Three-bearing clearance adjusting mechanism
By designing a three-bearing clearance adjustment mechanism containing multiple bearings and limiting components, the problem of the eccentric mechanism easily generating gaps after the roll shaft in the printing press is solved, and more stable mechanical properties are achieved.
Patent Information
- Application Number
- CN202421683190.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In existing printing machines, the roll shaft rotates and drives the eccentric mechanism to move, which easily creates gaps during long-term work, reducing working stability.
A three-bearing gap adjustment mechanism is designed, including a roll shaft, an eccentric sleeve for roll, a retaining ring for eccentric sleeve shaft, a first needle roller bearing, a spacer for radial bearing of roll, a rotary sealing seat for roll, a second needle roller bearing, an eccentric sleeve outer eccentric sleeve bearing spacer and a roller base. Through the cooperation of these components, the stable rotation of the plate roller shaft and the effective limit of the eccentric mechanism are achieved.
Through the three-bearing clearance adjustment mechanism, the rotation stability of the plate roller shaft and the working stability of the eccentric mechanism are improved, the generation of gaps is reduced, and the overall mechanical performance is improved.
Smart Images
Figure CN222742371U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing rollers, in particular to a three-bearing gap adjusting mechanism. Background Art
[0002] The eccentric sleeve is a special sliding bearing whose inner and outer circle centers do not coincide. The distance between the inner and outer circle centers is called the eccentric distance. The working principle of the eccentric sleeve is based on the offset of its inner and outer circle centers, so that when it rotates, the inner circle center and the axis rotate around the outer circle center, thereby realizing a specific mechanical movement. This structure enables the eccentric sleeve to play an important role in the mechanical system, especially in situations where the center distance between shafts needs to be adjusted. Eccentric sleeves are widely used. For example, in offset printing machines, the eccentric sleeve achieves precise printing effects by adjusting the position of the printing cylinder.
[0003] At present, most printing machines use a gap between the plate roller and the transfer roller, and the plate roller rotates to print the paper passing through the gap between the plate roller and the transfer roller. When the existing plate roller is working, it generally rotates the plate roller shaft, so that the plate roller shaft rotates and drives the eccentric mechanism to move. When working for a long time, a gap is easily generated between the eccentric mechanism and the plate roller, thereby reducing the working stability. Utility Model Content
[0004] The purpose of the utility model is to provide a three-bearing gap adjustment mechanism to solve the problem proposed in the above-mentioned background technology that the eccentric mechanism is driven to move after the rotation of the plate roller shaft, and a gap is easily generated between the eccentric mechanism and the plate roller during long-term operation, thereby reducing the working stability.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-bearing gap adjustment mechanism, including a plate roller shaft, an outer surface of one end of which is provided with an eccentric sleeve for the plate roller, an outer surface of one end of the eccentric sleeve for the plate roller is installed with an eccentric sleeve shaft bearing ring, a first needle roller bearing is arranged between the outer surface of one end of the eccentric sleeve for the plate roller and the inner wall of the eccentric sleeve shaft bearing ring, an outer surface of one end of the plate roller shaft is provided with a plate roller radial bearing spacer, a plate roller rotary sealing seat is installed on the side of the plate roller radial bearing spacer, a second needle roller bearing is arranged on the outer surface of the eccentric sleeve for the plate roller, a plurality of the second needle roller bearings are provided with plate roller outer eccentric sleeve bearing spacers, and a plate roller base is arranged on the outer side of the plate roller outer eccentric sleeve bearing spacer.
[0006] Preferably, a step is provided on the outer surface of one end of the plate roller shaft facing the bearing ring for the eccentric sleeve shaft, an opening is provided on the surface of the eccentric sleeve for the plate roller, and the opening of the eccentric sleeve for the plate roller is eccentrically designed.
[0007] By adopting the above technical scheme, a step is provided on the outer surface of one end of the plate roller shaft facing the eccentric sleeve shaft with a bearing ring, so that the plate roller shaft can be fixed by the step. The eccentric design of the eccentric sleeve of the plate roller is convenient for installing the plate roller shaft through the opening of the eccentric sleeve of the plate roller, so that after the plate roller shaft rotates, the eccentric sleeve of the plate roller can be driven to rotate eccentrically to work.
[0008] Preferably, the eccentric sleeve for the plate roller and the bearing ring for the eccentric sleeve shaft are fixedly connected by bolts.
[0009] By adopting the above technical scheme, the eccentric sleeve for the plate roller is fixedly connected with the bearing ring for the eccentric sleeve shaft, so that the bearing ring for the eccentric sleeve shaft can limit the eccentric sleeve for the plate roller, and it is also beneficial to limit and fix the parts on the surface of the eccentric sleeve for the plate roller.
[0010] Preferably, the side surface of the spacer ring for the radial bearing of the plate roller fits with the side surface of the rotary seal seat for the plate roller, the rotary seal seat for the plate roller is annular in design, and the opening of the rotary seal seat for the plate roller is penetrated by the plate roller shaft.
[0011] By adopting the above technical scheme, the annular design of the rotating seal seat for the plate roller makes it easier for the rotating seal seat for the plate roller to seal the plate roller shaft through the sealing structure on the surface, and the rotating seal seat for the plate roller is isolated by the spacer ring of the plate roller radial bearing to improve the protection performance.
[0012] Preferably, the inner surface of the second needle roller bearing fits with the outer surface of the eccentric sleeve for the plate roller, and the outer surface of the second needle roller bearing fits with the inner surface of the plate roller base.
[0013] By adopting the above technical solution, the inner and outer surfaces of the second needle roller bearing are respectively fitted with the eccentric sleeve for the plate roller and the plate roller base, so that the friction of the second needle roller bearing is reduced after rotation, thereby improving the working stability of the device.
[0014] Preferably, the vertical cross-section of the outer eccentric sleeve bearing spacer of the printing roller is designed to be arc-shaped, and the outer eccentric sleeve bearing spacer of the printing roller is fixed to the eccentric sleeve for the printing roller by bolts.
[0015] By adopting the above technical scheme, the arc-shaped design of the outer eccentric sleeve bearing spacer of the plate roller in the vertical direction allows the outer eccentric sleeve bearing spacer of the plate roller to separate the second needle bearing, thereby not interfering with the operation of the eccentric sleeve for the plate roller and the opening at the lower end of the plate roller base, and the stability is improved by connecting the outer eccentric sleeve bearing spacer of the plate roller with the eccentric sleeve for the plate roller through bolts.
[0016] Preferably, bearing spacers are installed between the first needle roller bearings, and the bearing spacers are hollow in design.
[0017] By adopting the above technical solution, the bearing spacers are arranged between the first needle roller bearings, so that the first needle roller bearings do not rub against each other, which helps to increase the stability when the first needle roller bearings rotate. The hollow design of the bearing spacers is conducive to increasing the buffering performance, thereby increasing the protective performance of the device for the first needle roller bearing.
[0018] Compared with the prior art, the utility model has the following beneficial effects: the three-bearing clearance adjustment mechanism:
[0019] 1. An eccentric sleeve for the plate roller and a retaining ring for the eccentric sleeve shaft are provided, so that when the device is working, the plate roller shaft is conveniently stored through the eccentric sleeve for the plate roller, so that when the plate roller shaft rotates, the plate roller base is driven to rotate through the eccentric sleeve for the plate roller, which is convenient for the device to work eccentrically, and the eccentric sleeve for the plate roller is conveniently limited through the retaining ring for the eccentric sleeve shaft, and the plate roller shaft is limited by the eccentric sleeve for the plate roller, which improves the installation and fixing efficiency of the device;
[0020] 2. A first needle roller bearing and a second needle roller bearing are provided, so that when the device is working, the first needle roller bearing is used to support the plate roller shaft and the eccentric sleeve for the plate roller, thereby improving the smoothness of rotation, and the second needle roller bearing is used to support the eccentric sleeve for the plate roller and the plate roller base, thereby improving the overall stability. When working, the first needle roller bearing and the second needle roller bearing are used to increase the stability of the installation;
[0021] 3. An outer eccentric sleeve bearing spacer and a bearing spacer are provided, so that when the device is working, the second needle roller bearings are limited by the outer eccentric sleeve bearing spacer, ensuring that the second needle roller bearing will not move axially, thereby improving the stability of the installation of the second needle roller bearing, and the bearing spacer fits the side surface of the first needle roller bearing, thereby increasing the buffering performance between the first needle roller bearings, which is beneficial for the device to adjust the positions of the three first needle roller bearings through the openings on the lower surface of the plate roller base and the eccentric sleeve of the plate roller, thereby facilitating the clearance adjustment of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of the utility model;
[0023] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;
[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the rotary seal seat for the plate roller of the utility model;
[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model in which the roller shaft and the eccentric sleeve shaft are connected by a retaining ring;
[0026] Figure 5This is a schematic diagram of the three-dimensional structure of the eccentric sleeve for the plate roller and the plate roller base connected to the utility model;
[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the second needle roller bearing and the outer eccentric sleeve bearing spacer sleeve of the plate roller connected to the utility model.
[0028] In the figure: 1. plate roller shaft; 2. eccentric sleeve for plate roller; 3. bearing ring for eccentric sleeve shaft; 4. first needle roller bearing; 5. spacer ring for plate roller radial bearing; 6. rotary seal seat for plate roller; 7. second needle roller bearing; 8. spacer ring for plate roller outer eccentric sleeve bearing; 9. plate roller base; 10. bearing spacer ring. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] See also Figure 1-6 The utility model provides a technical solution: a three-bearing gap adjustment mechanism, including a plate roller shaft 1, an eccentric sleeve 2 for a plate roller, a bearing and retaining ring 3 for an eccentric sleeve shaft, a first needle roller bearing 4, a spacer ring 5 for a plate roller radial bearing, a rotary seal seat 6 for a plate roller, a second needle roller bearing 7, a plate roller outer eccentric sleeve bearing spacer 8, a plate roller base 9 and a bearing spacer ring 10, the plate roller shaft 1, the outer surface of one end of which is provided with an eccentric sleeve 2 for a plate roller, the outer surface of one end of the eccentric sleeve 2 for the plate roller is provided with a bearing and retaining ring 3 for an eccentric sleeve shaft, the plate roller shaft 1 faces the eccentric sleeve shaft A step is provided on the outer surface of one end of the bearing ring 3, an opening is provided on the surface of the eccentric sleeve 2 for the plate roller, and the opening of the eccentric sleeve 2 for the plate roller is eccentrically designed, the eccentric sleeve 2 for the plate roller and the bearing ring 3 for the eccentric sleeve shaft are fixedly connected by bolts. When using the device, three first needle roller bearings 4 are sleeved on the outer surface of the plate roller shaft 1, and then the first needle roller bearings 4 are separated by bearing spacers 10. The two ends of the device are positioned by the bearing ring 3 for the eccentric sleeve shaft, the spacer 5 for the plate roller radial bearing and the rotating sealing seat 6 for the plate roller.
[0031] A first needle roller bearing 4 is arranged between the outer surface of one end of the eccentric sleeve 2 for the plate roller and the inner wall of the bearing ring 3 for the eccentric sleeve shaft, and a spacer ring 5 for the radial bearing of the plate roller is arranged on the outer surface of one end of the plate roller shaft 1. The side surface of the spacer ring 5 for the radial bearing of the plate roller fits with the side surface of the rotary seal seat 6 for the plate roller. The rotary seal seat 6 for the plate roller is annular in design, and the opening of the rotary seal seat 6 for the plate roller is penetrated by the plate roller shaft 1. The inner surface of the second needle roller bearing 7 fits with the outer surface of the eccentric sleeve 2 for the plate roller, and the second needle roller bearing 7 is provided on the outer surface of the eccentric sleeve 2 for the plate roller. The outer surface of the bearing 7 fits with the inner surface of the plate roller base 9, and the eccentric sleeve 2 for the plate roller is inserted into the outer side of the plate roller shaft 1. The two first needle roller bearings 4 at both ends are tightly matched with the eccentric sleeve 2 for the plate roller. At this time, a certain gap is left between the first needle roller bearing 4 and the eccentric sleeve 2 for the plate roller, and two second needle roller bearings 7 are inserted into the outer side of the eccentric sleeve 2 for the plate roller, and the two second needle roller bearings 7 are separated by the outer eccentric sleeve bearing spacer 8 of the plate roller, and finally the plate roller base 9 is put on the outside of the eccentric sleeve 2 for the plate roller.
[0032] A rotating seal seat 6 for the plate roller is installed on the side of the spacer ring 5 for the radial bearing of the plate roller, a second needle roller bearing 7 is arranged on the outer surface of the eccentric sleeve 2 for the plate roller, an outer eccentric sleeve bearing spacer 8 for the plate roller is arranged between several second needle roller bearings 7, and a plate roller base 9 is arranged on the outer side of the outer eccentric sleeve bearing spacer 8 for the plate roller, the vertical cross-section of the outer eccentric sleeve bearing spacer 8 for the plate roller is arc-shaped, and the outer eccentric sleeve bearing spacer 8 for the plate roller is fixed to the eccentric sleeve 2 for the plate roller by bolts, and bearing spacers 10 are installed between several first needle roller bearings 4, and the bearing spacers 10 are hollow in design, and the openings on the lower surfaces of the eccentric sleeve 2 for the plate roller and the plate roller base 9 can facilitate the adjustment of the first needle roller bearing 4, thereby changing the gap between the first needle roller bearing 4 and the eccentric sleeve 2 for the plate roller.
[0033] Working principle: When using the three-bearing clearance adjustment mechanism, the first needle roller bearing 4 is sleeved on the outer surface of the plate roller shaft 1, and the first needle roller bearing 4 is separated by a bearing spacer 10, and positioned by an eccentric sleeve shaft bearing ring 3, a plate roller radial bearing spacer 5 and a plate roller rotating seal seat 6, and two second needle roller bearings 7 are sleeved on the outer side of the eccentric sleeve 2 for the plate roller, and the second needle roller bearings 7 are spaced by the outer eccentric sleeve bearing spacer 8 of the plate roller, so that the eccentric sleeve 2 for the plate roller is sleeved on the outside of the plate roller base 9, and finally, the first needle roller bearing 4 is adjusted through the openings of the eccentric sleeve 2 for the plate roller and the plate roller base 9 to change the clearance for use, thereby increasing the overall practicality.
[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A three-bearing gap adjustment mechanism, comprising a plate roller shaft (1), the outer surface of one end of which is sleeved with an eccentric sleeve (2) for the plate roller, characterized in that: An eccentric sleeve shaft bearing ring (3) is installed on the outer surface of one end of the eccentric sleeve (2) for the plate roller, a first needle roller bearing (4) is arranged between the outer surface of one end of the eccentric sleeve (2) for the plate roller and the inner wall of the eccentric sleeve shaft bearing ring (3), an outer surface of one end of the plate roller shaft (1) is provided with a plate roller radial bearing spacer (5), a plate roller rotary seal seat (6) is installed on the side of the plate roller radial bearing spacer (5), a second needle roller bearing (7) is arranged on the outer surface of the eccentric sleeve (2) for the plate roller, a plate roller outer eccentric sleeve bearing spacer (8) is arranged between a plurality of the second needle roller bearings (7), and a plate roller base (9) is arranged on the outer side of the plate roller outer eccentric sleeve bearing spacer (8).
2. A three-bearing clearance adjustment mechanism according to claim 1, characterized in that: The outer surface of one end of the plate roller shaft (1) facing the bearing ring (3) for the eccentric sleeve shaft is provided with a step, and the surface of the eccentric sleeve (2) for the plate roller is provided with an opening, and the opening of the eccentric sleeve (2) for the plate roller is eccentrically designed.
3. A three-bearing clearance adjustment mechanism according to claim 1, characterized in that: The eccentric sleeve (2) for the plate roller and the bearing ring (3) for the eccentric sleeve shaft are fixedly connected by bolts.
4. A three-bearing clearance adjustment mechanism according to claim 1, characterized in that: The side surface of the spacer ring (5) for the plate roller radial bearing fits with the side surface of the plate roller rotary seal seat (6); the plate roller rotary seal seat (6) is annular in design, and the opening of the plate roller rotary seal seat (6) is penetrated by the plate roller shaft (1).
5. The three-bearing clearance adjustment mechanism according to claim 1, characterized in that: The inner surface of the second needle roller bearing (7) fits in contact with the outer surface of the eccentric sleeve (2) for the plate roller, and the outer surface of the second needle roller bearing (7) fits in contact with the inner surface of the plate roller base (9).
6. A three-bearing clearance adjustment mechanism according to claim 1, characterized in that: The vertical cross section of the outer eccentric sleeve bearing spacer (8) of the plate roller is designed to be arc-shaped, and the outer eccentric sleeve bearing spacer (8) of the plate roller is fixed to the eccentric sleeve (2) for the plate roller by bolts.
7. The three-bearing clearance adjustment mechanism according to claim 1, characterized in that: A bearing spacer (10) is installed between the plurality of first needle roller bearings (4), and the bearing spacer (10) is of hollow design.