CN210687196U

CN210687196U - Fastening structure of worm bearing of electric valve actuator

Info

Publication number: CN210687196U
Application number: CN201921366117.6U
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: 2020-06-05
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses an electrically operated valve executor worm bearing's fastening structure, including the executor shell, the worm, first bearing, the second bearing, speed gearset, the latch segment, the inside of executor shell includes that the worm assembly holds the chamber, the chamber is held in the variable speed assembly, the chamber intercommunication is held with the variable speed assembly to the lower extreme that the chamber was held in the worm assembly, the upper end in worm assembly appearance chamber is installed to the first bearing, the UNICOM juncture in worm assembly appearance chamber and variable speed assembly appearance chamber is installed to the second bearing, the bearing endotheca is drawn together to the second bearing, the upper end and the first bearing swivelling joint of worm, the lower extreme of worm passes the bearing endotheca in proper order, the latch segment is held the chamber and is extended toward the variable speed assembly, and be connected with the speed gearset meshing of installing in the chamber. The fastening structure utilizes the locking block to lock the worm and the second bearing, avoids the axial tolerance between the worm and the bearing in the operation process, and improves the use effect.

Description

Fastening structure of worm bearing of electric valve actuator

Technical Field

The utility model relates to an electric valve executor field especially relates to an electric valve executor worm bearing's fastening 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.

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 bearing's fastening structure, this fastening structure utilize the latch segment with worm and second bearing locking, 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 fastening structure of the worm bearing of the electric valve actuator comprises an actuator shell, a worm, a first bearing, a second bearing, a speed change gear set and a locking block, the interior of the actuator shell comprises a worm assembly cavity and a variable speed assembly cavity, the lower end of the worm assembly cavity is communicated with the variable speed assembly cavity, the first bearing is arranged at the upper end of the worm assembling cavity, the second bearing is arranged at the communicated junction of the worm assembling cavity and the variable speed assembling cavity, the second bearing comprises a bearing inner sleeve, the upper end of the worm is rotationally connected with the first bearing, the lower end of the worm sequentially passes through the bearing inner sleeve and the locking block and extends to the variable speed assembly cavity, and the worm is in meshed connection with a speed change gear set arranged in the speed change assembly cavity, and the worm is in locked connection with the bearing inner sleeve through the locking block.

The worm assembly cavity and the variable speed assembly cavity are communicated with each other through the first screw and the second screw, the second bearing is arranged at a junction of the worm assembly cavity and the variable speed assembly cavity through the first screw and the second screw, and the first screw and the second screw are respectively positioned on two opposite sides of the second bearing.

The second bearing further comprises a bearing outer sleeve, and the first screw and the second screw are respectively close to and tightly lock the two opposite outer sides of the bearing outer sleeve.

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, a positioning step is formed, the worm sequentially penetrates through the bearing inner sleeve and the locking block through the gear transmission section and extends towards the variable speed assembly cavity, the positioning step is close to the upper end of the bearing inner sleeve, and the locking block is locked close to the lower end of the bearing inner sleeve.

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.

The locking block is a nut, an external thread is arranged at the position, close to the lower end of the bearing inner sleeve, of the gear transmission section, the nut is in threaded connection with the external thread in a matched mode, and the nut is locked to be close to the lower end of the bearing inner sleeve.

The worm gear is characterized by further comprising a worm gear, wherein spiral teeth are arranged on the circumferential side face of the worm gear driving section of the worm, and the spiral teeth are meshed with the worm gear.

The actuator shell is characterized by further comprising a driving motor, the actuator shell further comprises a motor containing cavity, the motor containing cavity is communicated with the variable speed assembly containing cavity, and the driving motor is installed in the motor containing cavity and extends into the variable speed assembly containing cavity to be in driving connection with the variable speed gear set.

The driving motor is provided with a driving gear, and the driving motor extends to the variable speed assembly cavity through the driving gear and is meshed and connected with the variable speed gear set.

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 is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1 of the accompanying drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The advantages or principles of the invention are explained below:

1. this electric valve executor worm bearing's fastening structure includes the executor shell, the worm, first bearing, the second bearing, change gear set, the latch segment, the both ends of worm respectively with first bearing, second bearing swivelling joint, the lower extreme of worm passes through latch segment and second bearing locking connection, the upper end of worm is supported in the upper end that the chamber was held in the worm assembly through first bearing swivelling joint, make the assembly of worm more fasten, avoided the worm to produce axial tolerance with the bearing at the operation in-process, improve the result of use.

2. The second bearing is installed in the boundary of worm assembly appearance chamber and variable speed assembly appearance chamber through first screw, second screw, and the second bearing passes through the circumferential position of first screw, second screw injecing the second bearing, avoids the second bearing lateral displacement to appear in the operation process, improves the stability of worm operation.

3. The first screw and the second screw are respectively close to two opposite sides of the outer sleeve of the locking bearing, so that the second bearing is more stable and safer.

4. 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 locked with the bearing inner sleeve by matching the positioning step with the locking block, and the bearing inner sleeve rotates along with the worm when the worm rotates, so that the worm and the bearing inner sleeve are prevented from generating axial tolerance, and the using effect is improved.

5. The worm is connected with the speed change gear set in a meshed mode through the driven gear, and transmission efficiency of the worm is improved.

6. Preferably, the locking block adopts a nut, and the nut is matched and locked with the external thread of the gear transmission section, so that the assembly of the worm is facilitated, and the locking block is more convenient to fasten.

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

8. The driving motor is arranged to provide driving power for the rotation of the worm.

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

Drawings

Fig. 1 is a sectional view of a fastening structure of a worm bearing of an electric valve actuator according to an embodiment of the present invention.

Fig. 2 is a bottom view at the second bearing of fig. 1.

Fig. 3 is a partially enlarged view of the worm and worm wheel of fig. 1.

Description of reference numerals:

10. actuator shell, 11, worm assembly cavity, 12, variable speed assembly cavity, 13, motor cavity, 20, worm, 21, worm wheel driving section, 211, spiral tooth, 22, gear transmission section, 221, external thread, 23, driven gear, 30, first bearing, 40, second bearing, 41, bearing inner sleeve, 42, bearing outer sleeve, 50, variable speed gear set, 60, locking block, 71, first screw, 72, second screw, 80, worm wheel, 90, driving motor, 91 and driving gear.

Detailed Description

The following describes embodiments of the present invention in detail.

As shown in fig. 1 to 3, the fastening structure of the worm bearing of the electric valve actuator comprises an actuator housing 10, a worm 20, a first bearing 30, a second bearing 40, a speed change gear set 50 and a locking block 60, wherein the actuator housing 10 includes a worm assembly cavity 11 and a speed change assembly cavity 12, the lower end of the worm assembly cavity 11 is communicated with the speed change assembly cavity 12, the first bearing 30 is installed at the upper end of the worm assembly cavity 11, the second bearing 40 is installed at the junction of the worm assembly cavity 11 and the speed change assembly cavity 12, the second bearing 40 includes a bearing inner sleeve 41, the upper end of the worm is rotatably connected with the first bearing 30, the lower end of the worm sequentially passes through the bearing inner sleeve 41 and the locking block 60 and extends towards the speed change assembly cavity 12, and is engaged with a speed change gear set 50 installed in the speed change assembly cavity 12, and the worm is locked and connected with the bearing inner sleeve 41 through a locking block 60.

Two ends of the worm 20 are respectively and rotatably connected with the first bearing 30 and the second bearing 40, the lower end of the worm 20 is in locking connection with the second bearing 40 through the locking block 60, and the upper end of the worm 20 is rotatably supported at the upper end of the worm assembling cavity 11 through the first bearing 30, so that the assembly of the worm 20 is firmer, the axial tolerance between the worm 20 and the bearings in the operation process is avoided, and the use effect is improved.

The fastening structure of the worm bearing of the electric valve actuator further comprises a first screw 71 and a second screw 72, the second bearing 40 is installed at the communicated junction of the worm assembly accommodating cavity 11 and the variable speed assembly accommodating cavity 12 through the first screw 71 and the second screw 72, and the first screw 71 and the second screw 72 are respectively located on two opposite sides of the second bearing 40. The second bearing 40 limits the circumferential position of the second bearing 40 through the first screw 71 and the second screw 72, so that the second bearing 40 is prevented from generating lateral displacement in the operation process, and the operation stability of the worm 20 is improved.

Preferably, the second bearing 40 further includes a bearing outer sleeve 42, and the first screw 71 and the second screw 72 respectively close to opposite outer sides of the bearing outer sleeve 42. The second bearing 40 is more stable and safe.

The worm 20 comprises a worm wheel driving section 21, a gear transmission section 22 and a driven gear 23, wherein 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 to form a positioning step, the worm 20 sequentially penetrates through the bearing inner sleeve 41 and the locking block 60 through the gear transmission section 22 and extends towards the variable-speed assembly cavity 12, the positioning step is close to the upper end of the bearing inner sleeve 41, and the locking block 60 is locked and close to the lower end of the bearing inner sleeve 41. 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 locking block 60 through the positioning step to be locked with the bearing inner sleeve 41, when the worm 20 rotates, the bearing inner sleeve 41 rotates along with the worm 20, axial tolerance between the worm 20 and the bearing inner sleeve 41 is avoided, and the using effect is improved.

The lower end of the gear transmission section 22 is in meshed connection with the speed change gear set 50 through the driven gear 23. The transmission efficiency of the worm 20 is improved.

Preferably, the locking block 60 is a nut, the gear transmission section 22 is provided with an external thread 221 near the lower end of the bearing inner sleeve 41, the nut is in threaded connection with the external thread 221, and the nut is locked near the lower end of the bearing inner sleeve 41. The locking block 60 is a nut, and is matched and locked with the external thread 221 of the gear transmission section 22 through the nut, so that the assembly of the worm 20 is facilitated, and the locking block 60 is more convenient to fasten.

In another embodiment, the fastening structure of the worm bearing of the electric valve actuator further comprises a worm wheel 80 and a driving motor 90, wherein the circumferential side surface of the worm wheel driving section 21 of the worm 20 is provided with spiral teeth 211, and the spiral teeth 211 are meshed with the worm wheel 80. It is convenient to drive the worm gear 80 to rotate.

The actuator shell 10 further includes a motor cavity 13 inside, the motor cavity 13 is communicated with the variable speed assembly cavity 12, and the driving motor 90 is installed in the motor cavity 13 and extends into the variable speed assembly cavity 12 to be in driving connection with the variable speed gear set 50. The drive motor 90 is provided to provide drive power for rotation of the worm 20.

Preferably, the driving motor 90 has a driving gear 91, and the driving motor 90 extends to the transmission assembly cavity 12 through the driving gear 91 to be meshed with the transmission gear set 50. The driving motor 90 drives the transmission gear set 50 to rotate through the driving gear 91, thereby improving the driving efficiency of the transmission gear set 50.

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 fastening structure of the worm bearing of the electric valve actuator is characterized by comprising an actuator shell, a worm, a first bearing, a second bearing, a speed change gear set and a locking block, the interior of the actuator shell comprises a worm assembly cavity and a variable speed assembly cavity, the lower end of the worm assembly cavity is communicated with the variable speed assembly cavity, the first bearing is arranged at the upper end of the worm assembling cavity, the second bearing is arranged at the communicated junction of the worm assembling cavity and the variable speed assembling cavity, the second bearing comprises a bearing inner sleeve, the upper end of the worm is rotationally connected with the first bearing, the lower end of the worm sequentially passes through the bearing inner sleeve and the locking block and extends to the variable speed assembly cavity, and the worm is in meshed connection with a speed change gear set arranged in the speed change assembly cavity, and the worm is in locked connection with the bearing inner sleeve through the locking block.

2. The electric valve actuator worm bearing fastening structure as claimed in claim 1, further comprising a first screw and a second screw, wherein the second bearing is installed at a junction where the worm assembly cavity communicates with the variable speed assembly cavity through the first screw and the second screw, and the first screw and the second screw are respectively located at two opposite sides of the second bearing.

3. The electric valve actuator worm bearing fastener arrangement of claim 2, wherein the second bearing further comprises a bearing housing, and wherein the first and second screws are tightened against opposite outer sides of the bearing housing, respectively.

4. The electric valve actuator worm bearing fastening structure as claimed in any one of claims 1 to 3, wherein 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 to form a positioning step, the worm sequentially passes through the bearing inner sleeve and the locking block through the gear transmission section and extends to the speed change assembly cavity, the positioning step is close to the upper end of the bearing inner sleeve, and the locking block is locked close to the lower end of the bearing inner sleeve.

5. The electrically operated valve actuator worm bearing fastening arrangement as recited in claim 4, wherein the worm further comprises a driven gear, and wherein the lower end of the geared section is in meshing engagement with the speed change gear set via the driven gear.

6. The electric valve actuator worm bearing fastening arrangement as recited in claim 4, wherein the locking block is a nut, the gear drive section has external threads near the lower end of the inner bearing housing, the nut is in threaded engagement with the external threads, and the nut is locked against the lower end of the inner bearing housing.

7. The electric valve actuator worm bearing fastening structure as claimed in claim 4, further comprising a worm wheel, wherein the worm wheel driving section of the worm has spiral teeth on a circumferential side thereof, and the spiral teeth are engaged with the worm wheel.

8. The fastening structure of a worm bearing of an electric valve actuator according to any one of claims 1 to 3, further comprising a driving motor, wherein the actuator housing further comprises a motor accommodating cavity therein, the motor accommodating cavity is communicated with the variable speed assembly accommodating cavity, and the driving motor is installed in the motor accommodating cavity and extends into the variable speed assembly accommodating cavity to be in driving connection with the variable speed gear set.

9. The electric valve actuator worm bearing fastening arrangement as recited in claim 8, wherein the drive motor has a drive gear, and wherein the drive motor is engaged with the speed change gear set by extending through the drive gear to a speed change assembly cavity.