Positioning pin press-fitting mechanism

Abstract

The utility model relates to the technical field of engines, in particular to a locating pin press-fitting mechanism which comprises a machine frame body, a sliding assembly and a press-fitting device, the press-fitting device is in transmission connection with the machine frame body through the sliding assembly, and the press-fitting device comprises a supporting plate, a pre-pressing air cylinder, an elastic assembly, a press-fitting assembly and a locating assembly. The positioning assembly comprises a positioning part and a pin guiding part, the axis of the press-fitting assembly coincides with the axis of the pin guiding part, and a first guiding through hole used for guiding the press-fitting assembly is formed in the orthographic projection position, on the positioning plate, of the press-fitting assembly. A certain gap is formed between the conical block and the supporting plate, the gap can compensate the error of the positioning assembly on the machine body in the second direction, the elastic assembly can compensate the error of the positioning assembly on the machine body in the first direction, and therefore the positioning pin can be completely aligned with a pin hole in the machine body.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a positioning pin press-fitting mechanism. Background Art

[0002] The engine block and cylinder head are positioned with locating pins. Before installing the cylinder head, the locating pins must be installed on the engine block. To ensure installation accuracy, the engine block and the locating pins are interference fit. At the station where the engine block is automatically installed with locating pins, the engine block stops at a large position deviation on the roller table due to the poor consistency of the pallet on which the engine block is placed, and the locating pins are fixed in position, which results in the locating pins not being fully aligned with their pin holes, making it easy for the locating pins to not fit into the pin holes of the engine block. Utility Model Content

[0003] The utility model discloses a positioning pin press-fitting mechanism, which is used for eliminating the position error between the positioning pin and the pin hole of a machine body, so that the positioning pin can be accurately press-fitted into the pin hole of the machine body.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] The utility model provides a positioning pin press-fitting mechanism, comprising: a frame body, a sliding component, and a press-fitting device;

[0006] The press-fitting device is transmission-connected to the frame body through the sliding assembly. The press-fitting device has a press-fitting position and a non-press-fitting position relative to the frame body. When the press-fitting device is in the press-fitting position, the press-fitting device is in contact with the frame body. When the press-fitting device is in the non-press-fitting position, the press-fitting device does not interfere with the frame body.

[0007] The press-fitting device comprises a support plate, a pre-pressing cylinder, a connecting shaft, a conical block, a locking nut, an elastic component, a press-fitting component, and a positioning component;

[0008] The support plate is fixedly connected to the sliding assembly, the pre-stressing cylinder is arranged on the support plate and is used to connect with the press assembly, the pre-stressing cylinder is used to drive the press assembly to reciprocate in a first direction, and the first direction is the normal direction of the support plate, the elastic component is arranged on the side of the support plate away from the pre-stressing cylinder, and is connected with a positioning plate, the elastic component is used to buffer the force of the positioning plate in the first direction, and is used to compensate for the error of the positioning assembly on the machine body in the first direction, the connecting shaft is used to connect the positioning plate and the support plate, and a tapered hole for installing the connecting shaft is provided on the support plate, and the size of the tapered hole is larger than the size of the connecting shaft, The conical block and the locking nut are both arranged on the side of the connecting shaft away from the support plate, and the conical block and the conical hole have a certain gap, and the gap between the conical block and the conical hole is used to compensate for the error between the support plate and the body in a second direction, and the second direction is perpendicular to the first direction. A cylindrical hole for installing the connecting shaft is provided on the support plate, the size of the cylindrical hole is larger than the size of the connecting shaft, and the cylindrical hole is connected to the conical hole, and the locking nut is used to lock the conical block and the connecting shaft, and the positioning assembly is arranged on the side of the positioning plate away from the support plate, and the gap between the cylindrical hole and the connecting shaft is larger than the error between the positioning assembly and the body.

[0009] Wherein, when the press-fitting assembly is in a non-press-fitting position, the positioning plate is parallel to the support plate; and when the press-fitting assembly is in a press-fitting position, the positioning plate is parallel to the machine body.

[0010] The present application is provided with a pre-stressing cylinder, a press-fitting assembly and a positioning assembly, which further converts the error between the locating pin and the pin hole on the machine body into the gap between the positioning assembly and the support plate, and the gap between the floating pin sleeve and the pin sleeve seat. In addition, the assembly of the locating pin in the present application is divided into three parts: rough positioning, pre-stressing fine positioning and press-fitting, wherein the rough positioning is achieved by the positioning assembly, while the pre-stressing fine positioning is that the pre-stressing cylinder drives the press-fitting assembly to move to a position close to the locating pin. In addition, the setting of the press-fitting assembly in the present application can make the locating pin completely perpendicular to the pin hole on the machine body when entering the positioning assembly. The addition of the conical block, due to a certain gap between the conical block and the support plate, and this gap can compensate for the error of the positioning assembly on the machine body in the second direction. Specifically, when the positioning assembly in the present application is in contact with the machine body, and the support plate and the machine body have a certain deviation, since the gap between the cylindrical hole and the connecting shaft is larger than the gap between the positioning assembly and the machine body The error between the two, so the positioning component will fall into the hole opened in the body under the action of gravity, and the misalignment error generated by the positioning component in the process of falling will cause the positioning plate to shake, and this part of the shaking caused by the misalignment error will be compensated by the gap between the tapered block and the tapered hole, and the gap between the connecting shaft and the cylindrical hole, to ensure that the positioning pin falls smoothly into the body. In addition, the elastic component can compensate for the error of the positioning component on the body in the first direction on the one hand, and can also buffer the impact force of the positioning pin in the process of rough positioning on the other hand. The force exerted by the press-fitting component on the positioning pin ensures that the force in the pre-pressing process is from small to large, so that the positioning pin can be completely aligned with the pin hole on the upper surface of the body.

[0011] Optionally, the positioning assembly includes a positioning portion and a pin guide portion, the positioning portion has a first end away from the positioning plate, the pin guide portion has a second end away from the positioning plate, the first end and the second end are in the same plane, and the plane is parallel to the positioning plate, the axis of the press-fitting assembly coincides with the axis of the pin guide portion, and the press-fitting assembly is provided with a first guide through hole for avoiding the press-fitting assembly at the positive projection position on the positioning plate.

[0012] Optionally, the pressing device also includes a movable plate, a guide rod, a sliding sleeve, an upper plate and a floating joint. The guide rod is arranged on the positioning plate and connected to the upper plate. The movable plate is arranged between the upper plate and the positioning plate and is used to install the pressing assembly. The pre-pressing cylinder is connected to the movable plate through the floating joint. The floating joint is used to compensate for the deviation between the positioning plate and the movable plate. The guide rod passes through the movable plate. The pre-pressing cylinder is used to drive the movable plate to reciprocate on the guide rod. The sliding sleeve is arranged at the connection between the movable plate and the guide rod. The movable plate is always parallel to the positioning plate.

[0013] Optionally, the positioning pin pressing mechanism also includes a nail blowing tube, a nail pushing cylinder and a nail cutting plate, the nail blowing tube is arranged on the positioning plate, and the nail blowing tube and the positioning plate are spaced apart so that there is a gap between the lower end of the nail blowing tube and the positioning plate, the nail cutting plate is arranged between the nail blowing tube and the positioning plate, and there is a gap between the lower end of the nail cutting plate and the positioning plate, the nail pushing cylinder is arranged on the positioning plate, and the nail cutting plate is arranged at the output end of the nail pushing cylinder, the nail cutting plate has a positioning pin channel hole set through, the nail cutting plate has a first station and a second station, when the nail cutting plate is in the first station, the orthographic projection of the nail blowing tube on the positioning plate coincides with the positioning pin channel hole, when the nail cutting plate is in the second station, the positioning pin channel hole coincides with the first guide through hole, and the nail pushing cylinder is used to drive the nail cutting plate to switch between the first station and the second station.

[0014] Optionally, the press-fitting assembly includes a press-fitting base, a driving member, a spring, a pressure plate and a hammer head, the press-fitting base is arranged on the movable plate, the pressure plate is arranged on the side of the press-fitting base away from the movable plate, the hammer head is arranged inside the press-fitting base, and one end thereof passes through the press-fitting base and the pressure plate in sequence and partially protrudes out of the pressure plate, the spring is sleeved on the peripheral side of the hammer head and is arranged inside the second accommodating groove.

[0015] Optionally, the pin guide portion includes a pin sleeve seat, a compensation piece, and a pin sleeve cover. The pin sleeve seat is arranged on the positioning plate, and a second guide through hole is opened inside the pin sleeve seat. The second guide through hole and the first guide through hole penetrate to form a channel, and the size of the channel is larger than the size of the positioning pin. The compensation piece is annularly arranged on the side wall of the second guide through hole, and the pin sleeve cover is arranged on the side of the pin sleeve seat away from the positioning plate, and a guide opening corresponding to the second guide through hole is opened on the pin sleeve cover.

[0016] Optionally, the compensating member includes a floating pin sleeve and an O-ring, the floating pin sleeve is annularly arranged on a side wall of the second guide through hole, and the O-ring is arranged inside the floating pin sleeve.

[0017] Optionally, the positioning portion includes a positioning shaft and a guide end head, the positioning shaft is arranged on the positioning plate, the guide end head is arranged on a side of the positioning shaft away from the positioning plate, and the guide end head has a guide surface.

[0018] Optionally, the elastic component includes a disc spring and a gasket, and there are two gaskets, which are respectively arranged at two ends of the disc spring away from each other, one of the gaskets is in contact with the support plate, and the other gasket is in contact with the positioning plate.

[0019] Optionally, the sliding assembly includes a sliding rail and a sliding block, wherein the sliding rail is disposed on the rack body and is slidably connected to the sliding block. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a positioning pin press-fitting mechanism provided by the utility model;

[0021] Figure 2 A schematic structural diagram of a press-fit device in a positioning pin press-fit mechanism provided by the utility model;

[0022] Figure 3 The utility model is a schematic diagram of a body of a positioning pin press-fitting mechanism.

[0023] Among them: 1-frame body, 2-slide rail, 3-slider, 4-pressing device, 5-body, 6-pre-pressing cylinder, 7-support plate, 8-guide rod, 9-sliding sleeve, 10-upper plate, 11-moving plate, 12-floating joint, 13-tapered block, 14-locking nut, 15-connecting shaft, 16-pressing base, 17-hammer, 18-driving member, 19-spring, 20-pressure plate, 21-nail blowing tube, 22-nail cutting plate, 23-promoting cylinder, 24-positioning plate, 25-pin sleeve seat, 26-floating pin sleeve, 27-O-ring, 28-pin sleeve cover, 29-positioning pin, 30-positioning shaft, 31-guide end, 32-disc spring, 33-gasket, 34-main bolt hole, 35-pin hole, 36-sliding assembly. DETAILED DESCRIPTION

[0024] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.

[0025] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0026] like Figure 1 , Figure 2 As shown, the embodiment of the utility model provides a positioning pin press-fitting mechanism, comprising: a frame body 1, a sliding assembly 36, and a press-fitting device 4;

[0027] The press-fit device 4 is connected to the frame body 1 through a sliding assembly 36. The press-fit assembly has a press-fit position and a non-press-fit position relative to the frame body 1. When the press-fit assembly is in the press-fit position, the press-fit assembly contacts the machine body 5. When the press-fit assembly is in the non-press-fit position, the press-fit assembly does not interfere with the machine body 5.

[0028] The press-fit device 4 includes a support plate 7, a pre-pressing cylinder 6, a connecting shaft 15, a conical block 13, a locking nut 14, an elastic component, a press-fit component, and a positioning component;

[0029] The support plate 7 is fixedly connected to the sliding assembly 36, the pre-pressing cylinder 6 is arranged on the support plate 7 and is used to connect with the press-fitting assembly, the pre-pressing cylinder 6 is used to drive the press-fitting assembly to reciprocate in the first direction, and the first direction is the normal direction of the support plate 7, the elastic component is arranged on the side of the support plate 7 away from the pre-pressing cylinder 6, and is connected with a positioning plate 24, the elastic component is used to buffer the force of the positioning plate 24 in the first direction, and is used to compensate for the error of the positioning assembly on the machine body 5 in the first direction, the connecting shaft 15 is used to connect the positioning plate 24 and the support plate 7, and a tapered hole for installing the connecting shaft 15 is opened on the support plate 7, and the taper of the tapered hole is the same as the taper of the tapered block 13, and the size of the tapered hole is larger than the connecting shaft 15. The size of the connecting shaft 15, the conical block 13 and the locking nut 14 are all arranged on the side of the connecting shaft 15 away from the support plate 7, and the conical block 13 and the conical hole have a certain gap. The gap between the conical block 13 and the conical hole is used to compensate for the error between the support plate 7 and the body 5 in the second direction. The second direction is perpendicular to the first direction. A cylindrical hole for installing the connecting shaft 15 is opened on the support plate 7. The size of the cylindrical hole is larger than the size of the connecting shaft 15, and the cylindrical hole is connected to the conical hole. The locking nut 14 is used to lock the conical block 13 and the connecting shaft 15. The positioning assembly is arranged on the side of the positioning plate 24 away from the support plate 7, and the gap between the cylindrical hole and the connecting shaft 15 is larger than the error between the positioning assembly and the body 5.

[0030] When the press-fitting assembly is in a non-press-fitting position, the positioning plate 24 is parallel to the support plate 7 , and when the press-fitting assembly is in a press-fitting position, the positioning plate 24 is parallel to the machine body 5 .

[0031] The locking nut 14 is used to lock the conical block 13 and the connecting shaft 15. The positioning assembly is arranged on the side of the positioning plate 24 away from the supporting plate 7. The gap between the conical block 13 and the conical hole is used to compensate for the error of the positioning assembly on the machine body 5.

[0032] The present application is provided with a pre-pressing cylinder 6, a pressing assembly and a positioning assembly, which further converts the error between the positioning pin 29 and the pin hole 35 on the body 5 into a gap between the positioning assembly and the support plate 7, and a gap between the floating pin sleeve 26 and the pin sleeve seat 25. In addition, the assembly of the locating pin 29 in the present application is divided into three parts: rough positioning, pre-pressing fine positioning and press fitting, wherein the rough positioning is achieved through the positioning assembly, while the pre-pressing fine positioning is that the pre-pressing cylinder 6 drives the press fitting assembly to move to a position close to the locating pin 29. In addition, the setting of the press fitting assembly in the present application can enable the locating pin 29 to be completely perpendicular to the pin hole 35 on the machine body 5 when entering the positioning assembly. On this basis, the locating pin 29 is completely perpendicular to the pin hole 35 on the machine body 5 when entering the locating pin channel hole. The addition of the conical block 13 has a certain gap between the conical block 13 and the support plate 14, and this gap can compensate for the error of the positioning assembly on the machine body 5 in the second direction. Specifically, when the positioning assembly in the present application is in contact with the machine body 5 and the support plate 7 has a certain deviation from the machine body 5, due to the cylindrical hole and The gap between the connecting shafts 15 is larger than the error between the positioning assembly and the body 5. Therefore, the positioning assembly will fall into the hole opened on the body 5 under the action of gravity, and the misalignment error generated by the positioning assembly during the falling process will cause the positioning plate 24 to shake due to misalignment. This part of the shaking due to the misalignment error will be compensated by the gap between the conical block 13 and the conical hole, and the gap between the connecting shaft 15 and the cylindrical hole, to ensure that the positioning pin 29 falls smoothly into the body 5. In addition, the elastic component can compensate for the error of the positioning assembly on the body 5 in the first direction on the one hand, and can also buffer the impact force of the positioning pin 29 during the rough positioning process on the other hand. The force exerted by the press-fitting component on the positioning pin 29 ensures that the force during the pre-pressing process increases from small to large, so that the positioning pin 29 can be fully aligned with the pin hole 35 on the upper surface of the body 5.

[0033] In a possible implementation, it is worth noting that the first direction in the present application is the Z direction shown in the figure, and the second direction is the X and Y directions in the figure.

[0034] For a possible implementation, see Figure 2The positioning assembly includes a positioning portion and a pin guide portion, the positioning portion has a first end away from the positioning plate 24, the pin guide portion has a second end away from the positioning plate 24, the first end and the second end are in the same plane, and the plane is parallel to the positioning plate 24, the axis of the press-fitting assembly coincides with the axis of the pin guide portion, and the press-fitting assembly is provided with a first guide through hole for avoiding the press-fitting assembly at the positive projection position on the positioning plate 24.

[0035] In one possible implementation, the positioning portion includes a positioning shaft 30 and a guide end head 31. The positioning shaft 30 is arranged on the positioning plate 24, and the guide end head 31 is arranged on the side of the positioning shaft 30 away from the positioning plate 24. The guide end head 31 has a guide surface. The present application uses the guide end head 31 with a guide surface to enable the guide end head 31 of the positioning shaft 30 to first enter the main bolt hole 34 on the upper surface of the body 5 when the positioning portion is in the process of descending. As the pressing device 4 continues to descend, guided by the guide end head 31 of the positioning shaft 30, the cylindrical part of the positioning shaft 30 will enter the main bolt hole 34 on the upper surface of the body 5. At this time, the lower surface of the positioning shaft 30 and the lower surface of the pin sleeve cover 28 are both in contact with the upper surface of the body 5, but there is a certain error between the positioning pin channel hole of the floating pin sleeve 26 and the pin hole 35 on the upper surface of the engine.

[0036] For a possible implementation, see Figure 2 The elastic component includes a disc spring 32 and a gasket 33. The gasket 33 has two gaskets 33, which are respectively arranged at two ends of the disc spring 32 that are far away from each other. One gasket 33 is in contact with the support plate 7, and the other gasket 33 is in contact with the positioning plate 24. In the above structure, the present application adds an elastic component consisting of a disc spring 32 and a gasket 33, wherein the gasket 33 is mainly used to install the disc spring 32, which is arranged at two ends of the disc spring 32 that are far away from each other. At the same time, in the first direction (the Y direction in the figure), the disc spring 32 has a certain elastic property and can exert a certain reverse force on the pre-stressing cylinder 6 during the process of the pre-stressing cylinder 6 descending. On the one hand, it ensures that the force exerted by the press-fitting component on the locating pin 29 increases from small to large. On the other hand, the non-parallelism between the upper surface of the body 5 and the support plate 7 in the Z direction is compensated by the compression of the disc spring 32, so that the locating pin 29 can be fully aligned with the pin hole 35 on the upper surface of the body 5.

[0037] For a possible implementation, see Figure 2The press-fitting device 4 also includes a moving plate 11, a guide rod 8, a sleeve 9, an upper plate 10 and a floating joint 12. The guide rod 8 is arranged on the positioning plate 24 and connected to the upper plate 10. The moving plate 11 is arranged between the upper plate 10 and the positioning plate 24 and is used to install the press-fitting assembly. The pre-pressing cylinder 6 is connected to the moving plate 11 through the floating joint 12. The floating joint 12 is used to compensate for the deviation between the positioning plate 24 and the moving plate 11. The guide rod 8 passes through the moving plate 11. The pre-pressing cylinder 6 is used to drive the moving plate 11 to reciprocate on the guide rod 8. The sleeve 9 is arranged at the connection between the moving plate 11 and the guide rod 8. The movable plate 11 is always parallel to the positioning plate 24, wherein the upper plate 10 is mainly used to limit the maximum displacement distance of the movable plate 11, and the sliding sleeve 9 ensures that the movable plate 11 can slide better on the guide rod 8. In addition, during the process of the pre-stressing cylinder 6 driving the positioning assembly to press down, when there is a deviation between the positioning assembly and the machine body 5, causing the positioning plate 24 to tilt, the guide rod 8 can ensure that the movable plate 11 always remains parallel to the positioning plate 24, and the addition of the floating joint 12 can better compensate for the deviation between the positioning plate 24 and the movable plate 11, thereby ensuring the normal pre-installation of the positioning pin 29.

[0038] For a possible implementation, see Figure 2 , Figure 3 The positioning pin 29 press-fitting mechanism also includes a nail blowing tube 21, a push-selling cylinder 23 and a nail cutting plate 22. The nail blowing tube 21 is arranged on the positioning plate 24, and the nail blowing tube 21 and the positioning plate 24 are arranged at intervals so that there is a gap between the lower end of the nail blowing tube 21 and the positioning plate 24. The nail cutting plate 22 is arranged between the nail blowing tube 21 and the positioning plate 24. There is a gap between the lower end of the nail cutting plate 22 and the positioning plate 24. The push-selling cylinder 23 is arranged on the positioning plate 24. The nail cutting plate 22 is arranged at the output end of the push-selling cylinder 23. The nail cutting plate 22 has a positioning pin channel hole that is arranged through it. The nail cutting plate 22 has a first station and a second station. When the nail cutting plate 22 is in the first station, the positive projection of the nail blowing tube 21 on the positioning plate 24 coincides with the positioning pin channel hole. When When the nail cutting plate 22 is in the second station, the locating pin channel hole coincides with the first guide through hole, and the push cylinder 23 is used to drive the nail cutting plate 22 to switch between the first station and the second station. When the present application is in use, the nail cutting plate 22 is in the first station by default, wherein the locating pin 29 falls into the nail cutting plate 22 through the nail blowing tube 21, and at this time the lower surface of the locating pin 29 contacts the locating plate 24, and then the nail cutting plate 22 is pushed to the pressing pin position, i.e. the second station, by the push cylinder 23. At this time, the locating pin 29 will automatically enter the locating pin channel hole of the floating pin sleeve 26 by gravity and fall above the pin hole 35 on the upper surface of the body 5. In addition, there is a certain gap between the locating pin channel hole and the outer diameter of the locating pin 29, and this gap enables the locating pin 29 to pass smoothly.

[0039] For a possible implementation, see Figure 2 , Figure 3The press-fitting assembly includes a press-fitting base 16, a driving member 18, a spring 19, a pressure plate 20 and a hammer head 17. The press-fitting base 16 is arranged on the movable plate 11, and the pressure plate 20 is arranged on the side of the press-fitting base 16 away from the movable plate 11. The hammer head is arranged inside the press-fitting base 16, and one end thereof passes through the press-fitting base 16 and the pressure plate 20 in sequence, and partially protrudes out of the pressure plate 20. The spring 19 is arranged on the peripheral side of the hammer head 17 and is arranged inside the second accommodating groove. In the above structure, the hammer head 17 in the present application is installed just above the first guide through hole on the positioning plate 24, and the hammer head 17 is installed in the press-fitting base 16. A spring 19 is arranged between the press-fitting base 16 and the hammer head 17. When the pre-pressing cylinder 6 drives the press-fitting base 16 to descend, the guide rod 8 is used to ensure its position accuracy, so that the hammer head 17 accurately falls into the positioning pin channel hole provided in the nail cutting plate 22, and the end surface of the hammer head 17 5, and the locating pin 29 is pressed into the upper surface of the body 5. The locating pin 29 is pressed into the upper surface of the body 5 by the pressure of the hammer head 17.

[0040] For a possible implementation, see Figure 2 The pin guide portion includes a pin sleeve seat 25, a compensating piece, and a pin sleeve cover 28. The pin sleeve seat 25 is arranged on the positioning plate 24, and a second guide through hole is opened inside the pin sleeve seat 25. The second guide through hole and the first guide through hole are penetrated to form a channel. The size of the channel is larger than the size of the positioning pin 29. The compensating piece is annularly arranged on the side wall of the second guide through hole. The pin sleeve cover 28 is arranged on the side of the pin sleeve seat 25 away from the positioning plate 24. A guide opening corresponding to the second guide through hole is opened on the pin sleeve cover 28. In the above structure, the compensating piece of the present application is annularly arranged to form a second guide through hole. When the positioning pin 29 is installed, the deviation between the positioning pin channel hole and the pin hole 35 on the upper surface of the body 5 is compensated by the elastic deformation of the compensating piece of its outer ring.

[0041] In one possible implementation, the compensation part includes a floating pin sleeve 26 and an O-ring 27. The floating pin sleeve 26 is annularly arranged on the side wall of the second guide through hole, and the O-ring 27 is arranged inside the floating pin sleeve 26. The present application sets the compensation part as a floating pin sleeve 26 and an O-ring 27, so that the elastic properties of the floating pin sleeve 26 and the O-ring 27 themselves can be utilized to compensate for the deviation between the locating pin channel hole and the pin hole 35 on the upper surface of the body 5 through the elastic deformation of the floating pin sleeve 26 and the O-ring 27, so that the locating pin channel hole of the floating pin sleeve 26 is aligned with the position of the pin hole 35 on the upper surface of the body 5, so that the locating pin 29 can be installed inside the pin hole 35.

[0042] In one possible implementation, the sliding assembly 36 includes a slide rail 2 and a slider 3, the slide rail 2 is arranged on the frame body 1, and the press-fitting device 4 moves up and down on the frame body 1 through the sliding assembly 36, and its power can be driven by a cylinder and a motor screw.

[0043] In one possible implementation method, after the locating pin 29 is aligned with the pin hole 35 of the body 5, a driving part 18 such as an impact cylinder, a servo press or a gas-liquid booster cylinder is used to press the locating pin 29 into the pin hole 35 on the upper surface of the body 5 to complete the assembly. During the assembly process of the locating pin 29, the nail cutting plate 22 should be kept in the pin pressing position during the process of the locating pin 29 being pressed into the body 5 until the press-fitting is completed, the pre-pressing cylinder 6 drives the hammer head 17 to rise, the hammer head 17 withdraws from the locating pin channel hole, the push cylinder 23 is reset, and the press-fitting device 4 is switched to the non-press-fitting station to prepare for the next press-fitting.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A positioning pin press-fitting mechanism, characterized in that: include: Rack body, sliding assembly, press-fit device; The press-fitting device is transmission-connected to the frame body through the sliding assembly. The press-fitting device has a press-fitting position and a non-press-fitting position relative to the frame body. When the press-fitting device is in the press-fitting position, the press-fitting device is in contact with the frame body. When the press-fitting device is in the non-press-fitting position, the press-fitting device does not interfere with the frame body. The press-fitting device comprises a support plate, a pre-pressing cylinder, a connecting shaft, a conical block, a locking nut, an elastic component, a press-fitting component, and a positioning component; The support plate is fixedly connected to the sliding assembly, the pre-stressing cylinder is arranged on the support plate and used to be connected to the press-fitting assembly, the pre-stressing cylinder is used to drive the press-fitting assembly to reciprocate in a first direction, and the first direction is the normal direction of the support plate, the elastic component is arranged on the side of the support plate away from the pre-stressing cylinder, and is connected to a positioning plate, the elastic component is used to buffer the force of the positioning plate in the first direction, and is used to compensate for the error of the positioning assembly on the machine body in the first direction, the connecting shaft is used to connect the positioning plate and the support plate, and a tapered hole for installing the connecting shaft is provided on the support plate, and the taper of the tapered hole is the same as the taper of the tapered block, and the size of the tapered hole is greater than The size of the connecting shaft, the conical block and the locking nut are both arranged on the side of the connecting shaft away from the support plate, and the conical block and the conical hole have a certain gap, the gap between the conical block and the conical hole is used to compensate for the error between the support plate and the body in a second direction, the second direction is perpendicular to the first direction, a cylindrical hole for mounting the connecting shaft is provided on the support plate, the size of the cylindrical hole is larger than the size of the connecting shaft, and the cylindrical hole is connected to the conical hole, the locking nut is used to lock the conical block and the connecting shaft, the positioning assembly is arranged on the side of the positioning plate away from the support plate, and the gap between the cylindrical hole and the connecting shaft is larger than the error between the positioning assembly and the body; Wherein, when the press-fitting assembly is in a non-press-fitting position, the positioning plate is parallel to the support plate; and when the press-fitting assembly is in a press-fitting position, the positioning plate is parallel to the machine body.

2. The positioning pin press-fitting mechanism according to claim 1, characterized in that: The positioning assembly includes a positioning portion and a pin guide portion, the positioning portion has a first end away from the positioning plate, the pin guide portion has a second end away from the positioning plate, the first end and the second end are in the same plane, and the plane is parallel to the positioning plate, the axis of the press-fitting assembly coincides with the axis of the pin guide portion, and a first guide through hole for guiding the press-fitting assembly is opened at the positive projection position of the press-fitting assembly on the positioning plate.

3. The positioning pin press-fitting mechanism according to claim 1, characterized in that: The pressing device also includes a movable plate, a guide rod, a sliding sleeve, an upper plate and a floating joint. The guide rod is arranged on the positioning plate and connected to the upper plate. The movable plate is arranged between the upper plate and the positioning plate and is used to install the pressing assembly. The pre-pressing cylinder is connected to the movable plate through the floating joint. The floating joint is used to compensate for the deviation between the positioning plate and the movable plate. The guide rod passes through the movable plate. The pre-pressing cylinder is used to drive the movable plate to reciprocate on the guide rod. The sliding sleeve is arranged at the connection between the movable plate and the guide rod. The movable plate is always parallel to the positioning plate.

4. The positioning pin press-fitting mechanism according to claim 2, characterized in that: The positioning pin pressing mechanism also includes a nail blowing tube, a pushing cylinder and a nail cutting plate, the nail blowing tube is arranged on the positioning plate, and the nail blowing tube and the positioning plate are spaced apart so that there is a gap between the lower end of the nail blowing tube and the positioning plate, the nail cutting plate is arranged between the nail blowing tube and the positioning plate, and there is a gap between the lower end of the nail cutting plate and the positioning plate, the pushing cylinder is arranged on the positioning plate, the nail cutting plate is arranged at the output end of the pushing cylinder, the nail cutting plate has a positioning pin channel hole set through, the nail cutting plate has a first station and a second station, when the nail cutting plate is in the first station, the orthographic projection of the nail blowing tube on the positioning plate coincides with the positioning pin channel hole, when the nail cutting plate is in the second station, the positioning pin channel hole coincides with the first guide through hole, and the pushing cylinder is used to drive the nail cutting plate to switch between the first station and the second station.

5. The positioning pin press-fitting mechanism according to claim 3, characterized in that: The press-fitting assembly includes a press-fitting base, a driving member, a spring, a pressure plate and a hammer head. The press-fitting base is arranged on the movable plate, and the pressure plate is arranged on a side of the press-fitting base away from the movable plate. The hammer head is arranged inside the press-fitting base, and one end thereof passes through the press-fitting base and the pressure plate in sequence and partially protrudes out of the pressure plate. The spring is arranged on the peripheral side of the hammer head.

6. The positioning pin press-fitting mechanism according to claim 2, characterized in that: The pin guide portion includes a pin sleeve seat, a compensation piece, and a pin sleeve cover. The pin sleeve seat is arranged on the positioning plate, and a second guide through hole is opened inside the pin sleeve seat. The second guide through hole and the first guide through hole penetrate to form a channel, and the size of the channel is larger than the size of the positioning pin. The compensation piece is annularly arranged on the side wall of the second guide through hole, and the pin sleeve cover is arranged on the side of the pin sleeve seat away from the positioning plate, and a guide opening corresponding to the second guide through hole is opened on the pin sleeve cover.

7. The positioning pin press-fitting mechanism according to claim 6, characterized in that: The compensating member comprises a floating pin sleeve and an O-ring. The floating pin sleeve is annularly arranged on the side wall of the second guide through hole, and the O-ring is arranged inside the floating pin sleeve.

8. The positioning pin press-fitting mechanism according to claim 2, characterized in that: The positioning part comprises a positioning shaft and a guide end head, wherein the positioning shaft is arranged on the positioning plate, the guide end head is arranged on a side of the positioning shaft away from the positioning plate, and the guide end head has a guide surface.

9. The positioning pin press-fitting mechanism according to claim 1, characterized in that: The elastic component includes a disc spring and a gasket. There are two gaskets, which are respectively arranged at two ends of the disc spring that are far away from each other. One of the gaskets is in contact with the support plate, and the other gasket is in contact with the positioning plate.

10. The positioning pin press-fitting mechanism according to claim 1, characterized in that: The sliding assembly comprises a sliding rail and a sliding block. The sliding rail is arranged on the frame body and is slidably connected with the sliding block.

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