Guide assembly and column lifting guide mechanism

Abstract

The present invention discloses a guide assembly and a column lifting guide mechanism, comprising: a guide rail seat; a pin shaft, one end of which is connected to the guide rail seat; a lateral sliding pad, which is connected to the other end of the pin shaft, and the surface of the lateral sliding pad opposite to the pin shaft constitutes a sliding mating surface; a rubber-coated bearing, the rubber-coated bearing jacket is connected to the pin shaft, the rubber-coated bearing is located between the guide rail seat and the lateral sliding pad, and the outer ring is spaced apart from the guide rail seat and the lateral sliding pad. The guide assembly according to the embodiment of the present invention can reduce the assembly cost and increase the service life of the guide assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a guide component and a column lifting guide mechanism. Background Art

[0002] The general cone beam computer reconstruction tomography equipment (CBCT for short) can perform CT, panoramic and lateral three-in-one oral measurements. In the three-in-one oral CBCT, the multi-sliding column with the main rotating arm and the lateral arm slides up and down to adjust the height to adapt to the height of different patients. Here, the cantilever of the main rotating arm and the lateral arm is long and heavy, and the sliding column is subjected to the forward and lateral moments in the corresponding directions, among which the forward moment is the largest.

[0003] Generally, guide components are linear guides or sliders. Among them, linear guides are mostly used in industry, are more expensive, and require very high installation and positioning accuracy. The slider solution has a lower cost, but the assembly needs to be adjusted, and the sliding friction is large. The slider will also wear and deform after long-term use. Therefore, if this solution is used in CBCT, it will also cause the sliding column to tilt forward or sideways, and the service life is relatively short. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a guide assembly to reduce assembly costs and increase the service life of the guide assembly.

[0005] The present invention also aims to provide a column lifting guide mechanism of a cone beam projection computer reconstruction tomography imaging device having the above-mentioned guide assembly.

[0006] According to an embodiment of the present invention, the guide assembly includes: a guide rail seat; a pin shaft, one end of which is connected to the guide rail seat; a lateral sliding pad, which is connected to the other end of the pin shaft, and the surface of the lateral sliding pad opposite to the pin shaft constitutes a sliding fitting surface; a rubber-coated bearing, the rubber-coated bearing jacket is connected to the pin shaft, the rubber-coated bearing is located between the guide rail seat and the lateral sliding pad, and the outer ring is spaced apart from the guide rail seat and the lateral sliding pad.

[0007] According to the guide assembly of the embodiment of the present invention, by connecting the rubber-coated bearing jacket to the pin shaft, rolling guidance along the tangential direction of the rubber-coated bearing and sliding guidance along the axial direction of the rubber-coated bearing can be achieved. The rolling friction and friction coefficient of the plastic-coated bearing are small, which is conducive to improving the flexibility of the rolling guide and the service life of the guide assembly, and can also improve the bearing capacity of the guide assembly. For example, when the guide assembly is suitable for CBCT, it can withstand a large front and rear overturning moment. The wear resistance can be increased by setting the lateral sliding pad, while the friction coefficient can be reduced to increase the service life, the flexibility of the sliding guide can be improved, and the bearing capacity can also be improved. For example, when the guide assembly is suitable for CBCT, it can withstand a large left and right overturning moment. In addition, the integrated simple structural characteristics of the guide assembly make its installation space compact, the precision requirements low, the allowable error large, and the flexibility stronger.

[0008] In some embodiments, a convex ring is provided on the outer periphery of the pin shaft adjacent to one end of the lateral sliding pad, and the inner ring of the rubber-coated bearing abuts against the convex ring.

[0009] In some embodiments, a groove ring is provided on the outer periphery of the pin shaft, and the guide assembly further includes a clamping ring fitted in the groove ring, and the clamping ring is clamped on a side of the inner ring of the rubber-encapsulated bearing adjacent to the guide rail seat.

[0010] In some embodiments, a sink is provided on the end surface of the pin shaft, and a boss that is inserted into the sink is provided on the lateral sliding pad.

[0011] In some embodiments, a countersunk hole is provided on the lateral sliding pad, and the lateral sliding pad is connected to the pin shaft by a countersunk screw passing through the countersunk hole.

[0012] In some embodiments, the guide assembly further includes an axial limit ring disposed on the pin shaft and clamped on the end surface of the inner ring of the rubber-encapsulated bearing and the end surface of the guide rail seat.

[0013] In some embodiments, the guide rail seat is in the shape of an elongated strip, and a plurality of spaced-apart pins are provided on the guide rail seat along the length direction.

[0014] According to the embodiment of the present invention, the column lifting guide mechanism of the cone-beam projection computer reconstruction tomography imaging equipment includes: a fixed column, a vertically arranged lifting cavity is provided in the fixed column; a guide assembly, the guide assembly is at least two groups, wherein the two groups of guide assemblies are respectively arranged on opposite sides of the lifting cavity, the guide assembly is the guide assembly described in the above embodiment of the present invention, and the guide assembly is connected to the fixed column through a guide rail seat; a sliding column, the sliding column is located in the lifting cavity, the sliding column has at least two sides provided with sliding grooves extending vertically, and the sliding grooves on both sides are respectively matched with the guide assemblies on both sides; wherein each of the sliding grooves has a bottom surface and a side surface, the bottom surface of the sliding groove is in contact with the sliding matching surface of the lateral sliding pad, and at least one side surface of the sliding groove is in contact with the outer ring of the rubber-coated bearing.

[0015] According to the column lifting guide mechanism of the cone beam projection computer reconstruction tomography imaging device of the embodiment of the present invention, at least one side of the sliding groove contacts and cooperates with the outer ring of the rubber-coated bearing, so that rolling can occur between the rubber-coated bearing and the side of the sliding column, and can withstand a large forward or backward tilting moment. In this way, the forward or backward tilting moment of the corresponding direction on the sliding column can be reduced, and the lifting stability and service life of the sliding column can be improved. Through the bottom surface of the sliding groove and the sliding matching surface of the lateral sliding pad, sliding can occur between the lateral sliding pad and the guide surface of the sliding column, and the lateral sliding pad can withstand a large left and right overturning moment, thereby reducing the left and right moment on the sliding column, thereby further improving the lifting stability and service life of the sliding column. In addition, the friction coefficient of the rubber-coated bearing and the lateral sliding pad is small, the flexibility is high, and the integrated and simple structural characteristics of the guide component also make its installation space compact, the precision requirement is low, the allowable error is large, and the flexibility is stronger. This facilitates the assembly of the column lifting guide mechanism, so that the sliding column can be stably lifted and lowered relative to the fixed column, and the friction loss is small, which is conducive to improving the service life of the column lifting guide mechanism.

[0016] In some embodiments, opposite side surfaces of the sliding groove are in contact with the outer ring of the rubber-encapsulated bearing.

[0017] In some embodiments, the pin of the guide assembly is fixedly connected to the fixed column by a screw.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 A three-dimensional diagram of a guide assembly in one embodiment of the present invention;

[0021] Figure 2 A bottom view of a guide assembly in one embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of a guide assembly in one embodiment of the present invention;

[0023] Figure 4 is a cross-sectional view of a guide assembly in another embodiment of the present invention;

[0024] Figure 5 It is a front view of the pin in the embodiment of the present invention;

[0025] Figure 6 A cross-sectional view of a guide assembly in another embodiment of the present invention;

[0026] Figure 7 It is a top view of the column lifting and guiding mechanism of the cone-beam projection computer reconstruction tomography imaging device in the embodiment of the present invention.

[0027] Reference numerals:

[0028] Column lifting and guiding mechanism 1000 for cone beam projection computer reconstruction tomography imaging equipment,

[0029] Guide assembly 100,

[0030] Guide rail seat 1,

[0031] Pin 2, convex ring 21, groove ring 22, sink 23,

[0032] Lateral sliding pad 3,

[0033] Rubber coated bearings 4.

[0034] Axial limit ring 5,

[0035] Fixed column 200, lifting chamber 201,

[0036] Sliding column 300 and sliding groove 301 . DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", "axial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Reference below Figure 1-Figure 6 A guide assembly 100 according to an embodiment of the present invention is described.

[0041] According to the guide assembly 100 of the embodiment of the present invention, Figure 1-Figure 4 As shown, it includes: a guide rail seat 1, a pin shaft 2, a lateral sliding pad 3 and a rubber-coated bearing 4. One end of the pin shaft 2 is connected to the guide rail seat 1. The lateral sliding pad 3 is connected to the other end of the pin shaft 2, and the surface of the lateral sliding pad 3 opposite to the pin shaft 2 constitutes a sliding mating surface. The outer sleeve of the rubber-coated bearing 4 is connected to the pin shaft 2, and the rubber-coated bearing 4 is located between the guide rail seat 1 and the lateral sliding pad 3. The outer ring of the rubber-coated bearing 4 is coated with a plastic layer, and the outer ring is spaced apart from the guide rail seat 1 and the lateral sliding pad 3.

[0042] It can be understood that the outer sleeve of the rubber-coated bearing 4 is connected to the pin 2 and can rotate around the pin 2, so that rolling guidance along the tangential direction of the rubber-coated bearing 4 can be achieved, and sliding guidance along the axial direction of the rubber-coated bearing 4 can be achieved. That is, it can become an integrated rolling and sliding composite guide component 100 with high guiding stability.

[0043] Specifically, the guide rail seat 1 provides an installation position for the pin shaft 2, which improves the installation stability of the pin shaft 2, thereby improving the stability of the guide assembly 100 for rolling and sliding guidance, and is easy to assemble. The setting of the rubber-coated bearing 4 can improve the flexibility of the sliding guide, reduce the rolling friction of the plastic-coated bearing, and increase the service life of the guide assembly 100. The rubber-coated bearing 4 can also improve the load-bearing capacity of the guide assembly 100, such as Figure 7 As shown, when the guide assembly 100 is suitable for CBCT, it can withstand a large forward and backward overturning moment. The provision of the lateral sliding pad 3 can increase the wear resistance of the sliding guide, while reducing the friction coefficient to increase the service life and improve the flexibility of the sliding guide. The lateral sliding pad 3 can also improve the load-bearing capacity, such as Figure 7 As shown, when the guide assembly 100 is suitable for CBCT, it can withstand a large left-right overturning moment.

[0044] Therefore, in the CBCT, the structures that bear the front-back overturning moment and the left-right moment are concentrated on the guide assembly 100, which can improve the service life and operation stability of the CBCT. Of course, when the guide assembly 100 is suitable for other equipment, it can also have the above-mentioned function, which is not specifically limited here.

[0045] In addition, the guide assembly 100 of the present invention has a simple structure, low overall assembly precision requirements, a large error tolerance, and low resistance, and can achieve long-life guide requirements with a low-cost, simple integrated solution.

[0046] According to the guide assembly 100 of the embodiment of the present invention, by connecting the outer sleeve of the rubber-coated bearing 4 to the pin 2, rolling guidance along the tangential direction of the rubber-coated bearing 4 and sliding guidance along the axial direction of the rubber-coated bearing 4 can be achieved. In addition, the rolling friction and friction coefficient of the plastic-coated bearing are small, which is conducive to improving the flexibility of the rolling guidance and the service life of the guide assembly, and can also improve the bearing capacity of the guide assembly 100. For example, when the guide assembly 100 is suitable for CBCT, it can withstand a large front and rear overturning moment. The wear resistance can be increased by setting the lateral sliding pad 3, while the friction coefficient can be reduced to increase the service life, the flexibility of the sliding guide can be improved, and the bearing capacity can also be improved. For example, when the guide assembly 100 is suitable for CBCT, it can withstand a large left and right overturning moment. In addition, the integrated simple structural features of the guide assembly 100 make its installation space compact, the precision requirements low, the allowable error large, and the flexibility stronger.

[0047] Optionally, the lateral sliding pad 3 can be made of ultra-high molecular weight polyethylene or POM material, which has high wear resistance and low friction coefficient. The lateral sliding pad 3 can also be a modified material of nylon, etc., which also has the above advantages, and specific restrictions are made here.

[0048] Optionally, the outer ring of the rubber-coated bearing 4 is coated with a plastic layer, and the plastic layer can be an engineering plastic coated by injection molding of the outer ring of a common ball bearing, such as POM or nylon. This can improve the flexibility of the sliding guide, reduce the rolling friction of the plastic-coated bearing, and increase the service life of the guide assembly 100. Of course, other injection-molded engineering plastics can also be used, and there is no specific limitation here.

[0049] In some embodiments, Figure 4-Figure 5As shown, a convex ring 21 is provided on the outer periphery of the end of the pin shaft 2 adjacent to the lateral sliding pad 3, and the inner ring of the rubber-coated bearing 4 stops against the convex ring 21. In this way, the convex ring 21 can limit and fix the inner ring of the rubber-coated bearing 4, thereby improving the installation stability of the inner ring of the rubber-coated bearing 4.

[0050] In some embodiments, Figure 4-Figure 5 As shown, a groove ring 22 is provided on the outer periphery of the pin shaft 2, and the guide assembly 100 further includes a clamping ring fitted in the groove ring 22, and the clamping ring is clamped on the side of the inner ring of the rubber-coated bearing 4 adjacent to the guide rail seat 1. In this way, the clamping ring can be stably fitted in the groove ring 22, and play a role in limiting and fixing the inner ring of the rubber-coated bearing 4, thereby improving the installation stability of the inner ring of the rubber-coated bearing 4.

[0051] In some embodiments, Figure 4 and Figure 5 As shown, a sink 23 is provided on the end surface of the pin shaft 2, and a boss is provided on the lateral sliding pad 3 to be inserted into the sink 23. In this way, the boss can be stably fitted in the sink 23, thereby improving the installation stability of the lateral sliding pad 3.

[0052] In some embodiments, Figure 4 As shown, a countersunk hole is provided on the lateral sliding pad 3, and the lateral sliding pad 3 is connected to the pin 2 through a countersunk screw passing through the countersunk hole. In this way, the reliability of the lateral sliding pad 3 being fixed on the pin 2 can be improved through the connection effect of the countersunk screw.

[0053] In some embodiments, Figure 6 As shown, the guide assembly 100 also includes an axial stop ring 5 which is arranged on the pin 2 and clamped on the end face of the inner ring of the rubber-coated bearing 4 and the end face of the guide rail seat 1. In this way, the axial stop ring 5 can limit and fix the inner ring of the rubber-coated bearing 4, thereby improving the installation stability of the rubber-coated bearing 4.

[0054] In some embodiments, the rubber-coated bearing 4 is a deep groove ball bearing. It is understandable that the deep groove ball bearing has a simple structure and is easy to use. It can withstand a large radial load, which is conducive to improving the load-bearing capacity of the rubber-coated bearing 4.

[0055] In some embodiments, the guide rail seat 1 is in the shape of an elongated strip, and a plurality of spaced pins 2 are provided along the length direction of the guide rail seat 1. This facilitates the molding of the guide rail seat 1 and helps to make the guide rail seat 1 load-bearing evenly, thereby reducing the torque borne by a single pin 2 and improving the guiding stability and service life of the guide assembly 100.

[0056] Optionally, the guide rail seat 1 may also be provided with a plurality of pins 2 in a concentrated manner along the length direction, so that the guide assembly 100 can be reduced in size and be more flexible.

[0057] Reference below Figure 1-Figure 5 A guide assembly 100 in accordance with one specific embodiment of the present invention is described.

[0058] The guide assembly 100 according to the embodiment of the present invention comprises: a guide rail seat 1, a pin shaft 2, a lateral sliding pad 3, a rubber-coated bearing 4 and a retaining ring.

[0059] The guide rail seat 1 is in the shape of an elongated strip and is provided with a plurality of spaced-apart pins 2 along the length direction.

[0060] A countersunk hole is provided on the lateral sliding pad 3, and the lateral sliding pad 3 is connected to the pin shaft 2 by means of a countersunk screw passing through the countersunk hole. The surface of the lateral sliding pad 3 opposite to the pin shaft 2 constitutes a sliding fitting surface.

[0061] The rubber-coated bearing 4 is a deep groove ball bearing. The outer sleeve of the rubber-coated bearing 4 is connected to the pin shaft 2. The rubber-coated bearing 4 is located between the guide rail seat 1 and the lateral sliding pad 3. The outer ring of the rubber-coated bearing 4 is coated with a plastic layer, and the outer ring is spaced apart from the guide rail seat 1 and the lateral sliding pad 3.

[0062] A convex ring 21 is provided on the outer periphery of one end of the pin shaft 2 near the lateral sliding pad 3, and the inner ring of the rubber-coated bearing 4 abuts against the convex ring 21. A groove ring 22 is provided on the outer periphery of the pin shaft 2, and the clamping ring is clamped on the side of the inner ring of the rubber-coated bearing 4 near the guide rail seat 1. A sink 23 is provided on the end surface of the pin shaft 2, and a boss that is clamped into the sink 23 is provided on the lateral sliding pad 3.

[0063] The following describes a column lifting and guiding mechanism 1000 of a cone-beam projection computerized reconstruction tomography imaging device according to an embodiment of the present invention with reference to the accompanying drawings.

[0064] The column lifting and guiding mechanism 1000 of the cone beam projection computer reconstruction tomography imaging device according to the embodiment of the present invention is as follows: Figure 7 As shown, it includes: a fixed column 200, a guide assembly 100 and a sliding column 300. A vertically arranged lifting chamber 201 is provided in the fixed column 200. There are at least two groups of guide assemblies 100, wherein the two groups of guide assemblies 100 are respectively arranged on opposite sides of the lifting chamber 201, and the guide assemblies 100 are the guide assemblies 100 of the above-mentioned embodiment of the present invention, and the guide assemblies 100 are connected to the fixed column 200 through the guide rail seat 1. The sliding column 300 is located in the lifting chamber 201, and at least two sides of the sliding column 300 are provided with sliding grooves 301 extending vertically, and the sliding grooves 301 on both sides are respectively matched with the guide assemblies 100 on both sides. Among them, each sliding groove 301 has a bottom surface and a side surface, and the bottom surface of the sliding groove 301 contacts and matches with the sliding matching surface of the lateral sliding pad 3, and at least one side surface of the sliding groove 301 contacts and matches with the outer ring of the rubber-encapsulated bearing 4.

[0065] It is understandable that at least one side of the sliding groove 301 is in contact with the outer ring of the rubber-coated bearing 4, so that rolling can occur between the rubber-coated bearing 4 and the side of the sliding column 300, and a large overturning moment can be borne. Specifically, if the front side of the sliding groove 301 is in contact with the outer ring of the rubber-coated bearing 4, the rubber-coated bearing 4 can withstand a large front overturning moment. If the rear side of the sliding groove 301 is in contact with the outer ring of the rubber-coated bearing 4, the rubber-coated bearing 4 can withstand a large rear overturning moment. If both the front and rear sides of the sliding groove 301 are in contact with the outer ring of the rubber-coated bearing 4, the rubber-coated bearing 4 can withstand a large front and rear overturning moment. In this way, the structure that bears the front and rear overturning moments is concentrated on the guide assembly 100, which can improve the lifting stability of the sliding column 300, reduce the moment of the corresponding direction of forward tilt and side tilt of the sliding column 300, and improve the service life of the sliding column 300.

[0066] The bottom surface of the sliding groove 301 contacts and cooperates with the sliding matching surface of the lateral sliding pad 3, so that sliding can occur between the lateral sliding pad 3 and the guide surface of the sliding column 300, and the lateral sliding pad 3 can withstand a large left and right overturning moment, thereby reducing the left and right moment exerted on the sliding column 300, thereby further improving the lifting stability and service life of the sliding column 300.

[0067] In addition, the friction coefficient of the rubber-coated bearing 4 and the lateral sliding pad 3 is small, and the flexibility is high. The integrated and simple structural characteristics of the guide assembly 100 also make its installation space compact, the precision requirement is low, the allowable error is large, and the flexibility is stronger. This facilitates the assembly of the column lifting guide mechanism 1000 of the cone beam projection computer reconstruction tomography imaging device, so that the sliding column 300 can be stably lifted and lowered relative to the fixed column 200, and the friction loss is small, which is conducive to improving the service life of the column lifting guide mechanism 1000.

[0068] According to the column lifting guide mechanism 1000 of the cone beam projection computer reconstruction tomography imaging device of the embodiment of the present invention, at least one side of the sliding groove 301 contacts and cooperates with the outer ring of the rubber-coated bearing 4, so that the rubber-coated bearing 4 and the side of the sliding column 300 can roll, and can withstand a large forward tilting or backward tilting moment. In this way, the forward tilting or backward tilting moment of the corresponding direction of the sliding column 300 can be reduced, and the lifting stability and service life of the sliding column 300 can be improved. Through the bottom surface of the sliding groove 301 and the sliding matching surface of the lateral sliding pad 3, the lateral sliding pad 3 can slide with the guide surface of the sliding column 300, and the lateral sliding pad 3 can withstand a large left and right overturning moment, thereby reducing the left and right moment of the sliding column 300, thereby further improving the lifting stability and service life of the sliding column 300. In addition, the friction coefficient of the rubber-coated bearing 4 and the lateral sliding pad 3 is small, the flexibility is high, and the integrated and simple structural characteristics of the guide component 100 also make its installation space compact, the precision requirement is low, the allowable error is large, and the flexibility is stronger. This facilitates the assembly of the column lifting guide mechanism 1000 , so that the sliding column 300 can be stably lifted and lowered relative to the fixed column 200 , and the friction loss is small, which is beneficial to improving the service life of the column lifting guide mechanism 1000 .

[0069] In some embodiments, Figure 7 As shown, the opposite sides of the sliding groove 301 are in contact with the outer ring of the rubber-coated bearing 4. In this way, the rubber-coated bearing 4 can withstand a large forward and backward overturning moment. The structure that bears the forward and backward overturning moment is concentrated on the guide assembly 100, which can improve the lifting stability of the sliding column 300, reduce the forward and backward tilting moments of the sliding column 300 in the corresponding directions, and increase the service life of the sliding column 300.

[0070] In some embodiments, the pin 2 of the guide assembly 100 is fixedly connected to the fixed column 200 by screws. In this way, the reliability of the pin 2 being installed on the fixed column 200 can be improved through the connection effect of the screws.

[0071] Optionally, the sliding column 300 and the fixed column 200 can be aluminum alloy parts, and the rubber-coated bearing 4 and its mating surface are specific engineering plastics. This can not only reduce weight, but also reduce noise and have a low friction coefficient, that is, the strength can ensure the requirement of no deformation and will not wear the aluminum alloy substrate.

[0072] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] Although the 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 claims and their equivalents.

Claims

1. A guide assembly, characterized in that: include: Guide rail seat; A pin shaft, one end of which is connected to the guide rail seat; A lateral sliding pad, the lateral sliding pad is connected to the other end of the pin shaft, and the surface of the lateral sliding pad opposite to the pin shaft constitutes a sliding mating surface; A rubber-coated bearing, wherein the outer sleeve of the rubber-coated bearing is connected to the pin shaft, the rubber-coated bearing is located between the guide rail seat and the lateral sliding pad, and the outer ring of the rubber-coated bearing is spaced apart from the guide rail seat and the lateral sliding pad; A convex ring is provided on the outer periphery of one end of the pin shaft adjacent to the lateral sliding pad, and the inner ring of the rubber-coated bearing abuts against the convex ring.

2. The guide assembly according to claim 1, characterized in that: A groove ring is provided on the outer periphery of the pin shaft, and the guide assembly further comprises a clamping ring fitted in the groove ring, and the clamping ring is clamped on a side of the inner ring of the rubber-coated bearing adjacent to the guide rail seat.

3. The guide assembly according to claim 1, characterized in that: A sinking platform is arranged on the end surface of the pin shaft, and a boss which is inserted into the sinking platform is arranged on the lateral sliding pad.

4. The guide assembly according to claim 1, characterized in that: The lateral sliding pad is provided with a countersunk hole, and the lateral sliding pad is connected to the pin shaft through a countersunk screw passing through the countersunk hole.

5. The guide assembly according to claim 1, characterized in that: It also includes an axial limiting ring which is arranged on the pin shaft and clamped on the end surface of the inner ring of the rubber-encapsulated bearing and the end surface of the guide rail seat.

6. The guide assembly according to any one of claims 1 to 5, characterized in that: The guide rail seat is in the shape of an elongated strip, and is provided with a plurality of spaced-apart pins along the length direction.

7. A column lifting and guiding mechanism for cone beam projection computer reconstruction tomography equipment, characterized in that: include: A fixed column, wherein a vertically arranged lifting cavity is provided in the fixed column; A guide assembly, wherein the guide assembly comprises at least two groups, wherein the two groups of the guide assemblies are respectively arranged on opposite sides of the lifting chamber, the guide assembly is the guide assembly according to any one of claims 1 to 6, and the guide assembly is connected to the fixed column through a guide rail seat; A sliding column, wherein the sliding column is located in the lifting chamber, and the sliding column has at least two sides provided with sliding grooves extending vertically, and the sliding grooves on both sides respectively cooperate with the guide components on both sides; wherein each of the sliding grooves has a bottom surface and a side surface, the bottom surface of the sliding groove contacts and cooperates with the sliding matching surface of the lateral sliding pad, and at least one side surface of the sliding groove contacts and cooperates with the outer ring of the rubber-coated bearing.

8. The column lifting and guiding mechanism of the cone-beam projection computer reconstruction tomography imaging device according to claim 7, characterized in that: The opposite side surfaces of the sliding groove are in contact with and matched with the outer ring of the rubber-encapsulated bearing.

9. The column lifting and guiding mechanism of the cone-beam projection computer reconstruction tomography imaging device according to claim 7, characterized in that: The pin shaft of the guide assembly is fixedly connected to the fixed column by screws.

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