Piston assembly equipment for mud pump manufacturing

Abstract

The invention relates to the technical field of slurry pump manufacturing equipment, in particular to piston assembly equipment for slurry pump manufacturing, which comprises a fixed base, a fixture for fixing a piston cylinder is mounted in the center of the top surface of the fixed base, an inverted L-shaped bracket is connected onto the fixed base, and a cylinder is mounted at the front end of the top of the inverted L-shaped bracket; a pressing seat is fixed on an outer sleeve of the spline telescopic rod and is provided with at least four suckers for adsorbing the piston, and a vacuum pump for controlling the suckers to suck and release air is arranged on the top surface of the pressing seat. According to the piston assembly equipment for mud pump manufacturing, the stability of the assembly process is guaranteed through a multiple locking mechanism, when the side face of a piston is clamped by an extrusion wheel, the position of the extrusion wheel can be firmly locked through cooperation of a locking toothed plate and a tooth groove, and piston deviation is avoided; in the conveying stage, the barrel-shaped shell and the piston cylinder are coaxially designed, rolling guide of the extrusion wheel is combined, it is ensured that the piston is accurately inserted into the piston cylinder, and the assembly precision is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slurry pump manufacturing equipment, in particular to a piston assembly equipment for slurry pump manufacturing. BACKGROUND

[0002] In the manufacturing process of the slurry pump, the assembly of the piston and the piston cylinder is a crucial process, and the assembly quality directly affects the working performance, sealing effect and service life of the slurry pump.

[0003] The traditional piston assembly method relies on manual operation, and the operator needs to manually align the piston with the piston cylinder, and then complete the assembly by knocking, pressing and other methods. This method not only has high labor intensity and low assembly efficiency, but also is difficult to meet the demand of large-scale production, and in the assembly process, due to the instability of manual operation, the piston and the piston cylinder are prone to misalignment, which causes damage to the piston or the piston cylinder, affecting the sealing performance and operation reliability of the slurry pump.

[0004] Even if some simple mechanical auxiliary devices are used for assembly in some production scenes, there are still many defects. For example, some devices lack effective piston positioning and clamping mechanisms, and the piston is prone to shift during assembly, affecting the assembly precision; some devices cannot pre-detect the size of the piston, and when the size of the piston does not match the piston cylinder, forced assembly will cause damage to the piston cylinder, increasing production cost. In addition, the existing assembly equipment cannot guarantee the smooth movement of the piston during the piston conveying and inserting into the piston cylinder, which is prone to cause damage to the parts due to excessive impact force, further reducing the assembly quality and production efficiency.

[0005] Therefore, it is of great significance to develop an automatic equipment capable of realizing accurate positioning, stable clamping, size detection and smooth assembly of the piston, for improving the production efficiency and assembly quality of the slurry pump and reducing the production cost. SUMMARY

[0006] The present application aims to provide a piston assembly equipment for slurry pump manufacturing to solve the problem that the existing equipment cannot realize high precision and effectively protect the workpiece. To achieve the above purpose, the present application provides the following technical scheme: a piston assembly equipment for slurry pump manufacturing, comprising a fixed base, a clamp for fixing the piston cylinder is installed at the center of the top surface of the fixed base, a reverse L-shaped support is connected to the fixed base; A gas cylinder is installed at the top front end of the reverse L-shaped support, a key telescopic rod is connected to the lower end of the gas cylinder, a lower pressing seat is fixed on the outer sleeve of the key telescopic rod, at least four suction cups for sucking the piston are provided on the lower pressing seat, and a vacuum pump for controlling the suction and release of the suction cups is installed on the top surface of the lower pressing seat. A cross fixing frame is sleeved on the inner rod of the spline telescopic rod, and two sets of spring damping telescopic rods are hinged on the bottom surface of the cross fixing frame, and the other end of the spring damping telescopic rod is hinged on the outer sleeve of the spline telescopic rod; The four ends of the cross fixing frame are connected to the barrel-shaped shell, which is located above the fixture and coaxial to ensure assembly accuracy. The inner wall of the barrel-shaped shell is connected to the hollow disk, and the top surface of the hollow disk is connected to the coaxial hollow worm wheel. The hollow worm wheel engages with the worm, and one end of the worm is equipped with a bidirectional motor that drives its forward and reverse rotation. The bidirectional motor is set on the barrel-shaped shell; Four guiding inclined grooves for driving the guide rods to slide are opened at the bottom of the hollow disk. The guide rods are slidably connected in the guiding inclined grooves. The lower ends of the guide rods are rotated to be equipped with extrusion rods for clamping the pistons, which slide and penetrate the side walls of the barrel-shaped shell.

[0007] Preferably, the extrusion rod has a vertical through slot toward the center end, a C-shaped slide is slidably connected in the vertical through slot, and a reset spring telescopic rod for driving reset is connected between the vertical plate of the C-shaped slide and the vertical through slot; The two ends of the C-shaped slide are rotatably connected to the extrusion wheels with rolling clamping pistons, and the two ends of the extrusion wheel shaft are provided with annular tooth grooves; A locking tooth plate for locking the extrusion wheel is provided on the front and rear sides of the two horizontal plates of the C-shaped slide plate, and the side of the locking tooth plate facing the extrusion wheel has teeth that cooperate with the annular tooth groove for locking; The locking tooth plate is connected to an I-shaped plate on the side facing away from the extrusion wheel; the I-shaped plate is slidably arranged on the inner side of the C-shaped slide plate, and a first spring telescopic rod is arranged between the I-shaped plate and the C-shaped slide plate to push it to move.

[0008] Preferably, two horizontal plates are mounted on the vertical plate of the C-shaped slide, and the horizontal plates are connected to a second spring telescopic rod providing a reset force, and the other end of the second spring telescopic rod is fixed to the inner wall of the vertical through groove; One end of the horizontal plate away from the extrusion wheel is connected to a retractable spring retractable plate, and the end of the spring retractable plate is an inclined surface for easy contraction.

[0009] Preferably, a receiving groove for receiving the vertical plate of the "I"-shaped plate is opened in the middle of the vertical through groove away from the side of the C-shaped slide; Two rectangular vertical grooves are opened in the vertical through groove, and the two rectangular vertical grooves are located on both sides of the accommodating groove. The rectangular vertical grooves correspond to the horizontal plates one by one to limit the stroke.

[0010] Preferably, the center of the extrusion rod passes through the notched rectangular rod, one end of the notched rectangular rod extends into the accommodating groove and is rotatably connected to two rollers, the other end of the notched rectangular rod is connected to a wedge block that triggers unlocking, and a reset spring that drives reset is connected between the wedge block and the extrusion rod.

[0011] Preferably, the inner plate of the spring telescopic plate is vertically rotated to connect to a rotating rod that reduces resistance.

[0012] Preferably, the top surface of the fixed base is connected to four interference seats that cooperate with the wedge-shaped blocks to unlock, and the interference seats correspond to the wedge-shaped blocks one by one and are located below them.

[0013] Preferably, each group of spring-damping telescopic rods is three, enhancing the stability of the buffer reset.

[0014] Compared with the prior art, the present application has the following beneficial effects: In the present application, the stability of the assembly process is ensured by multiple locking mechanisms: when the extrusion wheel clamps the side of the piston, the locking tooth plate cooperates with the tooth groove to firmly lock the position of the extrusion wheel, avoiding piston deviation; during the conveying stage, the barrel-shaped shell is coaxial with the piston cylinder, combined with the rolling guidance of the extrusion wheel, to ensure the precise insertion of the piston into the piston cylinder, significantly improving the assembly accuracy.

[0015] In the present application, from the clamping and adsorption of the piston to the conveying, assembly and equipment resetting, the whole process is automatically completed by the cooperation of components such as bidirectional motors, air cylinders and vacuum pumps, reducing manual intervention. For example, the clamping and unlocking actions are achieved through motor driving and mechanical structure linkage, and the resetting process does not require manual adjustment, greatly simplifying the operation process and improving the assembly efficiency.

[0016] In the present application, the extrusion wheel clamps the piston in a rolling contact manner, and the outer side is wrapped with a rubber ring, which can reduce the wear on the surface of the piston; the spring-damping telescopic rod and other elastic components provide cushioning during assembly to avoid damage to the piston or piston cylinder caused by hard impact, while the size detection mechanism can prevent damage caused by forced assembly due to incompatible specifications, effectively protecting the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a cross-sectional view of the barrel-shaped shell of the present application; Figure 3 is a schematic diagram of the three-dimensional structure of the cross-shaped fixed frame and the spring-damping telescopic rod of the present application; Figure 4 is a schematic diagram of the three-dimensional development structure of the barrel-shaped shell and the hollow disc of the present application; Figure 5 is a schematic diagram of the three-dimensional structure of the extrusion rod and the vertical slot of the present application; Figure 6 is a cross-sectional view of the extrusion rod of the present application Figure 1 ; Figure 7 is a schematic diagram of the three-dimensional structure of the extrusion rod of the present application Figure 2 ; Figure 8 is an enlarged view of structure A in the present application Figure 7 ; Figure 9 is a schematic diagram of the three-dimensional development structure of the locking tooth plate and the C-shaped slide plate of the present application.

[0018] In the figure: 1, fixed base; 2, clamp; 3, inverted L-shaped support; 4, air cylinder; 5, spline telescopic rod; 51, cross-shaped fixing frame; 52, spring damping telescopic rod; 6, abutting seat; 7, pressing seat; 8, suction cup; 9, vacuum pump; 10, barrel-shaped shell; 101, hollow disc; 102, hollow worm gear; 103, worm; 104, bidirectional motor; 105, motor support; 106, guide inclined groove; 107, guide rod; 108, extrusion rod; 1081, vertical through groove; 1082, C-shaped sliding plate; 1083, extrusion wheel; 1084, tooth groove; 1085, locking tooth plate; 1086, I-shaped plate; 1087, first spring telescopic rod; 1088, reset spring telescopic rod; 11, horizontal plate; 111, second spring telescopic rod; 112, spring telescopic plate; 113, accommodating groove; 114, rectangular vertical groove; 115, notched rectangular rod; 116, roller; 117, wedge-shaped block; 118, reset spring; 12, rotating rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Please refer to Figures 1 to 9 The present application provides a technical solution: a piston assembly device for manufacturing mud pump, which comprises a fixed base 1, the center of the top surface of the fixed base 1 is provided with a clamp 2, the clamp 2 adopts a four-jaw chuck in the prior art, and the specific structure is not described here, the fixed base 1 is fixedly connected with an inverted L-shaped support 3, the front end of the top of the inverted L-shaped support 3 is provided with an air cylinder 4, the air cylinder 4 is arranged downward, and the lower end of the air cylinder 4 is fixedly connected with a spline telescopic rod 5, the side surface of the inner rod of the spline telescopic rod 5 is composed of two arc surfaces and two vertical surfaces staggered, and a pressing seat 7 is fixedly sleeved on the outer sleeve of the spline telescopic rod 5; the piston cylinder is placed in the clamp 2 for clamping by the mechanical arm arranged on the fixed base 1.

[0021] The bottom of the pressing seat 7 is provided with at least four suction cups 8, and the top surface of the pressing seat 7 is provided with a vacuum pump 9 for controlling the suction of the four suction cups 8, and an electromagnetic valve is arranged on the vacuum pump 9, the vacuum pump 9 is enabled to suck air through the electromagnetic valve, so as to make the suction cup 8 adsorb the piston, and when the electromagnetic valve is de-energized, the air path is connected to the atmosphere, the suction cup 8 is released, and the suction cup 8 is separated from the adsorbed piston.

[0022] In the embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 ,Figures 5 to 9 As shown, the inner rod of the spline telescopic rod 5 is sleeved with a cross fixed frame 51, and the four ends of the cross fixed frame 51 are bent downward, and the bottom surface of the cross fixed frame 51 is hinged with two groups of spring damping telescopic rods 52 arranged symmetrically, each group of spring damping telescopic rods 52 is three in number, and the other end of the spring damping telescopic rod 52 is hinged on the vertical surface of the inner rod of the spline telescopic rod 5; when the piston of the suction cup 8 driven by the air cylinder 4 moves downward, if the size of the piston is too large, the piston cannot move downward into the piston cylinder after contacting the top of the piston cylinder, at this time, when the air cylinder 4 is elongated to push the spline telescopic rod 5 to move downward, the cross fixed frame 51 does not move, at this time, the inner rod of the spline telescopic rod 5 moves downward in the inside of the cross fixed frame 51, so that the end of the spring damping telescopic rod 52 moves downward and deflects, through the deflection of the spring damping telescopic rod 52 in advance, the problem of whether the size of the piston matches is detected, and the problem of damage to the piston cylinder due to unqualified piston specifications is avoided.

[0023] The four ends of the cross fixed frame 51 are fixedly connected with a barrel-shaped shell 10, and the barrel-shaped shell 10 is located above the clamp 2 and coaxially arranged with the clamp 2, the inner wall of the barrel-shaped shell 10 is rotatably connected with a hollow disc 101, the top surface of the hollow disc 101 is fixedly connected with a hollow worm wheel 102 coaxial with the hollow disc 101, the hollow worm wheel 102 is meshed with a worm 103, and one end of the worm 103 is provided with a bidirectional motor 104, and the bidirectional motor 104 is installed in a motor support 105 installed outside the barrel-shaped shell 10. The bottom of the hollow disc 101 is provided with four guide inclined grooves 106, and the guide inclined grooves 106 are slidably connected with guide rods 107, and the lower ends of the guide rods 107 are rotatably provided with extrusion rods 108 which are slidably inserted into the side wall of the barrel-shaped shell 10. The hollow disc 101 is rotatably connected with the guide inclined grooves 106 to drive the guide rods 107 to drive the extrusion rods 108 to slide on the barrel-shaped shell 10.

[0024] In this embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, one end of the extrusion rod 108 towards the central axis of the barrel-shaped shell 10 is provided with a vertical through slot 1081, and a C-shaped sliding plate 1082 is horizontally limitingly and slidably connected in the vertical through slot 1081, and a reset spring telescopic rod 1088 is fixedly connected between the vertical plate of the C-shaped sliding plate 1082 and the vertical through slot 1081, and the two ends of the C-shaped sliding plate 1082 are rotatably connected with extrusion wheels 1083, the outer side of the extrusion wheel 1083 is wrapped with a rubber ring to ensure the stability of the extrusion wheel 1083 extruding the surface of the piston, and the two ends of the shaft side of the extrusion wheel 1083 are provided with annular tooth grooves 1084. Locking tooth plates 1085 are provided on both the front and rear sides of the two horizontal plates of the C-shaped slide plate 1082 for limited sliding. The four locking tooth plates 1085 are provided with teeth on the side facing the extrusion wheel 1083 to lock the tooth groove 1084.

[0025] The four locking tooth plates 1085 are fixedly connected to an I-shaped plate 1086 on the side facing away from the extrusion wheel 1083. The I-shaped plate 1086 is slidably set on the C-shaped slide 1082 through the four locking tooth plates 1085, and the I-shaped plate 1086 is located on the inner side of the vertical through groove 1081. A first spring telescopic rod 1087 is provided between the I-shaped plate 1086 and the C-shaped slide 1082.

[0026] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 As shown, two horizontal plates 11 are symmetrically limited and slidably provided on the vertical plate of the C-shaped slide plate 1082, and a second spring telescopic rod 111 is fixedly connected to the horizontal plate 11. The end of the second spring telescopic rod 111 away from the horizontal plate 11 is fixed to the inner wall of the vertical through groove 1081; A spring expansion plate 112 is fixedly connected to one end of the horizontal plate 11 away from the extrusion wheel 1083 , and the end of the spring expansion plate 112 is an inclined surface.

[0027] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 As shown, a receiving groove 113 is vertically opened in the middle of the side of the vertical through groove 1081 away from the C-shaped slide 1082. The receiving groove 113 and the vertical plate of the "I"-shaped plate 1086 are on the same vertical plane. Two rectangular vertical grooves 114 are opened in the vertical through groove 1081. The two rectangular vertical grooves 114 are respectively on both sides of the receiving groove 113. The two rectangular vertical grooves 114 correspond one-to-one to the two horizontal plates 11 inside the vertical through groove 1081.

[0028] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9As shown, a notched rectangular rod 115 runs through the center of the extrusion rod 108. One end of the notched rectangular rod 115 extends into the receiving groove 113 and is rotatably connected to two rollers 116. The other end of the notched rectangular rod 115 is fixedly connected to a wedge block 117. A return spring 118 is fixedly connected between the wedge block 117 and the extrusion rod 108. The two rollers 116 at the end of the notched rectangular rod 115 abut against the inclined surface of the end of the spring expansion plate 112, reducing the resistance of the notched rectangular rod 115 when pushing the spring expansion plate 112 to retract. The notch at the end of the notched rectangular rod 115 can accommodate the vertical plate of the "I"-shaped plate 1086, ensuring that when the "I"-shaped plate 1086 moves into the notch at the end of the notched rectangular rod 115, the locking tooth plate 1085 on the "I"-shaped plate 1086 separates from the tooth groove 1084, allowing the extrusion wheel 1083 to rotate.

[0029] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 As shown, the inner plate of the spring telescopic plate 112 is vertically rotatably connected with a rotating rod 12, and the rotating rod 12 reduces the resistance between the inner plate of the spring telescopic plate 112 and the vertical plate of the "I"-shaped plate 1086 when the inner plate moves.

[0030] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 As shown, four abutment seats 6 are fixedly connected to the top surface of the fixed base 1 , and the four abutment seats 6 correspond one-to-one to the four wedge blocks 117 and are located below them.

[0031] The use method and advantages of the present invention: When the piston assembly equipment of the mud pump is in operation and use, the working process is as follows: like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 Figure 1 Figure 2 Figure 3 Figure 4 Figures 5 to 9 As shown: S1: Place and fix components First, the piston cylinder is fixed with the aid of the clamp 2 , and then the piston to be assembled is inserted into the interior of the barrel-shaped outer shell 10 from the lower end of the barrel-shaped outer shell 10 by a conventional robotic arm.

[0032] S2: Clamp the piston and position it by suction

[0033] The bidirectional motor 104 is started, which drives the worm 103 to rotate clockwise, and in turn drives the hollow worm gear 102 to rotate the hollow disc 101 clockwise. At this time, the guide inclined groove 106 will extrude the guide rod 107, so that the four extrusion rods 108 move simultaneously to the inside of the barrel-shaped shell 10, and the extrusion wheels 1083 at the ends of the extrusion rods 108 will clamp the side of the piston in the barrel-shaped shell 10.

[0034] With the movement of the extrusion rod 108, the C-shaped slide plate 1082 moves in the vertical through groove 1081, and the first spring telescopic rod 1087 pushes the "H" shaped plate 1086 to move in the vertical through groove 1081, and the vertical plate of the "H" shaped plate 1086 extrudes the spring telescopic plate 112, and drives the horizontal plate 11 to move in the same direction. When one end of the horizontal plate 11 abuts against the inner wall of the rectangular vertical groove 114, the C-shaped slide plate 1082 continues to extrude the first spring telescopic rod 1087, and the locking tooth plate 1085 on the "H" shaped plate 1086 is passively clamped on the tooth groove 1084, locking the shaft of the extrusion wheel 1083, thereby ensuring the stability of the clamping of the extrusion wheel 1083 on the side of the piston. Then, the top of the piston abuts against the suction disc 8, and the suction disc 8 is controlled by the vacuum pump 9 to adsorb the top of the piston.

[0035] S3: conveying and assembling the piston

[0036] The air cylinder 4 is elongated, driving the spline telescopic rod 5 to move downward, and the spline telescopic rod 5 moves downward in cooperation with the spring damping telescopic rod 52, driving the barrel-shaped shell 10 below the cross-shaped fixing frame 51 to move downward synchronously, and the piston is conveyed coaxially into the piston cylinder.

[0037] When the piston enters the piston cylinder for a distance, the wedge-shaped block 117 abuts against the abutting seat 6, the wedge-shaped block 117 extrudes the inclined surface at the end of the spring telescopic plate 112, causing the spring telescopic plate 112 to contract, and under the action of the reset force of the second spring telescopic rod 111, the spring telescopic plate 112 moves between the C-shaped slide plate 1082 and the "H" shaped plate 1086. At this time, the abutting force of the "H" shaped plate 1086 on the spring telescopic plate 112 disappears, the "H" shaped plate 1086 moves into the gap at the end of the gap rectangular rod 115, and the locking tooth plate 1085 on the "H" shaped plate 1086 is separated from the tooth groove 1084, thereby releasing the locking of the extrusion wheel 1083 by the locking tooth plate 1085.

[0038] After the extrusion rod 108 abuts against the abutting seat 6, the air cylinder 4 continues to elongate, driving the piston on the suction disc 8 to move downward, and at this time the spring damping telescopic rod 52 is first deflected and compressed and then elongated, driving the extrusion wheel 1083 to roll on the side of the piston, ensuring that the piston is stably inserted into the piston cylinder, and completing the assembly of the piston and the piston cylinder. Subsequently, the suction disc 8 is controlled by the vacuum pump 9 to release the adsorption of the top of the piston.

[0039] S4: device reset

[0040] The cylinder 4 moves up, the bidirectional motor 104 drives the worm 103 to rotate counterclockwise, which promotes the extrusion rod 108 to spread outwards. At this time, the reset spring telescopic rod 1088 drives the C-shaped slide plate 1082 to reset, and the first spring telescopic rod 1087 pulls the "H" shaped plate 1086 to reset. The slope at the end of the extrusion spring telescopic plate 112 makes it compress and reset, so that the spring telescopic plate 112 is again located on the side of the "H" shaped plate 1086 away from the C-shaped slide plate 1082, completing the reset of the device.

[0041] Moreover, when the cylinder 4 pulls the cross fixed frame 51 on the spline telescopic rod 5 to resist the inverted L-shaped support 3, the spline telescopic rod 5 pulls the spring damping telescopic rod 52 to deflect and compress and then reset.

[0042] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A piston assembly device for manufacturing a mud pump, comprising a fixed base (1), a fixture (2) for fixing a piston cylinder being mounted at the center of the top surface of the fixed base (1), and an inverted L-shaped bracket (3) being connected to the fixed base (1); A cylinder (4) is installed at the front end of the top of the inverted L-shaped bracket (3), and the lower end of the cylinder (4) is connected to a spline telescopic rod (5). A lower pressure seat (7) is fixed on the outer sleeve of the spline telescopic rod (5), and the lower pressure seat (7) is provided with a suction cup (8) with at least four adsorption pistons. A vacuum pump (9) for controlling the suction and discharge of the suction cup is installed on the top surface of the lower pressure seat (7); Its characteristics are: A cross fixing frame (51) is sleeved on the inner rod of the spline telescopic rod (5), and two groups of spring damping telescopic rods (52) are hingedly connected to the bottom surface of the cross fixing frame (51), and the other end of the spring damping telescopic rod (52) is hingedly connected to the outer sleeve of the spline telescopic rod (5); The four ends of the cross fixing frame (51) are connected to the barrel-shaped housing (10), the barrel-shaped housing (10) is located above the fixture (2) and is coaxial to ensure assembly accuracy, the inner wall of the barrel-shaped housing (10) is connected to the hollow disk (101), the top surface of the hollow disk (101) is connected to the coaxial hollow worm gear (102), the hollow worm gear (102) is engaged with the worm (103), and one end of the worm is equipped with a bidirectional motor (104) that drives the worm to rotate forward and reverse, and the bidirectional motor (104) is arranged on the barrel-shaped housing (10); The bottom of the hollow disk (101) is provided with four guide inclined grooves (106) for driving the guide rods (107) to slide. The guide inclined grooves (106) are slidably connected to the guide rods (107). The lower ends of the guide rods (107) are provided with extrusion rods (108) for clamping the piston, which slide and penetrate the side wall of the barrel-shaped shell (10).

2. A piston assembly device for manufacturing a mud pump according to claim 1, characterized in that: The extrusion rod (108) has a vertical through slot (1081) formed toward the center end, a C-shaped slide plate (1082) is slidably connected in the vertical through slot (1081), and a reset spring telescopic rod (1088) for driving reset is connected between the vertical plate of the C-shaped slide plate (1082) and the vertical through slot (1081); Both ends of the C-shaped slide (1082) are rotatably connected to an extrusion wheel (1083) with a rolling clamping piston, and both ends of the shaft of the extrusion wheel (1083) are provided with annular tooth grooves (1084); A locking tooth plate (1085) for locking the extrusion wheel is provided on the front and rear sides of the two horizontal plates of the C-shaped slide plate (1082), and the locking tooth plate (1085) has teeth on the side facing the extrusion wheel (1083) for locking with the annular tooth groove (1084); A side of the locking tooth plate (1085) facing away from the extrusion wheel (1083) is connected to an "I"-shaped plate (1086); the "I"-shaped plate (1086) is slidably arranged on the inner side of the C-shaped slide plate (1082); a first spring telescopic rod (1087) is provided between the "I"-shaped plate (1086) and the C-shaped slide plate (1082) for pushing the "I"-shaped plate (1086) to move.

3. A piston assembly device for manufacturing a mud pump according to claim 2, characterized in that: Two horizontal plates (11) are mounted on the vertical plate of the C-shaped slide (1082), and the horizontal plates (11) are connected to a second spring telescopic rod (111) for providing a reset force, and the other end of the second spring telescopic rod (111) is fixed to the inner wall of the vertical through slot (1081); One end of the horizontal plate (11) away from the extrusion wheel (1083) is connected to a retractable spring retractable plate (112), and the end of the spring retractable plate (112) is a slope for facilitating contraction.

4. A piston assembly device for manufacturing a mud pump according to claim 3, characterized in that: A receiving groove (113) for receiving the vertical plate of the "I"-shaped plate (1086) is formed in the middle of the vertical through groove (1081) away from the C-shaped slide plate (1082); Two rectangular vertical grooves (114) are opened in the vertical through groove (1081). The two rectangular vertical grooves (114) are located on both sides of the accommodating groove (113). The rectangular vertical grooves (114) correspond to the horizontal plate (11) one by one to limit the stroke.

5. A piston assembly device for manufacturing a mud pump according to claim 4, characterized in that: The center of the extrusion rod (108) passes through the notched rectangular rod (115), one end of the notched rectangular rod (115) extends into the accommodating groove (113) and is rotatably connected to two rollers (116), the other end of the notched rectangular rod (115) is connected to a wedge block (117) for triggering unlocking, and a reset spring (118) for driving reset is connected between the wedge block (117) and the extrusion rod (108).

6. A piston assembly device for manufacturing a mud pump according to claim 5, characterized in that: The inner plate of the spring telescopic plate (112) is vertically rotated to connect the rotating rod (12) for reducing resistance.

7. A piston assembly device for manufacturing a mud pump according to claim 6, characterized in that: The top surface of the fixed base (1) is connected to four contact seats (6) that cooperate with the wedge block (117) to unlock. The contact seats (6) correspond to the wedge block (117) one by one and are located below it.

8. A piston assembly device for manufacturing a mud pump according to claim 1, characterized in that: Each group of spring damping telescopic rods (52) is three, which enhances the buffer reset stability.

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