Valve seat ring press-fitting device for engine cylinder cover

Abstract

The utility model discloses a valve seat ring press-fitting device for an engine cylinder cover, which comprises a feeding mechanism, a material receiving mechanism, a press-fitting mechanism and a material receiving seat, the material receiving mechanism is arranged on the material receiving seat, the material receiving mechanism is communicated with a discharge port of the feeding mechanism, the material receiving mechanism comprises a left material clamping block and a right material clamping block, and the left material clamping block and the right material clamping block are arranged on the material receiving seat. The left material clamping block and the right material clamping block are both rotationally connected with the material receiving base, a left limiting groove and a right limiting groove are formed in one sides of the opposite ends of the left material clamping block and the right material clamping block correspondingly, the press fitting mechanism comprises a servo press and a pressing rod connected with the servo press, and a control assembly is arranged on the material receiving mechanism. The control assembly and the pressing rod are matched with the corresponding left material clamping block and the corresponding right material clamping block so as to control the left material clamping block and the right material clamping block to be opened and closed on the material receiving base. By means of the mode, the seat ring and the engine cylinder cover can be stably and automatically pressed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine cylinder cover processing, in particular to a valve seat ring press fitting device for engine cylinder cover. BACKGROUND

[0002] On the automobile cylinder cover assembly line, a large number of assemblies need to be press fitted to be completed, such as the valve seat ring on the cylinder cover of the engine, which needs to be press fitted on the valve step hole on the cylinder cover, and the press fitting quality of the seat ring is crucial, if the press fitting is inclined or not in place, it will lead to single deviation of the seat ring hole machining or unqualified position of the sealing surface, the sealing performance of the seat ring is reduced, gas leakage occurs, oil consumption increases, and abnormal wear of the seat ring hole is accelerated, which affects the performance parameters of the engine.

[0003] The conventional press fitting seat ring mode adopts manual knocking press fitting, and a non-standard seat ring press fitting auxiliary tool is made, the seat ring is first assembled on the press fitting auxiliary tool by manual work, and then the press fitting is carried out one by one, this mode is convenient to operate, low in cost, but low in efficiency. Moreover, the control performance of the press fitting process is poor, the press fitting force is unbalanced, the seat ring is pressed into the seat ring bottom hole after being impacted instantaneously, and the press fitting depth consistency is poor. UTILITY MODEL CONTENTS

[0004] The utility model mainly solves the technical problem that a seat ring and an engine cylinder cover can be press fitted stably and automatically.

[0005] In order to solve the above technical problems, one technical scheme of the utility model is provided: a valve seat ring press fitting device for engine cylinder cover, comprising: a feeding mechanism, a receiving mechanism, a press fitting mechanism and a receiving seat, the receiving mechanism is arranged on the receiving seat, the receiving mechanism is communicated with the discharge port of the feeding mechanism, and is used for bearing the seat ring from the feeding mechanism, the receiving mechanism comprises left and right clamping blocks, the left and right clamping blocks are rotationally connected with the receiving seat, and the opposite side of the left and right clamping blocks is respectively provided with a left limiting groove and a right limiting groove, the left limiting groove and the right limiting groove are oppositely arranged and matched with the seat ring, the press fitting mechanism comprises a servo press and a press rod connected with the servo press, when the seat ring is press fitted on the cylinder cover, the servo press drives the press rod to pass between the left limiting groove and the right limiting groove and press the seat ring into the cylinder cover;

[0006] A control assembly is arranged on the receiving mechanism, the control assembly and the press rod are matched with the corresponding left and right clamping blocks to control the opening and closing of the left and right clamping blocks on the receiving seat;

[0007] When the press rod is not extended and the left and right clamping blocks are in the closed state under the cooperation of the control assembly, the distance between the left limiting groove and the right limiting groove in the closed state is matched with the outer diameter of the seat ring;

[0008] When the pressing rod is extended and under the cooperation of the control assembly, the left clamping block and the right clamping block are in the open state, and the distance between the left limiting slot and the right limiting slot in the open state is greater than the diameter of the seat ring.

[0009] Preferably, the left clamping block and the right clamping block are rotatably connected with the material receiving seat through a rotating shaft arranged on the material receiving seat, and the control assembly comprises a spring and a limiting pin, one end of the spring abuts against the material receiving seat, and the other end abuts against the end of the corresponding left clamping block or right clamping block away from the material outlet, so as to force the left clamping block and the right clamping block to be in the closed state at the end close to the material outlet, and the limiting pin is arranged on the corresponding left clamping block or right clamping block and abuts against the material receiving seat at one end when the left clamping block and the right clamping block are in the closed state, so as to ensure the minimum distance between the left limiting slot and the right limiting slot in the closed state.

[0010] Preferably, the pressing rod comprises a rod part and a head part, the diameter of the rod part is greater than the diameter of the head part, and the head part cooperates with the seat ring, and when the head part of the pressing rod is inserted into the seat ring, the seat ring is arranged on the head part of the pressing rod.

[0011] Preferably, the left clamping block and the right clamping block are respectively provided with a left roller and a right roller, the minimum distance between the left roller and the right roller is greater than the outer diameter of the head part of the pressing rod and less than the outer diameter of the rod part of the pressing rod, and when the head part is inserted into the seat ring, the rod part is in contact with the left roller and the right roller, so as to force the left roller and the right roller to move away from each other with the left clamping block and the right clamping block, thereby avoiding hindering the movement of the pressing rod.

[0012] Preferably, a transition part is arranged between the head part and the rod part, the outer diameter of the transition part is greater than the outer diameter of the head part and less than the outer diameter of the rod part.

[0013] Preferably, an avoiding gap is arranged on the head part, the avoiding gap is arranged on the side of the head part close to the left roller and the right roller, and a transition surface for the left roller and the right roller is arranged on the side of the transition part close to the left roller and the right roller.

[0014] Preferably, a magnet is embedded in the head part of the pressing rod, and the magnet is used to attract the seat ring to the head part of the pressing rod.

[0015] Preferably, a material removing assembly is further arranged in the moving direction of the pressing rod, the material removing assembly comprises a material removing cylinder and a material removing claw arranged on the material removing cylinder, the material removing cylinder is arranged on one side of the material receiving seat, and the material removing claw is used to clamp and remove the seat ring which fails to be pressed on the pressing rod.

[0016] Preferably, a bushing is arranged in the material receiving seat, and the pressing rod is in sliding cooperation with the bushing.

[0017] The utility model discloses a beneficial effect is: through left clamping material block, right clamping material block, the cooperation of control component, thereby stably receive the seat ring of incoming material, and can guarantee the stability of seat ring posture, and with the cooperation of pressure rod under, in the cooperation of control component under the change of pressure rod head, transition part, the outer diameter of stem portion and control left clamping material block and right clamping material block between opening or closing, make pressure rod take seat ring and pass or accept the seat ring of next incoming material, through servo press control pressure rod's position, thereby guarantee the consistency of seat ring pressure -mounting depth. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the position relation schematic drawing of the utility model and the equipment of being in;

[0019] Figure 2 It is the structure schematic drawing of the whole of the utility model;

[0020] Figure 3 It is the three -dimensional structure schematic drawing of the utility model material receiving mechanism, material removing subassembly, material receiving seat;

[0021] Figure 4 It is the sectional view of material receiving mechanism when the utility model is in closed state;

[0022] Figure 5 It is the sectional view of material receiving mechanism when the utility model is in open state;

[0023] Figure 6 It is Figure 2 A part enlarged schematic drawing in.

[0024] The marking of each component in the drawing is as follows:

[0025] 1, feeding mechanism;11, discharge port;

[0026] 2, material receiving mechanism;21, left clamping material block;211, left limit slot;212, left roller;22, right clamping material block;221, right limit slot;222, right roller;23, rotating shaft;

[0027] 3, pressure mounting mechanism;31, servo press;32, pressure rod;321, stem portion;322, head;3221, avoiding notch;323, transition part;3231, transition surface;

[0028] 4, material receiving seat;

[0029] 5, control component; 51, spring; 52, limit pin;

[0030] 6, material removing subassembly; 61, material removing cylinder; 62, material removing claw;

[0031] 7, bushing;

[0032] 8, seat ring. DETAILED DESCRIPTION

[0033] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific details set forth herein without departing from the scope of the present application, and it is understood that variations can be made in the steps and components described herein by workers skilled in the art. Accordingly, the present application is not limited to the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can include at least one of the features, either explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0036] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium between the first and second features.

[0038] It should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right", and the like used herein are for illustrative purposes only and are not intended to be the only implementation.

[0039] In the formula, the physical quantity, if not marked separately, should be understood as the basic quantity of the basic unit of the International System of Units, or the derived quantity derived from the basic quantity by multiplication, division, differentiation or integration, etc. Mathematical operation.

[0040] Embodiment:

[0041] Reference Figures 1-6 A valve seat ring pressing device for an engine cylinder head, comprising a feeding mechanism 1, a receiving mechanism 2, a pressing mechanism 3 and a receiving seat 4, the receiving mechanism 2 is installed on the receiving seat 4, the receiving mechanism 2 is communicated with the discharge port 11 of the feeding mechanism 1, and is used for bearing the seat ring 8 from the feeding mechanism 1, the receiving mechanism 2 comprises left and right clamping blocks 21 and 22, the left and right clamping blocks 21 and 22 are rotationally connected with the receiving seat 4 through a rotating shaft 23 installed on the receiving seat 4, and the opposite ends of the left and right clamping blocks 21 and 22 are respectively provided with left and right limiting grooves 211 and 221, the left and right limiting grooves 211 and 221 are oppositely arranged and matched with the seat ring 8, the pressing mechanism 3 comprises a servo press 31 and a pressing rod 32 connected with the servo press 31, when the seat ring 8 is pressed onto the cylinder head, the servo press 31 drives the pressing rod 32 to pass between the left and right limiting grooves 211 and 221 and press the seat ring 8 into the cylinder head; a bushing 7 is installed in the receiving seat 4, the pressing rod 32 is in sliding fit with the bushing 7, so that the stability and smoothness of the operation of the pressing rod 32 are maintained, and the servo press 31 is installed on the receiving seat 4.

[0042] The control assembly 5 is arranged on the receiving mechanism 2, and two sets of control assemblies 5 are arranged. Each control assembly 5 cooperates with the corresponding left clamping block 21 and right clamping block 22 and the pressing rod 32 to limit the opening and closing of the left clamping block 21 and right clamping block 22 on the receiving seat 4.

[0043] As shown in Figure 4 When the pressing rod 32 is not extended and the left clamping block 21 and right clamping block 22 are in a closed state under the cooperation of the control assembly 5, the distance between the left limiting groove 211 and right limiting groove 221 cooperates with the outer diameter of the race 8,

[0044] As shown in Figure 5 When the pressing rod 32 is extended and the left clamping block 21 and right clamping block 22 are in an open state under the cooperation of the control assembly 5, the distance between the left limiting groove 211 and right limiting groove 221 is greater than the diameter of the race 8, so as not to affect the race 8 taken away by the pressing rod 32.

[0045] Referring to Figures 3-5 , the control assembly 5 includes a spring 51 and a limiting pin 52. One end of the spring 51 abuts against the receiving seat 4, and the other end abuts against the end of the corresponding left clamping block 21 or right clamping block 22 away from the discharge port 11, so as to force the left clamping block 21 and right clamping block 22 to approach each other at the end close to the discharge port 11, thereby being in a closed state. The limiting pin 52 is installed on the corresponding left clamping block 21 or right clamping block 22 and one end of the limiting pin 52 abuts against the receiving seat 4 when the left clamping block 21 and right clamping block 22 are in a closed state, thereby limiting the minimum distance between the left limiting groove 211 and right limiting groove 221 in a closed state through the limiting pin 52. At this time, the distance between the left limiting groove 211 and right limiting groove 221 is slightly larger than the outer diameter of the race 8, the width of the left limiting groove 211 and right limiting groove 221 cooperates with the width of the race 8, and the width of the left limiting groove 211 and right limiting groove 221 can be slightly larger than the width of the race 8 without affecting the action of switching the left clamping block 21 and right clamping block 22 from a closed state to an open state, thereby limiting the position of the race 8 through the cooperation of the left limiting groove 211 and right limiting groove 221 and keeping the consistency of the position and posture of the race 8, and further bearing the race 8 falling from the discharge port 11 through the cooperation of the left limiting groove 211 and right limiting groove 221.

[0046] Referring to 2- Figure 6, the compression rod 32 comprises a rod part 321 and a head part 322, the rod part 321 and the head part 322 are integrally formed, the diameter of the rod part 321 is larger than the diameter of the head part 322, the outer diameter of the head part 322 matches the inner diameter of the seat ring 8, so that the seat ring 8 can be placed on the head part 322 of the compression rod 32 when the head part 322 of the compression rod 32 is inserted into the seat ring 8 and under the blocking force of the left limiting groove 211 and the right limiting groove 221, the left clamping block 21 and the right clamping block 22 are respectively provided with a left roller 212 and a right roller 222, the minimum distance between the left roller 212 and the right roller 222 is larger than the outer diameter of the head part 322 of the compression rod 32 and smaller than the outer diameter of the rod part 321 of the compression rod 32, when the rod part 321 is not in contact with the left roller 212 and the right roller 222, the lower left clamping block 21 and the right clamping block 22 are in a closed state, when the rod part 321 is in contact with the left roller 212 and the right roller 222, the lower left clamping block 21 and the right clamping block 22 are in an open state; a transition part 323 is arranged between the head part 322 and the rod part 321, the outer diameter of the transition part 323 is larger than the outer diameter of the head part 322 and smaller than the outer diameter of the rod part 321, the outer diameter of the transition part 323 is slightly larger than the distance between the left roller 212 and the right roller 222 and smaller than the distance between the left roller 212 and the right roller 222 in the open state, so that the transition part 323 is in contact with the left roller 212 and the right roller 222 when the transition part 323 is in the transition between the closed state and the open state of the left clamping block 21 and the right clamping block 22.

[0047] Reference 2- Figure 6 , in the process of moving the compression rod 32 towards the seat ring 8, the head part 322 of the compression rod 32 first contacts the seat ring 8 without contacting the left roller 212 and the right roller 222, at the same time when the head part 322 just contacts the seat ring 8, the side surface of the transition part 323 contacts the left roller 212 and the right roller 222, so that the left clamping block 21 and the right clamping block 22 begin to slightly open outward, when the head part 322 completely penetrates into the inner diameter of the seat ring 8, the rod part 321 contacts the left roller 212 and the right roller 222, so that the left clamping block 21 and the right clamping block 22 are completely opened, so that the left limiting groove 211 and the right limiting groove 221 completely separate from the seat ring 8, thereby avoiding blocking the compression rod 32 with the seat ring 8 towards the cylinder cover. The arrangement of the transition part 323 makes the process of the compression rod 32 contacting the seat ring 8 and the process of the compression rod 32 taking the seat ring 8 away from the material receiving seat 4 more stable and smooth.

[0048] Reference Figure 6, in order to further avoid the contact between the head 322 and the left roller 212 and the right roller 222, the head 322 is provided with a relief gap 3221, which is arranged on the side of the head 322 close to the left roller 212 and the right roller 222, thereby further reducing the risk of contact between the head 322 and the left roller 212 and the right roller 222, and ensuring the stability of the position of the race 8 in the left limiting groove 211 and the right limiting groove 221 before the head 322 contacts the race 8;

[0049] In order to make the transition part 323 more stable and smooth with the left roller 212 and the right roller 222, the transition part 323 is provided with a transition surface 3231 close to the left roller 212 and the right roller 222, and the distance between the outer diameters of the transition surfaces 3231 on both sides gradually increases until it extends to the rod part 321, thereby making the left and right rollers 222 more stable in the transition from the closed state to the open state when contacting the transition part 323, and slowly linearly opening the left clamping block 21 and the right clamping block 22, reducing the impact on the race 8 during the opening process;

[0050] The head 322 of the pressing rod 32 is embedded with a magnet, which is used to adsorb the race 8 on the head 322 of the pressing rod 32, so that there is a magnetic force on the race 8 when the head 322 of the pressing rod 32 just contacts the race 8, which further reduces the impact of the left clamping block 21 and the right clamping block 22 on the race 8 during the gradual opening process, and also improves the stability of the head 322 of the pressing rod 32 when inserting into the race 8, so that the head 322 is more easily inserted into the inner diameter of the race 8.

[0051] Reference Figure 2 and Figure 3Also included is a reject assembly 6 arranged in the moving direction of the presser rod 32, the reject assembly 6 includes a reject cylinder 61 and a reject claw 62 mounted on the reject cylinder 61, the reject cylinder 61 can be a finger cylinder, the reject cylinder 61 is bolted on one side of the receiving seat 4, the reject claw 62 is used to clamp and reject the failed seat ring 8 on the presser rod 32, after the presser rod 32 finishes pressing the seat ring 8, the servo press 31 resets the presser rod 32, when the head 322 of the presser rod 32 moves to the position of the reject claw 62, the presser rod 32 stops moving, the reject cylinder 61 controls the clamping action of the reject claw 62, that is, the reject claw 62 closes, but the reject claw 62 does not contact the head 322, that is, if there is a seat ring 8 on the head 322, the position of the reject claw 62 when it closes can clamp the seat ring 8, if there is no seat ring 8 on the head 322, even if the reject claw 62 closes, it will not contact the head 322, the servo press 31 continues to run to reset the presser rod 32 to the position, and the reject claw 62 resets. By setting the reject claw 62, even if the seat ring 8 fails to be pressed, the reject claw 62 can clamp and discard the seat ring 8, avoiding affecting the presser rod 32 and the next seat ring 8.

[0052] Operation process: the manipulator moves the cylinder cover to be processed to the designated processing position, the seat ring 8 falls into the space composed of the left limiting groove 211 and the right limiting groove 221 through the discharge port 11 of the feeding mechanism 1, at this time, the left clamping block 21 and the right clamping block 22 are in the closed state, then the servo press 31 drives the pressing rod 32 to move towards the seat ring 8, the head 322 of the pressing rod 32 contacts the seat ring 8 without contacting the left roller 212 and the right roller 222, at the same time, the transition part 323 of the pressing rod 32 contacts the left roller 212 and the right roller 222, so as to force the left roller 212 and the right roller 222 to rotate with the left clamping block 21 and the right clamping block 22 respectively, so that the left clamping block 21 and the right clamping block 22 gradually move away from each other at the left limiting groove 211 and the right limiting groove 221 at the end of the left clamping block 21 and the right clamping block 22 close to the discharge port 11, at this time, it is the transition state between the closed state and the open state, along with the head 322 of the pressing rod 32 extending into the seat ring 8 until completely extending into the seat ring 8, at this time, the rod part 321 of the pressing rod 32 has contacted the left roller 212 and the right roller 222, so as to force the left clamping block 21 and the right clamping block 22 to reach the maximum open state, at this time, it is in the open state, then the servo press 31 continues to control the pressing rod 32 to move towards the cylinder cover with the seat ring 8 until the seat ring 8 is pressed and mounted on the cylinder cover. Then the servo press 31 controls the pressing rod 32 to reset, the head 322 of the pressing rod 32 stays for a short time at the ejection pawl 62, the ejection pawl 62 acts, then the servo press 31 continues to control the pressing rod 32 to reset, when the pressing rod 32 no longer contacts the left roller 212 and the right roller 222, the left clamping block 21 and the right clamping block are forced to approach each other at the end close to the discharge port 11 under the action of the spring 51, until the limiting pin 52 contacts the material receiving seat 4 to prevent the left clamping block 21 and the right clamping block 22 from approaching each other, at this time, it is reset to the closed state again, the servo press 31 controls the pressing rod 32 to reset until it is reset to the position, and the next cycle begins.

[0053] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation obtained by using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A valve seat press-fitting device for an engine cylinder head, characterized in that, include: The feeding mechanism (1), receiving mechanism (2), pressing mechanism (3), and receiving seat (4) are provided. The receiving mechanism (2) is mounted on the receiving seat (4) and is connected to the discharge port (11) of the feeding mechanism (1). It is used to carry the seat ring (8) from the feeding mechanism (1). The receiving mechanism (2) includes a left clamping block (21) and a right clamping block (22). Both the left clamping block (21) and the right clamping block (22) are rotatably connected to the receiving seat (4). 22) A left limiting groove (211) and a right limiting groove (221) are respectively provided on one side of the opposite end. The left limiting groove (211) and the right limiting groove (221) are arranged opposite to each other and cooperate with the seat ring (8). The pressing mechanism (3) includes a servo press (31) and a pressing rod (32) connected to the servo press (31). When the seat ring (8) is pressed onto the cylinder head, the servo press (31) drives the pressing rod (32) to pass between the left limiting groove (211) and the right limiting groove (221) and presses the seat ring (8) into the cylinder head. The receiving mechanism (2) is provided with a control component (5), and the control component (5) and the pressure rod (32) cooperate with the corresponding left clamping block (21) and right clamping block (22) to control the opening and closing of the left clamping block (21) and right clamping block (22) on the receiving seat (4); When the pressure rod (32) is not extended and the left clamping block (21) and the right clamping block (22) are in a closed state with the cooperation of the control component (5), the distance between the left limiting groove (211) and the right limiting groove (221) in the closed state is matched with the outer diameter of the seat ring (8); When the pressure rod (32) extends and the left clamping block (21) and right clamping block (22) are in an open state with the cooperation of the control component (5), the distance between the left limiting groove (211) and the right limiting groove (221) is greater than the diameter of the seat ring (8) when the opening state is in the open state.

2. The valve seat press-fitting device for an engine cylinder head according to claim 1, characterized in that: The left clamping block (21) and the right clamping block (22) are rotatably connected to the receiving seat (4) via a rotating shaft (23) on the receiving seat (4). The control component (5) includes a spring (51) and a limiting pin (52). One end of the spring (51) abuts against the receiving seat (4), and the other end abuts against the end of the corresponding left clamping block (21) or right clamping block (22) away from the discharge port (11), thereby forcing the end of the left clamping block (21) and the right clamping block (22) near the discharge port (11) to be in a closed state. The limiting pin (52) is set on the corresponding left clamping block (21) and right clamping block (22), and when the left clamping block (21) and the right clamping block (22) are in a closed state, one end of the limiting pin (52) abuts against the receiving seat (4), thereby ensuring the minimum distance between the left limiting groove (211) and the right limiting groove (221) when in a closed state.

3. The valve seat press-fitting device for an engine cylinder head according to claim 1, characterized in that: The pressure rod (32) includes a rod portion (321) and a head (322). The diameter of the rod portion (321) is larger than the diameter of the head (322). The head (322) cooperates with the seat ring (8). When the head (322) of the pressure rod (32) is inserted into the seat ring (8), the seat ring (8) is placed on the head (322) of the pressure rod (32).

4. A valve seat press-fitting device for an engine cylinder head according to claim 3, characterized in that: The left clamping block (21) and the right clamping block (22) are respectively equipped with a left roller (212) and a right roller (222). The minimum distance between the left roller (212) and the right roller (222) is greater than the outer diameter of the head (322) of the pressure rod (32) and less than the outer diameter of the rod (321) of the pressure rod (32). When the head (322) is inserted into the seat ring (8), the rod (321) contacts the left roller (212) and the right roller (222), forcing the left roller (212) and the right roller (222) to move away from each other and be in an open state, thereby avoiding obstructing the movement of the pressure rod (32).

5. A valve seat press-fitting device for an engine cylinder head according to claim 4, characterized in that: A transition portion (323) is provided between the head (322) and the rod (321), wherein the outer diameter of the transition portion (323) is larger than the outer diameter of the head (322) and smaller than the outer diameter of the rod (321).

6. A valve seat press-fitting device for an engine cylinder head according to claim 5, characterized in that: The head (322) is provided with a clearance notch (3221), which is located on the side of the head (322) near the left roller (212) and the right roller (222). The transition part (323) is provided with a transition surface (3231) with the left roller (212) and the right roller (222) on the side near the left roller (212) and the right roller (222).

7. A valve seat press-fitting device for an engine cylinder head according to any one of claims 3-6, characterized in that: The head (322) of the pressure rod (32) is embedded with a magnet, which is used to attract the seat ring (8) to the head (322) of the pressure rod (32).

8. A valve seat press-fitting device for an engine cylinder head according to claim 1, characterized in that: It also includes a material rejection assembly (6) disposed in the moving direction of the pressure rod (32). The material rejection assembly (6) includes a material rejection cylinder (61) and a material rejection claw (62) disposed on the material rejection cylinder (61). The material rejection cylinder (61) is disposed on one side of the receiving seat (4). The material rejection claw (62) is used to clamp and reject the seat ring (8) that failed to be pressed on the pressure rod (32).

9. A valve seat press-fitting device for an engine cylinder head according to claim 1, characterized in that: The receiving seat (4) is provided with a bushing (7), and the pressure rod (32) is slidably engaged with the bushing (7).

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