CN216328099U

CN216328099U - Small-size electric hammer cylinder assembly

Info

Publication number: CN216328099U
Application number: CN202122618253.3U
Authority: CN
Inventors: 俞建忠; 孟令军
Original assignee: Zhejiang Juchi Auto Parts Co ltd
Current assignee: Zhejiang Juchi Auto Parts Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-19
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a small electric hammer cylinder assembly which comprises a cylinder sleeve, wherein a retainer ring and a third ring groove are sequentially arranged on the outer wall of the cylinder sleeve from left to right, and a first clamp spring is clamped on the inner side of the third ring groove. According to the utility model, the wear-resistant sleeves made of polytetrafluoroethylene are arranged on the outer walls of the impact piston and the power piston, so that the wear condition between the cylinder sleeve and the piston can be greatly reduced, the influence of powder on the service life of a sealing ring is avoided, the wear-resistant sleeves are very convenient to replace through the arrangement of the mounting steps and the second snap spring, the connecting rod and the power piston are connected by adopting an elastic pin structure, two ends of the movable pin do not extend out of the outer wall of the power piston, the risk of scratching the inner wall of the cylinder sleeve caused by separation in work is avoided, and the connecting rod can be conveniently taken out from the power piston through a quick-release structure.

Description

Small-size electric hammer cylinder assembly

Technical Field

The utility model relates to the technical field of electric hammers, in particular to a small-sized electric hammer cylinder assembly.

Background

Small-size electric hammer is often used in the house ornamentation trade, small in size portable, through collecting user's personnel and maintenance personal's feedback information discovery, the higher trouble of frequency takes place for the common electric hammer in the market at present, it is not to take place to strike or the impact force is very little, discover most reasons through the maintenance inspection because the unusual wearing and tearing of sealing washer lead to gas leakage or pressure very little, and the most abundant powdered material in the cylinder body after the dismantlement, the analysis takes place the piece that unusual friction produced for piston and cylinder body in the course of the work, the piece squeezes into the wearing and tearing in advance that lead to the sealing washer between sealing washer and the cylinder body, in addition, the round pin axle that is used for connecting rod and power piston also appears taking place to become flexible, lead to deviating from in the one end of round pin axle from the power piston, with the serious fish tail of cylinder body inner wall, lead to unable pressurize.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a small electric hammer cylinder assembly.

In order to achieve the purpose, the utility model adopts the following technical scheme: the small electric hammer cylinder assembly comprises a cylinder sleeve, wherein a retainer ring and a third ring groove are sequentially arranged on the outer wall of the cylinder sleeve from left to right, and a first clamp spring is clamped on the inner side of the third ring groove; the first spring and the umbrella-shaped gear are sequentially sleeved on the outer wall of the cylinder sleeve and are positioned between the retainer ring and the first clamp spring, and a flat key is further arranged between the umbrella-shaped gear and the cylinder sleeve; the impact piston and the power piston are sequentially connected in a sliding manner in the cylinder sleeve from left to right; the sealing assembly is arranged among the impact piston, the outer wall of the power piston and the cylinder sleeve and used for sealing, and the wear-resisting assembly is used for preventing wear; the power piston is rotatably connected with the connecting rod far away from one end of the impact piston through the elastic pin structure, the end part of the power piston far away from the impact piston is provided with a quick-release structure for quickly disassembling and assembling the connecting rod, and the connecting rod is far away from one end inner wall of the power piston and is fixedly connected with a steel sleeve.

As a further description of the above technical solution:

the sealing assembly comprises two groups of sealing rings, the outer walls of the impact piston and the power piston are provided with first annular grooves, and the sealing rings are respectively sleeved on the inner sides of the two groups of first annular grooves and the outer walls of the two groups of first annular grooves and are connected with the cylinder sleeve in a sliding mode.

As a further description of the above technical solution:

wear-resisting subassembly includes two sets of wear-resisting covers, second jump ring, strike piston, power piston outer wall and be located first annular right side and all set gradually installation step, second annular, it is two sets of the second jump ring joint is inboard at two sets of second annular respectively, and is two sets of wear-resisting cover is established respectively to be established and is just all located between installation step and the second jump ring at strike piston, power piston outer wall, and is two sets of wear-resisting cover material is polytetrafluoroethylene.

As a further description of the above technical solution:

the bullet round pin structure includes cotter, second spring and two sets of locating hole, activity round pin, cotter fixed connection is kept away from the one end inner wall of steel bushing at the connecting rod, the cotter is formed by two sets of shell threaded connection that set up relatively, and is two sets of the activity round pin is relative set up equal sliding connection and runs through cotter upper wall and lower wall respectively in cotter inside and one side of carrying on the back.

As a further description of the above technical solution:

the two groups of positioning holes are formed in the inner side wall of the power piston and are respectively located on the upper side and the lower side, the end portions, extending out of the pin sleeves, of the two groups of movable pins are respectively in rotating connection with the two groups of positioning holes, and the connecting rod is in rotating connection with the power piston through the two groups of movable pins and the positioning holes.

As a further description of the above technical solution:

the quick-release structure comprises a second sliding groove and two first sliding grooves, the second sliding groove is arranged on the inner side wall of the power piston in the circumferential direction and communicated with two groups of positioning holes, the two first sliding grooves are oppositely arranged on the inner side wall of the power piston, and the two first sliding grooves are axially arranged and communicated with the second sliding grooves.

The utility model has the following beneficial effects:

1. compared with the prior art, this small-size electric hammer cylinder assembly sets up the wear-resisting cover that polytetrafluoroethylene made at impact piston and power piston outer wall, but the wearing and tearing condition between greatly reduced cylinder jacket and the piston avoids appearing the powder and influences the sealing washer life-span, and through the setting of installation step and second jump ring, it is very convenient to change wear-resisting cover.

2. Compared with the prior art, this small-size electric hammer cylinder assembly adopts bullet round pin structural connection between connecting rod and power piston, and the power piston outer wall is not stretched out at activity round pin both ends, has avoided deviating from the risk that leads to cylinder jacket inside wall fish tail in the work, and through quick detach structure, can be very convenient take out the connecting rod from the power piston.

Drawings

Fig. 1 is a schematic view of the overall structure of a small electric hammer cylinder assembly according to the present invention;

fig. 2 is a partial sectional view showing the overall structure of a small-sized electric hammer cylinder assembly according to the present invention;

fig. 3 is a partially enlarged view of a portion a of the small-sized electric hammer cylinder assembly according to the present invention shown in fig. 2;

fig. 4 is a sectional view of a cylinder sleeve structure of a small electric hammer cylinder assembly according to the present invention;

FIG. 5 is a sectional view of the power piston structure of the small-sized electric hammer cylinder assembly according to the present invention;

FIG. 6 is a side cross-sectional view of the power piston of the small-sized electric hammer cylinder assembly according to the present invention;

fig. 7 is a sectional view showing the structure of a pin bush, a movable pin and a spring of a cylinder assembly for a small electric hammer according to the present invention.

Illustration of the drawings:

1. a cylinder liner; 2. a retainer ring; 3. a first spring; 4. a bevel gear; 5. a first clamp spring; 6. a power piston; 7. a connecting rod; 8. steel jacket; 9. an impact piston; 10. a seal ring; 11. a wear-resistant sleeve; 12. a second clamp spring; 13. a flat bond; 14. a first ring groove; 15. mounting a step; 16. a second ring groove; 17. positioning holes; 18. a first chute; 19. a second chute; 20. a pin bush; 21. a movable pin; 22. a second spring; 23. a third ring groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a small-sized electric hammer cylinder assembly: the air cylinder sleeve comprises an air cylinder sleeve 1, wherein a retainer ring 2 and a third ring groove 23 are sequentially arranged on the outer wall of the air cylinder sleeve 1 from left to right, and a first clamp spring 5 is clamped on the inner side of the third ring groove 23; the first spring 3 and the bevel gear 4 are sequentially sleeved on the outer wall of the cylinder sleeve 1 and positioned between the retainer ring 2 and the first clamp spring 5, a flat key 13 is further arranged between the bevel gear 4 and the cylinder sleeve 1, and the bevel gear 4 and the flat key 13 are used for transmitting rotating torque;

the impact piston 9 and the power piston 6 are sequentially connected with the inside of the cylinder sleeve 1 in a sliding manner from left to right, and a sealing component and a wear-resistant component are arranged between the outer walls of the impact piston 9 and the power piston 6 and the cylinder sleeve 1 for sealing and preventing wear;

the sealing assembly comprises two groups of sealing rings 10, the outer walls of the impact piston 9 and the power piston 6 are respectively provided with a first ring groove 14, the two groups of sealing rings 10 are respectively sleeved on the inner sides of the two groups of first ring grooves 14, the outer walls of the impact piston 9 and the power piston 6 are respectively connected with the cylinder sleeve 1 in a sliding manner, the wear-resistant assembly comprises two groups of wear-resistant sleeves 11 and a second snap spring 12, the outer walls of the impact piston 9 and the power piston 6 and positioned on the right side of the first ring groove 14 are respectively provided with a mounting step 15 and a second ring groove 16 in sequence, the two groups of second snap springs 12 are respectively clamped on the inner sides of the two groups of second ring grooves 16, the two groups of wear-resistant sleeves 11 are respectively sleeved on the outer walls of the impact piston 9 and the power piston 6 and are both positioned between the mounting step 15 and the second snap spring 12, the two groups of wear-resistant sleeves 11 are made of polytetrafluoroethylene, the surfaces of which are smooth and have small friction resistance and are very wear-resistant, and the cylinder sleeve 11 is made of polytetrafluoroethylene, so that the power piston 6 and the impact piston 9 can timely generate abnormal vibration and can not generate friction with the cylinder sleeve 1 in work, and through the arrangement of the installation step 15 and the second clamp spring 12, the wear-resistant sleeve 11 is very convenient to replace, and the service lives of the power piston 6 and the impact piston 9 are greatly prolonged.

The connecting rod 7 is rotatably connected to one end, far away from the impact piston 9, of the power piston 6 through an elastic pin structure, a quick-release structure for quickly dismounting and mounting the connecting rod 7 is arranged at the end, far away from the impact piston 9, of the power piston 6, a steel sleeve 8 is fixedly connected to the inner wall of one end, far away from the power piston 6, of the connecting rod 7, and the steel sleeve 8 is used for being connected with a driving structure of an electric hammer;

the elastic pin structure comprises a pin bush 20, a second spring 22, two groups of positioning holes 17 and movable pins 21, wherein the pin bush 20 is fixedly connected to the inner wall of one end of the connecting rod 7 far away from the steel sleeve 8, the pin bush 20 is formed by connecting two groups of oppositely arranged shell threads, the two groups of movable pins 21 are oppositely arranged, are connected inside the pin bush 20 in a sliding manner, and are arranged on the opposite sides, the two sides are opposite to each other and respectively penetrate through the upper wall and the lower wall of the pin bush 20, the movable pins 21 can retract into the pin bush 20 by extruding the second spring 22, the two groups of positioning holes 17 are arranged on the inner side wall of the power piston 6 and are respectively positioned on the upper side and the lower side, the end parts, extending out of the pin bush 20, of the two groups of movable pins 21 are respectively connected with the two groups of positioning holes 17 in a rotating manner, the connecting rod 7 is connected with the power piston 6 in a rotating manner through the two groups of movable pins 21 and the positioning holes 17, the quick-dismantling structure comprises a second sliding groove 19 and two first sliding grooves 18, the second sliding groove 19 is arranged on the inner side wall 6 of the power piston in the circumferential direction and is communicated with the two groups of positioning holes 17, two first chutes 18 are oppositely arranged on the inner side wall of the power piston 6, two first chutes 18 are axially arranged and are communicated with the second chute 19, when the connecting rod 7 is installed, the movable pin 21 is aligned to the first chutes 18, the connecting rod 7 is pushed into the power piston 6 along the first chutes 18, when the connecting rod is pushed to the second chute 19, the power piston 6 and the connecting rod 7 are reversely rotated, so that the movable pin 21 slides into the positioning hole 17 along the second chute 19, the installation is completed, the reverse operation can be removed during the disassembly, and the positioning hole 17 does not penetrate through the side wall of the power piston 6, so that the movable pin 21 cannot be separated during the operation.

The working principle is as follows: the movable pin 21 can be retracted into the pin sleeve 20 by extruding the second spring 22, when the connecting rod 7 is installed, the movable pin 21 is aligned with the first sliding groove 18, the connecting rod 7 is pushed into the power piston 6 along the first sliding groove 18, when the connecting rod is pushed into the second sliding groove 19, the power piston 6 and the connecting rod 7 rotate reversely, so that the movable pin 21 slides into the positioning hole 17 along the second sliding groove 19, the installation is completed, the reverse operation can be removed during the removal, because the positioning hole 17 does not penetrate through the side wall of the power piston 6, the movable pin 21 cannot be separated during the work, the two sets of wear-resistant sleeves 11 are made of polytetrafluoroethylene, the surfaces of the polytetrafluoroethylene are smooth, the friction resistance is small, the wear-resistant sleeves 11 are very wear-resistant, the power piston 6 and the impact piston 9 can timely generate abnormal vibration during the work and cannot rub against the cylinder sleeve 1, and the steps 15 and the second snap spring 12 are arranged, the wear-resistant sleeve 11 is very convenient to replace, and the service lives of the power piston 6 and the impact piston 9 are greatly prolonged.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. Small-size electric hammer cylinder assembly, its characterized in that: the air cylinder sleeve comprises an air cylinder sleeve (1), wherein a retainer ring (2) and a third ring groove (23) are sequentially arranged on the outer wall of the air cylinder sleeve (1) from left to right, and a first clamp spring (5) is clamped on the inner side of the third ring groove (23);

the first spring (3) and the umbrella-shaped gear (4) are sequentially sleeved on the outer wall of the cylinder sleeve (1) and are positioned between the retainer ring (2) and the first clamp spring (5), and a flat key (13) is further arranged between the umbrella-shaped gear (4) and the cylinder sleeve (1);

the impact piston (9) and the power piston (6) are sequentially connected in a sliding manner in the cylinder sleeve (1) from left to right;

the sealing assembly and the wear-resisting assembly are arranged between the impact piston (9), the outer wall of the power piston (6) and the cylinder sleeve (1) for sealing and preventing wear;

connect through bullet round pin structure rotation power piston (6) are kept away from connecting rod (7) of impact piston (9) one end, the tip of keeping away from impact piston (9) power piston (6) is provided with the quick detach structure who is used for connecting rod (7) quick assembly disassembly, the one end inner wall fixedly connected with steel bushing (8) of power piston (6) are kept away from in connecting rod (7).

2. The compact electric hammer cylinder assembly of claim 1, wherein: the sealing assembly comprises two sets of sealing rings (10), the outer walls of the impact piston (9) and the power piston (6) are provided with first annular grooves (14) and are two sets of the sealing rings (10) are respectively sleeved on the inner sides of the first annular grooves (14) and the outer walls of the first annular grooves and are connected with the cylinder sleeve (1) in a sliding mode.

3. The compact electric hammer cylinder assembly of claim 2, wherein: wear-resisting subassembly includes two sets of wear-resisting cover (11), second jump ring (12), it all has set gradually installation step (15), second annular (16), two sets of to strike piston (9), power piston (6) outer wall and be located first annular (14) right side second jump ring (12) joint respectively is inboard at two sets of second annular (16), and is two sets of wear-resisting cover (11) is established respectively and is established and establish and strike piston (9), power piston (6) outer wall and all be located between installation step (15) and second jump ring (12), and is two sets of wear-resisting cover (11) material is polytetrafluoroethylene.

4. A compact electric hammer cylinder assembly according to claim 3, wherein: the bullet round pin structure includes cotter pin cover (20), second spring (22) and two sets of locating hole (17), removable pin (21), the one end inner wall of steel bushing (8) is kept away from in cotter pin cover (20) fixed connection at connecting rod (7), cotter pin cover (20) is formed by two sets of shell threaded connection that set up relatively, and is two sets of removable pin (21) are relative set up equal sliding connection and run through cotter pin cover (20) upper wall and lower wall respectively in cotter pin cover (20) inside and the one side that deviates from mutually.

5. The compact electric hammer cylinder assembly of claim 4, wherein: two sets of locating hole (17) all set up in power piston (6) inside wall and lie in both sides from top to bottom respectively, and are two sets of the tip that movable pin (21) stretched out pin bushing (20) rotates with two sets of locating hole (17) respectively to be connected, connecting rod (7) rotate with power piston (6) through two sets of movable pins (21), locating hole (17) and are connected.

6. The compact electric hammer cylinder assembly of claim 5, wherein: the quick-release structure comprises a second sliding groove (19) and two first sliding grooves (18), the second sliding groove (19) is arranged on the inner side wall of the power piston (6) in the circumferential direction and communicated with the two groups of positioning holes (17), the two first sliding grooves (18) are oppositely arranged on the inner side wall of the power piston (6), and the two first sliding grooves (18) are axially arranged and communicated with the second sliding groove (19).