Linkage structure of pedal water pump

Abstract

The utility model provides a linkage structure of a pedal water pump, and belongs to the technical field of water pumps. The linkage structure solves the technical problem that a linkage structure of an existing pedal water pump is insufficient in maintenance convenience. The pedal water pump comprises a base and two cylinder bodies arranged on the base, openings of the two cylinder bodies face upwards, pistons capable of moving up and down are arranged in the cylinder bodies, piston rods of the pistons face upwards and extend out of the cylinder bodies, a frame body is further fixed to the base, the linkage structure comprises a flexible pull rope and a rocker arm rotationally connected to the frame body, and the rocker arm is located between the two piston rods. The lower ends of the pull ropes are connected with the piston rods, the upper side faces of the two ends of the rocker arm are provided with positioning grooves formed by downward sinking, the inner walls of the positioning grooves are further provided with notches extending to the edges of the upper side faces of the rocker arm, and the upper ends of the pull ropes are located in the notches and fixedly connected with upper check blocks. The upper check block is located in the positioning groove and abuts against the bottom face of the positioning groove in a limiting mode. The pedal water pump is more convenient to assemble and maintain.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water pump technical field relates to a linkage structure of foot pump. BACKGROUND

[0002] The lack of electric water pumps and fuel water pumps in the vast rural areas at home and abroad leads to the problem that crops and plants cannot be irrigated in time and die of drought. The foot-operated water pump does not require electricity and is labor-saving, which is the most ideal agricultural irrigation and flushing tool for the vast farmland, vegetable field, garden, orchard, animal breeding villa flower cultivation, urban plant greening, private car washing, bottom plate flushing and road.

[0003] A foot-operated water pump is disclosed in the patent with the authorized announcement number CN202250661U, a water inlet chamber connected with a water inlet joint and a water outlet chamber connected with a water outlet joint are arranged on the pump body, two cylinder bodies are symmetrically arranged on the upper surface of the pump body, a water suction valve communicating with the water inlet chamber and a water discharge valve communicating with the water outlet chamber are arranged in each cylinder body, a piston and a piston rod are arranged in the cylinder body, a bracket is longitudinally arranged between the two cylinder bodies, a rocker arm mechanism and a foot-operated device are arranged on the bracket, the piston rods in the cylinder bodies are respectively connected with the two ends of the rocker arms of the rocker arm mechanism through connecting devices, and the upper parts of the two piston rods are connected with the foot-operated connecting rods of the foot-operated device, and the alternate swinging of the two foot-operated connecting rods can drive the two piston rods to alternately move back and forth.

[0004] The foot-operated water pump can realize alternate pumping through the linkage of the rocker arms, but still has some deficiencies: the steel cable is fixed at the top end of the arc-shaped surface of the two ends of the rocker arm, and the fixing means is usually riveting, welding or other means, and the steel cable part has high wear during use, so it needs to be replaced and maintained. The connecting structure requires more time for fixing and reinforcing during disassembly and installation each time, and the maintenance is not convenient. SUMMARY

[0005] The utility model provides a linkage structure of foot pump in view of the above -mentioned problem that the prior art exists, the technical problem that the utility model wants to solve is: how to improve the maintenance convenience of linkage structure.

[0006] The purpose of the utility model can be realized by the following technical schemes:

[0007] The linkage structure of a pedal water pump, the pedal water pump comprising a base and two open upward cylinder bodies arranged on the base, each of the cylinder bodies is provided with a piston capable of moving up and down, the piston rod of the piston is upward and extends out of the cylinder body, the base is further fixed with a frame body, the linkage structure comprises a flexible pull rope and a rocker arm rotatably connected to the frame body, the rocker arm is located between the two piston rods, and the two ends of the rocker arm are respectively directed to the two piston rods, the lower end of the pull rope is connected to the piston rod, characterized in that the upper side of each end of the rocker arm is provided with a positioning groove formed by being concave downward, the inner wall of the positioning groove is further provided with a notch extending to the edge of the upper side of the rocker arm, the upper end of the pull rope is located in the notch, and an upper stopper is fixed to the upper end of the pull rope, the upper stopper is located in the positioning groove and abuts against the bottom surface of the positioning groove.

[0008] By arranging the positioning groove on the upper side of each end of the rocker arm and arranging the notch on the inner wall of the positioning groove, the upper end of the pull rope is located in the notch, and the upper stopper connected to the upper end of the pull rope abuts against the positioning groove, so that the upper stopper can be stably kept in the positioning groove downward under the action of the pulling force and gravity of the pull rope in use, and the pull rope cannot easily come out, so that the pulling transmission process of the pull rope is stable, when the pull rope assembly needs to be maintained, the user can pull the upper stopper with one hand and press the end of the rocker arm with the other hand, and then transversely exerts force to drive the pull rope to come out of the notch, so that the upper end of the pull rope can be removed, and when a new pull rope is installed, the upper end of the pull rope only needs to be transversely embedded in the notch and the upper stopper falls into the positioning groove, so that the installation is completed, and the assembly and maintenance are more convenient.

[0009] In the linkage structure of the pedal water pump, the notch is open to the side where the piston rod is located, and the two ends of the rocker arm are provided with strip-shaped support plates arranged upward and downward, and the upper edge of the support plate is fixed to the edge of the bottom of the notch. In this way, the flexible pull rope can be supported by the support plate when being taut, and the pull rope can avoid a large deflection angle to the edge of the bottom of the notch during the pulling process, so that the edge of the bottom of the notch can not scratch the pull rope, and the service life of the pull rope is ensured.

[0010] In the linkage structure of the pedal water pump, the middle part of the support plate is outwardly arched in an arc shape. In this way, the part of the support plate in contact with the pull rope is an arc surface, so that the pull rope being taut can be prevented from being cut by the edge of the support plate, and the service life of the pull rope is ensured.

[0011] In the linkage structure of the pedal water pump, the outer side of the support plate is provided with an inner groove arranged upward and downward in a strip shape, and the pull rope is located in the inner groove. In this way, the pull rope being taut can be kept in the inner groove, so that the pull rope can be prevented from being randomly deflected and moving, and the transmission efficiency is improved.

[0012] In the linkage structure of the foot water pump, the inner side of the piston rod is provided with a vertical partition plate, the partition plate is provided with a strip-shaped sliding groove in up-down direction, the lower end of the sliding groove is in open state, the lower end of the pull rope penetrates through the sliding groove and is fixedly connected with a lower stopper on the other side of the partition plate, and the lower stopper abuts against the piston rod upwardly. Thus, after the upper stopper at the upper end of the pull rope is disassembled, the pull rope can be pulled downward to be pulled out from the lower end of the sliding groove, and then the whole pull rope is disassembled, so that the maintenance is convenient.

[0013] In the linkage structure of the foot water pump, the lower end of the sliding groove is in flared state. Thus, the installation of the pull rope is guided, so that the installation is convenient.

[0014] Compared with the prior art, the foot water pump linkage structure has the following advantages:

[0015] When the pull rope needs to be maintained, the user can hold the upper stopper with one hand and press the end of the rocker arm with the other hand, and then the pull rope at the upper end can be disassembled by pulling the pull rope out of the opening of the notch. When a new pull rope is installed, the pull rope at the upper end is only needed to be embedded in the notch in transverse direction and the upper stopper is only needed to be fallen into the positioning groove, so that the installation is completed, and the assembly and maintenance are more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective structural schematic view of the embodiment.

[0017] Figure 2 is a top view structural schematic view of the embodiment.

[0018] Figure 3 is Figure 2 A-A sectional view schematic view in the

[0019] Figure 4 is Figure 3 B part enlarged view in

[0020] Figure 5 is a perspective structural schematic view of the rocker arm in the embodiment.

[0021] Figure 6 is a perspective schematic view of the cooperation of the rocker arm, the pull rope and the piston rod in the embodiment.

[0022] Figure 7 is a perspective structural schematic view of the piston rod in the embodiment.

[0023] In the drawing, 1 is a base, 2 is a cylinder body,

[0024] 3 is a piston, 31 is a piston rod, 311 is a partition plate, and 312 is a sliding groove.

[0025] 4 is a frame body.

[0026] 5 is a pull rope, 51 is an upper stopper, and 52 is a lower stopper.

[0027] 6. Rocker arm; 61. Positioning groove; 62. Notch; 63. Support plate; 631. Inner groove;

[0028] 7. Foot pedal linkage. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] like Figures 1-7 As shown, this foot-operated water pump includes a base 1, two upward-facing cylinders 2 mounted on the base 1, and two rod-shaped foot pedal connecting rods 7. The structure of the base 1 can refer to the prior art in the background section. Each cylinder 2 is equipped with a piston 3 that can move up and down. The piston rod 31 of the piston 3 faces upward and extends out of the cylinder 2. A frame 4 is also fixed on the base 1. One end of the foot pedal connecting rod 7 is hinged to the frame 4. The linkage structure includes a flexible pull rope 5 and a rocker arm 6 rotatably connected to the frame 4. The rocker arm 6 is located between the two piston rods 31, and the rocker arm 6... The two ends of the rocker arm 6 face the two piston rods 31 respectively. The lower end of the pull rope 5 is connected to the piston rod 31. The upper side of both ends of the rocker arm 6 has a downwardly recessed positioning groove 61. The inner wall of the positioning groove 61 also has a notch 62 extending to the edge of the upper side of the rocker arm 6. The upper end of the pull rope 5 is located in the notch 62. The upper end of the pull rope 5 is fixedly connected to an upper stop block 51. The upper stop block 51 is cylindrical and its radial dimension is larger than that of the pull rope 5. The upper stop block 51 is located in the positioning groove 61 and is limited and abuts against the bottom surface of the positioning groove 61. The notch 62 is open on the side where the piston rod 31 is located. The two ends of the rocker arm 6 have strip-shaped support plates 63 arranged vertically. The upper edge of the support plate 63 is fixed to the edge of the bottom of the notch 62. The middle part of the support plate 63 is arched outward in an arc shape. The outer side of the support plate 63 has a strip-shaped inner groove 631 arranged vertically. The pull rope 5 is partially located in the inner groove 631. The piston rod 31 has a vertically arranged partition 311 on its inner side. The partition 311 has a strip-shaped sliding groove 312 arranged vertically. The lower end of the sliding groove 312 is open and flared. The lower end of the pull rope 5 passes through the sliding groove 312 and is fixedly connected to the lower stop block 52 located on the other side of the partition 311. The lower stop block 52 is cylindrical and its radial dimension is larger than the width dimension of the upper end of the sliding groove 312. The lower stop block 52 faces upward and abuts against the piston rod 31.

[0031] When the pull rope 5 needs to be maintained and replaced, the operator can hold the upper block 51 with one hand and press the end of the rocker arm 6 with the other hand, so that the upper block 51 is disengaged from the positioning groove 61, and then transversely drives the pull rope 5 to move towards the opening side of the gap 62, so that the upper end of the pull rope 5 together with the upper block 51 is disassembled from the rocker arm 6. When a new pull rope 5 is installed, it is only necessary to transversely embed the upper end of the pull rope 5 into the gap 62 and make the upper block 51 fall into the positioning groove 61 to complete the installation.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A linkage structure for a foot-operated water pump, the foot-operated water pump comprising a base (1) and two upward-facing cylinders (2) disposed on the base (1), each cylinder (2) being provided with a piston (3) capable of vertical movement, the piston rod (31) of the piston (3) extending upward and out of the cylinder (2), a frame (4) fixed on the base (1), the linkage structure comprising a flexible pull rope (5) and a rocker arm (6) rotatably connected to the frame (4), the rocker arm (6) being located between the two piston rods (31), and both ends of the rocker arm (6) facing the two piston rods (31) respectively, the lower end of the pull rope (5) being connected to the piston rods (31), characterized in that, The upper sides of both ends of the rocker arm (6) have downward recessed positioning grooves (61). The inner wall of the positioning groove (61) also has a notch (62) extending to the edge of the upper side of the rocker arm (6). The upper end of the pull rope (5) is located in the notch (62). The upper end of the pull rope (5) is fixedly connected to an upper stop block (51). The upper stop block (51) is located in the positioning groove (61) and is limited and abuts against the bottom surface of the positioning groove (61).

2. The linkage structure of the foot-operated water pump according to claim 1, characterized in that, The notch (62) is open on the side where the piston rod (31) is located. The rocker arm (6) has strip-shaped support plates (63) arranged vertically at both ends. The upper edge of the support plate (63) is fixed to the bottom edge of the notch (62).

3. The linkage structure of the foot-operated water pump according to claim 2, characterized in that, The support plate (63) arches outward in the middle in an arc shape.

4. The linkage structure of the foot-operated water pump according to claim 2, characterized in that, The outer side of the support plate (63) has a strip-shaped inner groove (631) arranged vertically, and the pull rope (5) is located in the inner groove (631).

5. The linkage structure of the foot-operated water pump according to claim 1, 2, 3, or 4, characterized in that, The piston rod (31) has a vertically arranged partition (311) on its inner side. The partition (311) has a vertically arranged strip-shaped groove (312). The lower end of the groove (312) is open. The lower end of the pull rope (5) passes through the groove (312) and is fixedly connected to the lower stop block (52) located on the other side of the partition (311). The lower stop block (52) faces upward and abuts against the piston rod (31).

6. The linkage structure of the foot-operated water pump according to claim 5, characterized in that, The lower end of the groove (312) is flared.

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