CN220396688U - Shifting fork type driving mechanism - Google Patents

Abstract

The utility model relates to a shifting fork type driving mechanism which comprises a bottom plate, a box cover, a driving shaft, a driving block, a sliding block, a shifting fork and a valve shaft, wherein the box cover is fixed above the bottom plate; the driving shaft is fixed on the box cover, the driving shaft is connected with the driving block, the sliding block is connected to the driving block, the driving block moves linearly along the driving shaft, the valve shaft is fixed on the shifting fork, a sliding groove and a clamping groove are formed in the shifting fork, the sliding block is connected with the sliding groove in a sliding mode, and the clamping groove is connected with the valve shaft in a driving mode. Compared with the prior art, the utility model has the advantages of simple structure, convenient installation and the like.

Description

Shifting fork type driving mechanism

Technical Field

The utility model relates to the field of valve driving devices, in particular to a shifting fork type driving mechanism.

Background

Currently, the operating machines on the market are mainly worm and gear operating machines or spur gear operating machines. The worm and gear operating machine has the advantages of large speed ratio, large external dimension, low transmission efficiency and small output torque; the spur gear operation machine has small speed, stable transmission and high transmission efficiency. The two operating machines have the common characteristics of high gear machining difficulty, high gear machining precision requirement, complex heat treatment of gears, high material cost and low protection level.

Most of the conventional speed reducers on the market have protection grades of IP66 or IP67, although rain or short-time soaking in 1M deep water cannot cause harmful effects.

However, once the valve well water is accumulated, the speed reducer is soaked in water for a long time, and parts inside the speed reducer are easily damaged, so that the valve cannot be opened or closed. Typically, the speed reducer installed in the valve well needs to be found, the manufacturer of the speed reducer customizes the IP 68-level speed reducer, the price of the customized IP 68-level speed reducer is greatly increased compared with the cost of the IP 67-level speed reducer, and the delivery period is longer.

Therefore, the existing IP 68-stage speed reducer for driving the valve switch has a complex structure, resulting in long manufacturing time and high cost, and the adopted parts have high machining precision, further increasing the cost.

Disclosure of Invention

The utility model aims to overcome the defects that the prior art has the defects that the structure of an IP 68-level speed reducer used for driving a valve switch is complex, the manufacturing time is long, the cost is high, the machining precision of the adopted parts is high, and the cost is further increased, and provides a shifting fork type driving mechanism which has a simple structure and is convenient to assemble.

The aim of the utility model can be achieved by the following technical scheme:

a shifting fork type driving mechanism comprises a bottom plate, a box cover, a driving shaft, a driving block, a sliding block, a shifting fork and a valve shaft, wherein the box cover is fixed above the bottom plate;

the driving shaft is rotatably fixed on the box cover, the driving shaft is in driving connection with the driving block, the sliding block is connected to the driving block, the driving block moves linearly along the driving shaft, the valve shaft is fixed on the shifting fork, a sliding groove and a clamping groove are formed in the shifting fork, the sliding block is in sliding connection with the sliding groove, and the clamping groove is in driving connection with the valve shaft.

Preferably, the part that drive shaft and drive piece are connected is the threaded rod, the lower extreme of drive piece is equipped with the screw hole with threaded rod matched with, the threaded hole is connected the threaded rod, the drive piece rotatable connection drive shaft.

Preferably, the threaded rod portion of the drive shaft is a T-shaped thread, and the threaded bore of the drive block is a corresponding T-shaped thread.

Preferably, the shifting fork is further provided with a fastening screw, one side of the clamping groove is provided with an opening, and the fastening screw is connected with two sides of the opening.

Preferably, the shape of the clamping groove corresponds to the shape of a valve shaft connecting end, and the valve shaft connecting end is a square head or a flat head and is used for driving and connecting the valve shaft by a shifting fork.

Preferably, one end of the valve shaft is connected with a pointer, the pointer is located above the box cover, one end of the pointer is a tip, and a scale is arranged in a region corresponding to the tip rotation range above the box cover.

Preferably, an initial limit bolt is arranged on the box cover, the initial limit bolt is adjustably fixed on one side of the box cover, and the lower end of the initial limit bolt is contacted with the upper end of the connecting shifting fork.

Preferably, a stop limit bolt is arranged on the case cover, the stop limit bolt is adjustably fixed on one side of the case cover, and the lower end of the stop limit bolt contacts with the lower end of the connecting shifting fork.

Preferably, the junction of bottom plate and case lid is equipped with first sealing washer, the junction of case lid and pointer is equipped with the second sealing washer, the junction of case lid and drive shaft is equipped with the third sealing washer, the junction of bottom plate and valve shaft is equipped with the fourth sealing washer.

Preferably, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all 0-shaped sealing rings.

Compared with the prior art, the utility model has the following advantages:

(1) According to the scheme, the driving mechanism drives the driving shaft to work, the driving block moves linearly along the driving shaft under the action of the driving shaft, the driving block drives the sliding block to slide in the sliding groove to drive the shifting fork to rotate, the clamping groove on the shifting fork drives the valve shaft to rotate, and the valve shaft drives the valve to act, so that the action control of opening and closing of the valve is realized. The device has the advantages of simple integral structure, convenient assembly and disassembly, short production time, improvement of the production efficiency of the device, low requirement on the precision of integral parts of the device, reduction of the process requirement and production cost and high economic benefit.

(2) In this scheme drive shaft rotates, drives the drive piece and removes, and the drive piece drives the slider and slides in the sliding tray, combines the shift fork to realize the rotation of valve shaft, and then the switching action of control valve, through simple lead screw slider structure, realizes the control to the switching action of valve, simple structure simple to operate. Meanwhile, the driving shaft and the driving block are connected through T-shaped threads, so that the connection strength is high, the overall manufacturability is good, the T-shaped threads are good in centering performance, and the driving block and the driving shaft are connected stably and are not easy to loosen.

(3) In this scheme, drive the valve shaft rotation at the shift fork, when adjusting valve opening and closing, can drive the pointer and rotate, along with the rotation of valve shaft, the pointed end of pointer indicates the corresponding position on the calibrated scale, can carry out real-time feedback to the degree of opening and closing of valve, makes things convenient for the staff to observe.

(4) According to the scheme, the starting limit bolt is arranged at the upper end of the shifting fork, the stop limit bolt is arranged at the lower end corresponding to the position, the moving area of the shifting fork is limited, the rotation angle of the valve shaft is controlled, the opening and closing degree of the valve is regulated, the valve is protected, the valve is prevented from being damaged due to overlarge rotation angle of the valve shaft, and the whole device is safer.

(5) This scheme is through all being equipped with the sealing washer that corresponds between case lid and bottom plate, case lid and pointer, case lid and drive shaft and bottom and valve shaft, guarantees the holistic leakproofness of actuating mechanism, and is sealed reliable, can reach the sealing grade of IP68 level, and applicable more abominable operational environment has improved the application scope and the practicality of device.

Drawings

FIG. 1 is a schematic diagram of a fork drive mechanism according to the present utility model;

FIG. 2 is a schematic view of the internal structure of the shift fork driving mechanism in a first state;

FIG. 3 is a left side cross-sectional schematic view of a fork drive mechanism provided by the present utility model;

FIG. 4 is a schematic structural view of a fork according to the present utility model;

FIG. 5 is a schematic view of the internal structure of the second state of the fork driving mechanism according to the present utility model;

in the figure: 1. the driving shaft, 2, the bracket, 3, the initial limit bolt, 4, the box cover, 5, the pointer, 6, the shifting fork, 7, the driving block, 8, the sliding block, 9, the valve shaft, 10, the flat key, 11, the bearing, 12, the third sealing ring, 13, the bottom plate, 14 and the final limit bolt.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Example 1

The embodiment provides a shifting fork type driving mechanism, which comprises a bottom plate 13, a box cover 4, a driving shaft 1, a driving block 7, a sliding block 8, a shifting fork 6 and a valve shaft 9, wherein the box cover 4 is fixed above the bottom plate 13;

the driving shaft 1 is rotatably fixed on the box body 4, the driving shaft 1 is in driving connection with the driving block 7, the sliding block 8 is fixed on the driving block 7, the driving block 7 moves linearly along the driving shaft 1, the valve shaft 9 is fixed on the shifting fork 6, the shifting fork 6 is provided with a sliding groove 61 and a clamping groove 62, the sliding block 8 is in sliding connection with the sliding groove 61, and the clamping groove 62 is in driving connection with the valve shaft 9.

Working principle: the driving shaft 1 drives the driving block 7 to work, the driving block 7 makes linear motion along the driving shaft 1 under the action of the driving shaft 1, the driving block 7 drives the sliding block 8 to slide in the sliding groove 61 in the process of linear motion to drive the shifting fork 6 to rotate, and then the clamping groove 62 on the shifting fork 6 drives the valve shaft 9 to rotate, and the valve shaft 9 drives the valve to act, so that the action control of opening and closing of the valve is realized.

According to the scheme, the driving block 7 is driven to work through the driving shaft 1, the driving block 7 moves linearly along the driving shaft 1 under the action of the driving shaft 1, the driving block 7 drives the sliding block 8 to slide in the sliding groove 61 in the process of linear movement, the shifting fork 6 is driven to rotate, the valve shaft 9 is driven to rotate through the clamping groove 62 on the shifting fork 6, and the valve shaft 9 drives the valve to act, so that the action control of opening and closing of the valve is realized. The device has the advantages of simple integral structure, convenient assembly and disassembly, short production time, improvement of the production efficiency of the device, low requirement on the precision of integral parts of the device, reduction of the process requirement and production cost and high economic benefit.

As a preferred embodiment, as shown in fig. 3, the connection part of the driving shaft 1 and the driving block 7 is a threaded rod, a threaded hole matched with the threaded rod is arranged at the lower end of the driving block 7, the threaded hole is connected with the threaded rod, and the driving block 7 is rotatably connected with the driving shaft 1.

The threaded rod portion of the drive shaft 1 is a T-shaped thread, and the threaded bore of the drive block 7 is a corresponding T-shaped thread.

In this scheme drive shaft 1 rotates, drives drive piece 7 and removes, and drive piece 7 makes rectilinear motion along drive shaft 1 under drive shaft 1's effect, and drive piece 7 is in rectilinear motion's in-process drive shift fork 6 action, realizes the rotation of valve shaft 9 through shift fork 6, and then the switching action of control valve, through simple lead screw slider structure, realizes the control to the valve switching action, simple structure simple to operate. Meanwhile, the driving shaft 1 and the driving block 7 are connected through T-shaped threads, so that the connection strength is high, the whole manufacturability is good, the T-shaped threads are good in centering performance, and the driving block 7 and the driving shaft 1 are connected stably and are not easy to loosen.

Specifically, as shown in fig. 4, a fastening screw 63 is further provided on the fork 6, an opening is provided on one side of the clamping groove 62, and the fastening screw 63 is connected to two sides of the opening. The shape of the clamping groove 62 corresponds to the shape of the connecting end of the valve shaft 9, and the connecting end of the valve shaft 9 is a square head or a flat head and is used for driving the shifting fork 6 to be connected with the valve shaft 9.

As a preferred embodiment, as shown in fig. 1, one end of the valve shaft 9 is connected with a pointer 5, the pointer 5 is located above the cover 4, one end of the pointer 5 is a tip 51, and a scale is arranged above the cover 4 in a region corresponding to the rotation range of the tip 51.

When the shifting fork 6 drives the valve shaft 9 to rotate and the valve is opened and closed, the pointer 5 is driven to rotate, and along with the rotation of the valve shaft 9, the tip 51 of the pointer 5 points to the corresponding position on the dial, so that the opening and closing degree of the valve can be fed back in real time, and the observation of staff is facilitated.

As a preferred embodiment, as shown in fig. 2 and 5, the box cover 4 is provided with an initial limit bolt 3, the initial limit bolt 3 is adjustably fixed on one side of the box cover 4, and the lower end of the initial limit bolt 3 contacts with the upper end of the connection shifting fork 6. The box cover 4 is provided with a stop limit bolt 14, the stop limit bolt 14 is adjustably fixed on one side of the box cover 4, and the lower end of the stop limit bolt 14 contacts the lower end of the connecting shifting fork 6.

This scheme is through setting up initial limit bolt 3 in the upper end of shift fork 6, and the lower extreme corresponds the position and sets up termination limit bolt 14, restricts the removal region of shift fork 6, and then the rotation angle of control valve shaft 9, and the degree of opening and closing of adjusting valve realizes protecting the valve, avoids the valve to lead to the condition of damage because of valve shaft rotation angle is too big, and the device is whole safer.

As a preferred embodiment, a first sealing ring is arranged at the joint of the bottom plate 13 and the box cover 4, a second sealing ring is arranged at the joint of the box cover 4 and the pointer 5, a third sealing ring 12 is arranged at the joint of the box cover 4 and the driving shaft 1, and a fourth sealing ring is arranged at the joint of the bottom plate 13 and the valve shaft 9. The first, second, third and fourth sealing rings are O-ring shaped.

This scheme is through all being equipped with the O shape sealing washer that corresponds between case lid 4 and bottom plate 13, case lid 4 and pointer 5, case lid 4 and drive shaft 1 and bottom 13 and valve shaft 9, guarantees the holistic leakproofness of actuating mechanism, and sealed reliable can reach the sealed grade of IP68 level, and applicable more abominable operational environment has improved the application scope and the practicality of device.

In combination with the above preferred embodiments, this embodiment provides an alternative embodiment, specifically:

a shifting fork type driving mechanism comprises a driving shaft 1, a bearing 11, a driving block 7, a sliding block 8, a shifting fork 6, a box cover 4, a bottom plate 13, a pointer 5, an O-shaped sealing ring 12, a limit bolt 3, a bracket 2 and other parts.

The driving mechanism drives the driving block 7 to linearly move through the T-shaped thread of the driving shaft 1, and the driving block 7 drives the sliding block 8 to slide in the track of the shifting fork 6 in the process of linear movement, so that the shifting fork is driven to move. The shifting fork 6 is connected with the valve shaft 9 through a flat head or a square head, and the shifting fork 6 acts as a valve switch.

The driving shaft 1 is a T-shaped thread, the thread strength is high, the manufacturability is good, the centering is good, and the loosening is not easy.

The shifting fork 6 is made of steel plates, and the steel plates have high strength and cannot deform under the stress; the shifting fork processing technology adopts linear cutting processing, and has low processing cost and high processing precision.

The shifting fork 6 is connected with the valve shaft 9 by adopting flat heads, square heads or keys, and the application range is wider in various connection modes.

The slider 8 is made of copper alloy, the copper alloy is high in strength, and friction force is small when the slider 8 slides in the shifting fork, so that transmission efficiency is high.

The driving mechanism is switched once, the sliding block 8 slides in the shifting fork 6 to and fro, the structure is compact, the outline dimension of the driving mechanism is greatly reduced, and the installation space is saved.

More specifically, the inner profile of the sliding groove 61 of the fork 6 includes a first straight line, a first curve, a second straight line, and a second curve connected in sequence, and the first curve and the second curve are curves protruding upward to the right; the outer contour of the sliding block 8 comprises a third straight line, a third curve, a fourth straight line and a fourth curve which are sequentially connected, wherein the third curve is matched with the radian of the first curve, and the fourth curve is matched with the radian of the second curve. And the valve shaft 9 is provided on the right side of the drive shaft 1.

The driving mechanism case cover 4 is provided with limit bolts at full-open and full-close positions, the switching allowance is larger than that of a common speed reducer, and the switching allowance is larger.

The driving mechanism bottom plate 13 is provided with a plurality of standard connecting flanges, can be connected with valves of various specifications, and has wider application range.

The electric operation and the manual operation are adopted, the bracket 2 is only required to be replaced between the manual operation and the electric operation, and the rest parts are completely universal.

The driving mechanism box cover is provided with an opening indicating cover (namely a pointer 5 and a dial), and the opening of the valve can be clearly seen in the opening and closing process of the driving mechanism.

O-shaped sealing rings are arranged between the driving mechanism box cover and the bottom plate, between the box cover and the pointer, between the box cover and the rotating shaft, and between the bottom cover and the valve shaft, and the sealing is reliable, can reach the IP68 level protection level, and can be suitable for any working condition demands.

The driving shaft is connected with an external driving mechanism through a flat key 10 to drive the whole equipment to work, the driving shaft 1 is arranged on the box cover 4 through a bearing 11, and the driving shaft 1 rotates to drive the driving block 7 to move up and down.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (10)

1. The shifting fork type driving mechanism is characterized by comprising a bottom plate (13), a box cover (4), a driving shaft (1), a driving block (7), a sliding block (8), a shifting fork (6) and a valve shaft (9), wherein the box cover (4) is fixed above the bottom plate (13);

the novel valve is characterized in that the driving shaft (1) is rotatably fixed on the box cover (4), the driving shaft (1) is in driving connection with the driving block (7), the sliding block (8) is connected to the driving block (7), the driving block (7) moves linearly along the driving shaft (1), the valve shaft (9) is fixed on the shifting fork (6), the shifting fork (6) is provided with the sliding groove (61) and the clamping groove (62), the sliding block (8) is in sliding connection with the sliding groove (61), and the clamping groove (62) is in driving connection with the valve shaft (9).

2. A fork-type driving mechanism according to claim 1, wherein the part of the driving shaft (1) connected with the driving block (7) is a threaded rod, a threaded hole matched with the threaded rod is arranged at the lower end of the driving block (7), the threaded hole is connected with the threaded rod, and the driving block (7) is rotatably connected with the driving shaft (1).

3. A fork-type driving mechanism according to claim 2, characterized in that the threaded shank portion of the driving shaft (1) is a T-shaped thread and the threaded bore of the driving block (7) is a corresponding T-shaped thread.

4. A shift fork driving mechanism according to claim 1, wherein the shift fork (6) is further provided with a fastening screw (63), one side of the clamping groove (62) is provided with an opening, and the fastening screw (63) is connected with two sides of the opening.

5. A fork-type driving mechanism according to claim 1, wherein the shape of the clamping groove (62) corresponds to the shape of the connecting end of the valve shaft (9), and the connecting end of the valve shaft (9) is a square or flat head for the fork (6) to drive the connecting valve shaft (9).

6. A fork-type driving mechanism according to claim 1, wherein one end of the valve shaft (9) is connected with a pointer (5), the pointer (5) is located above the case cover (4), one end of the pointer (5) is a tip (51), and a scale is arranged above the case cover (4) in a region corresponding to the rotation range of the tip (51).

7. A shift fork type driving mechanism according to claim 1, wherein the case cover (4) is provided with an initial limit bolt (3), the initial limit bolt (3) is adjustably fixed on one side of the case cover (4), and the lower end of the initial limit bolt (3) contacts with the upper end of the connecting shift fork (6).

8. A fork-type driving mechanism according to claim 1, wherein the cover (4) is provided with a stop limit bolt (14), the stop limit bolt (14) is adjustably fixed on one side of the cover (4), and the lower end of the stop limit bolt (14) contacts the lower end of the connecting fork (6).

9. A fork-type driving mechanism according to claim 1, characterized in that a first sealing ring is arranged at the joint of the bottom plate (13) and the box cover (4), a second sealing ring is arranged at the joint of the box cover (4) and the pointer (5), a third sealing ring (12) is arranged at the joint of the box cover (4) and the driving shaft (1), and a fourth sealing ring is arranged at the joint of the bottom plate (13) and the valve shaft (9).

10. A fork-type driving mechanism according to claim 9, wherein the first, second, third and fourth sealing rings are 0-shaped sealing rings.