Double-row tapered roller bearing for hand-operated speed reducer

Abstract

The utility model relates to the technical field of bearings, in particular to a double-row tapered roller bearing for a hand-operated speed reducer. The utility model provides a double-row tapered roller bearing for a hand-operated speed reducer, which is mounted in the hand-operated speed reducer, is used for being matched and connected with a worm in the hand-operated speed reducer, and comprises an inner ring body, an outer ring body, a retainer and a plurality of tapered rollers, the number of the retainers is two, the number of the inner ring bodies is two, the retainers and the inner ring bodies are in one-to-one correspondence, the two inner ring bodies are symmetrically installed in the outer ring body, the retainers are installed on the inner ring bodies corresponding to the retainers, and a plurality of tapered rollers are evenly installed on each retainer around the axis of the retainer; and an annular hole is formed in the outer ring body. According to the double-row tapered roller bearing for the hand-operated speed reducer, lubricating oil can be conveniently filled, and the two retainers and the tapered rollers on the two retainers can be uniformly covered with the lubricating oil.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a double-row tapered roller bearing for a hand-cranked reducer. Background Art

[0002] At present, there is a hand-cranked reducer, which is installed with a driven bevel gear on the worm of the worm gear reducer, and a movable rotating shaft is installed on the worm gear reducer, and an active bevel gear is installed on the rotating shaft, and the distance between the active bevel gear and the driven bevel gear is adjusted by adjusting the distance between the rotating shaft and the worm, so that the active bevel gear and the driven bevel gear are meshed, or the active bevel gear and the driven bevel gear are disengaged. When a power outage occurs, the input motor is first removed, and then the worker drives the rotating shaft to drive the active bevel gear to move in the direction close to the driven bevel gear until the active bevel gear on the rotating shaft is meshed with the driven bevel gear on the worm, and then the crank is used to drive the rotating shaft to rotate, thereby driving the driven bevel gear and the worm to rotate, and the worm rotates to drive the worm wheel and the output shaft to rotate, so that the reducer is in working condition.

[0003] The hand-cranked reducer is equipped with a double-row tapered roller bearing for connection with the worm, but the traditional double-row tapered roller bearing has the problem of difficulty in filling lubricating oil, and the lubricating oil is difficult to evenly cover the cage and the tapered rollers on the cage. Utility Model Content

[0004] (I) The problem to be solved by the utility model is that it is difficult to add lubricating oil to the traditional double-row tapered roller bearings, and the lubricating oil is difficult to evenly cover the cage and the tapered rollers on the cage.

[0005] (II) Technical solution

[0006] A double-row tapered roller bearing for a hand-cranked reducer, the double-row tapered roller bearing is installed in the hand-cranked reducer and is used to cooperate with the worm in the hand-cranked reducer, comprising an inner ring body, an outer ring body, a cage and a plurality of tapered rollers;

[0007] The retainer and the inner ring body are both provided with two, the retainer and the inner ring body correspond to each other one by one, the two inner ring bodies are symmetrically installed in the outer ring body, the retainer is installed on the corresponding inner ring body, and each retainer is evenly installed with a plurality of tapered rollers around its axis;

[0008] An annular hole is provided inside the outer ring body, the annular hole is coaxially arranged with the outer ring body, at least one conveying hole is opened on the end surface of the outer ring body along the axial direction of the outer ring body, and one end of the conveying hole is connected to the annular hole;

[0009] At least one first oil hole and at least one second oil hole are formed in the outer ring body, one end of the first oil hole is connected to the annular hole, and the other end thereof points to one of the retaining frames, and one end of the second oil hole is connected to the annular hole, and the other end thereof points to another of the retaining frames.

[0010] According to an embodiment of the utility model, the number of the first oil holes and the second oil holes is the same, and the first oil holes and the second oil holes correspond to each other one by one, and the first oil holes and the corresponding second oil holes are distributed in a V-shape.

[0011] According to an embodiment of the utility model, a plurality of the delivery holes are provided, and the plurality of the delivery holes are evenly distributed around the axis of the outer ring body.

[0012] According to an embodiment of the utility model, a blocking member is installed at the inlet end of each of the conveying holes, and the blocking member is used to control the opening and closing of the conveying hole.

[0013] According to an embodiment of the utility model, the plugging member includes a column and a sealing cover, the column is sealingly installed at the inlet end of the delivery hole, the first end of the column is provided with a lumen along its axial direction, the lumen is connected with the delivery hole, the second end of the column is provided with an oil hole, the axis of the oil hole is not colinear with the axis of the lumen, and the oil hole is connected with the lumen;

[0014] The sealing cover is threadedly connected to the second end of the column, and an oil inlet hole is opened on the sealing cover along its axial direction, and the axis of the oil inlet hole is not colinear with the axis of the sealing cover;

[0015] When the sealing cover rotates to a first state, the oil inlet hole and the oil through hole are connected, and when the sealing cover rotates to a second state, the oil inlet hole and the oil through hole are staggered.

[0016] According to an embodiment of the utility model, a rubber plug is installed in the oil inlet hole.

[0017] According to an embodiment of the utility model, an external thread is provided on the outer wall of the second end of the column, and an internal thread groove is provided on the inner wall of the sealing cover.

[0018] Beneficial effects of the utility model:

[0019] When oiling the double-row tapered roller bearing for a hand-cranked reducer, the oiling nozzle can be aligned with the delivery hole, and the lubricating oil in the delivery hole flows into the annular hole along the delivery hole. Since one end of the first oil hole and the second oil hole are both connected to the annular hole, the lubricating oil in the annular hole can enter the first oil hole and the second oil hole at the same time, and since the outlet ends of the first oil hole and the second oil hole are respectively facing the two retaining frames, the lubricating oil in the first oil hole and the second oil hole can eventually flow into the two retaining frames and the tapered rollers on the two retaining frames.

[0020] Compared with the traditional double-row tapered roller bearings, the double-row tapered roller bearings used in the hand-cranked reducer of the present application are easier to fill with lubricating oil, and can make the lubricating oil evenly cover the two retaining frames and the tapered rollers on the two retaining frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A three-dimensional diagram provided for the second embodiment of the utility model;

[0023] Figure 2 A top view provided for the second embodiment of the utility model;

[0024] Figure 3 The second embodiment of the present invention provides Figure 2 Sectional view of AA in the middle;

[0025] Figure 4 A cross-sectional view provided for Embodiment 1 of the present utility model;

[0026] Figure 5 A front view of the blocking member provided in the first embodiment of the utility model;

[0027] Figure 6 A cross-sectional view of a blocking member provided in Embodiment 1 of the utility model;

[0028] Figure 7 The second embodiment of the present invention provides Figure 2 Cross-sectional view of the middle BB;

[0029] Figure 8 The second embodiment of the present invention provides Figure 7 Magnified view of part C.

[0030] Icons: 1. Machine body; 2. Motor flange; 3. Worm; 301. First bevel gear; 302. Worm tooth surface; 4. Output shaft; 401. Worm wheel; 5. Hand-crank transmission device; 501. Fixed cover; 502. Locking bolt; 503. Unscrew sleeve; 504. Unscrew seat; 505. Fixed bolt; 506. Connecting bearing; 507. Rotating shaft; 508. Second bevel gear; 509. Oil seal one; 510. Oil seal two; 6. Adapter sleeve; 7. First bearing; 8. Circlip; 9. Bearing seat; 10. The first oil seal; 11. locking nut; 12. double-row tapered roller bearing; 13. third bearing; 14. second oil seal; 15. first nut; 16. second nut; 18. inner ring; 19. retaining frame; 20. tapered roller; 21. outer ring; 211. annular hole; 212. first oil hole; 213. second oil hole; 214. delivery hole; 22. sealing member; 221. column; 222. tube cavity; 223. oil hole; 224. sealing cover; 225. oil inlet hole; 226. rubber plug. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 4 , Figure 5 and Figure 6 As shown, an embodiment of the utility model provides a double-row tapered roller bearing for a hand-cranked reducer. The double-row tapered roller bearing 12 is installed in the hand-cranked reducer and is used to cooperate with the worm 3 in the hand-cranked reducer. The double-row tapered roller bearing 12 includes an inner ring body 18, an outer ring body 21, a retainer 19 and a plurality of tapered rollers 20;

[0033] There are two cages 19 and two inner ring bodies 18, and the cages 19 and the inner ring bodies 18 correspond to each other one by one. The two inner ring bodies 18 are symmetrically installed in the outer ring body 21, and the cages 19 are installed on the corresponding inner ring bodies 18. Each cage 19 is evenly installed with multiple tapered rollers 20 around its axis.

[0034] An annular hole 211 is provided inside the outer ring body 21, and the annular hole 211 is coaxially arranged with the outer ring body 21. At least one conveying hole 214 is opened on the end surface of the outer ring body 21 along the axial direction of the outer ring body 21, and one end of the conveying hole 214 is connected to the annular hole 211;

[0035] At least one first oil hole 212 and at least one second oil hole 213 are formed in the outer ring body 21. One end of the first oil hole 212 is connected to the annular hole 211, and the other end thereof points to a retaining frame 19. One end of the second oil hole 213 is connected to the annular hole 211, and the other end thereof points to another retaining frame 19.

[0036] In this embodiment, when the double-row tapered roller bearing 12 for the hand-cranked reducer is oiled, the oiling nozzle can be aligned with the delivery hole 214, and the lubricating oil in the delivery hole 214 enters the annular hole 211 along the delivery hole 214. Since one end of the first oil hole 212 and the second oil hole 213 are both connected to the annular hole 211, the lubricating oil in the annular hole 211 can enter the first oil hole 212 and the second oil hole 213 at the same time. Moreover, since the outlet ends of the first oil hole 212 and the second oil hole 213 are respectively facing the two retaining frames 19, the lubricating oil in the first oil hole 212 and the second oil hole 213 can eventually flow into the two retaining frames 19 and the tapered rollers 20 on the two retaining frames 19.

[0037] It can be seen that the double-row tapered roller bearing 12 for the hand-cranked reducer in this embodiment is easier to fill with lubricating oil than the traditional double-row tapered roller bearing, so that the lubricating oil can evenly cover the two retaining frames 19 and the tapered rollers 20 on the two retaining frames 19.

[0038] It should be noted that there are multiple first oil holes 212 and second oil holes 213, the number of the first oil holes 212 and the second oil holes 213 is the same, and the first oil holes 212 and the second oil holes 213 correspond to each other. The first oil holes 212 and the second oil holes 213 are evenly arranged around the axis of the outer ring body 21, and the first oil holes 212 and the corresponding second oil holes 213 are distributed in a herringbone shape. In this way, the lubricating oil in the annular hole 211 can enter the multiple first oil holes 212 and the second oil holes 213, and finally lubricate the tapered rollers 20 at different positions of the two retainers 19, and the filling is more uniform.

[0039] In addition, since the delivery hole 214 is arranged on the side end face of the outer ring body 21 instead of on its outer peripheral surface, even if the double-row tapered roller bearing 12 of the hand-cranked reducer is installed in place, it can be disassembled and oiled later, and oil can be directly injected into the delivery hole 214 on its side end face, which is more convenient to use.

[0040] As a preferred embodiment, Figure 4 As shown, a blocking member 22 is installed at the inlet end of the delivery hole 214. Figure 5 and Figure 6As shown, the blocking member 22 includes a column 221 and a sealing cover 224, wherein the column 221 is sealingly installed at the inlet end of the delivery hole 214, that is, the outer side surface of the column 221 is tightly fitted with the inner wall of the delivery hole 214, and the right end of the column 221 is provided with a lumen 222 along its axial direction, the lumen 222 is coaxially arranged with the column 221, and the lumen 222 extends from the right end face of the column 221 to the left end face close to the column 221. When the column 221 is installed in the inlet end of the delivery hole 214, the lumen 222 is connected with the delivery hole 214.

[0041] Furthermore, the left end of the column 221 is sealed, and an oil hole 223 is provided on its left end surface, the axis of the oil hole 223 is not colinear with the axis of the tube cavity 222, and the oil hole 223 is connected with the tube cavity 222, and an external thread is provided on the outer side surface of the left end of the column 221. The sealing cover 224 is in the shape of a round cover, and its inner wall is provided with an internal thread groove adapted to the external thread of the left end of the column 221. The sealing cover 224 is provided with an oil inlet hole 225 along its axial direction, and the axis of the oil inlet hole 225 is not colinear with the axis of the sealing cover 224.

[0042] In this way, when the sealing cover 224 is tightened, the oil inlet hole 225 on the sealing cover 224 is staggered with the oil through hole 223 at the left end of the column 221, so as to achieve the following effect: Figure 6 In the state shown, the oil hole 223 at the left end of the column 221 is attached to the inner wall of the sealing cover 224, so that the tube cavity 222 of the column 221 cannot communicate with the outside, that is, the inlet end of the delivery hole 214 is blocked. This can achieve the following effects: first, it can prevent external dust from entering the annular hole 211, the first oil hole 212 and the second oil hole 213 from the delivery hole 214. Second, it can prevent the lubricating oil from flowing back after filling the lubricating oil.

[0043] When lubricating oil needs to be added, the sealing cover 224 can be rotated so that the oil inlet hole 225 on the sealing cover 224 is connected to the oil through hole 223 at the left end of the column 221, and then the oil nozzle is aligned with the oil inlet hole 225 to achieve the filling of lubricating oil.

[0044] Optional, such as Figure 6 As shown, a rubber plug 226 is installed in the oil inlet hole 225.

[0045] Embodiment 2:

[0046] The second embodiment of the present utility model provides a hand-cranked reducer, such as Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, the hand-cranked reducer includes the double-row tapered roller bearing 12 in the above-mentioned embodiment 1, and also includes a body 1, a worm 3, an output shaft 4, a worm wheel 401 and a hand-cranked transmission device 5 installed on the body 1; the body 1 is sequentially formed with an output cavity and an input cavity in order from high to low, the output cavity and the input cavity are arranged vertically, the worm 3 is coaxially arranged in the input cavity, the output shaft 4 is coaxially arranged in the output cavity, the worm wheel 401 is arranged on the output shaft 4 and is coaxially arranged with the output shaft 4, and the worm wheel 401 is meshed with the worm 3; one end of the worm 3 is provided with a first bevel gear 301, and the hand-cranked transmission device 5 includes a driving mechanism, a rotating shaft 507 and a rotating shaft 507 arranged at The second bevel gear 508 is on one end of the rotating shaft 507, and one end of the rotating shaft 507 is rotatably connected to the driving mechanism. A crank connecting hole is provided on the end surface of the rotating shaft 507 away from the second bevel gear 508. The driving mechanism is used to drive the rotating shaft 507 to move along the axial direction of the rotating shaft 507 so that the second bevel gear 508 is close to or away from the first bevel gear 301; when the driving mechanism drives the rotating shaft 507 to move to the first position, the first bevel gear 301 and the second bevel gear 508 are meshed; when the driving mechanism drives the rotating shaft 507 to move to the second position, the first bevel gear 301 and the second bevel gear 508 are disengaged.

[0047] In this embodiment, when power failure occurs, the input motor is first removed, and then the worker uses the driving mechanism to drive the rotating shaft 507 to drive the second bevel gear 508 to move in the direction close to the first bevel gear 301, until the second bevel gear 508 on the rotating shaft 507 is meshed with the first bevel gear 301 on the worm 3. At this time, the crank is inserted into the crank hole on the end face of the rotating shaft 507 and the crank is shaken to drive the rotating shaft 507 to rotate, thereby driving the first bevel gear 301 and the worm 3 to rotate, and the worm 3 rotates to drive the worm wheel 401 and the output shaft 4 to rotate, so that the reducer can be in a working state. When a call comes back, no manual drive is required. At this time, the driving mechanism can be used to drive the rotating shaft 507 to drive the second bevel gear 508 to move in the direction away from the first bevel gear 301, until the second bevel gear 508 on the rotating shaft 507 is disengaged from the first bevel gear 301 on the worm 3, and then the input motor can be reconnected to the worm 3.

[0048] It can be seen that in the present application, the worm gear reducer can be manually driven to work, and even if a power outage or failure occurs, workers can use manual operation to drive the reducer, which improves the adaptability of the worm gear reducer and its flexibility in use.

[0049] As a preferred embodiment, Figure 1 , Figure 2 and Figure 3As shown, the body 1 includes a base and an arc-shaped surrounding shell on the top of the base, an input cavity is formed in the base, and the left end of the input cavity has an opening, an output cavity is formed in the arc-shaped surrounding shell, and the axis of the output cavity is perpendicular to the axis of the input cavity, an output shaft 4 is rotatably mounted in the output cavity, and the front end of the output shaft 4 extends into the output cavity to form an input end, a worm gear 401 is coaxially arranged on the output shaft 4, and the lower half of the worm gear 401 extends into the input cavity of the base. Further, as Figure 1 As shown, a mounting hole is opened on the front side of the base, the mounting hole is perpendicular to the input cavity, and the mounting hole and the input cavity are connected, and the rotating shaft 507 passes through the mounting hole and extends into the input cavity.

[0050] Preferably, Figure 7 and Figure 8 As shown, the driving mechanism includes a fixed cover 501 and a screw-out member, the screw-out member includes a screw-out sleeve 503 and a screw-out seat 504, the fixed cover 501 is in a round cover shape, the screw-out seat 504 is in a circular ring shape, the screw-out sleeve 503 is in a circular tube shape, the fixed cover 501 is installed on the front of the base, and the fixed cover 501 is coaxially arranged with the mounting hole on the base. A circular hole is provided at the center of the fixed cover 501, the screw-out seat 504 is arranged inside the fixed cover 501 and is screwed with the inner wall of the fixed cover 501, one end of the screw-out sleeve 503 passes through the circular hole on the end face of the fixed cover 501 and extends into the inner wall of the fixed cover 501, and the end face of the screw-out sleeve 503 is fixedly connected to the side of the screw-out seat 504. Further, the rotating shaft 507 extends into the inside of the screw-out sleeve 503 and is rotatably connected with the screw-out sleeve 503.

[0051] It should be noted that if Figure 8 As shown, a crank connecting hole for use with a crank is provided on the end surface of the rotating shaft 507 away from the second bevel gear 508.

[0052] It should be noted that the rotating shaft 507 is perpendicular to the worm 3 , and the axis of the rotating shaft 507 and the axis of the worm 3 are coplanar.

[0053] In this way, when the power is off, the worker first removes the input motor, and then the worker rotates and unscrews the sleeve 503. Because the unscrew sleeve 503 and the unscrew seat 504 are fixed, and the unscrew seat 504 is screwed to the inner wall of the fixed cover 501, when the unscrew sleeve 503 is rotated, the unscrew sleeve 503 will move along the axial direction of the rotating shaft 507 together with the unscrew seat 504 and the rotating shaft 507, so that the second bevel gear 508 at the end of the rotating shaft 507 is close to the first bevel gear 301, until the second bevel gear 508 is meshed with the first bevel gear 301, and then the rotation of the unscrew sleeve 503 is stopped. Then the worker inserts one end of the crank into the crank connecting hole on the end face of the rotating shaft 507, and shakes the crank to drive the rotating shaft 507 to rotate. The second bevel gear 508 rotates with the rotation of the rotating shaft 507, thereby driving the first bevel gear 301 and the worm 3 to rotate. The worm 3 rotates to drive the worm wheel 401 and the output shaft 4 to rotate, so that the reducer can be in working state.

[0054] When a call comes in, no manual drive is required. At this time, the sleeve 503 can be rotated in the reverse direction, and the sleeve 503 drives the seat 504 and the rotating shaft 507 to move away from the first bevel gear 301, so that the second bevel gear 508 on the rotating shaft 507 is separated from the first bevel gear 301 on the worm 3, and finally the input motor is reconnected with the worm 3. It should be noted that the crank can be a Z-shaped crank commonly used on the market.

[0055] It can be seen that in this embodiment, the reducer can be driven to work by manual operation, and the reducer can be in working state even when the power is off, thereby improving the adaptability and flexibility of the reducer.

[0056] As a preferred embodiment, in order to facilitate the rotation and unscrewing of the sleeve 503, a rotating cover is screwed on the end of the unscrewing sleeve 503, and the rotating cover is in the shape of a round cover, and anti-slip protrusions are evenly arranged on the outer side of the rotating cover. In this way, the unscrewing sleeve 503 can be easily rotated and unscrewed.

[0057] Optionally, a plurality of fixing rods are provided on the side of the end of the unscrewing sleeve 503 exposed to the outside, and the plurality of fixing rods are evenly distributed around the axis of the unscrewing sleeve 503. In this way, the worker can hold the fixing rod to rotate the unscrewing sleeve 503, and the unscrewing sleeve 503 is more labor-saving.

[0058] Preferably, Figure 8As shown, multiple bolt holes are evenly provided around the mounting hole on the front side of the base of the machine body 1, and multiple countersunk holes corresponding to the bolt holes are evenly provided around the axis of the fixing cover 501. When installing the fixing cover 501, align the fixing cover 501 with the mounting hole on the base and fit the fixing cover 501 to the front side of the base, then rotate the fixing cover 501 so that the countersunk holes on the fixing cover 501 are aligned with the bolt holes on the front side of the base, and finally use the locking bolts 502 to fix the fixing cover 501. This facilitates the subsequent disassembly work and also facilitates the maintenance work.

[0059] Preferably, Figure 8 The screw-out seat 504 is in a circular ring shape, and an external thread is provided on the outer surface of the screw-out seat 504 . An internal thread groove is provided on the inner wall of one end of the fixed cover 501 close to the first bevel gear 301 , so that the screw-out seat 504 can be screwed with the fixed cover 501 .

[0060] In addition, considering that the service life of the external thread of the screw-out seat 504 will be reduced after long-term wear, it needs to be replaced. In order to facilitate the disassembly of the screw-out sleeve 503 and the screw-out seat 504, the screw-out sleeve 503 and the screw-out seat 504 are designed to be detachable.

[0061] Specifically, a flange is provided on the outer side of the end of the screw-out sleeve 503 close to the screw-out seat 504, and a plurality of bolt holes are evenly provided on the end face of the screw-out seat 504 facing the screw-out sleeve 503, and the bolt holes correspond to the flange holes on the flange. In this way, when connecting the screw-out sleeve 503 and the screw-out seat 504, it is only necessary to make the flange of the screw-out sleeve 503 fit with the end face of the screw-out seat 504 and make the flange holes on the flange align with the bolt holes on the screw-out seat 504, and finally use the fixing bolts 505 to fix the flange to the screw-out seat 504.

[0062] As a preferred embodiment, Figure 8 As shown, a connecting bearing 506 is provided on the inner wall of the screw-out seat 504, and an oil seal 510 is provided on the inner wall of the screw-out sleeve 503. The axes of the oil seal 510 and the connecting bearing 506 are collinear. The connecting bearing 506 supports the rotating shaft 507, and one end of the rotating shaft 507 away from the second bevel gear 508 passes through the oil seal 510.

[0063] Furthermore, an oil seal 509 is coaxially mounted on the inner wall of the circular hole at the center of the fixed cover 501 , and the oil seal 509 cooperates with the unscrewing sleeve 503 .

[0064] Preferably, Figure 1 and Figure 3As shown, there is an input port on the left side of the machine body 1, which is connected to the input cavity, and the motor flange 2 is fixedly installed at the input port and is coaxially arranged with the input port. A double-row tapered roller bearing 12 and a third bearing 13 are sequentially installed in the input cavity, and the double-row tapered roller bearing 12 and the third bearing 13 are symmetrically arranged about the input cavity. The two ends of the worm 3 pass through the double-row tapered roller bearing 12 and the third bearing 13 respectively, and the double-row tapered roller bearing 12 is close to the input port, and the third bearing 13 is far away from the input port. The worm 3 has a worm tooth surface 302 meshing with the worm wheel 401, and the worm tooth surface 302 is located between the double-row tapered roller bearing 12 and the third bearing 13, and the worm tooth surface 302 is meshing with the worm wheel 401.

[0065] Furthermore, a first bearing 7 is installed on the inner wall of the motor flange 2, and an adapter sleeve 6 is connected in the first bearing 7. One end of the adapter sleeve 6 is connected to one end of the worm 3, and the adapter sleeve 6 is used to connect to the input motor.

[0066] In this way, the input motor drives the adapter sleeve 6 to drive the worm 3 to rotate, and the rotation of the worm 3 drives the worm wheel 401 to rotate, and finally drives the output shaft 4 to rotate.

[0067] As a preferred embodiment, Figure 3 As shown, the first bevel gear 301 is installed at the right end of the worm 3 by a nut fastening mechanism, the nut fastening mechanism includes a first nut 15 and a second nut 16, and one end of the worm 3 for mounting the first bevel gear 301 is provided with a first thread and a second thread in sequence, the thread directions of the first thread and the second thread are opposite, the first nut 15 has an internal thread matching the first thread, the second nut 16 has an internal thread matching the second thread, and the nominal diameter of the first thread is greater than the nominal diameter of the second thread.

[0068] As a preferred embodiment, a first oil seal 10 and a second oil seal 14 are respectively sleeved on both ends of the worm 3, wherein the first oil seal 10 is located on the left side of the double-row tapered roller bearing 12, and the second oil seal 14 is located on the right side of the third bearing 13, so that the input cavity between the first oil seal 10 and the second oil seal 14 is in a sealed environment. It should be noted that the main function of the oil seal is to seal the oil, that is, to isolate the parts of the transmission parts that need to be lubricated from the external environment to prevent the leakage of lubricating oil, and at the same time prevent external dust, impurities, etc. from entering the machine, thereby ensuring the normal operation of the equipment and extending the service life of the equipment.

[0069] It should be noted that the motor flange 2 and the body 1 are connected through the bearing seat 9. Specifically, the bearing seat 9 includes a rectangular plate and a bearing sleeve. A circular hole is opened on the rectangular plate. One end of the bearing sleeve is fixed to the rectangular plate, and the bearing sleeve is coaxially arranged with the circular hole on the rectangular plate. A first circular hole is opened at the four corners of the rectangular plate. Four bolt holes are evenly arranged around the input port on the left side of the base. Further, four second circular holes are arranged on the end face of the motor flange 2 close to the bearing seat 9, and the first circular holes and the second circular holes correspond to each other one by one. When installing the motor flange 2, it is only necessary to insert the bearing sleeve of the bearing seat 9 into the input cavity. At this time, the four first circular holes on the bearing seat 9 are aligned with the four bolt holes on the left side of the base. Then, the motor flange 2 is attached to the rectangular plate of the bearing seat 9, and the four second circular holes on the motor flange 2 are aligned with the four first circular holes on the rectangular plate. Finally, the bolts are inserted into the second circular holes and tightened to fix the motor flange 2 and the bearing seat 9 to the body 1 together. This makes subsequent disassembly and maintenance work easier.

[0070] It should be noted that the double-row tapered roller bearing 12 in this embodiment is the double-row tapered roller bearing 12 in Embodiment 1, the worm 3 is matched and connected with the two inner ring bodies 18 in the double-row tapered roller bearing 12, and the outer ring body 21 in the double-row tapered roller bearing 12 is inserted into the bearing sleeve of the bearing seat 9.

[0071] Optional, such as Figure 3 As shown, in order to prevent the double-row tapered roller bearing 12 from deflecting, a protrusion is provided on the outer peripheral surface of the worm 3, and the right side of the double-row tapered roller bearing 12 contacts the protrusion, and a locking nut 11 is also screwed on the worm 3, and the locking nut 11 is located on the left side of the double-row tapered roller bearing 12. In this way, by tightening the locking nut 11, the locking nut 11 tightly presses against the double-row tapered roller bearing 12, so that the double-row tapered roller bearing 12 is limited between the protrusion and the locking nut 11.

[0072] Optionally, a retaining spring 8 is provided on the inner wall of the motor flange 2, the adapter sleeve 6 passes through the retaining spring 8, and the retaining spring 8 is attached to the left side surface of the first bearing 7. The retaining spring 8 serves to limit the adapter sleeve 6.

[0073] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0074] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-row tapered roller bearing for a hand-cranked reducer, the double-row tapered roller bearing being installed in the hand-cranked reducer and used for being matched and connected with a worm (3) in the hand-cranked reducer, characterized in that: It comprises an inner ring body (18), an outer ring body (21), a cage (19) and a plurality of tapered rollers (20); Two of the retaining frames (19) and the inner ring bodies (18) are provided, the retaining frames (19) and the inner ring bodies (18) correspond to each other one by one, the two inner ring bodies (18) are symmetrically mounted in the outer ring body (21), the retaining frames (19) are mounted on the corresponding inner ring bodies (18), and each retaining frame (19) is evenly mounted with a plurality of tapered rollers (20) around its axis; An annular hole (211) is provided inside the outer ring body (21), the annular hole (211) is coaxially arranged with the outer ring body (21), at least one conveying hole (214) is provided on the end surface of the outer ring body (21) along the axial direction of the outer ring body (21), and one end of the conveying hole (214) is connected to the annular hole (211); At least one first oil hole (212) and at least one second oil hole (213) are provided in the outer ring body (21); one end of the first oil hole (212) is connected to the annular hole (211), and the other end thereof points to one of the retaining frames (19); one end of the second oil hole (213) is connected to the annular hole (211), and the other end thereof points to another of the retaining frames (19).

2. A double-row tapered roller bearing for a hand-cranked reducer according to claim 1, characterized in that: The number of the first oil holes (212) and the second oil holes (213) is the same, and the first oil holes (212) and the second oil holes (213) correspond one to one, and the first oil holes (212) and the corresponding second oil holes (213) are distributed in a V-shaped pattern.

3. A double-row tapered roller bearing for a hand-cranked reducer according to claim 1, characterized in that: A plurality of the delivery holes (214) are provided, and the plurality of the delivery holes (214) are evenly distributed around the axis of the outer ring body (21).

4. A double-row tapered roller bearing for a hand-cranked reducer according to claim 1 or 3, characterized in that: A blocking member (22) is installed at the inlet end of each delivery hole (214), and the blocking member (22) is used to control the on-off of the delivery hole (214).

5. A double-row tapered roller bearing for a hand-cranked reducer according to claim 4, characterized in that: The blocking member (22) comprises a column (221) and a sealing cover (224); the column (221) is sealingly mounted at the inlet end of the delivery hole (214); a first end of the column (221) is provided with a lumen (222) along its axial direction; the lumen (222) is communicated with the delivery hole (214); a second end of the column (221) is provided with an oil through hole (223); the axis of the oil through hole (223) is not colinear with the axis of the lumen (222); and the oil through hole (223) is communicated with the lumen (222); The sealing cover (224) is threadedly connected to the second end of the column (221); an oil inlet hole (225) is provided on the sealing cover (224) along its axial direction; the axis of the oil inlet hole (225) is not colinear with the axis of the sealing cover (224); When the sealing cover (224) rotates to a first state, the oil inlet hole (225) and the oil through hole (223) are connected, and when the sealing cover (224) rotates to a second state, the oil inlet hole (225) and the oil through hole (223) are staggered.

6. A double-row tapered roller bearing for a hand-cranked reducer according to claim 5, characterized in that: A rubber plug (226) is installed in the oil inlet hole (225).

7. A double-row tapered roller bearing for a hand-cranked reducer according to claim 5, characterized in that: An external thread is provided on the outer wall of the second end of the column (221), and an internal thread groove is provided on the inner wall of the sealing cover (224).

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