Manual press

Abstract

The utility model relates to the field of assembly, and provides a manual press, which comprises a frame, a hand wheel, a screw rod, a connecting piece and a pressure head, the screw rod is screwed on the frame, one end of the screw rod is provided with a square head, the square head is adaptively connected with the hand wheel, the other end of the screw rod is provided with a ball head, the ball head is adaptively connected with the upper end of the connecting piece, and the connecting piece rotates around the central axis of the screw rod. The lower end of the connecting piece is connected with the upper end of the pressure head. Through adaptive connection of the cross beam, the sleeve and the screw rod, the pressing head can move up and down by rotating the hand wheel, the relative distance is adjusted, the operation space is adjusted according to different products, the movement stroke of the screw rod is large, and the assembly requirements of large-size products can be met; the device is easy to operate and firm in fixation, the screw moves downwards, the product is pressed by the pressing head, reliable clamping fixation and downward pressing force are provided in the vertical direction, and the precision assembly quality of spaceflight valve products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of assembly, in particular to a manual press. Background Art

[0002] With the development of new-generation launch vehicle technology, aerospace valve structures are becoming increasingly complex, and the assembly precision requirements for aerospace valve products are also becoming increasingly higher. In general assembly situations, products are generally clamped and fixed using equipment such as bench vises and flat-nose pliers, which can only provide horizontal clamping force and have a small clamping size. However, in the precision assembly of products in fields such as aerospace valves, there is a need to clamp or apply force in the vertical direction in critical situations such as avoiding spring torsion during spring mechanism assembly and separating the nozzle and valve to avoid damage during nozzle assembly. This requires a larger clamping size and a higher degree of precision. Therefore, since general operating equipment cannot provide vertical fixation, does not have a large motion stroke and accuracy, it has significant limitations and cannot meet the needs of aerospace valve assembly.

[0003] The assembly of aerospace valve products requires a device that can apply a certain pressure in the vertical direction with high precision, and needs to have a large clamping size and good rigidity and weight. It is necessary equipment in the fields of anti-torsion assembly of spring mechanisms of aerospace valves, anti-seizure assembly of take-over nozzles, precision cold pressing of valve discs, disassembly and assembly of components, and constant torque tightening, ensuring the precision assembly quality of aerospace valve products. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a manual press.

[0005] According to the utility model, a manual press is provided, comprising: a frame, a handwheel, a screw, a connecting piece and a pressing head. The screw is screwed to the frame, a square head is provided at one end of the screw, the square head is adapted to be connected to the handwheel, a ball head is provided at the other end of the screw, the ball head is adapted to be connected to the upper end of the connecting piece, the connecting piece rotates around the central axis of the screw, and the lower end of the connecting piece is connected to the upper end of the pressing head.

[0006] Preferably, the ball head of the screw is fitted into the mounting hole at the upper end of the connector through a clearance of the half end cover, the half end cover is semicircular, and the connecting rod is free to rotate around the center axis of the screw.

[0007] Preferably, the lower end of the connecting piece is in the shape of a ball head with a groove, and the lower end of the connecting piece is fitted into the hole on the upper end of the pressure head through the clearance of the second screw, and the second screw is connected to the slot at the lower end of the connecting piece, and the pressure head swings around the second screw at a certain angle.

[0008] Preferably, a square hole is provided in the center of the handwheel, the square hole is clearance-matched with the square head of the screw, and the handwheel is fixedly connected to the square head of the screw through a third locking nut.

[0009] Preferably, the cross section of the pressure head is H-shaped.

[0010] Preferably, the frame includes a base plate, a support rod, a crossbeam and a sleeve, one end of the support rod is threadedly connected to the base plate, the other end of the support rod is threadedly connected to the crossbeam, the crossbeam is threaded with a sleeve, and the sleeve is threadedly connected to the screw rod.

[0011] Preferably, threads are respectively provided at both ends of the support rod, a pair of parallel planes are provided on the threads, and a step is provided on the inner side of the threads on the other end of the support rod.

[0012] Preferably, threaded holes are provided at both ends of the bottom plate, the threaded holes are adapted to the threads on the support rod, and one end of the support rod is vertically screwed to the bottom plate.

[0013] Preferably, fixing holes are provided at both ends of the beam, which are adapted to the stage on the other end of the support rod. The other end of the support rod passes through the fixing hole, the gasket and the first locking nut in sequence, and the other end of the support rod is fixed to the beam through the first locking nut.

[0014] Preferably, the sleeve is threadedly connected to the middle of the crossbeam, and a shoulder is provided on the upper side of the sleeve, and the shoulder is fixed to the crossbeam through a second locking nut.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) This application uses the adaptive connection of the crossbeam, sleeve and screw to achieve the up and down movement of the pressure head by rotating the hand wheel, realize the relative distance adjustment, and adjust the operating space according to different products. In addition, the screw has a large movement stroke and can adapt to the assembly requirements of large-sized products;

[0017] (2) This application is simple to operate and has a secure fixation. When the screw moves downward, the pressure head presses the product, providing reliable clamping and downward pressure in the vertical direction, thereby ensuring the precision assembly quality of aerospace valve products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 This is a schematic diagram of the press structure of the utility model;

[0020] Figure 2 yes Figure 1 sectional view of .

[0021] The figure shows:

[0022] 1. Base; 2. Support rod; 3. Crossbeam; 4. Flat washer; 5. First locking nut; 6. Handwheel; 7. Third locking nut; 8. Second locking nut; 9. Sleeve; 10. Screw; 11. First screw; 12. Half end cover; 13. Connector; 14. Second screw; 15. Pressure head. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that a person skilled in the art may make various variations and improvements without departing from the scope of the present invention. Such variations and improvements are all within the scope of protection of the present invention.

[0024] Example

[0025] According to the utility model, a manual press is provided. Figure 1 As shown, its cross-sectional view is as follows Figure 2 As shown, it mainly consists of a handwheel 6, a screw rod 10, a crossbeam 3, a support rod 2, a base plate 1, a connector 13, a pressure head 15, a first locking nut 5, a second locking nut 8, a third locking nut 7, a sleeve 9, a half end cover 12, a first screw 11, a second screw 14, and a gasket 4. The base plate 1, the support rod 2, the crossbeam 3, the sleeve 9, and the first locking nut 5 form a fixed square frame assembly; the handwheel 6, the screw rod 10, the connector 13, the pressure head 15, the second locking nut 8, the third locking nut 7, the sleeve 9, the half end cover 12, the first screw 11, and the second screw 14 form a movable assembly; the movable assembly can move upward or downward relative to the square frame assembly by rotating.

[0026] One end of the support rod 2 is threadedly connected to the base plate 1, and the other end of the support rod 2 is threadedly connected to the crossbeam 3. The crossbeam 3 and the support rod 2 are relatively fixed via a gasket 4 and a first locking nut 5. A sleeve 9 is threaded onto the crossbeam 3 and relatively fixed to the crossbeam 3 via a second locking nut 8. The sleeve 9 is threadedly connected to the screw rod 10. One end of the screw rod 10 is provided with a square head, and the center of the handwheel 6 is provided with a square hole. The square hole and the square head of the screw rod 10 are loosely matched. The handwheel 6 is fixedly connected to the square head of the screw rod 10 via a third locking nut 7. The other end of the screw rod 10 is provided with a ball head. The ball head of the screw rod 10 is loosely matched with the mounting hole at the upper end of the connector 13 through a half end cap 12. The half end cap 12 is semicircular, and the connector rod 13 is free to rotate around the central axis of the screw rod 10. The lower end of the connecting member 13 is in the shape of a ball head with a groove. The lower end of the connecting member 13 is loosely fitted in the hole at the upper end of the pressure head 15 through the second screw 14. The cross-section of the pressure head 15 is H-shaped, and the second screw 14 is connected to the slot at the lower end of the connecting member 13. The pressure head 15 swings around the second screw 14 at a certain angle.

[0027] Base plate 1 has a relatively large surface area, thickness, and weight, with a surface roughness of Ra1.6 and a flatness of 0.05. It is made of 2Cr13 stainless steel, and its surface is high-frequency quenched to a hardness of HRC40-48. It is provided with two threaded holes that are clearance-matched with the threads of support rods 2. Support rods 2 are provided with threads at both ends, with a stage provided inside the threads at one end. At the same time, a pair of parallel flat surfaces are provided at each end for clamping support rods 2 when tightening. The two support rods 2 are fixed to base plate 1 via end threads, perpendicular to base plate 1, and parallel to each other. Crossbeam 3 is provided with holes at both ends that are clearance-matched with the stages of support rods 2, and a thread is provided in the middle that is clearance-matched with the external threads of sleeve 9. It is made of 2Cr13 stainless steel. The upper end of support rod 2 passes through the holes at both ends of crossbeam 3, and crossbeam 3 and support rod 2 are fixed to each other by a first locking nut 5, keeping crossbeam 3 horizontal. A threaded hole is provided at the center of the sleeve 9 to fit the screw 10 in a clearance manner, and an external thread and a shaft shoulder are provided on the outer circle; the material is 3Cr13 stainless steel, and the surface is blackened; the sleeve 9 is fixed to the beam 3 through the second locking nut 8.

[0028] One end of the screw 10 is provided with a square head, and the other end is provided with a ball head with a groove, with a stroke of up to 400mm; the material is 3Cr13 stainless steel, and the surface is blackened; the ball head end of the screw 10 passes through the sleeve 9 from top to bottom, and the external thread of the screw 10 cooperates with the internal thread of the sleeve 9, and can move upward or downward by rotation, and can apply a certain force downward. A square hole is provided in the center of the handwheel 6, which is clearance-matched with one end of the screw 10, and is fixed to the screw 10 by the third locking nut 7. A hole is provided in the center of the upper end of the connector 13, which is clearance-matched with the ball head of the screw 10, and four threaded holes are evenly distributed around the hole. A ball head with a groove is provided at the lower end of the connector. The connector 13 is connected to the ball head end of the screw 10 through the half end cover 12 and the first screw 11, and the connector 13 can rotate freely around the central axis. The half end cover 12 is semicircular, and the connector 13 and the screw 10 are fixed by two half end covers 12. The top of the ram 15 is provided with a hole that is a clearance fit with the connector 13, and the outer surface is provided with evenly distributed threaded holes. The ram is fixed to the connector 13 by a second screw 14 that engages the slot of the connector 13. The ram has a certain swing angle, and when it encounters a product or tooling during descent, it can automatically adjust its position to adapt to the plane of the product or tooling.

[0029] This utility model can adjust the operating space according to different products, and the large travel of the screw 10 can adapt to the assembly requirements of large-scale products while ensuring the positioning and clamping accuracy of components. The overall weight and rigidity of the press ensure that products are securely clamped and maintain the fixing ability in applications such as constant torque tightening. This utility model is an essential device for anti-twist assembly of spring mechanisms in aerospace valves, anti-seizure assembly of nozzles, precision cold pressing of valve discs, assembly and disassembly of components, and constant torque tightening, ensuring the precision assembly quality of aerospace valve products.

[0030] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A manual press, characterized in that: include: A frame, a handwheel (6), a screw (10), a connecting piece (13) and a pressing head (15), wherein the screw (10) is screwed onto the frame, one end of the screw (10) is provided with a square head, the square head is adapted to be connected to the handwheel (6), the other end of the screw (10) is provided with a ball head, the ball head is adapted to be connected to the upper end of the connecting piece (13), the connecting piece (13) rotates around the central axis of the screw (10), and the lower end of the connecting piece (13) is connected to the upper end of the pressing head (15).

2. The manual press according to claim 1, characterized in that: The ball head of the screw (10) is loosely fitted into the mounting hole at the upper end of the connector (13) through a half end cover (12); the half end cover (12) is semicircular, and the connector (13) is free to rotate around the central axis of the screw (10).

3. The manual press according to claim 1, characterized in that The lower end of the connecting member (13) is in the shape of a ball head with a groove. The lower end of the connecting member (13) is loosely fitted into the hole at the upper end of the pressure head (15) through a second screw (14). The second screw (14) is connected to the slot at the lower end of the connecting member (13). The pressure head (15) swings around the second screw (14) at a certain angle.

4. The manual press according to claim 1, characterized in that A square hole is provided in the center of the hand wheel (6), and the square hole is clearance-matched with the square head of the screw rod (10). The hand wheel (6) is fixedly connected to the square head of the screw rod (10) via a third locking nut (7).

5. The manual press according to claim 1, characterized in that: The cross section of the pressure head (15) is H-shaped.

6. The manual press according to claim 1, characterized in that: The frame comprises a base plate (1), a support rod (2), a crossbeam (3) and a sleeve (9); one end of the support rod (2) is threadedly connected to the base plate (1); the other end of the support rod (2) is threadedly connected to the crossbeam (3); the sleeve (9) is threadedly connected to the crossbeam (3); and the sleeve (9) is threadedly connected to the screw rod (10).

7. The manual press according to claim 6, characterized in that: The two ends of the support rod (2) are respectively provided with threads, a pair of mutually parallel planes are provided on the threads, and a step is provided on the inner side of the threads on the other end of the support rod (2).

8. The manual press according to claim 6, characterized in that: Threaded holes are provided at both ends of the base plate (1), and the threaded holes are adapted to the threads on the support rod (2). One end of the support rod (2) is vertically screwed to the base plate (1).

9. The manual press according to claim 6, characterized in that: The crossbeam (3) is provided with fixing holes at both ends, and the fixing holes are adapted to the stage on the other end of the support rod (2). The other end of the support rod (2) passes through the fixing holes, the gasket (4) and the first locking nut (5) in sequence, and the other end of the support rod (2) is fixed to the crossbeam (3) through the first locking nut (5).

10. The manual press according to claim 6, characterized in that: The sleeve (9) is threadedly connected to the middle of the crossbeam (3), and a shaft shoulder is provided on the upper side of the sleeve (9), and the shaft shoulder is fixed to the crossbeam (3) through a second locking nut (8).

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