Spark plug sleeve driving tool
By using a combination of limit sleeve and buffer rod in the spark plug sleeve insertion tooling, the problems of inaccurate depth of spark plug sleeve insertion and damage to the cylinder head are solved, and an efficient and accurate assembly process is achieved, and the damage risk and replacement cost are reduced.
Patent Information
- Application Number
- CN202421955921.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-13
AI Technical Summary
During the assembly process of automobile engine, when the spark plug sleeve is penetrated into the bottom hole of the cylinder head, it is difficult to ensure the accuracy of the drilling depth and the integrity of the cylinder head, which can easily lead to damage to the bottom hole of the cylinder head and the spark plug sleeve.
The spark plug sleeve including a buffer rod and a limit sleeve is used to penetrate the tooling. Through the coordination positioning of the limit sleeve with the bottom hole of the engine cylinder head and the spark plug sleeve, it ensures that the spark plug sleeve remains coaxial with the bottom hole during the punching process, reduces shear force, and controls the drilling depth through the limit sleeve of different lengths.
The accurate insertion of the spark plug casing into the bottom hole of the engine cylinder head reduces the risk of damage to the cylinder head and casing, improves assembly efficiency and pass rate, and reduces replacement costs.
Smart Images
Figure CN223029491U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of spark plug assembly, and more specifically, relates to a spark plug sleeve driving tooling. Background Art
[0002] The spark plug sleeve is used to protect the spark plug and the cylinder head during the installation of the spark plug in the automobile engine. Usually, the outer cylindrical surface of the spark plug sleeve needs to be press-fitted into the corresponding bottom hole of the cylinder head by interference fit. Therefore, how to achieve rapid and accurate driving has a great impact on the final quality of the cylinder head. During the engine assembly stage, when installing the spark plug sleeve, a nylon rod is usually used for buffering and directly driven in. During the driving process of the spark plug sleeve, it is necessary to ensure that the driving depth is accurate. Usually, the driving depth tolerance is ±0.3 mm and it is necessary to ensure that the cylinder head and the sleeve are not damaged. Since there is no depth limit for the sleeve hole on the cylinder head and the traditional press-fitting relies on the self-guidance of the sleeve, a large tangential force is generated on the side wall of the bottom hole at the initial stage of driving, which is easy to cause cracking, thus reducing the qualification rate of driving the spark plug sleeve. Moreover, the operator needs to measure the driving depth at any time, which affects the trial production efficiency. Content of the Utility Model
[0003] The purpose of the utility model is to provide a spark plug sleeve driving tooling. Through the cooperation and positioning of the limiting sleeve with the bottom hole of the engine cylinder head and the spark plug sleeve, the spark plug sleeve maintains a high coaxiality with the bottom hole during the driving process, reduces the shear force generated by the spark plug sleeve on the bottom hole of the cylinder head during the driving process, and avoids the risk of damage to the bottom hole of the cylinder head and the spark plug sleeve; different driving depths are controlled by replacing the limiting sleeves with different lengths; the limiting and buffering part of the buffer rod is detachably and fixedly connected to the handle, which is convenient for replacement when damaged and reduces the replacement cost.
[0004] The specific solution is as follows:
[0005] A spark plug sleeve driving tooling includes a buffer rod and a limiting sleeve. A limiting and buffering part is provided at the lower end of the buffer rod. An outward protruding structure is provided at the center of the lower end surface of the limiting and buffering part and can be accommodated in the limiting sleeve. The lower part of the limiting and buffering part connected to the outward protruding structure can be in limiting contact with the upper end surface of the limiting sleeve. A limiting groove is provided on the bottom side wall of the limiting sleeve.
[0006] The spark plug sleeve driving tool of the present utility model includes a buffer rod and a limit sleeve. The buffer rod can be a nylon rod with an integral structure, or a split structure in which only the lower limit buffer part is made of nylon and the limit buffer part is detachably and fixedly connected to the lower end of the buffer rod. The buffer rod and the limit sleeve are coaxial, and the limit buffer part of the buffer rod can be in contact with the upper end face of the limit sleeve. A limit groove is provided on the bottom side wall of the limit sleeve. When installing the spark plug sleeve on the engine, the limit sleeve is vertically placed on the bottom hole of the engine cylinder head, and the rectangular convex block on the bottom hole of the engine cylinder head is inserted into the limit groove of the limit sleeve. The two cooperate to make the perpendicularity between the limit sleeve and the bottom hole of the engine cylinder head 0.05 mm. The protruding structure at the lower end of the limit buffer part of the buffer rod is inserted into the upper inner hole of the spark plug sleeve. The outer wall of the protruding structure and the inner side wall of the spark plug sleeve are in a small clearance fit, and the clearance is 0.05 mm. The lower end of the spark plug sleeve connected to the buffer rod is vertically inserted into the upper end of the limit sleeve. The operator holds the limit sleeve to keep it upright, and another operator strikes the top of the buffer rod, so that the spark plug sleeve connected to the limit buffer part moves downward in the limit sleeve. When the limit buffer part of the buffer rod touches the upper end face of the limit sleeve, the contact end face diameter of the limit buffer part is larger than the inner diameter of the limit sleeve. Even if the buffer rod is struck continuously, the buffer rod will not move downward anymore. At this time, the installation of the spark plug sleeve is completed. The length of the limit sleeve can be selected according to the length of the spark plug sleeve, the depth of the bottom hole of the engine cylinder head, and the requirements of the driving depth of the spark plug sleeve, so as to ensure the accurate driving depth of the spark plug sleeve and ensure that the cylinder head and the sleeve are not damaged. Usually, the driving depth tolerance is ±0.3 mm.
[0007] Further, the buffer rod further includes a handle. The handle is a cylindrical structure. The lower end of the handle is fixedly connected to the limit buffer part. The protruding structure of the limit buffer part is a convex platform, and the convex platform can be accommodated in the limit sleeve, and the end face of the limit buffer part where the convex platform is located can be in limit contact with the upper end face of the limit sleeve.
[0008] The buffer rod further includes a handle provided at the upper end. The handle is a cylindrical structure. The lower end of the handle is fixedly connected to the limit buffer part. The protruding structure of the limit buffer part is a cylindrical convex platform, and the convex platform is inserted into the limit sleeve. Before driving the spark plug sleeve, this convex platform needs to be inserted into the upper inner hole of the spark plug sleeve. The outer wall of the convex platform and the inner side wall of the spark plug sleeve are in a small clearance fit, and the clearance is 0.05 mm. After the convex platform is completely inserted into the spark plug sleeve, the end face of the limit buffer part connected to the convex platform is in limit contact with the upper end face of the limit sleeve. The outer diameter of the end face of the limit buffer part in contact with the limit sleeve is larger than the inner diameter of the limit sleeve. Even if the buffer rod is struck again, the convex platform will not continue to move downward due to being limited, and the spark plug sleeve in contact with its bottom end face will not continue to move downward either, which can ensure the driving depth of the spark plug sleeve.
[0009] Further, the limiting sleeve is of a tubular structure, and the limiting groove of the limiting sleeve is a right-angle structure groove.
[0010] The limiting sleeve is of a tubular structure, and the limiting groove of the limiting sleeve is a right-angle structure groove. The right-angle structure groove is matched and inserted with a rectangular convex block reserved on the bottom hole of the engine cylinder head, ensuring that the perpendicularity between the limiting sleeve and the bottom hole of the engine cylinder head is 0.05. The outer wall of the boss and the inner wall of the spark plug sleeve are in a small clearance fit, with a clearance of 0.05 mm. Through these two fits, during the process of driving the spark plug sleeve into the bottom hole of the engine cylinder head, the coaxiality between the two is controlled within 0.1 mm, reducing the tangential force generated during the driving process and ensuring that no stress damage occurs to the spark plug sleeve and the bottom hole of the engine cylinder head during the driving process. The limiting sleeve can be processed into various specifications, and different lengths of limiting sleeves can be processed according to actual production requirements and selected for use according to the required driving depth, etc.
[0011] Further, the lower end of the handle is detachably and fixedly connected to the limiting and buffering part.
[0012] The lower end of the handle and the limiting and buffering part are detachably and fixedly connected. This is because although the handle of the buffer rod and the limiting and buffering part can be processed into an integral structure of a nylon rod, the limiting and buffering part made of nylon is very easy to damage during use and needs to be replaced. If made into an integral structure, the replacement cost is relatively high. Therefore, the two can be designed into a detachable structure, so that after the limiting and buffering part is damaged, only the limiting and buffering part needs to be replaced, saving costs and being simple and convenient.
[0013] Further, a cylindrical connecting part is provided at the center of the lower end surface of the handle, and a handle mounting hole is provided at the center of the upper end surface of the limiting and buffering part. The handle mounting hole is a vertical blind hole, and the cylindrical connecting part is detachably and fixedly connected to the handle mounting hole.
[0014] A coaxial cylindrical connecting part is provided at the center of the lower end surface of the handle, and a vertical handle mounting hole is provided at the center of the upper end surface of the limiting and buffering part. The cylindrical connecting part is detachably inserted and fixed into the handle mounting hole.
[0015] Further, a horizontally penetrating first pin hole is provided on the circumferential side wall of the cylindrical connecting part, and a horizontally penetrating second pin hole is provided on the circumferential side wall of the handle mounting hole. The second pin hole and the first pin hole can be matched and communicated.
[0016] A first pin hole is provided on the circumferential side wall of the cylindrical connecting part. The first pin hole is a horizontally arranged through hole. A horizontally penetrating hole, that is, the second pin hole, is provided at the middle position of the circumferential side wall of the handle mounting hole. The first pin hole and the second pin hole have the same diameter and can be matched and communicated to form a channel, and the handle and the limiting and buffering part are fixedly connected through a fixing pin.
[0017] Furthermore, the buffer rod also includes a fixing pin and a fixing rubber ring. The fixing pin is inserted and fixed in the connected first pin hole and the second pin hole. The lower end of the handle is detachably connected to the upper end of the limiting buffer part through the fixing pin. A horizontal annular groove is provided on the circumferential outer side wall of the limiting buffer part corresponding to the second pin hole, and the fixing rubber ring is matched and fastened to the annular groove.
[0018] The fixing pin of the buffer rod is inserted and fixed in the connected first pin hole and the second pin hole, and the handle and the limit buffer part are fixed together by the fixing pin. The annular groove is set on the circumferential side wall of the fixing pin installation position, and the fixing pin is completely fixed in the first pin hole and the second pin hole connected to form an integrated channel by fastening the fixing rubber ring on the annular groove. The handle and the limit buffer part of the buffer plate can also adopt other detachable connections, such as threaded connection, but the fixing pin connection is the best solution.
[0019] Furthermore, the material of the position limiting buffer portion is nylon material.
[0020] The limit buffer must be made of nylon material to play a buffering role. The spark plug sleeve is a thin-walled tube and cannot be hit directly with a hammer, which is easy to cause damage. If the limit buffer of the buffer rod is a non-detachable structure, the entire buffer rod can be made of nylon, but when the limit buffer is damaged, the buffer rod needs to be replaced as a whole, which is more expensive.
[0021] Furthermore, the outer diameter of the end surface where the limiting buffer portion contacts the limiting sleeve is larger than the inner diameter of the limiting sleeve.
[0022] The outer diameter of the end surface where the limiting buffer part contacts the limiting sleeve is larger than the inner diameter of the limiting sleeve. The limiting buffer part and the limiting sleeve cooperate to limit the position, thereby ensuring the driving depth of the spark plug sleeve.
[0023] Furthermore, the thickness of the fixing rubber ring is greater than the diameter of the fixing pin.
[0024] The thickness of the fixing rubber ring is greater than the diameter of the fixing pin, which can ensure that the fixing pin is elastically tightened and fixed by the fixing rubber ring sleeved on the annular groove after passing through the channel communicating the first pin hole and the second pin hole.
[0025] Compared with the prior art, the utility model has the following beneficial effects:
[0026] 1. The utility model matches the limiting groove of the limiting sleeve with the rectangular protrusion of the bottom hole of the engine cylinder head for insertion and positioning, ensuring that the verticality of the two is 0.05mm; the outer wall of the boss of the buffer rod and the inner wall of the spark plug sleeve are matched with a small gap of 0.05mm; these two matching positioning items ensure that the coaxiality of the sleeve with the bottom hole of the sleeve is maintained at about 0.1mm during the insertion process, reducing the shear force generated by the sleeve on the bottom hole of the cylinder head during the insertion process, and reducing the risk of damage to the bottom hole and the spark plug sleeve.
[0027] 2. The limit buffering part of the buffer rod of the utility model is detachably and fixedly connected to the handle, which is convenient for replacing the damaged limit buffering part made of nylon, and reduces the replacement cost.
[0028] 3. The utility model can select and replace limit sleeves with different lengths according to the installation needs to control the driving depth. Description of the Drawings
[0029] Figure 1 It is a schematic diagram of the overall working section when driving into the spark plug sleeve of the utility model;
[0030] Figure 2 It is a schematic diagram of the whole of the utility model;
[0031] Figure 3 It is a front view schematic diagram of the limit sleeve of the utility model;
[0032] Figure 4 It is a right view schematic diagram of the limit sleeve of the utility model;
[0033] Figure 5 It is a schematic diagram of the handle structure of the utility model;
[0034] Figure 6 It is a schematic diagram of the overall structure of the limit buffering part of the utility model;
[0035] Figure 7 It is a schematic diagram of the A-A section of the limit buffering part of the utility model.
[0036] In the figure:
[0037] 1. Buffer rod; 1.1. Limit buffering part; 1.11. Boss; 1.12. Handle mounting hole; 1.13. Second pin hole; 1.14. Annular groove; 1.2. Handle; 1.21. Cylindrical connecting part; 1.22. First pin hole; 1.3. Fixed pin; 1.4. Fixed rubber ring; 2. Limit sleeve; 2.1. Limit groove; 3. Bottom hole of engine cylinder head; 4. Spark plug sleeve. Detailed Embodiments
[0038] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following will further describe the utility model in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of them. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the utility model.
[0039] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. The singular forms "a", "the", and "said" used in this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. "Multiple" generally includes at least two.
[0040] It should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "inner", "outer", etc. in this utility model is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0041] In particular, it should be noted that the symbols and / or numbers in the specification that are not marked in the drawings are not drawing reference numerals.
[0042] For the embodiments provided by this utility model, that is, the embodiments of a spark plug sleeve driving tooling, the following will be described in detail in conjunction with Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 。
[0043] Embodiment 1:
[0044] As shown in Figure 2 , a spark plug sleeve driving tooling includes a buffer rod 1 and a limit sleeve 2. A limit buffer portion 1.1 is provided at the lower end of the buffer rod 1. An outward protruding structure is provided at the center of the lower end surface of the limit buffer portion 1.1 and can be accommodated in the limit sleeve 2. The lower part of the limit buffer portion 1.1 where the outward protruding structure is located can be in limit contact with the upper end surface of the limit sleeve 2. A limit groove 2.1 is provided on the bottom side wall of the limit sleeve 2.
[0045] The buffer rod 1 further includes a handle 1.2. As shown in Figure 3 , the handle 1.2 is a cylindrical structure. The lower end of the handle 1.2 is fixedly connected to the limit buffer portion 1.1. As shown in Figure 4 and Figure 5 , the outward protruding structure of the limit buffer portion 1.1 is a boss 1.11. The boss 1.11 can be accommodated in the limit sleeve 2, and the end surface of the limit buffer portion 1.1 where the boss 1.11 is located can be in limit contact with the upper end surface of the limit sleeve 2.
[0046] As shown in Figure 3 and Figure 4 , the limit sleeve 2 is a tubular structure, and the limit groove 2.1 of the limit sleeve 2 is a right-angle structure groove.
[0047] The material of the limit buffer part 1.1 is nylon material.
[0048] The outer diameter of the end face of the limit buffer part 1.1 in contact with the limit sleeve 2 is larger than the inner diameter of the limit sleeve 2.
[0049] In this embodiment, the limit buffer part 1.1 and the handle 1.2 of the buffer rod 1 are integrally formed nylon rods.
[0050] Embodiment 2:
[0051] See Figure 1 and Figure 2 As shown, a spark plug sleeve driving tooling includes a buffer rod 1 and a limit sleeve 2. A limit buffer part 1.1 is provided at the lower end of the buffer rod 1. An outward protruding structure is provided at the center of the lower end face of the limit buffer part 1.1 and can be accommodated in the limit sleeve 2. The lower part of the limit buffer part 1.1 where the outward protruding structure is located can be in limit contact with the upper end face of the limit sleeve 2. A limit groove 2.1 is provided on the bottom side wall of the limit sleeve 2.
[0052] The buffer rod 1 further includes a handle 1.2. The handle 1.2 is a cylindrical structure. The lower end of the handle 1.2 is fixedly connected to the limit buffer part 1.1. The outward protruding structure of the limit buffer part 1.1 is a boss 1.11. The boss 1.11 can be accommodated in the limit sleeve 2, and the end face of the limit buffer part 1.1 where the boss 1.11 is located can be in limit contact with the upper end face of the limit sleeve 2.
[0053] See Figure 3 and Figure 4 As shown, the limit sleeve 2 is a tubular structure, and the limit groove 2.1 of the limit sleeve 2 is a right-angle structure groove.
[0054] The lower end of the handle 1.2 is detachably and fixedly connected to the limit buffer part 1.1.
[0055] See Figure 5 As shown, a cylindrical connecting part 1.21 is provided at the center of the lower end face of the handle 1.2. See Figure 6 and Figure 7 As shown, a handle mounting hole 1.12 is provided at the center of the upper end face of the limit buffer part 1.1. The handle mounting hole 1.12 is a vertical blind hole. The cylindrical connecting part 1.21 is detachably and fixedly connected in the handle mounting hole 1.12.
[0056] A horizontally penetrating first pin hole 1.22 is provided on the circumferential side wall of the cylindrical connecting part 1.21. A horizontally penetrating second pin hole 1.13 is provided on the circumferential side wall of the handle mounting hole 1.12. The second pin hole 1.13 and the first pin hole 1.22 can be matched and communicated.
[0057] The buffer rod 1 further includes a fixing pin 1.3 and a fixing rubber ring 1.4. The fixing pin 1.3 is inserted and fixed in the communicated first pin hole 1.22 and second pin hole 1.13. The lower end of the handle 1.2 is detachably connected to the upper end of the limit buffer part 1.1 through the fixing pin 1.3. A horizontal annular groove 1.14 is provided on the circumferential outer side wall of the limit buffer part 1.1 corresponding to the second pin hole 1.13, and the fixing rubber ring 1.4 is tightly sleeved on the annular groove 1.14 in a matching manner.
[0058] The material of the limit buffer part 1.1 is nylon material.
[0059] The outer diameter of the end face of the limit buffer part 1.1 in contact with the limit sleeve 2 is greater than the inner diameter of the limit sleeve 2.
[0060] The thickness of the fixing rubber ring 1.4 is greater than the diameter of the fixing pin 1.3.
[0061] The handle 1.2 and the limit buffer part 1.1 of this embodiment are detachably and fixedly connected. The specific implementation method of driving and installing the spark plug sleeve is as follows:
[0062] 1. Insert the cylindrical connecting part 1.21 of the handle 1.2 into the handle mounting hole 1.12 of the limit buffer part 1.1 to communicate the first pin hole 1.22 and the second pin hole 1.13. Insert the fixing pin 1.3 into the first pin hole 1.22 and the second pin hole 1.13 for fixed connection, and sleeved and press the fixing rubber ring 1.4 on the annular groove 1.14 to completely enclose the fixing pin 1.3 in the first pin hole 1.22 and the second pin hole 1.13, completing the fixed installation of the handle 1.2 and the limit buffer part 1.1;
[0063] 2. Vertically place the limit sleeve 2 on the bottom hole 3 of the engine cylinder head, and the limit groove 2.1 at the bottom of the limit sleeve 2 is inserted and positioned with the rectangular convex block on the bottom hole 3 of the engine cylinder head;
[0064] 3. Insert the spark plug sleeve 4 into the upper inner hole of the limit sleeve 2;
[0065] 4. Insert the boss 1.11 of the limit buffer part 1.1 into the upper inner hole of the spark plug sleeve 4;
[0066] 5. Tap the top end of the handle 1.2, and the spark plug sleeve 4 moves downward along the inside of the limit sleeve 2 until the spark plug sleeve 4 completely enters the limit sleeve 2, and the lower end face of the limit buffer part 1.1 where the boss 1.11 is located is completely in contact and fitted with the upper end face of the limit sleeve 2, and the limit buffer part 1.1 can no longer move downward, completing the driving of the spark plug sleeve 4 to the specified depth.
[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A spark plug sleeve driving tool, characterized in that: The invention comprises a buffer rod (1) and a limiting sleeve (2), wherein a limiting buffer portion (1.1) is provided at the lower end of the buffer rod (1), an outer protruding structure is provided at the center of the lower end surface of the limiting buffer portion (1.1) and can be accommodated in the limiting sleeve (2), the lower part of the limiting buffer portion (1.1) where the outer protruding structure is located can be in limiting contact with the upper end surface of the limiting sleeve (2), and a limiting groove (2.1) is provided on the bottom side wall of the limiting sleeve (2).
2. The spark plug sleeve driving tool according to claim 1, characterized in that: The buffer rod (1) further comprises a handle (1.2), the handle (1.2) being a cylindrical structure, the lower end of the handle (1.2) being fixedly connected to the position-limiting buffer portion (1.1), the outer protruding structure of the position-limiting buffer portion (1.1) being a boss (1.11), the boss (1.11) being receivable in the position-limiting sleeve (2), and the end face of the position-limiting buffer portion (1.1) where the boss (1.11) is located being position-limitingly contacted with the upper end face of the position-limiting sleeve (2).
3. The spark plug sleeve driving tool according to claim 2, characterized in that: The limiting sleeve (2) is a tubular structure, and the limiting groove (2.1) of the limiting sleeve (2) is a right-angle structural groove.
4. The spark plug sleeve driving tool according to claim 3, characterized in that: The lower end of the handle (1.2) is detachably fixedly connected to the position limiting buffer portion (1.1).
5. The spark plug sleeve driving tool according to claim 4, characterized in that: A cylindrical connecting portion (1.21) is provided at the center of the lower end surface of the handle (1.2), and a handle mounting hole (1.12) is provided at the center of the upper end surface of the position limiting buffer portion (1.1). The handle mounting hole (1.12) is a vertical blind hole, and the cylindrical connecting portion (1.21) is detachably fixedly connected in the handle mounting hole (1.12).
6. The spark plug sleeve driving tool according to claim 5, characterized in that: A first pin hole (1.22) is provided on the circumferential side wall of the cylindrical connecting portion (1.21) and a second pin hole (1.13) is provided on the circumferential side wall of the handle mounting hole (1.12). The second pin hole (1.13) and the first pin hole (1.22) can be matched and connected.
7. The spark plug sleeve driving tool according to claim 6, characterized in that: The buffer rod (1) further comprises a fixing pin (1.3) and a fixing rubber ring (1.4); the fixing pin (1.3) is inserted and fixed in a first pin hole (1.22) and a second pin hole (1.13) which are connected to each other; the lower end of the handle (1.2) is detachably connected to the upper end of the position limiting buffer part (1.1) via the fixing pin (1.3); a horizontal annular groove (1.14) is provided on the circumferential outer side wall of the position limiting buffer part (1.1) corresponding to the second pin hole (1.13); and the fixing rubber ring (1.4) is matched and fastened to the annular groove (1.14).
8. The spark plug sleeve driving tool according to claim 7, characterized in that: The position limiting buffer part (1.1) is made of nylon material.
9. The spark plug sleeve driving tool according to claim 8, characterized in that: The outer diameter of the end surface of the position-limiting buffer portion (1.1) in contact with the position-limiting sleeve (2) is greater than the inner diameter of the position-limiting sleeve (2).
10. The spark plug sleeve driving tool according to claim 9, characterized in that: The thickness of the fixing rubber ring (1.4) is greater than the diameter of the fixing pin (1.3).