CN210599652U

CN210599652U - Spring oil cylinder

Info

Publication number: CN210599652U
Application number: CN201921339882.9U
Authority: CN
Inventors: 陈丽娇
Original assignee: Harbin General Hydraulic Machinery Manufacturing Co ltd
Current assignee: Harbin General Hydraulic Machinery Manufacturing Co ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-22
Anticipated expiration: 2029-08-16

Abstract

The utility model provides a spring oil cylinder, it includes: a cylinder housing; a piston slidably coupled to the cylinder housing and having a positioning structure; one end of the spring is connected with the oil cylinder shell, and the other end of the spring is connected with the positioning structure; and one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates through the spring along the axial direction of the spring. The utility model discloses in, through set up location structure on the piston, the both ends of spring can be connected with hydro-cylinder casing and this location structure respectively, thereby realized comparatively comprehensive location to the spring, can prevent that it from rocking etc. at flexible in-process, can effectively avoid the contact of spring and piston rod and hydro-cylinder casing inside wall from this, with reduce the flexible in-process of spring to the friction of piston rod or hydro-cylinder casing, prevent the emergence of the condition such as oil leak, thereby effectively promote spring cylinder's life.

Description

Spring oil cylinder

Technical Field

The utility model relates to a technical field of hydro-cylinder particularly, relates to a spring cylinder.

Background

The oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and performs reciprocating motion, and when the oil cylinder is used for realizing the reciprocating motion, a speed reducing device can be omitted, no transmission gap exists, the motion process is stable, and therefore the oil cylinder is widely applied to hydraulic systems of various machines. In the prior art, for example, the oil cylinder used in the hydraulic system of the plate press is generally formed by casting, has a small volume and an integrated structure, and is relatively complex in preparation process. To the spring hydro-cylinder, be provided with the spring that is used for the reseing in its cylinder body usually, however prior art's spring is usually not fixed, rocks easily at its flexible in-process to the inside wall of friction piston rod or cylinder body, in the long-term use, the condition such as oil leak appears easily, influences hydraulic system's normal operating.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide a spring cylinder which can effectively prevent a spring from rubbing a piston rod or a cylinder housing during a telescopic process.

Therefore, the utility model provides a spring oil cylinder, it includes: a cylinder housing; a piston slidably coupled to the cylinder housing and having a positioning structure; one end of the spring is connected with the oil cylinder shell, and the other end of the spring is connected with the positioning structure; and one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates through the spring along the axial direction of the spring.

The utility model discloses in, through set up location structure on the piston, the both ends of spring can be connected with hydro-cylinder casing and this location structure respectively, thereby realized comparatively comprehensive location to the spring, can prevent that it from rocking etc. at flexible in-process, can effectively avoid the contact of spring and piston rod and hydro-cylinder casing inside wall from this, with reduce the flexible in-process of spring to the friction of piston rod or hydro-cylinder casing, prevent the emergence of the condition such as oil leak, thereby effectively promote spring cylinder's life.

Additionally, the utility model provides an among the spring cylinder, optionally, location structure is the reference column, the spring another pot head is located on the reference column. From this, through the setting of reference column, fixed connection between realization spring that can be more convenient and piston promotes the installation convenience of spring cylinder.

Furthermore, in the spring cylinder provided by the utility model, optionally, the reference column with the size phase-match of spring. Preferably, the outer diameter of the positioning post is the same as the inner diameter of the spring. Under this condition, the spring can just overlap and locate on the reference column, can ensure the stability that the two are connected, prevents the spring and in flexible in-process from the emergence of the circumstances such as drop from the reference column.

Furthermore, in the spring cylinder provided by the utility model, optionally, still be provided with two at least spacing archs on the reference column, have two relative settings at least in the spacing arch. Under the condition, can further inject the connection between spring and the reference column through spacing arch, promote the stability that the two are connected from this, further prevent the spring from the emergence of the circumstances such as coming off from the reference column in flexible process.

Additionally, in the spring cylinder provided by the utility model, optionally, the cylinder casing includes cylinder and flange, the flange cover is located on the cylinder. Therefore, the oil cylinder shell is split, the installation or preparation process of the oil cylinder shell can be further simplified, and the practicability of the spring oil cylinder is improved.

Additionally, the utility model provides an in the spring cylinder, optionally, the spring cylinder still includes: and the limiting structure is arranged in the cylinder barrel and is suitable for limiting the leftward movement distance of the piston. From this, through limit structure's setting, can realize more stable convenient positioning action to the piston, ensure the accuracy of the movement distance of piston, and then ensure the accuracy of the movement distance of its piston rod and external connection subassembly that drives.

Additionally, the utility model provides an among the spring cylinder, optionally, limit structure is limiting sleeve, be provided with first recess in the cylinder, limiting sleeve set up in the first recess. Under the condition, the installation of the limiting sleeve can be more conveniently realized through the arrangement of the first groove, and the installation or preparation process of the spring oil cylinder is further simplified.

Additionally, in the spring cylinder provided by the utility model, optionally, still be provided with the second recess in the cylinder, the spring one end set up in the second recess. Under the condition, through the arrangement of the second groove, the connection between the spring and the oil cylinder shell can be more effectively realized, and the mounting stability of the spring is improved.

Additionally, the utility model provides an in the spring cylinder, optionally, be provided with seal structure on the piston, seal structure includes at least one of Y type sealing washer, O type sealing washer, U type sealing washer and V type sealing washer. From this, through seal structure's setting, can promote the leakproofness of being connected between piston and the cylinder to prevent the emergence of the circumstances such as oil leak, effectively strengthen spring cylinder's stability in use and high efficiency.

Additionally, in the spring cylinder provided by the utility model, optionally, be provided with wear ring on the piston rod, be suitable for and reduce the piston rod with the friction of cylinder inside wall. Under this condition, through the setting of wear-resisting ring, can effectively reduce the frictional force between piston rod and the cylinder inside wall, make the friction between piston rod and the cylinder inside wall turn into the friction of wear-resisting ring and cylinder inside wall, effectively protect the piston rod, promote the life of piston rod.

Additionally, in the spring cylinder provided by the utility model, optionally, the piston rod the one end pass through the screw with the piston forms fixed connection. Under this condition, can more effectual realization piston and the fixed connection of piston rod through the screw, promote the stability of being connected between the two to promote spring cylinder's stability in use.

Additionally, in the spring cylinder provided by the utility model, optionally, the piston rod the other end is provided with the stopper, is suitable for the restriction the distance that the piston moved to the right. Under this condition, through the setting of stopper, can realize the restriction to the displacement of piston rod on the one hand to the restriction to the displacement of piston is realized, on the other hand can be more convenient realization piston rod and external connection subassembly be connected.

According to the utility model discloses, can provide one kind can prevent effectively that the spring from to the friction of piston rod or hydro-cylinder casing at flexible in-process to thereby prevent the oil leak and prolong its life's spring cylinder.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a spring cylinder according to an embodiment of the present invention;

fig. 2 is a schematic partial structural view of a spring cylinder according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a cylinder housing of a spring cylinder according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a sectional view of a part of the spring cylinder according to the embodiment of the present invention;

FIG. 6 is a partial enlarged view of FIG. 5 at B;

fig. 7 is a side view of a spring cylinder according to an embodiment of the present invention.

Description of reference numerals:

1-a cylinder shell, 11-a cylinder barrel, 111-a first groove, 112-a second groove, 12-a flange, 121-a positioning hole, 2-a piston, 21-a positioning structure, 211-a limiting protrusion, 3-a spring, 4-a piston rod, 41-a limiting block, 5-a limiting structure, 6-a sealing structure, 7-a wear-resistant ring and 8-a screw.

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

In addition, all directions or positional relationships mentioned in the embodiments of the present invention are positional relationships based on the drawings, and the "up, down, left, right, front, and back" coordinate system appearing in the drawings is only for the convenience of understanding the simplified description of the present invention, and does not imply that a specific orientation that a device or element referred to must have is not to be construed as limiting the present invention.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 is a schematic structural view of a spring cylinder according to an embodiment of the present invention; fig. 2 is a partial schematic structural view of a spring cylinder according to an embodiment of the present invention.

Fig. 1 and 2 schematically show only the structure of the spring cylinder according to the present embodiment, and the description of other structures of the spring cylinder will be omitted in the following description. As shown in fig. 1 and 2, the spring cylinder according to the present embodiment may include a cylinder housing 1, a piston 2 slidably coupled to the cylinder housing 1 and having a positioning structure 21, a spring 3 having one end coupled to the cylinder housing 1 and the other end coupled to the positioning structure 21, and a piston rod 4 having one end coupled to the piston 2 and the other end passing through the spring 3 in an axial direction of the spring 3. Here, the one end or the other end refers to an end of a certain side, for example, a left side end or a right side end, that is, one end of the spring may be a left end or a right end of the spring, and accordingly, the other end of the spring may be a right end or a left end of the spring; one end of the piston rod may be the left or right end of the piston rod, and correspondingly, the other end of the piston rod may be the right or left end of the piston rod. The axial direction of the spring refers to the direction in which the coils of the spring encircle, i.e., the direction of movement of the spring when the spring is stretched or contracted.

In this embodiment, through set up location structure on the piston, the both ends of spring can be connected with hydro-cylinder casing and this location structure respectively, thereby realized comparatively comprehensive location to the spring, can prevent that it from rocking etc. at flexible in-process, can effectively avoid the contact of spring and piston rod and hydro-cylinder casing inside wall from this, to reduce the flexible in-process of spring to the friction of piston rod or hydro-cylinder casing, prevent the emergence of the circumstances such as oil leak, thereby effectively promote spring cylinder's life.

In the present embodiment, the structure of the positioning structure 21 is not particularly limited. In some examples, the positioning structure 21 may be a positioning post, and the other end of the spring 3 may be sleeved on the positioning post. From this, through the setting of reference column, fixed connection between realization spring that can be more convenient and piston promotes the installation convenience of spring cylinder.

In the present embodiment, the shape of the positioning column is not particularly limited. In some examples, it may be a regular shape, such as a circle, square, etc. In other examples, it may also be an irregular shape, or a combination of regular and irregular shapes. Therefore, positioning columns in different shapes can be arranged according to the needs of actual conditions, and different application requirements are met.

In addition, in the present embodiment, the sizes of the positioning column and the spring 3 may be matched. In some examples, the outer diameter of the locating post may be the same as the inner diameter of the spring 3. Under this condition, the spring can just overlap and locate on the reference column, can ensure the stability that the two are connected, prevents the spring and in flexible in-process from the emergence of the circumstances such as drop from the reference column.

In addition, in the present embodiment, as shown in fig. 2, the positioning column may further be provided with a limit protrusion 211. In some examples, the stop protrusion 211 may be at least two, such as three, four, five, etc. In other examples, at least two of the retaining protrusions 211 are oppositely disposed. Under the condition, can further inject the connection between spring and the reference column through spacing arch, promote the stability that the two are connected from this, further prevent the spring from the emergence of the circumstances such as coming off from the reference column in flexible process.

In addition, in this embodiment, the positioning column may further be provided with a limiting groove. In some examples, the retaining groove may be disposed around the locating post. In other examples, the other end of the spring 3 can be sleeved on the positioning column by being clamped in the limiting groove. From this, can further inject being connected between spring and the reference column through spacing recess, promote the stability that the two are connected from this, further prevent the spring from the emergence of the circumstances such as drop from the reference column in flexible process.

In the present embodiment, the connection form between the piston rod 4 and the piston 2 is not particularly limited. In some examples, as shown in fig. 2, one end of the piston rod 4 may be fixedly connected to the piston 2 by a screw 8. In other examples, one end of the piston rod 4 may be fixedly connected to the piston 2 by clamping or welding. Under this condition, can more effectively realize the fixed connection of piston and piston rod through screw or chucking or welded mode, promote the stability of being connected between the two to promote spring cylinder's stability in use.

In the present embodiment, the structure of the piston rod 4 is not particularly limited. In some examples, the other end of the piston rod 4 may be provided with a stopper 41 adapted to limit the distance of the piston 2 moving rightward. In other examples, the size of the stopper 41 may be larger than the size of the piston rod 4. Under this condition, through the setting of stopper, can realize the restriction to the displacement of piston rod on the one hand to the restriction to the displacement of piston is realized, on the other hand can be more convenient realization piston rod and external connection subassembly be connected.

Fig. 3 is a schematic structural view of a cylinder housing of a spring cylinder according to an embodiment of the present invention; fig. 4 is a partially enlarged view of a portion a in fig. 3.

In the present embodiment, as shown in fig. 3, the cylinder housing 1 may include a cylinder tube 11 and a flange 12, and the flange 12 may be sleeved on the cylinder tube 11. In some examples, the flange 12 may be welded to the cylinder 11. In other examples, the flange 12 may be screwed, snapped or adhered to the cylinder 11. Therefore, the oil cylinder shell is split, the installation or preparation process of the oil cylinder shell can be further simplified, and the practicability of the spring oil cylinder is improved.

In the present embodiment, the shape of the cylinder tube 11 is not particularly limited, and may be a regular shape, for example, a cylindrical shape, a square shape, or the like, or may be an irregular shape or a combination of a regular shape and an irregular shape. From this, can design different spring cylinder's shape and size according to actual conditions's demand to satisfy the demand of different application scenes, promote spring cylinder's practicality.

Furthermore, in the present embodiment, the side of the cylinder 11 remote from the flange 12 may be provided with a through hole through which the piston rod 4 is adapted to pass. In some examples, the size of the through hole may match the size of the piston rod 4. In other examples, the size of the stopper 41 may be larger than the size of the through hole. From this, realization piston rod that can be more convenient and fast and external connection subassembly's be connected to, through the matching setting of the size of through-hole, piston rod and stopper, can promote the leakproofness of cylinder, thereby promote spring cylinder's use high efficiency.

In the present embodiment, the size of the spring 3 is not particularly limited. In some examples, the inner diameter of the spring 3 may be larger than the outer diameter of the piston rod 4 and smaller than the inner diameter of the cylinder 11. From this, can prevent effectively that the spring from taking place the emergence of the circumstances such as friction with cylinder inner wall or piston rod outer wall in the motion process, promote the life of spring, further promote the life of spring cylinder.

In this embodiment, the spring cylinder may further include a limiting structure 5 disposed in the cylinder 11 and adapted to limit the distance that the piston 2 moves leftward. In some examples, the size of the stop structure 5 may be larger than the size of the spring 3, e.g., the inner diameter of the stop structure 5 is larger than the outer diameter of the spring 3. In other examples, the dimension of the stop structure 5 may be smaller than the inner diameter of the cylinder 11. From this, through limit structure's setting, can realize more stable convenient positioning action to the piston, ensure the accuracy of the movement distance of piston, and then ensure the accuracy of the movement distance of its piston rod and external connection subassembly that drives.

In the present embodiment, the shape of the stopper structure 5 is not particularly limited, and it may be a regular shape, such as a cylinder, a square, or the like, or it may be an irregular shape or a combination of a regular shape and an irregular shape. In some examples, the restraining structure 5 may be a restraining sleeve, such as a hollow-shaped restraining sleeve. In other examples, as shown in fig. 4, a first groove 111 may be disposed in the cylinder tube 11, and a restraining sleeve may be disposed in the first groove 111. Under the condition, the installation of the limiting sleeve can be more conveniently realized through the arrangement of the first groove, and the installation or preparation process of the spring oil cylinder is further simplified.

In the present embodiment, the connection mode between the stopper structure 5 and the cylinder tube 11 is not particularly limited. In some examples, the limiting structure 5 may be screwed to the cylinder 11. In other examples, the position-limiting structure 5 may also be disposed in the first groove 111, wherein the manner of disposition is not particularly limited, for example, the position-limiting structure 5 may be disposed in the first groove 111 in a snap-fit manner, or may be disposed in the first groove 111 in a screw-thread manner. The clamping type is that the limiting structure is matched with the first groove in size, and the limiting structure is directly sleeved to form stable connection through size matching; the thread type is that the limiting structure and the first groove are respectively provided with an internal thread and an external thread which are matched with each other, and the internal thread and the external thread are matched to form stable connection through rotation. From this, can promote the stability of being connected between limit structure and the cylinder to ensure that the limit effect of accurate realization limit structure to the piston.

In the present embodiment, the length of the stopper structure 5 is not particularly limited. In some examples, the length of the limit structure 5 may be less than the length of the spring 3. Thereby, the spring can be ensured to realize the function of self-resetting.

In this embodiment, a through hole may be provided on a side wall of the stopper structure 5. In some examples, there may be more than two vias. In other examples, at least two through holes may be oppositely arranged, for example, may be located on the same diameter of the circular cross section of the limiting structure 5. From this, in limit structure's installation, can use external device (for example metal pole) to pass the through-hole, and the rotation through manipulating this external device and drive limit structure to the installation or the dismantlement of more convenient effectual realization limit sleeve promotes the convenience of cylinder whole installation or dismantlement.

In the present embodiment, a second groove 112 may be further provided in the cylinder 11, and one end of the spring 3 may be provided in the second groove 112. In some examples, the size of the spring 3 may match the size of the second recess 112. Under the condition, through the arrangement of the second groove, the connection between the spring and the oil cylinder shell can be more effectively realized, and the mounting stability of the spring is improved.

Fig. 5 is a sectional view of a part of the spring cylinder according to the embodiment of the present invention; fig. 6 is a partially enlarged view of fig. 5 at B.

In the present embodiment, as shown in fig. 5, the piston 2 may be provided with a seal structure 6, wherein the type of shape of the seal structure 6 is not particularly limited. In some examples, the sealing structure 6 may include at least one of a Y-seal, an O-seal, a U-seal, and a V-seal, for example, may be used with both a Y-seal and an O-seal. From this, through seal structure's setting, can promote the leakproofness of being connected between piston and the cylinder to prevent the emergence of the circumstances such as oil leak, effectively strengthen spring cylinder's stability in use and high efficiency.

Further, in the present embodiment, the number and the arrangement position of the seal structure 6 are not particularly limited. In some examples, the sealing structure 6 may be more than one, such as two, three, or four, etc. In other examples, the sealing structure 6 may also be disposed between any structural components that need to be sealed, such as between the piston rod 4 and the cylinder 11, i.e., the sealing structure 6 may also be sleeved on the piston rod 4. Therefore, sealing structures in different quantities or different positions can be arranged according to the requirements of actual conditions, and the overall sealing performance of the spring oil cylinder is improved.

In the present embodiment, as shown in fig. 5 and 6, the piston rod 4 may further be provided with a wear ring 7 adapted to reduce friction between the piston rod 4 and the inner side wall of the cylinder 11. Among them, the kind of the shape of the wear-resistant ring 7 is not particularly limited. In some examples, the wear resistant ring 7 may be a support ring of a bronze band. Under this condition, through the setting of wear-resisting ring, can effectively reduce the frictional force between piston rod and the cylinder inside wall, make the friction between piston rod and the cylinder inside wall turn into the friction of wear-resisting ring and cylinder inside wall, effectively protect the piston rod, promote the life of piston rod.

In the present embodiment, the position where the wear ring 7 is provided is not particularly limited. In some examples, the wear ring 7 may also be disposed between any structural components that require friction reduction, such as between the piston 2 and the cylinder 11, i.e., the wear ring 7 may also be sleeved on the piston 2. From this, can set up the wear ring of different quantity or different positions according to actual conditions's needs, reduce the friction between the interior structure of spring cylinder subassembly, promote spring cylinder's life.

In the present embodiment, as shown in fig. 7, the flange 12 may be provided with positioning holes 121. Here, the number and arrangement position of the positioning holes 121 are not particularly limited. In some examples, the positioning holes 121 may be more than one, such as two, three, or four, etc. In other examples, the positioning holes 121 may be oppositely disposed on the flange 12. Therefore, the flange can be connected or positioned with an external component more effectively and conveniently, and the installation or use stability of the spring oil cylinder is improved.

In the present embodiment, the spring cylinder may further include one or more oil holes (not shown), for example, two, three, or four oil holes, to realize the conductive connection between the outside and the inside of the cylinder 11. In some examples, the oil holes may include a first oil hole and a second oil hole, wherein the first oil hole may be in conductive connection with one end of the cylinder tube 11, and the second oil hole may be in conductive connection with the other end of the cylinder tube. In this case, the outer assembly can carry out oil feeding or oil discharging control through the oil hole to control the pressure in the cylinder, realize the pushing action to the piston in different directions (for example, to the left or to the right).

Although the present invention has been disclosed above, the scope of the present invention is not limited thereto. Without departing from the spirit and scope of the present invention, those skilled in the art can make various changes and modifications, which will fall into the protection scope of the present invention.

Claims

1. A spring cylinder, comprising:

a cylinder housing (1);

a piston (2) slidably connected to the cylinder housing (1) and having a positioning structure (21);

a spring (3) with one end connected with the cylinder housing (1) and the other end connected with the positioning structure (21);

and one end of the piston rod (4) is connected with the piston (2), and the other end of the piston rod penetrates through the spring (3) along the axial direction of the spring (3).

2. The spring cylinder according to claim 1, wherein the positioning structure (21) is a positioning column, and the other end of the spring (3) is sleeved on the positioning column.

3. The spring oil cylinder as claimed in claim 1, wherein the oil cylinder housing (1) comprises a cylinder barrel (11) and a flange (12), and the flange (12) is sleeved on the cylinder barrel (11).

4. The spring cylinder of claim 3, further comprising:

and the limiting structure (5) is arranged in the cylinder barrel (11) and is suitable for limiting the leftward movement distance of the piston (2).

5. The spring oil cylinder according to claim 4, characterized in that the limiting structure (5) is a limiting sleeve, a first groove (111) is arranged in the cylinder barrel (11), and the limiting sleeve is arranged in the first groove (111).

6. A spring cylinder according to claim 3, characterized in that a second groove (112) is further provided in the cylinder (11), and the one end of the spring (3) is provided in the second groove (112).

7. The spring cylinder according to claim 1, characterized in that a sealing structure (6) is arranged on the piston (2), and the sealing structure (6) comprises at least one of a Y-shaped sealing ring, an O-shaped sealing ring, a U-shaped sealing ring and a V-shaped sealing ring.

8. A spring cylinder according to claim 3, characterized in that the piston rod (4) is provided with a wear ring (7) adapted to reduce friction between the piston rod (4) and the inner side wall of the cylinder (11).

9. A spring cylinder according to claim 1, characterized in that the one end of the piston rod (4) is in fixed connection with the piston (2) by means of a screw (8).

10. A spring cylinder according to claim 1, characterized in that the other end of the piston rod (4) is provided with a stopper (41) adapted to limit the distance of the piston (2) to move to the right.