CN218993043U

CN218993043U - Manual grease gun piston assembly

Info

Publication number: CN218993043U
Application number: CN202222833001.7U
Authority: CN
Inventors: 孙伟明; 孙杨薇; 王力
Original assignee: Yangzhou Yuanrun Industry And Trade Co ltd
Current assignee: Yangzhou Yuanrun Industry And Trade Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-05-09
Anticipated expiration: 2032-10-26

Abstract

A manual grease gun piston assembly belongs to the technical field of manual lubricating oil supply equipment, a piston disc, a pull rod, a support disc and a spring are arranged in a cylinder body, the pull rod is fixedly connected with the piston disc, the spring is arranged between the piston disc and the support disc, a sealing piece and a rolling piece are arranged on the outer circular surface of the piston disc, and the piston disc is in sealing sliding connection with the inner wall of the cylinder body under the action of the pull rod and the spring. The rolling piece reduces the contact area between the piston disc and the inner wall of the cylinder, combines sliding friction with rolling friction, generates good coaxial clearance between the piston disc and the inner wall of the cylinder, reduces friction resistance in the whole circumferential direction, and is beneficial to the movement of the piston disc in the cylinder; the setting of supporting disk makes the spring axial atress more even, has reduced the crooked phenomenon after the spring is pressed, more does benefit to the stable use of piston assembly, and the smooth and easy slip of piston disk in the barrel easily makes manual pull rod pulling more light, has reduced operator's the work degree of difficulty.

Description

Manual grease gun piston assembly

Technical Field

The utility model belongs to the technical field of manual lubricating oil supply equipment, relates to an internal structure of a grease gun, and particularly relates to a manual grease gun piston assembly.

Background

At present, common name of grease used for lubricating industrial machinery, automobiles and equipment is butter, and most of the grease is barreled or bagged. When in use, the lubricating grease is taken out from the barrel or the bag and is filled into the storage cavity of the grease gun; the common grease guns can be divided into manual type, pedal type, pneumatic type and electric type according to the power source, wherein the pedal type grease gun is labor-saving in use, heavy in quality and suitable for being used in fixed places; the manual grease gun piston is of a cylindrical leather cup structure, when the thickness of the piston is too thin, the grease gun is insufficient in use pressure due to insufficient strength of the leather cup, and after the thickness of the leather cup is increased, larger friction resistance is formed when the leather cup slides with the inner wall of a gun barrel, the pull rod is pulled, and when the piston is pushed by the spring in a resetting mode, larger elastic force is needed to be generated on the piston, so that the manual grease gun is not beneficial to use.

Disclosure of Invention

Aiming at the defects that when the thickness of a piston in the existing manual grease gun is too thin, the use pressure of the grease gun is insufficient due to insufficient strength of the piston, a large friction resistance is formed between the grease gun and the inner wall of a cylinder body due to excessively thick leather cup, the pull rod is forceful when pulled, the spring is required to generate large elastic force for the piston when the piston is pushed in a resetting mode, and the like, the utility model provides the manual grease gun piston assembly.

The manual grease gun piston assembly that this application provided adopts following technical scheme:

the manual grease gun piston assembly comprises a cylinder, a front cover arranged on one side of the cylinder, a rear cover arranged on the other side of the cylinder, an oil outlet, a connecting rod and an oil pushing plunger which are arranged on the front cover in a connecting way, and a manual compression bar connected with the connecting rod; the method is characterized in that: the novel sealing device is characterized in that a piston disc, a pull rod, a supporting disc and a spring are arranged inside the cylinder body, the pull rod penetrates through the rear cover and the supporting disc in sequence and then is fixedly connected with the piston disc, the spring is arranged between the piston disc and the supporting disc, a sealing piece and a rolling piece are arranged on the outer circular surface of the piston disc, and the piston disc is in sealing sliding connection with the inner wall of the cylinder body under the action of the pull rod and the spring.

Through adopting above-mentioned technical scheme, set up sealing member and rolling element on the disc outer disc, sealing member can make disc and barrel inner wall form better sealing connection, and the rolling element can make disc and barrel inner wall form better sliding connection, and the setting of supporting disk is in order when spring deformation, and spring axial atress is more even, does not produce the bending, more does benefit to the stable use of piston assembly.

Further, the head of the pull rod is provided with external threads, the end face of the piston disc is provided with a threaded hole, and the pull rod is connected with the piston disc through the external threads in a screwing mode.

Through adopting above-mentioned technical scheme, make pull rod and piston disc form comparatively firm connection, and can dismantle between the two, be convenient for change and exchange between later stage each part.

Further, the external thread is provided with a fastening nut, and the locking between the pull rod and the piston disc is realized through the fastening nut.

Through adopting above-mentioned technical scheme, in order to make the connection between pull rod and the piston disc more stable, prevent that the grease gun from producing not hard up between pull rod and the piston disc in the use.

Further, the sealing member comprises mounting groove and sealing washer, and the mounting groove is seted up on the outer disc of piston disc, and the sealing washer joint is in the mounting groove, and the quantity of mounting groove is not less than 2.

By adopting the technical scheme, the sealing performance between the piston disc and the cylinder body is more stable.

Further, the rolling element comprises mounting hole, spring, ball, and the mounting hole sets up on the outer disc of piston disc, and the spring setting is in the bottom of mounting hole, and the ball is arranged in on the spring.

By adopting the technical scheme, the contact area between the piston disc and the inner wall of the cylinder body is reduced, and the sliding friction and the rolling friction are combined, so that the piston disc is beneficial to the movement in the cylinder body.

Further, the number of the rolling elements is not less than 4, and the rolling elements are uniformly distributed on the same outer circumference between the mounting grooves.

Through adopting above-mentioned technical scheme, the rolling element that the equipartition set up makes to produce better coaxial clearance between piston disc and the barrel inner wall, has reduced the frictional resistance on the whole circumferencial direction, does benefit to the motion of piston disc.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the uniformly distributed rolling elements reduce the contact area between the piston disc and the inner wall of the cylinder, combine sliding friction with rolling friction, generate good coaxial clearance between the piston disc and the inner wall of the cylinder, reduce the friction resistance in the whole circumferential direction and facilitate the movement of the piston disc in the cylinder;

2. the sealing piece is arranged on the outer circular surface of the piston disc, so that the piston disc and the inner wall of the cylinder body can form better sealing connection, the use pressure in the cylinder body of the butter gun is ensured, and the continuous performance of oil output is stable;

3. the arrangement of the supporting disc enables the axial stress of the spring to be more uniform, reduces the bending phenomenon of the spring after being pressed, and is more beneficial to the stable use of the piston assembly;

4. the piston disc slides smoothly in the cylinder body, so that the manual pull rod is easy to pull more conveniently, and the working difficulty of an operator is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

FIG. 3 is a schematic cross-sectional view of the structure at B-B in FIG. 1.

In the figure: the hydraulic cylinder comprises a compression rod handle 1, a manual compression rod 2, an oil pushing plunger 3, a connecting rod 4, an oil outlet 5, an exhaust hole 6, a front cover 7, a cylinder 8, a pull rod 9, a first spring 10, a support disc 11, a rear cover 12, a mounting hole 13, a piston disc 14, a second spring 15, a mounting groove 16, balls 17, a sealing ring 18 and a fastening nut 19.

Detailed Description

The present utility model is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the present patent and not limiting the scope of the present patent, and various modifications to the equivalent of the present patent will fall within the scope of the appended claims to which the present patent pertains after reading the present patent.

Example 1

As shown in fig. 1, the manual grease gun piston assembly comprises a cylinder 8, a front cover 7 arranged on one side of the cylinder 8, a rear cover 12 arranged on the other side of the cylinder 8, an oil outlet 5, a connecting rod 4 and an oil pushing plunger 3 which are arranged on the front cover 7 in a connecting way, and a manual compression bar 2 connected with the connecting rod 4; the cylinder 8 is internally provided with a piston disc 14, a pull rod 9, a support disc 11 and a first spring 10, the head of the pull rod 9 is provided with external threads, the end surface of the piston disc 14 is provided with a threaded hole, and the pull rod 9 is connected with the piston disc 14 through the external threads in a screwing way; the external thread is provided with a fastening nut 18, and the locking between the pull rod 9 and the piston disc 14 is realized through the fastening nut 18. The first spring 10 is arranged between the piston disc 14 and the supporting disc 11, a sealing piece and a rolling piece are arranged on the outer circular surface of the piston disc 14, and the piston disc 14 and the inner wall of the cylinder 8 form sealing sliding connection under the action of the pull rod 9 and the first spring 10.

Example 2

As shown in fig. 2-3, in order to improve the sealing performance of the piston and the inner wall of the cylinder and reduce the friction resistance, the manual grease gun piston assembly is provided with a sealing element on the outer circular surface of the piston disc 14, wherein the sealing element consists of a mounting groove 16 and a

sealing ring

18, 2 or 4 sealing grooves are uniformly arranged at intervals between the mounting groove 16 in order to obtain the sealing performance of the piston disc 14 and the inner wall of the cylinder 8, and the sealing ring 18 is clamped in the mounting groove 16; in order to enable the piston disc 14 and the inner wall of the cylinder body 8 to form better sliding fit, rolling elements are arranged on the outer circular surface of the piston disc 14, each rolling element consists of a mounting hole 13, a second spring 15 and balls 17, the second spring 15 is arranged at the bottom of the mounting hole 13, the balls 17 are arranged on the second spring 15, the whole rolling elements are uniformly distributed on the same outer circumference between the mounting grooves 16, the number of the rolling elements on the same circumference is set to 4-8 groups, and the whole rolling elements are arranged between the sealing elements.

As shown in fig. 1-3, the manual grease gun piston assembly is installed and functions as follows: the pull rod 9 sequentially passes through the rear cover 12 and the supporting disc 11, the first spring 10 is sleeved on the pull rod 9, the head of the pull rod 9 is in spiral connection with the piston disc 14, the fastening nut 19 is tightly propped against the end face of the piston disc 14 after connection so as to realize anti-loose connection between the pull rod 9 and the piston disc 14, the sealing ring 18 is clamped into the mounting groove 16 on the piston disc 14, the ball 17 and the second spring 15 are arranged in the mounting hole 13, the piston disc 14, the pull rod 9, the first spring 10 and the supporting disc 11 are mounted into the cylinder 8, and finally the rear cover 12 is screwed. When the grease pushing device is used, the front cover 7 is unscrewed, the pull rod 9 drives the piston disc 14 to slide backwards and compress the first spring 10, grease is filled in the cavity, the front cover 7 is covered, the piston disc 14 is driven to prop against the grease under the reset action of the first spring 10, the manual pressure rod 2 drives the grease pushing plunger 3, and the grease is continuously extruded from the oil outlet.

Claims

1. The manual grease gun piston assembly comprises a cylinder body (8), a front cover (7) arranged on one side of the cylinder body (8), a rear cover (12) arranged on the other side of the cylinder body (8), an oil outlet (5) arranged on the front cover (7), a connecting rod (4), an oil pushing plunger (3) and a manual compression bar (2) connected with the connecting rod (4); the method is characterized in that: the novel high-pressure cylinder is characterized in that a piston disc (14), a pull rod (9), a supporting disc (11) and a first spring (10) are arranged inside the cylinder body (8), the pull rod (9) sequentially penetrates through a rear cover (12) and the supporting disc (11) and then is fixedly connected with the piston disc (14), the first spring (10) is arranged between the piston disc (14) and the supporting disc (11), a sealing piece and a rolling piece are arranged on the outer circular surface of the piston disc (14), and the piston disc (14) is in sealing sliding connection with the inner wall of the cylinder body (8) under the action of the pull rod (9) and the first spring (10).

2. The manual grease gun piston assembly of claim 1, wherein: the head of the pull rod (9) is provided with external threads, the end face of the piston disc (14) is provided with a threaded hole, and the pull rod (9) is connected with the piston disc (14) through the external threads in a screwing mode.

3. The manual grease gun piston assembly of claim 2, wherein: the external thread is provided with a fastening nut (19), and the locking between the pull rod (9) and the piston disc (14) is realized through the fastening nut (19).

4. The manual grease gun piston assembly of claim 1, wherein: the sealing element consists of mounting grooves (16) and sealing rings (18), the mounting grooves (16) are formed in the outer circular surface of the piston disc (14), the sealing rings (18) are clamped in the mounting grooves (16), and the number of the mounting grooves (16) is not less than 2.

5. The manual grease gun piston assembly of claim 1, wherein: the rolling element consists of a mounting hole (13), a second spring (15) and a ball (17), wherein the mounting hole (13) is arranged on the outer circular surface of the piston disc (14), the spring (15) is arranged at the bottom of the mounting hole (13), and the ball (17) is arranged on the second spring (15).

6. The manual grease gun piston assembly of claim 5, wherein: the number of the rolling elements is not less than 4, and the rolling elements are uniformly distributed on the same outer circumference between the mounting grooves (16).