Fixture for double-sided finish milling of engine cylinder cover

Abstract

The utility model provides a fixture for double-sided finish milling of an engine cylinder cover, which belongs to the field of engine cylinder cover fixtures and comprises a base, a rotating seat rotatably connected with the top of the base in an embedded manner, a fixing bolt penetrating through the top of the rotating seat, and a fixing mechanism arranged at the top of the rotating seat, the fixing mechanism can clamp and fix the engine cylinder cover; the locking mechanism is arranged on the fixing mechanism, the locking mechanism can lock the fixing mechanism, the clamping stability of the engine cylinder cover is improved, the fixing mechanism can clamp and fix the engine cylinder covers of different sizes through the fixing mechanism and the isosceles trapezoid-shaped groove body, and the fixing effect is improved; and meanwhile, the locking mechanism is arranged, the fixing mechanism can be locked, clamp looseness caused by vibration is effectively prevented, and the machining precision and stability are improved.

Description

Technical Field

[0001] This utility model relates to the field of engine cylinder head fixtures, and more specifically, to a fixture for double-sided precision milling of engine cylinder heads. Background Technology

[0002] The engine cylinder head is mounted on top of the cylinder block, sealing the cylinder from above and forming the combustion chamber. It is frequently in contact with high-temperature, high-pressure combustion gases, thus bearing significant thermal and mechanical loads. Double-sided precision milling fixtures play a crucial role in the machining field, especially in the double-sided precision milling of precision parts such as engine cylinder heads.

[0003] Currently, when performing double-sided precision milling on engine cylinder heads, a fixture is required to clamp and fix them. However, the milling cutter vibrates during precision milling. Most current fixtures use nuts and screws for locking, and prolonged vibration can cause the fixture to loosen, affecting clamping stability and causing workpiece displacement, which in turn affects machining quality. How to invent a fixture for double-sided precision milling of engine cylinder heads to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a fixture for double-sided precision milling of engine cylinder heads. It aims to improve the problem that most current fixtures rely on nuts and screws for locking, which can cause the fixture to loosen due to long-term vibration, affecting clamping stability, workpiece displacement, and thus affecting machining quality.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a fixture for double-sided precision milling of engine cylinder heads, including a base, a rotating seat rotatably connected to the top of the base, and a fixing bolt passing through the top of the rotating seat. It also includes: a fixing mechanism: the fixing mechanism is disposed on the top of the rotating seat, and the fixing mechanism can clamp and fix the engine cylinder head; and a locking mechanism: the locking mechanism is disposed on the fixing mechanism, and the locking mechanism can lock the fixing mechanism, improving the clamping stability of the engine cylinder head.

[0007] Preferably, the fixing mechanism includes a fixing seat on the top of the rotating seat, fixing blocks on both the left and right side walls of the fixing seat, lead screws on the top of both sets of fixing blocks, connecting blocks sleeved on both sets of lead screws, clamping seats on the opposite side walls of the two sets of connecting blocks, threaded blocks threaded to the outer walls of both sets of lead screws, and gripping rods on the top of both sets of threaded blocks.

[0008] Preferably, the top of the fixing seat and the bottom of the clamping seat are provided with grooves, the grooves are arranged in the shape of an isosceles trapezoid, and the inner walls of the two sets of grooves are provided with protective pads, which are made of rubber.

[0009] Preferably, the locking mechanism includes a sleeve on the top of the clamping seat, two sets of movable plates slidably connected inside the two sets of sleeves, airbags connected to the opposite sidewalls of the two sets of movable plates, an inflation tube at one end of each airbag, movable rods on the opposite sidewalls of the two sets of movable plates, a sliding plate slidably connected to the top of the clamping seat, one end of each set of movable rods passing through the left and right sidewalls of the sleeves and connecting to the opposite sidewalls of the two sets of sliding plates, a spring sleeved on the outer wall of each set of movable rods, multiple sets of first teeth on the opposite sidewalls of the two sets of sliding plates, and multiple sets of second teeth meshing with the first teeth on the outer wall of each set of threaded blocks.

[0010] Preferably, the inner rear sidewall of the sleeve is provided with a guide groove, and the rear sidewalls of both sets of movable plates are provided with guide blocks that match the guide groove.

[0011] Preferably, one end of each of the two sets of springs is connected to the sidewalls of the two sets of movable plates away from each other, and the other end of each of the two sets of springs is connected to the left and right sidewalls inside the sleeve.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, by setting a fixing mechanism, uses an isosceles trapezoidal groove to clamp and fix engine cylinder heads of different sizes, thereby improving the fixing effect; at the same time, a locking mechanism is set to lock the fixing mechanism, effectively preventing the fixture from loosening due to vibration, and improving processing accuracy and stability.

[0014] 2. This utility model has a rubber protective pad on the inner wall of the groove, which can prevent scratches on the surface of the engine cylinder head, protect the engine cylinder head from damage during fixing, and also has a certain cushioning effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a utility model Figure 1Enlarged view of the structure at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the locking mechanism of this utility model.

[0019] In the diagram: 1. Base; 2. Rotating seat; 3. Fixing bolt; 4. Fixing mechanism; 400. Fixing seat; 401. Clamping seat; 402. Fixing block; 403. Protective pad; 404. Lead screw; 405. Connecting block; 406. Threaded block; 407. Handle; 5. Locking mechanism; 500. Sliding plate; 501. First tooth; 502. Second tooth; 503. Sleeve; 504. Movable plate; 505. Airbag; 506. Inflation tube; 507. Spring; 508. Movable rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example, refer to Figures 1-3 A jig for double-sided precision milling of engine cylinder heads includes a base 1, a rotating seat 2 rotatably connected to the top of the base 1, and a fixing bolt 3 passing through the top of the rotating seat 2. Rotation of the rotating seat 2 can drive a fixing mechanism 4 to rotate 360 ​​degrees, facilitating adjustment of the machining angle. The fixing bolt 3 is used to fix the rotating seat 2 after the selected angle. The jig also includes: a fixing mechanism 4: the fixing mechanism 4 is disposed on the top of the rotating seat 2, and the fixing mechanism 4 can clamp and fix the engine cylinder head; and a locking mechanism 5: the locking mechanism 5 is disposed on the fixing mechanism 4, and the locking mechanism 5 can lock the fixing mechanism 4 to improve the clamping stability of the engine cylinder head.

[0022] The fixing mechanism 4 includes a fixing seat 400 on the top of the rotating seat 2. The fixing seat 400 has fixing blocks 402 on both the left and right side walls. The top of each of the two sets of fixing blocks 402 is provided with a lead screw 404. The two sets of lead screws 404 are sleeved with connecting blocks 405. The two sets of connecting blocks 405 have clamping seats 401 on opposite side walls. The top of the fixing seat 400 and the bottom of the clamping seats 401 are provided with grooves. The grooves are set in the shape of an isosceles trapezoid to accommodate engine cylinder heads of different sizes and improve the clamping effect. The inner walls of the two sets of grooves are provided with protective pads 403. The protective pads 403 are made of rubber to protect the engine cylinder head when clamping and fixing it. The outer walls of the two sets of lead screws 404 are threaded with threaded blocks 406. The top of the two sets of threaded blocks 406 is provided with a handle 407.

[0023] It should be noted that: the threaded block 406 is positioned above the connecting block 405, the connecting block 405 moves up and down on the outer wall of the lead screw 404, and the clamping seat 401 is positioned opposite to the fixed seat 400 to form a clamping space. The isosceles trapezoidal groove can fix engine cylinder heads of different sizes, and the inner wall of the groove is provided with a rubber protective pad 403 to prevent the cylinder head surface from being scratched.

[0024] The locking mechanism 5 includes a sleeve 503 on the top of the clamping seat 401. Two sets of movable plates 504 are slidably connected inside the two sets of sleeves 503. A guide groove is provided on the rear side wall of the sleeve 503. A guide block matching the guide groove is provided on the rear side wall of each set of movable plates 504. Under the action of the guide groove and the guide block, the movable plates 504 move more stably within the sleeves 503. An airbag 505 is connected to the opposite side wall of the two sets of movable plates 504. An inflation tube 506 is provided at one end of the airbag 505. Movable rods 508 are provided on the opposite side wall of each set of movable plates 504. The top of the clamping seat 401 slides... The moving connection is provided with a sliding plate 500. One end of each of the two sets of movable rods 508 passes through the left and right side walls of the sleeve 503 and is connected to the opposite side walls of the two sets of sliding plates 500. Springs 507 are sleeved on the outer walls of the two sets of movable rods 508. One end of each set of springs 507 is connected to the opposite side wall of the two sets of movable plates 504. The other end of each set of springs 507 is connected to the left and right side walls of the sleeve 503. Multiple sets of first teeth 501 are provided on the opposite side walls of the two sets of sliding plates 500. Multiple sets of second teeth 502 that mesh with the first teeth 501 are provided on the outer walls of the two sets of threaded blocks 406.

[0025] It should be noted that: by inflating the airbag 505, the movable plate 504 is moved. The movable plate 504 pushes the sliding plate 500 to move through the movable rod 508, so that the first tooth 501 and the second tooth 502 mesh, locking the threaded block 406 and preventing it from loosening due to vibration.

[0026] Working principle: Place the cylinder head that needs double-sided precision milling on the fixed seat 400, then rotate the handle 407 to drive the threaded block 407 to move on the lead screw 406. Through the connecting block 405, push the clamping seat 401 to move towards the fixed seat 400 to clamp the cylinder head. After the cylinder head is clamped, the external air compressor inflates the air bag 505 through the air inflator 506, causing the air bag 505 to expand. The expansion of the air bag 505 pushes the movable plate 504 to slide, thereby the movable rod 508 pushes the sliding plate 500 to move. The movement of the sliding plate 500 causes the first tooth 501 to mesh with the second tooth 502 on the outer side wall of the threaded block 406, locking the threaded block 406 to prevent it from loosening due to vibration and improving the clamping effect on the cylinder head.

[0027] When unlocking is required, the gas inside the airbag 505 is released through the inflation tube 506, the airbag 505 contracts, the movable plate 504 is reset under the action of the spring 507, the sliding plate 500 is also reset, the first tooth 501 and the second tooth 502 disengage, the grip 407 is rotated, the threaded block 406 moves in the opposite direction on the lead screw 404, and the clamping seat 401 releases the cylinder head.

[0028] It should be noted that the specific model and specifications need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixture for double-sided precision milling of engine cylinder heads, comprising a base (1), characterized in that, The base (1) has a rotating seat (2) embedded in its top, which is rotatably connected. A fixing bolt (3) passes through the top of the rotating seat (2). The base also includes: Fixing mechanism (4): The fixing mechanism (4) is set on the top of the rotating seat (2), and the fixing mechanism (4) can clamp and fix the engine cylinder head; Locking mechanism (5): The locking mechanism (5) is set on the fixing mechanism (4). The locking mechanism (5) can lock the fixing mechanism (4) and improve the clamping stability of the engine cylinder head.

2. The fixture for double-sided precision milling of engine cylinder heads according to claim 1, characterized in that, The fixing mechanism (4) includes a fixing seat (400) provided on the top of the rotating seat (2). The fixing seat (400) has fixing blocks (402) on both the left and right side walls. The top of the two sets of fixing blocks (402) is provided with lead screws (404). The two sets of lead screws (404) are sleeved with connecting blocks (405). The two sets of connecting blocks (405) have clamping seats (401) on opposite side walls. The outer walls of the two sets of lead screws (404) are threaded with threaded blocks (406). The top of the two sets of threaded blocks (406) is provided with a handle (407).

3. A fixture for double-sided precision milling of engine cylinder heads according to claim 2, characterized in that, The top of the fixed seat (400) and the bottom of the clamping seat (401) are both provided with grooves. The grooves are arranged in the shape of an isosceles trapezoid. The inner walls of the two sets of grooves are provided with protective pads (403), which are made of rubber.

4. A fixture for double-sided precision milling of engine cylinder heads according to claim 2, characterized in that, The locking mechanism (5) includes a sleeve (503) on the top of the clamping seat (401), two sets of movable plates (504) slidably connected inside the two sets of sleeves (503), airbags (505) connected to the opposite side walls of the two sets of movable plates (504), an inflation tube (506) at one end of the airbag (505), and movable rods (508) on the opposite side walls of the two sets of movable plates (504). A sliding rod is slidably connected to the top of the clamping seat (401). The movable plate (500) has one end of each of the two sets of movable rods (508) passing through the left and right side walls of the sleeve (503) and connected to the opposite side walls of the two sets of sliding plates (500). The outer walls of the two sets of movable rods (508) are fitted with springs (507). The opposite side walls of the two sets of sliding plates (500) are provided with multiple sets of first teeth (501). The outer walls of the two sets of threaded blocks (406) are provided with multiple sets of second teeth (502) that mesh with the first teeth (501).

5. A fixture for double-sided precision milling of engine cylinder heads according to claim 1, characterized in that, The sleeve (503) has a guide groove on its inner rear side wall, and the two sets of movable plates (504) have guide blocks on their rear side walls that match the guide groove.

6. A fixture for double-sided precision milling of engine cylinder heads according to claim 1, characterized in that, One end of each of the two sets of springs (507) is connected to the opposite sidewall of each of the two sets of movable plates (504), and the other end of each of the two sets of springs (507) is connected to the left and right sidewalls inside the sleeve (503).

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