Linear bearing

Abstract

The utility model belongs to the technical field of transmission parts, and particularly relates to a linear bearing which comprises a bearing main body, a retainer is arranged in the bearing main body, and a plurality of steel balls are arranged in the retainer; the gaskets are arranged at the two ends of the retainer; the heat dissipation surface layer is arranged on the surface of the outer side of the bearing main body, and the heat dissipation surface layer is composed of groove bodies formed in the two sides of the bearing main body; the oil injection part is arranged on the surface of the bearing main body and is used for adding lubricating oil into the retainer; wherein the groove body and the bearing main body are integrally formed, and compared with the prior art, the precision of the linear bearing is ensured, and the service life of the linear bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transmission part technical field especially, it relates to a linear bearing. BACKGROUND

[0002] Linear bearing is a kind of mechanical component for supporting and guiding load movement along straight line direction. It improves the motion accuracy and efficiency of machine equipment by reducing friction. Linear bearing is commonly used in various automated equipment, machine tools, 3D printers and other mechanical systems, especially in occasions requiring accurate positioning and high-speed movement, such as the patent disclosed in application No. CN202421380949.4, a kind of new linear bearing, including outer ring, retainer and ball, the retainer is installed in the inner part of outer ring, the inner part of outer ring is provided with first sealing ring, the inner part of outer ring is provided with first clamping groove, the side of first sealing ring is clamped into the inner part of first clamping groove, the inner part of outer ring is provided with second sealing ring, the inner part of outer ring is provided with second clamping groove, the side of second sealing ring is clamped into the inner part of second clamping groove, the retainer is fixed between first sealing ring and second sealing ring, the side surface of retainer is provided with circulating groove, the ball is installed in the inner part of circulating groove, the side of outer ring is provided with step, the diameter size of step is slightly smaller than the diameter size of outer ring, the step part is inserted into the mounting hole or mounting slot of box slide or equipment, and then the whole part of outer ring enters;

[0003] This kind of existing linear bearing is prone to heat phenomenon in use, which causes the linear bearing to produce matching error due to thermal expansion and contraction, reduces the precision of linear bearing, also causes the linear bearing to appear damage phenomenon, reduces the service life of linear bearing, at the same time, the lubrication in the linear bearing is difficult, reduces the maintenance effect and working efficiency of linear bearing, so it is necessary to improve. CONTENT OF UTILITY MODEL

[0004] The utility model aims at the above-mentioned technical problem, provides a kind of linear bearing to improve the progress and service life of linear bearing and facilitate the maintenance of linear bearing.

[0005] Therefore, the utility model provides a kind of linear bearing, comprising:

[0006] Bearing main body, the bearing main body is provided with retainer, the retainer is provided with several steel balls;

[0007] Gasket, the gasket is arranged at the both ends of retainer;

[0008] Further comprising:

[0009] Heat dissipation surface layer, the heat dissipation surface layer is arranged on the outer side surface of bearing main body, the heat dissipation surface layer is formed by the groove body arranged on the both sides of bearing main body;

[0010] The oiling section is located on the surface of the bearing body and is used to add lubricating oil to the inside of the retainer;

[0011] The groove is integrally formed with the bearing body.

[0012] In this technical solution, the heat dissipation surface layer of the linear bearing allows the bearing to improve airflow efficiency on the bearing body surface through the grooves on both sides, thereby more quickly removing the heat generated during operation. Furthermore, the grooves increase the heat dissipation area on the bearing body surface, further reducing heat generation during use, ensuring the bearing's precision, and extending its service life. Simultaneously, the oil filling section facilitates the user's addition of lubricant to the linear bearing, ensuring effective maintenance and improving work efficiency.

[0013] In the above technical solution, the tank further includes:

[0014] Several axial grooves, the length direction of which is parallel to the axial direction of the bearing body, are evenly distributed at intervals along the circumference of the shaft on the outer surface of the bearing body.

[0015] Several circumferential grooves, which are annular grooves concentrically distributed with the bearing body, and the several circumferential grooves are evenly spaced along the axial direction of the bearing body.

[0016] The circumferential groove and the axial groove are connected at their intersection, and one end of the axial groove extends to the end face of the bearing body and forms an opening.

[0017] In the above technical solution, the oil injection unit further includes:

[0018] Oil injection hole, the oil injection hole is provided on the bearing body;

[0019] A retaining sleeve is disposed in the oil injection hole;

[0020] A pressure cap, wherein the pressure cap is movably disposed in a fixed sleeve and can move up and down along the axial direction of the fixed sleeve, and the pressure cap is fixed to the fixed sleeve in the circumferential direction;

[0021] An oil drum is rotatably mounted in a fixed sleeve, and two radially symmetrically distributed arc-shaped guide grooves are provided on the outer side wall of the oil drum.

[0022] An input port is provided on the top of the pressure cap, and a sealing cap is provided in the input port;

[0023] An elastic telescopic rod is installed inside the oil drum;

[0024] The bottom of the fixed sleeve is provided with an oil leakage hole in communication with the inside of the retainer, the bottom of the oil tank is provided with a through hole, the movable cover of the gland is arranged on the oil tank, the inner wall of the gland is provided with a guide block in sliding fit with the arc-shaped guide groove, and the sealing cover is connected with the top end of the elastic telescopic rod.

[0025] In the above technical solution, further comprising:

[0026] A sealing ring is arranged between the outer wall of the fixed sleeve and the inner wall of the oil injection hole.

[0027] In the above technical solution, further, the sealing ring further comprises:

[0028] A pressure bearing groove is annular and concentrically distributed with the sealing ring, and is arranged on the upper and lower side surfaces of the sealing ring, and the cross section of the pressure bearing groove is V-shaped.

[0029] A pressure bearing plate is movably arranged in the pressure bearing groove, and the bottom of the pressure bearing plate is provided with an elastic supporting plate connected with the bottom of the pressure bearing groove.

[0030] The beneficial effects of the present application are:

[0031] 1. The heat dissipation surface layer can quickly take away the heat generated in the working process of the linear bearing, reduce the generation of linear bearing heating phenomenon, ensure the precision of the linear bearing, and improve the service life of the linear bearing.

[0032] 2. The oil injection part is arranged to facilitate the user to add lubricant to the inside of the linear bearing, ensure the maintenance effect of the linear bearing, and improve the working efficiency.

[0033] 3. The sealing ring is arranged to improve the sealing effect between the fixed sleeve and the oil injection hole, and reduce the occurrence of lubricant leakage phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0035] Figure 1 The present application is a specific embodiment structure schematic diagram.

[0036] Figure 2 The present application is a top view structure schematic diagram.

[0037] Figure 3The oil injection part structure schematic view of the utility model.

[0038] Figure 4 The oil bucket structure schematic view of the utility model.

[0039] Figure 5 The sealing ring structure schematic view of the utility model.

[0040] The mark in the figure indicates that:

[0041] 1, bearing main body, 2, retainer, 3, steel ball, 4, gasket, 5, groove body, 50, axial groove, 51, circumferential groove, 6, oil injection part, 60, oil injection hole, 61, fixed sleeve, 62, gland, 63, oil bucket, 64, arc-shaped guide groove, 65, input hole, 66, sealing cover, 67, elastic telescopic rod, 68, oil leakage hole, 69, through hole, 610, guide block, 7, sealing ring, 70, pressure bearing groove, 71, pressure bearing plate, 72, elastic support plate. DETAILED DESCRIPTION

[0042] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0043] In the description of the present application, it should be noted that the terms used herein are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. In order to facilitate the description, the size of each part shown in the drawings is not drawn according to the actual proportional relationship. The technology, method and equipment known to those skilled in the relevant art may not be discussed in detail, but under appropriate circumstances, the technology, method and equipment should be regarded as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0044] Example 1:

[0045] The embodiment of the present application provides a linear bearing, which comprises: a bearing main body 1, a retainer 2 is arranged in the bearing main body 1, a plurality of steel balls 3 are arranged in the retainer 2; a gasket 4 is arranged at both ends of the retainer 2.

[0046] Further comprising: a heat dissipation surface layer, the heat dissipation surface layer is arranged on the outer surface of the bearing body 1, and the heat dissipation surface layer is formed by the groove body 5 arranged on both sides of the bearing body 1; an oil injection part 6, the oil injection part 6 is arranged on the surface of the bearing body 1 for adding lubricating oil to the inside of the retainer 2.

[0047] Wherein, the groove body 5 is integrally formed with the bearing body 1.

[0048] Moreover, the bearing body 1, the retainer 2, the steel ball 3 and the gasket 4 are all uniform and conventional structures, which will not be described here.

[0049] In this embodiment, during the use of the linear bearing, the arrangement of the heat dissipation surface layer enables the linear bearing to improve the air flow efficiency of the surface of the bearing body 1 through the groove body 5 on both sides, thereby more quickly taking away the heat generated during the working process of the linear bearing, and the arrangement of the groove body 5 can also increase the heat dissipation area of the surface of the bearing body 1, thereby further reducing the heating phenomenon of the linear bearing during use, ensuring the precision of the linear bearing and improving the service life of the linear bearing. At the same time, the arrangement of the oil injection part 6 facilitates the user to add lubricant to the inside of the linear bearing, ensures the maintenance effect of the linear bearing and improves the working efficiency.

[0050] Embodiment 2:

[0051] The embodiment provides a linear bearing, in addition to the technical solutions of the above-mentioned embodiments, further having the following technical features, the groove body 5 further comprises: a plurality of axial grooves 50, the length direction of the plurality of axial grooves 50 is parallel to the axial direction of the bearing body 1, and the plurality of axial grooves 50 are uniformly and spacedly distributed on the outer surface of the bearing body 1 along the circumferential direction of the shaft; a plurality of circumferential grooves 51, the circumferential grooves 51 are in the form of ring grooves concentrically distributed with the bearing body 1, and the plurality of circumferential grooves 51 are uniformly and spacedly distributed along the axial direction of the bearing body 1;

[0052] Wherein, the circumferential grooves 51 and the axial grooves 50 are communicated at the intersection, and one end of the axial grooves 50 extends to the end face of the bearing body 1 and forms an opening.

[0053] In this embodiment, during the working process of the linear bearing, with the movement of the bearing body, the airflow can enter the axial grooves 50 through the opening formed by the axial grooves 50 at the end face of the bearing body 1, thereby flowing in the plurality of axial grooves 50 and the plurality of circumferential grooves 51 and taking away the heat generated during the working process of the linear bearing. At the same time, the arrangement of the plurality of axial grooves 50 and the plurality of circumferential grooves 51 can effectively increase the heat dissipation area of the linear bearing through the inner wall of the groove, thereby further reducing the heating phenomenon of the linear bearing during use, ensuring the precision of the linear bearing and improving the service life of the linear bearing.

[0054] Embodiment 3:

[0055] The embodiment provides a linear bearing, in addition to comprising the technical scheme of the above embodiment, further has the following technical features, the oil injection part 6 further comprises: an oil injection hole 60, the oil injection hole 60 is arranged on the bearing body 1;Fixed sleeve 61, fixed sleeve 61 is arranged in the oil injection hole 60;Cover 62, cover 62 is movably arranged in fixed sleeve 61 and can be axially lifted and moved along fixed sleeve 61, cover 62 is fixed in the circumferential direction with fixed sleeve 61;Oil tank 63, oil tank 63 is rotatably arranged in fixed sleeve 61, and two arc-shaped guide grooves 64 radially symmetrical distributed are arranged on the outer side wall of oil tank 63;Input hole 65, input hole 65 is arranged at the top of cover 62, and sealing cover 66 is arranged in input hole 65;Elastic telescopic rod 67, elastic telescopic rod 67 is arranged in oil tank 63;

[0056] Wherein, the bottom of fixed sleeve 61 is provided with oil leakage hole 68 communicated with the inside of retainer, the bottom of oil tank 63 is provided with through hole 69, cover 62 is movably arranged on oil tank 63, guide block 610 is arranged on the inner wall of cover 62 and slidably matched with arc-shaped guide groove 64, sealing cover 66 is connected with the top of elastic telescopic rod 67.

[0057] Moreover, the bottom of oil injection hole 60 penetrates to the inside of bearing body 1, the top of oil injection hole 60 has a limiting groove with a diameter larger than that of oil injection hole 60, the top of fixed sleeve 61 has a limiting convex ring matched with the limiting groove, fixed sleeve 61 is detachably installed in oil injection hole 60 by a mode such as threaded connection mode, the inner wall of fixed sleeve 61 is provided with movable grooves radially symmetrical distributed along fixed sleeve 61, the side wall of cover 62 is provided with movable blocks matched with movable grooves, cover 62 and fixed sleeve 61 are movably lifted and fixed in the circumferential direction through movable blocks and movable grooves, the bottom of movable block is provided with a reset spring for assisting cover 62 to reset, arc-shaped guide groove 64 extends and distributes from the top to the bottom of oil tank 63, the inner diameter of fixed sleeve 61 is matched with the outer diameter of cover 62, the inner diameter of cover 62 is matched with the outer diameter of oil tank 63, the top of oil tank 63 is open, through hole 69 and oil leakage hole 68 are in a separated state in a natural state, sealing cover 66 and input hole 65 can be sealingly matched.

[0058] In the embodiment, when the linear bearing needs to be maintained and lubricant is added, the oil injector is placed on the top of the gland 62 and the gland 62 is pressed downward, during the downward movement of the gland 62, the guide block 610 slides along the arc-shaped guide groove 64, thereby driving the oil bucket 63 to rotate, with the rotation of the oil bucket 63, the through hole 69 at the bottom of the oil bucket 63 gradually moves to the position of the oil leakage hole 68 and finally aligns with the oil leakage hole 68, then the oil injector outputs the lubricant, under the action of pressure, the sealing cover 66 is pressed downward, the elastic telescopic rod 67 is contracted, thereby finally opening the input hole 65, the lubricant enters the oil bucket 63 through the input hole 65 and passes through the through hole 69 and the oil leakage hole 68 to enter the inside of the bearing body 1, lubricating the retainer and the steel ball 3, relative to the prior art, the utility model facilitates the user to add lubricant to the inside of the linear bearing, ensures the maintenance effect of the linear bearing and improves the working efficiency.

[0059] Embodiment 4:

[0060] The embodiment provides a linear bearing, in addition to the technical scheme of the above-mentioned embodiment, further has the following technical features, further comprising: a sealing ring 7, the sealing ring 7 is arranged between the outer wall of the fixed sleeve 61 and the inner wall of the oil injection hole 60.

[0061] The sealing ring 7 further comprises: a pressure bearing groove 70, the pressure bearing groove 70 is annular and concentrically distributed with the sealing ring 7, the pressure bearing groove 70 is arranged on the upper and lower two side surfaces of the sealing ring 7, and the section of the pressure bearing groove 70 is V-shaped;A pressure bearing plate 71 is movably arranged in the pressure bearing groove 70, and the bottom of the pressure bearing plate 71 is provided with an elastic supporting plate 72 connected with the bottom of the pressure bearing groove 70.

[0062] In the embodiment, the sealing effect between the fixed sleeve 61 and the oil injection hole 60 is improved by the arrangement of the sealing ring 7, and the leakage of the lubricant is reduced, and when the lubricant leaks outward, the gradually accumulated lubricant enters the pressure bearing groove 70 and extrudes the pressure bearing plate 71, the pressure bearing plate 71 moves in the pressure bearing groove 70 after being extruded and gradually extrudes and expands the pressure bearing groove 70 to the two sides, finally the side edge of the sealing ring 7 is further attached to the sealing surface, thereby increasing the sealing effect of the sealing ring 7 and preventing the lubricant from further leaking outward.

[0063] The embodiments of the application are described above in combination with the drawings, and the embodiments and the features in the embodiments in the application can be combined with each other without conflict, the application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, all of which belong to the protection of the application.

Claims

1. A linear bearing, comprising: a bearing body (1) provided with a retainer (2) inside, and a plurality of steel balls (3) provided in the retainer (2); a gasket (4) provided at both ends of the retainer (2); characterized in that it further comprises: a heat dissipation surface layer provided on the outer surface of the bearing body (1), the heat dissipation surface layer being composed of grooves (5) provided on both sides of the bearing body (1); an oil injection part (6) provided on the surface of the bearing body (1) for adding lubricating oil to the inside of the retainer (2); wherein the grooves (5) are integrally formed with the bearing body (1).

2. A linear bearing according to claim 1, wherein The grooves (5) further comprise: a plurality of axial grooves (50) whose length direction is parallel to the axial direction of the bearing body (1), and which are uniformly distributed on the outer surface of the bearing body (1) along the circumferential direction of the shaft; a plurality of circumferential grooves (51) in the form of ring grooves concentrically distributed with the bearing body (1), which are uniformly distributed along the axial direction of the bearing body (1); wherein the circumferential grooves (51) and the axial grooves (50) are communicated at the intersection, and one end of the axial grooves (50) extends to the end face of the bearing body (1) and forms an opening.

3. A linear bearing according to claim 2, wherein, The oil injection part (6) further comprises: an oil injection hole (60) provided on the bearing body (1); a fixing sleeve (61) provided in the oil injection hole (60); a gland (62) movably provided in the fixing sleeve (61) and axially movable up and down along the fixing sleeve (61), the gland (62) being fixed in the circumferential direction with the fixing sleeve (61); an oil bucket (63) rotatably provided in the fixing sleeve (61), the outer side wall of the oil bucket (63) being provided with two arc-shaped guide grooves (64) radially symmetrically distributed on the oil bucket (63); an input hole (65) provided on the top of the gland (62), the input hole (65) being provided with a sealing cover (66); an elastic telescopic rod (67) provided in the oil bucket (63); wherein the bottom of the fixing sleeve (61) is provided with an oil leakage hole (68) communicating with the inside of the retainer, the bottom of the oil bucket (63) is provided with a through hole (69), the gland (62) is movably provided on the oil bucket (63), the inner wall of the gland (62) is provided with a guide block (610) slidingly fitted with the arc-shaped guide groove (64), and the sealing cover (66) is connected with the top end of the elastic telescopic rod (67).

4. A linear bearing according to claim 3, wherein Further comprising: a sealing ring (7) provided between the outer wall of the fixing sleeve (61) and the inner wall of the oil injection hole (60).

5. A linear bearing according to claim 4, wherein The sealing ring (7) further comprises: a pressure bearing groove (70) in the form of a ring concentrically distributed with the sealing ring (7), the pressure bearing groove (70) being provided on the upper and lower side surfaces of the sealing ring (7), and the cross section of the pressure bearing groove (70) being in the form of a V shape. A pressure bearing plate (71) is movably arranged in a pressure bearing groove (70), and the bottom of the pressure bearing plate (71) is provided with an elastic support plate (72) connected with the bottom of the pressure bearing groove (70).

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