Combined structure of guide pillar and guide sleeve

Abstract

The utility model belongs to the technical field of press machines, and particularly relates to a guide pillar and guide sleeve combined structure which comprises a guide sleeve body and a guide pillar body, a lining body is installed in the guide sleeve body, the material hardness of the guide sleeve body and the guide pillar body is larger than that of the lining body, and the guide pillar body is connected into the lining body in a sliding mode. The guide sleeve body and the guide column body are both made of nodular cast iron, the lining body is made of copper, an oil guide hole is formed in the lining body, an oil groove communicated with the oil guide hole is formed in the inner wall of the lining body, and the lining body is installed in the guide sleeve body through a screw. Abrasion damage to the guide sleeve body and the guide column body can be effectively reduced, the service life of the guide sleeve body and the guide column body is prolonged, meanwhile, only the lining body with the large abrasion loss needs to be replaced during maintenance, replacement is easier, replacement cost is lower, and maintenance cost is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of presses, and specifically relates to a combined structure of a guide column and a guide sleeve. Background Art

[0002] The guide pin and guide sleeve structure can effectively improve the accuracy and stability of the machine tool and is an important component of the closed double-point press;

[0003] The existing guide pin and guide sleeve structure is as follows Figure 1 As shown, it is composed of a guide sleeve and a guide post. The inner hole of the guide sleeve is processed with an oil groove to ensure that the guide post is adequately lubricated when it reciprocates in the guide sleeve.

[0004] Since both the guide sleeve and the guide column are made of ductile iron, even with lubricating oil, mutual wear between the guide column and the guide sleeve cannot be avoided. As the years of use increase, the clearance between the two will increase, thus affecting the accuracy and reliability of the machine tool.

[0005] And because wear and tear is irreversible, the only way to repair and maintain it is to replace one of the parts, and the part to be replaced also needs to be matched according to the actual size of the retained part, which is not only time-consuming and labor-intensive, but also increases the cost of repair and maintenance;

[0006] In summary, the guide pins and guide sleeves in the prior art are subject to greater wear during use, have a shorter service life, and are more difficult to replace parts, resulting in higher maintenance costs. Utility Model Content

[0007] The purpose of the present invention is to provide a combined structure of a guide pin and a guide sleeve, which can effectively reduce the wear damage to the guide sleeve body and the guide pin body, and increase the service life of the guide sleeve body and the guide pin body. At the same time, during maintenance, only the bushing body with greater wear needs to be replaced, which makes replacement simpler and the replacement cost lower, effectively reducing the cost of maintenance.

[0008] The technical solutions adopted in this utility are as follows:

[0009] A guide column and guide sleeve combination structure comprises a guide sleeve body and a guide column body, wherein a bushing body is installed inside the guide sleeve body, the material hardness of the guide sleeve body and the guide column body is greater than the material hardness of the bushing body, and the guide column body is slidably connected inside the bushing body.

[0010] Furthermore, the guide sleeve body and the guide column body are both made of ductile iron, and the bushing body is made of copper.

[0011] Furthermore, an oil guide hole is provided on the bushing body, and an oil groove connected to the oil guide hole is provided on the inner wall of the bushing body.

[0012] Furthermore, the bushing body is installed inside the guide sleeve body by screws.

[0013] Furthermore, the upper end and the lower end of the bushing body are both fixedly connected with a positioning ring extending outward, and the end of the guide sleeve body is provided with an annular step groove, and the positioning ring is clamped inside the annular step groove.

[0014] Furthermore, the bushing body comprises an upper bushing and a lower bushing, the upper end of the upper bushing is fixedly connected to the positioning ring, and the lower end of the lower bushing is fixedly connected to the positioning ring.

[0015] The technical effects achieved by this utility model are:

[0016] (1) The utility model discloses a guide post and guide sleeve combination structure. By disposing a bushing body between the guide sleeve body and the guide post body, the bushing body bears the wear between the guide sleeve body and the guide post body, which can effectively reduce the wear damage to the guide sleeve body and the guide post body and improve the service life of the guide sleeve body and the guide post body.

[0017] (2) When a bushing body is severely worn, only the bushing body with greater wear needs to be replaced. Compared with replacing the guide sleeve body or the guide sleeve body, replacing the bushing body is simpler and has a lower replacement cost, which can effectively reduce the cost of repair and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cutaway structure of the utility model prior art;

[0019] Figure 2 It is a schematic diagram of the cutaway structure of the present utility model;

[0020] Figure 3 It is a structural schematic diagram of the practical bushing body;

[0021] Figure 4 This is a practical Figure 3 A partial enlarged view of point A in the middle.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Guide sleeve body; 2. Guide column body; 3. Bushing body; 4. Upper bushing; 5. Lower bushing; 6. Positioning ring; 7. Annular step groove; 8. Oil guide hole. DETAILED DESCRIPTION

[0024] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0025] like Figure 1-4 As shown, a combined structure of a guide pin and a guide sleeve includes a guide sleeve body 1 and a guide pin body 2, a bushing body 3 is installed inside the guide sleeve body 1, the material hardness of the guide sleeve body 1 and the guide pin body 2 is greater than the material hardness of the bushing body 3, and the guide pin body 2 is slidably connected inside the bushing body 3. At this time, by adding the bushing body 3, when the guide pin body 2 slides inside the bushing body 3, the sliding wear between the guide sleeve body 1 and the guide pin body 2 can be sufficiently reduced. When the bushing body 3 is severely worn, it is only necessary to replace the bushing body 3 with a larger amount of wear. Compared with replacing the guide sleeve body 1 or the guide sleeve body 1, replacing the bushing body 3 is simpler and the replacement cost is lower.

[0026] The guide sleeve body 1 and the guide column body 2 are both made of ductile iron, and the bushing body 3 is made of copper. Since the bushing body 3 is made of copper, there is a large material difference between the guide sleeve body 1 and the guide column body 2 made of ductile iron, which can effectively reduce the wear of the guide column body 2 during sliding.

[0027] At the same time, if Figure 3 As shown, in order to further reduce the wear of the guide pin body 2, the present technical solution chooses to perform precision boring on the bushing body 3, an oil guide hole 8 is opened on the bushing body 3, and an oil groove connected to the oil guide hole 8 is opened on the inner wall of the bushing body 3. The lubricating oil is injected into the oil groove through the oil guide hole 8, and is smeared between the guide pin body 2 and the bushing body 3 when the guide pin body 2 moves, thereby reducing the friction between the guide pin body 2 and the bushing body 3 and further reducing the wear.

[0028] like Figure 3-4 As shown, in order to facilitate the installation of the bushing body 3, the bushing body 3 is installed inside the guide sleeve body 1 by screws, and the upper and lower ends of the bushing body 3 are fixedly connected with a positioning ring 6 extending outward, and the end of the guide sleeve body 1 can be equipped with an annular step groove 7, and the positioning ring 6 can be clamped inside the annular step groove 7, or directly clamped at the end of the guide sleeve body 1. At this time, during the sliding process of the guide column body 2, the supporting force provided to the bushing body 3 by the positioning ring 6 can offset the kinetic energy transmitted to the bushing body 3 by the guide column body 2, reduce the shear force transmitted to the screw by the bushing body 3, and reduce the phenomenon of accidental breakage of the screw due to the large shear force.

[0029] like Figure 3 As shown, in order to facilitate the installation of the bushing body 3 provided with the annular step groove 7, the technical solution divides the bushing body 3 into an upper bushing 4 and a lower bushing 5. The upper bushing 4 and the lower bushing 5 can be spliced ​​into the bushing body 3 when they are overlapped and placed up and down. The upper end of the upper bushing 4 is fixedly connected to the positioning ring 6, and the lower end of the lower bushing 5 is fixedly connected to the positioning ring 6. At this time, the ends of the upper bushing 4 and the lower bushing 5 that are not connected to the positioning ring 6 can be directly installed into the interior of the guide sleeve body 1.

[0030] At the same time, in order to facilitate the installation of the bushing body 3, the bushing body 3 can be frozen to shrink its outer diameter, and then installed into the interior of the guide sleeve body 1 to reduce the difficulty of installation.

[0031] The working principle of the utility model is as follows: the upper bushing 4 and the lower bushing 5 are frozen to shrink their outer diameters, and then the upper bushing 4 and the lower bushing 5 are installed into the interior of the guide sleeve body 1 to assemble into the bushing body 3, and the bushing body 3 is fixed by screws to complete the assembly of the bushing body 3;

[0032] When the guide pillar 2 moves, it will slide inside the bushing 3. When the guide pillar 2 slides, the lubricating oil is injected into the oil groove through the oil guide hole 8. When the guide pillar 2 moves, the lubricating oil is applied between the guide pillar 2 and the bushing 3, thereby reducing the friction between the guide pillar 2 and the bushing 3 and further reducing the wear.

[0033] Since the bushing body 3 is made of copper, there is a large material difference between the guide sleeve body 1 and the guide pillar body 2 made of ductile iron, which can effectively reduce the wear of the guide pillar body 2 during sliding;

[0034] When the bushing body 3 is greatly worn, only the bushing body 3 with greater wear needs to be replaced.

[0035] In summary, the present technical solution sets a bushing body 3 between the guide sleeve body 1 and the guide column body 2, and the bushing body 3 bears the wear between the guide sleeve body 1 and the guide column body 2, so as to effectively reduce the wear damage suffered by the guide sleeve body 1 and the guide column body 2 and improve the service life of the guide sleeve body 1 and the guide column body 2. When the bushing body 3 is severely worn, it is only necessary to replace the bushing body 3 with greater wear. Compared with replacing the guide sleeve body 1 or the guide sleeve body 1, replacing the bushing body 3 is simpler and has a lower replacement cost, which can effectively reduce the cost of repair and maintenance. It can be seen that the present technical solution is not only simple in process, but also saves time and effort.

[0036] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A guide post and guide sleeve combination structure, comprising a guide sleeve body (1) and a guide post body (2), characterized in that: A bushing body (3) is installed inside the guide sleeve body (1); the material hardness of the guide sleeve body (1) and the guide column body (2) is greater than the material hardness of the bushing body (3); and the guide column body (2) is slidably connected inside the bushing body (3).

2. The guide post and guide sleeve combination structure according to claim 1, characterized in that: The guide sleeve body (1) and the guide column body (2) are both made of ductile iron, and the bushing body (3) is made of copper.

3. The guide post and guide sleeve combination structure according to claim 1, characterized in that: An oil guide hole (8) is provided on the bushing body (3), and an oil groove connected to the oil guide hole (8) is provided on the inner wall of the bushing body (3).

4. The guide post and guide sleeve combination structure according to claim 1, characterized in that: The bushing body (3) is mounted inside the guide sleeve body (1) by means of screws.

5. The guide post and guide sleeve combination structure according to claim 4, characterized in that: The upper and lower ends of the bushing body (3) are fixedly connected with a positioning ring (6) extending outward, and the end of the guide sleeve body (1) is provided with an annular step groove (7), and the positioning ring (6) is clamped inside the annular step groove (7).

6. A guide post and guide sleeve combination structure according to claim 5, characterized in that: The bushing body (3) comprises an upper bushing (4) and a lower bushing (5), the upper end of the upper bushing (4) being fixedly connected to a positioning ring (6), and the lower end of the lower bushing (5) being fixedly connected to the positioning ring (6).

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