Manual tapping auxiliary tool for bolt hole close to cylinder wall

Abstract

The invention provides a manual tapping auxiliary tool for a bolt hole close to a cylinder wall, and relates to the technical field of auxiliary tools, the tool comprises a base, a first extension sleeve and a tapping extension rod, the base is provided with a first positioning hole and a second positioning hole, the first positioning hole is internally provided with a variable-diameter compression bolt, and the second positioning hole is internally provided with a second extension sleeve; the variable-diameter pressing bolt is used for being connected with a bolt hole in the barrel, the linear distance between the axis of the second positioning hole and the axis of the first positioning hole is used for being consistent with the linear distance between the axis of the bolt hole in the barrel and the axis of a to-be-tapped hole in the barrel wall, and the first extension sleeve and the second positioning hole are coaxial and connected with the base. The tapping extension rod is in sliding connection with the first extension sleeve and rotates around the axis of the tapping extension rod, and the end, facing the to-be-tapped hole, of the tapping extension rod is used for being connected with a screw tap. In the tapping process, the tapping extension rod, the screw tap and the to-be-tapped hole can be located on the same straight line, and therefore the tapping quality of the to-be-tapped hole is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary tools, and in particular to a hand tapping auxiliary tool for a bolt hole adjacent to a cylinder wall. Background Art

[0002] There is a cylinder with an annular step on the inner wall of the cylinder, and holes to be tapped are distributed on the annular step. Due to the height difference between the inner wall and the top of the cylinder, the verticality of the tap during the tapping process is difficult to meet the tapping requirements, thereby reducing the tapping quality. Summary of the Invention

[0003] The problem solved by the invention is how to ensure the verticality of tapping to improve the tapping quality.

[0004] To solve the above problems, the present invention provides a hand-used tapping aid for bolt holes near the cylinder wall, comprising a base, a first extension sleeve and a tapping extension rod, the base being provided with a first positioning hole and a second positioning hole, the axes of the first positioning hole and the second positioning hole being parallel, a reducing clamping bolt being provided in the first positioning hole, the reducing clamping bolt being used to be connected to a bolt hole on the cylinder body, the straight-line distance between the second positioning hole and the axis of the first positioning hole being used to be consistent with the straight-line distance between the axis of a bolt hole on the cylinder body and a hole to be tapped on the cylinder wall, the first extension sleeve being coaxial with the second positioning hole and being connected to the base, the tapping extension rod being used to pass through the first extension sleeve and the second positioning hole, and being slidably connected to the first extension sleeve, and being rotatable around its own axis, and one end of the tapping extension rod being used to be connected to a tap.

[0005] Optionally, the hand tapping aid for the bolt hole near the cylinder wall also includes a bolt hole locating pin; the length direction of the base is consistent with the radial direction of the cylinder, the first locating hole and the second locating hole are arranged near one end of the base, and the bolt hole locating pin is arranged near the other end of the base, and the bolt hole locating pin is connected to the base and is used to connect with the other bolt hole on the cylinder.

[0006] Optionally, the hand tapping aid for bolt holes adjacent to the cylinder wall also includes an extension pin and a second extension sleeve, and a third positioning hole is also provided on the base, the third positioning hole is parallel to the axis of the first positioning hole, the second extension sleeve is coaxial with the third positioning hole and is connected to the base, the extension pin passes through the second extension sleeve and is slidably connected to the second extension sleeve, and the end of the extension pin is used to be plugged into another hole to be tapped on the cylinder wall.

[0007] Optionally, the hand tapping aid for the bolt hole near the barrel wall also includes a locking screw, and a positioning groove is provided on the tapping extension rod, the opening of the positioning groove faces the hole to be tapped and is used to be plugged into the tap, and the locking screw is screwed into the positioning groove along the radial direction of the tapping extension rod to connect with the tap.

[0008] Optionally, the base includes a first base body and a second base body symmetrical about its axis, the first base body and the second base body are slidingly connected, the first base body is provided with the first positioning hole and the second positioning hole, and the second base body is provided with the bolt hole positioning pin.

[0009] Optionally, it also includes a rotating shaft, a movable plate, a reducer with a reduction ratio of 1:2, a first rack, a second rack and a slide, the first rack is connected to the second seat body, the second rack is connected to the slide, the slide is slidably connected to the base along the radial direction of the base, the slide axis is consistent with the axis of the base, the input end of the reducer is connected to the first rack, the output end of the reducer is connected to the second rack, the rotating shaft is coaxial with the slide and is detachably connected to the slide, the movable plate is located above the base and parallel to the base, the movable plate is rotatably connected to the rotating shaft, and a limiting hole is provided on the movable plate, and the limiting hole is used for sliding connection with the tapping extension rod.

[0010] Optionally, the hand tapping aid for the bolt hole adjacent to the cylinder wall further includes a locking hook, one end of the locking hook is rotatably connected to the movable plate, and the other end of the locking hook is used to be engaged with the rotating shaft.

[0011] Optionally, a distance measuring system is provided on the tapping extension rod, and the distance measuring system is used to measure the straight-line distance between the tapping extension rod and the cylinder wall.

[0012] Optionally, a lubricating liquid pipeline is further included, wherein the lubricating liquid pipeline is used to introduce lubricating liquid, and the lubricating liquid pipeline is installed on the base and aligned with the hole to be tapped.

[0013] Optionally, a driving structure is provided on the base, and the driving structure is used to drive the tapping extension rod to rotate and also to drive the tapping extension rod to feed along its axis, and / or, a driving structure is provided on the base, and the driving structure is used to drive the tapping extension rod to rotate and also to drive the tapping extension rod to feed along its axis.

[0014] Compared with the related art, the present invention is a hand-tapping auxiliary tool for bolt holes near the cylinder wall. The base is connected to the bolt hole on the cylinder body through a variable diameter compression bolt set in the first positioning hole, so as to realize the installation and positioning of the base, ensure the stability of the base on the cylinder body, and use the straight-line distance between the axis of the second positioning hole on the base and the first positioning hole to be consistent with the straight-line distance between the axis of the bolt hole on the cylinder body and the axis of the hole to be tapped on the cylinder wall, so as to realize the replication of the relative position relationship between the bolt hole on the cylinder body and the hole to be tapped on the base. After the base is connected to the cylinder body, the second positioning hole can Align the hole to be tapped, and then use the first extension sleeve to be coaxial with the second positioning hole and connect it to the base. The tapping extension rod is slidably connected to the first extension sleeve and rotates around its own axis. The end of the tapping extension rod facing the hole to be tapped is used to connect with the tap, so that during the tapping process, the first extension sleeve limits the inclination of the tapping extension rod, ensuring that the tapping extension rod is always in a vertical state, thereby ensuring that the axis of the tapping extension rod coincides with the axis of the hole to be tapped, and then the tapping extension rod, the tap and the hole to be tapped can be located in a straight line, thereby ensuring the tapping quality of the hole to be tapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a hand tapping aid for bolt holes near a cylinder wall in an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the cylinder in an embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly of the movable body and the base in an embodiment of the present invention; Figure 4 Schematic diagram of the structure of the base in an embodiment of the present invention; Figure 5 Schematic diagram of the assembly of the movable plate and the base in an embodiment of the present invention; Figure 6 is a schematic structural diagram of the first base and the second base in an embodiment of the present invention when they are not separated from each other; Figure 7 2 is a schematic structural diagram of the first base and the second base in an embodiment of the present invention when they are away from each other; Figure 8 Schematic diagram of the structure of the lock hook in an embodiment of the present invention; Figure 9 Schematic diagram of the distribution of distance measuring sensors on the tapping extension rod in an embodiment of the present invention; Figure 10 Schematic diagram of the driving structure in an embodiment of the present invention.

[0016] Description of reference numerals: 1-base; 1a-first positioning hole; 1b-second positioning hole; 1c-first seat body; 1d-second seat body; 2-first extension sleeve; 3-tapping extension rod; 3a-positioning groove; 4-reducing clamping bolt; 5-bolt hole positioning pin; 6-extension pin; 7-second extension sleeve; 8-locking screw; 9-rotating shaft; 10-movable plate; 11-locking hook; 12-groove; 13-boss; 14-distance measuring system; 15-hole to be tapped; 16-driving structure; 161-stepping motor; 162-coupling; 163-nut; 17-reducer; 18-first rack; 19-second rack; 20-slide; 21-movable seat; 22-long hole; 23-card slot; 24-plug; 25-bolt hole. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] In the accompanying drawings, the X-axis represents horizontal position, with the positive direction of the X-axis (i.e., the direction indicated by the arrow on the X-axis) indicating the right side, and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) indicating the left side. In the accompanying drawings, the Y-axis represents front-to-back position, with the positive direction of the Y-axis (i.e., the direction indicated by the arrow on the Y-axis) indicating the front side, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) indicating the rear side. In the accompanying drawings, the Z-axis represents vertical position, with the positive direction of the Z-axis (i.e., the direction indicated by the arrow on the Z-axis) indicating the top side, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) indicating the bottom side. It should be noted that the aforementioned X-axis and Z-axis are merely for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention.

[0019] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be practiced in an order other than that illustrated or described herein.

[0020] Combine Figure 1As shown, an embodiment of the present invention provides a hand-used tapping aid for a bolt hole 25 near a cylinder wall, comprising a base 1, a first extension sleeve 2 and a tapping extension rod 3. A first positioning hole 1a and a second positioning hole 1b are provided on the base 1. The axes of the first positioning hole 1a and the second positioning hole 1b are parallel. A reducing clamping bolt 4 is provided in the first positioning hole 1a. The reducing clamping bolt 4 is used to connect with a bolt hole 25 on the cylinder body. The straight-line distance between the axes of the second positioning hole 1b and the first positioning hole 1a is used to be consistent with the straight-line distance between the axes of a bolt hole 25 on the cylinder body and a hole to be tapped 15 on the cylinder wall. The first extension sleeve 2 is coaxial with the second positioning hole 1b and is connected to the base 1. The tapping extension rod 3 is used to pass through the first extension sleeve 2 and the second positioning hole 1b, and is slidably connected to the first extension sleeve 2, and can rotate around its own axis. One end of the tapping extension rod 3 is used to be connected to a tap.

[0021] Specifically, the structure of the cylinder is as follows Figure 2 As shown, in Figure 2 In the embodiment, a bolt hole 25 is provided on the upper end surface of the cylinder, and a boss is provided on the inner wall of the cylinder. The boss is used to set a hole to be tapped 15. The axis of the hole to be tapped 15 is parallel to the axis of the bolt hole 25. There is a height difference between the hole to be tapped 15 and the upper end surface of the cylinder. Figure 1 As shown, the base 1 can be made of a lightweight material such as an alloy, and the length direction of the base 1 is consistent with the radial direction of the cylinder. The first positioning hole 1a and the second positioning hole 1b can be located at the negative end of the base 1 in the X-axis direction, that is, the left end of the base 1 is provided with the first positioning hole 1a and the second positioning hole 1b, the first positioning hole 1a is coaxial with the bolt hole 25 on the cylinder, the reducing clamping bolt 4 is assembled in the first positioning hole 1a, and the reducing clamping bolt 4 is used to connect with the bolt hole 25 on the cylinder. The base 1 is connected to the cylinder 1 through the reducing clamping bolt 4. On the cylinder, the linear distance between the axis of the hole to be tapped 15 and the axis of the bolt hole 25 in the horizontal direction is the first distance. On the base 1, the axis of the first positioning hole 1a and the axis of the second positioning hole 1b in the horizontal direction are the second distance, and the second distance is equal to the first distance, so that the positional relationship between the hole to be tapped 15 and the bolt hole 25 is replicated on the base 1. Since the length direction of the base 1 is consistent with the radial direction of the cylinder, after the base 1 is connected to the cylinder 1 by the reducing clamping bolt 4, the axis of the second positioning hole 1b coincides with the axis of the hole to be tapped 15, that is, the second positioning hole 1b is aligned with the hole to be tapped 15. The first extension sleeve 2 is a sleeve. The first extension sleeve 2 is coaxial with the second positioning hole 1b and can be connected to the base 1 through a threaded connection. The first extension sleeve 2 can be installed at the upper end of the base 1, such as Figure 1As shown. The tapping extension rod 3 is a columnar structure. The length direction of the tapping extension rod 3 is consistent with the length direction of the first extension sleeve 2, and is slidably connected to the first extension sleeve 2. The tapping extension rod 3 can rotate around its own axis in the first extension sleeve 2, that is, the tapping extension rod 3 can not only slide up and down in the first extension sleeve 2, but also rotate in the first extension sleeve 2. When tapping, the tap is detachably connected to the end of the tapping extension rod 3 facing the hole to be tapped 15, that is, the lower end of the tapping extension rod 3. During the tapping process, the first extension sleeve 2 keeps the tapping extension rod 3 in a vertical state to ensure that the axis of the tapping extension rod 3 always coincides with the axis of the hole to be tapped 15, to ensure the verticality of the tap, and to ensure the accuracy of tapping.

[0022] Therefore, in this embodiment, the base 1 is connected to the bolt hole 25 on the cylinder body through the variable diameter clamping bolt 4 set in the first positioning hole 1a to realize the installation positioning of the base 1, ensure the stability of the base 1 on the cylinder body 1, and use the straight-line distance between the axis of the second positioning hole 1b on the base 1 and the first positioning hole 1a to be consistent with the straight-line distance between the axis of the bolt hole 25 on the cylinder body and the to-be-tapped hole 15 on the cylinder wall, so as to realize the relative position relationship between the bolt hole 25 of the cylinder body and the to-be-tapped hole 15 on the cylinder wall. After the base 1 is connected to the cylinder body, the second positioning hole 1b can be aligned with the to-be-tapped hole 15. , and then the first extension sleeve 2 is coaxial with the second positioning hole 1b and connected to the base 1, the tapping extension rod 3 is slidably connected to the first extension sleeve 2 and rotates around its own axis, and the end of the tapping extension rod 3 facing the hole to be tapped 15 is used to connect with the tap, so that during the tapping process, the first extension sleeve 2 limits the inclination of the tapping extension rod 3, ensuring that the tapping extension rod 3 is always in a vertical state, thereby ensuring that the axis of the tapping extension rod 3 coincides with the axis of the hole to be tapped 15, and then the tapping extension rod 3, the tap and the hole to be tapped 15 can be located in a straight line, thereby ensuring the tapping quality of the hole to be tapped 15.

[0023] Based on the above embodiments, combined with Figure 3As shown, the base 1 in the embodiment of the present invention can also be provided with a movable seat 21, and an elongated hole 22 is provided at the position of the movable seat 21 on the base 1, and the length direction of the elongated hole 22 is consistent with the length direction of the base 1, and the movable seat 21 is movably set in the elongated hole 22, and a second positioning hole 1b is provided on the movable seat 21, and the first extension sleeve 2 is connected to the movable seat 21, and the base 1 is provided with a plurality of card slots 23 along the moving direction of the movable seat 21, and a plug 24 is provided on the movable seat, which is connected to the movable seat 21 through an elastic member and can move in the vertical direction. When tapping, the horizontal distance between the first positioning hole 1a and the second positioning hole 1b can be adjusted by sliding the movable seat 21. After adjusting to the appropriate distance, the plug 24 is inserted into the corresponding card slot 23 through the elastic member to fix the movable seat 21. In this way, the first positioning hole 1a and the second positioning hole 1b can adapt to the positional relationship between the bolt hole 25 on different cylinders and the hole to be tapped 15, thereby improving the use flexibility of the hand tapping auxiliary tool for bolt holes near the cylinder wall in the embodiment of the present invention.

[0024] Optionally, combined Figure 1 As shown, the hand tapping aid for the bolt hole near the cylinder wall also includes a bolt hole 25 locating pin 5; the length direction of the base 1 is consistent with the radial direction of the cylinder, the first locating hole 1a and the second locating hole 1b are arranged near one end of the base 1, and the bolt hole 25 locating pin 5 is arranged near the other end of the base 1. The bolt hole 25 locating pin 5 is connected to the base 1 and is used to connect with another bolt hole 25 on the cylinder.

[0025] Specifically, the holes to be tapped 15 and the bolt holes 25 on the cylinder can be arranged in pairs, and the bolt holes 25 and the holes to be tapped 15 are distributed along the circumference of the cylinder, such as Figure 2 As shown, there are two holes 15 to be tapped and two bolt holes 25 at both ends of a radial direction of the cylinder. The bolt hole locating pin 5 is located at the end of the base 1 facing the positive direction of the X-axis. The bolt hole locating pin 5 is symmetrical with the first locating hole 1a about the axis of the base 1. The bolt hole locating pin 5 is connected to the base 1. After the bolt hole locating pin 5 is connected to the bolt hole on the cylinder, both ends of the base 1 in the length direction are fixed to the cylinder. The bolt hole locating pin 5 realizes secondary positioning of the base 1 and can ensure the structural stability of the base 1. For example, when the length of the base 1 is less than the inner diameter of the cylinder, the end of the base 1 in the positive direction of the X-axis appears to be suspended. Under the influence of gravity, the base 1 may undergo a slight downward deformation, which causes the axis of the second locating hole 1b to deviate from the axis of the hole 15 to be tapped, thereby affecting the tapping quality. After the secondary positioning of the base 1 is achieved by the bolt hole locating pin 5, both ends of the base 1 in the length direction can be supported by the cylinder, which can overcome the influence of the weight of the base 1 on its deformation.

[0026] Optionally, combined Figure 1As shown, the hand tapping aid for the bolt hole near the cylinder wall also includes an extension pin 6 and a second extension sleeve 7. A third positioning hole is also provided on the base 1. The third positioning hole is parallel to the axis of the first positioning hole 1a. The second extension sleeve 7 is coaxial with the third positioning hole and is connected to the base 1. The extension pin 6 passes through the second extension sleeve 7 and is slidably connected to the second extension sleeve 7, and the end of the extension pin 6 is used to be plugged into another hole to be tapped 15 on the cylinder wall.

[0027] Specifically, the structure of the second extension sleeve 7 can be similar to that of the first extension sleeve 2. A third positioning hole is also provided on the base 1, which is coaxial with the second extension sleeve 7. The second extension sleeve 7 is detachably connected to the base 1 via a threaded connector. The extension pin 6 is a stepped shaft, and the diameter of the lower end of the extension pin 6 is smaller than the diameter of the upper end of the extension pin 6. The extension pin 6 is slidably connected to the second extension sleeve 7, and the end of the extension pin 6 facing the hole to be tapped 15 is used for plugging into the hole to be tapped 15.

[0028] In this way, before tapping, after the two ends of the base 1 are connected to the cylinder, the extension pin 6 slides downward along the second extension sleeve 7, and the lower end of the extension pin 6 is plugged into the hole to be tapped 15, and then the tapping operation is performed. The plugging of the extension pin 6 and the hole to be tapped 15 can prevent the base 1 from rotating during the tapping process. At the same time, after the extension pin 6 is plugged into the hole to be tapped 15, the extension pin 6 can correct the level of the base 1 to prevent the base 1 from tilting, thereby ensuring the coincidence of the second positioning hole 1b on the base 1 and the axis of the hole to be tapped 15.

[0029] Optionally, combined Figure 1 As shown, the hand tapping aid for the bolt hole near the barrel wall also includes a locking screw 8. A positioning groove 3a is provided on the tapping extension rod 3. The opening of the positioning groove 3a faces the hole to be tapped 15 and is used to be plugged into the tap. The locking screw 8 is screwed into the positioning groove 3a along the radial direction of the tapping extension rod 3 to be connected to the tap.

[0030] Specifically, the positioning groove 3a is located at the lower end of the tapping extension rod 3, and the opening of the positioning groove 3a is downward. A threaded connection hole that horizontally passes through the positioning groove 3a is provided on the side wall of the positioning groove 3a. After the positioning groove 3a is plugged into the tap, the locking screw 8 is screwed into the positioning groove 3a along the radial direction of the tapping extension rod 3 through the threaded connection hole on the positioning groove 3a to connect with the tap. In this way, the movement of the tap can be restricted to ensure the stability of the tap during the tapping process.

[0031] Optionally, combined Figure 4 As shown, the base 1 includes a first base body 1c and a second base body 1d that are symmetrical about its axis. The first base body 1c and the second base body 1d are slidingly connected. The first base body 1c is provided with a first positioning hole 1a and a second positioning hole 1b, and the second base body 1d is provided with a bolt hole positioning pin 5.

[0032] Specifically, the base 1 includes a first base body 1c and a second base body 1d, and the first base body 1c and the second base body 1d are symmetrical about the axis of the base 1. The first positioning hole 1a and the second positioning hole 1b are located at the left end of the first base body 1c, and the bolt hole positioning pin 5 is located at the right end of the second base body 1d. The first base body 1c and the second base body 1d are slidingly connected. When cylinders of different diameters are tapped, after the first base body 1c is connected to the cylinder, the second base body 1d can move away from the first base body 1c, and after the second base body 1d is connected to the cylinder through the bolt hole positioning pin 5, the base 1 can be fixed on the cylinder.

[0033] In this way, the first base body 1c and the second base body 1d are slidably connected, and the first base body 1c is provided with a first positioning hole 1a and a second positioning hole 1b, and the second base body 1d is provided with a bolt hole positioning pin 5. The usable length of the base 1 can adapt to cylinders of different diameters to improve the flexibility of use of the base 1.

[0034] Optionally, combined Figure 5 As shown, it also includes a rotating shaft 9, a movable plate 10, a reducer 17 with a reduction ratio of 1:2, a first rack 18, a second rack 19 and a slide 20. The first rack 18 is connected to the second base body 1d, the second rack 19 is connected to the slide 20, the slide 20 is slidably connected to the base body 1 along the length direction of the base body 1, the axis of the slide 20 is consistent with the axis of the base 1, the input end of the reducer 17 is connected to the first rack 18, the output end of the reducer 17 is connected to the second rack 19, the rotating shaft 9 is coaxial with the slide 20 and is detachably connected to the slide 20, the movable plate 10 is located above the base 1 and parallel to the base 1, the movable plate 10 is rotatably connected to the rotating shaft 9, and a limiting hole is provided on the movable plate 10, which is used for sliding connection with the tapping extension rod 3.

[0035] Specifically, the slide 20 is slidably connected to the upper end of the base 1, that is, the slide 20 can be slidably connected to the first base 1c and the second base 1d respectively. The first rack 18 is installed on the side end of the second base 1d (the second base 1d is located at the negative end of the Y axis), and the reducer 17 is installed on the upper end of the first base 1c. The reducer 17 is located on the side of the slide 20 away from the second base 1d. The input end of the reducer 17 is connected to the first rack 18 through a gear, and the output end of the reducer 17 is connected to the second rack 19 through a gear. The second rack 19 is connected to the slide 20. At the same time, a mounting structure is provided on the slide 20. The mounting structure can be detachably connected to the rotating shaft 9 so that the rotating shaft 9 is vertically fixed on the slide 20. In addition, the movable plate 10 is located above the base 1 and parallel to the base 1. The movable plate 10 is rotatably connected to the rotating shaft 9, and the limiting hole on the movable plate 10 is slidably connected to the tapping extension rod 3. It should also be emphasized that when the first seat body 1c and the second seat body 1d are not far away from each other, the axis of the slide 20 coincides with the axis of the base 1, that is, when the first seat body 1c and the second seat body 1d are not far away from each other, the first seat body 1c and the second seat body 1d are also symmetrical about the axis of the slide 20.

[0036] The hand tapping aid for bolt holes near the barrel wall in this embodiment can be used in at least the following situations: Combine Figure 6 As shown, when the first seat body 1c and the second seat body 1d are not far away from each other, that is, the diameter of the cylinder remains unchanged, the axis of the slide 20 coincides with the axis of the seat body 1, and the rotating shaft 9 is vertically installed on the slide 20 so that the axis of the rotating shaft 9 coincides with the axis of the seat body 1. After the movable plate 10 is rotatably connected to the rotating shaft 9, the movable plate 10 can be appropriately rotated so that the limiting hole on the movable plate 10 is aligned with the hole to be tapped 15 on the cylinder. Then, the tapping extension rod 3 with a tap installed is inserted into the limiting hole on the movable plate 10, and tapping can be performed. At the same time, an additional tapping extension rod 3 can be used to synchronously tap using the second positioning hole 1b on the base 1, thereby significantly improving the tapping efficiency.

[0037] Combine Figure 7As shown, when the first seat body 1c and the second seat body 1d are away from each other, that is, when tapping a cylinder with a larger diameter, after the first seat body 1c is connected to the cylinder, the second seat body 1d is manually driven to move away from the first seat body 1c. During the process of the second seat body 1d moving away from the first seat body 1c, the slide 20 is synchronously moved away from the first seat body 1c through the reducer 17. The reduction ratio of the reducer 17 is 1:2, and the moving distance of the second seat body 1d is twice the moving distance of the slide 20. After the second seat body 1d is connected to the cylinder, the second seat body 1d is manually driven to move away from the first seat body 1c. The first body 1c and the second body 1d are still symmetrical about the axis of the slide 20. At this time, the rotating shaft 9 is connected to the slide 20, and the movable plate 10 is rotatably connected to the rotating shaft 9. The rotating axis of the movable plate 10 is consistent with the axis of the base 1. It can also be understood that the axis of the movable plate 10 coincides with the axis of the cylinder, thereby enabling the limiting holes on the movable plate 10 to move along the distribution direction of the holes 15 to be tapped on the cylinder with a larger diameter. Of course, the movable plate 10 can also be adjusted to a telescopic structure, that is, similar to the structure of the base 1. As a result, the hand tapping aid for bolt holes near the cylinder wall in this embodiment can be applied to cylinders of different diameters to improve the flexibility of the hand tapping aid for bolt holes near the cylinder wall.

[0038] When the movable plate 10 is rotated to a suitable position, the extended pin 6 can be used to precisely adjust the position of the movable plate 10 to ensure that the axis of the limiting hole on the movable plate 10 coincides with the axis of the hole to be tapped 15 .

[0039] In this way, the movable plate 10 is located above the base 1 and parallel to the base 1, and the movable plate 10 is rotatably connected to the rotating shaft 9, so that the horizontal rotation of the movable plate 10 is realized during the rotation of the movable plate 10, and the movable plate 10 is prevented from tilting due to the rotation of the movable plate 10, thereby ensuring that the axis of the limiting hole slidably connected to the tapping extension rod 3 always remains vertical, and then the rotating shaft 9 is coaxial with the base 1 and detachably connected to the base 1, so that a modular design of the hand tapping aid for the bolt hole near the barrel wall is realized, and it can meet different tapping conditions, improve the flexibility of use of the hand tapping aid for the bolt hole near the barrel wall, and also improve the tapping efficiency.

[0040] Optionally, combined Figure 8 As shown, the hand tapping aid for the bolt hole near the cylinder wall also includes a locking hook 11 , one end of the locking hook 11 is rotatably connected to the movable plate 10 , and the other end of the locking hook 11 is used to be clamped with the rotating shaft 9 .

[0041] Specifically, the movable plate 10 is sleeved on the rotating shaft 9, and the upper end of the rotating shaft 9 extends from the movable plate 10. The upper end of the rotating shaft 9 is provided with a plurality of slots, which are distributed along the circumference of the rotating shaft 9. One end of the lock hook 11 can be rotatably mounted on the movable plate 10 via a socket spring, wherein the socket spring can overcome the rotation of the lock hook 11 away from the rotating shaft 9. During use, the lock hook 11 can be manually rotated to rotate the lock hook 11 away from the rotating shaft 9, and the elastic force of the socket spring increases. When the movable plate 10 is rotated to a suitable position, the lock hook 11 is released, and the lock hook 11 rotates toward the rotating shaft 9 under the elastic force of the socket spring to engage with the slots on the rotating shaft 9, thereby limiting the rotation of the movable plate 10.

[0042] In this way, one end of the lock hook 11 is rotatably connected to the movable plate 10, and the other end of the lock hook 11 is used to engage with the rotating shaft 9, so that after the lock hook 11 is engaged with the rotating shaft 9, the rotation of the movable plate 10 can be limited to improve the stability of the movable plate 10 during the tapping process.

[0043] Optionally, combined Figure 9 As shown, a distance measuring system is provided on the tapping extension rod 3, and the distance measuring system is used to measure the straight-line distance between the tapping extension rod 3 and the cylinder wall.

[0044] Specifically, the distance measuring system may include two distance measuring sensors 14, a power supply, and an indicator light. The two distance measuring sensors 14 are distributed in the two positioning grooves of the tapping extension rod 3 along the axial direction of the tapping extension rod 3. The two distance measuring sensors 14 measure the straight-line distance between the tapping extension rod 3 and the inner wall of the cylinder. If the distance between the tapping extension rod 3 and the inner wall of the cylinder is constant, that is, when the tapping extension rod 3 is always vertical, the distance between the two distance measuring sensors 14 and the inner wall of the cylinder remains unchanged, and the indicator light turns green. If the tapping extension rod 3 tilts during the tapping process, the distance measured by any of the distance measuring sensors 14 changes, and the indicator light turns red, indicating that the position of the tapping extension rod 3 needs to be adjusted.

[0045] In this way, by providing a distance measuring system on the tapping extension rod 3, the distance measuring system is used to measure the straight-line distance between the tapping extension rod 3 and the cylinder wall, which can realize auxiliary detection of the verticality of the tapping extension rod 3 to ensure the reliability of the use of the tapping extension rod 3.

[0046] Optionally, a lubricating liquid pipeline is further included, which is used to introduce lubricating liquid. The lubricating liquid pipeline is installed on the base 1 and aligned with the hole 15 to be tapped.

[0047] Specifically, during tapping, the lubricating liquid can flow into the hole to be tapped 15 through the lubricating liquid pipeline to achieve lubrication during the tapping process, thereby improving the tapping efficiency.

[0048] Optionally, combined Figure 10As shown, a driving structure 16 is provided on the base 1, and the driving structure 16 is used to drive the tapping extension rod 3 to rotate and also to drive the tapping extension rod 3 to feed along its axis, and / or, a driving structure 16 is provided on the base 1, and the driving structure 16 is used to drive the tapping extension rod 3 to rotate and also to drive the tapping extension rod 3 to feed along its axis.

[0049] Specifically, taking the base 1 as an example, the driving structure 16 may include a stepper motor 161, a coupling 162, and a nut 163. The stepper motor 161 is installed on the first base body 1c, and the output end of the stepper motor 161 is connected to the input end of the coupling 162. The output end of the coupling 162 is spline-connected to the tapping extension rod 3. The nut 163 is installed on the first extension sleeve 2 and is threadedly connected to the tapping extension rod 3. When the stepper motor 161 drives the tapping extension rod 3 to rotate through the coupling 163, the tapping extension rod 3 slides along the first extension sleeve 2 toward the hole to be tapped 15 through the nut 163 to realize automated tapping, thereby reducing the labor intensity of workers.

[0050] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A hand tapping tool for bolt holes near the cylinder wall, characterized in that: The utility model comprises a base (1), a first extension sleeve (2) and a tapping extension rod (3), wherein the base (1) is provided with a first positioning hole (1a) and a second positioning hole (1b), the axes of the first positioning hole (1a) and the second positioning hole (1b) are parallel, a reducing clamping bolt (4) is provided in the first positioning hole (1a), the reducing clamping bolt (4) is used to be connected with a bolt hole (25) on the cylinder, the straight-line distance between the axes of the second positioning hole (1b) and the first positioning hole (1a) is used to be consistent with the straight-line distance between the axes of the bolt hole on the cylinder and the hole to be tapped (15) on the cylinder wall, the first extension sleeve (2) is coaxial with the second positioning hole (1b) and is connected to the base (1), the tapping extension rod (3) is used to pass through the first extension sleeve (2) and the second positioning hole (1b), and is slidably connected with the first extension sleeve (2), and can rotate around its own axis, and one end of the tapping extension rod (3) is used to be connected with a tap.

2. The hand tapping tool for bolt holes near the cylinder wall according to claim 1, characterized in that: It also includes a bolt hole locating pin (5); the length direction of the base (1) is consistent with the radial direction of the cylinder, the first locating hole (1a) and the second locating hole (1b) are arranged near one end of the base (1), and the bolt hole locating pin (5) is arranged near the other end of the base (1), and the bolt hole locating pin (5) is connected to the base (1) and is used to connect with the other bolt hole (25) on the cylinder.

3. The hand tapping tool for bolt holes near the cylinder wall according to claim 1, characterized in that: It also includes an extension pin (6) and a second extension sleeve (7), and a third positioning hole is provided on the base (1), the third positioning hole is parallel to the axis of the first positioning hole (1a), the second extension sleeve (7) is coaxial with the third positioning hole and is connected to the base (1), the extension pin (6) passes through the second extension sleeve (7) and is slidably connected to the second extension sleeve (7), and the end of the extension pin (6) is used to be plugged into the other hole to be tapped (15) on the cylinder wall.

4. The hand tapping tool for bolt holes near the cylinder wall according to claim 1, characterized in that: The invention also includes a locking screw (8). A positioning groove (3a) is provided on the tapping extension rod (3). The opening of the positioning groove (3a) faces the hole to be tapped (15) and is used for plugging with the tap. The locking screw (8) is screwed into the positioning groove (3a) along the radial direction of the tapping extension rod (3) to connect with the tap.

5. The hand tapping tool for bolt holes near the cylinder wall according to claim 2, characterized in that: The base (1) comprises a first base body (1c) and a second base body (1d) symmetrical about its axis, the first base body (1c) and the second base body (1d) being slidably connected, the first base body (1c) being provided with the first positioning hole (1a) and the second positioning hole (1b), and the second base body (1d) being provided with the bolt hole positioning pin (5).

6. The hand tapping tool for bolt holes adjacent to cylinder walls according to claim 5, characterized in that: The invention also includes a rotating shaft (9), a movable plate (10), a reducer (17) with a reduction ratio of 1:2, a first rack (18), a second rack (19) and a slide (20), wherein the first rack (18) is connected to the second seat (1d), the second rack (19) is connected to the slide (20), the slide (20) is slidably connected to the base (1) along the radial direction of the base (1), the axis of the slide (20) is consistent with the axis of the base (1), and the output of the reducer (17) is The input end is connected to the first rack (18), the output end of the reducer (17) is connected to the second rack (19), the rotating shaft (9) is coaxial with the slide (20) and is detachably connected to the slide (20), the movable plate (10) is located above the base (1) and parallel to the base (1), the movable plate (10) is rotatably connected to the rotating shaft (9), and a limiting hole is provided on the movable plate (10), and the limiting hole is used for sliding connection with the tapping extension rod (3).

7. The hand tapping tool for bolt holes adjacent to cylinder walls according to claim 6, characterized in that: It also includes a locking hook (11), one end of which is rotatably connected to the movable plate (10), and the other end of which is used to be engaged with the rotating shaft (9).

8. The hand tapping tool for bolt holes adjacent to cylinder walls according to claim 1, characterized in that: The tapping extension rod (3) is provided with a distance measuring system, and the distance measuring system is used to measure the straight-line distance between the tapping extension rod (3) and the cylinder wall.

9. The hand tapping tool for bolt holes adjacent to cylinder walls according to claim 1, characterized in that: It also includes a lubricating liquid pipeline, which is used to pass lubricating liquid. The lubricating liquid pipeline is installed on the base (1) and is aligned with the hole to be tapped (15).

10. The hand tapping tool for bolt holes adjacent to cylinder walls according to claim 5, characterized in that: The base (1) is provided with a driving structure (16), and the driving structure (16) is used to drive the tapping extension rod (3) to rotate and also to drive the tapping extension rod (3) to feed along its axis, and / or the base (1) is provided with a driving structure (16), and the driving structure (16) is used to drive the tapping extension rod (3) to rotate and also to drive the tapping extension rod (3) to feed along its axis.

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