CN209925577U

CN209925577U - Mechanical sealing device for transmission box of freezing edge trimmer

Info

Publication number: CN209925577U
Application number: CN201920599043.4U
Authority: CN
Inventors: 姜友远
Original assignee: Nanjing Xin Nada Pml Precision Mechanism Ltd
Current assignee: Nanjing Xin Nada Pml Precision Mechanism Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-01-10
Anticipated expiration: 2029-04-28

Abstract

The utility model discloses a mechanical sealing device of freezing trimmer transmission case, including transmission case, dustproof oil blanket, airtight oil blanket, first bearing and second bearing, the last cooperation of transmission case installs the bearing frame, and the outside of bearing frame is connected with the cylinder flange, be provided with dustproof oil blanket, airtight oil blanket and first bearing between bearing frame and the center pin, and airtight oil blanket is located between dustproof oil blanket and the first bearing, install big umbrella tooth on the center pin, and big umbrella tooth downside is fixed through big umbrella tooth and is only paid and be connected with the center pin, the transmission case outside is fixed with the transmission case lid. According to the mechanical sealing device for the freezing edge trimmer transmission case, a mechanical sealing device is added on the basis of oil seal sealing of a traditional freezing edge trimmer, namely, a transmission case bearing seat is redesigned, so that the service life of an oil seal at a rotating part of a central shaft in the transmission case can be greatly prolonged, the maintenance period of the transmission case is prolonged, and the failure rate of equipment is reduced.

Description

Mechanical sealing device for transmission box of freezing edge trimmer

Technical Field

The utility model relates to a freezing trimmer technical field specifically is a freezing trimmer transmission case mechanical seal device.

Background

The existing refrigeration edge trimmer transmission case central shaft rotation part is mainly sealed by an oil seal, the oil seal is made of nonmetal, the refrigeration edge trimmer is equipment working at low temperature, the logistics performance of the nonmetal material is reduced more or less at low temperature, so that the service life of the oil seal is shortened, and the performance failure of the oil seal can cause dust to enter the transmission case, cause the damage and failure of precision parts such as a bearing and the like, influence the service life of the whole transmission case and increase the failure rate of the equipment.

We have therefore proposed a mechanical sealing device for a freeze trimmer drive box to address the problems set out above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a freezing trimmer transmission case mechanical sealing device to solve the sealed easy performance inefficacy at the rotatory position of present freezing trimmer transmission case that above-mentioned background art provided, lead to the dust to get into the transmission incasement, and then lead to the damage and the inefficacy of accurate parts such as bearing, influence the life-span of whole transmission case, cause the problem of the increase of equipment failure rate.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a mechanical seal device of freezing trimmer transmission case, includes transmission case, dustproof oil blanket, airtight oil blanket, first bearing and second bearing, the last cooperation of transmission case installs the bearing frame, and the outside of bearing frame is connected with the cylinder flange, cylinder flange intermediate junction is fixed with the center pin, and the center pin is located in the middle of the bearing frame, be provided with dustproof oil blanket, airtight oil blanket and first bearing between bearing frame and the center pin, and airtight oil blanket is located between dustproof oil blanket and the first bearing to the dustproof oil blanket outside is connected with the bearing frame, install big umbrella tooth on the center pin, and big umbrella tooth downside is fixed through big umbrella tooth and is only paid and be connected with the center pin, the transmission case outside is fixed with the transmission case lid, and the transmission case lid is connected with the center pin through the second bearing, the outside of big umbrella tooth is connected with little umbrella tooth.

Preferably, the connecting part between the roller flange and the bearing seat is in concave-convex fit connection, the upper and lower tolerance of the fit is-0.1 mm, and the tolerance of the left and right fit is-0.05 mm.

Preferably, the roller flange is made of an aluminum alloy, and the bearing seat and the central shaft are made of SUS 304.

Preferably, the bearing seat is connected with the central shaft through a dustproof oil seal, an airtight oil seal and a first bearing in a matched mode.

Preferably, the upper end of the central shaft is connected with the roller flange through two countersunk head bolts.

Preferably, the large bevel gear is sleeved with the central shaft, and the large bevel gear is fixed to the central shaft through the large bevel gear to form a fixing structure.

Compared with the prior art, the beneficial effects of the utility model are that: the mechanical sealing device of the freezing trimmer transmission case is additionally provided on the basis of oil seal sealing of the traditional freezing trimmer, namely, a transmission case bearing seat is redesigned, three grooves and bulges are arranged on the periphery of the bearing seat, a roller mounting flange is correspondingly designed at the same time, two grooves and bulges are also designed on the roller flange and are just matched with the bearing seat, and the matching clearance is controlled within plus or minus 0.05mm, so that dust is prevented from entering a rotating part of a central shaft in the transmission case, even if trace dust enters the rotating part, the dust can be prevented by an oil seal at the rotating part of the central shaft in the transmission case, the service life of the oil seal at the rotating part of the central shaft in the transmission case can be greatly prolonged, the maintenance period of the transmission case is prolonged, and the failure rate of equipment is reduced;

(1) the roller flange and the bearing seat are in tight concave-convex fit to form a mechanical seal, so that dust with the thickness of more than 0.05mm can be prevented from entering the rotating part of the central shaft in the transmission case, the working environment of oil seal at the rotating part of the central shaft in the transmission case can be effectively improved, and the service life of the oil seal is prolonged;

(2) the redesign of the roller flange increases the bearing capacity of the roller flange and improves the bearing capacity of the roller;

(3) the roller flange and the bearing seat are installed in an embedded mode, so that the installation accuracy of the roller flange is improved, the requirement on the assembly skill of personnel is lowered, the manual work intensity is reduced, and the assembly process accuracy is improved; .

Drawings

FIG. 1 is a schematic view of the overall cross-sectional structure of the present invention;

FIG. 2 is a schematic sectional view of the flange of the roller of the present invention;

fig. 3 is the schematic view of the sectional structure of the bearing seat of the present invention.

In the figure: 1. a transmission case body; 2. a roller flange; 3. a bearing seat; 4. a dustproof oil seal; 5. a central shaft; 6. airtight oil seal; 7. a first bearing; 8. a large bevel gear; 9. a transmission case cover; 10. a second bearing; 11. the big bevel gear is fixed to stop the payment; 12. a small bevel gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a mechanical sealing device of a transmission case of a freezing edge trimmer comprises a transmission case body 1, a roller flange 2, a bearing seat 3, a dustproof oil seal 4, a central shaft 5, an airtight oil seal 6, a first bearing 7, a large bevel gear 8, a transmission case cover 9, a second bearing 10, a large bevel gear fixing stop pair 11 and a small bevel gear 12, wherein the bearing seat 3 is arranged on the transmission case body 1 in a matching way, the roller flange 2 is connected with the outer side of the bearing seat 3, the central shaft 5 is fixedly connected with the middle of the roller flange 2 and is positioned in the middle of the bearing seat 3, the dustproof oil seal 4, the airtight oil seal 6 and the first bearing 7 are arranged between the bearing seat 3 and the central shaft 5, the bearing seat 3 is connected with the outer side of the dustproof oil seal 4, the large bevel gear 8 is arranged on the central shaft 5, and the lower side of the large bevel gear 8 is connected with the central shaft 5 through the large bevel gear, a transmission case cover 9 is fixed on the outer side of the transmission case body 1, the transmission case cover 9 is connected with the central shaft 5 through a second bearing 10, and the outer side of the large bevel gear 8 is connected with a small bevel gear 12.

The connection part between the roller flange 2 and the bearing seat 3 is in concave-convex fit connection, the upper and lower tolerance of the fit is-0.1 mm, the left and right tolerance of the fit is-0.05 mm, the main sealing function is a left and right clearance, namely dust particles above 0.05mm can be prevented from entering the sealing part of the dustproof oil seal 4, dust particles below 0.05mm are prevented by a groove surface in the vertical direction, the particles cannot rise along the sealing surface in the vertical direction under the action of gravity, and therefore the dust particles smaller than 0.05mm can be prevented from entering the sealing part of the dustproof oil seal 4; two points above the synthesis, this mechanical seal mode can prevent most dust particles to get into the position of dustproof oil blanket 4, even if there is a minute amount of dust particles to get into the sealed position of dustproof oil blanket 4 also can be blockked by dustproof oil blanket 4 and airtight oil blanket 6, greatly reduced oil blanket's operational requirement improves oil blanket life to improve the fault rate of transmission case.

The material of cylinder flange 2 adopts the aluminum alloy material, and bearing frame 3 and central shaft 5's material all adopt SUS304, make cylinder flange 2 and bearing frame 3 have different hardness, and when taking place the friction, cylinder flange 2 is worn and torn easily, nevertheless can not harm bearing frame 3, all has positive meaning to the maintenance in later stage.

The bearing seat 3 is connected with the central shaft 5 through the dustproof oil seal 4, the airtight oil seal 6 and the first bearing 7 in a matching mode, the upper end of the central shaft 5 is connected with the roller flange 2 through two countersunk head bolts, the large bevel gear 8 is sleeved with the central shaft 5, and the large bevel gear 8 and the central shaft 5 form a fixed structure through the large bevel gear fixing stop 11.

The working principle is as follows: when the mechanical sealing device of the freezing trimmer transmission case works, the assembly work of the device is completed firstly, a bearing seat 3 is installed on a transmission case body 1 in a matching mode and fixed by four bolts, a dustproof oil seal 4, an airtight oil seal 6 and a first bearing 7 are installed on the bearing seat 3 in a tight matching mode, a large bevel gear 8 is installed on a central shaft 5 and fixed by a large bevel gear fixing stop pair 11, the upper end of the central shaft 5 is installed with the first bearing 7 in a matching mode, the lower end of the central shaft is installed with a second bearing 10 in a matching mode, the second bearing 10 is installed on a transmission case cover 9 in a matching mode, the transmission case cover 9 is installed on the transmission case body 1 and fixed by 8 countersunk bolts, and a small bevel gear 12 is matched with the; the roller flange 2 is matched with the central shaft 5 and the bearing seat 3 at the same time, two countersunk bolts are arranged at the top end of the central shaft 5, and the groove and the bulge on the roller flange 2 are matched with the groove and the bulge on the bearing seat 3, so that the assembly work of the device is completed;

when the device works, the roller flange 2 drives the central shaft 5 to rotate in the transmission box body 1 through the first bearing 7 and the second bearing 10, meanwhile, the large bevel gear 8 on the central shaft 5 also rotates along with the rotation, and in the rotating process of the large bevel gear 8, the large bevel gear 8 is meshed with the small bevel gear 12, so that the large bevel gear 8 can drive the small bevel gear 12 to rotate, and the transmission work of the device is completed;

in the working process of the device, the upper groove and the bulge on the roller flange 2 are mainly matched with the groove and the bulge on the bearing seat 3, the upper and lower matched tolerance is minus 0.1mm, the left and right matched tolerance is minus 0.05mm, and the sealing effect is mainly realized by a left and right clearance, so that dust particles above 0.05mm can be prevented from entering the sealing part of the dustproof oil seal 4, dust particles below 0.05mm are prevented from passing through the groove surface in the vertical direction, the particles cannot rise along the sealing surface in the vertical direction under the action of gravity, and the dust particles smaller than 0.05mm can be prevented from entering the sealing part of the dustproof oil seal 4; two points above the synthesis, this mechanical seal mode can prevent most dust particles to get into the position of dustproof oil blanket 4, even if there is a minute amount of dust particles to get into the sealed position of dustproof oil blanket 4 also can be blockked by dustproof oil blanket 4 and airtight oil blanket 6, greatly reduced oil blanket's operational requirement improves oil blanket life to improve the fault rate of transmission case.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a mechanical seal device of freezing trimmer transmission case, includes transmission case (1), dustproof oil blanket (4), airtight oil blanket (6), first bearing (7) and second bearing (10), its characterized in that: the upper side of the transmission case body (1) is provided with a bearing seat (3) in a matching way, the outer side of the bearing seat (3) is connected with a roller flange (2), the middle of the roller flange (2) is fixedly connected with a central shaft (5), the central shaft (5) is positioned in the middle of the bearing seat (3), a dustproof oil seal (4), an airtight oil seal (6) and a first bearing (7) are arranged between the bearing seat (3) and the central shaft (5), the airtight oil seal (6) is positioned between the dustproof oil seal (4) and the first bearing (7), the outer side of the dustproof oil seal (4) is connected with the bearing seat (3), a large umbrella tooth (8) is arranged on the central shaft (5), the lower side of the large umbrella tooth (8) is connected with the central shaft (5) through a large umbrella tooth fixing stop (11), the outer side of the transmission case body (1) is fixed with a transmission case cover (9), and the transmission case cover (9) is, the outer side of the big umbrella teeth (8) is connected with small umbrella teeth (12).

2. The mechanical seal device for a freezing edge trimmer transmission case according to claim 1, characterized in that: the connecting part between the roller flange (2) and the bearing seat (3) is in concave-convex fit connection, the upper and lower matched tolerance is-0.1 mm, and the left and right matched tolerance is-0.05 mm.

3. The mechanical seal device for a freezing edge trimmer transmission case according to claim 1, characterized in that: the roller flange (2) is made of an aluminum alloy material, and the bearing seat (3) and the central shaft (5) are made of SUS 304.

4. The mechanical seal device for a freezing edge trimmer transmission case according to claim 1, characterized in that: the bearing seat (3) is connected with the central shaft (5) through a dustproof oil seal (4), an airtight oil seal (6) and a first bearing (7) in a matching mode.

5. The mechanical seal device for a freezing edge trimmer transmission case according to claim 1, characterized in that: the upper end of the central shaft (5) is connected with the roller flange (2) through two countersunk head bolts.

6. The mechanical seal device for a freezing edge trimmer transmission case according to claim 1, characterized in that: the large bevel gear (8) is sleeved with the central shaft (5), and the large bevel gear (8) and the central shaft (5) form a fixed structure through a large bevel gear fixing stop pair (11).