Engine cylinder cover fixing device

Abstract

The utility model belongs to the technical field of engine manufacturing, and particularly discloses an engine cylinder cover fixing device which comprises a connecting plate, the connecting plate is provided with a positioning portion and a connecting portion, the connecting plate is detachably connected with a cylinder cover through the connecting portion, and the positioning portion is provided with a positioning assembly connected with the cylinder cover. The tightening machine is connected with the connecting part, a driving piece is arranged on the side, away from the connecting plate, of the tightening machine, the connecting plate can be driven by the tightening machine to be close to or away from the cylinder cover, and the tightening machine is provided with a plurality of tightening shafts used for tightening the connecting bolts; when the connecting piece is connected with the positioning hole, the tightening shaft and the corresponding connecting bolt are located at the coaxial position, and the engine cylinder cover tightening device is used for solving the problem that in the prior art, when an engine cylinder cover is tightened, an engine shakes, and consequently the cylinder cover and a cylinder body are not tightened firmly.

Description

Technical Field

[0001] The utility model relates to the technical field of engine manufacturing, in particular to a fixing device for an engine cylinder cover. Background Art

[0002] During the engine manufacturing process, the engine cylinder head needs to be connected to the cylinder body. During this process, a multi-head tightening machine is mainly used to tighten the connecting bolts by the angle method. The working principle of the tightening machine is to use a servo motor as a power unit, connect a reduction mechanism, increase the output torque, and connect a torque sensor to detect the torque. The torque sensor and the servo motor form a closed-loop control, which can accurately control the output torque, angle, number of turns and other parameters.

[0003] In the prior art, during the tightening process using a tightening machine, it is necessary to ensure that the tightening shaft of the tightening machine and the connecting bolt are in a vertical relative static position. In fact, during the tightening process of the tightening machine, especially when the tightening shaft is rotating and twisting, the engine will shake slightly irregularly, and the tightening shaft of the tightening machine will shake at the same time, which will affect the tightening result. The cylinder head and the cylinder body are not firmly connected. When the shaking is large, the tightening sleeve connected to the tightening shaft is at risk of breaking. In view of this, the inventor proposed an engine cylinder head fixing device. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an engine cylinder head fixing device for solving the problem in the prior art that the cylinder head and the cylinder body are not firmly tightened due to engine shaking during the tightening of the engine cylinder head.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides an engine cylinder head fixing device for connecting the engine cylinder head and the cylinder body, wherein the cylinder head and the cylinder body are connected by connecting bolts, and is characterized in that the cylinder head tightening device comprises:

[0006] A connecting plate, the connecting plate having a positioning portion and a connecting portion, the connecting plate being detachably connected to the cylinder head via the connecting portion, and the positioning portion being provided with a positioning assembly connected to the cylinder head;

[0007] A tightening machine, the tightening machine is connected to the connecting part, a driving member is provided on a side of the tightening machine away from the connecting plate, the connecting plate can be driven by the tightening machine to approach or move away from the cylinder head, and the tightening machine is provided with a plurality of tightening shafts for tightening the connecting bolts;

[0008] Wherein, when the connecting plate is connected to the positioning hole, the tightening shaft and the corresponding connecting bolt are in a coaxial position.

[0009] Optionally, a connecting block is fixedly connected to the positioning portion, the number of the positioning components is at least two, the positioning component includes a positioning block and a positioning bolt, the positioning block is detachably connected to the connecting block, and the positioning portion is connected to the cylinder head via the positioning bolt.

[0010] Optionally, a fixing rod is provided on the tightening machine, a plurality of fixing components are provided on the connecting portion, and the fixing rod is connected to the fixing components.

[0011] Optionally, the fixing assembly includes a fixing seat and a fixing bolt, the fixing seat is detachably connected to the connecting portion, a fixing sleeve is integrally formed on the fixing seat, and the fixing rod passes through the fixing sleeve and is connected to the connecting portion via the fixing bolt.

[0012] Optionally, a pre-installation component is further included, the pre-installation component includes a base detachably connected to the positioning portion and a positioning sleeve integrally formed on the base, the cylinder head has a positioning rod, and the positioning rod is slidably connected to the positioning sleeve.

[0013] Optionally, the driving member is an adjusting cylinder, the protruding end of the adjusting cylinder is connected to the tightening machine, and the adjusting cylinder can drive the tightening machine to move so as to drive the connecting plate to move closer to or away from the cylinder cover.

[0014] Optionally, a first reinforcing rib and a second reinforcing rib are respectively provided on the positioning portion and the connecting portion.

[0015] Optionally, a sleeve is detachably connected to the free end of the tightening shaft, and an adapting hole matching with the connecting bolt is formed at one end of the sleeve close to the cylinder head to drive the connecting bolt to rotate.

[0016] Optionally, the number of the tightening shafts is eighteen, and the positions of the tightening shafts correspond one-to-one to the positions of the connecting bolts.

[0017] Optionally, weight-reducing grooves are symmetrically provided on the connection plate.

[0018] As described above, the engine cylinder head fixing device proposed by the utility model has the following beneficial effects:

[0019] (1) In the utility model, a connecting plate is provided, and the positioning portion and the connecting portion of the connecting plate can be connected to the cylinder head and the tightening machine respectively, so that the tightening shaft can be positioned during the tightening process of the tightening machine, so that the tightening shaft and the connecting bolt are always located on the same axis during the tightening process. At the same time, through the connecting effect of the connecting plate, the tightening machine is integrated with the cylinder head during the actual working process, thereby reducing the influence of the engine vibration on the tightening result, and ensuring the firmness of the connection between the cylinder head and the cylinder body.

[0020] (2) In the utility model, the connecting plate is provided to serve as an intermediate carrier for fixing the cylinder head and the tightening machine to each other, thereby enhancing the stability of the sleeve during tightening, reducing the influence of the engine vibration on the sleeve, and extending the service life of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic diagram of an embodiment of the utility model;

[0022] Figure 2 Shown is a front view of a connecting plate in one embodiment of the utility model;

[0023] Figure 3 Shown is a top view of a connecting plate in one embodiment of the utility model;

[0024] Figure 4 Shown is an enlarged view of point A in one embodiment of the utility model;

[0025] Figure 5 Shown is an enlarged view of point B in an embodiment of the utility model;

[0026] Figure 6 Shown is a schematic diagram of a fixing assembly in one embodiment of the present invention.

[0027] Description of reference numerals:

[0028] Connecting plate 1, positioning part 101, connecting part 102, connecting block 103, weight reduction groove 104, positioning assembly 2, positioning block 201, positioning screw 202, positioning bolt 203, fixing bolt 3, fixing assembly 4, fixing seat 401, fixing screw 402, fixing sleeve 403, tightening machine 5, fixing rod 501, tightening shaft 6, sleeve 7, adjusting cylinder 8, cylinder head 9, positioning rod 901, connecting bolt 10, pre-installation assembly 11, positioning sleeve 1101, connecting screw 1102, frame 12. DETAILED DESCRIPTION

[0029] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] It should be noted that the diagrams provided in the present embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be changed at will, and the layout of the components may be more complicated. The structure, proportion, size, etc. shown in the diagrams attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0031] The utility model provides an engine cylinder head fixing device, which is used for connecting a cylinder head 9 and a cylinder body of an engine, wherein the cylinder head 9 and the cylinder body are connected by connecting bolts 10.

[0032] In an exemplary embodiment, the engine cylinder head 9 fixing device includes:

[0033] A connecting plate 1, wherein the connecting plate 1 has a positioning portion 101 and a connecting portion 102, the connecting plate 1 is detachably connected to the cylinder head 9 via the connecting portion 102, and a positioning assembly 2 connected to the cylinder head 9 is provided on the positioning portion 101;

[0034] A tightening machine 5, which is connected to the connecting portion 102, and a driving member is provided on a side of the tightening machine 5 away from the connecting plate 1. The connecting plate 1 can be driven by the tightening machine 5 to move closer to or away from the cylinder head 9. The tightening machine 5 is provided with a plurality of tightening shafts 6 for tightening the connecting bolts 10;

[0035] When the connecting plate 1 is connected to the positioning hole, the tightening shaft 6 and the corresponding connecting bolt 10 are in a coaxial position.

[0036] In this embodiment, a connecting plate 1 is provided, and the positioning portion 101 and the connecting portion 102 of the connecting plate 1 are respectively connected to the cylinder head 9 and the tightening machine 5, so that the tightening shaft 6 can be positioned during the tightening process of the tightening machine 5, so that the tightening shaft 6 and the connecting bolt 10 are always located on the same axis during the tightening process, thereby reducing the influence of engine vibration on the tightening result, and ensuring the firmness of the connection between the cylinder head 9 and the cylinder body. At the same time, the provided connecting plate 1 becomes an intermediate piece, so that the tightening machine 5 becomes one with the cylinder head 9 during the actual working process, thereby enhancing the stability of the sleeve 7 when the tightening machine 5 is working, reducing the influence of the engine vibration on the sleeve 7, and extending the service life of the sleeve 7.

[0037] In an exemplary embodiment, a connecting block 103 is fixedly connected to the positioning portion 101, the number of positioning assemblies 2 is at least two, the positioning assembly 2 includes a positioning block 201 and a positioning bolt 203, the positioning block 201 and the connecting block 103 are detachably connected, and the positioning portion 101 is connected to the cylinder head 9 via the positioning bolt 203.

[0038] In this embodiment, by means of the positioning component 2 and the connecting block 103 arranged on the positioning portion 101, the connecting plate 1 can be connected to the positioning hole through the positioning component 2, thereby realizing the connection between the connecting plate 1 and the cylinder body. At the same time, in this embodiment, after the positioning component 2 and the positioning hole are fixed, the tightening shaft 6 and its corresponding connecting bolt 10 are in a coaxial position in the vertical direction, which is convenient for tightening work.

[0039] Illustratively, in this embodiment, the number of the positioning holes is two, which are symmetrically arranged on the cylinder head 9, and the number of the positioning components 2 is also two, which correspond one-to-one to the positioning holes, so as to facilitate the connection between the positioning components 2 and the positioning holes.

[0040] Exemplarily, the positioning block 201 is mounted on the connecting block 103 by two positioning screws 202 , which facilitates the installation of the positioning screws 203 .

[0041] Illustratively, in this embodiment, the number of the connecting bolts 10 is eighteen, and the number of the tightening shafts 6 corresponding to the connecting bolts 10 is also eighteen, and their positions also correspond to the connecting bolts 10.

[0042] It is worth noting that in this embodiment, during the engine production process, the engine is located on the production line and moves to the bottom of the tightening machine 5. At the position where the positioning hole corresponds to the positioning component 2, the engine stops and the connecting plate 1 is connected to the positioning hole.

[0043] It should also be noted that in this embodiment, the number of tightening shafts 6 is determined according to the number of connecting bolts 10. Different models of tightening machines 5 can be selected according to the number of connecting bolts 10 to increase or decrease the number of tightening shafts 6. The tightening machine 5 adopts a multi-axis tightening machine, which is the existing technology.

[0044] In an exemplary embodiment, a fixing rod 501 is provided on the tightening machine 5 , a plurality of fixing assemblies 4 are provided on the connecting portion 102 , and the fixing rod 501 is connected to the fixing assemblies 4 .

[0045] In this embodiment, the connection plate 1 can be fixed on the tightening machine 5 by means of the fixing assembly 4 , so that the connection plate 1 can move along with the tightening machine 5 .

[0046] Exemplarily, the fixing assembly 4 includes a fixing seat 401 and a fixing bolt 3 . The fixing seat 401 is detachably connected to the connecting portion 102 . A fixing sleeve 403 is integrally formed on the fixing seat 401 . The fixing rod 501 passes through the fixing sleeve 403 and is connected to the connecting portion 102 via the fixing bolt 3 .

[0047] Illustratively, in this embodiment, the connecting rod can be welded, screwed, etc. after entering the fixing sleeve 403 to ensure that the connecting plate 1 is connected to the tightening machine 5. Illustratively, the fixing seat 401 in this embodiment is installed on the connecting part 102 by four fixing screws 402.

[0048] In an exemplary embodiment, the utility model also includes a pre-installation component 11, which includes a base detachably connected to the positioning portion 101 and a positioning sleeve 1101 integrally formed on the base. The cylinder head 9 has a positioning rod 901, which is slidably connected to the positioning sleeve 1101.

[0049] In this embodiment, by setting up the pre-installation component 11, the placement position of the connecting plate 1 can be pre-positioned, and the installation of the positioning component 2 can be guided to ensure that the positioning component 2 can be installed as quickly as possible, thereby reducing the installation time of the connecting plate 1 and improving the working efficiency of the tightening machine 5.

[0050] Illustratively, in this embodiment, the positioning sleeve 1101 is fixed to the connecting portion 102 by two connecting screws 1102. Illustratively, in this embodiment, the positioning rod 901 is a component provided on the cylinder head 9, and there are multiple of them. The number of pre-installed components 11 is two, and the inner diameter of the positioning sleeve 1101 needs to be larger than the diameter of the positioning rod 901.

[0051] It is worth noting that, in the present embodiment, the parts of the cylinder head 9 are used to realize the positioning of the connecting plate 1 , which makes full use of the performance of the cylinder head 9 and facilitates the installation of the positioning assembly 2 .

[0052] In an exemplary embodiment, the driving member is an adjusting cylinder 8 , the protruding end of the adjusting cylinder 8 is connected to the body of the tightening machine 5 , and the adjusting cylinder 8 drives the tightening machine 5 to move so as to drive the connecting plate 1 to move closer to or away from the cylinder cover 9 .

[0053] In this embodiment, an adjusting cylinder 8 is provided, and the protruding end of the adjusting cylinder 8 is connected to the tightening machine 5, so that the tightening machine 5 as a whole can move up and down under the drive of the adjusting cylinder 8, thereby driving the connecting plate 1 to move up and down, avoiding the movement of the engine, so that the engine can move to the bottom of the tightening machine 5, the connecting plate 1 moves down, and then the connecting plate 1 is fixed.

[0054] It is worth noting that, in this embodiment, a frame 12 is further provided, and the adjusting cylinder 8 is mounted on the frame 12 to facilitate driving the tightening machine 5 to move up and down as a whole.

[0055] It should also be noted that in this embodiment, the adjusting cylinder 8 provided can drive the connecting plate 1 to move up and down, and can be suitable for engines of different models. Since the sizes of engines of different models are different, the adjusting cylinder 8 provided can adjust the height of the connecting plate 1 to facilitate the connection between the connecting plate 1 and the cylinder head 9, thereby expanding the scope of application of the present utility model.

[0056] In an exemplary embodiment, the connecting plate 1 is a Z-shaped bent plate.

[0057] In this embodiment, the connecting plate 1 is bent twice to form a Z-shaped bent plate, so that one end is connected to the cylinder cover 9 and the other end is connected to the tightening machine 5.

[0058] For example, in this embodiment, the bottom surface of the positioning portion 101 is a plane, which facilitates the positioning portion 101 to fit with the cylinder head 9.

[0059] It is worth mentioning that the connecting plate 1 is provided with reinforcing ribs, which are respectively a first reinforcing rib arranged on the positioning portion 101 and a second reinforcing rib arranged on the connecting portion 102 . The first reinforcing rib and the second reinforcing rib can effectively increase the strength of the connecting plate 1 and enhance the service life of the connecting plate 1 .

[0060] In an exemplary embodiment, the free end of the tightening shaft 6 is detachably connected to a sleeve 7 , and an adapting hole matching with the connecting bolt 10 is opened at one end of the sleeve 7 close to the cylinder head 9 to drive the connecting bolt 10 to rotate.

[0061] In this embodiment, the sleeve 7 is mainly used to drive the connecting bolt 10 to rotate, thereby realizing the function of connecting the cylinder head 9 with the cylinder body, and the adapter hole is used to clamp the bolt head of the connecting bolt 10 to drive the connecting bolt 10 to rotate.

[0062] Illustratively, in this embodiment, the sleeve 7 is mounted on the tightening shaft 6 by means of screws, which facilitates maintenance and replacement.

[0063] In an exemplary embodiment, weight-reducing grooves 104 are symmetrically formed on the connecting plate 1 .

[0064] In this embodiment, six weight-reducing grooves 104 are formed on the connecting plate 1 to reduce the overall weight of the connecting plate 1 , so that the tightening machine 5 can quickly drive the connecting plate 1 to move, thereby improving processing efficiency.

[0065] Specific implementation steps: the first step is to install the connecting plate 1 on the engine body through the fixing component 4. The second step is to wait for the engine to enter under the tightening machine 5, and control the tightening machine 5 to move downward by adjusting the cylinder 8. The tightening machine 5 simultaneously drives the connecting plate 1 to move downward until the mounting hole of the positioning bolt 203 of the connecting plate 1 contacts the positioning hole on the cylinder head 9. The positioning bolt 203 is installed through the positioning component 2 and tightened to complete the fixation of the connecting plate 1 and the cylinder head 9. The third step is to run the tightening program of the tightening machine 5. After the tightening of the tightening machine 5 is completed, the positioning bolt 203 is taken out, and the tightening action is completed by lifting the tightening machine 5 by adjusting the cylinder 8, and the tightening quality of the connecting bolt 10 is checked.

[0066] In summary, the utility model forms an indirect fixation between the tightening machine 5 and the engine cylinder head 9 by setting the connecting plate 1, thereby reducing the impact of the engine vibration on the tightening shaft 6 of the tightening machine 5, ensuring the stability of the tightening machine 5 when executing the tightening procedure, thereby improving the tightening quality, greatly reducing the time required for manual remediation, and improving the production efficiency of engine manufacturing. At the same time, the service life of the sleeve 7 is guaranteed. In actual applications, the sleeve 7 is replaced once a year instead of five times a year, which effectively reduces the manufacturing cost of the engine and increases corporate benefits.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An engine cylinder head fixing device is used to connect the engine cylinder head and the cylinder body, wherein the cylinder head is provided with a positioning hole, wherein: The cylinder head and the cylinder body are connected by connecting bolts, and the cylinder head tightening device comprises: A connecting plate, the connecting plate having a positioning portion and a connecting portion, the connecting plate being detachably connected to the cylinder head via the connecting portion, and the positioning portion being provided with a positioning assembly connected to the cylinder head; A tightening machine, the tightening machine is connected to the connecting part, a driving member is provided on a side of the tightening machine away from the connecting plate, the connecting plate can be driven by the tightening machine to approach or move away from the cylinder head, and the tightening machine is provided with a plurality of tightening shafts for tightening the connecting bolts; Wherein, when the connecting plate is connected to the positioning hole, the tightening shaft and the corresponding connecting bolt are in a coaxial position.

2. The engine cylinder head fixing device according to claim 1, characterized in that: A connecting block is fixedly connected to the positioning portion, the number of the positioning components is at least two, the positioning component comprises a positioning block and a positioning bolt, the positioning block is detachably connected to the connecting block, and the positioning portion is connected to the cylinder head via the positioning bolt.

3. The engine cylinder head fixing device according to claim 2, characterized in that: The tightening machine is provided with a fixing rod, the connecting part is provided with a plurality of fixing components, and the fixing rod is connected with the fixing components.

4. The engine cylinder head fixing device according to claim 3, characterized in that: The fixing assembly comprises a fixing seat and a fixing bolt. The fixing seat is detachably connected to the connecting portion. A fixing sleeve is integrally formed on the fixing seat. The fixing rod passes through the fixing sleeve and is connected to the connecting portion via the fixing bolt.

5. The engine cylinder head fixing device according to claim 1, characterized in that: It also includes a pre-installation component, which includes a base detachably connected to the positioning part and a positioning sleeve integrally formed on the base. The cylinder head has a positioning rod, and the positioning rod is slidably connected to the positioning sleeve.

6. The engine cylinder head fixing device according to any one of claims 1 to 5, characterized in that: The driving member is an adjusting cylinder, the protruding end of the adjusting cylinder is connected to the tightening machine, and the adjusting cylinder can drive the tightening machine to move so as to drive the connecting plate to approach or move away from the cylinder cover.

7. The engine cylinder head fixing device according to claim 1, characterized in that: The positioning portion and the connecting portion are respectively provided with a first reinforcing rib and a second reinforcing rib.

8. The engine cylinder head fixing device according to claim 7, characterized in that: The free end of the tightening shaft is detachably connected with a sleeve, and an end of the sleeve close to the cylinder cover is provided with an adapting hole matched with the connecting bolt to drive the connecting bolt to rotate.

9. The engine cylinder head fixing device according to claim 8, characterized in that: The number of the tightening shafts is eighteen, and the positions of the tightening shafts correspond one-to-one to the positions of the connecting bolts.

10. The engine cylinder head fixing device according to claim 1, characterized in that: The connecting plate is symmetrically provided with weight-reducing grooves.

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