Push rod oil seal device
By pushing the design of the rod oil sealing device in the cigarette packaging machine, using multiple reflow tanks and reflow channels, the problems of lubricating oil backlog and oil leakage are solved, and the effective reflow and sealing effect of lubricating oil is achieved.
Patent Information
- Application Number
- CN202422063632.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-23
AI Technical Summary
In cigarette packaging machines, lubricating oil is prone to accumulate to the oil seal, affecting the reflow of lubricating oil and leading to oil leakage, especially when the lubricating oil viscosity is too low or the push rod running speed is high.
An oil seal device for pushing rod is designed, including a mounting seat and an oil seal. The guide hole wall of the mounting seat is spaced apart with multiple return grooves along the axis direction of its own. The oil seal is arranged in the installation groove, cooperates with the outer circumference of the pushing rod, and lubricating oil is promptly introduced into the box through the return channel.
Through the design of multiple reflow tanks, the reflow effect of lubricant oil is improved, the oil sealing pressure of lubricant oil on the outer peripheral part of the push rod is reduced, the lubricant oil is accumulated to the oil seal, the sealing effect of lubricant is ensured, and the phenomenon of lubricant leakage is reduced.
Smart Images
Figure CN222988463U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cigarette production equipment, in particular to a push rod oil seal device. Background Art
[0002] During the production process of a cigarette packing machine, a reciprocating push rod is required to push cigarette packs on a conveyor line to achieve functions such as sorting and transferring of cigarette packs. During the reciprocating movement of the push rod, in order to reduce the wear of the push rod during high-speed reciprocating movement, a lubricating oil supply system is arranged in the box body of the packing machine to lubricate the push rod, and an oil seal assembly is used to scrape the push rod and accompany the return flow to the box body, thereby preventing the lubricating oil in the box body from being carried out. However, during actual use, it is found that when the viscosity of the lubricating oil is too low or the operating speed of the push rod is relatively high, the lubricating oil is easily accumulated at the oil seal, affecting the return flow of the lubricating oil and causing oil leakage. Content of the Utility Model
[0003] The purpose of the utility model is to provide a push rod oil seal device, which has a simple structure and good lubricating oil sealing effect.
[0004] To achieve this purpose, the utility model adopts the following technical solutions:
[0005] Provide a push rod oil seal device, including a mounting seat and an oil seal. The mounting seat has a first side adjacent to the inside of the box body. The mounting seat is provided with a guide hole penetrating through the first side. The guide hole is in sliding fit with the push rod. An installation groove is annularly recessed in the hole wall of the guide hole around the central axis of the guide hole. The oil seal is clamped in the installation groove and is in interference fit with the outer periphery of the push rod. A plurality of return grooves are spaced along the axial direction of the hole wall of the guide hole. All the return grooves are annularly arranged along the central axis of the guide hole, and all the return grooves are located between the first side and the installation groove. A return channel is opened on the first side. The return channel extends along the central axis direction of the guide hole and is communicated with all the return grooves.
[0006] As a preferred scheme of the push rod oil seal device, the return channel includes a communication groove recessed on the first side, and the communication groove penetrates through the hole wall of the guide hole.
[0007] As a preferred scheme of the push rod oil seal device, at least part of the groove wall of the communication groove is inclined. The inclined groove wall of the communication groove is a first inclined groove wall. The first inclined groove wall is inclined from the end far from the first side towards the end close to the first side and away from the central axis direction of the guide hole.
[0008] As a preferred solution of the push rod oil seal device, the included angle between the first inclined groove wall and the central axis of the guiding hole is θ, and 30° ≤ θ ≤ 45°.
[0009] As a preferred solution of the push rod oil seal device, the communication groove communicates with the installation groove; and / or,
[0010] The return channel further includes a return hole opened on the first side, and the return hole extends along the central axis of the guiding hole and communicates with the installation groove.
[0011] As a preferred solution of the push rod oil seal device, the mounting seat includes a seat body and an end cover that are detachably connected. The mounting seat is provided with a first communication hole through which the push rod passes. A plurality of the return grooves are provided on the hole wall of the first communication hole. The end cover is provided with a second communication hole corresponding to the first communication hole. The first communication hole and the second communication hole are combined to form the guiding hole. The side of the seat body adjacent to the end cover is the second side. The second side is provided with the installation groove annularly along the outer periphery of the first communication hole. The oil seal is clamped between the bottom of the installation groove and the end cover.
[0012] As a preferred solution of the push rod oil seal device, the push rod oil seal device further includes a sealing ring, and the sealing ring is provided between the seat body and the end cover; and / or,
[0013] The seat body is detachably connected to the box body, and the sealing ring is provided between the seat body and the box body.
[0014] As a preferred solution of the push rod oil seal device, the seat body includes a main body portion and a positioning portion provided on the side of the main body portion facing the box body. The main body portion is installed on the box body, and the box body is provided with an installation hole. The positioning portion is inserted into the installation hole.
[0015] As a preferred solution of the push rod oil seal device, the oil seal includes a fixing portion and an extending portion provided on the side of the fixing portion away from the end cover. The fixing portion is provided in the installation groove, and the extending portion at least partially extends into the return groove adjacent to the installation groove.
[0016] As a preferred solution of the push rod oil seal device, a diversion groove is annularly recessed along the central axis of the guiding hole on the first side. The groove wall of the diversion groove adjacent to the central axis of the guiding hole is the second inclined groove wall, and the second inclined groove wall intersects with the hole wall of the guiding hole at an angle.
[0017] Advantages of the present utility model: By providing a plurality of return grooves on the hole wall of the guiding hole and located between the first side and the mounting groove, when the push rod slides outwards along the central axis of the guiding hole, part of the lubricating oil is scraped into the return grooves and timely led back into the box body through the return channels, improving the return effect of the lubricating oil, reducing the sealing oil pressure of the lubricating oil on the outer periphery of the push rod on the oil seal, and avoiding the situation where the lubricating oil adhered to the outer periphery of the push rod is blocked by the oil seal and accumulated at the oil seal, thereby ensuring the sealing effect of the oil seal on the lubricating oil and reducing the occurrence of lubricating oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present utility model will be further described in detail below with reference to the drawings and embodiments.
[0019] Figure 1 is a schematic diagram of the cooperation of the push rod oil seal device, the box body, and the push rod according to an embodiment of the present utility model;
[0020] Figure 2 is a schematic structural diagram of the push rod oil seal device according to an embodiment of the present utility model;
[0021] Figure 3 is an exploded schematic diagram of the push rod oil seal device according to an embodiment of the present utility model;
[0022] Figure 4 is a sectional view of the push rod oil seal device according to an embodiment of the present utility model.
[0023] In the figure:
[0024] 100, box body; 200, push rod;
[0025] 1, mounting seat; 10, first side; 11, guiding hole; 12, mounting groove; 13, return groove; 14, communication groove; 141, first inclined groove wall; 15, seat body; 151, first communication hole; 152, main body part; 153, positioning part; 16, end cover; 161, second communication hole; 162, limiting groove; 17, second side; 18, diversion groove; 181, second inclined groove wall; 2, oil seal; 21, fixing part; 22, extending part. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all structures.
[0027] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0028] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0029] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0030] Such as Figure 1 and Figure 2 As shown, the push rod oil seal device of the embodiment of the present utility model includes a mounting seat 1 and an oil seal 2. The mounting seat 1 has a first side 10 adjacent to the inside of the box body 100. The mounting seat 1 is provided with a guide hole 11 penetrating through the first side 10. The guide hole 11 is in sliding fit with the push rod 200. An installation groove 12 is annularly recessed in the hole wall of the guide hole 11 around the central axis of the guide hole 11. The oil seal 2 is clamped in the installation groove 12 and is in interference fit with the outer periphery of the push rod 200. A plurality of return grooves 13 are arranged at intervals along the axis direction of the hole wall of the guide hole 11. All the return grooves 13 are annularly arranged along the central axis of the guide hole 11, and all the return grooves 13 are located between the first side 10 and the installation groove 12. A return channel is opened on the first side 10. The return channel extends along the central axis direction of the guide hole 11 and is communicated with all the return grooves 13.
[0031] It can be understood that by providing a plurality of return grooves 13 on the hole wall of the guiding hole 11 and located between the first side 10 and the mounting groove 12, when the push rod 200 slides out along the central axis of the guiding hole 11, part of the lubricating oil is scraped into the return grooves 13, that is, part of the lubricating oil is scraped into the return grooves 13 by the edge structure between the return grooves 13, or gradually accumulated by the oil seal 2 and extruded into the return grooves 13, and then timely led back into the box body 100 through the return channel, improving the return effect of the lubricating oil, reducing the oil sealing pressure of the lubricating oil on the outer periphery of the push rod 200 on the oil seal 2, and avoiding the situation where the lubricating oil adhered to the outer periphery of the push rod 200 is blocked by the oil seal 2 and accumulated at the oil seal 2, thereby ensuring the sealing effect of the oil seal 2 on the lubricating oil and reducing the occurrence of lubricating oil leakage. And through the sliding fit setting of the push rod 200 and the guiding hole 11, the guiding smoothness of the reciprocating movement of the push rod 200 can be effectively improved.
[0032] Further, the return channel includes a communication groove 14 recessed on the first side 10, and the communication groove 14 penetrates the hole wall of the guiding hole 11. Through the setting that the communication groove 14 penetrates the hole wall of the guiding hole 11, it is convenient to open the connection groove, and the return groove 13 is directly communicated with the outer periphery of the push rod 200, facilitating the return of the lubricating oil between the outer periphery of the push rod 200 and the return groove 13, and avoiding the accumulation of the lubricating oil between the return groove 13 and the push rod 200, improving the return effect of the return channel. Of course, in other embodiments, the communication groove 14 is spaced from the guiding hole 11, and the communication groove 14 is only communicated with the return groove 13, that is, part of the lubricating oil on the outer periphery of the push rod 200 is pre-scraped into the return groove 13, and the lubricating oil in the return groove 13 is then returned to the box body 100 through the communication groove 14.
[0033] Furthermore, as Figure 2 、 Figure 3 and Figure 4 shown, at least part of the groove wall of the communication groove 14 is inclined, and the inclined groove wall of the communication groove 14 is the first inclined groove wall 141, and the first inclined groove wall 141 is inclined from the end far from the first side 10 towards the end close to the first side 10 and away from the central axis direction of the guiding hole 11. Through the setting of the first inclined groove wall 141, the opening size of the communication groove 14 adjacent to the first side 10 is larger than the opening size of the communication groove 14 far from the first side 10, so as to facilitate the export of the lubricating oil in the return groove 13. It can be understood that the return groove 13 adjacent to the first side 10 is adjacent to the inside of the box body 100, and the lubricating oil accumulated in this return groove 13 will be more than that in the return groove 13 arranged far from the first side 10. Therefore, the setting that the opening size of the communication groove 14 adjacent to the first side 10 is larger than the opening size of the communication groove 14 far from the first side 10 can reduce the return pressure at one end of the communication groove 14 adjacent to the first side 10, facilitating the timely return of the lubricating liquid in each return groove 13 to the box body 100.
[0034] Preferably, as Figure 4 shown, the included angle between the first inclined groove wall 141 and the central axis of the guiding hole 11 is θ, and 30° ≤ θ ≤ 45°. For example, the included angles between the first inclined groove wall 141 and the central axis of the guiding hole 11 are 30°, 35°, 37°, 40°, 45°, etc. Such a moderate included angle has a good flow guiding effect, avoiding excessive backflow pressure in the guiding groove due to too small an included angle, which may cause lubricating fluid to accumulate in the backflow groove 13, and also avoiding excessive material removal due to too large an included angle, which may affect the structural stability of the mounting seat 1.
[0035] Furthermore, the backflow groove 13 communicates with the mounting groove 12. The lubricating oil sealed and rubbed by the oil seal 2 in the mounting groove 12 and the lubricating oil in the backflow groove 13 both flow back to the box body 100 through the communicating groove 14. In other embodiments, the backflow channel further includes a backflow hole opened on the first side 10. The backflow hole extends along the central axis of the guiding hole 11 and communicates with the mounting groove 12. At this time, the lubricating oil in the backflow groove 13 flows back to the box body 100 through the communicating groove 14, and the lubricating oil isolated and blocked by the oil seal 2 flows back to the box body 100 through the backflow hole, avoiding the mutual influence of the lubricating oil between the backflow groove 13 and the mounting groove 12. Through the pre-scraping of the lubricating oil on the outer periphery of the push rod 200 by the backflow groove 13 and the backflow of the communicating groove 14, the pressure of the lubricating oil rubbed by the oil seal 2 accumulated in the mounting groove 12 is effectively reduced, thereby reducing the backflow pressure of the backflow hole and ensuring the overall backflow effect of the lubricating oil.
[0036] In some embodiments, as Figure 2 、 Figure 3 and Figure 4 shown, the mounting seat 1 includes a detachable seat body 15 and an end cover 16. The mounting seat 1 is provided with a first communication hole 151 for the push rod 200 to pass through. A plurality of backflow grooves 13 are provided on the hole wall of the first communication hole 151. The end cover 16 is provided with a second communication hole 161 corresponding to the first communication hole 151. The first communication hole 151 and the second communication hole 161 form the guiding hole 11. One side of the seat body 15 adjacent to the end cover 16 is the second side 17. An installation groove 12 is annularly arranged along the outer periphery of the first communication hole 151 on the second side 17. The oil seal 2 is clamped between the bottom of the installation groove 12 and the end cover 16. By splitting the integral component of the mounting seat 1 into two parts, it is convenient for processing and reduces production costs. Setting the oil seal 2 between the seat body 15 and the end cover 16 facilitates the installation and disassembly and replacement of the oil seal 2. During maintenance, only the end cover 16 needs to be removed to replace the oil seal 2.
[0037] Exemplarily, a plurality of threaded holes are annularly and evenly arranged around the central axis of the first communication hole 151 on the second side 17 of the seat body 15. Through holes corresponding to the threaded holes are provided on the end cover 16. Bolts pass through the through holes and are screwed into the threaded holes to connect the end cover 16 and the seat body 15. The connection by bolts is stable and convenient for disassembly and assembly. In other embodiments, other methods such as snap fits can also be used to achieve detachable connection.
[0038] Furthermore, the push rod oil seal device further includes a sealing ring, and a sealing ring is provided between the seat body 15 and the end cover 16. Through the arrangement of the sealing ring, the sealing performance between the seat body 15 and the end cover 16 is enhanced, and the leakage of lubricating oil is reduced. Preferably, a limiting groove 162 is recessed on the side of the end cover 16 facing the seat body 15, and the sealing ring is arranged in the limiting groove 162, effectively improving the installation position accuracy of the sealing ring.
[0039] Optionally, the seat body 15 is detachably connected to the box body 100, and a sealing ring is provided between the seat body 15 and the box body 100. Through the arrangement of the sealing ring, the connection sealing performance between the seat body 15 and the box body 100 is enhanced, and the leakage of lubricating oil in the box body 100 is avoided. It can be understood that through holes are provided on the seat body 15, and threaded blind holes are provided on the box body 100. Bolts pass through the through holes and are screwed into the threaded blind holes to achieve the connection between the seat body 15 and the box body 100. The connection by bolts is stable and convenient for disassembly and assembly.
[0040] Furthermore, the seat body 15 includes a main body portion 152 and a positioning portion 153 provided on the side of the main body portion 152 facing the box body 100. The main body portion 152 is installed on the box body 100, and an installation hole is provided on the box body 100. The positioning portion 153 is inserted into the installation hole. Through the cooperation of the positioning portion 153 and the installation hole, that is, in addition to the contact surface between the main body portion 152 of the seat body 15 and the box body 100, there is also a contact surface between the positioning portion 153 and the hole wall of the installation hole, effectively improving the sealing performance between the seat body 15 and the box body 100. At the same time, by inserting the positioning portion 153 into the installation hole, the installation positioning accuracy of the seat body 15 can be effectively enhanced, thereby improving the convenience of installing the seat body 15.
[0041] Optionally, the oil seal 2 includes a fixing portion 21 and an extending portion 22 disposed on a side of the fixing portion 21 away from the end cover 16. The fixing portion 21 is disposed in the mounting groove 12, and the extending portion 22 at least partially extends into the return groove 13 adjacent to the mounting groove 12. Compared with the fixing portion 21 directly rubbing against the push rod 200, the arrangement of the extending portion 22 can strengthen the contact surface with the push rod 200, thereby improving the oil sealing effect of the oil seal 2. By arranging the extending portion 22 to extend into the return groove 13, when the push rod 200 slides outward, the lubricating oil adhering to the outer periphery of the push rod 200 is first rubbed by each return groove 13 and then rubbed by the extending portion 22 into the return groove 13 adjacent to the mounting groove 12, reducing the occurrence of the situation where the lubricating oil accumulates at the mounting groove 12 and squeezes the oil seal 2.
[0042] Furthermore, a diversion groove 18 is annularly recessed along the central axis of the guide hole 11 on the first side 10. The groove wall of the diversion groove 18 adjacent to the central axis of the guide hole 11 is a second inclined groove wall 181, and the second inclined groove wall 181 intersects with the hole wall of the guide hole 11 at an angle. By arranging the diversion groove 18, when the push rod 200 slides outward along the central axis of the guide hole 11, the lubricating oil brought out of the box body 100 by the push rod 200 can be blocked by the diversion groove 18 first. The inclined setting of the second inclined groove wall 181 facilitates the diversion of the lubricating oil blocked by the outer periphery of the push rod 200 by the diversion groove 18, reduces the resistance of the lubricating oil rubbed by the periphery of the guide hole 11 during the movement of the push rod 200, and enables the lubricating oil to be more smoothly introduced into the diversion groove 18 along the second inclined groove wall 181.
[0043] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A push rod oil seal device, characterized in that: It includes a mounting seat and an oil seal, the mounting seat has a first side adjacent to the housing, the mounting seat is provided with a guide hole through the first side, the guide hole is slidably matched with the push rod, the hole wall of the guide hole is provided with a mounting groove in an annular recess around the central axis of the guide hole, the oil seal is clamped in the mounting groove and has an interference fit with the outer periphery of the push rod, the hole wall of the guide hole is provided with a plurality of reflux grooves at intervals along its own axial direction, all of the reflux grooves are arranged in an annular manner along the central axis of the guide hole, and all of the reflux grooves are located between the first side and the mounting groove, the first side is provided with a reflux channel, the reflux channel extends along the central axis direction of the guide hole and is connected with all of the reflux grooves.
2. The push rod oil seal device according to claim 1, characterized in that: The reflux channel includes a communicating groove which is recessed on the first side, and the communicating groove passes through the hole wall of the guide hole.
3. The push rod oil seal device according to claim 2, characterized in that: The groove wall of the connecting groove is at least partially inclined, and the inclined groove wall of the connecting groove is a first inclined groove wall, which is inclined from an end away from the first side toward an end close to the first side and away from the central axis of the guide hole.
4. The push rod oil seal device according to claim 3, characterized in that: The first inclined groove wall and the central axis of the guide hole have an inclined angle of θ, 30°≤θ≤45°.
5. The push rod oil seal device according to claim 2, characterized in that: The communicating groove is in communication with the mounting groove; and / or, The reflux channel further includes a reflux hole opened on the first side, wherein the reflux hole extends along the central axis of the guide hole and is connected to the mounting groove.
6. The push rod oil seal device according to any one of claims 1 to 5, characterized in that: The mounting seat includes a detachably connected seat body and an end cover, the mounting seat is penetrated by a first connecting hole for the push rod to pass through, a plurality of reflux grooves are arranged on the hole wall of the first connecting hole, the end cover is provided with a second connecting hole corresponding to the first connecting hole, the first connecting hole and the second connecting hole are combined into the guide hole, the side of the seat body adjacent to the end cover is the second side, the second side is provided with the mounting groove in an annular shape along the outer periphery of the first connecting hole, and the oil seal is arranged between the bottom of the mounting groove and the end cover.
7. The push rod oil seal device according to claim 6, characterized in that: It also includes a sealing ring, which is arranged between the seat body and the end cover; and / or, The seat body is detachably connected to the box body, and the sealing ring is arranged between the seat body and the box body.
8. The push rod oil seal device according to claim 7, characterized in that: The seat body comprises a main body and a positioning part arranged on a side of the main body facing the box body, the main body is installed on the box body, a mounting hole is arranged on the box body, and the positioning part is inserted into the mounting hole.
9. The push rod oil seal device according to claim 6, characterized in that: The oil seal comprises a fixing portion and an extending portion arranged on a side of the fixing portion away from the end cover, the fixing portion is arranged in the mounting groove, and the extending portion at least partially extends into the reflux groove adjacent to the mounting groove.
10. The push rod oil seal device according to any one of claims 1 to 5, characterized in that: The first side is provided with a guide groove in an annular depression along the central axis of the guide hole, and the groove wall of the guide groove adjacent to the central axis of the guide hole is a second inclined groove wall, which is arranged at an angle to the hole wall of the guide hole and intersects with it.