Transmission power-assisted mechanism and ball valve

Abstract

The utility model relates to the technical field of valves, in particular to a transmission assisting mechanism and a ball valve, the transmission assisting mechanism comprises an upper gear box, a lower gear box, a fixing plate, an upper speed reduction device, a lower speed reduction device and a transmission piece, an inner cavity of the upper gear box and an inner cavity of the lower gear box define an installation cavity, the fixing plate is installed in the installation cavity, and the upper speed reduction device and the lower speed reduction device are arranged in the installation cavity. The installation cavity is divided into the first installation cavity and the second installation cavity, the upper speed reduction device and the lower speed reduction device are installed in the first installation cavity and the second installation cavity respectively, the transmission part is connected between the upper speed reduction device and the lower speed reduction device, the structure is compact, and the upper gear box and the lower gear box can adopt regular shapes. The parts can be conveniently welded into a whole through a plane welding process, and buckling deformation of the parts due to stress is avoided; the ball valve comprises a valve body, a valve element, a central stand column, a connecting rod and the transmission power-assisting mechanism, and the transmission power-assisting mechanism can reduce applied force needed for controlling opening and closing of the ball valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field more particularly, relate to a transmission power assisting mechanism and ball valve. BACKGROUND

[0002] PE gas ball valve is used as the control element of city PE gas pipeline, is widely used in PE gas pipeline. The commonly used specification of PE gas ball valve has DN63~DN400, and the greater the specification is, the greater the opening and closing operation torque of the valve is, especially the specification of greater than or equal to DN200, generally is equipped with gear power assisting mechanism. The current power assisting mechanism usually adopts the structure that gear single layer distribution is installed in the gear box, the upper gear box and the lower gear box are irregular shape and the volume is relatively large, the upper and lower boxes adopt bolt locking, the two gear boxes are prepared through injection molding method, and the gear box parts exist stress warping deformation after molding, and the problem of rusting of the gear in the box, gear biting and valve opening and closing difficulty caused by water entering the gear box will still exist after long time use. SUMMARY

[0003] The utility model discloses a transmission power assisting mechanism that overcomes the stress warping caused by the irregular shape of the gear box in the prior art, has small volume and compact structure, and can design the gear box into regular shape to avoid stress warping.

[0004] To solve the above technical problems, the utility model adopts the technical scheme that:

[0005] Provide a kind of transmission power assisting mechanism, including upper gear box, lower gear box, fixed plate, upper deceleration device, lower deceleration device and transmission piece, the inner cavity of the upper gear box and the inner cavity of the lower gear box are enclosed to install cavity, the fixed plate is installed in the installation cavity, and the installation cavity is divided into first installation cavity and second installation cavity, the upper deceleration device is installed in the first installation cavity, the lower deceleration device is installed in the second installation cavity, the transmission piece passes through the fixed plate, the transmission piece is connected between the upper deceleration device and the lower deceleration device, the input end of the upper deceleration device is connected with the input shaft set through the upper gear box, the output end of the lower deceleration device is connected with the output shaft set through the lower gear box.

[0006] The utility model discloses a transmission power assisting mechanism, when installing, the lower gear box is welded at the top of ball valve, and the output shaft passes through the lower gear box and is connected with the connecting rod of ball valve, and the upper gear box cover is combined on the lower gear box, and the fixed plate is installed in the installation cavity, and the fixed plate divides the installation cavity into first installation cavity and second installation cavity, install the lower reduction gear in the second installation cavity, make the output end of lower gear box connect with the output shaft, install the upper reduction gear in the first installation cavity, and the input shaft passes through the upper gear box and is connected with the upper reduction gear, and the transmission part passes through the fixed plate and is connected between the upper reduction gear and the lower reduction gear, the welding end face of upper gear box and lower gear box is heated after through special vertical welding equipment, and the position of upper gear box and lower gear box is adjusted, and the end face of upper gear box and lower gear box is welded together, and the installation of transmission power assisting mechanism is completed, when using, the torque of the input shaft that the upper reduction gear and the lower reduction gear are increased is output to the connecting rod through the output shaft, makes the connecting rod rotate, and the opening and closing of ball valve are controlled, because the upper reduction gear and the lower reduction gear adopt the structure of upper and lower superposition and double -layer distribution, and the volume is small, and the structure is relatively compact, and the upper gear box and lower gear box can adopt regular shape such as circle, and the plane welding process is convenient to be welded as a whole, avoids the warping deformation of part injection molding because of stress, and the problem of rust of gear caused by water inlet due to the sealing is not strict.

[0007] Further, the inner wall of the lower gear box is provided with a boss for supporting the fixed plate, and the fixed plate is fixedly installed on the boss. The fixed plate is supported by the boss, which can improve the load capacity of the fixed plate and more stably install the upper reduction gear, the lower reduction gear and the transmission part.

[0008] Further, the fixed plate is provided with a first screw hole, and the boss is provided with a second screw hole alignable with the first screw hole. When installing the fixed plate, the fixed plate is placed on the boss, the position of the fixed plate is adjusted to align the first screw hole with the second screw hole, the screw is screwed into the first screw hole and the second screw hole, and the fixed plate is locked on the boss.

[0009] Further, the upper deceleration device comprises an upper gear set, the lower deceleration device comprises a lower gear set, the input shaft and the output shaft are both rotationally connected with the fixed plate, the input shaft is fixedly connected with the input end of the upper gear set, the output shaft is fixedly connected with the output end of the lower gear set, and the upper gear set is connected with the lower gear set through the transmission member. During installation, the upper gear set and the lower gear set are respectively installed in the first installation cavity and the second installation cavity, and the input shaft and the output shaft are respectively connected with the upper gear set and the lower gear set, so that one end of the input shaft is located outside the installation cavity, the other end is rotationally connected with the fixed plate, one end of the output shaft is rotationally connected with the fixed plate, and the other end is fixedly connected with the connecting rod of the ball valve; during use, a key or other tool is used to rotate the input shaft, so that the input end of the upper gear set is rotated, the output end of the upper gear set is driven to rotate, the output end of the lower gear set is driven to rotate through the transmission member, the input end of the lower gear set is driven to rotate through the transmission member, the output end of the lower gear set is driven to rotate, and the output shaft is driven to rotate, thereby driving the connecting rod fixedly connected with the output shaft to rotate, and the opening and closing of the ball valve are controlled.

[0010] Further, the upper gear set comprises a driving gear and a first transmission gear, the lower gear set comprises a driven gear and a second transmission gear, the transmission member is a connecting gear shaft, the input shaft is fixedly connected with the axis of the driving gear, the driving gear is engaged with the first transmission gear, the second transmission gear is engaged with the driven gear, the output shaft is fixedly connected with the axis of the driven gear, and the connecting gear shaft is fixedly connected between the axis of the first transmission gear and the axis of the second transmission gear. The input shaft drives the driving gear to rotate, drives the first transmission gear to rotate, drives the connecting gear shaft to rotate through the first transmission gear, drives the second transmission gear to rotate, drives the driven gear to rotate through the second transmission gear, drives the connecting rod of the ball valve to rotate through the driven gear, and the opening and closing of the ball valve are controlled.

[0011] Further, the axes of the driving gear and the driven gear coincide. The driving gear and the driven gear are coaxially arranged, and the size of the transmission power assisting mechanism can be further reduced.

[0012] Further, the diameter of the driving gear is equal to the diameter of the second transmission gear, and the diameter of the driven gear is equal to the diameter of the first transmission gear. The diameter of the driving gear is smaller than the diameter of the driven gear, so the number of teeth of the driving gear is smaller than the number of teeth of the first transmission gear, the number of teeth of the second transmission gear is smaller than the number of teeth of the driven gear, the torque of the connecting gear shaft is greater than the torque input by the input shaft, and the torque output by the output shaft is greater than the torque of the connecting gear shaft; the input torque of the input shaft is doubled by the upper gear set and the lower gear set, and a smaller force is applied to the input shaft to achieve the opening and closing of the ball valve.

[0013] Further, the input shaft and the connecting gear shaft are plastic structures.

[0014] Further, the side of the driving gear connected with the input shaft is provided with a first glue blocking plate with a diameter larger than the meshing diameter of the driving gear, and the side of the second transmission gear connected with the connecting gear shaft is provided with a second glue blocking plate with a diameter larger than the meshing diameter of the second transmission gear.

[0015] Further, the side of the driving gear connected with the input shaft is provided with a first glue blocking plate with a diameter larger than the meshing diameter of the driving gear, and the side of the second transmission gear connected with the connecting gear shaft is provided with a second glue blocking plate with a diameter larger than the meshing diameter of the second transmission gear.

[0016] The ball valve of the utility model, when installing, installs the fixed plate, the upper speed reducer, the lower speed reducer and the transmission part in the installation cavity, welds the upper gear box and the lower gear box as a whole, installs the valve core in the valve body, installs the bottom of the center stand on the top of the valve body, installs the one end of the connecting rod on the valve core and the other end on the bottom of the output shaft, welds the top of the center stand on the bottom of the lower gear box, and the installation is completed.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The utility model discloses a transmission power assisting mechanism: 1, install cavity with fixed plate and divide into first installation cavity and second installation cavity, install upper reduction gear device and lower reduction gear device in first installation cavity and second installation cavity respectively, make upper reduction gear device and lower reduction gear device add up, double -deck distribution, and upper gear box and lower gear box can adopt circular regular shape, avoid warping deformation because of stress when injection moulding, lead to the problem of sealing after welding is not strict, water inlet leads to the gear rust, 2, form the gear transmission structure of add up, double -deck distribution, and the volume is small, and the structure is compact, 3, utilize first rubber baffle and second rubber baffle and mould cooperation and seal the mode of glue, make the tooth groove meshing surface of injection moulding process glue of initiative gear and second transmission gear not overflow, facilitate respectively with initiative gear and input shaft, second transmission gear and connecting gear shaft integration injection moulding forming, 4, use boss support fixed plate, install input shaft, output shaft and connecting gear shaft on fixed plate, make double -deck distribution structure of reduction gear set more stable.

[0019] The utility model discloses a ball valve: utilize the transmission power assisting mechanism as described above, can reduce the exerted force needed for controlling ball valve opening and closing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural diagram of the transmission power assisting mechanism and ball valve of the utility model;

[0021] Figure 2 It is the first structural diagram of the transmission power assisting mechanism of the utility model;

[0022] Figure 3 It is the second structural diagram of the transmission power assisting mechanism of the utility model;

[0023] Figure 4 It is the structural diagram of the upper gear cover of the transmission power assisting mechanism of the utility model;

[0024] Figure 5 It is the structural diagram of the lower gear cover of the transmission power assisting mechanism of the utility model;

[0025] Figure 6 It is the structural diagram of the upper reduction gear device and lower reduction gear device of the transmission power assisting mechanism of the utility model;

[0026] Figure 7 It is the first structural diagram of the fixed plate of the transmission power assisting mechanism of the utility model;

[0027] Figure 8 It is the second structural diagram of the fixed plate of the transmission power assisting mechanism of the utility model;

[0028] Figure 9 It is the structural diagram of the initiative gear of the transmission power assisting mechanism of the utility model.

[0029] In the drawings: 1, upper gear box; 11, first through hole; 12, third shaft hole; 13, sealing ring; 14, sealing ring groove; 2, lower gear box; 21, second through hole; 22, boss; 221, second screw hole; 3, fixed plate; 31, first shaft hole; 32, second shaft hole; 33, third through hole; 34, first screw hole; 35, screw; 4, upper reduction device; 41, upper gear set; 411, driving gear; 4111, first rubber blocking plate; 4112, square hole; 412, first transmission gear; 42, input shaft; 421, injection molding edge; 422, square protrusion; 5, lower reduction device; 51, lower gear set; 511, driven gear; 512, second transmission gear; 52, output shaft; 6, transmission member; 7, valve body; 8, center column; 9, connecting rod; 10, valve core. DETAILED DESCRIPTION

[0030] The utility model will be further explained in connection with specific implementation. Among them, the drawings are only for example explanation, show only is the schematic diagram, and the real object diagram, can not be understood as the limitation of this patent; in order to better illustrate the embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and the size of the actual product is not represented; for those skilled in the art, some well-known structures and their description in the drawings can be omitted, which is understandable.

[0031] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only for example explanation, and can not be understood as the limitation of this patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0032] Embodiment one

[0033] As Figures 1 to 9The utility model discloses a transmission power assisting mechanism's first embodiment provides a transmission power assisting mechanism, including upper gear box 1, lower gear box 2, fixed plate 3, upper reduction gear 4, lower reduction gear 5 and transmission 6, the inner chamber of upper gear box 1 and the inner chamber of lower gear box 2 enclose installation cavity, fixed plate 3 is installed in installation cavity, and will installation cavity divide into first installation cavity and second installation cavity, upper reduction gear 4 is installed in first installation cavity, lower reduction gear 5 is installed in second installation cavity, transmission 6 passes through fixed plate 3, transmission 6 is connected between upper reduction gear 4 and lower reduction gear 5, the input end of upper reduction gear 4 is connected with the input shaft 42 set through upper gear box 1, and the output end of lower reduction gear 5 is connected with the output shaft 52 set through lower gear box 2.

[0034] The utility model discloses a transmission power assisting mechanism, when installing, weld lower gear box 2 on the top of ball valve, make output shaft 52 pass through lower gear box 2, and with the connecting rod 9 of ball valve fixed connection, cover upper gear box 1 on lower gear box 2, install fixed plate 3 in installation cavity, and fixed plate 3 will installation cavity divide into first installation cavity and second installation cavity, install lower reduction gear 5 in second installation cavity, make the output end of lower gear box 2 with output shaft 52 connect, install upper reduction gear 4 in first installation cavity, make input shaft 42 pass through upper gear box 1, and with upper reduction gear 4 connect, make transmission 6 pass through fixed plate 3, and connect between upper reduction gear 4 and lower reduction gear 5, through the welding end face of special vertical welding equipment heat absorption of upper gear box 1 and lower gear box 2, adjust the position of upper gear box 1 and lower gear box 2, weld the end face of upper gear box 1 and lower gear box 2 together, complete the installation of transmission power assisting mechanism, when using, upper reduction gear 4 and lower reduction gear 5 will increase the torque of input shaft 42 input to upper reduction gear 4 after, export to connecting rod 9 on output shaft 52, make connecting rod 9 rotate, control the opening and closing of ball valve, because upper reduction gear 4 and lower reduction gear 5 adopt the structure of up-down superposition, double layer distribution, and the volume is small, the structure is relatively compact, and upper gear box 1 and lower gear box 2 can adopt regular shape such as circle, which is convenient for welding as a whole by using plane welding process, avoids the problem of rusting of gear caused by water inlet due to stress and warping deformation of parts injection molding, and sealing is not strict.

[0035] The inner wall of lower gear box 2 is provided with a boss 22 for supporting the fixed plate 3, and the fixed plate 3 is fixedly installed on the boss 22. The boss 22 supports the fixed plate 3, which can improve the load capacity of the fixed plate 3 and more stably install the upper reduction gear 4, the lower reduction gear 5, and the transmission 6.

[0036] The first screw hole 34 is arranged on the fixing plate 3, and the second screw hole 221 capable of being aligned with the first screw hole 34 is arranged on the boss 22. When the fixing plate 3 is installed, the fixing plate 3 is placed on the boss 22, the position of the fixing plate 3 is adjusted, the first screw hole 34 is aligned with the second screw hole 221, the screw is screwed into the first screw hole 34 and the second screw hole 221, and the fixing plate 3 is locked on the boss 22.

[0037] As shown in Figure 3 , Figure 5 , Figure 7 and Figure 8 , the first screw hole 34 is arranged on the fixing plate 3, and the second screw hole 221 capable of being aligned with the first screw hole 34 is arranged on the boss 22. When the fixing plate 3 is installed, the fixing plate 3 is placed on the boss 22, the position of the fixing plate 3 is adjusted, the first screw hole 34 is aligned with the second screw hole 221, the screw is screwed into the first screw hole 34 and the second screw hole 221, and the fixing plate 3 is locked on the boss 22. In the embodiment, the boss 22 is a fan-shaped boss, and two fan-shaped bosses are arranged in a central symmetry with respect to the center of the lower gear box 2.

[0038] Embodiment two

[0039] The embodiment is the second embodiment of the transmission assisting mechanism of the utility model, which is similar to the first embodiment, and the difference lies in that, as shown in Figure 1 and Figure 6 , the upper reduction device 4 comprises an upper gear set 41, the lower reduction device 5 comprises a lower gear set 51, the input shaft 42 and the output shaft 52 are rotationally connected with the fixing plate 3, the input shaft 42 is fixedly connected with the input end of the upper gear set 41, the output shaft 52 is fixedly connected with the output end of the lower gear set 51, and the upper gear set 41 is connected with the lower gear set 51 through the transmission member 6. When installed, the upper gear set 41 and the lower gear set 51 are respectively installed in the first installation cavity and the second installation cavity, the input shaft 42 and the output shaft 52 are respectively connected with the upper gear set 41 and the lower gear set 51, one end of the input shaft 42 is located outside the installation cavity, the other end is rotationally connected with the fixing plate 3, one end of the output shaft 52 is rotationally connected with the fixing plate 3, and the other end is fixedly connected with the connecting rod 9 of the ball valve; when used, the input shaft 42 is rotated by using a tool such as an on-off key, the input end of the upper gear set 41 is rotated, the output end of the upper gear set 41 is driven to rotate, the output end of the lower gear set 51 is driven to rotate through the transmission member 6, the input end of the lower gear set 51 is driven to rotate, the output end of the lower gear set 51 is rotated, the output shaft 52 is rotated, and the connecting rod 9 fixedly connected with the output shaft 52 is rotated, so as to control the opening and closing of the ball valve.

[0040] The first mounting cavity is provided with a first through hole 11, and the second mounting cavity is provided with a second through hole 21. The input shaft 42 passes through the first through hole 11 and is rotationally connected with the first through hole 11. The output shaft 52 passes through the second through hole 21 and is rotationally connected with the second through hole 21. When mounting, the input shaft 42 and the output shaft 52 are inserted into the first through hole 11 and the second through hole 21 respectively, and are connected with the upper gear set 41 and the lower gear set 51 respectively.

[0041] The upper gear set 41 comprises a driving gear 411 and a first transmission gear 412. The lower gear set 51 comprises a driven gear 511 and a second transmission gear 512. The transmission member 6 is a connecting gear shaft. The input shaft 42 is fixedly connected with the axis of the driving gear 411. The driving gear 411 is engaged with the first transmission gear 412. The second transmission gear 512 is engaged with the driven gear 511. The output shaft 52 is fixedly connected with the axis of the driven gear 511. The connecting gear shaft is fixedly connected between the axis of the first transmission gear 412 and the axis of the second transmission gear 512. The input shaft 42 drives the driving gear 411 to rotate, drives the first transmission gear 412 to rotate, drives the connecting gear shaft to rotate through the rotation of the first transmission gear 412, drives the second transmission gear 512 to rotate, drives the driven gear 511 to rotate through the rotation of the second transmission gear 512, and drives the connecting rod 9 of the ball valve to rotate through the rotation of the driven gear 511, so as to control the opening and closing of the ball valve.

[0042] The axes of the driving gear 411 and the driven gear 511 coincide. The driving gear 411 and the driven gear 511 are coaxially arranged, which can further reduce the size of the transmission power assisting mechanism.

[0043] As shown in Figure 2 and Figure 4 , the inner side of the input shaft 42 is provided with a sealing ring groove 14. The driving gear 411 is installed. The sealing ring 13 is installed in the sealing ring groove 14 of the first through hole 11. The input shaft 42 is inserted into the first through hole 11 and abuts against the sealing ring 13. The sealing ring 13 plays a sealing role.

[0044] As shown in Figure 6 , the centers of the driving gear 411, the driven gear 511, the first transmission gear 412 and the second transmission gear 512 are provided with square holes 4112. The end faces of the input shaft 42, the output shaft 52 and the connecting gear shaft are provided with square protrusions 422 which are in interference fit with the square holes 4112. The square protrusions 422 are inserted into the square holes 4112, which facilitates the installation of the gears.

[0045] As shown in Figure 1 , Figure 2 and Figure 6As shown, the diameter of the driving gear 411 is equal to the diameter of the second transmission gear 512, and the diameter of the driven gear 511 is equal to the diameter of the first transmission gear 412. Since the diameter of the driving gear 411 is smaller than that of the driven gear 511, the number of teeth on the driving gear 411 is less than the number of teeth on the first transmission gear 412, and the number of teeth on the second transmission gear 512 is less than the number of teeth on the driven gear 511. The torque on the connecting gear shaft is greater than the torque input to the input shaft 42, and the torque output to the output shaft 52 is greater than the torque on the connecting gear shaft. The upper gear set 41 and the lower gear set 51 further increase the input torque of the input shaft 42. Applying a smaller force to the input shaft 42 is sufficient to open and close the ball valve.

[0046] In this embodiment, the fixing plate 3 is provided with a first shaft hole 31 and a second shaft hole 32 coaxially arranged. The inner walls of the upper gear box 1 and the lower gear box 2 are provided with two third shaft holes 12 coaxially arranged. The end faces of the input shaft 42, the output shaft 52, and the square protrusion 422 connecting the gear shaft are respectively provided with a first insertion member that mates with the first shaft hole 31, a second insertion member that mates with the second shaft hole 32, and a third insertion member that mates with the third shaft hole 12. The fixing plate 3 is also provided with a third through hole 33 that mates with the connecting gear shaft, through which the connecting gear shaft passes. Figures 4 to 8 As shown.

[0047] Example 3

[0048] This embodiment is the third embodiment of the transmission assist mechanism of this utility model. This embodiment is similar to embodiment two, except that the input shaft 42 and the connecting gear shaft are both plastic structures. The driving gear 411 and the second transmission gear 512 can be placed into the molds of the input shaft 42 and the connecting gear shaft respectively, and injection molded together with the input shaft 42 and the connecting gear shaft for easy installation.

[0049] like Figure 9 As shown, a first baffle plate 4111 with a diameter larger than the meshing diameter of the drive gear 411 is provided on the side connected to the input shaft 42, and a second baffle plate with a diameter larger than the meshing diameter of the second transmission gear 512 is provided on the side connected to the connecting gear shaft. When the drive gear 411 and the input shaft 42, and the second transmission gear 512 and the connecting gear shaft are integrally injection molded, the first baffle plate 4111 and the second baffle plate cooperate with the mold to seal the material, so that the material will not overflow onto the meshing surface of the tooth grooves of the drive gear 411 and the second transmission gear 512 during the injection molding process.

[0050] In this embodiment, the input shaft 42, the output shaft 52 and the connecting gear shaft are made of PA+glass fiber high-strength plastic; the driving gear 411, the driven gear 511, the first transmission gear 412 and the second transmission gear 512 are metal gears, and the first and second rubber blocking plates are metal plates integrally formed with the driving gear 411 and the second transmission gear 512, respectively. When the driving gear 411 and the second transmission gear 512 are integrally injection molded with the input shaft 42 and the connecting gear shaft, respectively, the side end face of the first rubber blocking plate 4111 away from the gear shaft is flush with the injection molding edge 421 of the gear shaft.

[0051] As shown in Figure 5 the inner wall of the lower gear box 2 is provided with a boss 22 for supporting the fixing plate 3, and the fixing plate 3 is fixedly installed on the boss 22. Supporting the fixing plate 3 with the boss 22 can improve the load capacity of the fixing plate 3, and can more stably install the input shaft 42, the output shaft 52 and the connecting gear shaft.

[0052] The working principle of the transmission assisting mechanism of the embodiment is as follows: during installation, the lower gear box 2 is welded on the top of the ball valve, the output shaft 52 is inserted into the lower gear box 2 through the second through hole 21 provided with the sealing ring 13, is installed in cooperation with the connecting rod 9 of the ball valve, the driven gear 511 is installed on the output shaft 52 through cooperation of the square hole 4112 and the square protrusion 422, the connecting gear shaft integrally injection molded with the second transmission gear 512 is installed on the lower gear box 2 through cooperation of the third plug-in part and the third shaft hole 12, so that the second transmission gear 512 is engaged with the driven gear 511, the position of the fixed plate 3 is adjusted, so that the second shaft hole 32 is aligned with the second plug-in part of the output shaft 52, the third through hole 33 is aligned with the connecting gear shaft, and the first screw hole 34 is aligned with the second screw hole 221, the fixed plate 3 is placed on the two bosses 22, the screws are screwed into the first screw hole 34 and the second screw hole 221, the fixed plate 3 is locked on the bosses 22, the first transmission gear 412 is installed on the connecting gear shaft through cooperation of the square hole 4112 and the square protrusion 422, the input shaft 42 integrally injection molded with the driving gear 411 is inserted into the upper gear box 1 through the first through hole 11 provided with the sealing ring 13, the first plug-in part of the input shaft 42 is inserted into the first shaft hole 31 of the fixed plate 3, and the installation of the input shaft 42 is completed, the welding end faces of the upper gear box 1 and the lower gear box 2 are heated by using a special vertical welding equipment, the positions of the upper gear box 1 and the lower gear box 2 are adjusted, so that the first through hole 11 is aligned with the second through hole 21, and the axis of the input shaft 42 coincides with the output shaft 52, the end faces of the upper gear box 1 and the lower gear box 2 are welded together, and the installation of the transmission assisting mechanism is completed; during use, the input shaft 42 is rotated by using a key or the like, so that the driving gear 411 rotates, the first transmission gear 412 rotates, the second transmission gear 512 rotates through the connecting gear shaft, the driven gear 511 rotates through the second transmission gear 512, the output shaft 52 rotates, and the connecting rod 9 fixedly connected with the output shaft 52 rotates, so that the opening and closing of the ball valve are controlled.

[0053] Embodiment four

[0054] The embodiment is a first embodiment of the ball valve of the utility model, which comprises a valve body 7, a valve core 10, a center stand 8, a connecting rod 9 and a transmission assisting mechanism as described above, the valve core 10 is movably installed in the valve body 7, one end of the connecting rod 9 is fixedly connected with the valve core 10, the other end is fixedly connected with the output shaft 52, the center stand 8 is sleeved outside the connecting rod 9, one end of the center stand 8 is installed at the bottom of the lower gear box 2, and the other end is installed at the top of the valve body 7. In the embodiment, the center stand 8 and the lower gear box 2 are connected in one body through welding. As shown in the figure. Figure 1

[0055] ​The ball valve of the utility model, when installing, installs fixed plate 3, upper speed reducer 4, lower speed reducer 5 and transmission part 6 in the installation cavity, welds upper gear box 1 and lower gear box 2 into a whole, installs valve core 10 in valve body 7, installs the bottom of center stand 8 in the top of valve body 7, installs the one end of connecting rod 9 on valve core 10, installs the other end in the bottom of output shaft 52, welds the top of center stand 8 in the bottom of lower gear box 2, completes installation, when using, rotates input shaft 42 with the tool such as opening and closing key, drives output shaft 52 to rotate through upper speed reducer 4 and lower speed reducer 5, drives connecting rod 9 to rotate, and connecting rod 9 drives valve core 10 to rotate, thereby controlling the opening and closing of ball valve, and transmission power assisting mechanism can reduce the exerted force needed for controlling the opening and closing of ball valve.

[0056] In the specific contents of the above embodiment, each technical feature can be combined arbitrarily without contradiction, and to make the description simple, all possible combinations of the above technical features are not described, however, as long as the combination of the technical features does not exist contradiction, it should be considered as the scope of the present application.

[0057] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or changes can be made. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A transmission assist mechanism, characterized in that, The device includes an upper gear box (1), a lower gear box (2), a fixing plate (3), an upper reduction gear (4), a lower reduction gear (5), and a transmission component (6). The inner cavity of the upper gear box (1) and the inner cavity of the lower gear box (2) form an installation cavity. The fixing plate (3) is installed in the installation cavity and divides the installation cavity into a first installation cavity and a second installation cavity. The upper reduction gear (4) is installed in the first installation cavity, and the lower reduction gear (5) is installed in the second installation cavity. The transmission component (6) passes through the fixing plate (3) and is connected between the upper reduction gear (4) and the lower reduction gear (5). The input end of the upper reduction gear (4) is connected to an input shaft (42) that passes through the upper gear box (1), and the output end of the lower reduction gear (5) is connected to an output shaft (52) that passes through the lower gear box (2).

2. The transmission assist mechanism according to claim 1, characterized in that, The inner wall of the lower gear box (2) is provided with a boss (22) for supporting the fixing plate (3), and the fixing plate (3) is fixedly installed on the boss (22).

3. The transmission assist mechanism according to claim 2, characterized in that, The fixing plate (3) is provided with a first screw hole (34), and the boss (22) is provided with a second screw hole (221) that can be aligned with the first screw hole (34).

4. The transmission assist mechanism according to claim 1, characterized in that, The upper deceleration device (4) includes an upper gear set (41), and the lower deceleration device (5) includes a lower gear set (51). The input shaft (42) and the output shaft (52) are both rotatably connected to the fixed plate (3). The input shaft (42) is fixedly connected to the input end of the upper gear set (41), and the output shaft (52) is fixedly connected to the output end of the lower gear set (51). The upper gear set (41) is connected to the lower gear set (51) through the transmission member (6).

5. The transmission assist mechanism according to claim 4, characterized in that, The upper gear set (41) includes a driving gear (411) and a first transmission gear (412), the lower gear set (51) includes a driven gear (511) and a second transmission gear (512), the transmission component (6) is a connecting gear shaft, the input shaft (42) is fixedly connected to the axis of the driving gear (411), the driving gear (411) meshes with the first transmission gear (412), the second transmission gear (512) meshes with the driven gear (511), the output shaft (52) is fixedly connected to the axis of the driven gear (511), and the connecting gear shaft is fixedly connected between the axis of the first transmission gear (412) and the axis of the second transmission gear (512).

6. The transmission assist mechanism according to claim 5, characterized in that, The axes of the driving gear (411) and the driven gear (511) coincide.

7. The transmission assist mechanism according to claim 5, characterized in that, The diameter of the driving gear (411) is equal to the diameter of the second transmission gear (512), and the diameter of the driven gear (511) is equal to the diameter of the first transmission gear (412).

8. The transmission assist mechanism according to claim 5, characterized in that, Both the input shaft (42) and the connecting gear shaft are made of plastic.

9. The transmission assist mechanism according to claim 8, characterized in that, The side of the drive gear (411) connected to the input shaft (42) is provided with a first baffle plate (4111) with a diameter larger than the meshing diameter of the drive gear (411), and the side of the second transmission gear (512) connected to the connecting gear shaft is provided with a second baffle plate with a diameter larger than the meshing diameter of the second transmission gear (512).

10. A ball valve, characterized in that, The device includes a valve body (7), a valve core (10), a central column (8), a connecting rod (9), and a transmission assist mechanism as described in any one of claims 1 to 9. The valve core (10) is movably installed inside the valve body (7). One end of the connecting rod (9) is fixedly connected to the valve core (10), and the other end is fixedly connected to the output shaft (52). The central column (8) is sleeved outside the connecting rod (9). One end of the central column (8) is connected to the bottom of the lower gear box (2), and the other end is connected to the top of the valve body (7).

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