High efficiency assembly positioning device for engine block head assembly

Abstract

The application discloses a high-efficiency assembly positioning device for an engine cylinder head assembly, which comprises a fixing part used for mounting the positioning device on a workbench, a top of the fixing part is provided with a connecting groove, a positioning part used for mounting a positioning pin, a bottom of the positioning part is provided with a connecting part, the connecting part is movably inserted into the connecting groove and can move along an adjusting direction, an adjusting device arranged at two ends of the fixing part, the adjusting device comprises an adjusting bolt and an adjusting wedge, the adjusting wedge is provided with a working inclined surface used for cooperating with the connecting part, the adjusting bolt is used for driving the adjusting wedge to move, thereby driving the connecting part to move, and an elastic pre-tightening device fixedly arranged on the fixing part and used for applying a continuous downward force to the positioning part, so that the positioning part can always cooperate with the adjusting wedge.

Description

Technical Field

[0001] This application relates to the field of engine cylinder head processing technology, and in particular to a high-efficiency assembly and positioning device for engine block and cylinder head assemblies. Background Technology

[0002] In the engine cylinder head assembly line, a positioning surface consisting of four positioning blocks, along with round pins and diamond pins, is used for positioning the cylinder head. The round pins and diamond pins are positioning pins, which are installed on two of the positioning blocks and fixed with set screws. To prevent the positioning pins from deviating after prolonged use, positioning components and engine cylinder head positioning devices, as proposed in announcement number CN208601111U, employ an adjustable positioning structure to adjust the positioning dimensions and avoid the "edge chipping" phenomenon caused by the positioning pins shifting, thereby reducing the scrap rate on site. However, the bolts directly press against the friction surface, which is prone to loosening under strong vibration and impact conditions, leading to the loss of the adjusted precision. At the same time, a large number of bolts are required to ensure the stability of the bolts supporting the first boss. Therefore, the purpose of this application is to prevent the bolts from directly acting on the positioning components and to prevent the positioning pins from shifting.

[0003] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0004] Based on this, this application provides a high-efficiency assembly and positioning device for engine block and cylinder head assemblies to solve one of the aforementioned technical problems.

[0005] The technical solution adopted by this application to solve its technical problem is a high-efficiency assembly and positioning device for engine cylinder block and cylinder head assembly, comprising: a fixing member for mounting the positioning device on a workbench, the top of the fixing member having a connecting groove; a positioning member for installing a positioning pin, the bottom of the positioning member having a connecting part, the connecting part being movably inserted into the connecting groove and movable along the adjustment direction; an adjustment device disposed at both ends of the fixing member, the adjustment device including an adjusting bolt and an adjusting wedge, the adjusting wedge having a working inclined surface for engaging with the connected part, the adjusting bolt for driving the adjusting wedge to move, thereby driving the connected part to move; and an elastic pre-tightening device fixedly disposed on the fixing member for applying a continuous downward force to the positioning member, so that the positioning member can always engage with the adjusting wedge.

[0006] In some embodiments, a fixing plate is installed at the bottom of the fixing member, and the fixing plate has mounting holes to fix the fixing plate on the workbench.

[0007] In some embodiments, the elastic preload device is disposed at both ends of the top of the fixing member, and includes a spring seat in the shape of an L, with a spring rod extending downward from a horizontal side of the spring seat, and multiple sets of disc springs sleeved on the spring rod.

[0008] In some embodiments, a sliding plate is slidably disposed on the positioning member, the sliding plate having an abutment hole to cooperate with the spring rod, and the sliding plate being abutted by a disc spring.

[0009] In some embodiments, the connecting portion has a mating inclined surface that mates with the working inclined surface.

[0010] In some embodiments, the end profile of the connector is T-shaped, and the inner profile of the connecting groove is T-shaped to mate with the end of the connector.

[0011] In some embodiments, the slope angle of the working ramp is in the range of 30-70°.

[0012] The beneficial effects of this application are as follows: the positioning component is always pressed by the elastic pre-tightening device until the adjusting wedge drives the positioning component to move. Even if one of the adjusting bolts becomes loose, the elastic pre-tightening device can ensure that the positioning component will not shake, so that the positioning component can maintain stable positioning accuracy in a vibration environment. Moreover, the end of the bolt will not directly act on the connection part. At the same time, the locking of the positioning component can be completed with only two adjusting bolts. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of this application.

[0015] Figure 2 This is a schematic diagram of the positioning element in this application.

[0016] Figure 3 This is a cross-sectional view of the adjusting wedge at a 45° slope angle according to this application.

[0017] Figure 4 This is a cross-sectional view of the adjusting wedge at a 65° slope angle according to this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Fixing component; 11. Connecting groove; 12. Fixing plate; 121. Mounting hole; 2. Positioning component; 21. Connecting part; 211. Mating inclined surface; 22. Sliding plate; 221. Abutment hole; 3. Adjusting device; 31. Adjusting bolt; 32. Adjusting wedge; 321. Working inclined surface; 4. Elastic pre-tightening device; 41. Spring seat; 42. Spring rod; 43. Disc spring. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0020] In the embodiments of this application, please refer to Figure 1-4 As shown, this application provides a high-efficiency assembly positioning device for engine block and cylinder head assembly, mainly comprising: a fixing member 1 for mounting the positioning device on a workbench, wherein the top of the fixing member 1 is provided with a connecting groove 11; a positioning member 2 for installing a positioning pin, wherein the bottom of the positioning member 2 is provided with a connecting part 21, the connecting part 21 being movably inserted into the connecting groove 11 and movable along the adjustment direction; an adjustment device 3 disposed at both ends of the fixing member 1, wherein the adjustment device 3 includes an adjustment bolt 31 and an adjustment wedge 32, wherein the adjustment wedge 32 has a working inclined surface 321, the working inclined surface 321 being used to cooperate with the connected part 21, the adjustment bolt 31 being used to drive the adjustment wedge 32 to move, thereby driving the connected part 21 to move; and an elastic pre-tightening device 4 fixedly disposed on the fixing member 1 for applying a continuous downward force to the positioning member 2, so that the positioning member 2 can always cooperate with the adjustment wedge 32.

[0021] Specifically, by rotating the adjusting bolts 31 at both ends, the adjusting wedge 32 is driven to move laterally. With the help of the working inclined surface 321, the lateral force is converted into the longitudinal or lateral adjustment force of the connecting part 21, providing a more flexible adjustment space and enabling precise position adjustment of the positioning part 2. The elastic pre-tightening device 4 ensures that the inclined surface fits without gaps, and the positioning pin is locked by the position of the positioning part 2, realizing high-precision assembly positioning of the engine block and cylinder head assembly.

[0022] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0023] Specifically, in order to stably set the fastener 1 on the workbench, a fixing plate 12 is installed at the bottom of the fastener 1, and the fixing plate 12 is provided with mounting holes 121 to fix the fixing plate 12 on the workbench.

[0024] Reference Figure 1 As shown, the elastic preload device 4 is located at both ends of the top of the fixing member 1. It includes a spring seat 41, which is L-shaped. A spring rod 42 extends downward from the horizontal side of the spring seat 41. Multiple sets of disc springs 43 are sleeved on the spring rod 42. Each spring rod 42 is sleeved with 4-8 sets of stacked disc springs 43. Each set consists of 2 disc springs 43 interlocked. Compared with cylindrical springs, it has better fatigue resistance and stable preload. Even after long-term use, the positioning accuracy will not decrease due to spring relaxation.

[0025] Preferably, in order to ensure that the positioning member 2 does not affect the cooperation with the elastic pre-tightening device 4 when moving horizontally, a sliding plate 22 is slidably provided on the positioning member 2. The sliding plate 22 has an abutment hole 221 to cooperate with the spring rod 42 and is abutted by the disc spring 43. The lower end of the disc spring 43 abuts against the upper surface of the sliding plate 22. The pre-tightening force is evenly transmitted to the positioning member 2 through the sliding plate 22, ensuring that the positioning member 2 is under balanced force and that the connecting part 21 and the adjusting wedge 32 fit more tightly.

[0026] Preferably, the connecting part 21 has a mating slope 211 that mates with the working slope 321. The slope of the mating slope 211 is consistent with that of the working slope 321 to ensure that the force is transmitted without loss during adjustment.

[0027] Specifically, the end profile of the connecting part 21 is T-shaped, and the inner profile of the connecting groove 11 is T-shaped to cooperate with the end of the connecting part 21. The T-shaped structure can limit the displacement of the positioning member 2 in the vertical direction.

[0028] Reference Figure 3-4 As shown, the slope angle of the working inclined plane 321 ranges from 30° to 70°. The ratio of the lateral driving force of the adjusting bolt 31 to the longitudinal adjusting force of the connecting part 21 is adjusted according to the slope angle. Figure 3 As shown, its slope angle is 45 degrees. The smaller the angle, the easier it is for the adjusting bolt 31 to convert the lateral driving force into the longitudinal adjusting force of the connecting part 21. Figure 4As shown, its slope angle is 65°. The larger the slope angle (the limit is 90°. When the slope is greater than 70°, under the action of the elastic pre-tightening device 4, the longitudinal adjustment force is almost non-existent, and only an equal amount of lateral adjustment force remains), the more difficult it is for the lateral adjustment force on the adjusting wedge block 32 to be converted into the longitudinal adjustment force of the connecting part 21.

[0029] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A high-efficiency assembly and positioning device for engine block and cylinder head assemblies, characterized in that, include: A fastener is used to mount the positioning device on the worktable, and the top of the fastener has a connecting groove. A positioning component for installing a positioning pin, wherein the bottom of the positioning component is provided with a connecting part, the connecting part is movably inserted into the connecting groove and can move along the adjustment direction; An adjustment device is provided at both ends of the fixing member. The adjustment device includes an adjustment bolt and an adjustment wedge. The adjustment wedge has a working inclined surface, which is used to cooperate with the connected part. The adjustment bolt is used to drive the adjustment wedge to move, thereby driving the connected part to move. An elastic pre-tightening device is fixedly mounted on the fixing member and is used to apply a continuous downward force to the positioning member so that the positioning member can always cooperate with the adjusting wedge.

2. The high-efficiency assembly and positioning device for engine block and cylinder head assembly according to claim 1, characterized in that, The bottom of the fastener is equipped with a fixing plate, and the fixing plate has mounting holes to fix the fixing plate on the workbench.

3. The high-efficiency assembly and positioning device for engine block and cylinder head assembly according to claim 1, characterized in that, The elastic preload device is located at both ends of the top of the fixing member. It includes a spring seat, which is L-shaped. A spring rod extends downward from the horizontal side of the spring seat, and multiple disc springs are sleeved on the spring rod.

4. The high-efficiency assembly and positioning device for engine block and cylinder head assembly according to claim 3, characterized in that, A sliding plate is slidably disposed on the positioning member. The sliding plate has an abutment hole to cooperate with the spring rod, and the sliding plate is abutted by a disc spring.

5. The high-efficiency assembly and positioning device for engine block and cylinder head assembly according to claim 1, characterized in that, The connecting part has a mating inclined surface that mates with the working inclined surface.

6. The high-efficiency assembly and positioning device for engine block and cylinder head assembly according to claim 1, characterized in that, The end profile of the connecting part is T-shaped, and the inner profile of the connecting groove is T-shaped to match the end of the connecting part.

7. The high-efficiency assembly and positioning device for engine block and cylinder head assembly according to claim 1, characterized in that, The slope angle of the working inclined plane is in the range of 30-70°.

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