Automobile VVT drive valve machining inner wall polishing equipment

Abstract

The application discloses a kind of inner wall polishing equipment for automobile VVT drive valve machining, and the application relates to the technical field of automobile drive valve machining, including bottom plate frame, long lead screw is rotatably installed on the bottom plate frame, and the long lead screw is hollow;Transmission mechanism is used to drive long lead screw to do telescopic rotation on the bottom plate frame in front-back direction, and the transmission mechanism has a polishing motor for providing driving force.The inner wall polishing equipment for automobile VVT drive valve machining is simple in structure, easy to operate, high in polishing precision, can meet the processing needs of different cavity diameter changes of standard automobile VVT drive valve, and can polish and process the inner wall in effective axial length range with uniform precision in unit time, with high efficiency and high consistency, to ensure the quality consistency of each valve in mass production.

Description

Technical Field

[0001] This invention relates to the field of automotive drive valve processing technology, specifically to an inner wall grinding device for processing automotive VVT ​​drive valves. Background Technology

[0002] With the rapid development of the automotive industry, continuous advancements in engine technology have become crucial for improving vehicle performance and fuel economy. Variable valve timing (VVT) technology, as a key component, achieves higher combustion efficiency and power output by adjusting the opening and closing times of valves. The VVT-driven valve is one of the core components for realizing this technology, and its precision and quality directly affect engine performance and lifespan. In the production process of VVT-driven valves, the machining quality of the inner wall is a critical factor in ensuring valve performance. The precision of the inner wall machining directly affects the valve's sealing and the smoothness of the airflow channel, thus impacting engine efficiency. Currently, traditional machining methods, such as turning and milling, are mostly used for machining the inner wall of VVT-driven valves. However, these methods struggle to guarantee the smoothness and precision of the inner wall and are inefficient. To improve the machining quality of the inner wall of VVT-driven valves, inner wall grinding technology has been adopted in recent years. However, existing inner wall grinding equipment often suffers from complex structures, cumbersome operation, and insufficient grinding precision, making it difficult to meet high-standard processing requirements. Furthermore, traditional manual grinding methods are not only inefficient but also inconsistent, failing to guarantee the quality consistency of each valve in mass production. Summary of the Invention

[0003] To solve the above technical problems, the present invention is achieved through the following technical solution: an inner wall grinding device for processing automotive VVT ​​drive valves, including a base plate frame, on which a long lead screw is rotatably mounted, and the long lead screw is hollow; A transmission mechanism is used to drive a long lead screw to rotate in the front-to-back direction on the base plate frame. The transmission mechanism has a grinding motor that provides driving force and a pump installed on the left side of the transmission mechanism. The pump and the transmission mechanism are respectively installed on both sides of the long lead screw. The transmission mechanism is rotatably mounted to the base plate frame through the grinding motor. The grinding motor is mounted on the top of the base plate frame and on the side close to the transmission mechanism. The pump is installed on the left end of the base plate frame. A grinding component for grinding the inner wall of a VVT drive valve in an automobile. The grinding component has a long sleeve for guiding dust and a support column installed below the grinding component. The long sleeve is fixedly connected to the support column and is connected to a pump. The long lead screw is fixedly connected to a long sleeve rod at the end away from the grinding motor. A coarse sleeve rod is fitted onto the surface of the long sleeve rod at the end away from the grinding motor. A short pipe head is connected to the surface of the coarse sleeve rod at the end away from the grinding motor. The short pipe head communicates with the inner cavity of the long sleeve rod. A grinding body is installed on the surface of the coarse sleeve rod at the end away from the grinding motor. The grinding body is used to extend and grind the inner wall of the automotive VVT ​​drive valve.

[0004] Preferably, a straight rod is installed in the inner cavity of the long sleeve rod, a short head rod is installed at the end of the straight rod away from the grinding motor, a connector rod is threaded to the end of the short head rod away from the straight rod, a locking rod is inserted inside the connector rod, a toothed window is opened through the surface of the long sleeve rod and the toothed window is connected to the inner cavity of the long sleeve rod, and a sleeve cavity is left between the long sleeve rod and the thick sleeve rod.

[0005] Preferably, the end of the short tube head away from the coarse sleeve is connected to a corrugated rubber tube, a first spring is installed around the corrugated rubber tube, one end of the first spring is connected to the short tube head, and the other end of the first spring is connected to a bucket. The bucket is spring-loaded to the short tube head by the first spring. The grinding body is generally flat and round, and a bending part is installed in the middle of the surface of the grinding body. The bending part can be bent and deformed. A second spring is connected in the middle of the interior of the grinding body. The second spring is used to spring back the deformed bending part to its initial state.

[0006] Preferably, a connecting rod is connected between the straight rod and the short head rod. The connecting rod is slidably installed with the bucket component through a short tube head, a corrugated rubber tube, and a first spring. A column is fixedly connected to the surface of the straight rod and the end away from the connecting rod. A gear head is installed in the middle of the top of the column and is elastically connected to the column. The gear head meshes with the long sleeve rod through a toothed window.

[0007] Preferably, the end of the straight rod away from the connecting rod is connected to a third spring, and the end of the third spring away from the straight rod is connected to the inner wall of the long sleeve rod. The straight rod is spring-loaded to the long sleeve rod by the third spring.

[0008] Preferably, a fourth spring is connected to the middle of the inner side of the connector rod and the end near the short head rod. Two pairs of springs are installed in a centrally symmetrical manner inside the connector rod, and the springs are installed to spring and extend on the surface of the connector rod.

[0009] Preferably, a pair of locking teeth are fixedly installed at one end of the locking rod near the fourth spring, with a notch between the locking teeth. The spring is locked to the locking rod through the locking teeth, and the notch corresponds to and cooperates with the spring. The locking rod is installed with the connector rod pin through the cooperation of the locking teeth, the spring, and the fourth spring. The connector rod is installed with the grinding body pin through the cooperation of the spring and the locking rod.

[0010] Preferably, the transmission mechanism includes a turntable rotatably mounted on the top of the base plate frame. A pair of arms are centrally symmetrically mounted on the side of the turntable away from the grinding motor. A kit is mounted on the end of each arm near the long lead screw. The kit is threadedly installed on the long lead screw, and the arms and kit are rotatably mounted.

[0011] Preferably, a collar is fitted inside the long sleeve, the long sleeve is slidably installed with the long sleeve rod through the collar, the long sleeve is slidably installed with the thick sleeve rod through the collar, and a guide cavity is formed around the inner side of the long sleeve, and the guide cavity is connected to the pump through the long sleeve.

[0012] Preferably, the grinding component includes a pair of grinding discs, which are fitted onto the coarse sleeve rod at one end away from the long sleeve rod. Symmetrical hoop members are installed on both sides of the grinding discs. The hoop members are bolted to the grinding discs and to the coarse sleeve rod. Air holes are formed on the surface of the grinding discs, and a through hole is formed inside the grinding discs, penetrating the coarse sleeve rod. The air holes communicate with the sleeve cavity through the through hole.

[0013] This invention provides an inner wall grinding device for processing automotive VVT ​​drive valves, which has the following beneficial effects: I. This internal wall grinding equipment for automotive VVT ​​drive valves can adaptably grind the internal walls of various automotive VVT ​​drive valves with different inner diameters. Furthermore, by pre-releasing a longer connecting rod, it can extend the effective movement distance of the grinding body away from the short pipe head. This adapts to situations where the inner diameter of individual automotive VVT ​​drive valves expands locally, enabling adaptive grinding of such special variable-diameter cavities. This expands the operating conditions of the grinding equipment, increases the types of automotive VVT ​​drive valves it can handle, and enhances its practicality.

[0014] II. This internal wall grinding equipment for automotive VVT ​​drive valves, through the circumferential arrangement of the bent part in the middle of the grinding body surface, facilitates the local deformation of the grinding body under centrifugal force. This allows the grinding body to adaptively deform and fit against the inner wall of the automotive VVT ​​drive valve under centrifugal force, achieving close contact and grinding of the inner wall of the automotive VVT ​​drive valve. Furthermore, it increases the grinding body's flexibility in adapting to special automotive VVT ​​drive valves with localized cavity diameter variations, avoiding direct hard scratches and damage to the inner wall of the automotive VVT ​​drive valve. This achieves flexible grinding of the inner wall of the automotive VVT ​​drive valve, ensuring the grinding precision and quality of the inner wall.

[0015] Third, this internal wall grinding equipment for automotive VVT ​​drive valves uses a long lead screw to drive the grinding body to extend and rotate inside the automotive VVT ​​drive valve. It can not only grind the inner wall of the automotive VVT ​​drive valve, but also perform reciprocating grinding within a specified length along the axis of the long lead screw. This ensures that the grinding precision of each part of the inner wall of the automotive VVT ​​drive valve is consistent and uniform, eliminates the hidden danger of large local grinding precision deviations, and guarantees the quality of the grinding operation of the inner wall of the automotive VVT ​​drive valve.

[0016] IV. This internal wall grinding equipment for processing automotive VVT ​​drive valves utilizes the reciprocating motion path length of the grinding parts and grinding body within the automotive VVT ​​drive valve. The grinding motor can control the circumference of the clockwise and counterclockwise rotation of the turntable on the base plate, thereby controlling the effective grinding path length of the grinding equipment on the axial direction of the automotive VVT ​​drive valve's internal wall. This changes the traditional single-direction extended grinding, eliminates the inconsistency of grinding accuracy, avoids grinding errors, and eliminates the defects of inconsistent grinding accuracy.

[0017] V. This internal wall grinding equipment for automotive VVT ​​drive valves, through the design of the connecting rod, can transform the connection structure between the straight rod and the short-head rod into this flexible beaded structure. This allows for precise adjustment of the distance between the grinding body and the coarse sleeve rod by using a small bead forming the connecting rod as a unit of extension or retraction. This enables precise control of the contact grinding accuracy of the grinding body on the inner wall of the automotive VVT ​​drive valve.

[0018] VI. This internal wall grinding equipment for automotive VVT ​​drive valve processing, regardless of whether the grinding discs directly participate in the grinding operation of the automotive VVT ​​drive valve's internal wall, can utilize the installation of these two grinding discs inside the automotive VVT ​​drive valve as an effective shielding and protective structure to prevent dust from continuing to spread and contaminate other parts of the internal wall. It can effectively prevent the long-distance diffusion of dust generated during grinding and reduce the degree of dust contamination of the automotive VVT ​​drive valve's internal cavity.

[0019] VII. The inner wall grinding equipment for processing automotive VVT ​​drive valves has a simple structure, is easy to operate, and has high grinding precision. It can meet the processing requirements of standard automotive VVT ​​drive valves with different cavity diameters. It can perform uniform precision grinding on the inner wall within the effective axial length range per unit time, which is highly efficient and consistent, and can ensure the quality consistency of each valve in mass production. Attached Figure Description

[0020] Figure 1This is a front structural diagram of an inner wall grinding device for processing automotive VVT ​​drive valves according to the present invention. Figure 2 This is a schematic diagram of the back structure of an inner wall grinding device for processing automotive VVT ​​drive valves according to the present invention; Figure 3 This is a schematic diagram of a partial assembly structure of the grinding part and the coarse sleeve rod of the present invention; Figure 4 This is a schematic diagram of a partial assembly structure of the grinding disc and the coarse sleeve rod of the present invention; Figure 5 This is a schematic diagram of a partial assembly structure of the coarse sleeve and the short tube head of the present invention; Figure 6 This is a schematic diagram of the internal structure of the long sleeve rod of the present invention; Figure 7 This is a schematic diagram of a partial assembly structure of the straight rod and the joint rod of the present invention; Figure 8 This is a schematic diagram of a partial assembly structure of the straight rod and the long sleeve rod of the present invention; Figure 9 This is a schematic diagram of a partial assembly structure of the connector rod and the grinding body of the present invention; Figure 10 This is a schematic diagram of a partial assembly structure of the locking rod and the connector rod of the present invention; Figure 11 This is a schematic diagram of the locking rod of the present invention; Figure 12 This is a schematic diagram of the assembly structure of the grinding disc and the hoop of the present invention; Figure 13 This is a schematic diagram of the assembly structure of the long sleeve and the thick sleeve rod of the present invention.

[0021] In the diagram: 1. Base plate frame; 2. Long lead screw; 3. Transmission mechanism; 4. Grinding motor; 5. Pump; 6. Long sleeve; 7. Grinding component; 8. Support column; 21. Long sleeve rod; 23. Coarse sleeve rod; 24. Short tube end; 25. Grinding body; 26. Straight rod; 27. Short end rod; 28. Connector rod; 29. ​​Locking rod; 211. Toothed window; 212. Sleeve cavity; 241. Corrugated rubber tube; 242. First spring; 2 43. Bucket component; 251. Bending section; 252. Second spring; 261. Connecting rod; 262. Column; 263. Gear head; 264. Third spring; 281. Fourth spring; 282. Spring tongue; 291. Clamping tooth; 292. Notch; 31. Turntable; 32. Arm; 33. Kit; 61. Collar; 62. Guide cavity; 71. Grinding disc; 72. Hoop; 73. Air hole; 74. Perforation. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0023] First embodiment, such as Figures 1 to 13 As shown, the present invention provides a technical solution: an inner wall grinding device for processing automotive VVT ​​drive valves, including a base plate frame 1, on which a long lead screw 2 is rotatably mounted, and the long lead screw 2 is hollow; The transmission mechanism 3 is used to drive the long lead screw 2 to rotate in the front-to-back direction on the base plate frame 1. The transmission mechanism 3 has a grinding motor 4 that provides driving force, and a pump 5 installed on the left side of the transmission mechanism 3. The pump 5 and the transmission mechanism 3 are respectively installed on both sides of the long lead screw 2. The transmission mechanism 3 is rotatably installed on the base plate frame 1 through the grinding motor 4. The grinding motor 4 is mounted on the top of the base plate frame 1 and on the side close to the transmission mechanism 3. The pump 5 is installed on the left end of the base plate frame 1. The grinding component 7 is used to grind the inner wall of the VVT ​​drive valve of an automobile. The grinding component 7 has a long sleeve 6 for guiding dust and a support column 8 installed below the grinding component 7. The long sleeve 6 is fixedly connected to the support column 8 and is connected to the pump 5. Among them, the end of the long lead screw 2 away from the grinding motor 4 is fixedly connected to a long sleeve rod 21. The end of the long sleeve rod 21 away from the grinding motor 4 is fitted with a coarse sleeve rod 23. The end of the coarse sleeve rod 23 away from the grinding motor 4 is connected to a short tube head 24. The short tube head 24 is connected to the inner cavity of the long sleeve rod 21. The end of the coarse sleeve rod 23 away from the grinding motor 4 is equipped with a grinding body 25. The grinding body 25 is used to extend and grind the inner wall of the automotive VVT ​​drive valve.

[0024] A straight rod 26 is installed in the inner cavity of the long sleeve rod 21. A short rod 27 is installed at the end of the straight rod 26 away from the grinding motor 4. A connector rod 28 is threaded to the end of the short rod 27 away from the straight rod 26. A locking rod 29 is inserted inside the connector rod 28. A toothed window 211 is opened through the surface of the long sleeve rod 21, and the toothed window 211 is connected to the inner cavity of the long sleeve rod 21. A sleeve cavity 212 is left between the long sleeve rod 21 and the coarse sleeve rod 23.

[0025] A corrugated rubber tube 241 is connected to the end of the short tube head 24 away from the coarse sleeve rod 23. A first spring 242 is installed around the corrugated rubber tube 241, and one end of the first spring 242 is connected to the short tube head 24. The other end of the first spring 242 is connected to the bucket 243. The bucket 243 is spring-loaded to the short tube head 24 through the first spring 242. The grinding body 25 is generally flat and round, and a bending part 251 is installed in the middle of the surface of the grinding body 25. The bending part 251 can be bent and deformed. A second spring 252 is connected in the middle of the interior of the grinding body 25. The second spring 252 is used to spring back the deformed bending part 251 to the initial state.

[0026] The end of the straight rod 26 away from the connecting rod 261 is connected to a third spring 264, and the end of the third spring 264 away from the straight rod 26 is connected to the inner wall of the long sleeve rod 21. The straight rod 26 is spring-loaded to the long sleeve rod 21 through the third spring 264.

[0027] A fourth spring 281 is connected to the middle of the inner side of the connector rod 28 and the end near the short head rod 27. Two pairs of spring tongues 282 are installed in a centrally symmetrical manner inside the connector rod 28, and the spring tongues 282 are installed in a spring-like extension and retraction position on the surface of the connector rod 28.

[0028] A pair of locking teeth 291 are fixedly installed at one end of the locking rod 29 near the fourth spring 281. A notch 292 is left between the locking teeth 291. The spring tongue 282 is locked to the locking rod 29 through the locking teeth 291. The notch 292 and the spring tongue 282 are correspondingly engaged. The locking rod 29 is engaged with the connector rod 28 pin through the engagement of the locking teeth 291, the spring tongue 282 and the fourth spring 281. The connector rod 28 is engaged with the grinding body 25 pin through the engagement of the spring tongue 282 and the locking rod 29.

[0029] The transmission mechanism 3 includes a turntable 31 rotatably mounted on the top of the base plate frame 1. A pair of arms 32 are centrally symmetrically mounted on the side of the turntable 31 away from the grinding motor 4. A kit 33 is mounted on the end of the arm 32 near the long lead screw 2. The kit 33 is threadedly mounted to the long lead screw 2. The arm 32 and the kit 33 are rotatably mounted.

[0030] The grinding component 7 includes a pair of grinding discs 71, which are fitted onto the coarse sleeve rod 23 at one end away from the long sleeve rod 21. Symmetrical hoop members 72 are installed on both sides of the grinding discs 71. The hoop members 72 are bolted to the grinding discs 71 and to the coarse sleeve rod 23. Air holes 73 are provided on the surface of the grinding discs 71. A through hole 74 is provided inside the grinding discs 71, penetrating the coarse sleeve rod 23. The air holes 73 are connected to the sleeve cavity 212 through the through hole 74.

[0031] In use, the grinding part 7 is inserted into the VVT ​​drive valve of the car. Then, the grinding motor 4 and the pump 5 are activated at the same time. The grinding motor 4 drives the transmission mechanism 3 to rotate around the output end of the grinding motor 4, so that the turntable 31 makes a reciprocating rotational motion on the base plate frame 1, switching between clockwise and counterclockwise. With the help of the screw thread of the arm 32 and the sleeve 33, the long screw 2 can be guided by the dual axial direction of the base plate frame 1 and the long sleeve 6 at the top of the support column 8 to make a telescopic rotational motion along the axial direction of the long screw 2, so as to drive the grinding body 25 to fit against the inner wall of the drive valve and grind while rotating.

[0032] During the polishing process, the polishing parts 7 and 25 can be used and stored in accordance with the specific size of the inner diameter of the automotive VVT ​​drive valve. When the inner diameter of the VVT ​​drive valve of the car is the same as the outer diameter of the grinding disc 71, the grinding body 25 that is locked on the joint rod 28 can be removed by pulling the locking rod 29 out of the joint rod 28. Then, the locking rod 29 is reinserted into the joint rod 28, and the spring tongue 282 pushed out of the surface of the joint rod 28 by the locking rod 29 acts as a blocking structure for the limit blocking link rod 261 to fully retract into the bucket part 243. Then, the gear head 263 is lifted, and the finger is used to pull the column 262 along the direction of the straight rod 26 to retract the straight rod towards the direction of the long screw 2. 26. Then, the gear head 263 is engaged in the tooth window 211 and re-engaged with the long sleeve rod 21, thereby pulling back the connecting rod 261. During the process of the straight rod 26 pulling the connecting rod 261 back into the long sleeve rod 21, the bucket 243 can be used to compress the first spring 242, and the bucket 243 is stored between the two grinding discs 71. The two grinding discs 71 are the only structural components on the surface of the coarse sleeve rod 23 that are in contact with and polish the inner wall of the automotive VVT ​​drive valve at this moment, so as to achieve targeted polishing of the inner wall of the automotive VVT ​​drive valve of this size.

[0033] When the inner diameter of the automotive VVT ​​drive valve is larger than the outer diameter of the grinding disc 71, it can be used as described above: insert the grinding piece 7 together with the grinding body 25 into the automotive VVT ​​drive valve, then rotate the grinding body 25 around the long sleeve rod 21 until the axis of the grinding body 25 is perpendicular to the plane of the working platform, then release the connecting rod 261 until the side of the grinding body 25 away from the short tube head 24 contacts the inner wall, then re-engage the gear head 263 and install it in the tooth window 211 to position and lock the length of the extended connecting rod 261. Then, under the rotation of the long screw 2, the inner wall of the automotive VVT ​​drive valve can be polished by the grinding body 25.

[0034] When the inner diameter of the automotive VVT ​​drive valve is smaller than the outer diameter of the grinding disc 71 but larger than the outer diameter of the coarse sleeve 23, the inner wall of the automotive VVT ​​drive valve can be fitted and ground by removing the grinding disc 71 and replacing it with a grinding disc 71 of the corresponding diameter.

[0035] Through the above operations, it is possible to achieve adaptive grinding of the inner walls of various automotive VVT ​​drive valves with different inner diameters. Furthermore, by pre-releasing the connecting rod 261 by an additional distance, the effective movement distance of the grinding body 25 away from the short pipe head 24 can be extended. This is to adapt to the working condition where the inner diameter of individual automotive VVT ​​drive valves is locally enlarged. It can adaptively grind such special variable diameter inner cavities, expand the operating conditions of the grinding equipment, increase the types of automotive VVT ​​drive valves that the grinding equipment can handle, and improve the practicality of the grinding equipment.

[0036] By having the bend 251 arranged around the center of the surface of the grinding body 25, it is possible to facilitate the local deformation of the grinding body 25 under the action of centrifugal force. This allows the grinding body 25 to adaptively deform and fit against the inner wall of the automotive VVT ​​drive valve under the action of centrifugal force, thereby achieving close contact and grinding of the inner wall of the automotive VVT ​​drive valve. It also increases the flexibility of the grinding body 25 to special automotive VVT ​​drive valves with local cavity diameter changes, without directly causing hard scratches or damage to the inner wall of the automotive VVT ​​drive valve. This achieves flexible grinding operation of the inner wall of the automotive VVT ​​drive valve, ensuring the grinding accuracy and quality of the inner wall of the automotive VVT ​​drive valve.

[0037] The long lead screw 2 drives the grinding body 25 to extend and rotate inside the automotive VVT ​​drive valve. This allows for grinding of the inner wall of the automotive VVT ​​drive valve, as well as reciprocating grinding along the axis of the long lead screw 2 within a specified length. This ensures that the grinding precision of each part of the inner wall of the automotive VVT ​​drive valve remains consistent and uniform, eliminating the potential for large local grinding precision deviations and guaranteeing the quality of the grinding operation on the inner wall of the automotive VVT ​​drive valve.

[0038] Specifically, by utilizing the reciprocating motion path length of the grinding component 7 and the grinding body 25 within the automotive VVT ​​drive valve, the circumference of the clockwise and counterclockwise rotation of the turntable 31 on the base plate 1 can be controlled by the grinding motor 4. This allows for control of the effective grinding path length of the grinding equipment on the inner wall of the automotive VVT ​​drive valve along the axis, changing the traditional single-direction extended grinding, eliminating inconsistencies in grinding precision, avoiding grinding errors, eliminating defects in inconsistent grinding precision, and improving surface finish.

[0039] As can be seen from the above operations, the grinding equipment has a simple structure, is easy to operate, and has high grinding precision. It can meet the processing requirements of standard automotive VVT ​​drive valves with different cavity diameters. It can also perform uniform precision grinding on the inner wall within the effective axial length range per unit time, which is highly efficient and consistent, and can ensure the quality consistency of each valve in mass production.

[0040] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figure 6 and Figure 7 As shown, a connecting rod 261 connects the straight rod 26 and the short rod 27. The connecting rod 261 is slidably installed with the bucket 243 through the cooperation of the short tube head 24, the corrugated rubber tube 241 and the first spring 242. A column 262 is fixedly connected to the surface of the straight rod 26 away from the connecting rod 261. A gear head 263 is installed in the middle of the top of the column 262 and is elastically connected to the column 262. The gear head 263 meshes with the long sleeve rod 21 through the tooth window 211.

[0041] By designing the connecting rod 261, the connection structure between the straight rod 26 and the short rod 27 can be transformed into this flexible beaded structure. This allows for precise adjustment of the distance between the grinding body 25 and the coarse rod 23 during subsequent actions such as lifting and pressing to change the specific position of the gear head 263 within the tooth window 211 on the surface of the long sleeve rod 21. Each small bead constituting the connecting rod 261 can be used as a unit for extension or retraction. This enables precise control of the contact grinding accuracy of the grinding body 25 on the inner wall of the automotive VVT ​​drive valve.

[0042] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figure 13 As shown, a collar 61 is fitted inside the long sleeve 6. The long sleeve 6 is slidably installed with the long sleeve rod 21 through the collar 61. The long sleeve 6 is slidably installed with the thick sleeve rod 23 through the collar 61. A guide cavity 62 is opened around the inside of the long sleeve 6, and the guide cavity 62 is connected to the pump 5 through the long sleeve 6.

[0043] During the grinding process, regardless of whether the grinding discs 71 directly participate in the grinding of the inner wall of the automotive VVT ​​drive valve, the installation of these two grinding discs 71 inside the automotive VVT ​​drive valve can serve as an effective shielding and protective structure to prevent dust from continuing to spread and contaminate other parts of the inner wall. This can effectively prevent the long-distance diffusion of dust generated during grinding and reduce the degree of dust contamination of the inner cavity of the automotive VVT ​​drive valve.

[0044] Simultaneously, with the activation of the pump 5, the dust generated can be promptly adsorbed and collected into the sleeve cavity 212 through the connection between the air holes 73 and perforations 74 on the surface of the grinding disc 71 and the sleeve cavity 212. Under the continuous push of suction, the dust is finally collected into the dust storage container of the pump 5 through the guide cavity 62 inside the collar 61. This enables the grinding equipment to simultaneously grind the inner wall of the automotive VVT ​​drive valve and collect dust in real time, eliminating the need for subsequent separate cleaning of the inner cavity of the automotive VVT ​​drive valve, saving processing time for the automotive VVT ​​drive valve and improving grinding efficiency.

[0045] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An inner wall grinding device for processing automotive VVT ​​drive valves, comprising a base plate frame (1), characterized in that: A long screw (2) is rotatably mounted on the base plate frame (1), and the long screw (2) is hollow; The transmission mechanism (3) is used to drive the long screw (2) to rotate in the front-to-back direction on the base plate frame (1). The transmission mechanism (3) has a grinding motor (4) that provides driving force and a pump (5) installed on the left side of the transmission mechanism (3). The pump (5) and the transmission mechanism (3) are respectively installed on both sides of the long screw (2). The transmission mechanism (3) is rotatably installed on the base plate frame (1) through the grinding motor (4). The grinding motor (4) is mounted on the top of the base plate frame (1) and on the side close to the transmission mechanism (3). The pump (5) is installed on the left end of the base plate frame (1). A grinding component (7) is used to grind the inner wall of the VVT ​​drive valve of an automobile. The grinding component (7) has a long sleeve (6) for guiding dust and a support (8) installed below the grinding component (7). The long sleeve (6) is fixedly connected to the support (8) and the long sleeve (6) is connected to the pump (5). Among them, the long screw (2) is fixedly connected to a long sleeve rod (21) at one end away from the grinding motor (4), and a coarse sleeve rod (23) is fitted on the surface of the long sleeve rod (21) and at one end away from the grinding motor (4). A short tube head (24) is connected to the surface of the coarse sleeve rod (23) and at one end away from the grinding motor (4). The short tube head (24) is connected to the inner cavity of the long sleeve rod (21). A grinding body (25) is installed on the surface of the coarse sleeve rod (23) and at one end away from the grinding motor (4). The grinding body (25) is used to extend and grind the inner wall of the automotive VVT ​​drive valve. A straight rod (26) is installed in the inner cavity of the long sleeve rod (21). A short rod (27) is installed at the end of the straight rod (26) away from the grinding motor (4). A connector rod (28) is threaded to the end of the short rod (27) away from the straight rod (26). A locking rod (29) is inserted inside the connector rod (28). A toothed window (211) is opened through the surface of the long sleeve rod (21), and the toothed window (211) is connected to the inner cavity of the long sleeve rod (21). A sleeve cavity (212) is left between the long sleeve rod (21) and the thick sleeve rod (23). The short tube head (24) is connected to a corrugated rubber tube (241) at one end away from the thick sleeve rod (23). A first spring (242) is installed around the corrugated rubber tube (241), and one end of the first spring (242) is connected to the short tube head (24). The other end of the first spring (242) is connected to a bucket (243). The bucket (243) is spring-loaded to the short tube head (24) by the first spring (242). The grinding body (25) is generally flat and round, and a bent part (251) is installed in the middle of the surface of the grinding body (25). A second spring (252) is connected in the middle of the interior of the grinding body (25). A connecting rod (261) connects the straight rod (26) and the short head rod (27). The connecting rod (261) is slidably installed with the bucket (243) through a short tube head (24), a corrugated rubber tube (241) and a first spring (242). A column (262) is fixedly connected to the surface of the straight rod (26) and the end away from the connecting rod (261). A gear head (263) is installed in the middle of the top of the column (262), and the gear head (263) is elastically connected to the column (262). The gear head (263) meshes with the long sleeve rod (21) through a tooth window (211). The end of the straight rod (26) away from the connecting rod (261) is connected to a third spring (264), and the end of the third spring (264) away from the straight rod (26) is connected to the inner wall of the long sleeve rod (21). The straight rod (26) is spring-loaded to the long sleeve rod (21) by the third spring (264).

2. The inner wall grinding equipment for processing automotive VVT ​​drive valves according to claim 1, characterized in that: A fourth spring (281) is connected to the middle of the inner side of the connector rod (28) and one end near the short head rod (27). Two pairs of spring tongues (282) are installed in a centrally symmetrical manner inside the connector rod (28), and the spring tongues (282) are spring-loaded and extend and retract on the surface of the connector rod (28).

3. The inner wall grinding equipment for processing automotive VVT ​​drive valves according to claim 2, characterized in that: A pair of locking teeth (291) are fixedly installed at one end of the locking rod (29) near the fourth spring (281). A notch (292) is left between the locking teeth (291). The spring tongue (282) is locked to the locking rod (29) through the locking teeth (291). The notch (292) and the spring tongue (282) are correspondingly engaged. The locking rod (29) is engaged with the connector rod (28) pin through the engagement of the locking teeth (291), the spring tongue (282) and the fourth spring (281). The connector rod (28) is engaged with the grinding body (25) pin through the engagement of the spring tongue (282) and the locking rod (29).

4. The inner wall grinding equipment for processing automotive VVT ​​drive valves according to claim 3, characterized in that: The transmission mechanism (3) includes a turntable (31) rotatably mounted on the top of the base plate frame (1). A pair of arms (32) are centrally symmetrically mounted on the side of the turntable (31) away from the grinding motor (4). A kit (33) is mounted on one end of the arm (32) near the long lead screw (2). The kit (33) is threadedly mounted to the long lead screw (2). The arm (32) and the kit (33) are rotatably mounted.

5. The inner wall grinding equipment for processing automotive VVT ​​drive valves according to claim 4, characterized in that: A collar (61) is fitted inside the long sleeve (6). The long sleeve (6) is slidably installed with the long sleeve rod (21) through the collar (61). The long sleeve (6) is slidably installed with the thick sleeve rod (23) through the collar (61). A guide cavity (62) is opened around the inside of the long sleeve (6), and the guide cavity (62) is connected to the pump (5) through the long sleeve (6).

6. The inner wall grinding equipment for processing automotive VVT ​​drive valves according to claim 5, characterized in that: The grinding component (7) includes a pair of grinding discs (71). The pair of grinding discs (71) are fitted on the coarse sleeve rod (23) and at one end away from the long sleeve rod (21). The grinding discs (71) are symmetrically equipped with hoop members (72) on both sides. The hoop members (72) are bolted to the grinding discs (71) and the coarse sleeve rod (23). The grinding discs (71) have air holes (73) on their surface. The grinding discs (71) have through holes (74) that penetrate the coarse sleeve rod (23). The air holes (73) are connected to the sleeve cavity (212) through the through holes (74).

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