the drilling machine 42 is started, the drive motor 421 begins to run. As the output shaft of the drive motor 421 rotates, the drill bit 422 also rotates at high speed. This is existing technology and will not be described in detail here.

[0058] like Figure 2 and 3As shown, in one embodiment, the lifting unit 5 includes a mounting base 51 disposed on the workbench 1, a cylinder 52 disposed on the mounting base 51, and a lifting block 58 disposed at the bottom of the mounting base 51. The piston rod of the cylinder 52 passes through the mounting base 51 and is connected to the lifting block 58. Two guide rods 53 are disposed opposite to each other on the lifting block 58. Two cylinders 54 are embedded opposite to each other on the mounting base 51. The guide rods 53 are inserted into the corresponding cylinders 54. One side of the lifting block 58 is connected to the crossbeam 411.

[0059] When cylinder 52 receives a control signal and starts working, the compressed air inside it pushes the piston to move in a straight line, and the piston rod extends or retracts accordingly. The piston rod passes through the mounting base 51 and is connected to the lifting block 58, so that the lifting block 58 can move up and down along the direction of the piston rod. Since the crossbeam 411 is connected to the lifting block 58, when the lifting block 58 moves up and down, it will drive the crossbeam 411 to move up and down together. The movement of the crossbeam 411 will drive the entire drilling machine 42 to adjust its height.

[0060] At the same time, when the lifting block 58 moves up and down, the guide rod 53 slides up and down inside the cylinder 54. Through the interlocking, it plays a guiding role, ensuring that the lifting block 58 can only move up and down in the vertical direction, without any horizontal deviation or swaying, thus ensuring the stability and accuracy of the lifting process.

[0061] like Figure 3 and Figure 4 As shown, further, the lifting unit 5 in this embodiment also includes two guide seats 55 arranged opposite to each other on the workbench 1. The two guide seats 55 are located on both sides of the mounting base 51. A slide rod 56 is provided on the guide seat 55. A slider 57 is slidably arranged on the slide rod 56. One end of the slider 57 is connected to both ends of one side of the crossbeam 411.

[0062] Two guide seats 55 are arranged opposite each other on the workbench 1 and located on both sides of the mounting base 51, providing a mounting base for the slide rod 56. The slide rod 56 is vertically fixed on the guide seats 55, forming a vertical guide rail.

[0063] When the crossbeam 411 is raised and lowered by the lifting block 58, the second slider 57 will slide synchronously along the slide rod 56, so that the crossbeam 411 is constrained and guided by the cooperation of the second slider 57 and the slide rod 56 during the raising and lowering process, further restricting the movement trajectory of the crossbeam 411 and ensuring that it can only be raised and lowered smoothly in the vertical direction.

[0064] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0065] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hole-drilling device for the end of a box wrench, characterized in that, include: Workbench (1); The material feeding seat (2) has a material trough (21) for placing the box wrench. The push unit (3) is connected to the feeding seat (2) and is used to drive the feeding seat (2) to move along the width of the worktable (1); The punching mechanism (4) includes a support frame (41) arranged on the workbench (1), and a plurality of punching machines (42) arranged on the support frame (41). The plurality of punching machines (42) are located directly above the feeding seat (2) and are arranged along the length of the feeding seat (2). The lifting unit (5) is set on the workbench (1) and connected to the support frame (41), and is used to drive the support frame (41) to lift.

2. The punching device for the tail end of a box wrench as described in claim 1, characterized in that: The workbench (1) is provided with a U-shaped partition (11) and a material changing station (12) is provided on the workbench (1). The material changing station (12) is located at one end of the opening of the U-shaped partition (11).

3. The punching device for the end of a box wrench as described in claim 1, characterized in that: The material trough (21) is provided with multiple sets of positioning mechanisms (6). One set of positioning mechanisms (6) includes a tail end positioning block (61) and a head end positioning block (62) arranged opposite to each other in the material trough (21). The tail end positioning block (61) is used to position the flat hammering surface of the box wrench, and the head end positioning block (62) is used to engage the single-end working head of the box wrench.

4. The hole-drilling device for the tail end of a box wrench as described in claim 1, characterized in that: The pushing unit (3) includes multiple slide rails (31) arranged on the workbench (1), sliders (32) slidably arranged on the slide rails (31), a base (33) arranged between the tops of the multiple sliders (32), and the feeding seat (2) arranged on the base (33); Two electric push rods (34) are respectively set on the workbench (1), and the piston rod of the electric push rod (34) is connected to one side of the base (33); Two sets of limiting rods (35) are respectively set on the worktable (1). The two sets of limiting rods (35) move along the width of the worktable (1) to limit the stroke of the feeding seat (2).

5. The hole-drilling device for the tail end of a box wrench as described in claim 1, characterized in that: The support frame (41) includes a crossbeam (411) arranged above the workbench (1), and a fixed seat (412) is provided on one side of the crossbeam (411). The fixed seat (412) is U-shaped, and the punching machine (42) is mounted on the fixed seat (412). An auxiliary support (413) is also provided on the crossbeam (411). The auxiliary support (413) is U-shaped, and the top of the fixed seat (412) is connected to the auxiliary support (413) by bolts.

6. The punching device for the end of a box wrench as described in claim 1, characterized in that: The drilling machine (42) includes a drive motor (421) mounted on a fixed base (412) and a drill bit (422) mounted on the output shaft of the drive motor (421).

7. The hole-drilling device for the tail end of a box wrench as described in claim 5, characterized in that: The lifting unit (5) includes a mounting base (51) on the workbench (1), a cylinder (52) on the mounting base (51), and a lifting block (58) arranged at the bottom of the mounting base (51). The piston rod of the cylinder (52) passes through the mounting base (51) and is connected to the lifting block (58). Two guide rods (53) are arranged opposite to each other on the lifting block (58). Two cylinders (54) are embedded opposite to each other on the mounting base (51). The guide rods (53) are inserted into the corresponding cylinders (54). One side of the lifting block (58) is connected to the crossbeam (411).

8. The punching device for the end of a box wrench as described in claim 7, characterized in that: The lifting unit (5) also includes two guide seats (55) arranged opposite to each other on the workbench (1). The two guide seats (55) are located on both sides of the mounting base (51). A slide rod (56) is provided on the guide seat (55). A slider (57) is slidably provided on the slide rod (56). One end of the slider (57) is connected to both ends of one side of the crossbeam (411).

Images