Speed reducer

Abstract

The utility model discloses a speed reducer which comprises a first-stage reduction gearbox and a second-stage reduction gearbox which are connected, an input shaft and a first transmission shaft are rotatably connected in the first-stage reduction gearbox, the input shaft is perpendicular to the first transmission shaft, the input shaft comprises a first worm, a first worm gear is installed on the first transmission shaft, and the first worm is meshed with the first worm gear. One end of the input shaft penetrates out of the first-stage reduction gearbox, an output shaft and a second transmission shaft are rotationally arranged in the second-stage reduction gearbox, the second transmission shaft is perpendicular to the output shaft and comprises a second worm, a second worm gear is installed on the output shaft, the second worm is meshed with the second worm gear, and the first transmission shaft and the second transmission shaft are connected through a connecting piece. The transmission shaft I and the transmission shaft II can be stably transmitted, so that stable speed reduction output is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of speed reduction equipment, more particularly to a speed reducer. BACKGROUND

[0002] The reducer is an independent component composed of gear transmission, worm transmission and gear-worm transmission closed in a rigid shell, and is used as a speed reduction transmission device between a prime mover and a working machine. When the transmission ratio is too large, a single speed reduction structure is adopted, and the structure is large, which is not convenient for use and transportation. SUMMARY

[0003] The utility model discloses a speed reducer which overcomes the defects of the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The utility model discloses a speed reducer, including the first -stage reduction gearbox and the second -stage reduction gearbox who are connected, the first -stage reduction gearbox is rotatably connected with input shaft and transmission shaft no.

[0006] Further, the connecting piece includes a connecting shaft connected to the end of the transmission shaft, the transmission sleeve is keyed connected to the connecting shaft, the transmission sleeve is provided with a limiting groove two on the end close to the transmission shaft two, the end of the transmission shaft two is connected with the transmission gear two, and the transmission gear two is arranged in the limiting groove two.

[0007] Further, the side close to the second -stage reduction gearbox of the first -stage reduction gearbox is connected with the mounting sleeve no.

[0008] Further, the inner wall of the first -stage reduction gearbox is provided with a mounting groove one, the bearing one includes a bearing outer ring one, a bearing inner ring one and a ball, the bearing outer ring one is mounted in the mounting groove one, the transmission shaft one is provided with a baffle ring, the baffle ring is located between the bearing inner ring one and the worm wheel one, and the outer diameter of the baffle ring is greater than the inner diameter of the bearing inner ring one and less than the outer diameter of the bearing inner ring one.

[0009] Further, the first reduction gearbox is provided with a mounting seat on the side wall close to the second reduction gearbox, the mounting seat is provided with a mounting groove two close to one side of the worm gear one, the bearing two comprises a bearing outer ring two, a bearing inner ring two and balls two, the bearing outer ring two is mounted in the mounting groove two, the worm gear one comprises a reduced diameter section, the reduced diameter section is located on the side of the worm gear one close to the bearing two, and the reduced diameter section abuts against the end face of the bearing inner ring two.

[0010] Further, the first reduction gearbox is provided with a mounting seat on the side wall close to the second reduction gearbox, the mounting seat is provided with a mounting groove two close to one side of the worm gear one, the bearing two comprises a bearing outer ring two, a bearing inner ring two and balls two, the bearing outer ring two is mounted in the mounting groove two, the worm gear one comprises a reduced diameter section, the reduced diameter section is located on the side of the worm gear one close to the bearing two, and the reduced diameter section abuts against the end face of the bearing inner ring two.

[0011] Further, the first reduction gearbox is provided with a mounting seat on the side wall close to the second reduction gearbox, the mounting seat is provided with a mounting groove two close to one side of the worm gear one, the bearing two comprises a bearing outer ring two, a bearing inner ring two and balls two, the bearing outer ring two is mounted in the mounting groove two, the worm gear one comprises a reduced diameter section, the reduced diameter section is located on the side of the worm gear one close to the bearing two, and the reduced diameter section abuts against the end face of the bearing inner ring two.

[0012] Further, the first reduction gearbox is provided with a mounting seat on the side wall close to the second reduction gearbox, the mounting seat is provided with a mounting groove two close to one side of the worm gear one, the bearing two comprises a bearing outer ring two, a bearing inner ring two and balls two, the bearing outer ring two is mounted in the mounting groove two, the worm gear one comprises a reduced diameter section, the reduced diameter section is located on the side of the worm gear one close to the bearing two, and the reduced diameter section abuts against the end face of the bearing inner ring two.

[0013] Further, the first reduction gearbox is provided with a mounting seat on the side wall close to the second reduction gearbox, the mounting seat is provided with a mounting groove two close to one side of the worm gear one, the bearing two comprises a bearing outer ring two, a bearing inner ring two and balls two, the bearing outer ring two is mounted in the mounting groove two, the worm gear one comprises a reduced diameter section, the reduced diameter section is located on the side of the worm gear one close to the bearing two, and the reduced diameter section abuts against the end face of the bearing inner ring two.

[0014] Further, the first reduction gearbox is provided with a mounting seat on the side wall close to the second reduction gearbox, the mounting seat is provided with a mounting groove two close to one side of the worm gear one, the bearing two comprises a bearing outer ring two, a bearing inner ring two and balls two, the bearing outer ring two is mounted in the mounting groove two, the worm gear one comprises a reduced diameter section, the reduced diameter section is located on the side of the worm gear one close to the bearing two, and the reduced diameter section abuts against the end face of the bearing inner ring two.

[0015] The utility model discloses the beneficial effect is: effectively support transmission shaft one and transmission shaft two, make transmission shaft one and transmission shaft two keep stable when rotating, thereby realize the stable transmission between input shaft and output shaft. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the speed reducer in the embodiment;

[0017] Figure 2 It is the sectional view of the first reduction gearbox in the embodiment;

[0018] Figure 3 It is Figure 1 It is the enlarged schematic diagram of A in the middle;

[0019] Figure 4 It is Figure 1 It is the enlarged schematic diagram of B in the middle;

[0020] Figure 5 For Figure 1 Enlarged view at C.

[0021] Reference: 1, primary reduction box; 2, secondary reduction box; 3, input shaft; 4, worm one; 5, limit cone one; 6, bearing three; 7, connecting seat; 8, connecting sleeve; 9, drive gear one; 10, limit groove one; 11, mounting hole; 12, keyway; 13, drive shaft one; 14, worm one; 15, bearing one; 16, bearing two; 17, drive sleeve; 18, retaining ring; 19, mounting sleeve one; 20, mounting sleeve two; 21, bearing four; 22, drive shaft two; 23, worm two; 24, oil injection hole; 25, limit cone two; 26, output shaft; 27, worm two; 28, mounting groove one; 29, bearing outer ring one; 30, bearing inner ring one; 31, ball one; 32, mounting seat; 33, mounting groove two; 34, bearing outer ring two; 35, bearing inner ring two; 36, ball two; 37, sealing groove; 38, sealing ring; 39, drive gear two; 40, connecting shaft; 41, limit groove two. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0023] As Figures 1-5 shown, a speed reducer comprises a primary reduction box 1 and a secondary reduction box 2, the primary reduction box 1 is installed with a bearing two 16 on the inner wall close to one side of the secondary reduction box 2, a bearing one 15 is installed on the side wall opposite to the bearing two 16, the bearing one 15 and the bearing two 16 are rotationally installed with a drive shaft one 13, the drive shaft one 13 is keyed with a worm one 14, an input shaft 3 is installed in the primary reduction box 1, the input shaft 3 is perpendicular to the drive shaft one 13, the primary reduction box 1 is installed with a bearing three 6 corresponding to the positions at both ends of the input shaft 3, both ends of the input shaft 3 are installed in the bearing three 6. The bearing three 6 can effectively support the input shaft 3, so that the input shaft 3 rotates stably.

[0024] As Figure 2As shown, the input shaft 3 includes a worm 4, and a worm gear 14 is keyed on the transmission shaft 1, and the worm 4 is engaged with the worm gear 14. The input shaft 3 is provided with a limiting cone 5 near the bearing 6, and the diameter of the end of the limiting cone 5 near the bearing 6 is larger than the diameter of the end of the limiting cone 5 away from the bearing 6. The end of the limiting cone 5 near the bearing 6 abuts against the inner ring of the bearing 6, thereby limiting the axial direction of the input shaft 3, avoiding the movement of the worm 4 along the axial direction of the input shaft 3, and enabling the worm 4 to maintain good engagement with the worm gear 14. The diameter of the limiting cone 5 gradually decreases, so that the limiting cone 5 does not interfere with the worm gear 14, and the limiting cone 5 does not affect the rotation of the worm gear 14. The speed reduction is achieved through the cooperation of the worm 4 and the worm gear 14.

[0025] The end of the input shaft 3 penetrates out of the first speed reducer 1. The first speed reducer 1 is provided with a connecting seat 7 corresponding to the position of the end of the input shaft 3 penetrating out of the first speed reducer 1, and the connecting seat 7 is used to connect with the housing of the external driving mechanism. The connecting seat 7 is provided with a connecting sleeve 8, and the connecting sleeve 8 is provided with a limiting groove 10 near the end of the input shaft 3. The end of the input shaft 3 penetrating out of the first speed reducer 1 is connected with a transmission gear 9, and the transmission gear 9 is clamped into the limiting groove 10. The transmission between the input shaft 3 and the connecting sleeve 8 is achieved through the cooperation of the transmission gear 9 and the limiting groove 10. The end of the connecting sleeve 8 away from the input shaft 3 is provided with a mounting hole 11, and the inner wall of the connecting sleeve 8 is provided with a key groove 12 connected with the mounting hole 11. The power shaft of the external driving mechanism can be inserted into the mounting hole 11, and fixed through the cooperation of the key and the key groove 12, thereby completing the input of power.

[0026] As shown in the figure, Figure 3 The bearing 15 includes a bearing outer ring 29, a bearing inner ring 30, and a plurality of rolling balls 31 installed between the bearing outer ring 29 and the bearing inner ring 30 through a retainer. The inner wall of the first speed reducer 1 is provided with a mounting groove 28, and the bearing outer ring 29 is installed in the mounting groove 28. The transmission shaft 1 is provided with a stop ring 18 abutting against the bearing inner ring 30. The mounting groove 28 and the stop ring 18 are respectively located on the two sides of the bearing 15, and the cooperation of the two completes the limiting installation of the bearing 15. The worm gear 14 is sleeved on the transmission shaft 1 away from the bearing 15 and is connected through a key, and one end of the worm gear 14 abuts against the side surface of the stop ring 18.

[0027] As shown in the figure, Figure 4As shown, the bearing two 16 comprises a bearing outer ring two 34, a bearing inner ring two 35 and a ball two 36 mounted between the bearing outer ring two 34 and the bearing inner ring two 35 through a retainer. The mounting seat 32 is inserted and mounted on the side wall opposite to the bearing one 15 of the primary reduction box 1, the mounting seat 32 is provided with a mounting groove two 33 towards one side in the primary reduction box 1, the bearing outer ring two 34 is mounted in the mounting groove two 33, the worm wheel one 14 is reduced in diameter on the side close to the bearing two 16 to form a reduced diameter section, the reduced diameter section can only abut against the end face of the bearing inner ring two 35. The cooperation of the worm wheel one 14 and the mounting groove two 33 realizes the limiting installation of the bearing two 16. At the same time, the limiting of the worm wheel one 14 is also formed relatively, so that the worm wheel one 14 can keep meshing with the worm one 4.

[0028] The bearing four 21 is mounted on the opposite two inner walls in the secondary reduction box 2, the transmission shaft two 22 is rotatably arranged in the two bearings four 21, the transmission shaft two 22 comprises a worm two 23. The output shaft 26 is also rotatably arranged in the primary reduction box 1, the output shaft 26 is keyed connected with the worm wheel two 27, the worm wheel two 27 is meshed with the worm two 23, the secondary reduction is realized through the cooperation of the worm wheel two 27 and the worm two 23, and the reduction output is realized from the output shaft 26. The limiting cone two 25 is mounted at the position of the transmission shaft two 22 close to the bearing four 21, the diameter of the end of the limiting cone two 25 close to the bearing four 21 is greater than the diameter of the end away from the bearing four 21. The limiting of the transmission shaft two 22 in the axial direction is realized through the abutment of the limiting cone two 25 against the bearing four 21, the axial movement of the worm two 23 is limited, so that the worm two 23 keeps meshing with the worm wheel two 27.

[0029] One end of the transmission shaft two 22 penetrates out of the secondary reduction box 2, one end of the transmission shaft one 13 penetrates out of the primary reduction box 1 and is connected with the connecting shaft 40, the connecting shaft 40 and the end of the transmission shaft two 22 are fixed through a connecting piece. The connecting piece comprises a transmission sleeve 17, the transmission sleeve 17 is keyed connected on the connecting shaft 40, the limiting groove two 41 is formed in one end of the transmission sleeve 17 close to the transmission shaft two 22, the end of the transmission shaft two 22 is connected with the transmission gear two 39, the transmission gear two 39 is arranged in the limiting groove two 41, the transmission between the transmission shaft one 13 and the transmission shaft two 22 is completed through the cooperation of the transmission gear two 39 and the limiting groove two 41.

[0030] The corresponding sealing structure needs to be arranged at the connecting piece, the sealing structure comprises a mounting sleeve one 19 mounted on the primary reduction box 1 and a mounting sleeve two 20 mounted on the secondary reduction box 2, the ends close to each other of the mounting sleeve one 19 and the mounting sleeve two 20 are connected, the connecting piece is located in the area surrounded by the mounting sleeve one 19 and the mounting sleeve two 20, so as to be isolated from the outside, thereby reducing the influence of external factors.

[0031] The first-stage reduction gearbox 1 is provided with a sealing groove 37 at a position corresponding to the mounting seat 32, and a sealing ring 38 is mounted in the sealing groove 37 and abuts against the inner wall of the sealing groove 37 and the outer periphery of the mounting seat 32, so that the sealing between the mounting seat 32 and the first-stage reduction gearbox 1 is realized through the sealing ring 38.

[0032] The second-stage reduction gearbox 2 is provided with an oil injection hole 24, and lubricating oil can be added at the oil injection hole 24.

[0033] The preferred embodiments of the present application are described above, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical scheme falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application are also considered to be within the protection scope of the present application.

Claims

1. A speed reducer characterized by, The utility model provides a kind of two-stage reduction gearbox, including the connection of primary reduction gearbox (1) and secondary reduction gearbox (2), the input shaft (3) and transmission shaft one (13) are rotatably connected in the primary reduction gearbox (1), the input shaft (3) and transmission shaft one (13) are perpendicular, the input shaft (3) includes worm one (4), transmission shaft one (13) is installed with worm gear one (14), worm one (4) and worm gear one (14) are engaged, one end of the input shaft (3) is out of primary reduction gearbox (1), the output shaft (26) and transmission shaft two (22) are rotatably arranged in the secondary reduction gearbox (2), transmission shaft two (22) and output shaft (26) are perpendicular, transmission shaft two (22) includes worm two (23), output shaft (26) is installed with worm gear two (27), worm two (23) and worm gear two (27) are engaged, transmission shaft one (13) is out of primary reduction gearbox (1) and is set to one end of secondary reduction gearbox (2), transmission shaft two (22) is set to one end of primary reduction gearbox (1) and is out of secondary reduction gearbox (2), transmission shaft one (13) and transmission shaft two (22) are connected by connecting piece, bearing one (15) and bearing two (16) are installed in the primary reduction gearbox (1), transmission shaft one (13) is rotatably arranged in bearing one (15) and bearing two (16).

2. The speed reducer according to claim 1, wherein The connecting piece includes connecting shaft (40) connected to the end of transmission shaft one (13), the transmission sleeve (17) is keyed to the connecting shaft (40), the transmission sleeve (17) is provided with a limiting groove two (41) at one end close to the transmission shaft two (22), the end of the transmission shaft two (22) is connected with a transmission gear two (39), and the transmission gear two (39) is arranged in the limiting groove two (41).

3. The speed reducer according to claim 1 or 2, characterized in that, The side of the primary reduction gearbox (1) close to the secondary reduction gearbox (2) is connected with a mounting sleeve one (19), the side of the secondary reduction gearbox (2) close to the primary reduction gearbox (1) is connected with a mounting sleeve two (20), and the opposite sides of the mounting sleeve one (19) and the mounting sleeve two (20) are connected.

4. The speed reducer according to claim 1, wherein The inner wall of the primary reduction gearbox (1) is provided with a mounting groove one (28), the bearing one (15) includes a bearing outer ring one (29), a bearing inner ring one (30) and a ball one (31), the bearing outer ring one (29) is installed in the mounting groove one (28), the transmission shaft one (13) is provided with a stop ring (18), the stop ring (18) is located between the bearing inner ring one (30) and the worm gear one (14), the outer diameter of the stop ring (18) is greater than the inner diameter of the bearing inner ring one (30) and less than the outer diameter of the bearing inner ring one (30).

5. The speed reducer according to claim 4, wherein The primary reduction gearbox (1) is installed with a mounting seat (32) on the side wall close to the secondary reduction gearbox (2), the mounting seat (32) is opened with a mounting groove two (33) on the side close to the worm gear one (14), the bearing two (16) comprises a bearing outer ring two (34), a bearing inner ring two (35) and a ball two (36), the bearing outer ring two (34) is installed in the mounting groove two (33), the worm gear one (14) comprises a reduced diameter section, the reduced diameter section is located on the side of the worm gear one (14) close to the bearing two (16), and the reduced diameter section abuts against the end face of the bearing inner ring two (35).

6. The speed reducer according to claim 5, wherein The primary reduction gearbox (1) is opened with a sealing groove (37) at the position corresponding to the outer periphery of the mounting seat (32), and the sealing groove (37) is installed with a sealing ring (38).

7. The speed reducer according to claim 1, wherein The opposite two sides of the primary reduction gearbox (1) are installed with bearings three (6), both ends of the input shaft (3) are rotatably arranged in the bearings three (6), the input shaft (3) is provided with a limiting cone one (5), one end of the limiting cone one (5) abuts against the bearing three (6), and the diameter of the limiting cone one (5) close to one end of the bearing three (6) is greater than the diameter of the limiting cone one (5) away from one end of the bearing three (6).

8. The speed reducer according to claim 1, wherein The primary reduction gearbox (1) is installed with a connecting seat (7) on the side corresponding to the input shaft (3) passing out, the connecting seat (7) is provided with a connecting sleeve (8), the connecting sleeve (8) is opened with a limiting groove one (10) on the side close to the input shaft (3), the input shaft (3) is connected with a transmission gear one (9), and the transmission gear one (9) is arranged in the limiting groove one (10).

9. The speed reducer according to claim 8, wherein The end of the connecting sleeve (8) away from the limiting groove one (10) is opened with a mounting hole (11), the inner wall of the connecting sleeve (8) corresponding to the mounting hole (11) is opened with a key groove (12), and the key groove (12) is in communication with the mounting hole (11).

10. The speed reducer according to claim 1, characterized by The opposite two sides of the secondary reduction gearbox (2) are installed with bearings four (21), both ends of the transmission shaft two (22) are rotatably arranged in the bearings four (21), the transmission shaft two (22) is provided with a limiting cone two (25), one end of the limiting cone two (25) abuts against the bearing four (21), and the diameter of the limiting cone two (25) close to one end of the bearing four (21) is greater than the diameter of the limiting cone two (25) away from one end of the bearing four (21).

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