CN214771724U

CN214771724U - Special tool for disassembling bearing inner sleeve of printing machine

Info

Publication number: CN214771724U
Application number: CN202120187698.8U
Authority: CN
Inventors: 王彬; 凌云
Original assignee: Chongqing Chongbao Printing Co ltd
Current assignee: Chongqing Chongbao Printing Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-11-19
Anticipated expiration: 2031-01-21

Abstract

The utility model relates to the technical field of printing machines, in particular to a special tool for disassembling a bearing inner sleeve of a printing machine, which comprises an expansion nut, wherein the expansion nut is a hollow nut for a jacking screw rod to act inside; a jack-out screw configured to expand one end of the pop-out nut; a pin puller configured to pull out the pop-up nut by an instantaneous impact; the internal shape of the expansion nut is matched with the shape of the ejection screw rod, and the expansion nut and the ejection screw rod are interacted through threads; the nut head of the spreading nut is in a round table shape, the nut head is crossly split, the split length extends to the middle of the spreading nut, the tail of the spreading nut is tapped and milled into a first square, and a tapered hole penetrates through the spreading nut; the utility model aims to overcome the inconvenient problem of bearing dismantlement on the current small-size printing machine.

Description

Special tool for disassembling bearing inner sleeve of printing machine

Technical Field

The utility model relates to a printing machine technical field, especially a special tool of bearing endotheca is dismantled to printing machine.

Background

The small-sized printing machine is provided with the needle roller bearings used at two ends of the water transfer roller, the needle roller bearings are corroded by fountain solution and are easy to damage, the outer sleeve is not easy to take off after the needle roller bearings are damaged, the common method is to pry the needle roller bearings by using things such as a screwdriver, and the bearings are difficult to be used for tighter bearings because the bearing positions are blind holes and no fulcrum exists; in another method, a destroying method is adopted, one side of the shaft sleeve is spread or chipped by a chisel, and then the bearing is taken out. Both of these methods are also possible for occasional operation or loose sleeves, but are not easy and reliable and are inefficient.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned weak point that exists among the prior art, the utility model aims to overcome the bearing on the current small-size printing machine and dismantle inconvenient problem.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a special tool for disassembling a bearing inner sleeve of a printing machine comprises an expansion nut, wherein the expansion nut is a hollow nut and is used for a jacking screw to act inside; a jack-out screw configured to expand one end of the pop-out nut; a pin puller configured to pull out the pop-up nut by an instantaneous impact; wherein, the internal shape of the expansion nut and the shape of the ejection screw are mutually matched, and the expansion nut and the ejection screw interact through threads.

Further, the nut head of the expansion nut is round platform-shaped, the nut head is cut open in a cross mode, the cut open length extends to the middle of the expansion nut, the tail of the expansion nut 1 is tapped and milled into a first four aspects, and the expansion nut is provided with a taper hole inside and penetrates through the expansion nut.

Furthermore, one end of the jacking screw rod is a conical table and used for expanding the expanding nut, and the other end of the jacking screw rod is milled into the fourth aspect.

Further, the pin puller comprises a sliding rod and a sliding hammer, wherein a mounting groove matched with the tail of the nut is formed in one end of the sliding rod, a baffle is arranged at the other end of the sliding rod, and the sliding hammer is in a circular ring shape and slides on the sliding rod.

Further, the diameter of the conical hole of the expansion nut is smaller than that of the conical table of the jacking screw rod.

Furthermore, the taper hole of the expansion nut and the taper platform of the ejection screw are matched with each other through threads.

Further, the mounting groove of the slide bar is matched with the first square tail of the expansion nut through threads.

The utility model has the advantages that: compared with other methods, the special tool for disassembling the needle bearing inner sleeve is simpler and more convenient to operate, is more stable and reliable, does not damage the bearing outer matching surface, and meanwhile, the method is high in working efficiency, saves time in maintenance work, improves the use efficiency of equipment, and reduces corresponding cost.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic diagram of the operation of the present invention;

description of reference numerals: the expanding nut 1, the ejecting screw 2, the nut head 11, the first fourth aspect 12, the taper hole 13, the taper table 21, the second fourth aspect 23, the slide rod 3, the slide hammer 4, the mounting groove 31, the baffle 32, the bearing seat 5 and the bearing 6.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Example (b):

as shown in fig. 1 to 3, the expanding nut 1 is constructed as a hollow nut for the inside of which the jack-out screw 2 acts; one end of the jacking screw rod 2 used for expanding the expansion nut 1 is opened; the pin puller is used for pulling out the expansion nut 1 through instant impact; wherein the internal shape of the expansion nut 1 and the shape of the ejection screw 2 are matched with each other, and the two interact with each other through threads.

As shown in fig. 1 to 3, the nut head 11 of the pop-up nut 1 is in the shape of a circular truncated cone, the nut head 11 is cross-sectioned, and the sectioned length extends to the middle of the pop-up nut 1, so that the nut head 11 can change the diameter, the specific situation of the change is determined according to the size of the taper hole 13, and when a smaller bearing is encountered, the nut head 11 can first reduce the diameter and then pass through the bearing; the tail part of the expansion nut 1 is tapped and milled into a first fourth surface 12, the tapping function is matched with the sliding rod 3, the sliding rod 3 can lock the expansion nut 1 through threads, so that the expansion nut 1 and a bearing can be pulled out, and the fourth surface is milled so that a worker can use a spanner or other tools to conveniently twist the expansion nut 1; the interior of the expanding nut 1 is a taper hole 13 and penetrates through the expanding nut 1.

As shown in fig. 1 to 3, one end of the back-off screw 2 is a tapered platform 21 for expanding the back-off nut 1, the other end of the back-off screw 2 is milled into a fourth aspect 23, the diameter of the tapered hole 13 of the back-off nut 1 is smaller than the diameter of the tapered platform 21 of the back-off screw 2, the tapered hole 13 of the back-off nut 1 and the tapered platform 21 of the back-off screw 2 are matched with each other through threads, and when the back-off screw 2 is turned by four directions of the tail, the back-off nut 1 is continuously expanded so as to finally clamp the bearing.

As shown in fig. 1 to 3, the pin puller includes a sliding rod 3 and a sliding hammer 4, wherein an installation groove 31 for the tail of the expansion nut 1 to fit is provided inside one end of the sliding rod 3, a baffle 32 is provided at the other end of the sliding rod 3, the sliding hammer 4 is configured in a circular ring shape and slides on the sliding rod 3, the installation groove 31 of the sliding rod 3 and the tail of the square surface 12 of the expansion nut 1 are in threaded fit, the sliding hammer 4 slides on the sliding rod 3, the sliding rod 3 has a large impact force by the instant impact force of the baffle 32, and the working mode is repeated continuously, so that the bearing on the expansion nut 1 fitted with the sliding rod 3 can be taken out.

The working principle is as follows: firstly, cleaning damaged roller pins in a bearing and sundries on a retainer, then placing an expansion nut into a bearing hole, clamping the nut by a wrench, screwing a jacking screw into the nut, expanding the nut as hard as possible to clamp an inner roll part of a bearing inner sleeve, and finally easily pulling out the bearing inner sleeve by a pin puller.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a specialized tool of bearing endotheca is dismantled to printing machine which characterized in that:

the nut structure comprises an expansion nut (1), wherein the expansion nut (1) is a hollow nut for the internal action of a jacking screw rod (2);

the ejection screw (2), the ejection screw (2) is used for expanding one end of the expansion nut (1);

a pin puller configured to pull out the pop-up nut (1) by a momentary impact;

wherein, the internal shape of the expansion nut (1) is matched with the shape of the ejection screw (2), and the expansion nut and the ejection screw interact through threads.

2. The special tool for disassembling the bearing inner sleeve of the printing machine as claimed in claim 1, wherein: the nut head (11) of the split nut (1) is round platform-shaped, the nut head (11) is crossed and cut open, and cut open the middle part that the length extends to the split nut (1), the afterbody tapping of the split nut (1), and mill into first four aspects (12), the inside of the split nut (1) is the bell mouth (13), and runs through the split nut (1).

3. The special tool for disassembling the bearing inner sleeve of the printing machine as claimed in claim 2, wherein: one end of the jacking screw rod (2) is a conical table (21) and is used for expanding the jacking nut (1), and the other end of the jacking screw rod (2) is milled into a fourth aspect (23).

4. A special tool for disassembling an inner sleeve of a bearing in a printing machine according to claim 3, wherein: the pin puller comprises a sliding rod (3) and a sliding hammer (4), wherein the inside of one end of the sliding rod (3) is provided with a mounting groove (31) matched with the tail of the expanding nut (1), the other end of the sliding rod (3) is provided with a baffle (32), and the sliding hammer (4) is in a circular ring shape and slides on the sliding rod (3).

5. The special tool for disassembling the bearing inner sleeve of the printing machine as claimed in claim 4, wherein: the diameter of the conical hole (13) of the expansion nut (1) is smaller than that of the conical table (21) of the ejection screw (2).

6. The special tool for disassembling the bearing inner sleeve of the printing machine as claimed in claim 4, wherein: the conical hole (13) of the expansion nut (1) is matched with the conical table (21) of the ejection screw rod (2) through threads.

7. The special tool for disassembling the bearing inner sleeve of the printing machine as claimed in claim 4, wherein: the mounting groove (31) of the sliding rod (3) is matched with the tail of the first fourth aspect (12) of the expansion nut (1) through threads.