Precise clamp for machining semicircular arc structure of swash plate seat

Abstract

The utility model relates to a precise clamp for processing a semicircular structure of a swash plate seat, which aims to solve the technical problems that the semicircular structure of the swash plate seat is difficult to process and poor in precision, and adopts the technical scheme that the precise clamp comprises a clamp body, a positioning mechanism and a clamping mechanism, the clamp body comprises a bottom plate, a vertical plate, a supporting plate and a top plate, the vertical plate is of a rectangular frame-shaped structure, the vertical plate and the supporting plate are fixedly arranged on the bottom plate, the top plate is fixedly arranged on the vertical plate, the side wall of the inner frame is an installation face, the two sides are tool withdrawal grooves, and a kidney-shaped groove is formed in the supporting plate; the positioning mechanism comprises a positioning plate and a positioning ring, the positioning plate is fixedly arranged on the mounting surface, and the positioning ring is fixedly arranged on the positioning plate; the clamping mechanism comprises a hinge support, a cylindrical pin, a pressing plate, an eyelet bolt, a shoulder nut and a spring, the hinge support is fixedly arranged on the bottom plate and the top plate, the pin hole end of the pressing plate is hinged to the hinge support, the shoulder nut is in threaded connection with the eyelet bolt, the eyelet bolt is hinged to the middle of the pressing plate, and the spring is arranged on the eyelet bolt in a sleeving mode. In the machining process, manual operation and adjustment are not needed, the precision of the clamp is directly guaranteed, manual operation errors are reduced, and the machining quality stability of parts is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of machining fixtures for hydraulic piston pump parts, specifically relating to a precision fixture for machining the semi-circular arc structure of a swashplate seat. Background Technology

[0002] In hydraulic piston pumps, the swashplate seat's semi-circular arc structure supports the swashplate's rotation, allowing for angle changes to regulate the pump's displacement. The inner and outer semi-circular arc structures of the swashplate seat are designed as a pair, rotating relative to each other during the pump's continuous variable displacement process, while constantly rubbing against one another. The outer semi-circular arc's machining accuracy can be ensured through grinding, making it easy to machine. However, due to the swashplate seat's unique structure, the fixture design for the inner semi-circular arc is challenging, making it difficult to guarantee machining accuracy. If the swashplate seat's semi-circular arc's accuracy is out of tolerance, abnormal wear will occur during relative movement with the swashplate, leading to component failure and affecting the piston pump's variable displacement response characteristics. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide a precision fixture for machining the semi-circular arc structure of a swashplate seat.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A precision fixture for machining the semi-circular arc structure of a swashplate seat includes a fixture body, a positioning mechanism, and a clamping mechanism;

[0006] The clamping device includes a base plate, two upright plates, two support plates, and a top plate. The upright plates are rectangular frame structures. The two upright plates are vertically fixed to the front and rear sides of the top of the base plate, respectively. The two support plates are vertically fixed to the left and right sides of the base plate between the two upright plates. The top plate is fixed to the top surface of the two upright plates. The middle of the left and right side walls of the inner frame of the upright plates is a protruding mounting surface, and the two sides of the mounting surface are relief grooves. The upper and lower parts of the support plates are symmetrically provided with waist-shaped grooves.

[0007] The positioning mechanism includes two positioning plates and two positioning rings. The two positioning plates are symmetrically fixed to the mounting surfaces on both sides by screws, and the two positioning rings are symmetrically fixed to the two positioning plates by a number of positioning pins.

[0008] The clamping mechanism includes four hinge supports, eight cylindrical pins, four pressure plates, four hinge bolts, four shoulder nuts, and four springs. The four hinge supports are symmetrically fixed to the top surface of the bottom plate and the bottom surface of the top plate within the inner frame of the clamping body. One end of each pressure plate has a pin hole, and the other end has a bent hook structure. The pin hole ends of the four pressure plates are hinged to the four hinge supports through cylindrical pins, and the bent hook ends are free ends. One end of each shoulder nut is threaded onto a hinge bolt. The other ends of the four hinge bolts pass through waist-shaped grooves and are hinged to the middle of the four pressure plates through cylindrical pins. The four springs are respectively sleeved on the hinge bolts between the clamping body and the pressure plates.

[0009] Furthermore, a connecting alignment hole is provided between the support plate and the positioning plate.

[0010] Furthermore, the top plate is evenly provided with several hoisting holes.

[0011] Furthermore, the support plate and positioning plate around the alignment hole are provided with several connected screw holes, and several adjusting screws pass through the screw holes in sequence through the support plate and positioning plate.

[0012] Furthermore, a washer is fitted on the hinge bolt between the shoulder nut and the support plate.

[0013] Furthermore, the precision fixture is mounted on a horizontal machining table.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model uses a clamping mechanism to fix the swashplate seat and a positioning mechanism to perform precise positioning. No manual operation or adjustment is required during the processing, as the accuracy of the fixture directly guarantees the process, reducing human error and improving the stability of the processing quality of the parts.

[0016] 2. This utility model is installed on a horizontal machining table. By rotating the horizontal machining table 180 degrees, the semi-circular arc machining of two slant plate seats can be completed in one clamping, which ensures the positional accuracy of the arcs on both sides and doubles the machining efficiency.

[0017] 3. The fixture structure of this utility model is compact, and while ensuring machining accuracy, it also takes into account the ease of use. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the swashplate support component;

[0019] Where 'a' is a side view of the swashplate component;

[0020] b is a schematic diagram of the main structure of the swashplate component;

[0021] Figure 2 This is a schematic diagram of the clamping body structure of this utility model;

[0022] Figure 3 A schematic diagram of the structure after the swashplate is installed;

[0023] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure;

[0024] In the diagram: 1. Clamping body; 2. Positioning mechanism; 3. Clamping mechanism; 4. Swashplate base;

[0025] 11. Base plate; 12. Vertical plate; 121. Mounting surface; 122. Relief groove; 13. Support plate; 131. Alignment hole; 132. Waist-shaped groove; 14. Top plate; 141. Lifting hole;

[0026] 21. Positioning plate; 22. Positioning ring; 23. Positioning pin; 24. Adjusting screw;

[0027] 31. Hinge support; 32. Cylindrical pin; 33. Pressure plate; 34. Hinged bolt; 35. Shoulder nut; 36. Spring; 37. Washer;

[0028] 41. Semi-circular arc structure; 42. Side guard. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] like Figure 1-4 As shown, a precision fixture for machining the semi-circular arc structure of a swashplate includes a fixture body 1, a positioning mechanism 2, and a clamping mechanism 3.

[0031] The clamping body 1 includes a base plate 11, two upright plates 12, two support plates 13, and a top plate 14. The upright plates 12 are rectangular frame structures. The two upright plates 12 are vertically fixed to the front and rear sides of the top of the base plate 11, respectively. The two support plates 13 are vertically fixed to the left and right sides of the base plate 11 between the two upright plates 12. The top plate 14 is fixed to the top surface of the two upright plates 12, and a plurality of lifting holes 141 are evenly distributed on the top plate 14. The inner frame of the upright plates 12 is located on the left... The middle of the right side wall has a protruding mounting surface 121, and the two sides of the mounting surface 121 have tool relief grooves 122. The middle of the support plate 13 has a connecting alignment hole 131. The support plate 13 and the positioning plate 21 around the alignment hole 131 have several connecting screw holes. Several adjusting screws 24 pass through the screw holes in sequence through the support plate 13 and the positioning plate 21. The alignment hole 131 has symmetrical waist-shaped grooves 132 above and below. The clamping body 1 is installed on the horizontal machining worktable.

[0032] The positioning mechanism 2 includes two positioning plates 21 and two positioning rings 22. The two positioning plates 21 are symmetrically fixed on the mounting surfaces 121 on both sides by screws, and the two positioning rings 22 are symmetrically fixed on the two positioning plates 21 by a number of positioning pins 23.

[0033] The clamping mechanism 3 includes four hinge supports 31, eight cylindrical pins 32, four pressure plates 33, four hinge bolts 34, four shoulder nuts 35, and four springs 36. The four hinge supports 31 are symmetrically fixed to the top surface of the bottom plate 11 and the bottom surface of the top plate 14 inside the inner frame of the clamping body 1. One end of the pressure plate 33 is provided with a pin hole, and the other end is a bent hook structure. The pin hole end of the four pressure plates 33 is hinged to the four hinge supports 31 through the cylindrical pins 32, and the bent hook end is a free end. The shoulder nuts 35 are threaded to one end of the hinge bolts 34. The other ends of the four hinge bolts 34 pass through the waist-shaped grooves 132 and are hinged to the middle of the four pressure plates 33 through the cylindrical pins 32. The four springs 36 are respectively sleeved on the hinge bolts 34 between the clamping body 1 and the pressure plates 33. Washers 37 are sleeved on the hinge bolts 34 between the shoulder nuts 35 and the support plate 13.

[0034] The working process of this utility model:

[0035] In use, the two swashplate seats 4 are respectively clamped in the middle of the positioning rings 22 on the left and right sides. The position of the swashplate seats 4 can be aligned through the alignment hole 131 to prevent installation deviation. By turning the shoulder nut 35, the hinge bolt 34 is moved left and right, which in turn drives the pressure plate 33 to rotate around the hinge support 31, so that the bent hook end of the pressure plate 33 tightly presses the upper and lower semi-circular arc structure 41 of the swashplate seat 4, fixing the swashplate seat 4. By adjusting the shoulder nut 35, the strength of the swashplate seat 4 can be achieved. The adjusting screw 24 is inserted into the screw hole on the support plate 13 and the positioning plate 21 to support the middle of the swashplate seat 4. After it is fixed, the machining tool extends from the relief groove 122 to process the semi-circular arc structure 41 of the swashplate seat 4. By rotating the horizontal machining table 180°, the upper semi-circular arc processing of two parts can be completed in one clamping, which can ensure the positional accuracy of the arcs on both sides.

[0036] After processing, the hinge bolt 34 can be moved inward by the shoulder nut 35, causing the pressure plate 33 to rotate inward, loosening the swashplate seat 4, removing it, and completing the processing operation;

[0037] Washer 37 can shorten the tightening or loosening stroke of hinge bolt 34, enabling pressure plate 33 to quickly loosen and clamp.

[0038] After the device is used, it can be moved through the hoisting hole 141.

Claims

1. A precision fixture for machining the semi-circular arc structure of a swashplate seat, characterized in that, It includes a clamping body (1), a positioning mechanism (2), and a clamping mechanism (3); The clamping body (1) includes a base plate (11), two upright plates (12), two support plates (13) and a top plate (14). The upright plates (12) are rectangular frame structures. The two upright plates (12) are vertically fixed on the front and rear sides of the top of the base plate (11). The two support plates (13) are vertically fixed on the left and right sides of the base plate (11) between the two upright plates (12). The top plate (14) is fixed on the top surface of the two upright plates (12). The middle of the left and right side walls of the inner frame of the upright plate (12) is a protruding mounting surface (121). The two sides of the mounting surface (121) are relief grooves (122). The upper and lower parts of the support plates (13) are symmetrically provided with waist-shaped grooves (132). The positioning mechanism (2) includes two positioning plates (21) and two positioning rings (22). The two positioning plates (21) are symmetrically fixed on the mounting surfaces (121) on both sides by screws, and the two positioning rings (22) are symmetrically fixed on the two positioning plates (21) by a number of positioning pins (23). The clamping mechanism (3) includes four hinge supports (31), eight cylindrical pins (32), four pressure plates (33), four hinge bolts (34), four shoulder nuts (35), and four springs (36). The four hinge supports (31) are symmetrically fixed to the top surface of the bottom plate (11) and the bottom surface of the top plate (14) inside the inner frame of the clamping body (1), respectively. One end of the pressure plate (33) is provided with a pin hole, and the other end is a bent hook structure. The four pressure plates (33) are symmetrically fixed to the top surface of the bottom plate (11) and the bottom surface of the top plate (14) inside the inner frame of the clamping body (1). 3) The pin hole end is hinged to four hinge supports (31) by a cylindrical pin (32), and the bent hook end is a free end. The shoulder nut (35) is threaded to set one end of the hinge bolt (34). The other end of the four hinge bolts (34) passes through the waist groove (132) and is hinged to the middle of the four pressure plates (33) by a cylindrical pin (32). The four springs (36) are respectively sleeved on the hinge bolts (34) between the clamp body (1) and the pressure plate (33).

2. The precision fixture for machining the semi-circular arc structure of a swashplate seat according to claim 1, characterized in that, The support plate (13) and the positioning plate (21) are provided with a connecting alignment hole (131).

3. The precision fixture for machining the semi-circular arc structure of a swashplate seat according to claim 1, characterized in that, The top plate (14) has several hoisting holes (141) evenly distributed on it.

4. A precision fixture for machining the semi-circular arc structure of a swashplate seat according to claim 2, characterized in that, The support plate (13) and positioning plate (21) around the alignment hole (131) have several connected screw holes, and several adjusting screws (24) pass through the screw holes in sequence through the support plate (13) and positioning plate (21).

5. A precision fixture for machining the semi-circular arc structure of a swashplate seat according to claim 1, characterized in that, A washer (37) is fitted on the hinge bolt (34) between the shoulder nut (35) and the support plate (13).

6. A precision fixture for machining the semi-circular arc structure of a swashplate seat according to claim 1, characterized in that, The precision fixture is mounted on a horizontal machining worktable.

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