Grinding machine gear box with high sealing performance

Abstract

The utility model discloses a grinding machine gear box with high sealing performance, which is characterized by comprising an upper shell, a lower shell, a rotary gear and a first driving mechanism, the upper shell is rotatably connected with the lower shell, a connecting ring table is arranged on the lower shell, the rotary gear is arranged on the connecting ring table, the first driving mechanism is arranged on the upper shell and drives the rotary gear to rotate, and the first driving mechanism drives the rotary gear to rotate. And a first oil seal piece is arranged at the part, in running fit with the connecting ring table, of the upper shell. Compared with the prior art, the radial size of the oil sealing piece can be reduced, the structural strength of the oil sealing piece is improved, and the oil sealing piece is not prone to deformation in the working process. The sealing performance of the oil storage cavity is further improved, and meanwhile the service life of the oil sealing piece is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of grinders, in particular to a high-sealing grinder gearbox. Background Art

[0002] A floor grinder is an automated device used for grinding or polishing concrete floors, and can be widely applied to floor construction in underground garages and industrial plants. It is an indispensable device in the construction processes of epoxy floors, cured floors, and emery floors. The floor grinder is mainly used to remove the floating slurry on the concrete surface (after the concrete is completely dry) to facilitate subsequent floor surface construction work. The floor grinder can achieve the functions of floor grinding or polishing by replacing different machine cutter heads, and has the characteristics of being portable, flexible, and high in working efficiency.

[0003] For example, the utility model patent with the patent publication number CN220540265U discloses a floor grinder gearbox, which can independently control the rotation speeds of the box body and the grinding disc, and the adjustment is more flexible. In the above solution, the connecting cover plate is fixedly connected to the frame, and the connecting cover plate is rotatably connected to the upper shell. In order to avoid leakage in the upper oil storage cavity, an annular groove is provided at the outer end of the upper box body, and a sealing element is provided in the annular groove for sealing. However, in the above structure, due to the relatively large radial dimension of the sealing element, it is prone to deformation, so after long-term operation, the upper oil storage cavity is prone to oil leakage.

[0004] In view of this, the applicant has conducted in-depth research on the above problems, and thus this case has been created. Summary of the Invention

[0005] The main purpose of the utility model is to provide a high-sealing grinder gearbox, which can effectively solve the above technical problems.

[0006] To achieve the above object, the solution of the utility model is:

[0007] A high-sealing grinder gearbox includes an upper shell, a lower shell, a rotating gear, and a first driving mechanism. The upper shell is rotatably connected to the lower shell. A connecting ring platform is provided on the lower shell, the rotating gear is installed on the connecting ring platform, and the first driving mechanism is provided on the upper shell and drives the rotating gear to rotate. A first sealing element is provided at the part where the upper shell is in rotational cooperation with the connecting ring platform.

[0008] Furthermore, the upper shell includes an upper box cover, an upper box body, and an upper bearing sleeve. The upper box body and the upper bearing sleeve are connected to the lower end of the upper box cover. The upper bearing sleeve is arranged inside the connecting ring platform, and the upper bearing sleeve and the connecting ring platform are rotatably connected through a bearing. An annular groove is provided on the inner side of the bottom wall of the upper box body, and the first sealing element is embedded in the annular groove.

[0009] Further, a first annular groove is provided on the inner sidewall of the connecting ring platform. A first accommodating cavity for installing a bearing is formed between the first annular groove and the outer sidewall of the upper bearing sleeve. A second annular groove is provided at the lower end of the outer sidewall of the upper bearing sleeve. A second accommodating cavity for installing a second oil seal is formed between the second annular groove and the inner sidewall of the upper bearing sleeve.

[0010] Further, the first driving mechanism includes a first input shaft and a first gear. An installation seat is provided on the upper box cover. The first input shaft is rotatably connected to the installation seat. The lower end of the first input shaft extends into the upper box body. The first gear is installed at the lower end of the first input shaft. The first gear is meshed and driven with the rotary gear.

[0011] Further, the first oil seal includes a vertical portion, a horizontal portion, and a pressing top portion that are connected in sequence. The vertical portion and the horizontal portion are respectively in abutting connection with the sidewall and the bottom wall of the annular embedding groove. A convex portion protruding towards the direction of the connecting ring platform is provided on the sidewall of the pressing top portion. The convex portion is in abutting connection with the sidewall of the connecting ring platform.

[0012] Further, the lower housing includes a lower box cover and a lower box body. The lower box cover is installed on the lower box body. A connecting seat protruding upwards is provided in the middle of the lower box cover. The connecting ring platform is installed on the connecting seat.

[0013] Further, a lower bearing sleeve is also provided on the lower box cover. A third annular groove for cooperating with the lower box cover is provided on the sidewall of the lower bearing sleeve.

[0014] Further, a bearing base is installed on the lower box body. A circular boss is provided at the upper end of the bearing base. The circular boss is fixedly connected to the lower box body.

[0015] Further, a second driving mechanism is also included. The second driving mechanism includes a second input shaft, a transmission gear, a transmission shaft, an output shaft, and an output gear. The second input shaft is rotatably connected through the upper housing and the lower housing. The transmission shaft and the output shaft are rotatably arranged inside the lower housing. The transmission gear is sleeved on the transmission shaft. The output gear is sleeved on the output shaft. A gear section is provided on the second input shaft. The gear section is meshed and driven with the transmission gear. The output gear is meshed and driven with the transmission gear.

[0016] Compared with the prior art, the beneficial effects are as follows. The structure of the gearbox is improved in the present novel. A connecting ring platform is provided in the middle of the upper end of the lower housing, so that the rotation matching part of the upper housing and the lower housing moves to a position closer to the inner part of the gearbox, and a first oil seal is provided at the rotation matching part. In this way, the radial dimension of the first oil seal is smaller, the structural strength is higher, and it is not easy to deform during work. The sealing performance of the oil storage cavity is further improved, and the service life of the first oil seal is effectively extended. Description of the Drawings

[0017] Figure 1 This is a three-dimensional schematic diagram of the external structure of the present utility model.

[0018] Figure 2 This is a schematic diagram of the sectional structure of the present utility model.

[0019] Figure 3 This is another schematic diagram of the sectional structure of the present utility model.

[0020] Figure 4 is Figure 2 a partial enlarged view of area A in

[0021] In the figure: upper housing 1, upper box cover 11, upper box body 12, annular groove 121, upper bearing sleeve 13, second annular groove 131, lower housing 2, connecting ring platform 21, first annular groove 211, lower box cover 22, connecting seat 221, lower box body 23, lower bearing sleeve 24, third annular groove 241, bearing base 25, circular boss 251, rotating gear 3, first oil seal 41, vertical part 411, horizontal part 412, abutting top 413, protruding part 414, second oil seal 42, first input shaft 51, first gear 52, second input shaft 61, gear section 611, driving gear 62, transmission shaft 63, output shaft 64, output gear 65. Specific embodiments

[0022] In order to further explain the technical solution of the present utility model, the present utility model will be elaborated in detail below through specific embodiments.

[0023] Such as Figures 1-4As shown in the figure, a high-sealing grinding machine gearbox includes an upper housing 1, a lower housing 2, a rotating gear 3, and a first driving mechanism. The upper housing 1 is rotatably connected to the lower housing 2. The lower housing 2 is provided with a connecting ring platform 21. The rotating gear 3 is fixedly connected to the connecting ring platform 21. The first driving mechanism is arranged on the upper housing 1 and drives the rotating gear 3 to rotate, thereby driving the lower housing 2 to rotate relative to the upper housing 1. A first oil seal 41 is provided at the part where the upper housing 1 is rotatably matched with the connecting ring platform 21. Specifically, the upper housing 1 includes an upper cover 11, an upper box body 12, and an upper bearing sleeve 13. The upper box body 12 and the upper bearing sleeve 13 are fixedly connected to the lower end of the upper cover 11. The upper bearing sleeve 13 is arranged in the middle of the upper cover 11, so that the upper bearing sleeve 13 is arranged inside the connecting ring platform 21. The inside of the upper bearing sleeve 13 can be used to install a bearing, making the rotation of the second input shaft 61 smoother. The upper bearing sleeve 13 is rotatably connected to the connecting ring platform 21 through a bearing, making the relative rotation between the upper housing 1 and the connecting ring platform 21 smoother. An annular groove 121 is provided on the inner side of the bottom wall of the upper box body 12, and the first oil seal 41 is embedded in the annular groove 121. A first annular groove 211 is provided on the inner side wall of the connecting ring platform 21. A first accommodation cavity for installing a bearing is formed between the first annular groove 211 and the outer side wall of the upper bearing sleeve 13, and the first accommodation cavity can improve the stability of the bearing installation. A second annular groove 131 is provided at the lower end of the outer side wall of the upper bearing sleeve 13. A second accommodation cavity for installing a second oil seal 42 is formed between the second annular groove 131 and the inner side wall of the upper bearing sleeve 13, making the installation of the second oil seal 42 more firm. A liquid storage cavity is formed between the upper housing 1 and the connecting ring platform 21. The liquid storage cavity can be filled with lubricating liquid for cooling. The part where the connecting ring platform 21 and the upper box body 12 rotate relative to each other is sealed by the first oil seal 41, and the part where the connecting ring platform 21 and the upper bearing sleeve 13 rotate relative to each other is sealed by the second oil seal 42. Since the installation positions of the first oil seal 41 and the second oil seal 42 are both close to the center position of the upper housing 1, the radial dimensions of the oil seals are greatly reduced, making it not easy for the oil seals to deform during the rotation of the upper housing 1, improving the sealing performance of the upper housing 1. In addition, the upper bearing seat can be made of steel material, which can reduce the friction with the oil seals, further improving the service life and sealing performance of the oil seals.

[0024] In this embodiment, the first driving mechanism includes a first input shaft 51 and a first gear 52. An installation seat 111 is provided on the upper cover 11. The first input shaft 51 is rotatably connected to the installation seat 111 through a bearing. The lower end of the first input shaft 51 extends into the upper box body 12. The first gear 52 is installed at the lower end of the first input shaft 51, and the first gear 52 is meshed with the rotating gear 3 for transmission. The output rotating shaft of the motor can be connected to the first input shaft 51 and drive the first input shaft 51 to rotate. When the first input shaft 51 rotates, it drives the first gear 52 and the rotating gear 3 to rotate relative to each other, thereby driving the lower housing 2 to rotate.

[0025] Preferably, the first oil seal 41 includes a vertical portion 411, a horizontal portion 412, and a top abutting portion 413 that are connected in sequence. The vertical portion 411 and the horizontal portion 412 are respectively abutted and connected to the side wall and the bottom wall of the annular groove 121, and a convex portion 414 protruding toward the connecting ring platform 21 is provided on the side wall of the top abutting portion 413, and the convex portion 414 abuts against the side wall of the connecting ring platform 21. After adopting the above structure, the structural strength of the first oil seal 41 is higher and the sealing performance is better.

[0026] In this embodiment, the lower housing 2 includes a lower box cover 22 and a lower box body 23. The lower box cover 22 is fixedly connected to the lower box body 23. A connecting seat 221 protruding upward is provided in the middle of the lower box cover 22, and the connecting ring platform 21 is installed on the connecting seat 221, making the installation of the connecting ring platform 21 more firm. A lower bearing sleeve 24 is also provided on the lower box cover 22. A third annular groove 241 that cooperates with the lower box cover 22 is provided on the side wall of the lower bearing sleeve 24, making the cooperation between the lower bearing sleeve 24 and the box cover closer. And a bearing base 25 is installed on the lower box body 23. A circular boss 251 is provided at the upper end of the bearing base 25, and the circular boss 251 is fixedly connected to the lower box body 23. The inside of the lower bearing sleeve 24 and the bearing base 25 can be used to install bearings, making the connection of the second input shaft 61 more firm and the rotation more stable.

[0027] In this embodiment, a second driving mechanism is further included. The second driving mechanism includes a second input shaft 61, a transmission gear 62, a transmission shaft 63, an output shaft 64, and an output gear 65. The second input shaft 61 is rotatably connected through the upper housing 1 and the lower housing 2. The transmission shaft 63 and the output shaft 64 are rotatably arranged inside the lower housing 2, and the grinding disc is installed at the lower end of the output shaft 64. The transmission gear 62 is sleeved on the transmission shaft 63, the output gear 65 is sleeved on the output shaft 64, and a gear section 611 is provided on the second input shaft 61. The gear section 611 meshes with the transmission gear 62 for transmission, and the output gear 65 meshes with the transmission gear 62 for transmission. After adopting the above structure, the second input shaft 61 is driven by a motor to rotate, thereby driving the transmission gear and the output gear 65 to rotate, and then driving the grinding disc to rotate for grinding work.

[0028] Compared with the prior art, the beneficial effects are that the structure of the gearbox is improved in this new type. A connecting ring platform 21 is provided in the middle of the upper end of the lower housing 2, so that the rotation matching part of the upper housing 1 and the lower housing 2 is moved to a position closer to the inner part of the gearbox, and a first oil seal 41 is provided on the rotation matching part. In this way, the radial dimension of the first oil seal 41 is smaller and the structural strength is higher, and it is not easy to deform during work. The sealing performance of the oil storage cavity is further improved, and at the same time, the service life of the first oil seal 41 is effectively extended.

[0029] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by those of ordinary skill in the relevant technical field shall be regarded as not departing from the patent scope of the present utility model.

Claims

1. A high-sealing grinding machine gearbox, characterized in that, It includes an upper housing, a lower housing, a slewing gear and a first driving mechanism. The upper housing is rotatably connected to the lower housing. A connecting ring platform is provided on the lower housing. The slewing gear is mounted on the connecting ring platform. The first driving mechanism is provided on the upper housing and drives the slewing gear to rotate. A first oil seal is provided at the portion where the upper housing is in rotational fit with the connecting ring platform.

2. The high-sealing grinding machine gearbox according to claim 1, characterized in that, The upper housing includes an upper cover, an upper box body and an upper bearing sleeve. The upper box body and the upper bearing sleeve are connected to the lower end of the upper cover. The upper bearing sleeve is provided inside the connecting ring platform. The upper bearing sleeve is rotatably connected to the connecting ring platform through a bearing. An annular groove is provided on the inner side wall of the bottom wall of the upper box body, and the first oil seal is embedded in the annular groove.

3. The high-sealing grinding machine gearbox according to claim 2, characterized in that, A first annular groove is provided on the inner side wall of the connecting ring platform. A first accommodating cavity for installing a bearing is formed between the first annular groove and the outer side wall of the upper bearing sleeve. A second annular groove is provided at the lower end of the outer side wall of the upper bearing sleeve. A second accommodating cavity for installing a second oil seal is formed between the second annular groove and the inner side wall of the upper bearing sleeve.

4. The high-sealing grinding machine gearbox according to claim 2, characterized in that, The first driving mechanism includes a first input shaft and a first gear. A mounting seat is provided on the upper cover. The first input shaft is rotatably connected to the mounting seat. The lower end of the first input shaft extends into the interior of the upper box body. The first gear is mounted at the lower end of the first input shaft, and the first gear meshes with the slewing gear for transmission.

5. A highly sealed gearbox of a grinding machine according to claim 1, characterized in that, The first oil seal includes a vertical portion, a horizontal portion and a top portion connected in sequence. The vertical portion and the horizontal portion are respectively in abutting connection with the side wall and the bottom wall of the annular groove. A protruding portion protruding towards the side wall of the connecting ring platform is provided on the side wall of the top portion, and the protruding portion abuts against the side wall of the connecting ring platform.

6. The high-sealing grinding machine gearbox according to claim 1, characterized in that, The lower housing includes a lower cover and a lower box body. The lower cover is mounted on the lower box body. A connecting seat protruding upwards is provided in the middle of the lower cover. The connecting ring platform is mounted on the connecting seat.

7. The high-sealing grinding machine gearbox according to claim 6, characterized in that, A lower bearing sleeve is further provided on the lower cover. A third annular groove for cooperating with the lower cover is provided on the side wall of the lower bearing sleeve.

8. The high-sealing grinding machine gearbox according to claim 6, wherein, A bearing base is mounted on the lower box body. A circular boss is provided at the upper end of the bearing base, and the circular boss is fixedly connected to the lower box body.

9. The high-sealing grinding machine gearbox according to claim 1, characterized in that, It further includes a second driving mechanism. The second driving mechanism includes a second input shaft, a transmission gear, a transmission shaft, an output shaft and an output gear. The second input shaft passes through the upper housing and the lower housing and is rotatably connected. The transmission shaft and the output shaft are rotatably arranged inside the lower housing. The transmission gear is sleeved on the transmission shaft, and the output gear is sleeved on the output shaft. A gear section is provided on the second input shaft, and the gear section meshes with the transmission gear for transmission. The output gear meshes with the transmission gear for transmission.

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