Gearbox for a small machine tool

Abstract

This utility model provides a gearbox for a small machine tool, comprising: a spindle box with a hollow gear chamber inside; an input group passing through the left or right side of the spindle box and entering the gear chamber through the outer wall of the spindle box; a transmission group passing through the gear chamber on the side near the input group, meshing with the input group; and an output group passing through the spindle box on the side of the transmission group away from the input group, meshing with the transmission group. During operation, the input shaft in the input group is driven to rotate by a drive motor, causing the helical input gear on the input shaft to drive the bevel-shaped driven gear with a larger outer diameter in the transmission group, thus rotating the transmission shaft to complete the first stage of speed reduction. Then, the transmission gear drives the output gear with a larger outer diameter in the output group to drive the output shaft to rotate, completing the second stage of speed reduction. The spindle box is filled with lubricating oil, and sealing is achieved through the design of cover plates and sealing rings in each group. The connection between the modules and the spindle box is all by bolts, making disassembly during maintenance relatively simple.

Description

Technical Field

[0001] This utility model relates to the field of modular design of machine tools, and in particular to the field of gearbox design technology, specifically a gearbox for a small machine tool. Background Technology

[0002] The gearbox of existing small and simple machine tools (such as bench lathes, drilling and milling machines, grinding machines, etc.) is the core component for realizing power transmission, speed regulation and motion conversion.

[0003] Small and simple machine tool technology closely revolves around the needs of miniaturization, low cost, and practicality of machine tools. It also adapts to the power characteristics of small machine tools and the load requirements of simple machining. Existing traditional, large, or precision lathe gearboxes have relatively complex structures, high manufacturing costs, and complex disassembly for maintenance. Users lack professional maintenance capabilities, resulting in low maintenance efficiency. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a gearbox for a small machine tool to solve the difficulties of the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a gearbox for a small machine tool, comprising:

[0006] The spindle box 1 has a hollow gear chamber 16 inside. The spindle box 1 includes an upper housing 11 and a lower housing 13. An mounting ring platform 14 is provided on the outer side of one end of the upper housing 11 and the lower housing 13 that are close to each other. Mounting screws 15 are spaced through the mounting ring platform 14. An oil extraction port 12 is opened on the top of the upper housing 11.

[0007] Input group 2, which is installed on the left or right side of the spindle box 1, and enters the gear chamber 16 through the outer wall of the spindle box 1;

[0008] The transmission group 3 is installed in the gear chamber 16 on the side near the input group 2. The left and right sides of the transmission group 3 are engaged in the front and rear side walls of the spindle box 1. The transmission group 3 meshes with the input group 2 for transmission.

[0009] Output group 4 is installed in the center of the spindle box 1 on the side of the transmission group 3 away from the input group 2. The left and right sides of the output group 4 are engaged in the front and rear side walls of the spindle box 1. The output group 4 and the transmission group 3 are meshed and driven together.

[0010] According to the preferred scheme, input group 2 includes:

[0011] A bushing 21 is bolted to the center of the left or right side wall of the spindle box 1, and a bearing 22 is fitted on the left and right sides of the bushing 21.

[0012] An input shaft 23 is inserted through the center of the shaft sleeve 21. One side of the input shaft 23 passes through the side wall of the main shaft box 1 and enters the gear chamber 16. The outer side wall of the input shaft 23 is interference-fitted with the first bearing 22. An input gear 24 is provided on the outer side of the input shaft 23 on one side inside the gear chamber 16, and a spline is provided on the outer side of the input shaft 23 on the other side.

[0013] The sleeve cover 25 is fitted outside the input shaft 23 and located on the side of the shaft sleeve 21 away from the main spindle box 1. The sleeve cover 25 is connected to the shaft sleeve 21 by bolts around its perimeter. A first sealing ring 26 is fitted in the center of the sleeve cover 25 near the shaft sleeve 21. The first sealing ring 26 is fitted outside the input shaft 23.

[0014] According to the preferred embodiment, the input shaft 23 is connected to the drive motor via a spline on the side away from the spindle box 1.

[0015] According to a preferred embodiment, the input gear 24 is a helical gear.

[0016] According to the preferred embodiment, transmission group 3 includes:

[0017] The transmission shaft 31 is disposed in the gear chamber 16 on the side near the input shaft 23, and the left and right sides of the transmission shaft 31 pass through the front and rear side walls of the main shaft box 1.

[0018] The second bearing 32 is interference-fitted and mounted on the left and right sides of the transmission shaft 31. The second bearing 32 is also engaged at the connection between the upper housing 11 and the lower housing 13.

[0019] The first bearing cover plate 33 is abutted against the left and right ends of the second bearing 32. The first bearing cover plate 33 is connected to the main spindle box 1 by bolts. A second sealing ring 34 is provided between the first bearing cover plate 33 and the second bearing 32.

[0020] A bevel-shaped driven gear 35 is mounted in the center of the transmission shaft 31 and meshes with the input gear 24;

[0021] The transmission gear 36 is mounted on one side of the transmission shaft 31.

[0022] According to the preferred scheme, output group 4 includes:

[0023] The output shaft 41 is located in the gear chamber 16 on the side of the transmission shaft 31 away from the input shaft 23. The left side of the output shaft 41 passes through the front side wall of the spindle box 1, and the right side of the output shaft 41 extends outward through the rear side wall of the spindle box 1. The outer side of the right side of the output shaft 41 is a spline.

[0024] The No. 3 bearing 42 is interference-fitted and mounted on the left and right sides of the output shaft 41. The No. 3 bearing 42 is also engaged at the connection between the upper housing 11 and the lower housing 13.

[0025] The No. 2 bearing cover plate 43 and the bearing pressure plate 44 are provided. The No. 2 bearing cover plate 43 is abutted against the left end of the output shaft 41, and the bearing pressure plate 44 is fitted on the right side of the output shaft 41. The No. 2 bearing cover plate 43 and the bearing pressure plate 44 are connected to the spindle box 1 by bolts. A No. 3 sealing ring 45 is provided between the No. 2 bearing cover plate 43 and the bearing pressure plate 44 and the No. 3 bearing 42.

[0026] Output gear 46 is mounted on one side of output shaft 41 and meshes with transmission gear 36.

[0027] According to the preferred embodiment, the maximum outer diameter of the input gear 24 is smaller than the outer diameter of the bevel driven gear 35, which is smaller than the outer diameter of the output gear 46.

[0028] This invention employs a spindle box, input group, transmission group, and output group. During operation, the input shaft in the input group is driven by a motor to rotate, causing the helical gear on the input shaft to drive the bevel gear with a larger outer diameter in the transmission group, thus rotating the transmission shaft and completing the first stage of speed reduction. Then, the transmission gear drives the output gear with a larger outer diameter in the output group to rotate the output shaft, completing the second stage of speed reduction. The spindle box is filled with lubricating oil, and sealing is achieved through the design of cover plates and sealing rings in each group. The spindle box, input group, transmission group, and output group are all connected by bolts, making disassembly and maintenance relatively simple.

[0029] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description

[0030] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0031] Figure 2 The diagram shown is a three-dimensional structural schematic of the spindle box in this utility model.

[0032] Figure 3 This is an assembly diagram of the input group, transmission group, and output group in the spindle box according to this utility model.

[0033] Figure 4 The diagram shown is an explosion diagram of the input group in this utility model.

[0034] Figure 5 The image shown is a burst diagram of the transmission assembly in this utility model.

[0035] Figure 6 The diagram shown is a burst diagram of the output group in this utility model.

[0036] Label Explanation

[0037] 1. Spindle box;

[0038] 11. Upper housing; 12. Oil sucker port; 13. Lower housing; 14. Mounting ring platform; 15. Mounting screw; 16. Gear chamber;

[0039] 2. Input group;

[0040] 21. Shaft sleeve; 22. Bearing No. 1; 23. Input shaft; 24. Input gear; 25. Sleeve cover; 26. Sealing ring No. 1;

[0041] 3. Transmission assembly;

[0042] 31. Drive shaft; 32. Bearing No. 2; 33. Bearing No. 1 cover plate; 34. Sealing ring No. 2; 35. Bevel driven gear; 36. Drive gear;

[0043] 4. Output group;

[0044] 41. Output shaft; 42. Bearing No. 3; 43. Bearing No. 2 cover plate; 44. Bearing pressure plate; 45. Sealing ring No. 3; 46. Output gear; Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0046] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0047] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0048] This utility model proposes a gearbox for a small machine tool, used in the modular design of machine tools. Generally, the gearbox for the small machine tool proposed in this utility model mainly includes: a spindle box 1, an input group 2, a transmission group 3, and an output group 4. See also... Figure 1 It shows the arrangement of the spindle box 1, input group 2, transmission group 3 and output group 4.

[0049] This utility model proposes a gearbox for a small machine tool. During operation, the input shaft 23 in the input group 2 is driven to rotate by a drive motor, causing the helical gear 24 on the input shaft 23 to drive the bevel-shaped driven gear 35 with a larger outer diameter in the transmission group 3, thus rotating the transmission shaft 31 to complete the first stage of reduction. Then, the transmission gear 36 drives the output gear 46 with a larger outer diameter in the output group 4 to drive the output shaft 41 to rotate, thus completing the second stage of reduction. The spindle box 1 is filled with lubricating oil, and the design of the cover plates and sealing rings in each group achieves sealing. Furthermore, the spindle box 1, input group 2, transmission group 3, and output group 4 are all connected by bolts, making disassembly and maintenance relatively simple.

[0050] Based on this, preferably, the spindle box 1 has a hollow gear chamber 16 inside. The spindle box 1 includes an upper housing 11 and a lower housing 13. An mounting ring 14 is provided on the outer side of the upper housing 11 and the lower housing 13 that are close to each other. Mounting screws 15 are spaced through the mounting ring 14. An oil extraction port 12 is opened on the top of the upper housing 11. It should be noted that the oil extraction port 12 can be used to extract the lubricating oil in the gearbox during gearbox maintenance. After maintenance, after the spindle box 1 is assembled, lubricating oil is slowly injected into the gear chamber 16. It should be noted that there is no leakage when the lubricating oil level is between the upper and lower housings or at the position of the cylinder cover 25 and the bearing cover. If there is lubricating oil leakage, the lubricating oil should be extracted in time. Disassemble and check whether the sealing ring is installed in place and whether the sealing ring needs to be replaced.

[0051] Preferably, an input assembly 2 is installed on the left or right side of the spindle box 1. The input assembly 2 passes through the outer wall of the spindle box 1 and enters the gear chamber 16. The input assembly 2 includes: a sleeve 21, an input shaft 23, an input gear 24, a sleeve cover 25, and a first sealing ring 26. The sleeve 21 is bolted to the center of the left or right side wall of the spindle box 1. A first bearing 22 is installed on both sides of the sleeve 21. The input shaft 23 passes through the center of the sleeve 21. One side of the input shaft 23 passes through the side wall of the spindle box 1 and enters the gear chamber 16. The outer wall of the input shaft 23 is press-fitted with the first bearing 22 and is located in the gear chamber 16. An input gear 24 is provided on the outer side of the input shaft 23 on one side of the gear chamber 16, and a spline is provided on the outer side of the input shaft 23 on the other side. The side of the input shaft 23 away from the main spindle box 1 is connected to the drive motor through the spline. The sleeve cover 25 is fitted on the outside of the input shaft 23 and is located on the side of the shaft sleeve 21 away from the main spindle box 1. The sleeve cover 25 is connected to the shaft sleeve 21 around the perimeter by bolts. A first sealing ring 26 is fitted in the center of the side of the sleeve cover 25 near the shaft sleeve 21. The first sealing ring 26 is fitted on the outside of the input shaft 23. It should be noted that the input gear 24 is a helical gear, which can drive the large gear with a small force, so that the output shaft speed is slower and a better speed ratio is achieved.

[0052] Preferably, the transmission assembly 3 passes through the gear chamber 16 on the side near the input assembly 2. The left and right sides of the transmission assembly 3 are engaged in the front and rear side walls of the spindle box 1. The transmission assembly 3 meshes with the input assembly 2. The transmission assembly 3 includes: a transmission shaft 31, a second bearing 32, a first bearing cover plate 33, a bevel-shaped driven gear 35, and a transmission gear 36. The transmission shaft 31 is located in the gear chamber 16 on the side near the input shaft 23. The left and right sides of the transmission shaft 31 pass through the front and rear side walls of the spindle box 1. The left and right sides of the drive shaft 31 are fitted with the No. 2 bearing 32 with an interference fit. The No. 2 bearing 32 is locked at the connection between the upper housing 11 and the lower housing 13. The No. 1 bearing cover plate 33 is abutted against the left and right ends of the No. 2 bearing 32. The No. 1 bearing cover plate 33 is connected to the spindle box 1 by bolts. The No. 2 sealing ring 34 is provided between the No. 1 bearing cover plate 33 and the No. 2 bearing 32. The bevel driven gear 35 is fitted in the center of the drive shaft 31. The bevel driven gear 35 meshes with the input gear 24. The transmission gear 36 is fitted on one side of the drive shaft 31.

[0053] Preferably, the output group 4 is located in the center of the spindle box 1, on the side of the transmission group 3 away from the input group 2. The left and right sides of the output group 4 are engaged in the front and rear side walls of the spindle box 1. The output group 4 meshes with the transmission group 3. The output group 4 includes: an output shaft 41, a third bearing 42, a second bearing cover plate 43, a bearing pressure plate 44, and an output gear 46. The output shaft 41 is located in the gear chamber 16 on the side of the transmission shaft 31 away from the input shaft 23. The left side of the output shaft 41 passes through the front side wall of the spindle box 1, and the right side of the output shaft 41 extends outward through the rear side wall of the spindle box 1. The right outer side of 41 has a spline for easy installation of chucks and other fixtures. The No. 3 bearing 42 is interference-fitted and installed on the left and right sides of the output shaft 41. The No. 3 bearing 42 is clamped at the connection between the upper housing 11 and the lower housing 13. The No. 2 bearing cover plate 43 abuts against the left end of the output shaft 41. The bearing pressure plate 44 is installed on the right side of the output shaft 41. The No. 2 bearing cover plate 43 and the bearing pressure plate 44 are connected to the spindle box 1 by bolts. The No. 3 sealing ring 45 is provided between the No. 2 bearing cover plate 43 and the bearing pressure plate 44 and the No. 3 bearing 42. The output gear 46 is installed on one side of the output shaft 41 and meshes with the transmission gear 36.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A gearbox for a small machine tool, characterized in that, include: The spindle box (1) has a hollow gear chamber (16) inside. The spindle box (1) includes an upper housing (11) and a lower housing (13). An mounting ring platform (14) is provided on the outer side of one end of the upper housing (11) and the lower housing (13) that are close to each other. Mounting screws (15) are spaced through the mounting ring platform (14). An oil extraction port (12) is opened on the top of the upper housing (11). Input group (2), the input group (2) is installed on the left or right side of the spindle box (1), the input group (2) passes through the outer wall of the spindle box (1) and enters the gear chamber (16); The transmission group (3) is installed in the gear chamber (16) on the side near the input group (2). The left and right sides of the transmission group (3) are engaged in the front and rear side walls of the spindle box (1). The transmission group (3) meshes with the input group (2). The output group (4) is located in the center of the spindle box (1) on the side of the transmission group (3) away from the input group (2). The output group (4) is installed on the left and right sides of the front and rear side walls of the spindle box (1). The output group (4) and the transmission group (3) mesh and transmit power.

2. The gearbox of the small machine tool according to claim 1, characterized in that, The input group (2) includes: A bushing (21) is bolted to the center of the left or right side wall of the main shaft box (1), and a bearing (22) is fitted on the left and right sides of the bushing (21). An input shaft (23) is inserted through the center of a bushing (21). One side of the input shaft (23) passes through the side wall of the spindle box (1) and enters the gear chamber (16). The outer side wall of the input shaft (23) is press-fitted with the first bearing (22). An input gear (24) is provided on the outer side of the input shaft (23) on one side inside the gear chamber (16), and a spline is provided on the outer side of the input shaft (23) on the other side. The sleeve cover (25) is fitted outside the input shaft (23) and located on the side of the shaft sleeve (21) away from the main spindle box (1). The sleeve cover (25) is connected to the shaft sleeve (21) around its perimeter by bolts. A first sealing ring (26) is fitted in the center of the side of the sleeve cover (25) near the shaft sleeve (21). The first sealing ring (26) is fitted outside the input shaft (23).

3. The gearbox of the small machine tool according to claim 2, characterized in that, The input gear (24) is a helical gear.

4. The gearbox of the small machine tool according to claim 3, characterized in that, The transmission assembly (3) includes: The drive shaft (31) is located in the gear chamber (16) on the side near the input shaft (23), and the drive shaft (31) passes through the front and rear side walls of the main shaft box (1) on both the left and right sides. The No. 2 bearing (32) is interference-fitted and mounted on the left and right sides of the transmission shaft (31). The No. 2 bearing (32) is clamped at the connection between the upper housing (11) and the lower housing (13). The first bearing cover plate (33) is abutted against the left and right ends of the second bearing (32). The first bearing cover plate (33) is connected to the spindle box (1) by bolts. A second sealing ring (34) is provided between the first bearing cover plate (33) and the second bearing (32). A bevel driven gear (35) is mounted in the center of the drive shaft (31) and meshes with the input gear (24); A transmission gear (36) is mounted on one side of the transmission shaft (31).

5. The gearbox of the small machine tool according to claim 4, characterized in that, The output group (4) includes: The output shaft (41) is located in the gear chamber (16) on the side of the transmission shaft (31) away from the input shaft (23). The left side of the output shaft (41) passes through the front side wall of the spindle box (1), and the right side of the output shaft (41) extends outward through the rear side wall of the spindle box (1). The right side of the output shaft (41) is a spline. The No. 3 bearing (42) is interference-fitted and mounted on the left and right sides of the output shaft (41). The No. 3 bearing (42) is also mounted at the connection between the upper housing (11) and the lower housing (13). The No. 2 bearing cover plate (43) and the bearing pressure plate (44) are provided. The No. 2 bearing cover plate (43) is abutted against the left end of the output shaft (41), and the bearing pressure plate (44) is fitted on the right side of the output shaft (41). The No. 2 bearing cover plate (43) and the bearing pressure plate (44) are connected to the spindle box (1) by bolts. A No. 3 sealing ring (45) is provided between the No. 2 bearing cover plate (43) and the bearing pressure plate (44) and the No. 3 bearing (42). Output gear (46) is mounted on one side of output shaft (41) and meshes with transmission gear (36).

6. The gearbox of the small machine tool according to claim 5, characterized in that, The maximum outer diameter of the input gear (24) is smaller than the outer diameter of the bevel driven gear (35) and smaller than the outer diameter of the output gear (46).

Images