CN210567433U

CN210567433U - Gradually-opened grease gun

Info

Publication number: CN210567433U
Application number: CN201921327934.0U
Authority: CN
Inventors: 任华平; 应远祝
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-19
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses an involute type grease gun, including oil storage barrel, grease gun head and back lid, elastic piston subassembly, plunger, crank, be equipped with the plunger cylinder on the grease gun head, the tip of plunger cylinder is equipped with out the oil passageway, the middle part is equipped with the oil feed passageway, the plunger sets up on the plunger cylinder, the crank articulates on the grease gun head, the both sides correspondence of crank be equipped with the arc sliding tray, correspond on the arc sliding tray and be equipped with the movable pulley, be equipped with the sliding shaft of being connected with the plunger on the movable pulley of both sides; when the crank is opened and closed in a reciprocating way, the sliding wheel moves back and forth on the arc-shaped sliding groove, and the sliding wheel pushes the plunger piston to do linear reciprocating motion in the plunger cylinder through the sliding shaft to extrude oil. After adopting this structure, have simple structure reasonable, reactive loss is little, the operation is laborsaving light, refuel of high quality, long service life's advantage.

Description

Gradually-opened grease gun

Technical Field

The utility model relates to an instrument of refueling of filling lubricating oil for mechanical motion equipment, especially a laborsaving light gradual-open grease gun refuels.

Background

The grease gun is a manual tool for filling lubricating grease, and is mainly used for adding lubricating oil during maintenance in the fields of automobiles, machining equipment, engineering machinery, factory production equipment and the like. The most common connection piece depression bar formula grease gun in the existing market, it includes the oil storage barrel, corresponds the grease gun head and the back lid of fixing at oil storage barrel both ends, sets up the elastic piston subassembly in the oil storage barrel, sets up plunger on the plunger cylinder of grease gun head, connects the crank on the plunger, connects the connection piece between grease gun head and the crank, and this structure has following problem in the use: when the hand crank opens and closes the spinning plunger, the handle generates a downward force because of the constraint of the connecting sheet, the force directly acts on the plunger and is converted into the unilateral friction force of the plunger and the plunger cylinder, so the problems of difficult oil injection, easy abrasion and oil leakage of the plunger cylinder, short service life and the like exist, and the hand crank needs further improvement. Therefore, many manufacturers and acquaintances develop and develop the products, but no ideal products are available.

Disclosure of Invention

In order to overcome the defects existing in the prior art, the utility model aims to provide a gradually-opened grease gun which has simple and reasonable structure, small reactive loss, labor-saving and light operation, good oiling quality, long service life and low production cost.

The utility model provides a technical scheme that above-mentioned technical problem adopted, it includes the oil storage barrel, correspond the grease gun head and the back lid fixed at oil storage barrel both ends, set up elastic piston subassembly, plunger, the crank in the oil storage barrel, be equipped with the plunger cylinder on the grease gun head, the tip of plunger cylinder is equipped with out the oil passageway, the middle part is equipped with the oil feed passageway that communicates with the oil storage barrel, the plunger can reciprocating motion ground sets up on the plunger cylinder, the crank passes through the connecting axle and articulates overhead the grease gun, the both sides correspondence of crank be equipped with the arc sliding tray, correspond on the arc sliding tray and be equipped with the movable pulley, be equipped with the sliding shaft of being connected with the plunger on the movable pulley of both sides; the sliding wheel moves back and forth on the arc-shaped sliding groove through the reciprocating opening and closing motion of the crank handle, and the sliding wheel pushes the plunger piston to do linear reciprocating motion in the plunger cylinder through the sliding shaft to extrude oil.

The utility model discloses a further scheme, with the centre point of connecting axle as the centre of a circle of base circle, with the distance of the centre point of connecting axle to the plunger central line perpendicular crossing point as the base circle radius, with the involute of base circle as the datum line of arc sliding tray circular arc, when the crank is at the open position, the movable pulley is located the tip of the arc sliding tray relative to the connecting axle distal end, and the movable direction that the sliding shaft promoted the plunger and the line contained angle theta between the movable shaft and the arc sliding tray centre of a circle are controlled within 20 degrees; when the hand crank is closed, the sliding wheel is positioned at the end part of the arc-shaped sliding groove corresponding to the near end of the connecting shaft, and the moving direction of the plunger pushed by the sliding shaft and the connecting line included angle theta between the sliding shaft and the circle center of the arc-shaped sliding groove are controlled within 20 degrees.

The utility model discloses a further scheme, the crank when the open position, the distance of connecting axle to line between sliding shaft and the arc sliding tray centre of a circle is resistance arm length L1, when the direction of motion of plunger and the line coincidence between sliding shaft and the arc sliding tray centre of a circle, the distance of connecting axle to line between sliding shaft and the arc sliding tray centre of a circle is resistance arm length L2, the crank is when closing the position, the distance of connecting axle to line between sliding shaft and the arc sliding tray centre of a circle is resistance arm length L3, and L1 > L2 > L3, shift up gradually in the arc sliding tray centre of a circle when promoting the plunger during operation, resistance arm length shortens gradually.

The grease gun head is provided with an oil unloading device, the oil unloading device comprises an oil unloading channel communicated with the oil outlet channel, an oil return channel communicated with the oil storage barrel, and an oil unloading steel ball and an oil unloading screw which are arranged on the grease gun head and control the oil unloading channel to be connected with or disconnected from the oil return channel.

The further proposal of the utility model is that a non-return steel ball, a non-return spring and an oil outlet nozzle are arranged on the oil outlet channel of the grease gun head in sequence.

The further proposal of the utility model is that the grease gun head is provided with an exhaust passage which is provided with an exhaust nozzle.

The utility model discloses a further scheme, the piston rod of elastic piston subassembly stretches out the back lid and is connected with the handle.

After adopting above-mentioned structure, compare with prior art and have following advantage and effect: firstly, design according to the theory of gradually bursting at the seams and the structural feature who combines the grease gun, guarantee that the effort that produces the plunger is the biggest, and the loss is minimum, lets the operator laborsaving light in the use. And no matter the crank handle is in any position during opening and closing, the included angle between the moving direction of the plunger and the connecting line between the sliding shaft and the center of the arc-shaped sliding groove is controlled within 20 degrees, so that the acting force of the crank handle on the plunger is basically consistent with the moving direction of the plunger, the length of the resistance arm is gradually shortened when the plunger is pushed to work, on the basis of ensuring the moving stroke, the reactive loss is minimum, the output pressure is maximum, the unilateral abrasion between the plunger and the plunger cylinder is greatly reduced, the crank handle can be stable and labor-saving at any position during opening and closing, and the problems of labor waste, unsmooth, easy abrasion and short service life of the conventional grease gun are solved. And the oil outlet channel is provided with the oil unloading device communicated with the oil storage cylinder body, so that lubricating oil with over-high pressure in the oil outlet channel after oil injection can be quickly returned to the oil storage cylinder body to realize pressure relief, the connecting nozzle can be easily taken down from the machine equipment, lubricating oil is not wasted, the oil injection is sanitary and clean, and the operation and the use are convenient.

Drawings

Fig. 1 is a schematic view of the matching structure of the crank handle in the folding position.

Fig. 2 is a schematic view of the matching structure of the hand crank of the utility model at the middle position.

Fig. 3 is a schematic view of the fitting structure of the hand crank of the present invention at the most open position.

Fig. 4 is an ideal state schematic diagram of the present invention based on the involute principle.

Fig. 5 is a schematic view of the matching structure of the oil discharge device of the present invention.

The oil-discharging device comprises a hand crank 1, an arc-shaped sliding groove 2, a sliding wheel 3, a sliding shaft 4, a connecting shaft 5, an oil outlet nozzle 6, an exhaust nozzle 7, a check spring 8, a check steel ball 9, an oil outlet channel 10, a plunger 11, a grease gun head 12, an oil inlet channel 13, an oil storage cylinder 14, a rear cover 15, an elastic piston assembly 16, a handle 17, an oil discharging channel 18, an oil discharging steel ball 19, an oil discharging screw 20, an oil returning channel 21 and a plunger cylinder 22.

Detailed Description

Fig. 1 to 3 show the gradual-open grease gun of the present invention, which comprises a grease storage cylinder 14, a grease gun head 12 and a rear cover 15 correspondingly fixed at both ends of the grease storage cylinder 14, an elastic piston assembly 16 arranged in the grease storage cylinder 14, a plunger 11, and a crank handle 1, wherein the grease gun head 12 is provided with a plunger cylinder 22, the end of the plunger cylinder 22 is provided with an oil outlet channel 10, the middle of the plunger cylinder is provided with an oil inlet channel 13 communicated with the grease storage cylinder 14, the plunger 11 is arranged on the plunger cylinder 22 in a reciprocating manner, the crank handle 1 is hinged on the grease gun head 12 through a connecting shaft 5, arc-shaped sliding grooves 2 are correspondingly formed in two sides of the hand crank 1, sliding wheels 3 are correspondingly arranged on the arc-shaped sliding grooves 2, sliding shafts 4 connected with the plungers 11 are arranged on the sliding wheels 3 on the two sides, and the sliding wheels 3 can convert sliding friction between the sliding shafts 4 and the arc-shaped sliding grooves 2 into rolling friction between the sliding wheels 3 and the arc-shaped sliding grooves 2; through the reciprocating opening and closing motion of the hand crank 1, the sliding wheel 3 moves back and forth on the arc-shaped sliding groove 2, and the sliding wheel 3 pushes the plunger 11 to do linear reciprocating motion in the plunger cylinder 22 through the sliding shaft 4 to extrude oil.

According to the involute principle, the normal on any point on the involute is consistent with the tangent from the point to the base circle. The utility model discloses design according to the principle of gradually bursting at the seams and combining the structural feature of grease gun, use the central point R of connecting axle 5 as the centre of a circle of base circle, use the central point R of connecting axle 5 to the distance RB of plunger 11 central line plumb line nodical B be the base circle radius, use the base circle gradually burst at the seams as the datum line of 2 circular arcs of arc sliding tray, actual conditions such as the motion stroke that combines plunger 11, crank 1's angle of opening and shutting designs arc sliding tray 2, the line of 4's centre of a circle A of sliding shaft to nodical between B is plunger 11 direction of motion. When the hand crank 1 is at the most open position, as shown in fig. 3, the sliding wheel 3 is located at the end of the arc-shaped sliding groove 2 at the far end relative to the connecting shaft 5, the moving direction of the plunger 11 pushed by the sliding shaft 4 and the connecting line included angle theta between the sliding shaft 4 and the circle center O of the arc-shaped sliding groove are controlled within 20 degrees, and the optimal included angle is 13 degrees. When the moving direction of the sliding shaft 4 pushing the plunger 11 coincides with the connecting line between the sliding shaft 4 and the arc-shaped sliding groove circle center 0, as shown in fig. 2. When the hand crank 1 is in the folding position, as shown in fig. 1, the sliding wheel 3 is located at the end of the arc-shaped sliding groove 2 opposite to the near end of the connecting shaft 5, the moving direction of the plunger 11 pushed by the sliding shaft 4 and the connecting line included angle theta between the sliding shaft 4 and the circle center 0 of the arc-shaped sliding groove are controlled within 20 degrees, and the optimal included angle is 13 degrees. The pressure generated by any contact point of the sliding wheel 3 and the arc-shaped sliding groove 2 can be ensured to be maximum when the hand crank 1 is shaken, the loss is minimum, and the hand crank is labor-saving and portable in operation and use.

When the hand crank 1 is at the most open position, the distance from the connecting shaft 5 to the connecting line between the sliding shaft 4 and the circle center O of the arc-shaped sliding groove is the length L1 of the resistance arm, when the moving direction of the plunger 11 is overlapped with the connecting line between the sliding shaft 4 and the circle center O of the arc-shaped sliding groove, the distance from the connecting shaft 5 to the connecting line between the sliding shaft 4 and the circle center O of the arc-shaped sliding groove is the length L2 of the resistance arm, when the hand crank 1 is closed to the position, the distance from the connecting shaft 5 to the connecting line between the sliding shaft 4 and the circle center O of the arc-shaped sliding groove is the length L3 of the resistance arm, and L1 is more than L2 is more than L3, when the plunger 11 is pushed to work, the circle center O of the arc-shaped sliding groove gradually moves upwards, the length of the resistance arm is gradually shortened, so that the pushing force of the hand crank 1.

Fig. 4 shows that the utility model discloses ideal state schematic diagram based on involute principle makes, the tangent line and the normal of base circle and plunger direction of motion collineation, nevertheless the application receives the influence of factors such as product structure, appearance, intensity on the product, does not reach ideal state, can only control as far as possible that sliding shaft 4 promotes the direction of motion of plunger 11 and sliding shaft 4 and the line contained angle theta between the arc sliding tray centre of a circle 0 is the better.

Fig. 5 shows the utility model discloses oil discharging device's cooperation structure sketch map, for the convenience release, install the check valve structure on the passageway 10 that produces oil of grease gun head 12, the check valve structure is including installing non return steel ball 9, non return spring 8 and the oil outlet mouth 6 on the passageway 10 that produces oil in proper order. In order to achieve the purpose of pressure relief, the grease gun head 12 is provided with an oil unloading device, the oil unloading device comprises an oil unloading channel 18 communicated with the oil outlet channel 10, an oil return channel 21 communicated with the oil storage cylinder 14, an oil unloading steel ball 19 and an oil unloading screw 20, the oil unloading steel ball 19 is arranged on the grease gun head 12 and controls the oil unloading channel 18 and the oil return channel 21 to be connected or disconnected. Lubricating oil with over-high pressure in the oil outlet channel after oil injection can be quickly returned to the oil storage cylinder 14 to realize pressure relief, so that the connecting nozzle can be easily taken down from the machine equipment, no lubricating oil is wasted, the oil injection is sanitary and clean, and the operation and the use are convenient

In order to achieve the purpose of exhausting, an exhaust channel is arranged on the grease gun head 12, and an exhaust nozzle 7 is arranged on the exhaust channel. To facilitate the filling of the reservoir 14, the piston rod of the spring piston assembly 16 extends out of the rear cover 15 and is connected to a handle 17.

The above description is only the specific embodiment of the present invention, and is not intended to limit the present invention in any form, and the present invention does not depart from the technical solution of the present invention, and the made simple modification, equivalent change or modification all fall into the protection scope of the present invention.

Claims

1. The utility model provides an involute type grease gun, including oil storage barrel (14), correspond and fix grease gun head (12) and back lid (15) at oil storage barrel (14) both ends, elastic piston subassembly (16) of setting in oil storage barrel (14), plunger (11), crank (1), be equipped with plunger cylinder (22) on grease gun head (12), the tip of plunger cylinder (22) is equipped with out oil passageway (10), the middle part be equipped with communicating oil feed passageway (13) of oil storage barrel (14), plunger (11) can set up on plunger cylinder (22) reciprocating motion, crank (1) articulates on grease gun head (12) through connecting axle (5), characterized by: arc-shaped sliding grooves (2) are correspondingly formed in the two sides of the hand crank (1), sliding wheels (3) are correspondingly arranged on the arc-shaped sliding grooves (2), and sliding shafts (4) connected with the plungers (11) are arranged on the sliding wheels (3) on the two sides; through the reciprocating opening and closing motion of the hand crank (1), the sliding wheel (3) moves back and forth on the arc-shaped sliding groove (2), and the sliding wheel (3) pushes the plunger (11) to do linear reciprocating motion in the plunger cylinder (22) through the sliding shaft (4) to extrude oil.

2. The involute grease gun of claim 1, wherein: the center point (R) of the connecting shaft (5) is used as the center of a base circle, the distance (RB) from the center point (R) of the connecting shaft (5) to the perpendicular line intersection point (B) of the center line of the plunger (11) is used as the radius of the base circle, the involute of the base circle is used as the datum line of the arc sliding groove (2), when the hand crank (1) is at the most open position, the sliding wheel (3) is positioned at the end part of the arc sliding groove (2) opposite to the far end of the connecting shaft (5), and the included angle theta between the moving direction of the sliding shaft (4) for pushing the plunger (11) and the connecting line between the sliding shaft (4) and the center (O) of the arc sliding groove is controlled; when the hand crank (1) is closed, the sliding wheel (3) is positioned at the end part of the arc-shaped sliding groove (2) corresponding to the near end of the connecting shaft (5), and the moving direction of the plunger (11) pushed by the sliding shaft (4) and the included angle theta of the connecting line between the sliding shaft (4) and the circle center (O) of the arc-shaped sliding groove are controlled within 20 degrees.

3. The involute grease gun of claim 2, wherein: when the crank handle (1) is at the most open position, the distance from the connecting shaft (5) to the connecting line between the sliding shaft (4) and the arc-shaped sliding groove circle center (O) is the length L1 of the resistance arm, when the moving direction of the plunger (11) is overlapped with the connecting line between the sliding shaft (4) and the arc-shaped sliding groove circle center (O), the distance from the connecting shaft (5) to the connecting line between the sliding shaft (4) and the arc-shaped sliding groove circle center (O) is the length L2 of the resistance arm, when the crank handle (1) is closed to the position, the distance from the connecting shaft (5) to the connecting line between the sliding shaft (4) and the arc-shaped sliding groove circle center (O) is the length L3 of the resistance arm, and L1 is more than L2 more than L3, when the plunger (11) is pushed to work, the arc-shaped sliding groove circle center (O) gradually.

4. The involute grease gun of claim 1, wherein: the grease gun head (12) is provided with an oil unloading device, the oil unloading device comprises an oil unloading channel (18) communicated with the oil outlet channel (10), an oil return channel (21) communicated with the oil storage cylinder body (14), an oil unloading steel ball (19) and an oil unloading screw (20), and the oil unloading steel ball and the oil unloading screw are arranged on the grease gun head (12) and control the oil unloading channel (18) and the oil return channel (21) to be connected or disconnected.

5. The involute grease gun of any one of claims 1 to 4, wherein: and a check steel ball (9), a check spring (8) and an oil outlet nozzle (6) are sequentially arranged on an oil outlet channel (10) of the grease gun head (12).

6. The involute grease gun of claim 5, wherein: and an exhaust channel is arranged on the grease gun head (12), and an exhaust nozzle (7) is arranged on the exhaust channel.

7. The involute grease gun of claim 6, wherein: the piston rod of the elastic piston assembly (16) extends out of the rear cover (15) and is connected with a handle (17).