A kind of quick positioning tooling for cylinder head combustion chamber measuring point machine
Patent Information
- Application Number
- CN202522363671.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-07
AI Technical Summary
[0004]有鉴于此，本实用新型提供一种汽缸盖燃烧室测点机快速定位工装，主要所要解决的技术问题是：现有汽缸盖与测点机检测位置对接依赖人工、精度低、效率差，且缺乏稳定夹持与精细高度调节的问题
与现有技术相比，该一种汽缸盖燃烧室测点机快速定位工装，通过设置夹持组件，旋转双向丝杆一带动两个夹持块一沿导向杆一相对移动，实现汽缸盖本体前后方向夹持；旋转双向丝杆二带动两个夹持块二沿导向杆二相对移动，实现左右方向夹持；夹持过程中，滚轴一与滚轴二随汽缸盖本体轻微移动，自动调整其位置至安装框中心，实现了对汽缸盖本体的稳定夹持与自动对中作用，解决了现有技术中人工调整对接精度低、易晃动的问题，无需依赖人工经验，即可确保汽缸盖本体精准位于测点机检测正上方，提升检测精度与夹持稳定性。
Smart Images
Figure CN224880353U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rapid positioning, and in particular to a rapid positioning tooling for a cylinder head combustion chamber measuring machine. Background Technology
[0002] With societal development, automotive engines are upgrading towards higher power, lower fuel consumption, and lower emissions. As a core component of the engine, the cylinder head's combustion chamber machining precision directly affects the engine's combustion efficiency, power performance, and emissions standards. Parameters such as the combustion chamber's shape, volume, surface roughness, and key apertures need to be precisely tested using a measuring machine. This machine uses contact or non-contact sensors to collect the combustion chamber's three-dimensional coordinate data, comparing it with design drawings to determine if it meets production standards. Deviations in combustion chamber parameters can lead to poor fuel atomization and incomplete combustion, causing problems such as reduced engine power, increased fuel consumption, and excessive emissions, and may even cause engine knocking and overheating.
[0003] The existing cylinder head and testing machine detection position alignment presents significant inconveniences, mainly in the following aspects: First, traditional positioning methods rely heavily on manual adjustment. Operators need to move the cylinder head onto the testing machine's workbench and manually align the cylinder head combustion chamber with the testing area of the testing machine's sensor by visual observation or with the aid of simple measuring tools. This is not only time-consuming and labor-intensive, but also subject to the operator's experience, making it difficult to guarantee alignment accuracy. Second, there is a lack of dedicated clamping and fixing structures. The cylinder head is relatively heavy, and manual adjustment can easily cause it to tilt due to uneven force. Furthermore, without stable clamping during the adjustment process, the cylinder head is prone to shaking, further affecting alignment accuracy. Utility Model Content
[0004] In view of this, the present invention provides a quick positioning fixture for a cylinder head combustion chamber measuring machine. The main technical problem to be solved is that the existing cylinder head and measuring machine detection position docking relies on manual labor, has low accuracy and poor efficiency, and lacks stable clamping and fine height adjustment.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cylinder head combustion chamber measuring machine quick positioning fixture, including a measuring machine body, a support frame fixedly installed on the top of the measuring machine body, an installation frame installed on the top of the support frame, a clamping assembly installed inside the installation frame, a cylinder head body fixedly installed inside the clamping assembly, and a lifting assembly installed between the support frame and the installation frame. The clamping assembly includes a bidirectional lead screw and a guide rod located on the left and right sides of the inner wall of the mounting frame. Two symmetrical clamping blocks are vertically sleeved on the bidirectional lead screw and the guide rod. The bidirectional lead screw is rotatably mounted on the mounting frame and threadedly connected to the two clamping blocks. The guide rod is fixedly mounted on the mounting frame and slidably connected to the two clamping blocks. The rotation of the bidirectional lead screw drives the two clamping blocks to move towards each other or away from each other in a parallel direction.
[0006] By adopting the above technical solution, the cylinder head body is clamped in both front and rear directions by a bidirectional screw-driven clamping block, and the cylinder head body is automatically centered with the assistance of rollers, ensuring that the cylinder head body is accurately positioned directly above the inspection.
[0007] As a further description of the above technical solution: the clamping assembly also includes an ear plate and a roller. Two ear plates are fixedly connected to the left and right sides of the inner wall of the mounting frame. A bidirectional lead screw is movably installed inside the two ear plates on the right side. A guide rod is fixedly connected between the two ear plates on the left side. A linear bearing is provided inside the left end of the clamping block. The inner wall of the linear bearing is in contact with the outer wall of the guide rod. Multiple rollers are movably installed on the opposite surfaces of the two clamping blocks.
[0008] As a further description of the above technical solution: the clamping assembly includes a bidirectional lead screw 2 and a guide rod 2 disposed on the front and rear sides of the inner wall of the mounting frame. Two symmetrical clamping blocks 2 are vertically sleeved on the bidirectional lead screw 2 and the guide rod 2. The bidirectional lead screw 2 is rotatably mounted on the mounting frame and threadedly connected to the two clamping blocks 2. The guide rod 2 is fixedly mounted on the mounting frame and slidably connected to the two clamping blocks 2. The rotation of the bidirectional lead screw 2 drives the two clamping blocks 2 to move towards each other or away from each other in a parallel direction.
[0009] As a further description of the above technical solution: the clamping assembly also includes ear plate 2 and roller 2. Two ear plates 2 are fixedly connected to the front and rear sides of the inner wall of the mounting frame. Two bidirectional lead screws 2 are movably installed inside the two front ear plates 2. A guide rod 2 is fixedly connected between the two rear ear plates 2. A linear bearing is provided inside the front end of the clamping block 2 9. The inner wall of the linear bearing is in contact with the outer wall of the guide rod 2. Multiple rollers 2 are movably installed on the opposite surfaces of the two clamping blocks 2.
[0010] By adopting the above technical solution, the cylinder head body is clamped in both left and right directions by a bidirectional screw-driven clamping block, and the cylinder head body is automatically centered with the assistance of rollers, ensuring that the cylinder head body is accurately positioned directly above the inspection.
[0011] As a further description of the above technical solution: the lifting assembly includes ear plate three, guide rod three, drive screw, movable ear plate, connecting block and cross connecting frame. Two ear plates three are fixedly connected to the outer walls of both the support frame and the mounting frame. Guide rod three is fixedly connected to the two ear plates three on the mounting frame. Drive screw is movably installed between the two ear plates three on the support frame. Movable ear plates are sleeved on the outer walls of the guide rod three and the drive screw. Movable ear plates are threadedly connected to guide rod three. Connecting blocks are fixedly connected to the outer walls of both the support frame and the mounting frame. Cross connecting frame is movably installed between the two movable ear plates and the two connecting blocks.
[0012] By adopting the above technical solution, the drive screw can be used to extend and retract the cross connecting frame, accurately control the lifting and lowering of the mounting frame, and adjust the detection distance between the cylinder head body and the measuring machine.
[0013] As a further description of the above technical solution: multiple guide posts are fixedly connected to the outer wall of the support frame, and multiple socket blocks are fixedly connected to the outer wall of the mounting frame, with the guide posts located inside the corresponding socket blocks.
[0014] By adopting the above technical solution, the guide post and the socket block are matched to restrict the lifting trajectory of the mounting frame and avoid misalignment of the cylinder head caused by the offset of the mounting frame.
[0015] As a further description of the above technical solution: a baffle is fixedly connected to the top of the guide post, and the baffle is located at the top of the sleeve block.
[0016] By adopting the above technical solution, the baffle block can be prevented from detaching from the guide post, thus preventing the component from falling off due to excessive rise of the mounting frame.
[0017] As a further description of the above technical solution: one end of the bidirectional lead screw passes through the ear plate and the mounting frame, and a cross groove is opened at the end.
[0018] By adopting the above technical solution, a cross-shaped groove is adapted to a cross-shaped screwdriver, which makes it easy for operators to rotate the bidirectional lead screw and quickly adjust the spacing of the clamping blocks.
[0019] As a further description of the above technical solution: one end of the bidirectional lead screw passes through the ear plate and the mounting frame and has a cross groove at the end.
[0020] By adopting the above technical solution, the cross groove two is adapted to the cross screwdriver, which makes it easy for the operator to rotate the two-way screw two and quickly adjust the distance of the clamping block two.
[0021] As a further description of the above technical solution: the drive screw passes through the ear plate three and has a cross groove three at its end.
[0022] By adopting the above technical solution, a cross-slot three-adapter Phillips screwdriver can be made compatible, making it easy for operators to rotate the drive screw and quickly adjust the cross connector.
[0023] By employing the above technical solution, the quick positioning fixture for a cylinder head combustion chamber measuring machine of this utility model has at least the following beneficial effects: Compared with existing technologies, this cylinder head combustion chamber measuring machine's rapid positioning fixture, through the setting of clamping components, rotates a bidirectional lead screw one to drive two clamping blocks one to move relative to each other along a guide rod one, achieving front-to-back clamping of the cylinder head body; rotates a bidirectional lead screw two to drive two clamping blocks two to move relative to each other along a guide rod two, achieving left-to-right clamping; during the clamping process, roller one and roller two move slightly with the cylinder head body, automatically adjusting their position to the center of the mounting frame, achieving stable clamping and automatic centering of the cylinder head body, solving the problems of low accuracy and easy shaking caused by manual adjustment in existing technologies, and ensuring that the cylinder head body is accurately positioned directly above the measuring machine for detection without relying on human experience, thus improving detection accuracy and clamping stability.
[0024] Compared with existing technologies, this cylinder head combustion chamber testing machine features a rapid positioning fixture. By incorporating a lifting assembly, a rotating drive screw moves a movable lug along a guide rod, pushing the cross-connector frame to extend and retract, thereby causing the mounting frame to smoothly rise and fall along the guide post. The guide post and the sleeve block work together to ensure a stable lifting trajectory, while a baffle prevents the assembly from detaching. This achieves precise control over the cylinder head's lifting and lowering, solving the problems of existing technologies where height adjustment relies on shims, is cumbersome, and lacks fine-tuning capabilities. The testing height can be flexibly adjusted according to the thickness of different cylinder head models, ensuring the combustion chamber is fully within the testing machine's effective range while preventing collisions between the cylinder head and the testing machine, thus improving testing adaptability and safety. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of a rapid positioning tool for a cylinder head combustion chamber measuring machine proposed in this utility model; Figure 2 This is an enlarged structural diagram of a clamping component in a rapid positioning fixture for a cylinder head combustion chamber measuring machine proposed in this utility model. Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 for Figure 2 Enlarged structural diagram at point D; Figure 5 This is an enlarged structural diagram of a clamping component in a rapid positioning fixture for a cylinder head combustion chamber measuring machine proposed in this utility model. Figure 6 for Figure 4Enlarged structural diagram at point B; Figure 7 This is an enlarged structural diagram of the clamping component in the rapid positioning tooling for a cylinder head combustion chamber measuring machine proposed in this utility model; Figure 8 This is an enlarged structural schematic diagram of the lifting component in a rapid positioning fixture for a cylinder head combustion chamber measuring machine proposed in this utility model. Figure 9 for Figure 8 Enlarged schematic diagram of point C.
[0026] Legend: 1. Measuring machine body; 2. Support frame; 3. Mounting frame; 4. Clamping assembly; 401. Ear plate one; 402. Double-acting lead screw one; 403. Guide rod one; 404. Clamping block one; 405. Roller one; 406. Ear plate two; 407. Double-acting lead screw two; 408. Guide rod two; 409. Clamping block two; 410. Roller two; 411. Cross groove one; 412. Cross groove two; 413. Linear bearing; 5. Cylinder head body; 6. Lifting assembly; 601. Ear plate three; 602. Guide rod three; 603. Drive lead screw; 604. Moving ear plate; 605. Connecting block; 606. Cross connecting frame; 607. Guide column; 608. Sleeve block; 609. Baffle; 610. Cross groove three. Detailed Implementation
[0027] Reference Figure 1-9 This utility model provides a rapid positioning fixture for a cylinder head combustion chamber measuring machine: It includes a measuring machine body 1, which is the core device for detecting cylinder head combustion chamber parameters. The measuring machine body 1 has a contact or non-contact sensor on its top for collecting three-dimensional coordinate data of the combustion chamber. A support frame 2 is fixedly installed on the top of the measuring machine body 1. The support frame 2 is fixed to the periphery of the top detection area of the measuring machine body 1 with bolts, providing a stable installation foundation for the entire positioning fixture and preventing fixture displacement during the detection process from affecting accuracy. An installation frame 3 is installed on the top of the support frame 2. The installation frame 3 is a rectangular frame structure, and its internal space is adapted to accommodate different models of cylinder head bodies 5. It serves as the mounting carrier for the clamping assembly 4. The mounting frame 3 is equipped with a clamping assembly 4, which is used to clamp and fix the cylinder head body 5 from four directions: front, back, left, and right, and to automatically center it. The mounting frame 3 is equipped with a clamping assembly 4, and the cylinder head body 5 is fixedly installed inside the clamping assembly 4. The cylinder head body 5 is the workpiece to be tested, and its combustion chamber is set downwards. It needs to be precisely aligned with the sensor detection area of the measuring machine body 1. The clamping assembly 4 is fixedly installed inside the clamping assembly 4. A lifting assembly 6 is installed between the support frame 2 and the mounting frame 3. The lifting assembly 6 is used to drive the mounting frame 3 to move the cylinder head body 5 up and down, and adjust the distance between the combustion chamber and the measuring machine sensor. The lifting assembly 6 is installed between the support frame 2 and the mounting frame 3.
[0028] Reference Figures 2 to 7 The clamping assembly 4 includes a bidirectional lead screw 402 and a guide rod 403 located on the left and right sides of the inner wall of the mounting frame 3. Two symmetrical clamping blocks 404 are vertically sleeved on the bidirectional lead screw 402 and the guide rod 403. The bidirectional lead screw 402 is rotatably mounted on the mounting frame 3 and threadedly connected to the two clamping blocks 404. The guide rod 403 is fixedly mounted on the mounting frame 3 and slidably connected to the two clamping blocks 404. The rotation of the bidirectional lead screw 402 drives the two clamping blocks 404 to move towards each other or away from each other in a parallel direction.
[0029] Clamping assembly 4 also includes ear plates 401 and rollers 405. Two ear plates 401 are fixedly connected to the inner walls of the mounting frame 3 on both the left and right sides. The ear plates 401 are fixed to the inner walls of the mounting frame 3 by welding and are used to support the bidirectional lead screw 402 and the guide rod 403, ensuring that the two are installed in parallel and stable positions. The bidirectional lead screw 402 is movably installed inside the two ear plates 401 on the right side. The outer wall of the bidirectional lead screw 402 has two sections of threads with opposite directions of rotation. It is movably connected to the ear plates 401 through bearings and can rotate around its own axis. Its rotation can drive the two clamping blocks 404 to move synchronously relative to each other or in opposite directions. The two on the left side A guide rod 403 is fixedly connected between the two ear plates 401. The guide rod 403 is a cylindrical metal rod, arranged parallel to the double-acting screw 402, and is used to limit the movement direction of the clamping block 404, prevent the clamping block 404 from rotating with the double-acting screw 402, and ensure that it slides smoothly only in the front-back direction. A guide rod 403 is fixedly connected between the two ear plates 401 on the right side. Two symmetrically distributed clamping blocks 404 are sleeved on the outer wall of the double-acting screw 402 and the guide rod 403. A linear bearing 413 is provided inside the left end of the clamping block 404. The inner wall of the linear bearing 413 is flush with the guide rod 403. The outer walls fit together, reducing the friction at the left end during the synchronous clamping of the two clamping blocks 404, making the movement of the two clamping blocks 404 more stable. Each clamping block 404 has a threaded hole on its top that matches the bidirectional lead screw 402 and a smooth hole that matches the guide rod 403, allowing it to move along the guide rod 403 under the drive of the bidirectional lead screw 402. Two symmetrically distributed clamping blocks 404 are fitted onto the outer walls of the bidirectional lead screw 402 and the guide rod 403. The right end of each clamping block 404 is threadedly connected to the bidirectional lead screw 402, and the left end of each clamping block 404 is slidably connected to the guide rod 403. The rotational motion of the double-acting lead screw 402 is converted into the linear motion of the clamping block 404, ensuring smooth movement and controllable clamping force. The clamping block 404 is threadedly connected to the double-acting lead screw 402. Multiple rollers 405 are movably mounted on the opposite surfaces of the two clamping blocks 404. The rollers 405 are movably connected to the clamping blocks 404 through pins and can roll freely. When clamping the cylinder head body 5, it can reduce the friction with the outer wall of the cylinder head, allowing the cylinder head to move slightly to achieve automatic centering and avoid hard squeezing that damages the cylinder head surface. Multiple rollers 405 are movably mounted on the opposite surfaces of the two clamping blocks 404.
[0030] The clamping assembly 4 includes a bidirectional lead screw 407 and a guide rod 408 disposed on opposite sides of the inner wall of the mounting frame 3. Two symmetrical clamping blocks 409 are vertically sleeved on the bidirectional lead screw 407 and the guide rod 408. The bidirectional lead screw 407 is rotatably mounted on the mounting frame 3 and threadedly connected to the two clamping blocks 409. The guide rod 408 is fixedly mounted on the mounting frame 3 and slidably connected to the two clamping blocks 409. The rotation of the bidirectional lead screw 407 drives the two clamping blocks 409 to move towards or away from each other in a parallel direction.
[0031] Two ear plates 406 are fixedly connected to the front and rear sides of the inner wall of the mounting frame 3. The structure of the ear plates 406 is the same as that of the ear plates 401. They are used to support the double-acting screw 407 and the guide rod 408, and cooperate with the ear plates 401 to form a double-acting clamping structure. Two ear plates 406 are fixedly connected to the front and rear sides of the inner wall of the mounting frame 3. The double-acting screw 407 is movably installed inside the two ear plates 406 on the front side. The structure of the double-acting screw 407 is the same as that of the double-acting screw 402. The outer wall is provided with two sections of threads with opposite directions. Two clamping blocks 409 move synchronously relative to or in opposite directions to achieve left-right clamping adjustment. A bidirectional lead screw 407 is movably installed inside the two front ear plates 406. A guide rod 408 is fixedly connected between the two rear ear plates 406. The structure of the guide rod 408 is the same as that of the guide rod 403, and it is set parallel to the bidirectional lead screw 407 to limit the movement direction of the clamping blocks 409, ensuring that they slide smoothly only in the left-right direction. The bidirectional lead screw 407 and... Two symmetrically distributed clamping blocks 409 are fitted on the outer wall of the guide rod 408. The structure of the clamping blocks 409 is the same as that of the clamping block 404, and they are perpendicular to the clamping block 404. They clamp the cylinder head body 5 from the left and right directions, and work with the clamping block 404 to achieve all-round fixation. The outer walls of the double-acting screw 407 and the guide rod 408 are also fitted with two symmetrically distributed clamping blocks 409. The clamping blocks 409 are threadedly connected to the double-acting screw 407. The threaded connection ensures that the clamping blocks 409 move smoothly and can be precisely adjusted according to the cylinder head size. At the clamping position, clamping block 2 409 is threadedly connected to double-acting screw 2 407. A linear bearing 413 is provided inside the front end of clamping block 2 409. The inner wall of the linear bearing 413 fits against the outer wall of guide rod 2 408. Multiple rollers 2 410 are movably installed on the opposite surfaces of the two clamping blocks 2 409. The structure of rollers 2 410 is the same as that of roller 1 405. When clamping left and right, they assist the cylinder head body 5 in automatic centering, further improving the centering accuracy after clamping. Multiple rollers 2 410 are movably installed on the opposite surfaces of the two clamping blocks 2 409.
[0032] Reference Figures 8 to 9The lifting assembly 6 includes ear plate 3 601, guide rod 3 602, drive screw 603, movable ear plate 604, connecting block 605, and cross connecting frame 606. Two ear plates 3 601 are fixedly connected to the outer walls of both the support frame 2 and the mounting frame 3. The ear plates 3 601 are metal block structures, symmetrically distributed on the left and right sides of the support frame 2 and the mounting frame 3, used to install the guide rod 3 602 and the drive screw 603. Guide rods 3 602 are fixedly connected to the two ear plates 3 601 on the mounting frame 3. The guide rods 3 602 are cylindrical metal rods, horizontally fixed to the ear plates 3 601 on the mounting frame 3. Between the two ear plates 601 on the mounting frame 3, a guide rod 602 is fixedly connected to each other. A drive screw 603 is movably installed between the two ear plates 601 on the support frame 2. The drive screw 603 is movably connected to the ear plates 601 on the support frame 2 through a bearing. Its outer wall is provided with external threads, and one end extends to the outside of the support frame 2 for easy rotation operation. The drive screw 603 is movably installed between the two ear plates 601 on the support frame 2. A movable ear plate 604 is sleeved on the outer wall of the guide rod 602 and the drive screw 603. The movable ear plate 604 is a metal plate with a threaded hole adapted to the drive screw 603 and a threaded hole for the guide rod 602. The smooth hole 602 allows horizontal movement along the guide rod 602 when the drive screw 603 rotates. A movable ear plate 604 is fitted onto the outer wall of the guide rod 602 and the drive screw 603. The movable ear plate 604 is threadedly connected to the guide rod 602. Here, it should be the movable ear plate 604 that is threadedly connected to the drive screw 603. This threaded connection converts the rotational motion of the drive screw 603 into the linear motion of the movable ear plate 604, ensuring smooth movement and precise positioning. The outer walls of both the support frame 2 and the mounting frame 3 are fixedly connected with connecting blocks 605, which are metal protrusions corresponding to the ear plate 601. The cross-connector 606 is hinged at one end. The outer walls of the support frame 2 and the mounting frame 3 are both fixedly connected with connecting blocks 605. The cross-connector 606 is movably installed between the two movable ear plates 604 and the two connecting blocks 605. The cross-connector 606 is formed by two metal rods being hinged together. Both ends are hinged to the movable ear plates 604 and the connecting blocks 605 respectively. When the movable ear plates 604 move horizontally, the cross angle of the cross-connector 606 changes, thereby driving the mounting frame 3 to rise and fall. Its cross structure can evenly distribute the force and ensure that the mounting frame 3 rises and falls smoothly. The cross-connector 606 is movably installed between the two movable ear plates 604 and the two connecting blocks 605.
[0033] Reference Figures 8 to 9Multiple guide posts 607 are fixedly connected to the outer wall of the support frame 2. The guide posts 607 are vertically fixed at the four corners of the top of the support frame 2 to provide vertical guidance for the lifting and lowering of the mounting frame 3. Multiple sleeve blocks 608 are fixedly connected to the outer wall of the mounting frame 3. The sleeve blocks 608 are cylindrical sleeves that correspond to the guide posts 607 and are sleeved on the outer wall of the guide posts 607. They can slide up and down along the guide posts 607 to limit the movement trajectory of the mounting frame 3 and prevent deviation during lifting and lowering. Multiple sleeve blocks 608 are fixedly connected to the outer wall of the mounting frame 3. The guide posts 607 are located inside the corresponding sleeve blocks 608 to ensure that the mounting frame 3 always lifts and lowers in the vertical direction and avoids collision between the cylinder head body 5 and the measuring machine body 1.
[0034] Reference Figure 8 A baffle 609 is fixedly connected to the top of the guide post 607. The baffle 609 is a circular metal plate with a diameter larger than the inner diameter of the socket block 608. The baffle 609 is located on the top of the socket block 608 and is used to prevent the socket block 608 from detaching from the top of the guide post 607, thereby preventing the mounting frame 3 from rising excessively and causing the component to fall off, and improving the safety of the tooling.
[0035] Reference Figure 3 One end of the bidirectional lead screw 402 passes through the ear plate 401 and the mounting frame 3, and a cross groove 411 is provided at the end. The cross groove 411 is compatible with a standard Phillips screwdriver, which allows the operator to use a screwdriver to rotate the bidirectional lead screw 402 and quickly adjust the spacing of the clamping blocks 404. One end of the bidirectional lead screw 402 passes through the ear plate 401 and the mounting frame 3, and a cross groove 411 is provided at the end. A Phillips screwdriver or a hand drill can be used to hold the Phillips head and insert it into the cross groove 411 to drive the bidirectional lead screw 402 to rotate.
[0036] Reference Figure 6 One end of the bidirectional lead screw 407 passes through the ear plate 406 and the mounting frame 3 and has a cross groove 412 at the end. The structure of the cross groove 412 is the same as that of the cross groove 411. Using a Phillips screwdriver, it is easy for the operator to rotate the bidirectional lead screw 407 and adjust the spacing of the clamping blocks 409. One end of the bidirectional lead screw 407 passes through the ear plate 406 and the mounting frame 3 and has a cross groove 412 at the end, which enables quick adjustment of clamping in the left and right directions.
[0037] Reference Figure 9 The drive screw 603 passes through the ear plate 601 and has a cross groove 610 at its end, which allows the operator to use a screwdriver to rotate the drive screw 603 and quickly adjust the angle of the cross connector 606.
[0038] Working principle: The support frame 2 is fixed to the top of the detection area of the measuring machine body 1 with bolts, ensuring that the center of the support frame 2 is aligned with the detection center of the measuring machine sensor. The cylinder head body 5 to be tested is placed stably between the clamping block 1 404 and the clamping block 2 409 inside the mounting frame 3, ensuring that the combustion chamber of the cylinder head body 5 faces downwards, initially aligning with the detection area of the measuring machine body 1. At this time, both clamping block 1 404 and clamping block 2 409 are in the open state to avoid contact with the cylinder head body 5.
[0039] Take a Phillips screwdriver and insert it into the Phillips groove 411 at the end of the double-acting screw 402. Rotate the double-acting screw 402 clockwise. Since the right ends of the two clamping blocks 404 are threaded to the double-acting screw 402 and the left ends of the two clamping blocks 404 are sleeved on the guide rod 403, the double-acting screw 402 drives the two clamping blocks 404 to move synchronously towards the center along the guide rod 403 through the threaded transmission. The rollers 405 on the clamping blocks 404 gradually come into contact with the front and rear outer walls of the cylinder head body 5. Continue to rotate the double-acting screw 402 until the rollers 405 form a moderate clamping force on the cylinder head body 5.
[0040] Using a Phillips screwdriver, insert it into the Phillips groove 412 at the end of the double-ended lead screw 407. Rotate the double-ended lead screw 407 clockwise. The double-ended lead screw 407 drives the two clamping blocks 409 to move synchronously towards the center along the guide rod 408 through the threaded transmission. The rollers 410 on the clamping blocks 409 gradually come into contact with the left and right outer walls of the cylinder head body 5. Continue to rotate the double-ended lead screw 407 until the rollers 410 form a moderate clamping force on the cylinder head body 5. In conjunction with the clamping block 404, the cylinder head body 5 is fixed in all directions. The rolling of the rollers 410 will cause the cylinder head body 5 to automatically adjust to the center position in the left and right directions, so that the center of the cylinder head body 5 coincides with the center of the mounting frame 3, that is, it is precisely located directly above the detection area of the measuring machine body 1.
[0041] Using a Phillips screwdriver, insert it into the Phillips head slot at the end of the drive screw 603 and rotate the drive screw 603. The drive screw 603 drives the moving ear plate 604 to move along the guide rod 602 towards the center of the support frame 2 through threaded transmission. The moving ear plate 604 pushes the cross angle of the cross connecting bracket 606 to decrease, thereby driving the mounting frame 3 to descend smoothly along the guide post 607. At the same time, observe the display interface of the measuring machine body 1. When the combustion chamber of the cylinder head body 5 enters the effective detection range of the measuring machine sensor, stop rotating the drive screw 603 to complete the height adjustment.
[0042] Start the measuring machine body 1. The sensor detects the parameters of the combustion chamber of the cylinder head body 5 and collects three-dimensional coordinate data. After the detection is completed, rotate the drive screw 603 to drive the mounting frame 3 to the highest position. Rotate the first bidirectional screw 402 and the second bidirectional screw 407 respectively to open the clamping block 404 and the second clamping block 409. Take out the cylinder head body 5 after the detection is completed. Finally, reset the mounting frame 3 to the initial position and wait for the next detection.
[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A quick positioning fixture for a cylinder head combustion chamber measuring machine, comprising a measuring machine body (1), characterized in that: A support frame (2) is fixedly installed on the top of the measuring machine body (1), an installation frame (3) is installed on the top of the support frame (2), a clamping assembly (4) is installed inside the installation frame (3), a cylinder head body (5) is fixedly installed inside the clamping assembly (4), and a lifting assembly (6) is installed between the support frame (2) and the installation frame (3). The clamping assembly (4) includes a bidirectional lead screw (402) and a guide rod (403) disposed on the left and right sides of the inner wall of the mounting frame (3). The bidirectional lead screw (402) and the guide rod (403) are vertically fitted with two symmetrical clamping blocks (404). The bidirectional lead screw (402) is rotatably mounted on the mounting frame (3) and threadedly connected to the two clamping blocks (404). The guide rod (403) is fixedly mounted on the mounting frame (3) and slidably connected to the two clamping blocks (404). The bidirectional lead screw (402) rotates and drives the two clamping blocks (404) to move towards each other or away from each other in a parallel direction.
2. The rapid positioning fixture for a cylinder head combustion chamber measuring machine according to claim 1, characterized in that: The clamping assembly (4) further includes an ear plate (401) and a roller (405). Two ear plates (401) are fixedly connected to the left and right sides of the inner wall of the mounting frame (3). A two-way lead screw (402) is movably installed inside the two ear plates (401) on the right side. A guide rod (403) is fixedly connected between the two ear plates (401) on the left side. A linear bearing (413) is provided inside the left end of the clamping block (404). The inner wall of the linear bearing (413) is in contact with the outer wall of the guide rod (403). Multiple rollers (405) are movably installed on the opposite surfaces of the two clamping blocks (404).
3. The rapid positioning fixture for a cylinder head combustion chamber measuring machine according to claim 2, characterized in that: The clamping assembly (4) includes a two-way lead screw (407) and a guide rod (408) disposed on the front and rear sides of the inner wall of the mounting frame (3). The two-way lead screw (407) and the guide rod (408) are vertically fitted with two symmetrical clamping blocks (409). The two-way lead screw (407) is rotatably mounted on the mounting frame (3) and threadedly connected to the two clamping blocks (409). The guide rod (408) is fixedly mounted on the mounting frame (3) and slidably connected to the two clamping blocks (409). The rotation of the two-way lead screw (407) drives the two clamping blocks (409) to move towards each other or away from each other in a parallel direction.
4. The quick positioning fixture for a cylinder head combustion chamber measuring machine according to claim 3, characterized in that: The clamping assembly (4) further includes ear plate two (406) and roller two (410). Two ear plates two (406) are fixedly connected to the front and rear sides of the inner wall of the mounting frame (3). Two bidirectional lead screws two (407) are movably installed inside the two ear plates two (406) on the front side. A guide rod two (408) is fixedly connected between the two ear plates two (406) on the rear side. A linear bearing (413) is provided inside the front end of the clamping block two (409). The inner wall of the linear bearing (413) is in contact with the outer wall of the guide rod two (408). Multiple roller two (410) are movably installed on the opposite surfaces of the two clamping blocks two (409).
5. The rapid positioning fixture for a cylinder head combustion chamber measuring machine according to claim 1, characterized in that: The lifting assembly (6) includes ear plate three (601), guide rod three (602), drive screw (603), movable ear plate (604), connecting block (605) and cross connecting frame (606). The outer walls of the support frame (2) and the mounting frame (3) are fixedly connected to two ear plates three (601). The guide rod three (602) is fixedly connected to the two ear plates three (601) on the mounting frame (3). The drive screw (603) is movably installed between the two ear plates three (601) on the support frame (2). The movable ear plate (604) is sleeved on the outer wall of the guide rod three (602) and the drive screw (603). The movable ear plate (604) is threadedly connected to the guide rod three (602). The outer walls of the support frame (2) and the mounting frame (3) are fixedly connected to the connecting block (605). The cross connecting frame (606) is movably installed between the two movable ear plates (604) and the two connecting blocks (605).
6. The quick positioning fixture for a cylinder head combustion chamber measuring machine according to claim 1, characterized in that: The outer wall of the support frame (2) is fixedly connected with multiple guide posts (607), and the outer wall of the mounting frame (3) is fixedly connected with multiple socket blocks (608). The guide posts (607) are located inside the corresponding socket blocks (608).
7. The quick positioning fixture for a cylinder head combustion chamber measuring machine according to claim 4, characterized in that: A baffle (609) is fixedly connected to the top of the guide post (607), and the baffle (609) is located on the top of the sleeve block (608).
8. The rapid positioning fixture for a cylinder head combustion chamber measuring machine according to claim 1, characterized in that: One end of the bidirectional lead screw (402) passes through the ear plate (401) and the mounting frame (3) and has a cross groove (411) at the end.
9. The quick positioning fixture for a cylinder head combustion chamber measuring machine according to claim 2, characterized in that: One end of the bidirectional lead screw (407) passes through the ear plate (406) and the mounting frame (3) and has a cross groove (412) at the end.
10. The quick positioning fixture for a cylinder head combustion chamber measuring machine according to claim 3, characterized in that: The drive screw (603) passes through the ear plate three (601) and has a cross groove three (610) at its end.