Motorcycle engine air cylinder end face hole machining device

Abstract

The invention discloses a motorcycle engine air cylinder end face hole machining device, and relates to the technical field of motorcycle engine machining. The device comprises a rack, a transmission shaft, a main body column, an inner supporting rod, an outer claw rod, a transmission disc, a driving gear disc, a drill bit and an intelligent monitoring element; the main body column is connected with the transmission shaft, the inner supporting rod and the outer claw rod are respectively installed in an installation groove of the main body column in a sliding mode, reverse sliding is achieved through matching of the transmission disc and the plane thread pair, and bidirectional centering clamping is formed on a cylinder body. The outer claw rods are connected with the studs and the drill bits through the threaded sleeves, the multiple drill bits are distributed in an annular array mode, and synchronous rotation is achieved through meshing of the driving gear disc and the gear rod. The intelligent monitoring element monitors the motion state of the transmission shaft, automatically triggers the generator to start drilling after clamping is in place, and automatically stops after drilling is completed. The device is accurate in centering and clamping, high in automation degree, high in machining efficiency and capable of effectively protecting equipment and workpieces and improving the machining precision and the product percent of pass.

Description

Technical Field

[0001] This invention relates to the field of motorcycle engine processing and manufacturing technology, specifically to a machining device for machining holes on the cylinder end of a motorcycle engine. Background Technology

[0002] The engine block of a motorcycle is one of the core components of the engine, commonly known as the cylinder. Figures 1-4 As shown, the end face typically requires machining multiple mounting holes or screw holes arranged in a ring array. The machining positional accuracy of these end face holes 102 directly affects the engine's assembly accuracy, sealing performance, and operational stability. Currently, the machining of the end face holes 102 of motorcycle engine cylinder blocks mostly employs traditional chucks and other tooling fixtures for positioning and clamping, followed by drilling sequentially with a single drill bit. This method is not only inefficient but also makes it difficult to guarantee the relative positional relationship between these holes, thus affecting subsequent assembly and use. Alternatively, a multi-drill mechanism can be used for simultaneous drilling. Specifically, traditional processing methods have many drawbacks: First, the positioning and clamping mechanism is poorly designed, often using a single-direction clamping method, directly clamping the cylinder neck 101 of the cylinder block 1 (cylinder body) with a three-jaw chuck. Because relying on the traditional three-jaw chuck for clamping, it is impossible to clamp as... Figures 1-4 The irregular cylinder block 1 with cooling fins shown has only the cylinder neck 101 as a possible clamping point. However, this can easily lead to uneven stress on the entire cylinder block 1 during machining, deformation of the cylinder neck 101, and other problems. Moreover, this cantilevered positioning clamping method usually makes it difficult to achieve precise centering of the cylinder block. During machining, stress transmission can cause positional shifts or even workpiece deformation, resulting in significant positioning deviations of the cylinder block. This, in turn, leads to insufficient hole accuracy of the end face 102 and poor coaxiality of the hole system, affecting subsequent assembly. Secondly, uneven clamping force or over-clamping is prone to occur during clamping. The aluminum alloy material is different from the cast iron cylinders of traditional old engines. It has better machinability, but it is also more prone to deformation, reducing the product yield.

[0003] In the prior art, in order to improve drilling efficiency, such as the existing patent with publication number CN204748013U, a processing device for machining the end face of a motorcycle engine cylinder block is introduced. This processing device directly pre-installs multiple drill bits required for machining several holes on the cylinder on a machine tool, and then uses multiple sets of drive devices to simultaneously drive these drill bits to rotate and move to achieve synchronous drilling. This is actually a common method currently used to improve drilling efficiency. The structural principle is very simple, which is just a simple combination of drilling equipment. Each drill bit needs to be equipped with a separate drive device such as a motor and a linear feed mechanism, which makes the actual processing device structure very bulky and lacks intelligence. Moreover, if the drive device of an individual drill bit fails, it will affect the drilling of all drill bits. Therefore, developing a machining equipment for the end face of motorcycle engine cylinder blocks that can achieve precise centering and clamping, high automation, high processing efficiency, and protection of equipment and workpieces has become an urgent technical problem to be solved in the industry. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a machining device for machining cylinder end faces of motorcycle engines, thereby improving the automation level of machining cylinder end faces, increasing machining efficiency and the reliability of clamping and positioning, and maintaining the consistency of the relative positional relationship of each cylinder end face, which is beneficial for subsequent assembly.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a machining device for drilling end holes in a motorcycle engine cylinder, comprising a frame and a main column mounted on the frame via a drive shaft, and several inner support rods and outer claw rods. The main column is used for pre-installation after the cylinder block is fitted onto it. The inner support rods and outer claw rods are respectively installed in a circular array within the main column, and each is connected to a corresponding drive disc via a planar threaded pair, so that the inner support rods and outer claw rods are installed in a radially opposite manner along the main column. One end of the inner support rod extending beyond the main column is used to press against the inner wall of the cylinder, while the other end of the outer claw rod extending beyond the main column is used to press against the outer wall of the cylinder neck. A stud is threaded onto the end of the outer claw rod that presses against the cylinder neck, and one end of the stud is coaxially fixed with a tool for drilling end holes in the cylinder block. The drill bit has a gear rod coaxially fixed at one end. All gear rods are arranged in a ring around a drive gear disk and are initially in a semi-meshing state with the drive gear disk. The drive gear disk is meshed with a transmission gear, which is fixed on the main shaft of the motor. The two transmission disks are connected to a rotatable transmission shaft, on which a drive gear disk is coaxially mounted. The transmission shaft is equipped with an intelligent monitoring element to monitor the movement status of the transmission shaft. During the rotation of the transmission shaft, the two transmission disks rotate. When the intelligent monitoring element detects that the transmission shaft cannot rotate, the following working state is reached: the inner support rod and the outer claw rod clamp the cylinder body, the drill bit is in a position coaxial with the end face of the cylinder body, the gear rod moves to a position where it is normally meshed with the drive gear disk, and the motor starts.

[0006] Furthermore, the main column includes a first column and a second column that are fixed to each other by several connecting rods in a ring array. The first column is used to slide the inner support rod. The two transmission discs are coaxially and integrally connected by a connecting sleeve. One end of the connecting sleeve near the first transmission disc is rotatably installed inside the end face of the first column. The other end of the connecting sleeve passes through the second column and connects to the second transmission disc. The two transmission discs are provided with planar threads at one end of their respective corresponding columns so as to engage with the planar threads on the surface of their corresponding inner support rods or outer claw rods.

[0007] Furthermore, a spline hole is provided in the center of both the first and second transmission discs to slide with the two spline shafts on the transmission shaft respectively; the end face of the first column is provided with a threaded bottom hole, and the end of the transmission shaft has a threaded shaft section that mates with the threaded bottom hole. When the threaded shaft section is screwed into the threaded bottom hole to the bottom, the working state is achieved.

[0008] Furthermore, the intelligent monitoring element includes a sensing element located at the bottom of the threaded bottom hole, which automatically starts the motor when the sensing element detects that the threaded shaft section is screwed in to the bottom.

[0009] Furthermore, the sensing element is a start button installed at the bottom of the threaded bottom hole. When the start button pops up and enters the threaded bottom hole, the motor remains in a stopped state. The start button is pressed into place only when the threaded shaft section is screwed in all the way to start the motor.

[0010] Furthermore, the sensing element is a pressure sensing chip, which is built into the bottom of the threaded hole, and its force-bearing surface is flush with the bottom surface of the threaded hole. When the threaded shaft is screwed in to the bottom, it squeezes the pressure sensing chip, causing the motor to start automatically.

[0011] Furthermore, the intelligent monitoring element also includes a color sensor and a color block. The color block is embedded in the side of the drive shaft. When the drive shaft stops moving, the color block is directly opposite the color sensor and triggers the motor to start.

[0012] Furthermore, it also includes a top frame fixed to the frame and capable of moving coaxially toward the main column. The free end of the top frame has a pressure ring installed axially elastically via a circular compression spring. The pressure ring is used to contact the end of the cylinder body away from the cylinder neck. The free end of the top frame has a circular boss in the center. When the top frame approaches the end face of the main column, the circular boss and the end face of the main column are coaxially abutted together, and the circular compression spring is in a compressed state.

[0013] Furthermore, the inner support rod includes a tubular support plate for contacting the inner wall of the cylinder block; the outer claw rod includes a tubular mounting plate, the free end of which contacts the annular stepped surface of the cylinder block near the cylinder neck, and the outer side of the mounting plate has a protruding threaded tube for threaded installation of the stud; both the inner support rod and the outer claw rod adopt a T-shaped slider structure, and the mounting groove of the main column for sliding installation of the inner support rod and the outer claw rod is a T-shaped groove.

[0014] Furthermore, several threaded sleeves are fixedly connected to the end of the external claw rod to install studs with corresponding drill bits. The gear rods corresponding to the two drill bits in the adjacent cylinder end holes mesh with each other, and the length and installation position of each stud must ensure that a corresponding hole depth difference is generated during the drilling process. Several guide rods are also telescopically movable on the frame. All guide rods are coaxially aligned with all the cylinder end holes to be drilled, and when the intelligent monitoring element detects that the drive shaft stops moving, all guide rods automatically insert into the corresponding gear rods.

[0015] (III) Beneficial Effects This invention provides a machining device for machining holes at the end faces of motorcycle engine cylinders, which mainly has the following beneficial effects: The machining device for machining holes at the end faces of motorcycle engine cylinders not only improves the reliability of positioning and clamping, but also greatly simplifies the drive system for simultaneous drilling of multiple drill bits, achieving many beneficial effects, as follows: 1. High degree of automation, improving processing efficiency: This processing device is equipped with intelligent monitoring elements that enable automatic drilling based on the movement status of the drive shaft. When the inner support rod and outer jaw rod clamp the cylinder into place and the drill bit is coaxially aligned with the preset position of the end face hole, the intelligent monitoring elements automatically trigger the motor to start, realizing automated start of drilling. After processing is completed, simply rotating the drive shaft in the opposite direction will automatically stop the motor, eliminating the need for manual intervention, simplifying the operation process, and significantly improving processing efficiency. In addition, multiple drill bits working simultaneously can drill multiple end face holes at the same time, further shortening the processing cycle.

[0016] 2. Precise and reliable centering and clamping, improving machining accuracy: The device uses the reverse sliding cooperation of the inner support rod and the outer claw rod. The inner support rod is in contact with the inner wall of the cylinder to achieve internal support and centering, while the outer claw rod presses against the outer wall of the cylinder neck to achieve external clamping. The two work together to form a "two-way centering and clamping mechanism", which not only effectively avoids the positioning deviation caused by a single clamping method, but also ensures the accurate positioning of the cylinder, thereby ensuring the hole position accuracy and hole system coaxiality of the end face holes.

[0017] 3. Protect equipment and workpiece, and extend equipment service life: The mating structure of the threaded shaft section of the drive shaft and the threaded bottom hole of the main column not only realizes the synchronous rotation and axial movement of the drive shaft, but also automatically fixes the drive shaft by thread engagement after clamping, without the need for additional components to provide fixing force. This greatly reduces the reaction force on the drive components, avoids damage to the drive components, and extends the service life of the equipment. At the same time, the automatic clamping state is achieved when the thread engagement is in place, avoiding cylinder deformation or damage caused by over-clamping and ensuring the processing quality of the workpiece.

[0018] In addition, the external claw rod is threaded with the stud through the threaded sleeve, which facilitates the disassembly and replacement of drill bits of different specifications and is suitable for the machining of cylinders with different models and hole diameters. The number of internal support rods and external claw rods can be flexibly adjusted according to the number of holes drilled and the cylinder specifications, without the need to replace the entire set of fixtures, which reduces processing costs and equipment adjustment time, and improves the versatility and applicability of the device. Attached Figure Description

[0019] Figures 1-2 A three-dimensional structural diagram of a motorcycle cylinder block to be manufactured; Figure 3 A side view of a motorcycle cylinder block to be manufactured; Figure 4 for Figure 3 AA section view in the middle; Figure 5 A schematic diagram of the structure when the cylinder block is installed on the cylinder end face hole machining device of a motorcycle engine; Figure 6 This is a schematic diagram of a two-disc integrated structure; Figure 7 for Figure 6 BB section view in the middle; Figure 8 A schematic diagram of a specific structure for the main column; Figure 9 for Figure 8 CC section view in the middle; Figure 10 for Figure 5 Right view of the inner strut in the upper middle section; Figure 11 for Figure 5 Right view of the upper middle part of the outer claw bar; Figure 12 for Figure 5 Left view of the upper middle part of the outer claw bar; Figures 13-14 Two schematic diagrams showing the gear in a semi-engaged state; Figure 15 This is a schematic diagram of gears in normal meshing. Figure 16 This is a partial schematic diagram of the processing device when a guide rod is provided.

[0020] In the diagram: Cylinder body 1, Cylinder neck 101, End hole 102, Main column 2, First column 201, Mounting groove 20101, Threaded bottom hole 20102, Second column 202, Connecting rod 203, Transmission disc 3, First transmission disc 301, Spline hole 30101, Second transmission disc 302, Connecting sleeve 303, Transmission shaft 4, Splined shaft 401, Threaded shaft section 402, Drive gear disc 5, Inner support rod 6, Support bearing 7, Outer claw rod 8, Threaded tube 801, Bearing 802, Drill bit 9, Stud 10, Gear rod 11, Hydraulic cylinder 12, Transmission gear 13, Color sensor 14, Color block 15, Top bracket 16, Circular compression spring 17, Pressure ring 18, Circular boss 19, Sensing element 20, Guide rod 21. Detailed Implementation

[0021] This specification will clearly and completely describe the technical solutions in the following embodiments based on the accompanying drawings. The embodiments described in this specification are only some embodiments of the present invention, not all embodiments. All other embodiments derived by those skilled in the art based on these embodiments without creative effort should fall within the protection scope of the present invention.

[0022] This embodiment specifically describes a machining device for machining the end face of a motorcycle engine cylinder, wherein the structure of the cylinder block 1 machined is as follows. Figures 1-4 As shown, please refer to the following: Figure 5 As shown, the machining device for the end face of a motorcycle engine cylinder mainly includes a frame and a drive shaft 4. The frame, as the main structure of this machining device, undertakes the function of installing a series of components. In specific manufacturing, the drive shaft 4 is rotatably mounted on the frame, for example, driven by an electric motor to rotate, and driven axially by a hydraulic cylinder 12. The hydraulic cylinder 12 is mounted on the end of the main shaft of the electric motor, and the drive shaft 4 is detachably mounted on the piston rod of the hydraulic cylinder 12, thus realizing the rotation and axial movement of the drive shaft 4. During installation, the main column 2 can be connected to the drive shaft 4. The drive shaft 4 can rotate and move axially within the main column 2. The purpose is to allow the main column 2 to serve as the mounting carrier for the transmission disc 3 mentioned below during specific manufacturing, and also to facilitate the concentrated transmission of the two transmission discs 3 by the drive shaft 4 during installation. During manufacturing, the outer diameter of the main column 2 is matched with the inner diameter of the motorcycle engine cylinder block 1, that is, the outer diameter of the main column 2 is slightly smaller than the inner diameter of the engine cylinder block 1, so that the cylinder block 1 can be quickly fitted onto the main column 2, realizing the pre-temporary installation of the cylinder block 1 to be processed, for subsequent positioning, clamping, and fixing. In this embodiment, there are two key components: several inner support rods 6 and outer claw rods 8 are provided on the main column 2. Both the inner support rods 6 and the outer claw rods 8 are provided in several parts, and as shown... Figure 5As shown, these rods are distributed in a circular array and are installed in the corresponding mounting slots 20101 of the main column 2 for sliding installation. During assembly, each of these inner support rods 6 and outer claw rods 8 corresponds to a transmission disk 3, which drives the inner support rods 6 or outer claw rods 8 to slide synchronously. Specifically, the transmission disk 3 can be connected to the inner support rods 6 and outer claw rods 8 through a planar threaded pair, so that the inner support rods 6 and outer claw rods 8 can slide in opposite directions along the radial direction of the main column 2. For example, when the inner support rods 6 move closer to the inner wall of the cylinder body 1, the outer claw rods 8 also move closer to the cylinder body 1, specifically closer to the outer side of the cylinder neck 101 of the cylinder body 1, thereby clamping the cylinder body 1 and generating a centering effect, centering and fixing the cylinder body 1, which was originally placed outside the main column 2, for drilling. More specifically, in this embodiment, the end of the inner support rod 6 extending outward toward the main column 2 is the fitting end, which is used to fit and contact the inner wall of the cylinder body 1 to support the inner wall of the cylinder body 1 and achieve internal support and centering. The end of the outer claw rod 8 extending outward toward the main column 2 is the pressing end, which is used to press against the outer wall of the cylinder neck 101 of the cylinder body 1 to achieve external clamping and centering. In practice, provided the clamping force is sufficient, the contact between the end of one of the rods and the cylinder body 1 can be designed to be slightly elastic. For example, a slightly elastic wear-resistant rubber pad can be embedded, or a spring can be added. This reduces the requirements for the machining accuracy and installation accuracy of the planar thread transmission and corresponding rods in this processing device, making it more economical. Centering can be achieved by relying on only one type of annular array rod. Generally, the inner support rod 6 is the best choice for centering, and only three centering rods are needed. The number of outer gripping rods depends on the number of holes drilled. Too many rods are not conducive to automatic centering. Therefore, the inner support rod 6 can play the role of centering, while the outer gripping rod 8 can cooperate with the inner support rod 6 to perform the clamping function. However, for cases with large cutting forces or large drilling sizes, it is advisable to make both types of rods in rigid contact with the cylinder body 1. This avoids the possibility that if one of the rods uses elastic compression clamping on the cylinder body 1 during processing, the excessive cutting force may cause frequent vibrations, affecting the machining accuracy.

[0023] As one specific implementation method, a threaded through hole is provided at the clamping end of the outer claw rod 8, such as... Figure 5As shown, a stud 10 is threaded into the through hole. Initially, the stud 10 is arranged axially parallel to the hole to be drilled, and one end of the stud 10 is coaxially fixed to the drill bit 9, which is used to drill the end face hole 102 of the cylinder block. The other end of each stud 10 is coaxially fixed to a corresponding gear rod 11. Ideally, the two can be integrally formed. The so-called gear rod 11 refers to a gear with a relatively thick thickness, ultimately forming a rod-shaped special gear like an involute spline shaft 401. The length of the drill bit 9 is designed for adaptability; if necessary, it can be selected to be directly equal to the depth of the hole to be drilled. All gear rods 11 are arranged in a ring array around the drive gear disk 5. In the initial state, each gear rod 11 is in a position similar to that of the drive gear disk 5. Figure 13 or Figure 14 The semi-engaged state shown indicates that the gear rod 11 is in contact with the teeth of the driving gear disk 5, but not fully engaged. There is still a relative displacement between them in the direction of their center distance from the ground. Generally, the module of the gear used for drilling with the transmission drill bit 9 can be 2 or even larger. Therefore, the tooth height of the gear rod 11, with a diameter of 4-5 cm, can reach 4-5 mm or even higher. This allows the gear rod 11 to have a larger displacement relative to the driving gear disk 5 in the semi-engaged state. That is, there can be a larger initial clearance between the end of the outer claw rod 8 and the cylinder neck 101 of the cylinder body 1, so that the cylinder neck 101 of the cylinder body 1 can be more easily inserted into the area between the inner support rod 6 and the outer claw rod in the initial state, achieving pre-positioning of the cylinder body 1 for subsequent clamping and fixing. Figure 5 The drive gear disk 5 is constantly meshed with a transmission gear 13. The thickness of the transmission gear 13 should preferably be greater than that of the drive gear disk 5 to better ensure that the drive gear disk 5 and the transmission gear 13 never disengage when the drive gear disk 5 moves axially to a set displacement. The transmission gear 13 is fixedly mounted on the main shaft of the motor, thereby driving the transmission gear 13 to rotate, which in turn causes the drive gear disk 5 to rotate.

[0024] In the specific production process, such as Figure 5 , Figure 6As shown, both transmission discs 3 are connected to the transmission shaft 4 and can rotate synchronously with the rotation of the transmission shaft 4. The drive gear disc 5 is synchronously mounted on the transmission shaft 4, that is, it rotates synchronously with the transmission shaft 4, and the two rotate as a whole. In addition, an intelligent monitoring element is also required on the transmission shaft 4. This intelligent monitoring element is used to monitor the movement status of the transmission shaft 4 in real time, such as whether it moves axially or rotates. In specific operation, an external force drives the transmission shaft 4 to rotate, and the transmission shaft 4 drives the two transmission discs 3 to rotate together. Through the transmission action of the planar thread pair, the inner support rod 6 and the outer claw rod 8 are driven to slide in the opposite direction radially, gradually clamping the cylinder body 1 and realizing the centering installation of the cylinder body 1. When the intelligent monitoring element detects that the transmission shaft 4 can no longer rotate, that is, when it stops rotating, the processing device reaches the preset working state: at this time, the inner support rod 6 and the outer claw rod 8 just firmly clamp the cylinder body 1, the drill bit 9 is coaxially aligned with the preset position of the end face 102 of the cylinder body 1, and the gear rod 11 and the drive gear disc 5 move to such a position as Figure 15 The normal meshing state is shown, for example, forming a standard meshing; at the same time, the motor controller starts after receiving the information that the transmission shaft 4 has stopped moving as detected by the intelligent monitoring element, and thereby drives the transmission gear 13 and the drive gear disk 5 to rotate, driving the drill bit 9 to rotate, and completing the drilling of multiple end face holes 102 of the cylinder body, for example, the simultaneous machining of four screw holes on the end face of the cylinder body 1 in a ring array. In this embodiment, the main column 2 is as follows: Figure 5 , Figures 8-9As shown, it mainly consists of a cylindrical stepped first column 201 and a second column 202. The first column 201 and the second column 202 are connected and fixed by several connecting rods 203. The connecting rods 203 are arranged in a ring array to ensure that the first column 201 and the second column 202 are coaxially arranged and stably connected. Among them, the first column 201 is specifically used for sliding installation of the inner support rod 6. The first column 201 has a number of mounting grooves 20101 matching the number of inner support rods 6, allowing the inner support rods 6 to slide radially. The second column 202 also has grooves with the same mounting grooves 20101. In practice, the two transmission discs 3 are coaxially and integrally connected by a connecting sleeve 303 to form a single structure, preferably manufactured as a single piece. One end of the connecting sleeve 303, near the first transmission disc 301, is rotatably mounted inside the end face of the first column 201. The other end of the connecting sleeve 303 passes through the second column 202 and is fixedly connected to the second transmission disc 302, enabling the connecting sleeve 303 to drive the two transmission discs 3 to rotate synchronously. The end of the first transmission disc 301 facing the first column 201 is provided with a planar thread, which meshes with the planar thread on the surface of the inner support rod 6 facing the first transmission disc 301. The end of the second transmission disc 302 facing the second column 202 is also provided with a planar thread, which meshes with the planar thread on the surface of the outer claw rod 8 facing the second transmission disc 302. When the transmission shaft 4 drives the connecting sleeve 303 and the two transmission discs 3 to rotate synchronously through a spline engagement, the inner support rod 6 and the outer claw rod 8 slide in opposite directions based on the transmission of the planar thread pair. Specifically, regarding the spline structure described above, as follows: Figures 6-7 As shown, a spline hole 30101 is provided in the center of the first transmission disk 301, and the same hole is provided in the center of the second transmission disk 302. Two splined shaft sections 401 are correspondingly provided on the transmission shaft 4. These two splined shaft sections 401 are slidably engaged with the spline holes 30101 of the first transmission disk 301 and the second transmission disk 302, respectively, so that the transmission shaft 4 does not lose its synchronous rotational connection with the transmission disk 3 when sliding axially. A threaded bottom hole 20102 is provided in the center of the end face of the first column 201, and a threaded shaft section 402 is provided at the end of the transmission shaft 4. The threaded shaft section 402 matches the thread specification of the threaded bottom hole 20102, allowing it to be screwed into the threaded bottom hole 20102 and maintaining a threaded connection at all times. During operation, the drive shaft 4 is rotated, and the threaded shaft section 402 is gradually screwed into the threaded bottom hole 20102. During this process, the drive disc 3 is driven to rotate, which in turn drives the inner support rod 6 and the outer claw rod 8 to clamp the cylinder body 1 through the planar thread pair. When the threaded shaft section 402 is screwed into the threaded bottom hole 20102 to the bottom, the inner support rod 6 and the outer claw rod 8 just clamp the cylinder body 1. The drill bit 9 is coaxially aligned with the end face hole 102 of the cylinder body, and the gear rod 11 meshes normally with the drive gear disc 5. The processing device achieves the above-mentioned working state. In specific implementation, the intelligent monitoring element includes a sensing element 20, which is installed at the bottom of the threaded bottom hole 20102 and electrically connected to the motor via an existing control system such as a controller. This sensing element 20 is used to detect whether the threaded shaft section 402 is fully screwed in. When the threaded shaft section 402 is not fully screwed in, the sensing element 20 is not triggered, and the motor remains stopped. When the threaded shaft section 402 is fully screwed in, the end of the threaded shaft section 402 contacts the sensing element 20, triggering the sensing element 20 to emit an electrical signal, controlling the motor to automatically start and begin drilling. This achieves intelligent triggering and starting of the device, improving processing efficiency and ease of operation. In this embodiment, the sensing element 20 can also be a conventional start button. This start button is installed at the bottom of the threaded bottom hole 20102. The button end of the start button pops up and extends into the threaded bottom hole 20102. The start button is electrically connected to the motor. Initially, the start button is not pressed, and the motor is stopped. As the threaded shaft section 402 gradually screws into the threaded bottom hole 20102, the end of the threaded shaft section 402 gradually approaches the start button. When the threaded shaft section 402 is fully screwed in, the end of the threaded shaft section 402 presses the start button into place, automatically triggering the start button and sending a start signal to the motor. The motor then starts drilling. After machining is completed, the drive shaft 4 is rotated in the opposite direction, the threaded shaft section 402 unscrews out of the threaded bottom hole 20102, the start button pops up and resets, and the motor automatically stops. In this embodiment, the sensing element 20 can also be a pressure sensing chip, which is built into the bottom of the threaded bottom hole 20102. Its force-bearing surface is flush with the bottom surface of the threaded bottom hole 20102, ensuring that the threaded shaft section 402 can accurately press against the pressure sensing chip when screwed in to the bottom. The pressure sensing chip is electrically connected to the motor control circuit. In the initial state, the pressure sensing chip is not under pressure and outputs a low-level signal, and the motor remains stopped. When the threaded shaft section 402 is screwed in to the bottom, the end of the threaded shaft section 402 presses against the pressure sensing chip. After detecting the preset pressure value, the pressure sensing chip outputs a high-level signal, controlling the motor to start automatically, realizing the automated triggering of drilling. At the same time, the pressure sensing chip can accurately detect the clamping position, avoiding damage to the cylinder body 1 caused by insufficient or excessive clamping force. In addition to the components used to monitor the movement of the drive shaft 4, the intelligent monitoring element in this embodiment also includes a color sensor 14 and a color block 15. The color block 15 is embedded inside the side of the drive shaft 4 and does not protrude from the surface of the drive shaft 4, thus avoiding affecting the rotation of the drive shaft 4 and the cooperation of other components. The color sensor 14 is fixedly mounted on the frame, with its sensing end facing the side of the drive shaft 4 and its position matching that of the moved color block 15. Initially, the color block 15 is not directly facing the color sensor 14, and the color sensor 14 is not triggered. When the drive shaft 4 rotates to the point where it can no longer rotate (i.e., when the threaded shaft section 402 is screwed in completely), the drive shaft 4 stops moving. At this time, the color block 15 is directly facing the color sensor 14. After the color sensor 14 detects the color signal of the color block 15, it triggers the motor to start. In cooperation with other monitoring components, this further improves the accuracy and reliability of the device's startup and avoids false startup or failure to start. It should be noted that in the above embodiments, the reason for using a drive shaft 4 with a threaded shaft section 402 and a threaded bottom hole 20102 to achieve parallel rotation and axial movement is mainly that when the thread is fully engaged, the drive shaft 4 can be automatically fixed without the need for additional components to fix the drive shaft 4. For example, if a motor, electric actuator, or hydraulic cylinder 12 is used to drive the drive shaft 4, maintaining the stability of the drive shaft 4 requires the motor, hydraulic cylinder 12, electric actuator, etc., which will inevitably generate reaction force on these components. Especially during the processing, these components are easily damaged. However, by setting a threaded pair for fixing, it is possible to achieve automatic fixing by the thread engagement after the rotational feed is adjusted to the correct position, and the reaction force on the above components is relatively much smaller. Moreover, when the threaded connection is fully engaged, it can automatically determine the clamping position of the cylinder body 1, without relying on the inner support rod 6 and the outer gripper rod to clamp the cylinder body 1. This prevents the transmission shaft 4 from rotating due to the clamping action, thus forcing the transmission shaft 4 to stop moving. Similar to protecting the aforementioned components, it also protects the cylinder body 1 from being over-clamped, deformed, or even damaged, ensuring reliable use and installation.

[0025] To facilitate the initial installation and fixing of cylinder block 1, such as Figure 5As shown, this embodiment also includes a top frame 16, which is fixedly mounted on the frame. The top frame 16 can move coaxially towards or away from the main column 2, and this movement can be achieved through a drive mechanism such as a cylinder or lead screw. An annular groove (not shown in the figure) is provided on the free end face of the top frame 16. A circular compression spring 17 is installed in this annular groove, and a compression ring 18 is axially elastically telescopically mounted through the circular compression spring 17. The end face of the compression ring 18 is flat and is used to contact the end of the cylinder body 1 away from the cylinder neck 101. Furthermore, a circular boss 19 is provided at the center of the free end of the top frame 16. The axis of the circular boss 19 coincides with the axis of the main column 2. When the top frame 16 moves towards the main column 2, the circular boss 19 first coaxially contacts the end face of the main column 2, and then cooperates with components such as the hydraulic cylinder 12 that drives the transmission shaft 4 to move axially, thus axially tightening and fixing the top frame 16, keeping the main column 2 in a fixed state. Of course, a cylindrical core can also be machined at the end of the main column 2 to be directly fixed to the chuck or other components mounted on the frame, thus directly fixing the main column 2. When using the top frame 16 for fixing, ensure that the top frame 16 is coaxial with the main column 2. As the top frame 16 continues to move closer, the circular compression spring 17 is compressed, and the pressure ring 18 fits against the end face of the cylinder body 1, applying a preload to the cylinder body 1. This allows the cylinder body 1 to change its posture relatively stably when the inner support rod 6 and the outer claw rod 8 center and clamp the cylinder body 1, further improving the stability of the cylinder body 1 during the machining process. like Figure 5 , Figure 10 As shown, in this embodiment, the inner support rod 6 includes a tubular support plate 7. The curvature of the support plate 7 matches the curvature of the inner wall of the cylinder body 1, ensuring that the support plate 7 can fully fit and contact the inner wall of the cylinder body 1, increasing the contact area, avoiding local compression damage to the inner wall of the cylinder body 1 caused by the inner support rod 6, and improving the stability of the inner support. Figure 5 , Figures 11-12 The outer claw rod 8 includes a tubular plate-shaped bearing 802. The free end of the bearing 802 has a mating surface that matches the annular stepped surface of the cylinder neck 101 of the cylinder block 1, for close contact with the annular stepped surface of the cylinder block 1 near the cylinder neck 101, achieving reliable clamping. A threaded tube 801 is integrally protruding from the outer surface of the bearing 802. The internal thread of the threaded tube 801 matches the external thread of the stud 10, allowing for threaded installation of the stud 10, facilitating its disassembly and replacement, and consequently, facilitating the replacement of different sizes of drill bits 9 to meet the machining needs of different models of cylinder blocks 1. Generally, modern motorcycle cylinder blocks 1 are made of aluminum alloy, which has excellent machinability and is easier to cut than older cast iron cylinder blocks 1. Therefore, threaded drive is sufficient for general drilling. Thus, the threaded tube 801 does not need to be a high-strength trapezoidal thread; it is only recommended when machining holes in harder materials or very large cylinder blocks 1. More specifically, such as... Figures 10-12 Both the inner support rod 6 and the outer claw rod 8 adopt a T-shaped slider structure. The mounting groove 20101 on the main column 2 for sliding installation of the inner support rod 6 and the outer claw rod 8 are all T-shaped sliding grooves. The T-shaped slider and the T-shaped sliding groove slide together, which can effectively prevent the inner support rod 6 and the outer claw rod 8 from falling off during the sliding process, while ensuring the smoothness of the sliding and the accuracy of the radial positioning, ensuring that the inner support rod 6 and the outer claw rod 8 can slide stably along the radial direction of the main column 2. In this embodiment, the end of the external claw rod 8 is fixedly connected with several threaded sleeves. The number of threaded sleeves matches the number of end holes 102 on the cylinder body to be drilled. Each threaded sleeve has a stud 10 threadedly installed inside. One end of each stud 10 is fixed with a corresponding drill bit 9, which is used to drill multiple end holes 102 on the cylinder body simultaneously, improving processing efficiency. Based on this, for the remaining scattered holes in the non-annular array, such as... Figure 16 As shown, the gear rods 11 connected to the two drill bits 9 corresponding to the adjacent cylinder end face holes 102 mesh with each other, enabling the adjacent gear rods 11 to rotate synchronously, thereby driving the corresponding drill bits 9 to rotate synchronously, ensuring the machining synchronization of multiple end face holes 102 and improving hole position accuracy. The length and installation position of each stud 10 are precisely designed to ensure that during the drilling process, different drill bits 9 can drill the required depth difference between adjacent holes, meeting the design requirements of the cylinder body 1 end face holes 102, and drilling more holes at once. In addition, for occasions requiring precise drilling, such as drilling other locating pin holes instead of ordinary smooth threaded holes, etc., as shown in the figure. Figure 16 As shown, several guide rods 21 can also be installed on the frame. The guide rods 21 can be extended and retracted through telescopic mechanisms such as telescopic rods. The axis of all guide rods 21 is coaxially aligned with the axis of all the end holes 102 of the cylinder body to be drilled. When the intelligent monitoring element detects that the transmission shaft 4 stops moving (i.e., the device reaches the working state), the telescopic mechanism drives the guide rods 21 to automatically extend and insert into the corresponding insertion hole (not shown in the figure) machined at the end of the gear rod 11. This provides precise guidance and positioning for the gear rod 11, preventing the gear rod 11 from deviating during rotation, thereby ensuring the drilling accuracy of the drill bit 9, preventing problems such as skewness and misalignment in drilling, and improving drilling accuracy.

[0026] It should be clarified here that, in this specification, terms such as "first" and "second" are merely used to distinguish one feature from another, and do not imply any inherent relationship or order between these technical features. The terms "comprising" and "including" mean that something contains one or more technical means or features, specifically referring to other existing or non-existent technical features not listed above. The descriptions in the above embodiments are merely representative examples for the purposes of this invention and are not the only limiting features. Those skilled in the art should understand that, without departing from the technical content described in all claims of this application, simple substitutions and modifications can be made to create different or equivalent specific embodiments and application scenarios. However, regardless of these adaptive changes, all such embodiments must fall within the protection scope of this invention.

Claims

1. A machining device for machining bore holes on the cylinder end of a motorcycle engine, characterized in that, Includes a frame and a main column (2) mounted on the frame via a drive shaft (4), as well as several inner support rods (6) and outer claw rods (8). The main column (2) is used for pre-installation after the cylinder body (1) is fitted on. The inner support rods (6) and outer claw rods (8) are installed in the main column (2) in a circular array and are connected to a corresponding drive disc (3) via a planar threaded pair, so that the inner support rods (6) and outer claw rods (8) are installed in a radially opposite manner along the main column (2). The end of the inner support rod (6) extending out of the main column (2) is used to press against the inner wall of the cylinder body (1), while the end of the outer claw rod extending out of the main column (2) is used to press against the outer wall of the cylinder neck (101). The external claw rod (8) presses a stud (10) at one end of the cylinder neck (101). A drill bit (9) for drilling the end face hole (102) of the cylinder body is coaxially fixed at one end of the stud (10), and a gear rod (11) is coaxially fixed at the other end. All gear rods (11) are arranged in a ring around a drive gear disk (5), and in the initial state, they are all in a semi-meshing state with the drive gear disk (5). The drive gear disk (5) is meshed with a transmission gear (13), which is fixed on the main shaft of the motor. Two transmission discs (3) are connected to the rotatable transmission shaft (4). A drive gear disc (5) is coaxially mounted on the transmission shaft (4). The transmission shaft (4) is equipped with an intelligent monitoring element that monitors the motion state of the transmission shaft (4). During the rotation of the transmission shaft (4), the two transmission discs (3) are driven to rotate. When the intelligent monitoring element detects that the transmission shaft (4) cannot rotate, the following working state is reached: the inner support rod (6) and the outer claw rod (8) clamp the cylinder body (1), the drill bit (9) is in a position coaxial with the end face hole (102) of the cylinder body, the gear rod (11) moves to a position where it is normally meshed with the drive gear disc (5), and the motor starts.

2. The device for machining bore holes on the cylinder end of a motorcycle engine according to claim 1, characterized in that, The main column (2) includes a first column (201) and a second column (202) that are fixed together by several connecting rods (203) in a ring array. The first column (201) is used to slide the inner support rod (6). The two transmission discs (3) are coaxially connected by a connecting sleeve (303). One end of the connecting sleeve (303) near the first transmission disc (301) is rotatably installed inside the end face of the first column (201). The other end of the connecting sleeve (303) passes through the second column (202) and connects to the second transmission disc (302). The two transmission discs (3) are provided with a planar thread at one end of their respective corresponding columns so as to engage with the planar thread on the surface of the inner support rod (6) or the outer claw rod (8) opposite to them.

3. The device for machining bore holes on the cylinder end of a motorcycle engine according to claim 2, characterized in that, A spline hole (30101) is provided in the center of the first transmission disk (301) and the second transmission disk (302) to slide with the two spline shafts (401) on the transmission shaft (4) respectively; the end face of the first column (201) is provided with a threaded bottom hole (20102), and the end of the transmission shaft (4) has a threaded shaft section (402) that mates with the threaded bottom hole (20102). When the threaded shaft section (402) is screwed into the threaded bottom hole (20102) to the bottom, the working state is achieved.

4. The apparatus for machining bore holes on the cylinder end of a motorcycle engine according to claim 3, characterized in that, The intelligent monitoring element includes a sensing element (20) located at the bottom of the threaded bottom hole (20102). When the sensing element (20) senses that the threaded shaft section (402) is screwed in to the bottom, the motor is automatically started.

5. The apparatus for machining bore holes on the cylinder end of a motorcycle engine according to claim 4, characterized in that, The sensing element (20) is a start button installed at the bottom of the threaded bottom hole (20102). When the start button pops up and enters the threaded bottom hole (20102), the motor remains stopped. The start button is pressed into place when the threaded shaft section (402) is screwed in to the bottom to start the motor.

6. The apparatus for machining bore holes on the cylinder end of a motorcycle engine according to claim 4, characterized in that, The sensing element (20) is a pressure sensing chip. The pressure sensing chip is built into the bottom of the threaded bottom hole (20102), and its force-bearing surface is flush with the bottom surface of the threaded bottom hole (20102). When the threaded shaft section (402) is screwed in to the bottom, it squeezes the pressure sensing chip and causes the motor to start automatically.

7. The apparatus for machining bore holes on the cylinder end of a motorcycle engine according to claim 1, characterized in that, The intelligent monitoring element also includes a color sensor (14) and a color block (15). The color block (15) is embedded in the side of the transmission shaft (4). When the transmission shaft (4) stops moving, the color block (15) is exactly facing the color sensor (14) and triggers the motor to start.

8. The apparatus for machining bore holes on the cylinder end of a motorcycle engine according to claim 1, characterized in that, It also includes a top frame (16) fixed to the frame and capable of moving coaxially toward the main column (2). The free end of the top frame (16) has a pressure ring (18) installed axially elastically via a circular compression spring (17). The pressure ring (18) is used to contact the end of the cylinder body (1) away from the cylinder neck (101). The free end of the top frame (16) has a circular boss (19) in the center. When the top frame (16) approaches the end face of the main column (2), the circular boss (19) and the end face of the main column (2) are coaxially abutted and connected, and the circular compression spring (17) is in a compressed state.

9. A machining device for machining end holes of a motorcycle engine cylinder according to claim 1, characterized in that, The inner support rod (6) includes a tubular support plate (7) for contacting the inner wall of the cylinder body (1); the outer claw rod (8) includes a tubular plate-shaped plate (802) for contacting the annular stepped surface of the cylinder body (1) near the cylinder neck (101) at its free end; the outer side of the plate (802) has a threaded tube (801) protruding from it, and the threaded tube (801) is used for threaded installation of the stud (10); Both the inner support rod (6) and the outer claw rod (8) adopt a T-shaped slider structure, and the main column (2) provides a T-shaped sliding groove for the inner support rod (6) and the outer claw rod (8) to slide.

10. A machining apparatus for machining end holes of a motorcycle engine cylinder according to claim 1, characterized in that, The end of the external claw rod (8) is fixedly connected with several threaded sleeves to install studs (10) of corresponding drill bits (9) respectively. The gear rods (11) corresponding to the two drill bits (9) in the adjacent cylinder end hole (102) mesh with each other, and the length and installation position of each stud (10) must ensure that a corresponding hole depth difference is generated during the drilling process. Several guide rods (21) are telescopically movable on the frame. All guide rods (21) are coaxially aligned with all the end holes (102) of the cylinder to be drilled. When the intelligent monitoring element detects that the transmission shaft (4) stops moving, all guide rods (21) are automatically inserted into the corresponding gear rod (11).

Images