Concave cylinder cover locking plate press-fitting structure

Abstract

The utility model relates to the technical field of engine assembly auxiliary equipment, and provides a concave cylinder cover locking plate press-fitting structure which comprises a pressing head and a material receiving assembly. The pressing head comprises a fan-shaped top plate, a pressing head cylinder is fixedly mounted below the fan-shaped top plate, an adjusting bolt and an ejector rod are sequentially arranged on the inner wall of the pressing head cylinder from top to bottom, a first spring is arranged between the ejector rod and the adjusting bolt, mounting grooves are symmetrically formed in the outer wall of the pressing head cylinder, and clamping jaws are rotatably mounted in the mounting grooves through first pin shafts; a second spring is arranged between the clamping jaw and the side wall of the mounting groove; the material receiving assembly comprises a mounting base, the base is sleeved with a material receiving sleeve, a third spring is arranged between the base and the material receiving sleeve, a material receiving seat is fixedly mounted on the inner wall of the material receiving sleeve, a mandrel is fixedly mounted on the inner wall of the material receiving seat, and locking plates are placed on the two sides of the mandrel; the lower end face of the pressing head is movably connected with the upper end face of the material receiving assembly, interference can be avoided during press fitting, and the clamping jaw can adapt to locking plates of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of engine assembly auxiliary equipment, in particular to a concave cylinder cover locking piece press-fitting structure. Background Art

[0002] During the assembly of the locking plate of the valve mechanism, the locking plate needs to be pressed onto the valve spring seat. During the pressing process, the spring seat needs to be pressed down by overcoming the spring force to expose the valve stem ring groove. The locking plates are stuck into the ring groove in pairs, and then the pressing head is lifted to extend the spring to stick the locking plates onto the spring seat.

[0003] The current valve lock plate press-fitting process uses tooling to press-fit. The force required to compress a single valve spring into place is usually 40KG. The size of a single valve lock plate is about 7.5x5mm. It is difficult to put the valve lock plate in manually and it needs to be picked up with tweezers. Just for a single cylinder head, the work needs to be repeated more than ten times, and the labor intensity is high.

[0004] In order to reduce the intensity of work, a press-fit device for the valve lock piece of an engine cylinder head and its clip assembly, for example, with publication number CN109366135A, is provided. The material is loaded by a clip, and a pair of lock pieces fall from above through a material cutting mechanism. The clamping jaws are controlled by a cylinder to open and close. The clamping jaws are usually closed, and the lock pieces are blocked from falling. During press-fitting, the cylinder controls the clamping jaws to open, the lock pieces fall into position, and the clamping jaws are closed again to press the lock pieces onto the valve stem, thereby reducing the intensity of manual labor.

[0005] The inventors found that the engine cylinder head valve lock plate press-fitting device and its clip assembly with publication number CN109366135A still have the following technical problems:

[0006] (1) Refer to the attached Figure 1 The existing cylinder head has a concave cylinder head. When the existing pressure head is pressed, it needs to press on the valve inside the cylinder head. Therefore, it is necessary to avoid the interference of the four right-angle peripheral surfaces caused by the cross partition on the upper surface of the cylinder head. Figure 2 The invention discloses an engine cylinder head valve lock plate pressing device and a clip assembly with a cross partition and surrounding interference arc surface, and the publication number is CN109366135A. The device will interfere with the cross partition of the concave cylinder head during the pressing process. Specifically, the clamping jaws and other components are installed outside the pressing head, and the opening and closing of the clamping jaws during the pressing process will interfere with the periphery of the cylinder head.

[0007] (2) The lock plate of an engine cylinder head valve lock plate press-fitting device and its clip assembly with publication number CN109366135A is conveyed by gravity inside the pressing head. The conveying track of the lock plate is fixed. The pressing head can only adapt to one type of lock plate. The existing press-fitting structure has poor adaptability to the size of the lock plate. Utility Model Content

[0008] The utility model aims to provide a concave cylinder cover locking piece press-fitting structure, which can solve the technical problems that the existing press-fitting structure has poor adaptability to the size of the locking piece and the press-fitting process will interfere with the concave cylinder cover.

[0009] To achieve the above purpose, the utility model provides a concave cylinder cover lock piece press-fitting structure, including a press head and a material receiving assembly;

[0010] The pressure head comprises a fan-shaped top plate, a pressure head cylinder is fixedly installed below the fan-shaped top plate, an adjusting bolt and a push rod are arranged on the inner wall of the pressure head cylinder from top to bottom, a first spring is arranged between the push rod and the adjusting bolt, a mounting groove is symmetrically arranged on the outer wall of the pressure head cylinder, a clamping jaw is rotatably installed in the mounting groove through a first pin shaft, and a second spring is arranged between the clamping jaw and the side wall of the mounting groove;

[0011] The material receiving assembly comprises a mounting base sleeve, a material receiving sleeve is sleeved on the mounting base, a third spring is arranged between the mounting base and the material receiving sleeve, a material receiving seat is fixedly installed on the inner wall of the material receiving sleeve, a core shaft is fixedly installed on the inner wall of the material receiving seat, and locking sheets are placed on both sides of the core shaft;

[0012] The lower end surface of the pressure head is movably connected to the upper end surface of the material receiving component.

[0013] It is further configured that a docking joint is installed at the bottom end of the pressure head tube, a conical surface is provided in the docking joint, and the pressure head tube is movably connected to the material connection sleeve through the docking joint.

[0014] It is further configured that a first limit groove is opened on the inner wall of the pressure head cylinder, a second limit groove is opened below the first limit groove, the lower end surface of the adjustment bolt can contact the upper end surface of the first limit groove, a baffle is arranged on the top end of the push rod, and the lower end surface of the baffle can contact the upper end surface of the second limit groove.

[0015] It is further configured that the material receiving sleeve is transversely penetrated by a second pin shaft, and the material receiving seat is located above the second pin shaft.

[0016] It is further configured that a third pin is arranged to penetrate the material receiving sleeve, the material receiving seat and the core shaft at the same time, and the third pin is fixedly connected to the material receiving sleeve, the material receiving seat and the core shaft.

[0017] It is further configured that the fan-shaped top plate includes right-angled side surfaces.

[0018] It is further configured that the pressure head and the material receiving seat are made of stainless steel.

[0019] It is further configured that a pressure head profiling space is formed between the inner wall of the clamping jaw and the side wall of the push rod.

[0020] It is further configured that the side wall of the core shaft, the upper end surface of the material receiving seat and the inner wall of the material receiving sleeve form a material receiving space.

[0021] It is further configured that the base is connected to the workbench.

[0022] Beneficial effects of one or more of the above technical solutions:

[0023] (1) In order to adapt to the cylinder head structure, the top plate of the pressing head is set to be fan-shaped. During press-fitting, four pressing heads press-fit the same set of valves. The right-angled sides of the fan-shaped corresponding to the four right-angled peripheral surfaces formed by the word partition can avoid interference during press-fitting. At the same time, the parts are placed inside the pressing head body, which reduces the number of parts and the size of the press-fitting structure, making the structure compact.

[0024] (2) The present application uses a material receiving assembly to receive the locking piece. When taking the material, the pressing head device is pressed onto the material receiving assembly, the material receiving sleeve moves downward, and the upper plane of the material receiving sleeve contacts the lower plane of the pressing head device. During this period, the clamping jaws of the pressing head device open under the action of the locking piece, clamp the conical surface of the locking piece tightly against the top rod, and place the upper surface of the locking piece against the upper surface of the pressing head. When the pressing head is lifted, the locking piece is lifted up together to complete the material taking action. There is no need to set a conveying track in the pressing head for the transfer of the locking piece, and the clamping jaws can adapt to locking pieces of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0026] Figure 1 It is a structural schematic diagram of an existing recessed cylinder head.

[0027] Figure 2 It is a structural schematic diagram of an existing cross partition.

[0028] Figure 3 It is a structural schematic diagram of the utility model.

[0029] Figure 4 It is a structural schematic diagram of the pressure head of the utility model.

[0030] Figure 5 It is a structural schematic diagram of the material receiving seat of the utility model.

[0031] Figure 6 This is a bottom view of the pressure head of the utility model when it is used with the valve assembly.

[0032] In the figure, 1 is a pressure head; 12 is a fan-shaped top plate; 13 is a pressure head cylinder; 14 is an adjusting bolt; 15 is a push rod; 16 is a first spring; 17 is a mounting groove; 18 is a first pin shaft; 19 is a clamping claw; 110 is a second spring; 111 is a third spring; 112 is a butt joint; 113 is a conical surface; 114 is a first limiting groove; 115 is a second limiting groove; 116 is a baffle; 117 is a right-angle side surface; 118 is a pressure head profiling space;

[0033] 2 material receiving assembly; 21 base; 22 material receiving sleeve; 23 material receiving seat; 24 mandrel; 25 third pin shaft; 26 material receiving space; 27 second pin shaft;

[0034] 3 Locking plate; 4 Concave cylinder head; 5 Valve; 6 Cross partition; 7 Right-angle peripheral surface. DETAILED DESCRIPTION

[0035] The specific implementation of this embodiment is described below in conjunction with the accompanying drawings.

[0036] A concave cylinder cover lock piece press-fit structure, refer to Figure 3 , Figure 4 and Figure 5 , comprising a pressing head 1 and a material receiving assembly 2;

[0037] The pressure head 1 comprises a fan-shaped top plate 12, a fan-shaped top plate 13 is fixedly installed below the fan-shaped top plate 12, an adjusting bolt 14 and a push rod 15 are arranged in sequence on the inner wall of the fan-shaped top plate 13 from top to bottom, a first spring 16 is arranged between the push rod 15 and the adjusting bolt 14, a mounting groove 17 is symmetrically arranged on the outer wall of the fan-shaped top plate 13, a clamping jaw 19 is rotatably installed in the mounting groove 17 through a first pin shaft 18, and a second spring 110 is arranged between the clamping jaw 19 and the side wall of the mounting groove 17;

[0038] The material receiving assembly 2 includes a mounting base 21, a material receiving sleeve 22 is sleeved on the mounting base 21, a third spring 111 is arranged between the mounting base 21 and the material receiving sleeve 22, a material receiving cylinder is fixedly installed on the inner wall of the material receiving sleeve 22, a core shaft 24 is fixedly installed on the inner wall of the material receiving cylinder, and locking pieces 3 are placed on both sides of the core shaft 24;

[0039] The lower end surface of the pressing head 1 is movably connected to the upper end surface of the material receiving component 2.

[0040] A butt joint 112 is installed at the bottom end of the fan-shaped top plate 13 , a conical surface 113 is provided in the butt joint 112 , and the fan-shaped top plate 13 is movably connected to the material receiving sleeve 22 through the butt joint 112 .

[0041] A first limiting groove 114 is formed on the inner wall of the fan-shaped top plate 13 , and a second limiting groove 115 is formed below the first limiting groove 114 . The lower end surface of the adjusting bolt 14 can contact the upper end surface of the first limiting groove 114 . A baffle 116 is provided on the top of the top rod 15 , and the lower end surface of the baffle 116 can contact the upper end surface of the second limiting groove 115 .

[0042] The material receiving sleeve 22 is laterally penetrated by a second pin shaft, and the material receiving seat 23 is located above the second pin shaft. The setting of the second pin shaft ensures the limiting of the material receiving sleeve 22 , the material receiving seat 23 and the core shaft 24 .

[0043] At the same time, a third pin shaft 25 is arranged through the material receiving sleeve 22, the material receiving seat 23 and the core shaft 24. The third pin shaft 25 is fixedly connected with the material receiving sleeve 22, the material receiving seat 23 and the core shaft 24 to ensure that the material receiving sleeve 22, the material receiving seat 23 and the core shaft 24 move synchronously.

[0044] See attached Figure 2 and attached Figure 6 The fan-shaped top plate 12 includes a right-angled side surface 117, and the right-angled side surface 117 has the same shape as the right-angled peripheral surface of the cross partition. The fan-shaped top plates 12 of the four pressure heads 1 are arranged corresponding to the four right-angled sides of the cross partition. The four pressure heads 1 can simultaneously press-fit the same set of valves arranged around the cross partition.

[0045] The pressure head 1 and the material receiving seat 23 are made of stainless steel, and the clamping jaws 19 are made of stainless steel to avoid the clamping jaws 19 being magnetized after long-term work, resulting in material failure.

[0046] A pressure head profiling space 118 is formed between the inner wall of the clamping jaw 19 and the side wall of the push rod 15. The pressure head 1 is mainly composed of a pressure head 1 body, a push rod 15 and a pair of clamping jaws 19. The bottom of the pressure head 1 has a pressure head profiling space 118 of the same size as the material receiving seat 23. The clamping jaw 19 is always pressed on the push rod 15 under the action of the spring.

[0047] The side wall of the core shaft 24, the upper end surface of the material receiving seat 23 and the inner wall of the material receiving sleeve 22 form a material receiving space 26. The material receiving sleeve 22 of the material receiving seat 23 and the core shaft 24 are connected as a whole through the third pin shaft 25, move synchronously, and bounce up under the action of the third spring 111. The upper surface of the core shaft 24 is higher than the material receiving seat 23, forming a contoured space for receiving the material. The locking piece 3 falls into the contoured space on the material receiving seat 23 through the loading device.

[0048] The base 21 is connected to the workbench. Four bolt holes are provided on the base 21 and the workbench. The base 21 is fixed to the workbench by studs to ensure stable load-bearing of the material receiving assembly 2 .

[0049] Working principle:

[0050] When taking materials, the ram 1 is pressed onto the receiving seat 23, the receiving sleeve 22 moves downward, and the upper plane of the receiving sleeve 22 contacts the lower plane of the ram 1. During this period, the clamping jaws 19 of the ram 1 are opened under the action of the locking piece 3, the conical surface of the locking piece 3 is clamped tightly on the top rod 15, and the upper surface of the locking piece 3 is placed against the upper surface of the ram 1. When the ram 1 is lifted, the locking piece 3 is lifted together to complete the material taking action.

[0051] During press-fitting, the pressing head 1 is pressed down, and the fan-shaped top plate 12 is aligned with the cross partition 6 of the concave cylinder head 4 and placed into the right-angle peripheral surface 7. When the three edges of the locking plate 3 are aligned with the valve stem ring groove, the pressing head 1 is lifted, and the spring seat rebounds to clamp the locking plate 3, completing the press-fitting of a group of valves 5.

[0052] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A concave cylinder head locking piece press-fitting structure, characterized in that: Including a pressing head and a material receiving assembly; The pressure head comprises a fan-shaped top plate, a pressure head cylinder is fixedly installed below the fan-shaped top plate, an adjusting bolt and a push rod are arranged on the inner wall of the pressure head cylinder from top to bottom, a first spring is arranged between the push rod and the adjusting bolt, a mounting groove is symmetrically arranged on the outer wall of the pressure head cylinder, a clamping jaw is rotatably installed in the mounting groove through a first pin shaft, and a second spring is arranged between the clamping jaw and the side wall of the mounting groove; The material receiving assembly comprises a mounting base, a material receiving sleeve is sleeved on the base, a third spring is arranged between the base and the material receiving sleeve, a material receiving seat is fixedly mounted on the inner wall of the material receiving sleeve, a core shaft is fixedly mounted on the inner wall of the material receiving seat, and locking sheets are placed on both sides of the core shaft; The lower end surface of the pressure head is movably connected to the upper end surface of the material receiving component.

2. The concave cylinder cover locking piece press-fitting structure according to claim 1 is characterized in that: A butt joint is installed at the bottom end of the pressure head cylinder, a conical surface is provided in the butt joint, and the pressure head cylinder is movably connected with the material connection sleeve through the butt joint.

3. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: A first limiting groove is provided on the inner wall of the pressure head cylinder, and a second limiting groove is provided below the first limiting groove. The lower end surface of the adjusting bolt can contact the upper end surface of the first limiting groove. A baffle is provided on the top end of the push rod, and the lower end surface of the baffle can contact the upper end surface of the second limiting groove.

4. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: The material receiving sleeve is transversely penetrated by a second pin shaft, and the material receiving seat is located above the second pin shaft.

5. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: At the same time, a third pin is arranged through the material receiving sleeve, the material receiving seat and the core shaft, and the third pin is fixedly connected with the material receiving sleeve, the material receiving seat and the core shaft.

6. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: The fan-shaped top plate includes right-angled sides.

7. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: The pressure head and the material receiving seat are made of stainless steel.

8. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: A pressure head profiling space is formed between the inner wall of the clamping jaw and the side wall of the push rod.

9. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: The side wall of the core shaft, the upper end surface of the material receiving seat and the inner wall of the material receiving sleeve form a material receiving space.

10. The concave cylinder cover locking piece press-fitting structure according to claim 1, characterized in that: The base is connected to the workbench.

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