Self-adaptive idle wheel

Abstract

The utility model provides a self-adaptive idle wheel which comprises an idle wheel shaft sleeve and bearings installed on the two end faces of the idle wheel shaft sleeve, the outer surface of the idle wheel shaft sleeve is covered with a friction layer, and the edges of the two end faces of the friction layer do not exceed the axial range of the idle wheel shaft sleeve in the axial direction. The friction layer is a rubber shaft sleeve. The idler shaft sleeve assembly further comprises a binding agent layer, the binding agent layer is located between the friction layer and the idler shaft sleeve, and the friction layer is bonded to the outer surface of the idler shaft sleeve through the binding agent layer. The midpoint of the axis of the rubber shaft sleeve coincides with the midpoint of the axis of the idler shaft sleeve. Bearing seat holes are formed in the two end faces of the idler shaft sleeve. And the bearing is matched with the bearing seat hole in a press-in manner. According to the self-adaptive idle wheel provided by the invention, the friction layer is additionally arranged on the idle wheel, so that the assembling and adjusting steps can be reduced, the service life of the dustproof belt is prolonged, and the maintenance-free effect in the life cycle of a normally used product is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of parts in the field of additive manufacturing equipment, and specifically relates to a self-adaptive idler wheel. Background Art

[0002] With the sharp increase in the development trend of laser powder bed fusion equipment, additive manufacturing has covered a variety of industries, such as mold manufacturing, medical, aerospace and other fields, which has also led to a substantial increase in equipment manufacturers. Various equipment parts have emerged on the market, and the design schemes are also diversified. The dustproof idler wheel described in this article is also a common component of most additive manufacturing equipment.

[0003] The idler wheel is mainly used in the molding room. It is connected to the dustproof belt, which is connected to the scraper transmission. The scraper repeatedly completes the reciprocating motion. The dustproof belt and the idler wheel are installed on the rear side of the sheet metal of the molding room to prevent large particles of smoke and powder generated during the printing process from entering the transmission system, thereby ensuring the life and operating status of the transmission system.

[0004] However, since the current method of use for laser powder bed melting is vertical installation, it is inconsistent with the installation method and use of traditional conveying equipment or automated equipment. This makes it easier for the dust belt to deviate vertically downward during operation. Even if flanges are added on both sides of the idler, there will be friction between the dust belt and the flange edge, which greatly shortens the life of the dust belt. To remove the idler and replace the dust belt, the sheet metal needs to be removed. The removal of sheet metal for most equipment in the industry is cumbersome, and because the sheet metal is a thin plate, the positioning and related accuracy cannot be controlled very accurately. The reinstallation of the sheet metal adds many steps and processes to maintenance. In addition, the operating requirements for the assemblers during the installation process are also relatively strict. The idlers need to be adjusted multiple times to achieve stable movement of the dust belt during operation. If it is a non-professional assembler, it will take a longer time to adjust the parallelism between the idlers, which is greatly unfavorable to the assembly of the equipment. Utility Model Content

[0005] The utility model provides an adaptive idler wheel, which can reduce assembly adjustment steps and increase the service life of the dustproof belt by adding a friction layer on the idler wheel, thereby achieving maintenance-free within the normal product life cycle, thereby solving the above-mentioned problems.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] The utility model provides a self-adaptive idler, comprising an idler sleeve and bearings mounted on both end surfaces of the idler sleeve, wherein the outer surface of the idler sleeve is covered with a friction layer, and the edges of the two end surfaces of the friction layer do not exceed the axial range of the idler sleeve in the axial direction.

[0008] In some embodiments, the friction layer is a rubber bushing.

[0009] In some embodiments, an adhesive layer is further included, wherein the adhesive layer is located between the friction layer and the idler shaft sleeve, and the friction layer is bonded to the outer surface of the idler shaft sleeve via the adhesive layer.

[0010] In some embodiments, the midpoint of the axis of the rubber bushing coincides with the midpoint of the axis of the idler bushing.

[0011] In some embodiments, bearing seat holes are provided on both end surfaces of the idler shaft sleeve.

[0012] In some embodiments, the bearing and the bearing seat hole are press-fitted.

[0013] In some embodiments, end covers are provided on both sides of the idler shaft sleeve.

[0014] In some embodiments, both end surfaces of the idler shaft sleeve are assembled with the end cover by countersunk screws.

[0015] In some embodiments, the outer ring of the bearing and the end cover are interference fit.

[0016] In some embodiments, the cross-sectional area of ​​the end cap is larger than the end surface area of ​​the idler bushing.

[0017] The beneficial effects of this application are:

[0018] The adaptive idler wheel provided by the present application has the following beneficial effects: 1. There is no need to purchase anti-drifting dustproof belts and anti-drifting idler wheels, which reduces costs; 2. The rubber bushing has the effect of increasing friction, which can reduce the deviation effect of the dustproof belt; 3. The contact area is reduced to ensure that the flat belt is in contact with the idler wheel only in the necessary minimum area; 4. Based on the above points, a maintenance-free effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the idler wheel of this application;

[0020] Figure 2 This is a front view of the idler pulley for this application.

[0021] Description of reference numerals:

[0022] Idler shaft sleeve-1; bearing-2; friction layer-3; end cover-4; countersunk screw-5. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The specific embodiments described herein are merely used to explain the present application, rather than to limit the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0025] It should be noted that, in this document, relational terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0026] Figure 1 This is a schematic diagram of the structure of the idler wheel in this application. Figure 2 This is the front view of the idler pulley for this application.

[0027] Combination Figure 1 as well as Figure 2 An adaptive idler comprises an idler sleeve 1 and bearings 2 mounted on both end surfaces of the idler sleeve 1, wherein the outer surface of the idler sleeve 1 is covered with a friction layer 3, and the edges of both end surfaces of the friction layer 3 do not exceed the axial range of the idler sleeve 1 in the axial direction.

[0028] Specifically, the adaptive idler of the present solution has an idler sleeve 1 as its main body, and bearing seat holes are provided on both end surfaces of the idler sleeve 1, and press-fit bearings 2 are installed in the bearing seat holes. On this basis, in order to increase the friction between the dustproof belt and the idler sleeve 1, a friction layer 3 is sleeved on the outer surface of the idler sleeve 1. At the same time, in order to reduce the contact area between the dustproof belt and the friction layer 3, so as to firmly lock the dustproof belt within the corresponding range, the edges of the two end surfaces of the friction layer 3 should not exceed the axial range of the idler sleeve 1 in the axial direction, that is, both end surfaces of the friction layer 3 do not exceed the edges of the two end surfaces of the idler sleeve 1.

[0029] In some embodiments, the friction layer 3 is a rubber bushing.

[0030] In some embodiments, an adhesive layer is further included, wherein the adhesive layer is located between the friction layer 3 and the idler shaft sleeve 1 , and the friction layer 3 is bonded to the outer surface of the idler shaft sleeve 1 via the adhesive layer.

[0031] In some embodiments, the midpoint of the axis of the rubber bushing coincides with the midpoint of the axis of the idler bushing 1 .

[0032] Specifically, the friction layer 3 can be made of a material with a high friction coefficient. In this solution, a rubber sleeve is selected as the friction layer 3. An adhesive is applied to the inner ring of the rubber sleeve, and the rubber sleeve can be bonded to the outer surface of the idler sleeve 1. At the same time, in order to further improve the stability of the dustproof belt on the rubber sleeve during the offset stroke, the midpoint of the axis of the rubber sleeve should be coincident with the midpoint of the axis of the idler sleeve 1 during bonding, that is, the rubber sleeve needs to be bonded to the center of the axis of the idler sleeve 1.

[0033] In some embodiments, bearing seat holes are provided on both end surfaces of the idler shaft sleeve 1 .

[0034] In some embodiments, the bearing 2 and the bearing seat hole are press-fitted.

[0035] Specifically, the adaptive idler of the present solution has an idler sleeve 1 as its main body. Both end surfaces of the idler sleeve 1 are provided with bearing seat holes, and press-fit bearings 2 are installed in the bearing seat holes.

[0036] In some embodiments, end covers 4 are provided on both sides of the idler shaft sleeve 1 .

[0037] In some embodiments, both end surfaces of the idler shaft sleeve 1 are assembled with the end cover 4 by countersunk screws 5 .

[0038] In some embodiments, the outer ring of the bearing 2 and the end cover 4 are interference fit.

[0039] In some embodiments, the cross-sectional area of ​​the end cover 4 is larger than the cross-sectional area of ​​the idler shaft sleeve 1 .

[0040] Specifically, although the rubber sleeve in the above solution can limit the dust belt to operate within the contact surface with it, in order to ensure the safe operation of the additive manufacturing equipment and prevent the dust belt from accidentally falling off the rubber sleeve, this solution still needs to set end covers 4 on both sides of the idler sleeve 1, and the two end surfaces of the idler sleeve 1 are assembled with the end covers 4 through countersunk screws 5, and the countersunk screws 5 can be hexagonal countersunk screws. In addition, the end cover 4 also serves as a bearing pressure cover, and has an interference fit with the outer ring of the bearing 2 to ensure the fixing effect of the bearing 2.

[0041] The working principle of this scheme is:

[0042] A customized rubber sleeve is installed on the idler sleeve 1. The customized rubber sleeve is installed by adhesive and thread-free. The first purpose is to increase the distance from the rotation center and reduce centrifugal force. The assembled idler wheel is installed in the molding chamber of the equipment to form a closed loop connection with the dustproof belt. Since the maximum transmission speed can reach 200mm / s, which is relatively fast, the contact area between the dustproof belt and the rubber sleeve can be reduced, so that the deviation direction of the dustproof belt can be changed by the upward force and downward force brought about by the reciprocating motion. Even if the dustproof belt deviates, it only runs on the contact surface with the rubber sleeve. During operation, it will deviate downward when running forward and upward when running backward. At the same time, since the friction coefficient of the rubber sleeve surface is relatively large, the dustproof belt can be firmly locked within the corresponding range to reduce the deviation effect, so that the dustproof belt can perform adaptive reciprocating operation on the contact surface with the rubber sleeve. When the dustproof belt runs forward, it will move downward along the axial direction of the rubber sleeve at the same time, and when it runs backward, it will move upward along the axial direction of the rubber sleeve at the same time, so as to always stay within the corresponding range and not touch the end covers 4 on both sides, so as to control it to run in the necessary area.

[0043] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present application and to form different embodiments.

[0044] Those skilled in the art will appreciate that the description of each embodiment has its own emphasis, and for parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the attached claims. The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present utility model, and these modifications or replacements should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be based on the protection scope of the claims.

[0046] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An adaptive idler, comprising an idler sleeve and bearings mounted on both end surfaces of the idler sleeve, characterized in that: The outer surface of the idler shaft sleeve is covered with a friction layer, and the edges of both end surfaces of the friction layer do not exceed the axial range of the idler shaft sleeve in the axial direction.

2. The adaptive idler wheel according to claim 1, characterized in that: The friction layer is a rubber bushing.

3. The adaptive idler wheel according to claim 2, characterized in that: The invention also includes an adhesive layer, wherein the adhesive layer is located between the friction layer and the idler shaft sleeve, and the friction layer is bonded to the outer surface of the idler shaft sleeve via the adhesive layer.

4. The adaptive idler wheel according to claim 3, characterized in that: The midpoint of the axis of the rubber bushing coincides with the midpoint of the axis of the idler bushing.

5. The adaptive idler wheel according to claim 1, characterized in that: Both end surfaces of the idler shaft sleeve are provided with bearing seat holes.

6. The adaptive idler wheel according to claim 5, characterized in that: The bearing and the bearing seat hole are press-fitted.

7. The adaptive idler according to any one of claims 1 to 6, characterized in that: End covers are provided on both sides of the idler shaft sleeve.

8. The adaptive idler wheel according to claim 7, characterized in that: Both end surfaces of the idler shaft sleeve are assembled with the end cover through countersunk screws.

9. The adaptive idler wheel according to claim 8, characterized in that: The outer ring of the bearing is interference fit with the end cover.

10. The adaptive idler wheel according to claim 9, characterized in that: The cross-sectional area of ​​the end cover is larger than the end surface area of ​​the idler shaft sleeve.

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