CN210830424U

CN210830424U - Multi-stage piston rod

Info

Publication number: CN210830424U
Application number: CN201921214248.2U
Authority: CN
Inventors: 戴菁菁
Original assignee: Zhejiang Hengze Machinery Co ltd
Current assignee: Zhejiang hengze metallurgical and Chemical Machinery Co.,Ltd.
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-06-23
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a multistage piston rod, including first shaft section and seventh shaft section, be provided with second shaft section, third shaft section, fourth shaft section, fifth shaft section and sixth shaft section between first shaft section and the seventh shaft section, first fixed orifices has been seted up to the terminal surface of first shaft section, second fixed orifices and preformed hole have been seted up to the terminal surface of seventh shaft section, be provided with two chucking axle blocks on the second shaft section, the inside of fourth shaft section is provided with buffer structure, the inside of sixth shaft section is provided with the chucking structure, and has seted up fourth connecting thread on the sixth shaft section. A multistage piston rod, can alleviate the impact of piston rod end face and shaft shoulder through buffer structure to avoid the cylinder body to take place to damage, pass through connecting thread with the piston and install on the shaft part, then through the chucking structure with the piston chucking on the shaft part, avoid the piston to take place to remove on the shaft part, the piston connection is comparatively firm.

Description

Multi-stage piston rod

Technical Field

The utility model relates to a piston rod structural design field, in particular to multistage piston rod.

Background

The piston rod is a connecting part for supporting the piston to do work, most of the piston rod is applied to an oil cylinder and an air cylinder movement execution part, the piston rod is a movement part with frequent movement and high technical requirements, the hydraulic oil cylinder is taken as an example and consists of a cylinder barrel, a piston rod (an oil cylinder rod), a piston and an end cover, the service life and the reliability of the whole product are directly influenced by the quality of the processing quality of the piston rod, the processing requirement of the piston rod is high, the surface roughness requirement of the piston rod is Ra0.4-0.8 um, and the requirements on coaxiality and wear resistance are. But when current multistage piston rod is using with piston screw-thread fit, make piston rod and piston take place to become flexible easily to the acting when influencing the piston motion, when the piston rod contacts with the cylinder body inner wall, there is the impact force simultaneously, produces the damage to the cylinder body.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a multistage piston rod, which can effectively solve the problems of the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a multistage piston rod, includes first shaft segment and seventh shaft segment, be provided with second shaft segment, third shaft segment, fourth shaft segment, fifth shaft segment and sixth shaft segment between first shaft segment and the seventh shaft segment, first fixed orifices has been seted up to the terminal surface of first shaft segment, second fixed orifices and preformed hole have been seted up to the terminal surface of seventh shaft segment, be provided with two chucking axle blocks on the second shaft segment, the inside of fourth shaft segment is provided with buffer structure, the inside of sixth shaft segment is provided with the chucking structure, and has seted up fourth connecting thread on the sixth shaft segment.

Preferably, the buffering structure comprises a rubber pad, a moving block, a first expansion spring, a first moving groove, a fixing ring, an end cover and a first connecting thread, the fixing ring is clamped inside the fourth shaft section through interference fit, the first moving groove is formed inside the fixing ring, the moving block is arranged inside the first moving groove, the rubber pad is arranged on the moving block, the moving block is connected with the end cover through the first expansion spring, and the end cover is connected with the fixing ring through the first connecting thread.

Preferably, the clamping structure includes fixed block, second connecting thread, third connecting thread, movable block, second shifting chute and second expanding spring, the second shifting chute has been seted up to the inside of fixed block, the inside of second shifting chute is provided with the movable block, set up on the movable block with fourth screw thread matched with third connecting thread, the movable block is connected with the fixed block through second expanding spring, first fixed block is connected with the sixth shaft section through second connecting thread.

Preferably, the total length between the first shaft section, the second shaft section and the sealing groove is 288 mm.

Preferably, the two sides of the clamping shaft block are both provided with clamping grooves, and clamping blocks are arranged in the clamping grooves.

Preferably, the sixth shaft section is connected with the piston through a fourth connecting thread.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses in, be provided with buffer structure, can alleviate the impact of piston rod end face and shaft shoulder through buffer structure to avoid the cylinder body to take place to damage, be provided with chucking structure, pass through connecting thread with the piston and install on the shaft part, then through chucking structure with the piston chucking on the shaft part, avoid the piston to take place to remove on the shaft part, piston connection is comparatively firm.

Drawings

Fig. 1 is a schematic view of the overall structure of a multi-stage piston rod according to the present invention;

fig. 2 is a schematic view of a first fixing hole of a multi-stage piston rod according to the present invention;

fig. 3 is a schematic view of a second fixing hole of a multi-stage piston rod according to the present invention;

fig. 4 is a schematic view of a multi-stage piston rod clamping groove of the present invention;

fig. 5 is a schematic view illustrating the installation of the buffering structure of the multi-stage piston rod according to the present invention;

fig. 6 is an internal schematic view of a buffering structure of the multi-stage piston rod according to the present invention;

fig. 7 is a schematic view of a clamping structure of a multi-stage piston rod according to the present invention.

In the figure: 1. a first shaft section; 2. a second shaft section; 3. clamping the shaft block; 4. a sealing groove; 5. a third shaft section; 6. a fourth shaft section; 7. a fifth shaft section; 8. a sixth shaft section; 9. a seventh shaft section; 10. a buffer structure; 1001. a rubber pad; 1002. a moving block; 1003. a first extension spring; 1004. a first moving slot; 1005. a fixing ring; 1006. an end cap; 1007. a first connecting thread; 11. a clamping structure; 1101. a fixed block; 1102. a second connecting thread; 1103. a third connecting thread; 1104. a movable block; 1105. a second moving slot; 1106. a second extension spring; 12. a first fixing hole; 13. a second fixing hole; 14. reserving a hole; 15. a clamping groove; 16. and a fourth connecting thread.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-7, a multi-stage piston rod includes a first shaft segment 1 and a seventh shaft segment 9, a second shaft segment 2, a third shaft segment 5, a fourth shaft segment 6, a fifth shaft segment 7 and a sixth shaft segment 8 are disposed between the first shaft segment 1 and the seventh shaft segment 9, a first fixing hole 12 is disposed on an end surface of the first shaft segment 1, a second fixing hole 13 and a preformed hole 14 are disposed on an end surface of the seventh shaft segment 9, two clamping shaft blocks 3 are disposed on the second shaft segment 2, a buffer structure 10 is disposed inside the fourth shaft segment 6, a clamping structure 11 is disposed inside the sixth shaft segment 8, and a fourth connecting thread 16 is disposed on the sixth shaft segment 8;

the buffer structure 10 comprises a rubber pad 1001, a moving block 1002, a first expansion spring 1003, a first moving groove 1004, a fixing ring 1005, an end cover 1006 and a first connecting thread 1007, wherein the fixing ring 1005 is clamped inside the fourth shaft section 6 through interference fit, the first moving groove 1004 is formed inside the fixing ring 1005, the moving block 1002 is arranged inside the first moving groove 1004, the rubber pad 1001 is arranged on the moving block 1002, the moving block 1002 is connected with the end cover 1006 through the first expansion spring 1003, and the end cover 1006 is connected with the fixing ring 1005 through the first connecting thread 1007; the clamping structure 11 comprises a fixed block 1101, a second connecting thread 1102, a third connecting thread 1103, a movable block 1104, a second moving groove 1105 and a second expansion spring 1106, the second moving groove 1105 is formed in the fixed block 1101, the movable block 1104 is arranged in the second moving groove 1105, the third connecting thread 1103 matched with a fourth thread is formed in the movable block 1104, the movable block 1104 is connected with the fixed block 1101 through the second expansion spring 1106, and the first fixed block 1101 is connected with the sixth shaft section 8 through the second connecting thread 1102; the total length among the first shaft section 1, the second shaft section 2 and the sealing groove 4 is 288 mm; the two sides of the clamping shaft block 3 are both provided with clamping grooves 15, and the clamping grooves 15 are internally provided with clamping blocks; the sixth shaft section 8 is connected to the piston by a fourth connecting thread 16.

It should be noted that, the present invention is a multi-stage piston rod, which is processed according to a first shaft segment 1, a second shaft segment 2, a clamping shaft block 3, a sealing groove 4, a third shaft segment 5, a fourth shaft segment 6, a fifth shaft segment 7, a sixth shaft segment 8 and a seventh shaft segment 9, then a first fixing hole 12 and a second fixing hole 13 are opened at both ends of the piston rod, and the total length of the first shaft segment 1, the second shaft segment 2 and the sealing groove 4 is 288mm, then the multi-stage piston rod is processed as a one-stage to five-stage piston rod according to the installation size for the third shaft segment 5, the fourth shaft segment 6, the fifth shaft segment 7, the sixth shaft segment 8 and the seventh shaft segment 9, so as to satisfy the requirements, then the clamping groove 15 is opened on the clamping shaft block 3, a buffer structure 10 is installed on the fourth shaft segment 6 by interference fit, a clamping structure 11 is installed on the sixth shaft segment 8 by a second connecting thread, when the piston is installed, the piston is installed on the sixth shaft section 8 through the fourth connecting thread 16, because two sides of the movable block 1104 of the clamping structure 11 are provided with chamfers, when the piston is installed, the movable block 1104 is connected with the piston, the movable block 1104 moves along the second moving groove 1105 under the action of the second extension spring 1106 in the fixed block 1101, the third connecting thread 1103 of the movable block 1104 is tightly connected with the piston, the sealing ring is installed in the sealing groove 4, the sealing ring is contacted with the inner wall of the cylinder body for sealing, the connecting piece outside the cylinder body is fixedly installed on the end face of the piston rod through the first fixing hole 12 and the bolt, when the piston rod moves and is contacted with the inner wall of the cylinder body, under the action of the first extension spring 1003 on the fixing ring 1005, one end of the first extension spring 1003 is abutted against the end cover 1006, the other end of the first extension spring 1003 is abutted against the movable block 1002, and the moving block 1002 moves along the first moving groove 1004, and at this time, the rubber pad 1001 of the buffer structure 10 contacts with the inner wall of the cylinder body, thereby preventing the cylinder body from being damaged.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A multi-stage piston rod characterized by: including first shaft section (1) and seventh shaft section (9), be provided with second shaft section (2), third shaft section (5), fourth shaft section (6), fifth shaft section (7) and sixth shaft section (8) between first shaft section (1) and seventh shaft section (9), first fixed orifices (12) have been seted up to the terminal surface of first shaft section (1), second fixed orifices (13) and preformed hole (14) have been seted up to the terminal surface of seventh shaft section (9), be provided with two chucking axle blocks (3) on second shaft section (2), the inside of fourth shaft section (6) is provided with buffer structure (10), the inside of sixth shaft section (8) is provided with chucking structure (11), and has seted up fourth connecting thread (16) on sixth shaft section (8).

2. A multistage piston rod according to claim 1, characterized in that: the buffer structure (10) comprises a rubber pad (1001), a moving block (1002), a first telescopic spring (1003), a first moving groove (1004), a fixing ring (1005), an end cover (1006) and a first connecting thread (1007), wherein the fixing ring (1005) is clamped inside a fourth shaft section (6) through interference fit, the first moving groove (1004) is formed in the fixing ring (1005), the moving block (1002) is arranged inside the first moving groove (1004), the rubber pad (1001) is arranged on the moving block (1002), the moving block (1002) is connected with the end cover (1006) through the first telescopic spring (1003), and the end cover (1006) is connected with the fixing ring (1005) through the first connecting thread (1007).

3. A multistage piston rod according to claim 1, characterized in that: the clamping structure (11) comprises a fixed block (1101), a second connecting thread (1102), a third connecting thread (1103), a movable block (1104), a second moving groove (1105) and a second expansion spring (1106), wherein the second moving groove (1105) is formed in the fixed block (1101), the movable block (1104) is arranged in the second moving groove (1105), the third connecting thread (1103) matched with a fourth thread is formed in the movable block (1104), the movable block (1104) is connected with the fixed block (1101) through the second expansion spring (1106), and the first fixed block (1101) is connected with the sixth shaft section (8) through the second connecting thread (1102).

4. A multistage piston rod according to claim 1, characterized in that: the total length among the first shaft section (1), the second shaft section (2) and the sealing groove (4) is 288 mm.

5. A multistage piston rod according to claim 1, characterized in that: the clamping shaft is characterized in that clamping grooves (15) are formed in two sides of the clamping shaft block (3), and clamping blocks are arranged in the clamping grooves (15).

6. A multistage piston rod according to claim 1, characterized in that: the sixth shaft section (8) is connected with the piston through a fourth connecting thread (16).