CN210716197U

CN210716197U - Worm clearance adjusting structure of electric valve actuator

Info

Publication number: CN210716197U
Application number: CN201921366956.8U
Authority: CN
Inventors: 孙建龙; 孙小龙; 李柏和; 颜培泉; 谢荣
Original assignee: Guangzhou Feixier Electromechanical Equipment Co ltd
Current assignee: Guangzhou Feixier Electromechanical Equipment Co ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-06-09
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses an electric valve actuator worm clearance adjusting structure, which comprises an actuator shell, a worm, a first bearing, a second bearing, a movable plate, a fixed plate and a plurality of adjusting bolts, wherein the actuator shell is provided with a worm assembling cavity, a bearing mounting through hole is arranged at the lower end of the worm assembling cavity, the second bearing and the movable plate are respectively connected with the bearing mounting through hole in a sliding way, and the fixed plate is blocked at the outer side of the bearing mounting through hole; the second bearing and the movable plate are respectively provided with a shaft hole and a first through hole, the fixed plate is provided with a second through hole and a plurality of adjusting screw holes, the lower end of the worm sequentially penetrates through the shaft hole, the first through hole and the second through hole, and each adjusting bolt penetrates through each adjusting screw hole to be adjusted and abutted against the movable plate. According to the worm clearance adjusting structure of the electric valve actuator, the distance between the fixed plate and the movable plate is adjusted by the adjusting bolt, and the movable plate is further abutted against the second bearing, so that the worm is prevented from generating axial tolerance with the bearing in the operation process, and the using effect is improved.

Description

Worm clearance adjusting structure of electric valve actuator

Technical Field

The utility model relates to an electric valve executor field especially relates to an electric valve executor worm clearance adjustment structure.

Background

An electric valve actuator is an essential important component of an automatic control system. It is used to receive the control signal from the controller and change the size of the controlled medium to maintain the controlled variable at the required value or in certain range. The electric valve actuator usually performs specific actions of the actuator by matching a motor with a worm and a worm wheel, and the assembly height of the worm is not uniform due to nonstandard and non-uniform height of the teeth of the pot gear during assembly of the worm.

In the prior art, a speed reduction device of an intelligent valve actuator is disclosed in chinese patent application No. 201811629614.0, in which a worm gear mechanism includes a worm, a worm gear ring, a front bearing pressing cap and a rear bearing pressing cap, the worm gear ring is rotatably mounted on a box body, the worm mounted on the box body is engaged with a third external tooth of the worm gear ring, the front bearing pressing cap and the rear bearing pressing cap are hermetically mounted on the box body, and the worm extends out of the front bearing pressing cap. The worm of the electric valve actuator extends out of the front bearing pressing cap to be connected with the hand wheel, but the worm is not fastened with the front bearing, if the worm in the electric valve actuator is not fastened with the bearing, axial tolerance of the worm bearing in the operation process can be caused in long-term use, and the use effect is influenced.

Disclosure of Invention

An object of the utility model is to provide an electric valve executor worm clearance adjustment structure, this electric valve executor worm clearance adjustment structure utilize adjusting bolt to adjust the distance between fixed plate and the fly leaf to further support tight second bearing through the fly leaf, avoided the worm to produce axial tolerance with the bearing at the operation in-process, improve the result of use.

The technical scheme is as follows:

the worm clearance adjusting structure of the electric valve actuator comprises an actuator shell, a worm, a first bearing, a second bearing, a movable plate, a fixed plate and a plurality of adjusting bolts, wherein a worm assembling cavity is formed in the actuator shell, a bearing mounting through hole is formed in the lower end of the worm assembling cavity, the first bearing is mounted at the upper end of the worm assembling cavity, the second bearing and the movable plate are respectively connected with the bearing mounting through hole in a sliding mode, and the fixed plate is blocked at the outer side of the bearing mounting through hole; the second bearing and the movable plate are respectively provided with a shaft hole and a first through hole, the fixed plate is provided with a second through hole and a plurality of adjusting screw holes, the adjusting screw holes are respectively located on the periphery of the second through hole and are matched with the adjusting bolts, the upper end of the worm is rotatably connected with the first bearing, the lower end of the worm sequentially penetrates through the shaft hole, the first through hole and the second through hole and is rotatably connected with the second bearing, and each adjusting bolt penetrates through each adjusting screw hole and is adjusted to be tightly connected with the movable plate.

The plurality of adjusting screw holes at least comprise first adjusting screw holes and second adjusting screw holes, the first adjusting screw holes and the second adjusting screw holes are respectively located on two opposite sides of the second through holes, the plurality of adjusting screw holes at least comprise first adjusting bolts and second adjusting bolts, and the first adjusting bolts and the second adjusting bolts respectively penetrate through the first adjusting screw holes and the second adjusting screw holes to be connected with the movable plate in an adjusting and abutting mode.

It is a plurality of adjust the screw include first regulation screw, second regulation screw, third regulation screw, fourth regulation screw, first regulation screw, second regulation screw, third regulation screw, fourth regulation screw evenly distributed are in the periphery of second through-hole, it is a plurality of adjusting bolt includes first adjusting bolt, second adjusting bolt, third adjusting bolt, fourth adjusting bolt, first adjusting bolt, second adjusting bolt, third adjusting bolt, fourth adjusting bolt pass respectively first regulation screw, second regulation screw, third adjusting bolt, fourth adjusting bolt with the fly leaf is adjusted and is supported tight connection.

The bearing mounting through hole is a circular through hole, the second bearing and the movable plate are respectively annular, and the second bearing and the movable plate are respectively in matched sliding connection with the bearing mounting through hole.

The fixing plate is plugged outside the bearing mounting through hole through the fixing screw.

The fixing device is characterized in that the number of the fixing screws is four, the fixing plate is square, four fixing through holes are further formed in the fixing plate and are respectively located at four corners of the fixing plate, four fixing screw holes are formed in the outer side face of the actuator shell and are respectively located on the periphery of the outer side of the bearing installation through hole, the fixing screw holes are matched with the fixing screws, and each fixing screw penetrates through each fixing through hole and is in threaded connection with each fixing screw hole.

The worm comprises a worm wheel driving section and a gear transmission section, the worm wheel driving section is larger than the gear transmission section, the lower end of the worm wheel driving section is connected with the upper end of the gear transmission section and forms a positioning step, the worm sequentially penetrates through the shaft hole, the first through hole and the second through hole through the gear transmission section, the positioning step is close to the upper end of the second bearing, and the movable plate is adjusted to be tightly abutted to the lower end of the second bearing through the adjusting bolt.

The worm gear driving section is provided with spiral teeth, and the spiral teeth are meshed with the worm gear.

The worm further comprises a speed change gear set, the worm further comprises a driven gear, and the lower end of the gear transmission section is in meshed connection with the speed change gear set through the driven gear.

It should be noted that:

the foregoing references to "first and second …" do not denote any particular quantity or order, but rather are used to distinguish one name from another.

In the description of the present invention, it should be understood that the terms "upper" and "lower" are used as the terms of the orientation or the positional relationship based on the drawings, or the orientation or the positional relationship that the product of the present invention is usually placed when using, or the orientation or the positional relationship that the person skilled in the art usually understands, only for the convenience of describing the present invention and simplifying the description, but not for the indication or the suggestion that the device or the element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be interpreted as the limitation of the present invention.

The advantages or principles of the invention are explained below:

1. the worm clearance adjusting structure of the electric valve actuator comprises an actuator shell, a worm, a first bearing, a second bearing, a movable plate, a fixed plate and a plurality of adjusting bolts, wherein during assembly, the first bearing is installed at the upper end of a worm assembling cavity, the upper end of the worm is rotationally connected with the first bearing, then the second bearing, the movable plate and the fixed plate are sequentially sleeved on the lower end of the worm, the second bearing and the movable plate are sequentially installed in a bearing installing through hole, the fixed plate is blocked at the outer side of the bearing installing through hole, the adjusting bolts penetrate through adjusting screw holes to abut against the movable plate, and then the movable plate abuts against the second bearing; according to the worm clearance adjusting structure of the electric valve actuator, the distance between the fixed plate and the movable plate is adjusted by the adjusting bolt, and the movable plate is further abutted against the second bearing, so that the worm is prevented from generating axial tolerance with the bearing in the operation process, and the using effect is improved.

2. A plurality of regulation screw include first regulation screw, second regulation screw at least, and two regulation screws are located the double-phase contralateral of second through-hole respectively, make adjusting bolt realize the balance adjustment to the fly leaf, improve stability.

3. In another embodiment, the plurality of adjusting screw holes include a first adjusting screw hole, a second adjusting screw hole, a third adjusting screw hole and a fourth adjusting screw hole, four adjusting screw holes are formed around the second through hole, and the movable plate is adjusted by four adjusting bolts, so that the adjustment of the movable plate is more balanced and stable.

4. Preferably, the bearing mounting through hole is a circular through hole, the second bearing and the movable plate are respectively annular, and the annular second bearing and the annular movable plate are matched with the circular through hole to slide, so that the second bearing and the movable plate are more convenient to adjust.

5. The fixed plate is plugged outside the bearing mounting through hole through the fixing screw, the screw is convenient to take, the assembly is simple, and the cost is saved.

6. Preferably, four fixing screws are selected to fixedly mount the fixing plate, so that the mounting of the fixing plate is more stable.

7. The lower end of the worm wheel driving section and the upper end of the gear transmission section form a positioning step, the worm is matched with the movable plate to abut against the second bearing by utilizing the positioning step, the axial tolerance between the worm and the bearing inner sleeve is avoided, and the using effect is improved.

8. The worm wheel driving section is provided with the spiral teeth, so that the worm wheel can be conveniently driven to rotate.

9. The speed change gear set drives the worm to rotate through the driven gear, and the driving efficiency of the speed change gear set is improved.

Drawings

Fig. 1 is a sectional view of the worm clearance adjusting structure of the electric valve actuator according to the embodiment of the present invention.

Fig. 2 is a schematic plan view of a worm clearance adjusting structure fixing plate of the electric valve actuator of the embodiment of the present invention.

Fig. 3 is a schematic plan view of a movable plate of a worm clearance adjusting structure of an electric valve actuator according to an embodiment of the present invention.

Fig. 4 is a schematic plan view of a second bearing of the worm clearance adjusting structure of the electric valve actuator according to the embodiment of the present invention.

Description of reference numerals:

10. the actuator comprises an actuator shell, 11, a worm assembly cavity, 12, a bearing installation through hole, 20, a worm, 21, a worm wheel driving section, 211, a spiral tooth, 22, a gear transmission section, 23, a driven gear, 30, a first bearing, 40, a second bearing, 41, a shaft hole, 50, a movable plate, 51, a first through hole, 60, a fixing plate, 61, a second through hole, 62, an adjusting screw hole, 63, a fixing through hole, 71, an adjusting bolt, 72, a fixing screw, 80, a worm wheel, 90 and a speed change gear set.

Detailed Description

The following describes embodiments of the present invention in detail.

As shown in fig. 1 to 4, the worm clearance adjusting structure of the electric valve actuator comprises an actuator housing 10, a worm 20, a first bearing 30, a second bearing 40, a movable plate 50, a fixed plate 60 and a plurality of adjusting bolts 71, wherein a worm assembly accommodating cavity 11 is formed inside the actuator housing 10, a bearing mounting through hole 12 is formed at the lower end of the worm assembly accommodating cavity 11, the first bearing 30 is mounted at the upper end of the worm assembly accommodating cavity 11, the second bearing 40 and the movable plate 50 are respectively connected with the bearing mounting through hole 12 in a sliding manner, and the fixed plate 60 is blocked outside the bearing mounting through hole 12; the second bearing 40 and the movable plate 50 are respectively provided with a shaft hole 41 and a first through hole 51, the fixed plate 60 is provided with a second through hole 61 and a plurality of adjusting screw holes 62, the plurality of adjusting screw holes 62 are respectively positioned at the periphery of the second through hole 61 and are matched with a plurality of adjusting bolts 71, the upper end of the worm is rotatably connected with the first bearing 30, the lower end of the worm sequentially penetrates through the shaft hole 41, the first through hole 51 and the second through hole 61 and is rotatably connected with the second bearing 40, and each adjusting bolt 71 penetrates through each adjusting screw hole 62 to be in adjusting abutting connection with the movable plate 50.

During assembly, the first bearing 30 is firstly installed at the upper end of the worm assembly accommodating cavity 11, then the upper end of the worm 20 is rotatably connected with the first bearing 30, then the second bearing 40, the movable plate 50 and the fixed plate 60 are sequentially sleeved on the lower end of the worm 20, the second bearing 40 and the movable plate 50 are sequentially installed in the bearing installation through hole 12, the fixed plate 60 is blocked at the outer side of the bearing installation through hole 12, then the adjusting bolt 71 penetrates through the adjusting screw hole 62 to abut against the movable plate 50, and then the movable plate 50 abuts against the second bearing 40; the worm clearance adjusting structure of the electric valve actuator utilizes the adjusting bolt 71 to adjust the distance between the fixed plate 60 and the movable plate 50, and further supports against the second bearing 40 through the movable plate 50, so that the worm 20 is prevented from generating axial tolerance with the bearing in the operation process, and the use effect is improved.

Wherein, a plurality of adjusting screw holes 62 include first adjusting screw hole, second adjusting screw hole at least, and first adjusting screw hole, second adjusting screw hole are located the double-phase contralateral side of second through-hole 61 respectively, and a plurality of adjusting bolt 71 include first adjusting bolt, second adjusting bolt at least, and first adjusting bolt, second adjusting bolt pass first adjusting screw hole, second adjusting screw hole respectively and adjust to support tightly to be connected with fly leaf 50. The two adjusting screw holes 62 are respectively located on two opposite sides of the second through hole 61, so that the adjusting bolt 71 realizes balance adjustment of the movable plate 50, and stability is improved.

In another embodiment, the plurality of adjusting screw holes 62 include a first adjusting screw hole, a second adjusting screw hole, a third adjusting screw hole, and a fourth adjusting screw hole, the first adjusting screw hole, the second adjusting screw hole, the third adjusting screw hole, and the fourth adjusting screw hole are uniformly distributed around the second through hole 61, the plurality of adjusting bolts 71 include a first adjusting bolt, a second adjusting bolt, a third adjusting bolt, and a fourth adjusting bolt, the first adjusting bolt, the second adjusting bolt, the third adjusting bolt, and the fourth adjusting bolt respectively pass through the first adjusting screw hole, the second adjusting screw hole, the third adjusting screw hole, and the fourth adjusting screw hole to be connected with the movable plate 50 in an adjusting and abutting manner. Four adjusting screw holes 62 are formed around the second through hole 61, and the movable plate 50 is adjusted by four adjusting bolts 71, so that the adjustment of the movable plate 50 is more balanced and stable.

Preferably, the bearing mounting through hole 12 is a circular through hole, the second bearing 40 and the movable plate 50 are respectively annular, and the annular second bearing 40 and the annular movable plate 50 are respectively in matching sliding connection with the bearing mounting through hole 12. The annular second bearing 40 and the movable plate 50 slide in cooperation with the circular through hole, so that the adjustment of the second bearing 40 and the movable plate 50 is more convenient.

The worm 20 comprises a worm wheel driving section 21 and a gear transmission section 22, the worm wheel driving section 21 is larger than the gear transmission section 22, the lower end of the worm wheel driving section 21 is connected with the upper end of the gear transmission section 22, a positioning step is formed, the worm 20 sequentially penetrates through the shaft hole 41, the first through hole 51 and the second through hole 61 through the gear transmission section 22, the positioning step is close to the upper end of the second bearing 40, and the movable plate 50 is adjusted to be tightly abutted to the lower end of the second bearing 40 through the adjusting bolt 71. The lower end of the worm wheel driving section 21 and the upper end of the gear transmission section 22 form a positioning step, the worm 20 is matched with the movable plate 50 to tightly abut against the second bearing 40 by utilizing the positioning step, so that the worm 20 and a bearing inner sleeve are prevented from generating axial tolerance, and the using effect is improved.

The worm clearance adjusting structure of the electric valve actuator further comprises a fixing screw 72, a worm wheel 80 and a speed change gear set 90, wherein the fixing plate 60 is plugged outside the bearing mounting through hole 12 through the fixing screw 72. The screw is convenient to take materials, the assembly is simple, and the cost is saved.

Preferably, the number of the fixing screws 72 is four, the fixing plate 60 is square, the fixing plate 60 is further provided with four fixing through holes 63, the four fixing through holes 63 are respectively located at four corners of the fixing plate 60, the outer side surface of the actuator housing 10 is provided with four fixing screw holes, the four fixing screw holes are respectively located on the periphery of the outer side of the bearing installation through hole 12, the fixing screw holes are matched with the fixing screws 72, and each fixing screw 72 penetrates through each fixing through hole 63 to be in threaded connection with each fixing screw hole. Four fixing screws 72 are selected to fix the fixing plate 60, so that the fixing plate 60 is more stably installed.

The worm drive section 21 has helical teeth 211, and the helical teeth 211 are in meshing engagement with the worm wheel 80. The worm wheel driving section 21 is provided with a spiral tooth 211 to facilitate the rotation of the worm wheel 80.

The worm 20 further comprises a driven gear 23, and the lower end of the gear transmission section 22 is in meshed connection with the speed change gear set 90 through the driven gear 23. The speed change gear set 90 drives the worm 20 to rotate through the driven gear 23, and the driving efficiency of the speed change gear set 90 is improved.

The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereby; any replacement and improvement made on the basis of not violating the conception of the utility model belong to the protection scope of the utility model.

Claims

1. The worm clearance adjusting structure of the electric valve actuator is characterized by comprising an actuator shell, a worm, a first bearing, a second bearing, a movable plate, a fixed plate and a plurality of adjusting bolts, wherein a worm assembling cavity is formed in the actuator shell, a bearing mounting through hole is formed in the lower end of the worm assembling cavity, the first bearing is mounted at the upper end of the worm assembling cavity, the second bearing and the movable plate are respectively connected with the bearing mounting through hole in a sliding mode, and the fixed plate is blocked at the outer side of the bearing mounting through hole; the second bearing and the movable plate are respectively provided with a shaft hole and a first through hole, the fixed plate is provided with a second through hole and a plurality of adjusting screw holes, the adjusting screw holes are respectively located on the periphery of the second through hole and are matched with the adjusting bolts, the upper end of the worm is rotatably connected with the first bearing, the lower end of the worm sequentially penetrates through the shaft hole, the first through hole and the second through hole and is rotatably connected with the second bearing, and each adjusting bolt penetrates through each adjusting screw hole and is adjusted to be tightly connected with the movable plate.

2. The electric valve actuator worm clearance adjusting structure of claim 1, wherein the plurality of adjusting screw holes comprise at least a first adjusting screw hole and a second adjusting screw hole, the first adjusting screw hole and the second adjusting screw hole are respectively located on two opposite sides of the second through hole, the plurality of adjusting bolts comprise at least a first adjusting bolt and a second adjusting bolt, and the first adjusting bolt and the second adjusting bolt respectively penetrate through the first adjusting screw hole and the second adjusting screw hole to be in adjusting abutting connection with the movable plate.

3. The electric valve actuator worm clearance adjusting structure of claim 1, wherein the plurality of adjusting screw holes comprise a first adjusting screw hole, a second adjusting screw hole, a third adjusting screw hole, and a fourth adjusting screw hole, the first adjusting screw hole, the second adjusting screw hole, the third adjusting screw hole, and the fourth adjusting screw hole are uniformly distributed around the second through hole, the plurality of adjusting bolts comprise a first adjusting bolt, a second adjusting bolt, a third adjusting bolt, and a fourth adjusting bolt, and the first adjusting bolt, the second adjusting screw hole, the third adjusting bolt, and the fourth adjusting bolt respectively pass through the first adjusting screw hole, the second adjusting screw hole, the third adjusting screw hole, and the fourth adjusting screw hole to be adjusted and abutted against the movable plate.

4. The electric valve actuator worm clearance adjustment structure of claim 1, wherein the bearing mounting through hole is a circular through hole, the second bearing and the movable plate are respectively annular, and the annular second bearing and the annular movable plate are respectively matched and slidably connected with the bearing mounting through hole.

5. An electrically operated valve actuator worm lash adjustment arrangement as claimed in any one of claims 1 to 4 further including a fixing screw by which said fixing plate is blocked outside said bearing mounting through hole.

6. The electric valve actuator worm clearance adjusting structure as claimed in claim 5, wherein said four fixing screws are provided, said fixing plate is square, said fixing plate is further provided with four fixing through holes, said four fixing through holes are respectively provided at four corners of said fixing plate, said actuator housing is provided at an outer side surface thereof with four fixing screw holes, said four fixing screw holes are respectively provided at a periphery of an outer side of said bearing mounting through hole, said fixing screw holes are matched with said fixing screws, and each of said fixing screws passes through each of said fixing through holes to be screw-coupled with each of said fixing screw holes.

7. An electric valve actuator worm clearance adjusting structure as set forth in any one of claims 1 to 4, characterized in that the worm comprises a worm wheel driving section and a gear transmission section, the worm wheel driving section is larger than the gear transmission section, the lower end of the worm wheel driving section is connected with the upper end of the gear transmission section and forms a positioning step, the worm passes through the gear transmission section in sequence through the shaft hole, the first through hole and the second through hole, the positioning step is close to the upper end of the second bearing, and the movable plate is adjusted to be close to the lower end of the second bearing by the adjusting bolt.

8. The electric valve actuator worm lash adjustment structure of claim 7 further comprising a worm gear, wherein said worm gear drive section has helical teeth, and wherein said helical teeth are in meshing engagement with said worm gear.

9. The electric valve actuator worm lash adjustment structure of claim 7 further comprising a speed change gear set, wherein said worm further comprises a driven gear, and wherein a lower end of said gear drive section is in meshing engagement with said speed change gear set through said driven gear.