CN116551621B - Valve positioning piece, positioning mechanism, press-fitting device and press-fitting method - Google Patents
Valve positioning piece, positioning mechanism, press-fitting device and press-fitting method Download PDFInfo
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- CN116551621B CN116551621B CN202310852184.3A CN202310852184A CN116551621B CN 116551621 B CN116551621 B CN 116551621B CN 202310852184 A CN202310852184 A CN 202310852184A CN 116551621 B CN116551621 B CN 116551621B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000003825 pressing Methods 0.000 description 11
- 238000009434 installation Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The application discloses a valve positioning piece, a positioning mechanism, a press mounting device and a press mounting method, wherein the valve positioning piece comprises at least two positioning blocks, the positioning blocks can move relatively along the horizontal direction so as to be converted between a combining state and an opening state, the side walls of the positioning blocks are provided with positioning grooves penetrating through the positioning blocks along the vertical direction, the positioning grooves comprise a first section which is positioned at the top of the positioning grooves and gradually tapers from top to bottom, and a second section which vertically extends downwards along the bottom of the first section, when the valve positioning piece is in the combining state, the at least two positioning grooves can be combined to form a positioning cavity, the first section is combined to form an inlet part with the inner diameter larger than that of a valve mounting hole, and the second section is combined to form a guide part with the same inner diameter as that of the valve mounting hole; when in an open state, a gap formed between the at least two positioning blocks is larger than the cross-sectional area of the valve head. According to the technical scheme of the application, the valve can be aligned with the valve mounting hole through the positioning cavity, so that the fault tolerance rate of the valve during mounting is improved.
Description
Technical Field
The present application relates to the field of automobile manufacturing, and more particularly, to a valve positioning member, a positioning mechanism, a press-fitting device, and a press-fitting method.
Background
With the rapid development of the automobile industry and the increasing demands of people on automobiles, automobile manufacturers need to continuously improve the production efficiency to ensure the market demands. Because the production of current car is through different production workshops to the production of different spare parts, then has the kludge to assemble the spare part of production together, has formed complete car production line like this, consequently, the production efficiency of every spare part must be guaranteed to the production efficiency of guaranteeing the car.
In the engine assembly process, the valve is required to be pressed and assembled to the cylinder cover, and because the gap between the valve and the cylinder cover is smaller, the automatic assembly requires high equipment precision, and the valve installation is usually manually installed at present, so that the production efficiency of a production line is affected. And the common manipulator is used for mounting and easy to deviate, if the valve and the cylinder cover are not aligned, the valve or the cylinder cover can be damaged by press mounting, and high-precision equipment is needed to be purchased for realizing automatic assembly of the valve, so that the cost is greatly increased.
Therefore, how to improve the accuracy of the device when installing the valve or improve the fault tolerance of the device when installing the valve is a technical problem to be solved by the present application.
Disclosure of Invention
In view of the foregoing, the present application proposes a valve positioning member to overcome the above technical problems.
According to the application, the valve positioning piece comprises at least two positioning blocks, wherein the positioning blocks can move relatively along the horizontal direction so as to be converted between a merging state and an opening state, the side walls of the positioning blocks are provided with positioning grooves penetrating through the positioning blocks along the vertical direction, the positioning grooves comprise first sections which are positioned at the tops of the positioning blocks and taper from top to bottom, and second sections which extend downwards vertically along the bottoms of the first sections, when the valve positioning piece is in the merging state, the at least two positioning grooves can be spliced to form a positioning cavity, the first sections are spliced to form an inlet part with the inner diameter larger than that of a valve mounting hole, and the second sections are spliced to form a guide part with the same inner diameter as that of the valve mounting hole; when in the open state, a gap formed between at least two positioning blocks is larger than the cross-sectional area of the valve head.
Preferably, the valve positioning member includes two positioning blocks that can be moved toward and away from each other in a horizontal direction to switch between the merging state and the opening state.
Preferably, the valve positioning piece comprises a positioning plate, two positioning blocks are movably arranged on the upper surface of the positioning plate along the horizontal direction, and the positioning plate is provided with an opening which is not smaller than the gap.
Preferably, the positioning block is movably mounted on the positioning plate along the horizontal direction through a horizontal sliding table.
According to the application, a positioning mechanism is also provided, which comprises a bracket, a positioning frame movably mounted on the bracket and the valve positioning piece mounted on the positioning frame.
Preferably, the positioning frame is movably mounted on the bracket along the vertical direction through a vertical sliding table.
Preferably, the positioning frame is provided with a pushing part capable of moving relative to the valve positioning piece in the vertical direction, the pushing part comprises a pushing head protruding vertically downwards, and the pushing head can be located right above the positioning cavity.
Preferably, the valve positioning member is floatably mounted to the positioning frame in the vertical direction by a floating portion.
According to this application, still propose a valve pressure equipment device, include: the valve positioning device comprises a valve picking mechanism, a valve pressing mechanism and a positioning mechanism, wherein the positioning mechanism is arranged above a cylinder cover, the positioning cavity is aligned with a valve mounting hole and used for receiving a valve picked up by the valve picking mechanism when the valve positioning piece is in a combined state, and the valve pressing mechanism is used for pressing the valve to the cylinder cover when the valve positioning piece is in the open state.
According to the present application, there is also provided a valve press-fitting method using the press-fitting device as described above, comprising:
s1, setting a cylinder cover to be pressed;
s2, moving the valve positioning piece to the position above the cylinder cover, and enabling the valve positioning piece to be in a combined state so as to align the positioning cavity with the valve mounting hole;
s3, picking up the valve through the valve picking mechanism, moving the valve to the position above the positioning cavity, loosening the valve, enabling the valve rod to fall into the inlet part, and enabling the valve rod to fall into the valve mounting hole through the guide part;
s4, converting the positioning mechanism into the opening state, and pushing the valve head vertically downwards through the press-fitting mechanism so as to press-fit the valve to the cylinder cover.
According to the technical scheme of this application, the location chamber of valve setting element can be aligned with the valve mounting hole, and the entrance of location chamber has great opening, even if there is the deviation in valve position also can get into the location chamber through entrance to make the valve stem get into the valve mounting hole through guiding part, improved the fault tolerance when the valve is installed.
Additional features and advantages of the present application will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic view of a locating block according to one embodiment of the present application;
FIG. 2 is a top view of the positioning block shown in FIG. 1 in a combined state;
FIG. 3 is a partial cross-sectional view of the locating block of FIG. 2;
FIG. 4 is a schematic illustration of a valve positioning member according to an embodiment of the present application;
fig. 5 is a schematic view of a positioning mechanism according to one embodiment of the present application.
Detailed Description
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in combination with embodiments.
According to one aspect of the present application, there is provided a valve positioning member, including at least two positioning blocks 100, the positioning blocks 100 being capable of relatively moving along a horizontal direction to switch between a combined state and an open state, a sidewall of the positioning block 100 being provided with a positioning groove 101 penetrating the positioning block 100 along a vertical direction, wherein the positioning groove 101 includes a first section 1011 tapered from top to bottom and a second section 1012 extending vertically downward along a bottom of the first section 1011, wherein when the valve positioning member is in the combined state, at least two positioning grooves 101 are capable of being spliced to form a positioning cavity, the first section 1011 is spliced to form an inlet portion 110 having an inner diameter larger than an inner diameter of a valve mounting hole, and the second section 1012 is spliced to form a guide portion 120 having the same inner diameter as the valve mounting hole; when in the open state, a gap formed between at least two of the positioning blocks 100 is larger than a cross-sectional area of the valve head.
According to the technical scheme of this application, the location chamber of valve setting element can be aligned with the valve mounting hole, and the entrance 110 of location chamber has great opening, even if there is a little deviation in valve position also can get into the location chamber through entrance 110 to make the valve stem get into the valve mounting hole through guiding part 120, improved the fault tolerance when the valve is installed.
In the technical solution of the present application, the positioning blocks 100 may take various suitable forms to be able to switch between a combination state forming a positioning cavity and an open state forming a gap, for example, the positioning blocks 100 may include three positioning blocks 100, where each positioning block 100 may have two sidewalls with an included angle of 120 °, and the positioning slots 101 are formed at intersections of the two sidewalls, where an arc surface of a cross section of each positioning slot 101 has a central angle of 120 °, and the positioning blocks 100 are driven by a driving mechanism connected to each positioning block 100, such as an air cylinder, a hydraulic cylinder, or the like, so that the three positioning blocks 100 can move in a direction with an included angle of 120 ° along a moving direction in a horizontal direction, so that the three positioning blocks 100 enter the combination state when the sidewalls contact each other, and at this time, the three positioning slots 101 form a complete positioning cavity; when the three positioning blocks 100 are driven to move in a direction away from each other, the positioning cavity is decomposed, and when the positioning blocks 100 move to a state that the gap between them is larger than the cross-sectional area of the valve head, and the like, it is understood that the positioning blocks may also include two, four or more, only the shape of the positioning blocks 100 needs to be adjusted, and in addition, the included angles of the moving directions of the plurality of positioning blocks 100 are not necessarily the same, as long as the positioning cavity can be formed in the combined state, and the gap larger than the cross-sectional area of the valve head can be formed in the opened state, which is not limited.
When the valve positioning piece is in a combined state, the positioning cavity formed by the positioning grooves 101 is provided with a plurality of parts, the top of the positioning cavity comprises an inlet part 110 with the inner diameter gradually reduced from top to bottom, and a guide part 120 with the same inner diameter as the valve mounting hole of the cylinder cover is arranged below the positioning cavity. Wherein the inlet portion 110 is for receiving a valve stem, and the guide portion 120 is for aligning the valve stem, which is entered therein through the inlet portion 110, with the valve mounting hole. The cross section of the inlet 110 may be an inverted trapezoid or a horn-like shape having a curvature, and is not limited thereto, as long as the valve stem can smoothly enter the guide 120.
When in actual use, the valve positioning piece is arranged above the cylinder cover, the positioning cavity is aligned with the valve mounting hole of the cylinder cover, the valve rod with a larger range can be received through the inlet part 110 with a larger opening, even if the valve is positioned inaccurately, the valve rod can fall into the inlet part 110, the valve rod gradually falls into the guide part 120 in the falling process through the structure from top to bottom, so that the position error of the valve is corrected, and the corrected valve rod penetrates out from the bottom of the guide part 120 and enters the valve mounting hole aligned with the positioning cavity, so that the positioning of the valve is realized.
When the valve is positioned well and a part of the valve enters the valve mounting hole, the cross section area of the valve head is larger than that of the positioning cavity and can be stopped by the positioning block 100, at the moment, the positioning blocks 100 are driven to be away from each other, so that the valve positioning piece enters an open state, at the moment, the gap between the positioning blocks 100 is larger than that of the valve head, the valve head can not be stopped by the positioning blocks 100, and the valve rod can continuously enter the valve mounting hole, so that preparation is made for a subsequent valve press-mounting process.
Through this application, the valve moves to the present valve setting element top that is in the merge state through picking up equipment, even if there is the position deviation of valve, can also make the valve get into wherein through great open-ended entrance 110 to finally correct the position of valve through guide 120, make valve and valve mounting hole alignment. And then the valve positioning piece is converted into an opening state so as to facilitate the press fitting of the subsequent valve. The problem that the valve cannot be pressed due to deviation between the valve position and the valve mounting hole is solved, and the fault tolerance of the valve position during the valve pressing is improved.
The positioning block 100 may take a suitable form to effect the transition of the valve positioning member between the combined state and the open state, and according to one preferred embodiment, as shown in fig. 1-4, the valve positioning member includes two positioning blocks 100, the two positioning blocks 100 being horizontally movable toward and away from each other to transition between the combined state and the open state.
In the technical scheme of the application, two positioning blocks 100 can be two halves respectively, the shapes of the two positioning blocks 100 are mutually symmetrical, the two positioning blocks are provided with side walls facing horizontally and perpendicular to each other, and the side walls are provided with positioning grooves 101, namely, the positioning grooves 101 are half grooves with semicircular cross sections. The two positioning blocks 100 are disposed such that the side walls having the positioning grooves 101 are disposed opposite to each other, and the two side walls having the positioning grooves 101 are in contact with each other when in the combined state, thereby forming the two positioning grooves 101 into a complete positioning chamber. Also, as shown in fig. 1 and 2, the positioning block 100 may be provided with a plurality of positioning grooves 101 on the side wall of the same side, so as to position a plurality of valves at the same time. The two positioning blocks 100 may be driven by a horizontal driving device 220 such as an air cylinder, a hydraulic cylinder, etc., so that the positioning blocks 100 are moved toward or away from each other in a horizontal direction, thereby switching between the combined state and the opened state.
Alternatively, each positioning block 100 may be connected with a rotation driving device having a vertical rotation axis at the end on the same side, so that the two positioning blocks 100 are driven by the rotation driving device to rotate around the axis of the respective end, so that the two positioning blocks 100 are switched between a merging state where the side walls are in contact and an open state where the extending direction of the side walls is angled.
Alternatively, the positioning blocks 100 may be connected to a rotation driving device having a vertical rotation axis at both end portions, respectively, so that the two positioning blocks 100 are driven to rotate about the axes of the respective end portions by the rotation driving device, and the two positioning blocks 100 are switched between a combined state in which the side walls are in contact and an open state in which the extending directions of the side walls are parallel and distant from each other.
In order to facilitate the installation of the positioning block 100, according to a preferred embodiment, as shown in fig. 4, the valve positioning member includes a positioning plate 200, two positioning blocks 100 are movably installed on the upper surface of the positioning plate 200 in the horizontal direction, and the positioning plate 200 is provided with an opening 201 not smaller than the gap.
In the technical solution of the present application, the positioning plate 200 may have a horizontal surface, two positioning blocks 100 are disposed on the upper surface of the positioning plate 200, so that the positioning blocks 100 can move on a horizontal plane defined by the upper surface of the positioning plate 200, in order not to affect positioning of the valve and subsequent valve press-fitting procedures, the positioning plate 200 is provided with an opening 201, and the area of the opening 201 is not smaller than that of a gap formed between the positioning blocks 100 when the valve positioning member is in an open state, so that the valve head is convenient to pass through the positioning plate 200, where the opening 201 may be formed in a suitable form, for example, a larger opening may be formed, for example, as shown in fig. 4; the positioning cavity may be provided with a plurality of openings larger than the valve head, and the like, so long as the valve head is not affected by the positioning plate 200.
In order to limit the movement of the positioning block 100 and make the movement of the positioning block 100 more stable, according to a preferred embodiment, as shown in fig. 4, the positioning block 100 is movably mounted on the positioning plate 200 along the horizontal direction by a horizontal sliding table.
In the technical solution of the present application, the horizontal sliding table may include a horizontal sliding portion 210 connected with the positioning block 100, and a horizontal sliding rail 230 installed on the positioning plate 200 and extending along a horizontal direction, where the horizontal sliding portion 210 is slidably installed on the horizontal sliding rail 230, so as to limit the horizontal sliding portion 210, so that the horizontal sliding portion can only slide along the extending direction of the horizontal sliding rail 230, thereby limiting the positioning block 100 connected with the horizontal sliding portion 210. To improve stability, the horizontal rail 230 may be provided in parallel in plurality to guide the sliding of the horizontal sliding portion 210 together.
Through the application, the positioning block 100 can slide along the horizontal direction in a limited manner through the horizontal sliding rail 230 and the horizontal sliding part 210, so that the stability of the positioning block 100 in the moving process is improved.
According to another aspect of the present application, there is also provided a positioning mechanism including a bracket 500, a positioning frame 400 movably mounted to the bracket 500, and the valve positioning member as described above mounted to the positioning frame 400.
In the technical solution of the present application, the positioning mechanism may be disposed in an apparatus for press-fitting a valve to a cylinder head, and fixed between the cylinder head to be fitted with the valve and the mechanism for press-fitting the valve through a bracket 500, wherein the positioning frame 400 may be disposed on the bracket 500 in a suitable form so as to be movable with respect to the bracket 500, for example, the positioning frame 400 may be connected to the bracket 500 through a vertical driving device 420 such as a hydraulic cylinder or an air cylinder so that the valve positioning member may be movable at least in a vertical direction with respect to the bracket 500 so that the valve positioning member may be moved to a position close to or in contact with the cylinder head, so that when the valve positioning member is in a combined state, the positioning chamber may be aligned with the valve mounting hole in a vertical direction and the bottom of the valve positioning member may be close to or in contact with the top surface of the cylinder head, so that after the valve is moved to the mounting position by a pickup device such as a robot, the valve rod may be able to enter the positioning chamber through the inlet 110 and the valve mounting hole may be accurately inserted into the valve mounting hole by the guide 120.
Through the application, in the actual operation process, because the positioning cavity of the positioning mechanism is aligned with the valve mounting hole, the valve with deviation in position can be aligned with the valve mounting hole through the positioning cavity by the positioning mechanism, the problem that the valve position and the valve mounting hole have deviation and cannot be pressed is solved, and the fault tolerance of the valve position during the valve pressing is improved.
In order to limit the movement of the valve positioning member so that the valve positioning member can move more stably, the positioning frame 400 is movably mounted to the bracket 500 in the vertical direction through a vertical sliding table.
In the technical scheme of the application, the vertical sliding table can include the vertical sliding part 440 that is connected with the locating rack 400, and install in the vertical slide rail 430 that extends along the vertical direction of support 500, the vertical sliding part 440 slidable installs on vertical slide rail 430 to it is spacing to vertical sliding part 440, makes it can only slide along the extending direction of vertical slide rail 430, thereby makes the locating rack 400 that is connected with vertical sliding part 440 slide at the spacing ground of vertical direction. To improve stability, the vertical sliding rail 430 may be provided in plurality in parallel to guide the sliding of the vertical sliding portion 440 together.
Through this application, locating rack 400 can follow the spacing slip of vertical direction through vertical slide rail 430 and vertical slider 440, has improved the stability of valve setting element removal in-process.
In order to ensure that the valve passing through the positioning cavity enters the valve mounting hole, and prevent the valve rod from falling off due to the fact that the valve rod does not enter the valve mounting hole or the entering amount is too small after the valve positioning piece is converted into the open state, according to a preferred embodiment, as shown in fig. 5, the positioning frame 400 is provided with a pushing part 300 capable of moving relative to the valve positioning piece along the vertical direction, the pushing part 300 comprises a pushing head 301 protruding vertically downwards, and the pushing head 301 can be located right above the positioning cavity.
In the technical scheme of the application, the same number of pushing heads 301 can be correspondingly arranged according to the number of the positioning cavities in the valve positioning piece, so that each pushing head 301 can be positioned right above the corresponding positioning cavity. The pushing part 300 may be connected to the positioning frame 400 by a driving mechanism 310 such as a hydraulic cylinder or an air cylinder so that the pushing part 300 can move in a vertical direction with respect to the valve positioning member. Preferably, the pushing part 300 may include a horizontal moving mechanism to enable the pushing part 300 to move in a horizontal direction so as to avoid an upper position of a gap between the positioning blocks in an opened state, so that the valve head can be exposed without being blocked by the pushing part 300, facilitating press-fitting, for example, from directly above the valve by a press-fitting mechanism or the like.
Through this application, the valve passes through the valve setting element location earlier, and the vertical downwardly moving of drive pushing part 300 again makes the top surface that promotes the head 301 contact valve head to push down the valve stem, thereby makes the valve stem insert the suitable position in the valve mounting hole, makes the valve setting element change back into the open state, and the valve can keep in current position, has avoided because the valve stem does not insert the valve mounting hole or inserts the volume and is too little, the risk that drops from the valve mounting hole.
In order to avoid that the valve retainer presses the cylinder head during the descent, and damages the cylinder head or the retainer, according to a preferred embodiment, the valve retainer is floatably mounted to the retainer 400 in the vertical direction by a floating portion 410, as shown in fig. 5.
In the technical scheme of this application, the floating part 410 can be including being fixed in the installation department of locating rack 400 and wearing to locate the installation department and be connected with the valve setting element's pole portion, and pole portion can float and receive the spacing of installation department for the installation department along vertical direction makes pole portion only can float in a certain extent along vertical direction, and wherein, pole portion can include the top of the cross-sectional area that is greater than other parts to stop in the installation department through the top to can connect through the elastomer between pole portion and the installation department. Preferably, the floating part 410 may include a plurality of floating parts to be disposed around the valve positioning member, respectively, thereby improving stability during floating.
Through this application, after the valve setting element moves down and contacts the cylinder cap, even if actuating mechanism continues to drive the valve setting element downwards, can offset unnecessary moving amount through floating part 410, avoid valve setting element and cylinder cap to take place the extrusion.
According to another aspect of the present application, there is also provided a press-fitting device for press-fitting a valve to a cylinder head, including: the valve positioning device comprises a valve picking mechanism, a valve pressing mechanism and a positioning mechanism, wherein the positioning mechanism is arranged above a cylinder cover, the positioning cavity is aligned with a valve mounting hole and used for receiving a valve picked up by the valve picking mechanism when the valve positioning piece is in a combined state, and the valve pressing mechanism is used for pressing the valve to the cylinder cover when the valve positioning piece is in the open state.
In the solution of the present application, the valve picking mechanism may take a suitable form, such as a manipulator, for picking up the valve from the standby area and moving the valve over the positioning mechanism, and substantially aligning the valve with the positioning cavity. The valve stem is received through the inlet portion 110 and the valve is aligned with the valve mounting hole through the guide portion 120. The valve press-mounting mechanism is arranged above the positioning mechanism and can comprise a press-mounting head capable of moving along the vertical direction, and the press-mounting head can be driven by a driving mechanism such as an air cylinder or a hydraulic cylinder so as to push the valve head downwards from the upper direction of the valve, so that the valve is press-mounted in the cylinder cover.
Through the application, the valve picking mechanism can be used without high precision, and the position of the valve with deviation from the valve mounting hole can be corrected through the positioning mechanism, so that the valve can be smoothly pressed, the problem that the valve cannot be pressed due to deviation from the valve mounting hole is solved, and the fault tolerance of the valve position during valve pressing is improved.
According to another aspect of the present application, there is also provided a press-fitting method for press-fitting a valve to a cylinder head, the press-fitting method using the press-fitting apparatus as described above, including: s1, setting a cylinder cover to be pressed; s2, moving the valve positioning piece to the position above the cylinder cover, and enabling the valve positioning piece to be in a combined state so as to align the positioning cavity with the valve mounting hole; s3, picking up the valve through the valve picking mechanism, moving the valve to the position above the positioning cavity, loosening the valve, enabling the valve rod to fall into the inlet part 110, and enabling the valve rod to fall into the valve mounting hole through the guide part 120; s4, converting the positioning mechanism into the opening state, and pushing the valve head vertically downwards through the press-fitting mechanism so as to press-fit the valve to the cylinder cover.
In the technical scheme of the application, in S1, the press-fitting device can pick up a cylinder cover to be assembled on a production line through a mechanism such as a holding sliding table, and after the cylinder cover is picked up, the cylinder cover is adjusted to a state to be press-fitted to prepare for press-fitting, and normally, the cylinder cover needs to be overturned, so that the part of a valve mounting hole for stopping a valve head is exposed, and the valve mounting hole extends vertically; then S2, the valve positioning piece is operated to vertically move downwards until approaching or contacting the cylinder cover, and the positioning block 100 is driven to move, so that the valve positioning piece is converted into a combined state to form a positioning cavity, and the positioning cavity is aligned with the valve mounting hole; then entering S3, picking up and moving the valve from the area to be picked up to the upper side of the positioning mechanism by the valve picking mechanism, so that the valve is approximately aligned with the positioning cavity (as long as the current position can enable the end of the valve rod to fall into the inlet part 110), then releasing the valve picking mechanism to enable the valve rod to fall into the inlet part 110, enabling the valve rod to enter the guide part 120 through the inlet part 110, enabling the valve to be positioned to align with the valve mounting hole due to the fact that the guide part 120 is aligned with the valve mounting hole, and enabling the valve rod to fall into the valve mounting hole under the gravity, preferably, in order to ensure that the valve rod falls into the proper position of the mounting hole, moving the pushing part 300 to the right upper side of the positioned valve by the horizontal moving mechanism, and driving the pushing head 301 to move downwards so as to push the valve rod to further enter the valve mounting hole, and then resetting the pushing part 300; and then S4, driving the positioning block 100 to reversely move to enable the valve positioning piece to be switched to an open state, and driving the press-fitting mechanism to enable the press-fitting mechanism to vertically push the valve head downwards, so that the valve is completely press-fitted into the cylinder cover, and the press-fitting process of the valve is completed once. The press-fitted cylinder head can move the cylinder, which has been completed by the pile pressing, to other stations of the production line by a conveying device and is ready to receive the cylinder head to be press-fitted.
Through the application, the valve picking mechanism can be used without high precision, and the position of the valve with deviation from the valve mounting hole can be corrected through the positioning mechanism, so that the valve can be smoothly pressed, the problem that the valve cannot be pressed due to deviation from the valve mounting hole is solved, and the fault tolerance of the valve position during valve pressing is improved.
The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail.
Moreover, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein.
Claims (10)
1. The valve positioning piece is characterized by comprising at least two positioning blocks (100), wherein the positioning blocks (100) can relatively move along the horizontal direction so as to switch between a combining state and an opening state, a positioning groove (101) penetrating through the positioning blocks (100) is formed in the side wall of each positioning block (100) along the vertical direction, the positioning groove (101) comprises a first section (1011) which is positioned at the top of each positioning groove and gradually tapers from top to bottom, and a second section (1012) which vertically extends downwards along the bottom of each first section (1011), when the valve positioning piece is in the combining state, the at least two positioning grooves (101) can be spliced to form a positioning cavity, the first section (1011) is spliced to form an inlet part (110) with the inner diameter larger than that of a valve mounting hole so as to receive a valve stem, and the second section (1012) is spliced to form a guide part (120) which is identical to the inner diameter of the valve mounting hole and can be aligned with the valve mounting hole so as to guide the valve stem to be inserted into the mounting hole; when in the open state, a gap formed between at least two positioning blocks (100) is larger than the cross-sectional area of the valve head.
2. A valve positioning member according to claim 1, characterized in that it comprises two positioning blocks (100), the two positioning blocks (100) being horizontally movable towards and away from each other for switching between said merging and opening states.
3. A valve positioning member according to claim 2, characterized in that the valve positioning member comprises a positioning plate (200), two positioning blocks (100) are movably mounted on the upper surface of the positioning plate (200) in the horizontal direction, and the positioning plate (200) is provided with an opening (201) not smaller than the gap.
4. A valve positioning member according to claim 3, wherein the positioning block (100) is mounted to the positioning plate (200) movably in a horizontal direction by a horizontal slide table.
5. A positioning mechanism comprising a bracket (500), a positioning frame (400) movably mounted to the bracket (500), and a valve positioning member according to any one of claims 1 to 4 mounted to the positioning frame (400).
6. The positioning mechanism according to claim 5, wherein the positioning frame (400) is mounted to the bracket (500) by a vertical slide table movably in a vertical direction.
7. The positioning mechanism according to claim 5, characterized in that the positioning frame (400) is mounted with a pushing part (300) movable in a vertical direction with respect to the valve positioning member, the pushing part (300) comprising a pushing head (301) protruding vertically downwards, the pushing head (301) being positionable directly above the positioning cavity.
8. The positioning mechanism according to any one of claims 5 to 7, wherein the valve positioning member is floatably mounted to the positioning frame (400) in a vertical direction by a floating portion (410).
9. A valve press-fitting device, characterized by comprising: a valve pick-up mechanism, a valve press-fitting mechanism and a positioning mechanism as claimed in any one of claims 5 to 8, wherein the positioning mechanism is provided above a cylinder head and the positioning cavity is aligned with a valve mounting hole for receiving a valve picked up by the valve pick-up mechanism when the valve positioning member is in a combined state, the valve press-fitting mechanism being for press-fitting the valve to the cylinder head when the valve positioning member is in the open state.
10. A valve press-fitting method, characterized in that the press-fitting method uses the press-fitting device according to claim 9, comprising:
s1, setting a cylinder cover to be pressed;
s2, moving the valve positioning piece to the position above the cylinder cover, and enabling the valve positioning piece to be in a combined state so as to align the positioning cavity with the valve mounting hole;
s3, picking up the valve through the valve picking mechanism, moving the valve to the position above the positioning cavity, loosening the valve, enabling the valve rod to fall into the inlet part (110), and enabling the valve rod to fall into the valve mounting hole through the guide part (120);
s4, converting the positioning mechanism into the opening state, and pushing the valve head vertically downwards through the press-fitting mechanism so as to press-fit the valve to the cylinder cover.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852184.3A CN116551621B (en) | 2023-07-12 | 2023-07-12 | Valve positioning piece, positioning mechanism, press-fitting device and press-fitting method |
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| CN202310852184.3A CN116551621B (en) | 2023-07-12 | 2023-07-12 | Valve positioning piece, positioning mechanism, press-fitting device and press-fitting method |
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| CN116551621A (en) | 2023-08-08 |
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