Pressure maintaining and plugging device for grease hole in cavity of speed reducer

Abstract

The utility model relates to drive box processing technical field, concretely relates to a speed reducer cavity inner circle grease hole pressure maintaining plugging device, including inside hollow connecting rod, the both ends of connecting rod are detachably connected with extension rod and support rod, the one end of extension rod and support rod all stretches into the inside of connecting rod, and the length of extension rod and support rod that stretches into the inside of connecting rod is adjustable, the one end of extension rod is detachably connected with sealed mounting head, and sealed mounting head includes abutting platform and sets up the plugging column of abutting platform front end, the front end of abutting platform is round table shape structure, the surface of plugging column is equipped with at least two ring shape structure's sealing groove, and the sealing groove is inlayed with sealing ring. The utility model can avoid the damage to the surface of the inner circle sidewall of the cavity of the speed reducer finish machining while facilitating the plugging of the grease hole of the inner circle sidewall of the cavity of the speed reducer, and can also be suitable for the grease hole plugging of the inner circle sidewall of the cavity of the speed reducer with different diameters.

Description

Technical Field

[0001] This utility model relates to the field of drive box processing technology, specifically to a pressure-maintaining and sealing device for the inner circumferential grease hole of a reducer cavity. Background Technology

[0002] Driveboxes are typically machined using vertical lathes to meet their structural and high-precision machining requirements. After the drivebox is finished, several grease holes for lubrication are usually designed on the inner circular sidewall of the reducer cavity. To ensure a tight seal during grease injection, a pressure holding operation is usually required after finishing. Since the grease holes are located on the inner circular sidewall of the reducer cavity, they must be sealed before the pressure holding operation can proceed. Furthermore, the pressure holding process must not affect the normal use of the grease holes, nor the surface quality of the finished inner circular sidewall of the reducer. However, due to the limited space in the area where the grease holes are located on the inner circular sidewall of the reducer cavity, it is impossible to use machine tools to fabricate threads or other sealing mechanisms to seal the grease holes. Moreover, because the inner circular sidewall of the reducer cavity is a finished surface with high surface quality requirements, it is also impossible to seal the grease holes by welding or other methods. This presents a challenge in pressure holding and sealing the grease holes on the inner circular sidewall of the reducer cavity. Summary of the Invention

[0003] This invention addresses the problem of difficulty in maintaining pressure and sealing grease holes in the inner circular sidewall of a speed reducer cavity in existing technologies. It provides a pressure-maintaining and sealing device for grease holes in the inner circular sidewall of a speed reducer cavity. This device facilitates the sealing of grease holes in the inner circular sidewall of the speed reducer cavity while avoiding damage to the precision-machined surface of the inner circular sidewall. It is reusable, its support and sealing range is adjustable, and it is suitable for sealing grease holes in the inner circular sidewall of speed reducers of different diameters.

[0004] To achieve the above objectives, the technical solution of this utility model is: a pressure-holding and sealing device for grease holes in the inner circle of a reducer cavity, comprising a hollow connecting rod, with an extension rod and a support rod detachably connected to both ends of the connecting rod, respectively. One end of each extension rod and support rod extends into the interior of the connecting rod, and the lengths of the extension rod and support rod extending into the connecting rod are adjustable. By adjusting the lengths of the extension rod and support rod extending into the connecting rod, the overall length of the sealing device can be adjusted, thereby achieving the effect of sealing grease holes on the inner circle sidewall of a reducer cavity of different diameters.

[0005] One end of the extension rod is detachably connected to a sealing mounting head. The sealing mounting head includes a clamping platform and a sealing post disposed at the front end of the clamping platform. The front end of the clamping platform has a frustum-shaped structure. The surface of the sealing post is provided with at least two annular sealing grooves, and a sealing ring is embedded in each sealing groove. By embedding the sealing post into the grease hole, the grease hole on the inner circular side wall of the reducer cavity is sealed. The clamping platform is used to press against the opening of the grease hole on the inner circular side wall of the reducer cavity, thereby limiting and fixing the position of one end of the sealing device.

[0006] Furthermore, the connecting rod includes an intermediate cylinder and connecting nuts, with the connecting nuts fixedly connected to both ends of the intermediate cylinder. The intermediate cylinder is hollow inside so that one end of the extension rod and the support rod can extend into the intermediate cylinder. The connecting nuts are used to connect with the extension rod and the support rod, so that the overall length of the sealing device can be adjusted, achieving the effect of adjustable support and sealing range.

[0007] Furthermore, the extension rod includes an extension screw and a threaded cylinder. One end of the extension screw extends into the middle cylinder and is detachably threaded to the connecting nut. This is to facilitate the assembly and disassembly of the extension rod and the connecting rod, and to facilitate the adjustment of the length of the extension rod extending into the connecting rod.

[0008] Furthermore, the threaded cylinder is fixedly disposed at the other end of the extension screw, and the threaded cylinder is coaxially disposed with the extension screw, serving to connect the sealing mounting head.

[0009] Furthermore, the front diameter of the clamping platform gradually decreases from left to right, and the rear end of the clamping platform has a cylindrical structure; a connecting stud is fixedly connected to the rear end of the clamping platform, and the connecting stud is detachably connected to the threaded cylinder. The purpose of this is to facilitate the disassembly and assembly of the extension rod and the sealing mounting head, so as to replace the sealing mounting head with a sealing column of different diameter as needed to seal the grease hole diameter.

[0010] Furthermore, the support rod includes a support screw and a support head. One end of the support screw extends into the intermediate cylinder and is detachably threaded to the connecting nut. The support head is fixedly disposed at the other end of the support screw. This is to facilitate the assembly and disassembly of the support screw and the connecting rod, and to facilitate the adjustment of the length of the support screw extending into the connecting rod.

[0011] Furthermore, the support head is coaxially arranged with the support screw, the front end of the support head is cylindrical and the rear end is hemispherical, and the support head is used to contact and abut against the side wall of the other end of the inner circle of the reducer cavity.

[0012] The beneficial effects of this utility model through the above technical solution are as follows: 1. This utility model has a reasonable structure and good performance. It can facilitate the sealing of grease holes on the inner circular sidewall of the reducer cavity while avoiding damage to the precision-machined inner circular sidewall surface of the reducer cavity. It can be reused and quickly disassembled and installed. It is not limited by the space of the area where the grease hole is located on the inner circular sidewall of the reducer cavity. Its overall length can be adjusted to achieve the effect of adjustable support and sealing range. It can be used to seal grease holes on the inner circular sidewall of reducer cavities of different diameters and has strong versatility.

[0013] 2. This utility model uses the method of embedding the sealing post of the sealing installation head into the grease hole to achieve the effect of sealing the grease hole on the inner circular side wall of the reducer cavity. The sealing ring embedded in the sealing groove on the sealing post plays a sealing role. The pressing platform is used to press against the opening of the grease hole on the inner circular side wall of the reducer cavity to achieve the limiting and fixing of one end of the sealing device.

[0014] 3. The connecting stud of the sealing mounting head of this utility model is threadedly engaged with the threaded sleeve of the extension rod, which allows for the disassembly and assembly of the extension rod and the sealing mounting head. This enables the replacement of sealing mounting heads with sealing studs of different diameters according to the required diameter of the grease hole to be sealed, thereby improving the applicability.

[0015] 4. This utility model adjusts the overall length of the sealing device by adjusting the length of the extension rod and support rod extending into the connecting rod, thereby achieving the effect of sealing the grease holes on the inner circular sidewall of the reducer cavity of different diameters. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a pressure-maintaining and sealing device for the inner circumferential grease hole of a speed reducer cavity according to this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a pressure-maintaining and sealing device for the inner circumferential grease hole of a speed reducer cavity according to this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of a pressure-maintaining and sealing device for the inner circumferential grease hole of a speed reducer cavity according to this utility model; Figure 4 This is a schematic diagram of the connecting rod of this utility model; Figure 5 This is a schematic diagram of the extension rod of this utility model; Figure 6 This is a schematic diagram of the structure of the sealing mounting head of this utility model; Figure 7 This is a schematic diagram of the structure of the support rod of this utility model; Figure 8 This is a schematic diagram of the structure of this utility model in use; Figure 9 yes Figure 8 A magnified structural diagram of point A in the middle.

[0017] The following labels are used in the attached diagram: 1 is the connecting rod, 101 is the intermediate cylinder, 102 is the connecting nut, 2 is the extension rod, 201 is the extension screw, 202 is the threaded cylinder, 3 is the support rod, 301 is the support screw, 302 is the support head, 4 is the sealing mounting head, 401 is the clamping platform, 402 is the sealing column, 403 is the sealing groove, and 404 is the connecting stud. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-9 As shown, a pressure-holding and sealing device for grease holes in the inner circle of a reducer cavity includes a hollow connecting rod 1. An extension rod 2 and a support rod 3 are detachably connected to both ends of the connecting rod 1. One end of each extension rod 2 and support rod 3 extends into the interior of the connecting rod 1, and the lengths of the extension rod 2 and support rod 3 extending into the connecting rod 1 are adjustable. In this embodiment, the hollow interior of the connecting rod 1 facilitates the accommodation of the extension rod 2 and support rod 3. By adjusting the lengths of the extension rod 2 and support rod 3 extending into the connecting rod 1, the overall length of the sealing device can be adjusted, thereby achieving the effect of sealing grease holes in the inner circle sidewalls of reducer cavities of different diameters. Simultaneously, the detachable connection between the connecting rod 1 and the extension rod 2 and support rod 3 facilitates assembly and disassembly, making it easy to carry.

[0019] One end of the extension rod 2 is detachably connected to a sealing mounting head 4. The sealing mounting head 4 includes a pressing platform 401 and a sealing post 402 disposed at the front end of the pressing platform 401. The front end of the pressing platform 401 has a frustum-shaped structure. At least two sealing grooves 403 with annular structure are arranged at intervals on the surface of the sealing post 402. A sealing ring (not shown in the figure) is embedded in the sealing groove 403. In this embodiment, the sealing mounting head 4 and the extension rod 2 are detachably connected so that the sealing mounting head 4 with a sealing column 402 of different diameters can be replaced as needed to seal the grease hole diameter. The front end of the pressing platform 401 has a frustum-shaped structure so that the pressing platform 401 can press against the opening of the grease hole on the inner circular side wall of the reducer cavity, thereby achieving the limiting and fixing of one end of the sealing device. The sealing column 402 plays the role of sealing the grease hole. The sealing column 402 has two sealing grooves 403. The sealing column 402 of the sealing mounting head 4 matches the grease hole to be sealed and is embedded in the grease hole. Through the action of the sealing ring in the sealing groove 403, the grease hole on the inner circular side wall of the reducer cavity is sealed and plugged. The sealing ring is a rubber sealing ring.

[0020] The connecting rod 1 includes an intermediate cylinder 101 and a connecting nut 102, with the connecting nut 102 fixedly connected to both ends of the intermediate cylinder 101. In this embodiment, the connecting rod 1 mainly serves to connect the extension rod 2 and the support rod 3. The intermediate cylinder 101 is hollow inside, which allows the extension rod 2 and the support rod 3 to extend into the intermediate cylinder 101. The connecting nut 102 connects the extension rod 2 and the support rod 3, and its function is to adjust the length of the extension rod 2 into the intermediate cylinder 101, thereby adjusting the overall length of the sealing device and achieving the effect of sealing the grease holes on the inner circular sidewall of the reducer cavity of different diameters.

[0021] The extension rod 2 includes an extension screw 201 and a threaded cylinder 202. One end of the extension screw 201 extends into the intermediate cylinder 101 and is detachably threadedly connected to the connecting nut 102. In this embodiment, the extension screw 201 and the connecting nut 102 are threadedly engaged, and the overall length of the seal is adjusted by adjusting the length of the extension screw 201 threaded into the intermediate cylinder 101.

[0022] The threaded cylinder 202 is fixedly disposed at the other end of the extension screw 201, and the threaded cylinder 202 is coaxially disposed with the extension screw 201. In this embodiment, the threaded cylinder 202 has an internal thread, and the threaded cylinder 202 is used to connect with the sealing mounting head 4.

[0023] The diameter of the front end of the clamping platform 401 gradually decreases from left to right, and the rear end of the clamping platform 401 has a cylindrical structure. A connecting stud 404 is fixedly connected to the rear end of the clamping platform 401, and the connecting stud 404 is detachably threadedly connected to the threaded cylinder 202. In this embodiment, the connecting stud 404 and the threaded cylinder 202 are threadedly engaged to facilitate the disassembly and assembly of the sealing mounting head 4. Different diameter sealing mounting heads 4 can be replaced with sealing mounting heads 4 with different diameter sealing studs 402 as needed to seal grease holes of varying diameters. The external thread specifications of the connecting studs 404 of different specifications of sealing mounting heads 4 are all consistent, ensuring installation versatility.

[0024] The support rod 3 includes a support screw 301 and a support head 302. One end of the support screw 301 extends into the intermediate cylinder 101 and is detachably threadedly connected to the connecting nut 102. The support head 302 is fixedly disposed at the other end of the support screw 301. In this embodiment, the support screw 301 and the connecting nut 102 are threadedly engaged, and the overall length of the seal is adjusted by adjusting the length of the support screw 301 threaded into the intermediate cylinder 101.

[0025] The support head 302 is coaxially arranged with the support screw 301. The front end of the support head 302 is cylindrical and the rear end is hemispherical. In this embodiment, the support head 302 of the support rod 3 is mainly used to support the side wall of the other end of the inner circle of the reducer cavity, forming a stable support structure with the sealing mounting head 4 at the grease hole end, so as to achieve the sealing and plugging of the grease hole by the sealing mounting head 4. The hemispherical end of the support head 302 contacts and abuts against the side wall of the other end of the inner circle of the reducer cavity. In specific implementation, copper foil protection can also be added between the hemispherical end of the support head 302 and the side wall of the inner circle of the reducer cavity to avoid affecting the surface quality of the precision-machined inner circle side wall of the reducer.

[0026] In use, this invention first requires replacing the sealing mounting head 4 with a sealing post 402 that matches the diameter of the grease hole to be sealed. After replacing the sealing mounting head 4, the overall length of the sealing device is adjusted according to the inner diameter of the reducer cavity to ensure that the sealing device can be placed in the inner circle of the reducer cavity. Then, the grease hole on the inner side wall of the reducer cavity can be sealed by inserting the sealing post 402 at the front end of the sealing mounting head 4 into the grease hole to be sealed. The frustum of the pressing platform 401 is pressed against the opening of the grease hole on the inner circular side wall of the reducer cavity. Then, according to the threaded engagement of the support screw 301 and the extension screw 201 with the connecting nut 102, the length of the thread screwed into the intermediate cylinder 101 is adjusted so that the hemispherical end of the support head 302 contacts and abuts against the other end side wall of the inner circular side of the reducer cavity, forming a stable support structure. Under the action of the sealing column 402 and its outer sealing ring, the grease hole is sealed and plugged, and then the pressure holding operation of the grease hole can be performed.

[0027] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. A pressure-maintaining and sealing device for the grease hole in the inner circle of a reducer cavity, characterized in that, Includes a hollow connecting rod (1), with an extension rod (2) and a support rod (3) detachably connected to both ends of the connecting rod (1). One end of the extension rod (2) and the support rod (3) extends into the interior of the connecting rod (1), and the length of the extension rod (2) and the support rod (3) extending into the connecting rod (1) is adjustable. One end of the extension rod (2) is detachably connected to a sealing mounting head (4). The sealing mounting head (4) includes a pressing platform (401) and a sealing post (402) disposed at the front end of the pressing platform (401). The front end of the pressing platform (401) has a frustum-shaped structure. At least two sealing grooves (403) with annular structure are arranged at intervals on the surface of the sealing post (402). A sealing ring is embedded in the sealing groove (403).

2. The pressure-maintaining and sealing device for the inner circumferential grease hole of a reducer cavity according to claim 1, characterized in that, The connecting rod (1) includes an intermediate cylinder (101) and a connecting nut (102), and the connecting nut (102) is fixedly connected to both ends of the intermediate cylinder (101).

3. The pressure-maintaining and sealing device for the inner circumferential grease hole of a reducer cavity according to claim 2, characterized in that, The extension rod (2) includes an extension screw (201) and a threaded cylinder (202). One end of the extension screw (201) extends into the intermediate cylinder (101) and is detachably threaded to the connecting nut (102).

4. The pressure-holding and sealing device for the inner circumferential grease hole of a reducer cavity according to claim 3, characterized in that, The threaded cylinder (202) is fixedly disposed at the other end of the extension screw (201), and the threaded cylinder (202) and the extension screw (201) are coaxially disposed.

5. The pressure-maintaining and sealing device for the inner circumferential grease hole of a reducer cavity according to claim 4, characterized in that, The front diameter of the clamping platform (401) gradually decreases from left to right, and the rear end of the clamping platform (401) has a columnar structure; the rear end of the clamping platform (401) is fixedly connected to a connecting stud (404), and the connecting stud (404) is detachably connected to the threaded cylinder (202) by threads.

6. The pressure-maintaining and sealing device for the inner circumferential grease hole of a reducer cavity according to claim 2, characterized in that, The support rod (3) includes a support screw (301) and a support head (302). One end of the support screw (301) extends into the intermediate cylinder (101) and is detachably threaded to the connecting nut (102). The support head (302) is fixedly disposed at the other end of the support screw (301).

7. The pressure-maintaining and sealing device for the inner circumferential grease hole of a reducer cavity according to claim 6, characterized in that, The support head (302) is coaxially arranged with the support screw (301), and the front end of the support head (302) is cylindrical and the rear end is hemispherical.

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