CN217815120U

CN217815120U - Manual end cover for reversing valve with gear rack structure

Info

Publication number: CN217815120U
Application number: CN202221960465.8U
Authority: CN
Inventors: 范建强; 戚振红; 孙坚; 张建军
Original assignee: Xuzhou Amakai Hydraulic Technology Co ltd
Current assignee: Xuzhou Amakai Hydraulic Technology Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-11-15
Anticipated expiration: 2032-07-28

Abstract

The utility model discloses a manual end cover for reversing valve of rack and pinion structure belongs to hydrovalve technical field. Comprises a front cover body and a handle; the front end cover body is fixed on the valve body; the valve core hole of the valve body is matched with a valve core rod, and the front end cover body is opposite to the valve core rod; a gear is rotatably arranged in the front end cover body, and the handle is fixedly connected with the gear; a rack is fixed at one end of the valve core rod close to the front end cover body; the rack extends into the front end cover body and is meshed with the gear. The transmission structure of the handle and the valve core rod of the utility model adopts a structure form of matching the gear and the rack, so that the multi-way valve is more stable and reliable in reversing, the manual control precision is improved, and the requirement of a high-pressure large-flow reversing valve on the manual reversing precision can be met; the gear adopts the bearing structure of two support ring cooperation O type circles, and sealing performance is good, avoids taking place the condition that fluid was revealed.

Description

Manual end cover for reversing valve with gear rack structure

Technical Field

The utility model relates to a hydrovalve technical field specifically is a rack and pinion structure's manual end cover for reversing valve.

Background

The hydraulic reversing valve plays a role of a control element in a hydraulic loop, is provided with more than two oil ports, comprises an oil inlet, an oil return port and an oil outlet after reversing, and realizes communication and cutting of hydraulic oil through reversing of a valve rod; the end covers are arranged at two ends of a reversing valve body, a reversing valve core is fixed in the valve body, and a hydraulic control device, an electric control device or a manual device and the like are usually arranged on the end covers.

The reversing mode of the hydraulic reversing valve is generally as follows: hydraulic control reversing, electric control reversing, manual reversing or a combination of the two. The manual reversing hydraulic valve generally adopts a ball head and pin shaft mode, the valve core is reversed by utilizing a lever principle, and after a reversing handle is loosened, the valve core is reset through spring force. In the occasion with high proportion precision requirement, the manual reversing adopting the mode can only meet simple reversing and can not realize high-precision reversing.

For example, chinese patent discloses a manual proportional directional valve (CN 207145359U), which includes: the front end cover is provided with a handle, and a transmission structure is arranged in the front end cover and is connected with the handle in a matching way; the hydraulic control valve comprises a valve body, wherein a main hole of the valve body, an oil inlet P, a working oil port A, a working oil port B, an oil return port T and a through oil duct are arranged in the valve body; and the rear end cover is communicated with the valve body.

The prior art has the following defects:

the transmission structure at the end part of the handle adopts a ball head structure, and when the handle rotates, the ball head at the end part of the handle pushes or pulls the valve core; the handle with the structure form has poor reversing stability and cannot meet the working condition requirement of precise reversing control.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a rack and pinion structure's switching-over valve is with manual end cover. The manual end cover provides a stable reversing device for the high-flow reversing valve, and meets the requirement of the high-pressure high-flow reversing valve on the manual reversing precision.

The utility model discloses a following technical scheme realizes: a manual end cover for a reversing valve with a gear rack structure comprises a front end cover body and a handle; the front end cover body is fixed on the valve body; the valve core hole of the valve body is provided with a valve core rod in a matching way, and the front end cover body is opposite to the valve core rod; a gear is rotatably arranged in the front end cover body, and the handle is fixedly connected with the gear; a rack is fixed at one end of the valve core rod close to the front end cover body; the rack extends into the front end cover body, and the rack is meshed with the gear.

It further comprises the following steps: one end of the valve core rod close to the front end cover body is provided with a threaded hole; and a threaded column is fixed at one end of the rack close to the valve core rod, and the threaded column of the rack is installed in a threaded hole at the end part of the valve core rod through threaded connection.

The gear shaft center is provided with a rotating shaft which is rotatably arranged in the front end cover body; the handle is fixedly connected with one end of the rotating shaft.

The gear and the rotating shaft are integrally formed.

The one end of pivot is seted up threaded hole, and the external screw thread is seted up to handle one end, and the handle external screw thread end is installed in the screw hole of pivot one end through threaded connection.

The rotating shaft is sleeved with a left support ring and a right support ring which are respectively arranged at two sides of the gear; o-shaped rings are arranged between the inner walls of the left support ring and the right support ring and the rotating shaft; the left support ring and the right support ring are fixed in the front end cover body, and the sealing covers are arranged above the left support ring and the right support ring.

The O-shaped ring is arranged in a groove formed in the rotating shaft.

A rear end cover body is arranged at one end of the valve core rod, which is far away from the rack, and the rear end cover body is fixed on the valve body; a T-shaped seat is fixed at one end of the valve core rod, which is far away from the rack, and a left spring seat and a right spring seat are sleeved on the T-shaped seat; the left spring seat is supported on the valve body and the valve core rod, and the left side of the right spring seat is supported on the T-shaped seat and the rear end cover body.

The T-shaped seat is fixed at one end, far away from the rack, of the valve core rod through a bolt.

Compared with the prior art, the beneficial effects of the utility model are that: the transmission structure of the handle and the valve core rod adopts a structure form of matching a gear and a rack, so that the multi-way valve is more stable and reliable in reversing, the manual control precision is improved, and the requirement of the high-pressure large-flow reversing valve on the manual reversing precision can be met; the gear adopts the bearing structure of two support ring cooperation O type circles, and sealing performance is good, avoids taking place the condition that fluid was revealed.

Drawings

Fig. 1 is a longitudinal section of a manual end cover for a reversing valve of the utility model;

fig. 2 is a transverse section of the manual end cover for the reversing valve of the utility model;

FIG. 3 is an enlarged view of FIG. 1 at the rear end cover;

in the figure: the valve comprises a gear 1, a rotating shaft 1-1, a rack 2, a handle 3, a front end cover body 4, a left support ring 5-1, a right support ring 5-2, an O-shaped ring 6, a valve body 7, a valve core rod 8, a bolt 9, a rear end cover body 10, a left spring seat 11-1, a right spring seat 11-2, a spring 12, a T-shaped seat 13 and a sealing cover 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 2, a manual end cover for a reversing valve of a rack and pinion structure is provided, and a front end cover body 4 is fixed on a valve body 7. The valve core hole of the valve body 7 is provided with a valve core rod 8 in a matching way, and the front end cover body 4 is opposite to the left end of the valve core rod 8. The left end of the valve core rod 8 is provided with a threaded hole, one end of the rack 2 close to the valve core rod 8 is fixed with a threaded column, and the threaded column of the rack 2 is installed in the threaded hole in the end part of the valve core rod 8 through threaded connection. The rack 2 extends into the front end cover body 4, and the rack 2 is meshed with the gear 1.

The axis of the gear 1 is provided with a rotating shaft 1-1, the gear 1 and the rotating shaft 1-1 are integrally formed, and the rotating shaft 1-1 is rotatably arranged in the front end cover body 4. The rotating shaft 1-1 is sleeved with a left support ring 5-1 and a right support ring 5-2 which are respectively arranged at two sides of the gear 1. O-shaped rings 6 are arranged between the inner walls of the left support ring 5-1 and the right support ring 5-2 and the rotating shaft 1-1, and the O-shaped rings 6 are arranged in grooves formed in the rotating shaft 1-1. The left support ring 5-1 and the right support ring 5-2 are fixed in the front end cover body 4, and a sealing cover 14 is arranged above the left support ring 5-1 and the right support ring 5-2.

One end of the rotating shaft 1-1 is provided with a threaded hole, one end of the handle 3 is provided with an external thread, and the external thread end of the handle 3 is installed in the threaded hole at one end of the rotating shaft 1-1 through threaded connection.

Referring to fig. 1 and 3, a rear end cover 10 is provided at the right end of the valve core rod 8, and the rear end cover 10 is fixed to the valve body 7. One end of the valve core rod 8, which is far away from the rack 2, is fixed with a T-shaped seat 13 through a bolt 9, and the T-shaped seat 13 is sleeved with a left spring seat 11-1 and a right spring seat 11-2. A spring 12 is arranged between the left spring seat 11-1 and the right spring seat 11-2, under the action of the elastic force of the spring 12, the left side of the left spring seat 11-1 is abutted against the valve body 7 and the valve core rod 8, and the left side of the right spring seat 11-2 is abutted against the T-shaped seat 13 and the rear end cover body 10.

The working principle is as follows:

an O-shaped ring 6 is arranged on the gear 1 and then is placed in the front end cover 4, and the O-shaped ring plays a role in sealing; the left and right support rings are arranged at two sides of the front end cover body 4, and the central holes of the left and right support rings are sleeved on the gear to play a role in supporting and fixing the gear; the handle 3 is in threaded connection with the gear 1 and plays a role of rotating the gear; the gear 1 and the rack 2 are engaged by gear teeth, the rack 2 is connected with the valve core rod 8 through threads, and when the handle 3 drives the gear 1 to rotate, the rack 2 moves along with the gear, and meanwhile, the valve core rod 8 is driven to move, so that the reversing purpose is achieved.

Utility model selects rack and pinion structure's switching-over device, and it makes the switching-over of multiple unit valve reliable and more stable, improves the manual control precision, has solved the problem that provides a stable switching-over device for large-traffic switching-over valve, satisfies the demand of high-pressure large-traffic switching-over valve to manual switching-over precision.

The preferred embodiments of the present invention disclosed above are intended to aid in the description of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A manual end cover for a reversing valve with a gear rack structure comprises a front end cover body (4) and a handle (3); the front end cover body (4) is fixed on the valve body (7); a valve core rod (8) is arranged in the valve core hole of the valve body (7) in a matching manner, and the front end cover body (4) is opposite to the valve core rod (8); the method is characterized in that: a gear (1) is rotatably arranged in the front end cover body (4), and the handle (3) is fixedly connected with the gear (1); a rack (2) is fixed at one end of the valve core rod (8) close to the front end cover body (4); the rack (2) extends into the front end cover body (4), and the rack (2) is meshed with the gear (1).

2. The manual end cover for a gear rack structured directional control valve according to claim 1, wherein: one end of the valve core rod (8) close to the front end cover body (4) is provided with a threaded hole; one end of the rack (2) close to the valve core rod (8) is fixed with a threaded column, and the threaded column of the rack (2) is installed in a threaded hole in the end of the valve core rod (8) through threaded connection.

3. The manual end cover for a gear rack structured directional control valve according to claim 1, wherein: the axis of the gear (1) is provided with a rotating shaft (1-1), and the rotating shaft (1-1) is rotatably arranged in the front end cover body (4); the handle (3) is fixedly connected with one end of the rotating shaft (1-1).

4. The manual end cover for the reversing valve of the gear rack structure as claimed in claim 3, wherein: the gear (1) and the rotating shaft (1-1) are integrally formed.

5. The manual end cover for the reversing valve of the gear rack structure as claimed in claim 3, wherein: one end of the rotating shaft (1-1) is provided with a threaded hole, one end of the handle (3) is provided with an external thread, and the external thread end of the handle (3) is installed in the threaded hole at one end of the rotating shaft (1-1) through threaded connection.

6. The manual end cover for the reversing valve of the gear rack structure as claimed in claim 3, wherein: the rotating shaft (1-1) is sleeved with a left support ring (5-1) and a right support ring (5-2) which are respectively arranged at two sides of the gear (1); o-shaped rings (6) are arranged between the inner walls of the left support ring (5-1) and the right support ring (5-2) and the rotating shaft (1-1); the left support ring (5-1) and the right support ring (5-2) are fixed in the front end cover body (4), and a sealing cover (14) is arranged above the left support ring (5-1) and the right support ring (5-2).

7. The manual end cover for the reversing valve of the gear rack structure as claimed in claim 6, wherein: the O-shaped ring (6) is arranged in a groove formed in the rotating shaft (1-1).

8. The manual end cover for the reversing valve of the gear rack structure as claimed in claim 1, wherein: a rear end cover body (10) is arranged at one end, far away from the rack (2), of the valve core rod (8), and the rear end cover body (10) is fixed on the valve body (7); a T-shaped seat (13) is fixed at one end of the valve core rod (8) far away from the rack (2), and a left spring seat (11-1) and a right spring seat (11-2) are sleeved on the T-shaped seat (13); a spring (12) is arranged between the left spring seat (11-1) and the right spring seat (11-2), under the elastic force action of the spring (12), the left side of the left spring seat (11-1) is abutted against the valve body (7) and the valve core rod (8), and the left side of the right spring seat (11-2) is abutted against the T-shaped seat (13) and the rear end cover body (10).

9. The manual end cover for a gear-rack structured reversing valve according to claim 8, wherein: the T-shaped seat (13) is fixed at one end, far away from the rack (2), of the valve core rod (8) through a bolt (9).