CN112295771A

CN112295771A - Knapsack sprayer

Info

Publication number: CN112295771A
Application number: CN202010513952.9A
Authority: CN
Inventors: 林卫
Original assignee: Taizhou Shengshi Yuanlin Dynamo Electric Technology Co ltd
Current assignee: Taizhou Shengshi Yuanlin Mechanical and Electrical Technology Co.,Ltd.
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-02-02
Anticipated expiration: 2040-06-08
Also published as: CN112295771B

Abstract

The invention relates to a knapsack sprayer which comprises an upper box body and a lower box body, wherein a motor and a pump body are arranged in the lower box body, the motor is provided with an output shaft, the pump body is provided with an input shaft, a water inlet and a water outlet, the water inlet is communicated with the upper box body, the water outlet is communicated with a water outlet pipe, the output shaft and the input shaft are coaxially arranged, a distance is reserved between the end part of the output shaft and the end part of the input shaft, a butting disc is coaxially and slidably sleeved on the periphery of the input shaft, the butting disc and the input shaft are circumferentially fixed, a driving piece is further arranged in the lower box body and used for driving the butting disc to axially move, and the end surface of the butting. When closing the spray gun, the output shaft is kept away from to the butt dish, cuts off the power transmission between the motor and the pump body, and the pump body stall avoids the interior liquid medicine pressure of outlet pipe to last rising, and then avoids the liquid medicine water clock.

Description

Knapsack sprayer

Technical Field

The invention relates to the technical field of sprayers, in particular to a knapsack sprayer.

Background

The sprayer is an agricultural and forestry machine commonly used in agriculture and forestry, and is used for pumping and outputting liquid medicine with certain pressure by using a water pump, and then the liquid medicine with certain pressure is changed into mist by a spray gun and then is uniformly sprayed onto crops to prevent diseases and insect pests.

The CN205308635U Chinese patent that current publication number is does, it discloses a backpack electric nebulizer, including the box, one side of box is equipped with the braces, and the box includes box and the lower box that is used for the stock solution and has the inlet, goes up and has set firmly two water pumps in the box, for the battery of two water pump power supplies and the controller of control water pump work, is connected with on the water inlet of every water pump to stretch into the pipette in the lower box, is connected with the spraying pole through the fluid-discharge tube on the delivery port of water pump.

The Chinese patent with the prior publication number of CN208317739U discloses a novel spray gun, which comprises a spray gun body and a pinch plate, wherein a liquid inlet pipeline, a liquid outlet pipeline and a valve are arranged in the spray gun body.

During operation, the water pump operates, and the delivery port of water pump and the interior liquid medicine that is full of and has certain pressure of flowing back are connected to the inlet fluid pipeline of spraying rifle, and personnel detain the buckle of moving spraying rifle in order to push away the valve, and the liquid medicine that has certain pressure spouts to the crops surface after spraying rifle atomizing.

The above prior art solutions have the following drawbacks: when spraying liquid medicine to sapling, fruit tree, personnel need move to the week side of another sapling from week side of a sapling, and the removal in-process can close the spraying rifle usually, and at this moment, the water pump lasts work, constantly fills into liquid medicine in the drain pipe, and liquid medicine pressure in the drain pipe lasts to rise, and high-pressure liquid medicine can push open the valve of spraying rifle by force, and then leads to the liquid medicine drippage to ground, causes the waste.

Disclosure of Invention

In view of the disadvantages of the prior art, it is an object of the present invention to provide a backpack sprayer, which can prevent the liquid medicine from continuously rising in the water outlet pipe and further prevent the liquid medicine from leaking when the spray gun is turned off and the pump body stops operating by cutting off the power transmission between the motor and the pump body.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a knapsack sprayer, includes box and lower box, be equipped with motor and pump body in the lower box, the motor has the output shaft, the pump body has input shaft, water inlet and delivery port, the box is gone up in the water inlet intercommunication, the delivery port intercommunication has the outlet pipe, output shaft and the coaxial setting of input shaft, just there is the interval between the tip of output shaft and the tip of input shaft, the coaxial slip of periphery of input shaft has cup jointed the butt dish, circumference is fixed between butt dish and the input shaft, still be equipped with the driving piece in the lower box, the driving piece is used for driving butt dish along axial displacement, the terminal surface of butt dish is used for supporting tight output shaft and constitutes the friction pair.

By adopting the technical scheme, when the pump works normally, the driving part enables the end face of the abutting disc to abut against the output shaft, the torque output by the motor is transmitted to the pump body by means of the friction force between the abutting disc and the output shaft, and the pump body operates to output the liquid medicine with pressure; when the spray gun is closed, the driving piece enables the abutting disc to be far away from the output shaft, a space exists between the abutting disc and the output shaft, power transmission between the motor and the pump body is cut off, the pump body stops running, the pressure of liquid medicine in the water outlet pipe is prevented from continuously rising, and liquid medicine is prevented from dripping;

meanwhile, in the whole process of spraying the liquid medicine, the motor keeps running, the frequent starting and stopping of the motor are avoided, and the service life of the motor is favorably ensured.

The present invention in a preferred example may be further configured to: the driving piece comprises a hydraulic cylinder and a water service pipe, the two ends of the water service pipe are respectively communicated with the water outlet pipe and the hydraulic cylinder, the hydraulic cylinder is provided with a piston rod, the piston rod stretches along the direction of the parallel input shaft, the hydraulic cylinder is located on one side, away from the pump body, of the butt disc, and the end face of the piston rod slides to abut against the end face of the butt disc.

By adopting the technical scheme, when the spray gun is closed, the motor continues to drive the pump body to operate, the pressure of the liquid medicine in the water outlet pipe and the water through pipe is increased, the piston rod of the hydraulic cylinder is extended out, the abutting disc is automatically far away from the output shaft, the pump body stops operating, the pressure of the liquid medicine in the water outlet pipe and the water through pipe is stopped increasing, and the liquid medicine is prevented from dripping and leaking;

when the spray gun is opened again, the pressure of the liquid medicine in the water outlet pipe and the water through pipe is reduced, the abutting disc pushes the piston rod of the hydraulic cylinder to retract, the abutting disc tightly abuts against the output shaft again, and the torque output by the motor is transmitted to the pump body.

The present invention in a preferred example may be further configured to: the output shaft is coaxially provided with a driving disc, and the end face of the abutting disc is used for abutting against the driving disc to form a friction pair.

Through adopting above-mentioned technical scheme, the driving-disc is supported tightly to the butt dish, and increase area of contact is favorable to realizing the transmission big torque to the operation of drive pump body.

The present invention in a preferred example may be further configured to: the piston rod is provided with a brake sheet, the brake sheet is used for abutting against the end face of the driving disc, which deviates from the pump body, and forming a friction pair, and the distance between the brake sheet and the abutting disc is larger than the thickness of the driving disc.

By adopting the technical scheme, when the spray gun is closed, the piston rod of the hydraulic cylinder extends out, so that after the abutting disc is separated from the driving disc, the load of the motor is suddenly reduced, the rotating speed of the motor is increased, the rotating speed of the motor is higher than that in normal work, and at the moment, the braking sheet on the piston rod abuts against the driving disc tightly to limit/reduce the rotating speed of the motor, so that the high-speed rotation of the motor is avoided, and the service life of the motor is favorably ensured;

meanwhile, when the spray gun is opened again, the abutting disc tightly abuts against the driving disc, relative rotation exists between the abutting disc and the driving disc, the rotating speed of the abutting disc and the rotating speed of the driving disc are gradually synchronous, the braking piece limits/reduces the rotating speed of the motor, the time required by rotating speed synchronization is favorably shortened, namely, the time of relative rotation between the abutting disc and the driving disc is shortened, the friction and abrasion between the abutting disc and the driving disc are reduced, and the service life of the driving disc and the abutting disc is favorably ensured.

The present invention in a preferred example may be further configured to: the brake sheet is provided with an elastic piece which is used for sliding and abutting against the driving disc.

By adopting the technical scheme, when the brake sheet extrudes the driving disc, the elastic part elastically deforms and is filled into a gap between the brake sheet and the driving disc to compensate the unevenness (slight recess or protrusion) of the end surfaces of the brake sheet and the driving disc so as to ensure the blocking effect of the brake sheet on the rotation of the driving disc; meanwhile, the impact of the buffering brake sheet on the driving disc is realized by utilizing the elastic deformation of the elastic piece.

The present invention in a preferred example may be further configured to: the hydraulic cylinders are two and are respectively positioned on two sides of the axis of the abutting disc.

Through adopting above-mentioned technical scheme, the pneumatic cylinder that the symmetry set up avoids butt dish unilateral atress, is favorable to the steady removal of butt dish.

The present invention in a preferred example may be further configured to: and a resisting spring and a baffle plate are arranged in the lower box body and on one side of the resisting disc facing the pump body, the resisting spring stretches along the direction parallel to the input shaft, two ends of the resisting spring are respectively resisting against the resisting disc and the baffle plate, and the resisting spring enables the resisting disc to have a tendency close to the motor.

By adopting the technical scheme, when the clutch works normally, the abutting spring enables the end face of the abutting disc to abut against the output shaft;

when the spray gun is closed, the piston rod of the hydraulic cylinder extends out, so that the abutting disc overcomes the elastic force of the abutting spring to move, the abutting disc is far away from the output shaft, and the power transmission between the motor and the pump body is cut off;

when the spray gun is opened again, the pressure of the liquid medicine in the water outlet pipe and the water through pipe is reduced, the supporting force of the piston rod of the hydraulic cylinder to the abutting disc is reduced, the abutting spring recovers the original state, the end face of the abutting disc abuts against the output shaft, and the piston rod of the hydraulic cylinder is pushed to retract.

The present invention in a preferred example may be further configured to: the abutting spring is sleeved on the periphery of the input shaft, and the baffle is fixedly connected with the input shaft.

Through adopting above-mentioned technical scheme, baffle and support tight spring and rotate along with the input shaft synchronization for support the tight spring and keep stable to the extrusion force of butt flange, realize the stable reseing of butt flange.

In summary, the invention includes at least one of the following beneficial technical effects:

1. when the spray gun is closed, the driving piece enables the abutting disc to be far away from the output shaft, power transmission between the motor and the pump body is cut off, the pump body stops running, the pressure of liquid medicine in the water outlet pipe is prevented from continuously rising, and liquid medicine is prevented from dripping;

2. in the whole process of spraying the liquid medicine, the motor keeps running, so that the frequent starting and stopping of the motor are avoided, and the service life of the motor is favorably ensured;

3. when the spray gun is closed, the load of the motor is suddenly reduced, and the brake sheet on the piston rod is tightly pressed against the driving disc so as to limit/reduce the rotating speed of the motor, avoid the high-speed rotation of the motor and be beneficial to ensuring the service life of the motor;

4. the brake sheet limits/reduces the rotating speed of the motor, is beneficial to shortening the time required by rotating speed synchronization between the butting disc and the driving disc, reduces the friction and abrasion between the butting disc and the driving disc, and is beneficial to ensuring the service life of the driving disc and the butting disc.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic view of the internal structure of the lower case.

Fig. 3 is a schematic view of the structure of the motor.

Fig. 4 is a schematic structural view of the pump body.

Fig. 5 is a sectional view of a connection structure between the pump body and the motor.

Fig. 6 is a partially enlarged schematic view of a portion a in fig. 5.

In the figure, 1, an upper box body; 11. an opening; 12. a through hole; 2. a lower box body; 21. avoiding holes; 3. a motor; 31. an output shaft; 4. a pump body; 41. a water inlet; 42. a water outlet; 43. an input shaft; 5. a water outlet pipe; 61. a drive disc; 62. a butting tray; 63. a baffle plate; 64. the spring is tightly propped; 65. a hydraulic cylinder; 651. a water pipe; 652. a piston rod; 66. a support bar; 71. a brake sheet; 711. an ear plate; 72. an elastic member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the backpack sprayer disclosed by the invention comprises an upper tank body 1 and a lower tank body 2, wherein the upper tank body 1 is used for storing liquid medicine, an opening 11 is formed in the upper end of the upper tank body 1, the opening 11 is used for adding the liquid medicine, a motor 3 and a pump body 4 are arranged in the lower tank body 2, and the motor 3 is used for driving the pump body 4 to operate.

Referring to fig. 2, the lower end of the upper box 1 is provided with a through hole 12, and the through hole 12 is communicated with the pump body 4; the pump body 4 has a water inlet 41 and a water outlet 42, the water inlet 41 communicates to the through hole 12 through a hose, the water outlet 42 is communicated with a water outlet pipe 5, the side wall of the lower box body 2 is provided with an avoidance hole 21 through which the water outlet pipe 5 penetrates, the water outlet pipe 5 penetrates the avoidance hole 21 to extend out of the lower box body 2, and the water outlet pipe 5 is used for being connected to a spray gun.

When the spraying machine works, the motor 3 drives the pump body 4 to operate, the pump body 4 sucks the liquid medicine in the upper box body 1, the liquid medicine is output from the water outlet 42 after being pressurized, and the pressurized liquid medicine flows into the spraying gun through the water outlet pipe 5 and is sprayed out after being atomized.

Referring to fig. 3, the motor 3 has an output shaft 31, and a driving disk 61 is coaxially provided at an end of the output shaft 31; referring to fig. 4, the pump body 4 has an input shaft 43, the input shaft 43 is coaxially slidably sleeved with a contact disc 62, the input shaft 43 is square, the contact disc 62 and the input shaft 43 are circumferentially fixed, and referring to fig. 5 and 6, a gap exists between an end surface of a drive disc 61 and an end surface of the input shaft 43.

The abutting disc 62 moves along the axial direction of the input shaft 43, the abutting disc 62 is close to and abuts against the end face of the driving disc 61, and the torque output by the motor 3 is transmitted to the pump body 4 by means of the friction force between the abutting disc 62 and the driving disc 61; the abutment disc 62 moves away from and disengages the drive disc 61, cutting off the power transmission between the motor 3 and the pump body 4.

Referring to fig. 4, a baffle 63 is fixedly connected to the input shaft 43, the baffle 63 is located on one side of the abutting disc 62 facing the pump body 4, a abutting spring 64 is further sleeved on the input shaft 43, two ends of the abutting spring 64 respectively abut against the baffle 63 and the abutting disc 62, and the abutting disc 62 tends to be away from the pump body 4.

Referring to fig. 2 and 3, two sides of the axis of the output shaft 31 are respectively provided with a hydraulic cylinder 65, a water pipe 651 is arranged on the hydraulic cylinder 65, the water pipe 651 is communicated with the water outlet pipe 5, the hydraulic cylinder 65 is provided with a piston rod 652, the piston rod 652 extends and retracts in a direction parallel to the output shaft 31, a support rod 66 is arranged on the piston rod 652, and referring to fig. 5 and 6, the diameter of the abutting disc 62 is larger than that of the drive disc 61, so that the end face of the support rod 66 abuts against the end face of the abutting disc.

When the spray gun is closed, the pressure of the liquid medicine in the water outlet pipe 5 and the water through pipe 651 is increased, the piston rod 652 extends out, and the abutting disc 62 is far away from the driving disc 61 through the supporting rod 66; when the spray gun is turned on again, the pressure of the liquid medicine in the water outlet pipe 5 and the water pipe 651 is reduced, and the elastic force of the abutting spring 64 enables the abutting disc 62 to abut against the driving disc 61.

Referring to fig. 3 and 6, the output shaft 31 is further slidably sleeved with a brake sheet 71, the brake sheet 71 is annular, an ear plate 711 is disposed on the outer periphery of the brake sheet 71, the ear plate 711 is connected to the piston rod 652, the outer diameter of the brake sheet 71 is equal to the outer diameter of the abutting disc 62, and the support rod 66 is disposed on the brake sheet 71. The brake sheet 71 is located on one side of the driving disc 61 facing the motor 3, and an end surface of the brake sheet 71 facing the driving disc 61 is provided with an elastic member 72, and the elastic member 72 may be made of rubber.

When the piston rod 652 extends out and the abutting disc 62 is far away from the driving disc 61 through the supporting rod 66, the braking piece 71 and the elastic piece 72 abut against the driving disc 61 to limit/reduce the rotation speed of the motor 3.

The implementation principle of the embodiment is as follows: when the spray gun works, the abutting spring 64 enables the end face of the abutting disc 62 to abut against the driving disc 61, the torque output by the motor 3 is transmitted to the pump body 4 by means of the friction force between the abutting disc 62 and the driving disc 61, and the pump body 4 operates to output liquid medicine with pressure;

when the spray gun is closed, the motor 3 continues to drive the pump body 4 to operate, the pressure of the liquid medicine in the water outlet pipe 5 and the water through pipe 651 rises, so that the piston rod 652 of the hydraulic cylinder 65 extends out, the piston rod 652 drives the brake piece 71 and the support rod 66 to be far away from the motor 3, the support rod 66 enables the abutting disc 62 to be far away from the driving disc 61, the power transmission between the motor 3 and the pump body 4 is cut off, the pump body 4 stops operating, and the pressure of the liquid medicine in the water outlet pipe 5 and the water through pipe 651 stops; the brake sheet 71 and the elastic member 72 tightly abut against the driving disc 61 to limit/reduce the rotation speed of the motor 3;

when the spray gun is restarted, the pressure of the liquid medicine in the water outlet pipe 5 and the water through pipe 651 is reduced, the supporting force of the piston rod 652 and the supporting rod 66 of the hydraulic cylinder 65 on the abutting disc 62 is reduced, the abutting spring 64 is restored to the original state, so that the end face of the abutting disc 62 abuts against the output shaft 31, the piston rod 652 of the hydraulic cylinder 65 is pushed to retract, the friction force between the abutting disc 62 and the driving disc 61 is relied on, the torque output by the motor 3 is transmitted to the pump body 4, and the pump body 4 operates to output the liquid medicine with pressure.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a knapsack sprayer, includes box (1) and lower box (2), be equipped with motor (3) and pump body (4) in lower box (2), motor (3) have output shaft (31), pump body (4) have input shaft (43), water inlet (41) and delivery port (42), box (1) is gone up in water inlet (41) intercommunication, delivery port (42) intercommunication has outlet pipe (5), its characterized in that: the output shaft (31) and the input shaft (43) are coaxially arranged, a distance exists between the end portion of the output shaft (31) and the end portion of the input shaft (43), a butting disc (62) is sleeved on the periphery of the input shaft (43) in a coaxial sliding mode, the butting disc (62) and the input shaft (43) are fixed in the circumferential direction, a driving piece is further arranged in the lower box body (2) and used for driving the butting disc (62) to move in the axial direction, and the end face of the butting disc (62) is used for butting against the output shaft (31) and forming a friction pair.

2. The knapsack sprayer of claim 1, wherein: the driving piece comprises a hydraulic cylinder (65) and a water service pipe (651), two ends of the water service pipe (651) are respectively communicated with a water outlet pipe (5) and the hydraulic cylinder (65), the hydraulic cylinder (65) is provided with a piston rod (652), the piston rod (652) stretches and retracts along the direction of the parallel input shaft (43), the hydraulic cylinder (65) is located on one side, deviating from the pump body (4), of the abutting disc (62), and the end face of the piston rod (652) is in sliding abutting connection with the end face of the abutting disc (62).

3. The knapsack sprayer of claim 2, wherein: the output shaft (31) is coaxially provided with a driving disc (61), and the end surface of the abutting disc (62) is used for abutting against the driving disc (61) and forming a friction pair.

4. A knapsack sprayer as claimed in claim 3 wherein: the brake device is characterized in that a brake sheet (71) is arranged on the piston rod (652), the brake sheet (71) is used for abutting against the end face, deviating from the pump body (4), of the driving disc (61) and forming a friction pair, and the distance between the brake sheet (71) and the abutting disc (62) is larger than the thickness of the driving disc (61).

5. The knapsack sprayer of claim 4, wherein: and an elastic part (72) is arranged on the brake sheet (71), and the elastic part (72) is used for sliding and abutting against the driving disc (61).

6. The knapsack sprayer of claim 2, wherein: the hydraulic cylinders (65) are two, and the two hydraulic cylinders (65) are respectively positioned on two sides of the axis of the abutting disc (62).

7. The knapsack sprayer of claim 2, wherein: one side, facing the pump body (4), of the abutting disc (62) in the lower box body (2) is provided with an abutting spring (64) and a baffle (63), the abutting spring (64) stretches along the direction parallel to the input shaft (43), two ends of the abutting spring (64) abut against the abutting disc (62) and the baffle (63) respectively, and the abutting spring (64) enables the abutting disc (62) to have a tendency of being close to the motor (3).

8. The knapsack sprayer of claim 7, wherein: the abutting spring (64) is sleeved on the periphery of the input shaft (43), and the baffle (63) is fixedly connected with the input shaft (43).