CN219327835U

CN219327835U - Gear transmission box

Info

Publication number: CN219327835U
Application number: CN202320193376.3U
Authority: CN
Inventors: 杨建华; 任坤; 董昕; 胡云忠
Original assignee: Sichuan Jiacheng Valve Machinery Co ltd
Current assignee: Sichuan Jiacheng Valve Machinery Co ltd
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-07-11
Anticipated expiration: 2033-02-09

Abstract

The utility model discloses a gear transmission case which comprises a shell, a transmission shaft, a driving gear, a driven gear and a valve rod nut, wherein the transmission shaft transversely penetrates through the shell, the inner end of the transmission shaft is in linkage connection with the driving gear, the valve rod nut is vertically rotatably arranged in the shell, a limit flange is arranged on the periphery of the valve rod nut, first bearings are respectively arranged at the upper end and the lower end of the limit flange, one ends of the two first bearings, which are far away from the limit flange, are respectively abutted against the inner wall of the shell, the driven gear is in linkage connection with the periphery of the valve rod nut, the upper end and the lower end of the driven gear are respectively abutted against the two first bearings, and the driving gear is meshed with the driven gear. The utility model has less transmission stages and small friction loss, and can obviously improve the transmission efficiency.

Description

Gear transmission box

Technical Field

The utility model relates to a gear box, in particular to a gear box which is arranged on a valve and matched with a valve rod.

Background

At present, a gear box is usually arranged on the valve, the input end of the gear box is connected with a hand wheel or a motor, the output end of the gear box is connected with a valve rod on the valve, and the gear box is used for reducing speed and operating torque. The utility model provides a gear box on the valve at present, it specifically includes the box, the transmission shaft, the driving gear, driven gear, the transfer sleeve and valve rod nut, the transmission shaft runs through the box along transversely and the inner and the driving gear linkage of transmission shaft are connected, the transfer sleeve is along vertical setting in the box, the upper and lower both ends of transfer sleeve are provided with a bearing respectively, one end that the transfer sleeve was kept away from to two bearings all offsets with the box inner wall, driven gear linkage is connected in the transfer sleeve periphery, and driven gear meshes with the driving gear, valve rod nut linkage is connected in the transfer sleeve, drive the driving gear through the transmission shaft and rotate, the driving gear drives driven gear and rotates, driven gear drives the transfer sleeve and rotates, by the transmission circumference band moving valve rod nut again, finally drive valve rod motion, this structure transmission level is many, and friction loss is big, transmission efficiency is lower.

Disclosure of Invention

The utility model aims to provide a gear box which has less transmission stages and small friction loss and can remarkably improve transmission efficiency.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a gear box, includes the shell, still includes transmission shaft, driving gear, driven gear and valve rod nut, the transmission shaft runs through the shell along transversely and the inner and the driving gear linkage of transmission shaft are connected, valve rod nut sets up in the shell along vertical rotation, and valve rod nut's periphery is equipped with limit flange, limit flange's upper and lower both ends are provided with a first bearing respectively, and limit flange's one end is kept away from to two first bearings all offsets with the shell inner wall, driven gear linkage is connected in valve rod nut periphery to driven gear's upper and lower both ends offset with two first bearings respectively, driving gear with driven gear meshes mutually.

Through adopting above-mentioned technical scheme, drive gear rotation by the transmission shaft, drive gear drive driven gear rotates, and driven gear drives valve rod nut rotation, and then makes the valve rod motion, and this structure is retrencied more reliably, and is fewer for original structure transmission series, and first bearing direct setting is at valve rod nut and driven gear's both ends, greatly reduced valve rod nut and driven gear pivoted frictional force, therefore this structure has higher transmission efficiency.

The utility model is further characterized in that an inner tooth part is circumferentially arranged on the inner wall of the driven gear, and an outer tooth part meshed with the inner tooth part is circumferentially arranged on the outer wall of the limit flange.

By adopting the technical scheme, the driven gear can directly drive the valve rod nut to rotate when rotating, so that the linkage of the driven gear and the valve rod nut is realized.

The utility model further provides that the driving gear and the driven gear are spiral bevel gears.

By adopting the technical scheme, the transmission efficiency of the transmission case is higher, the transmission ratio is more stable, the bearing capacity is higher, and the transmission is more stable and smooth.

The utility model further provides a structure in which the driving gear and the transmission shaft are integrated.

By adopting the technical scheme, the device is convenient to assemble, has higher strength and is more reliable to use.

The utility model is further arranged that the shell comprises a box body with side parts and bottom parts which are open, and a side cover and a bottom cover which are respectively detachably arranged on the side part open end and the bottom open end of the box body, wherein the side cover is provided with a side hole for a transmission shaft to pass through, and the bottom cover is provided with a lower hole for a valve rod to pass through.

By adopting the technical scheme, the front-stage assembly and the later-stage disassembly maintenance operation of the parts are convenient.

The utility model further provides that the bottom cover comprises a mounting ring and an adjusting seat, the mounting ring is connected to the bottom of the box body through screws, the adjusting seat is connected to the mounting ring through threads, and one ends of the two first bearings, which are far away from the limiting flange, are respectively abutted against the inner end of the box body and the inner end of the adjusting seat.

Through adopting above-mentioned technical scheme, screw the regulation seat, can support two first bearings tightly at limit flange both ends to realize the axial positioning to the valve rod nut, and reduce the friction that receives when the valve rod nut rotates through first bearing.

The utility model is further characterized in that the inner wall of the adjusting seat is provided with a lower sealing ring which is used for forming sealing fit with the periphery of the valve rod nut, and the inner wall of the box body is provided with an upper sealing ring which is used for forming sealing fit with the periphery of the valve rod nut.

Through adopting above-mentioned technical scheme, can guarantee the leakproofness between adjusting seat and the valve rod nut and box and the valve rod nut, avoid inside medium to leak between adjusting seat and the valve rod nut and between box and the valve rod nut.

The utility model further provides a second bearing, wherein the second bearing is sleeved on the periphery of the transmission shaft, the periphery of the second bearing abuts against the inner wall of the shell, and the transmission shaft is provided with a support flange for abutting against the inner end of the second bearing and a clamp spring abutting against the outer end of the second bearing.

Through adopting above-mentioned technical scheme, the friction that receives when can reducing the transmission shaft rotation, further promotes transmission efficiency.

The utility model is further arranged that the outer end key of the transmission shaft is connected with a hand wheel.

Through adopting above-mentioned technical scheme, drive the transmission shaft through rotating the hand wheel and rotate, easy operation is convenient.

The utility model is further characterized in that a limiting step is arranged on the transmission shaft, the outer end of the transmission shaft is connected with an indicating pressing plate through a screw, the indicating pressing plate presses the hand wheel on the limiting step, and a rotation direction mark is arranged on the indicating pressing plate.

Through adopting above-mentioned technical scheme, not only can carry out axial spacing to the hand wheel, guarantee the steadiness of hand wheel installation, revolve to the sign and be convenient for operating personnel to judge whether the valve is opened or is closed during the operation moreover.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of the entire present utility model;

FIG. 3 is an exploded view of the overall utility model;

fig. 4 is a schematic diagram of the cooperation structure of the driven gear and the valve stem nut according to the present utility model.

In the figure: 1. a housing; 2. a transmission shaft; 3. a drive gear; 4. a valve stem nut; 5. a limit flange; 6. a first bearing; 7. an internal tooth portion; 8. external tooth part; 9. a case; 10. a side cover; 11. a bottom cover; 12. a side hole; 13. a lower hole; 14. a mounting ring; 15. an adjusting seat; 16. a lower sealing ring; 17. an upper sealing ring; 18. a second bearing; 19. a support flange; 20. clamping springs; 21. a hand wheel; 22. a limit step; 23. an indication pressing plate; 24. a spin-direction flag; 25. a driven gear.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

Examples: the gear box as shown in fig. 1-4 comprises a shell 1, and further comprises a transmission shaft 2, a driving gear 3, a driven gear 25 and a valve rod nut 4, wherein the transmission shaft 2 transversely penetrates through the shell 1, the inner end of the transmission shaft 2 is connected with the driving gear 3 in a linkage manner, the valve rod nut 4 is vertically arranged in the shell 1 in a rotating manner, an inner thread is arranged on the inner periphery of the valve rod nut 4 and is used for being matched with an outer thread on a valve rod, a limit flange 5 is arranged on the outer periphery of the valve rod nut 4, the limit flange 5 and the valve rod nut 4 are of an integrated structure, a first bearing 6 is respectively arranged at the upper end and the lower end of the limit flange 5, the first bearings 6 are thrust roller bearings, one ends of the two first bearings 6, far away from the limit flange 5, are respectively abutted against the inner wall of the shell 1, the driven gear 25 is in a linkage connection with the outer periphery of the valve rod nut 4, and the upper end and the lower end of the driven gear 25 are respectively abutted against the two first bearings 6, and the driving gear 3 is meshed with the driven gear 25. The driving gear 3 is driven to rotate by the transmission shaft 2, the driving gear 3 drives the driven gear 25 to rotate, the driven gear 25 drives the valve rod nut 4 to rotate, and then the valve rod is driven to move, the structure is more simplified and reliable, the transmission level is fewer compared with the original structure, and the first bearings 6 are directly arranged at the two ends of the valve rod nut 4 and the driven gear 25, so that the friction force of the rotation of the valve rod nut 4 and the driven gear 25 is greatly reduced, and the structure has higher transmission efficiency.

As shown in fig. 4, an inner tooth portion 7 is circumferentially provided on an inner wall of the driven gear 25, and an outer tooth portion 8 meshed with the inner tooth portion 7 is circumferentially provided on an outer wall of the limit flange 5. When the driven gear 25 rotates, the valve rod nut 4 can be directly driven to rotate, so that the two are linked.

Wherein, the driving gear 3 and the driven gear 25 are spiral bevel gears. The design can enable the transmission efficiency of the transmission case to be higher, the transmission ratio to be more stable, the bearing capacity to be higher, and the transmission to be more stable and smooth.

Wherein, the driving gear 3 and the transmission shaft 2 are in an integrated structure. The design is not only convenient for assembly, but also has higher strength and more reliable use.

As shown in fig. 2 and 3, the casing 1 includes a box 9 with side and bottom openings, and a side cover 10 and a bottom cover 11 detachably mounted on the side and bottom openings of the box 9, respectively, the side cover 10 is provided with a side hole 12 for the transmission shaft 2 to pass through, and the bottom cover 11 is provided with a lower hole 13 for the valve rod to pass through. The design is convenient for the earlier assembly of parts and the later disassembly and maintenance operation.

As shown in fig. 2 and fig. 3, the bottom cover 11 includes a mounting ring 14 and an adjusting seat 15, the mounting ring 14 is connected to the bottom of the box 9 by a screw, a sealing ring is sandwiched between the mounting ring 14 and the box 9, the adjusting seat 15 is screwed into the mounting ring 14, and one ends of the two first bearings 6 away from the limit flange 5 respectively abut against the inner end of the box 9 and the inner end of the adjusting seat 15. The adjusting seat 15 is screwed tightly, so that the two first bearings 6 can be abutted against the two ends of the limiting flange 5, the axial positioning of the valve rod nut 4 is realized, and the friction born by the valve rod nut 4 during rotation is reduced through the first bearings 6.

As shown in fig. 2, a lower sealing ring 16 for forming sealing fit with the outer periphery of the valve rod nut 4 is installed on the inner wall of the adjusting seat 15, and an upper sealing ring 17 for forming sealing fit with the outer periphery of the valve rod nut 4 is installed on the inner wall of the box body 9. This design can guarantee the leakproofness between adjusting seat 15 and valve rod nut 4 and box 9 and valve rod nut 4, avoids inside medium to leak between adjusting seat 15 and valve rod nut 4 and between box 9 and valve rod nut 4.

As shown in fig. 2, the device further comprises a second bearing 18, the second bearing 18 is sleeved on the periphery of the transmission shaft 2, the periphery of the second bearing 18 abuts against the inner wall of the housing 1, the transmission shaft 2 is provided with a support flange 19 for abutting against the inner end of the second bearing 18 and a clamp spring 20 for abutting against the outer end of the second bearing 18, the support flange 19 and the transmission shaft 2 are of an integral structure or welded on the transmission shaft 2, and the periphery of the second bearing 18 is further provided with a clamping groove for clamping the clamp spring 20. The design can reduce the friction received when the transmission shaft 2 rotates, and further improve the transmission efficiency.

As shown in fig. 2, a hand wheel 21 is connected to the outer end key of the transmission shaft 2. The transmission shaft 2 is driven to rotate by rotating the hand wheel 21, and the operation is simple and convenient.

As shown in fig. 1 and fig. 2, the transmission shaft 2 is provided with a limit step 22, the outer end of the transmission shaft 2 is connected with an indication pressing plate 23 through a screw, the indication pressing plate 23 presses the hand wheel 21 on the limit step 22, and the indication pressing plate 23 is provided with a turning mark 24. The design ensures the stability of the installation of the hand wheel 21, and the turning direction mark 24 is convenient for an operator to judge whether the valve is opened or closed during operation.

Claims

1. A gear box comprising a housing (1), characterized in that: still include transmission shaft (2), driving gear (3), driven gear (25) and valve rod nut (4), transmission shaft (2) transversely run through shell (1) and the inner and driving gear (3) linkage of transmission shaft (2) are connected, valve rod nut (4) are along vertical rotation setting in shell (1), and the periphery of valve rod nut (4) is equipped with limit flange (5), the upper and lower both ends of limit flange (5) are provided with a first bearing (6) respectively, and the one end that limit flange (5) was kept away from to two first bearings (6) all offsets with shell (1) inner wall, driven gear (25) linkage is connected in valve rod nut (4) periphery to the upper and lower both ends of driven gear (25) offset with two first bearings (6) respectively, driving gear (3) with driven gear (25) mesh mutually.

2. A gear box according to claim 1, wherein: an inner tooth part (7) is circumferentially arranged on the inner wall of the driven gear (25), and an outer tooth part (8) meshed with the inner tooth part (7) is circumferentially arranged on the outer wall of the limit flange (5).

3. A gear box according to claim 1, wherein: the driving gear (3) and the driven gear (25) are spiral bevel gears.

4. A gear box according to claim 1, wherein: the driving gear (3) and the transmission shaft (2) are of an integrated structure.

5. A gear box according to claim 1, wherein: the shell (1) comprises a box body (9) with side parts and bottom parts open, and a side cover (10) and a bottom cover (11) which are respectively detachably arranged at the side part open ends and the bottom open end of the box body (9), wherein a side hole (12) for a transmission shaft (2) to pass through is formed in the side cover (10), and a lower hole (13) for a valve rod to pass through is formed in the bottom cover (11).

6. A gear box according to claim 5, wherein: the bottom cover (11) comprises a mounting ring (14) and an adjusting seat (15), the mounting ring (14) is connected to the bottom of the box body (9) through screws, the adjusting seat (15) is connected in the mounting ring (14) in a threaded mode, and one ends, far away from the limiting flange (5), of the two first bearings (6) are respectively abutted to the inner end of the box body (9) and the inner end of the adjusting seat (15).

7. A gear box according to claim 6, wherein: the inner wall of the adjusting seat (15) is provided with a lower sealing ring (16) which is in sealing fit with the periphery of the valve rod nut (4), and the inner wall of the box body (9) is provided with an upper sealing ring (17) which is in sealing fit with the periphery of the valve rod nut (4).

8. A gear box according to claim 1, wherein: the novel transmission shaft comprises a transmission shaft (2) and is characterized by further comprising a second bearing (18), wherein the second bearing (18) is sleeved on the periphery of the transmission shaft (2), the periphery of the second bearing (18) is propped against the inner wall of the shell (1), and the transmission shaft (2) is provided with a support flange (19) which is propped against the inner end of the second bearing (18) and a clamp spring (20) which is propped against the outer end of the second bearing (18).

9. A gear box according to claim 1, wherein: the outer end key of the transmission shaft (2) is connected with a hand wheel (21).

10. A gear box according to claim 1, wherein: the driving shaft (2) is provided with a limiting step (22), the outer end of the driving shaft (2) is connected with an indicating pressing plate (23) through a screw, the indicating pressing plate (23) presses the hand wheel (21) on the limiting step (22), and the indicating pressing plate (23) is provided with a rotation direction mark (24).