Worm and gear speed reducer

Abstract

The utility model discloses a worm and gear speed reducer which comprises a shell, a worm gear, a first cover plate, a first bearing and a worm. The worm gear is rotationally connected into the shell; a first mounting groove is formed in one side of the shell, the first bearing is arranged in the first mounting groove, the first cover plate comprises a main plate and a first threaded part, an oil filling port is formed in the main plate, a second mounting groove is formed in the side, away from the first mounting groove, of the shell, and one end of the worm extends out of the shell through the second mounting groove. The other end of the worm is rotationally connected into the first mounting groove through a first bearing, a channel is formed in the end, close to the oil filling port, of the worm, one end of the channel penetrates through the end face of the worm to form an inlet facing the oil filling port, and the other end of the channel penetrates to the lower side of the worm to form an outlet facing the bottom of the shell. And the channel is transited from the inlet to the outlet through a fillet. The utility model provides a worm and gear speed reducer. Lubricating oil at the bottom of a shell can be conveniently pumped out.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a worm and worm gear speed reducer. Background Technique

[0002] The existing worm and worm gear speed reducer is as Figure 4 shown, which includes a housing 201, a worm 202 and a worm gear 203. The worm gear is rotatably connected in the housing. The worm is fitted under the worm gear and rotatably connected in the housing. One end of the worm extends outside the housing and is used to connect with a driving motor. In actual use, lubricating oil is provided in the housing to reduce the wear of the worm gear and the worm. To facilitate the addition of lubricating oil, an oil filling port 204 and a sealing cover 205 covering the oil filling port are provided on the upper side of the existing housing. When lubricating oil needs to be filled, the sealing cover is opened and then lubricating oil is added inward.

[0003] It is inconvenient to pump oil from the housing of the existing speed reducer. Specifically, blocked by the worm gear, the oil suction pipe cannot be extended to the bottom of the housing through the oil filling port to pump out the dirty lubricating oil at the bottom of the housing. Content of the Utility Model

[0004] In order to solve the disadvantage that it is inconvenient to pump out the lubricating oil at the bottom of the housing of the existing speed reducer, the utility model provides a worm and worm gear speed reducer, which is convenient to pump out the lubricating oil at the bottom of the housing.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A worm and worm gear speed reducer includes: a housing, a worm gear, a first cover plate, a first bearing and a worm; the worm gear is rotatably connected in the housing; a first installation groove is provided on one side of the housing, the first bearing is arranged in the first installation groove, the first cover plate includes a main board and a first threaded part, an oil filling port is arranged on the main board, the first threaded part is threadedly connected in the oil filling port, the main board is detachably and sealingly connected to the outside of the first installation groove, and limits the first bearing in the first installation groove; the worm is fitted under the worm gear and rotatably connected in the housing, a second installation groove is provided on the side of the housing away from the first installation groove, one end of the worm extends outside the housing through the second installation groove, the other end of the worm is rotatably connected to the first installation groove through the first bearing, a channel is provided at one end of the worm close to the oil filling port, one end of the channel penetrates through the end face of the worm to form an inlet facing the oil filling port, the other end of the channel penetrates to the lower side of the worm to form an outlet facing the bottom of the housing, and the channel is transitioned by a fillet between the inlet and the outlet.

[0007] Through the above settings, first, it is convenient to replace and repair the first bearing; second, it is convenient to add lubricating oil into the housing through the oil filling port; third, it is convenient to extend a pipe into the housing through the oil filling port and the channel. After the pipe reaches the bottom of the housing, the dirty lubricating oil at the bottom of the housing can be pumped out through the pipe.

[0008] Furthermore, a first support block is fixedly connected to the inner side of the first installation groove. The first support block supports the inner side of the first bearing. The main board is hermetically and detachably connected to the outer side of the first installation groove through a second threaded member. At least part of the main board is embedded in the first installation groove and supports the outer side of the first bearing.

[0009] With the above settings, the first support block and the main board support the inner and outer sides of the first bearing, preventing the first bearing from moving axially in and out.

[0010] Furthermore, the speed reducer further includes a second bearing and a second cover plate. The second bearing is installed in the second installation groove. The second cover plate is hermetically and detachably connected to the outer side of the second installation groove and limits the second bearing in the second installation groove. The worm passes through the second cover plate and the second bearing, and the worm is rotationally connected to the second installation groove through the second bearing.

[0011] With the above settings, the second bearing reduces the friction between the worm and the second installation groove; in addition, it is also convenient to replace and repair the second bearing.

[0012] Furthermore, a second support block is fixedly connected to the inner side of the second installation groove. The second support block supports the inner side of the second bearing. The second cover plate is hermetically and detachably connected to the outer side of the second installation groove through a second threaded member. At least part of the second cover plate is embedded in the second installation groove and supports the outer side of the second bearing.

[0013] With the above settings, the second support block and the second cover plate support the inner and outer sides of the second bearing, preventing the second bearing from moving axially in and out.

[0014] Furthermore, the channel includes a horizontal section coaxial with the worm, and a vertical section perpendicularly connected to the horizontal section. One end of the horizontal section is provided with an inlet. The other end of the horizontal section transitions to the vertical section through a fillet. The outlet is arranged at one end of the vertical section far from the horizontal section.

[0015] Furthermore, a positioning block is fixedly connected to the end face of the worm close to the channel, and the positioning block can be seen through the fuel filling port.

[0016] With the above settings, it is convenient to rotate the outlet to the lower side of the worm so as to extend the hose to the bottom of the housing.

[0017] Furthermore, the first threaded member is set as a hexagonal bolt.

[0018] With the above settings, it is convenient to rotate the first threaded member using a wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the speed reducer of the embodiment.

[0020] Figure 2 It is a cross-sectional view of the speed reducer of the embodiment.

[0021] Figure 3 Schematic diagram of the speed reducer of the embodiment extending into the hose.

[0022] Figure 4 Schematic diagram of an existing speed reducer. Specific implementation mode

[0023] The technical solution of the present utility model will be further specifically described below through embodiments in conjunction with the accompanying drawings.

[0024] As Figures 1 to 3 , a worm and worm gear speed reducer includes: a housing 3, a worm wheel 4, a first cover plate 5, a first bearing 6 and a worm 7; the worm wheel 4 is rotatably connected in the housing 3; a first installation groove 31 is provided on one side of the housing 3, the first bearing 6 is arranged in the first installation groove 31, the first cover plate 5 includes a main board 51 and a first threaded member 52, a fuel filling port 511 is arranged on the main board 51, the first threaded member 52 is threadedly connected in the fuel filling port 511, the main board 51 is sealingly and detachably connected to the outside of the first installation groove 31, and the first bearing 6 is limited in the first installation groove 31; the worm 7 is fitted under the worm wheel 4 and is rotatably connected in the housing 3, a second installation groove 32 is provided on the side of the housing 3 away from the first installation groove 31, one end of the worm 7 extends out of the housing 3 through the second installation groove 32, the other end of the worm 7 is rotatably connected in the first installation groove 31 through the first bearing 6, a channel 71 is arranged at one end of the worm 7 close to the fuel filling port 511, one end of the channel 71 penetrates through the end face of the worm 7 to form an inlet 72 facing the fuel filling port 511, the other end of the channel 71 penetrates to the lower side of the worm 7 to form an outlet 73 facing the bottom of the housing 3, and the channel 71 is transitioned by a fillet 74 between the inlet 72 and the outlet 73.

[0025] Through the above settings, first, it is convenient to replace and repair the first bearing 6; second, it is convenient to add lubricating oil into the housing 3 through the fuel filling port 511; third, it is convenient to extend a tube into the housing 3 through the fuel filling port 511 and the channel 71. After the tube reaches the bottom of the housing 3, the dirty lubricating oil at the bottom of the housing 3 can be pumped out through the tube.

[0026] When the speed reducer of the present application is running, an external motor is drivingly connected to the outer end of the worm 7. After the worm 7 rotates, it drives the worm wheel 4 to rotate, and the worm wheel 4 drives an external device to operate; the first bearing 6 reduces the friction between the worm 7 and the first installation groove 31. The first cover plate 5 covers the outside of the first installation groove 31 to prevent the first bearing 6 from falling out of the first installation groove 31. When the first bearing 6 needs to be replaced or repaired, remove the first cover plate 5, then the first bearing 6 can be taken out of the first installation groove 31, and then a new first bearing 6 is replaced, and then the first cover plate 5 is reinstalled, without disassembling the entire housing 3; lubricating oil is stored at the bottom of the housing 3, and the lower side of the worm 7 is immersed in the lubricating oil. When the worm 7 rotates, it will bring up the lubricating oil on the lower side and lubricate the worm wheel 4, reducing the wear of the worm wheel 4 and the worm 7; in reality, after long-term use, the lubricating oil will decrease. After the operator unscrews the first threaded part 52, the oil filling port 511 is exposed to the air. The oil filling port 511 penetrates through the inner and outer sides of the main board 51. Lubricating oil can be added to the housing 3 through the oil filling port 511. After the addition is completed, the first threaded part 52 is screwed back onto the oil filling port 511 to seal the oil filling port 511; in addition, when the lubricating oil in the housing 3 needs to be pumped out, unscrew the first threaded part 52, the hose passes through the oil filling port 511 and the inlet 72 into the channel 71, push the hose inward, the hose automatically bends and deforms under the action of the rounded corner 74, and finally extends downward through the outlet 73 to the bottom of the housing 3 and is immersed in the lubricating oil, as Figure 3 , at this time, the lubricating oil at the bottom of the housing 3 can be pumped out through the hose. After the pumping is completed, new lubricating oil is added inward through the hose, then the hose is removed, and then the first threaded part 52 is screwed back onto the oil filling port 511.

[0027] As an implementation method, a first support block 33 is fixedly connected to the inner side of the first installation groove 31. The first support block 33 supports the inner side of the first bearing 6. The main board 51 is hermetically and detachably connected to the outside of the first installation groove 31 through a second threaded part 8. At least part of the main board 51 is embedded in the first installation groove 31 and supports the outer side of the first bearing 6.

[0028] Through the above settings, the first support block 33 and the main board 51 support the inner and outer sides of the first bearing 6 to prevent the first bearing 6 from moving axially inward and outward.

[0029] As an implementation method, the speed reducer further includes a second bearing 9 and a second cover plate 10. The second bearing 9 is installed in the second installation groove 32. The second cover plate 10 is hermetically and detachably connected to the outside of the second installation groove 32 and limits the second bearing 9 in the second installation groove 32. The worm 7 passes through the second cover plate 10 and the second bearing 9, and the worm 7 is rotationally connected to the second installation groove 32 through the second bearing 9.

[0030] Through the above settings, the second bearing 9 reduces the friction between the worm 7 and the second installation groove 32; in addition, it is also convenient to replace and repair the second bearing 9.

[0031] In this application, a round hole adapted to the worm 7 is provided on the second cover plate 10. The worm 7 passes through the second cover plate 10 through the round hole. A rubber ring can be installed on the inner wall of the round hole to improve the sealing performance and prevent oil leakage. After removing the second cover plate 10, the second bearing 9 can be taken out from the second installation groove 32. After replacing the new second bearing 9, the second cover plate 10 can be reinstalled outside the second installation groove 32, and there is no need to disassemble the entire housing 3.

[0032] As an implementation manner, a second support block 34 is fixedly connected to the inner side of the second installation groove 32. The second support block 34 supports the inner side of the second bearing 9. The second cover plate 10 is detachably connected to the outside of the second installation groove 32 in a sealed manner through the second threaded member 8. At least part of the second cover plate 10 is embedded in the second installation groove 32 and supports the outer side of the second bearing 9.

[0033] Through the above settings, the second support block 34 and the second cover plate 10 support the inner and outer sides of the second bearing 9 to prevent the second bearing 9 from moving axially.

[0034] As an implementation manner, the channel 71 includes a horizontal section 711 coaxial with the worm 7 and a vertical section 712 vertically connected to the horizontal section 711. An inlet 72 is provided at one end of the horizontal section 711. The other end of the horizontal section 711 is transitioned to the vertical section 712 through a fillet 74. An outlet 73 is provided at one end of the vertical section 712 away from the horizontal section 711.

[0035] As an implementation manner, a positioning block 75 is fixedly connected to the end face of the worm 7 close to the channel 71, and the positioning block 75 can be seen through the fuel filling port 511.

[0036] Through the above settings, it is convenient to rotate the outlet 73 to the lower side of the worm 7 so that the hose can be extended to the bottom of the housing 3.

[0037] In this application, after removing the first threaded member 52, the operator can see the positioning block 75 through the fuel filling port 511, and determine the position of the outlet 73 according to the position of the positioning block 75. In this application, when the worm 7 rotates, the positioning block 75 and the outlet 73 rotate synchronously with the worm 7. When the positioning block 75 rotates to the upper side of the inlet 72, the outlet 73 faces downward. At this time, by inserting a hose through the fuel filling port 511, the hose can be extended to the bottom of the housing 3.

[0038] As an implementation manner, the first threaded member 52 is set as a hexagon bolt.

[0039] Through the above settings, it is convenient to rotate the first threaded member 52 with a wrench.

[0040] It should be understood that those of ordinary skill in the art can make improvements or modifications based on the above description, and all such improvements and modifications shall fall within the protection scope of the appended claims of this utility model.

Claims

1. A worm and worm gear speed reducer, characterized in that, Comprising: A housing and a worm wheel, the worm wheel being rotatably connected within the housing; A first cover plate and a first bearing, a first mounting groove being provided on one side of the housing, the first bearing being disposed within the first mounting groove, the first cover plate including a main board and a first threaded member, a fuel filling port being provided on the main board, the first threaded member being threadedly connected within the fuel filling port, the main board being sealingly and detachably connected to the outside of the first mounting groove and limiting the first bearing within the first mounting groove; A worm, the worm being engaged with the lower side of the worm wheel and rotatably connected within the housing, a second mounting groove being provided on the side of the housing away from the first mounting groove, one end of the worm extending outside the housing through the second mounting groove, the other end of the worm being rotatably connected within the first mounting groove through the first bearing, a channel being provided at one end of the worm close to the fuel filling port, one end of the channel penetrating through the end face of the worm to form an inlet facing the fuel filling port, the other end of the channel penetrating to the lower side of the worm to form an outlet facing the bottom of the housing, the channel being transitioned by a fillet between the inlet and the outlet.

2. The worm and worm gear reducer according to claim 1, characterized in that, A first support block is fixedly connected to the inner side of the first mounting groove, the first support block supporting the inner side of the first bearing, the main board being sealingly and detachably connected to the outside of the first mounting groove through a second threaded member, and at least a part of the main board being embedded within the first mounting groove and supporting the outer side of the first bearing.

3. A worm and worm gear reducer according to claim 2, characterized in that, The speed reducer further includes a second bearing and a second cover plate, the second bearing being installed within the second mounting groove, the second cover plate being sealingly and detachably connected to the outside of the second mounting groove and limiting the second bearing within the second mounting groove, the worm passing through the second cover plate and the second bearing, and the worm being rotatably connected to the second mounting groove through the second bearing.

4. A worm and worm gear reducer according to claim 3, characterized in that, A second support block is fixedly connected to the inner side of the second mounting groove, the second support block supporting the inner side of the second bearing, the second cover plate being sealingly and detachably connected to the outside of the second mounting groove through a second threaded member, and at least a part of the second cover plate being embedded within the second mounting groove and supporting the outer side of the second bearing.

5. A worm and worm gear reducer according to claim 1, characterized in that, The channel includes a horizontal section coaxial with the worm, and a vertical section perpendicularly connected to the horizontal section, the inlet being provided at one end of the horizontal section, the other end of the horizontal section being transitioned to the vertical section through the fillet, and the outlet being provided at the end of the vertical section away from the horizontal section.

6. A worm and worm gear speed reducer according to claim 1, characterized in that, A positioning block is fixedly connected to the end face of the worm close to the channel, and the positioning block can be seen through the fuel filling port.

7. A worm and worm gear reducer according to claim 1, characterized in that, The first threaded member is provided as a hexagon bolt.

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