CN116538193A - Linear ball guide cylinder and assembly method thereof - Google Patents

Linear ball guide cylinder and assembly method thereof Download PDF

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Publication number
CN116538193A
CN116538193A CN202310515788.9A CN202310515788A CN116538193A CN 116538193 A CN116538193 A CN 116538193A CN 202310515788 A CN202310515788 A CN 202310515788A CN 116538193 A CN116538193 A CN 116538193A
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CN
China
Prior art keywords
guide cylinder
guide
shaped groove
cylinder body
ball
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Granted
Application number
CN202310515788.9A
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Chinese (zh)
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CN116538193B (en
Inventor
唐忠
蒋刚
贾勇
高嵩
姜杰
易诗
王倩
杨兰英
胡川妹
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Chengdu Univeristy of Technology
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Chengdu Univeristy of Technology
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Priority to CN202310515788.9A priority Critical patent/CN116538193B/en
Publication of CN116538193A publication Critical patent/CN116538193A/en
Application granted granted Critical
Publication of CN116538193B publication Critical patent/CN116538193B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

The invention provides a linear ball guide cylinder and an assembly method thereof, and relates to the technical field of transmission guide devices. The linear ball guide cylinder comprises a guide cylinder body, a retainer, balls and a guide cylinder end cover; the inner sides of the two ends of the guide cylinder body are also provided with first arc grooves, one end of each first arc groove, which is close to the guide cylinder body, is provided with first L-shaped grooves, the inner sides of the end parts of the two guide cylinder end covers are also provided with second arc grooves, one end of each second arc groove, which is close to the guide cylinder body, is provided with second L-shaped grooves, the two guide cylinder end covers are respectively connected with the two ends of the guide cylinder body in a threaded mode, the first arc grooves and the second arc grooves are combined to form C-shaped grooves, the first L-shaped grooves and the second L-shaped grooves are combined to form U-shaped grooves, ball grooves with uniform intervals are arranged on the retainer, and the balls are assembled in the ball grooves and are located in the C-shaped grooves. The linear ball guide cylinder has reasonable design, easy manufacturing and processing, guaranteed precision, no clamping stagnation phenomenon between the balls, smooth movement, difficult falling and simple disassembly and assembly.

Description

Linear ball guide cylinder and assembly method thereof
Technical Field
The invention relates to the technical field of transmission guide devices, in particular to a linear ball guide cylinder and an assembly method thereof.
Background
Linear guides are widely used in various industrial equipment and precision instruments. In order to ensure the transmission precision of the movement mechanism, a corresponding transmission guide device is often arranged on the movement mechanism, and a common guide device usually consists of a guide cylinder and a guide pillar, and guides the movement mechanism by utilizing the relative movement of the guide cylinder and the guide pillar.
For example, patent application CN105443697a discloses a linear ball guide sleeve in which a plurality of circular arc rolling channels are formed on a rotating shaft to increase rated load. However, the rolling channel of the device is formed in the bearing sleeve shell, so that the manufacturing and processing are difficult, the precision is difficult to ensure, a retainer is not used, the balls are easy to interfere with each other to generate a clamping stagnation phenomenon, and the balls do not smoothly roll in the moving process.
The linear ball guide sleeves disclosed in patent applications CN209164379U and CN207357953U improve the problem of difficult processing of rolling channels (i.e., ball channels) to a certain extent, but the ball channels are not easy to mount retainers, so that the balls are blocked in the moving process.
Disclosure of Invention
The invention aims to provide the linear ball guide cylinder and the assembling method thereof, which have the advantages of reasonable design, easiness in manufacturing and processing, ensured precision, no clamping stagnation phenomenon between balls, smooth movement, difficulty in falling off and simplicity and convenience in disassembly and assembly.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a linear ball guide comprising a guide body, a retainer, balls, and a guide end cap;
the guide cylinder comprises a guide cylinder body, wherein the two ends of the guide cylinder body are respectively provided with external threads, the inner sides of the two ends of the guide cylinder body are respectively provided with a first arc-shaped groove, one end of each first arc-shaped groove, which is close to the guide cylinder body, is provided with a first L-shaped groove, the end parts of the two guide cylinder end covers are respectively provided with internal threads, the inner sides of the end parts of the two guide cylinder end covers are respectively provided with a second arc-shaped groove, one end of each second arc-shaped groove, which is close to the guide cylinder body, is provided with a second L-shaped groove, the two guide cylinder end covers are respectively connected with the two ends of the guide cylinder body in a threaded manner, the first arc-shaped grooves and the second arc-shaped grooves are combined to form a C-shaped groove, the first L-shaped grooves and the second L-shaped grooves are combined to form a U-shaped groove, the openings of the C-shaped grooves and the U-shaped grooves face the center line of the guide cylinder body, the retainer is of a plum blossom-shaped annular structure, the ball grooves with uniform intervals are arranged on the retainer, and the balls are assembled in the ball grooves and are positioned in the C-shaped groove.
The linear ball guide cylinder provided by the embodiment of the invention has the beneficial effects that:
1. the L-shaped groove for accommodating the retainer and the arc-shaped groove for accommodating the ball are formed in the end part of the guide cylinder body and/or the guide cylinder end cover, the L-shaped groove and the arc-shaped groove do not extend along the length direction of the guide cylinder body but are in a plane perpendicular to the length direction, and when the grooves are formed by machining, the grooves can be formed by only clamping a workpiece and controlling the cutter to move for one circle in the horizontal plane, so that the groove can be formed, and the guide cylinder is reasonable in design, easy to manufacture and process and can be guaranteed in precision;
2. the bottom of the C-shaped groove is provided with a U-shaped groove, a retainer is loaded in the U-shaped groove, ball grooves with uniform intervals are arranged on the retainer, and then the balls are assembled in the ball grooves and positioned in the C-shaped groove, so that the relative positions among the balls can be stabilized, the balls cannot be blocked, and the balls move smoothly and are not easy to fall off;
3. the retainer and the ball are clamped between the guide cylinder body and the guide cylinder end cover relatively, and the assembly and the disassembly are simple.
In an alternative embodiment, the first L-shaped groove and the second L-shaped groove are annular and coaxial with the inner wall of the guide cylinder body, and the retainer and the U-shaped groove are in clearance movable fit.
In this way, the friction force of the retainer in the U-shaped groove is reduced, and the retainer can conveniently rotate in the U-shaped groove along with the balls.
In an alternative embodiment, the guide cylinder end cover is further provided with a locking hole on the end surface far away from the guide cylinder body, and the locking hole is used for inserting a clamp spring clamp to screw the guide cylinder end cover.
Therefore, the guide cylinder end cover is conveniently screwed on the guide cylinder body by the locking hole, the assembly precision is improved, and the guide cylinder end cover is also convenient to detach.
In an alternative embodiment, the outer peripheral surface of the retainer is a wavy surface such that the outer peripheral surface of the retainer makes spaced point contact with the bottom surface of the U-shaped groove.
Therefore, the retainer and the bottom surface of the U-shaped groove form point contact at intervals, friction force between the retainer and the bottom surface of the U-shaped groove is greatly reduced, smooth movement of the balls is facilitated, and service life of the component is prolonged.
In an alternative embodiment, the first arcuate slot, the second arcuate slot, and the ball slot each mate with the spherical surface of a ball.
In this way, the C-shaped groove and the ball groove are facilitated to form a stable support for the balls, and the C-shaped groove is smoothly guided for the balls.
In an alternative embodiment, the cross section of the C-shaped groove along the axial direction of the guide cylinder body is a first circular arc, the central angle a of the first circular arc is larger than 180 degrees, and the opening width h1 of the C-shaped groove is smaller than the diameter D of the ball.
Thus, after the first arc-shaped groove and the second arc-shaped groove clamp the ball and form the C-shaped groove, the ball cannot fall off from the opening of the C-shaped groove.
In an alternative embodiment, the height L of the protrusion of the balls relative to the inner wall of the guide cylinder body is such that: l is more than 0 and less than D/2.
The protruding height L of ball satisfies above-mentioned scope, not only can play the effect of support and direction to the part of packing into the inside guide cylinder body, can also avoid protruding height L too big, cause the ball in the inside volume of C-shaped groove less, follow the risk of C-shaped groove to drop too high.
In an alternative embodiment, the cross section of the ball groove along the axial direction of the guide cylinder body is a second circular arc, and the diameter of the second circular arc is equal to the diameter of the first circular arc and is also equal to the diameter of the ball.
Therefore, the surface of the ball can be closely attached to the inner wall of the ball groove and the inner wall of the C-shaped groove, and the smoothness and stability of the rotation of the ball are improved.
In an alternative embodiment, the cross section of the ball groove along the transverse direction of the guide cylinder body is a third circular arc, and the central angle c of the third circular arc meets the following conditions: c is more than or equal to 90 degrees and less than or equal to 180 degrees, and the thickness h2 of the retainer along the axial direction of the guide cylinder body is less than or equal to D/2.
Because the balls can not fall off from the C-shaped groove, the retainer is not required to limit the falling of the balls, and the wrapping range of the retainer on the balls can be reduced by only keeping the relative positions among the balls stable, so that the central angle C of the ball groove can be reduced to meet the following conditions: c is more than or equal to 90 degrees and less than or equal to 180 degrees, the thickness h2 of the retainer is less than or equal to D/2, the structure of the retainer is simplified, and the production cost and the manufacturing difficulty are reduced.
In a second aspect, the present invention provides a method for assembling a linear ball guide, the method being applied to the linear ball guide of the foregoing embodiment, the method comprising:
step one: selecting any one end of the guide cylinder body as a current assembly end, and vertically placing the guide cylinder body so that the current assembly end is vertically upwards;
step two: placing a retainer in a first L-shaped groove on the current assembly end in step one;
step three: placing the balls in ball grooves on the retainer in the second step to form movable fit;
step four: the inner thread on the guide cylinder end cover is connected with the outer thread on the guide cylinder body in a screw pair mode, and therefore the second L-shaped groove on the guide cylinder end cover is in movable fit with the retainer;
step five: the guide cylinder end cover is rotated to realize the screwing of the internal thread on the guide cylinder end cover and the external thread on the guide cylinder body, or the guide cylinder end cover is screwed by using a clamp spring clamp through a locking hole on the guide cylinder end cover;
step six: taking the other end of the guide cylinder body as a current assembly end, and vertically placing the guide cylinder body so that the current assembly end is vertically upwards;
step seven: and repeating the second step to the fifth step to finish the assembly of the other end of the guide cylinder body.
Therefore, based on the ingenious structure of the linear ball guide cylinder, the simple and efficient assembly method can be adopted, and the assembly accuracy is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of protection of the present invention, and other related drawings can be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of an assembly structure of a linear ball guide provided in an embodiment of the present invention;
fig. 2 is an exploded view of a linear ball guide according to an embodiment of the present invention;
FIG. 3 is a schematic axial full section of a linear ball guide provided by an embodiment of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic illustration of FIG. 4 with the cage and balls omitted;
FIG. 6 is a schematic top view of the guide body;
FIG. 7 is a schematic view of an axial full section of the guide body;
FIG. 8 is a schematic bottom view of a cartridge end cap;
FIG. 9 is a schematic axial full section of a guide tube end cap;
FIG. 10 is a schematic top view of the retainer;
fig. 11 is a cross-sectional view taken along line A-A in fig. 10.
Icon: 100-a linear ball guide; 1-a guide cylinder body; 11-external threads; 12-a first arc-shaped groove; 13-a first L-shaped groove; 2-a guide cylinder end cover; 21-internal threads; 22-locking holes; 23-a second arcuate slot; 24-a second L-shaped groove; a 3-C-shaped groove; 31-a first arc; 4-U-shaped grooves; 5-a retainer; 51-ball grooves; 52-a second arc; 53-a third arc; 54-fourth arc; 6-ball.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1 to 3, the present embodiment provides a linear ball guide 100, and the linear ball guide 100 includes a guide body 1, a retainer 5, balls 6, and a guide end cap 2.
The guide cylinder body 1, the retainer 5, the balls 6 and the guide cylinder end cover 2 are all of symmetrical structures, and the inner diameter of the guide cylinder body 1 is equal to the inner diameter of the guide cylinder end cover 2 and coaxial with the inner diameter of the guide cylinder end cover 2. The two ends of the guide cylinder body 1 are respectively provided with external threads 11, the ends of the two guide cylinder end covers 2 are respectively provided with internal threads 21, and the two guide cylinder end covers 2 are respectively in threaded connection with the two ends of the guide cylinder body 1.
The end face of the guide cylinder end cover 2, which is far away from the guide cylinder body 1, is also provided with a locking hole 22, and the locking hole 22 is used for inserting a clamp spring clamp to screw the guide cylinder end cover 2. Thus, the guide cylinder end cover 2 is conveniently screwed on the guide cylinder body 1 by the locking hole 22, the assembly precision is improved, and the disassembly is also convenient.
Referring to fig. 4 to 9, the inner sides of the two ends of the guide body 1 are further provided with a first arc-shaped groove 12, and one end of the first arc-shaped groove 12, which is close to the guide body 1, is provided with a first L-shaped groove 13.
The inner sides of the end parts of the two guide cylinder end covers 2 are also provided with second arc grooves 23, and one end of each second arc groove 23, which is close to the guide cylinder body 1, is provided with a second L-shaped groove 24.
The two guide cylinder end covers 2 are respectively in threaded connection with the two ends of the guide cylinder body 1, the first arc-shaped groove 12 and the second arc-shaped groove 23 are combined to form a C-shaped groove 3, the first L-shaped groove 13 and the second L-shaped groove 24 are combined to form a U-shaped groove 4, and the openings of the C-shaped groove 3 and the U-shaped groove 4 face the center line of the guide cylinder body 1.
Referring to fig. 4 and 5, the cross section of the C-shaped groove 3 along the axial direction of the guide body 1 is a first arc 31, the center angle a of the first arc 31 is greater than 180 °, and the opening width h1 of the C-shaped groove 3 is smaller than the diameter D of the ball 6. In this way, after the first arcuate groove 12 and the second arcuate groove 23 sandwich the ball 6 and form the C-shaped groove 3, the ball 6 does not fall out of the opening of the C-shaped groove 3.
The height L of the protrusion of the balls 6 with respect to the inner wall of the guide cylinder body 1 satisfies: l is more than 0 and less than D/2. The protruding height L of the ball 6 meets the range, not only can play a role in supporting and guiding parts in the guide cylinder body, but also can avoid overlarge protruding height L, and the ball 6 is small in size in the C-shaped groove 3 and excessively high in risk of falling off from the C-shaped groove 3.
The first L-shaped groove 13 and the second L-shaped groove 24 are annular and coaxial with the inner wall of the guide cylinder body 1, and the retainer 5 and the U-shaped groove 4 are in clearance movable fit. In this way, the friction of the cage 5 in the U-shaped groove 4 is reduced, facilitating the rotation of the cage 5 with the balls 6 in the U-shaped groove 4.
Referring to fig. 10, the retainer 5 has a ring-shaped structure of a plum blossom shape, ball grooves 51 are provided on the retainer 5 at uniform intervals, and balls 6 are fitted in the ball grooves 51 and located in the C-shaped groove 3. In this way, the balls 6 are uniformly spaced by the ball grooves 51 on the cage 5, the balls 6 are prevented from interfering with each other to cause a jamming phenomenon when rolling, and the number of the balls 6 matches the number of the ball grooves 51 on the cage 5.
The first arc-shaped groove 12, the second arc-shaped groove 23 and the ball groove 51 are all engaged with the spherical surface of the ball 6. In this way, the C-shaped groove 3 and the ball groove 51 are facilitated to form stable support for the balls 6, and the C-shaped groove 3 is formed to smoothly guide the balls 6.
The outer peripheral surface of the holder 5 is a wavy surface, so that the outer peripheral surface of the holder 5 is in spaced point contact with the bottom surface of the U-shaped groove 4. In this way, the retainer 5 and the bottom surface of the U-shaped groove 4 form point contact with each other at intervals, so that friction force between the retainer 5 and the bottom surface of the U-shaped groove 4 is greatly reduced, smooth movement of the balls 6 is facilitated, and service life of the component is prolonged.
The cross section of the ball groove 51 along the transverse direction of the guide cylinder body 1 is a third circular arc 53, and the central angle c of the third circular arc 53 meets the following conditions: since the balls 6 themselves do not fall off from the C-shaped grooves 3, the retainer 5 is not required to restrict the falling off of the balls 6, and the wrapping range of the retainer 5 on the balls 6 can be reduced by only keeping the relative positions between the balls 6 stable, so that the center angle C of the ball grooves 51 can be reduced to satisfy: c is more than or equal to 90 degrees and less than or equal to 180 degrees, the structure of the retainer 5 is simplified, the production cost and the manufacturing difficulty are reduced, and the retainer 5 is prevented from protruding from the inner wall of the guide cylinder body 1 and scratching elements in the guide cylinder body 1.
Referring to fig. 11, the cross section of the ball groove 51 along the axial direction of the guide body 1 is a second circular arc 52, the outer surface of the bottom wall of the ball groove 51 is a fourth circular arc 54, the diameter of the second circular arc 52, the diameter of the first circular arc 31 and the diameter of the ball 6 are all equal, and the fourth circular arc 54 and the second circular arc 52 are concentric circular arcs. Thus, the surface of the ball 6 can be closely attached to the inner wall of the ball groove 51 and the inner wall of the C-shaped groove 3, and the smoothness and stability of the rotation of the ball 6 can be improved.
The thickness h2 of the retainer 5 along the axial direction of the guide cylinder body 1 is less than or equal to D/2, the structure of the retainer 5 is simplified, and the production cost and the manufacturing difficulty are reduced.
The present embodiment provides an assembling method of a linear ball guide 100, which is applied to the linear ball guide 100 of the foregoing embodiment, and includes:
step one: selecting any one end of the guide cylinder body 1 as a current assembly end, and vertically placing the guide cylinder body 1 so that the current assembly end is vertically upwards;
step two: placing the retainer 5 in the first L-shaped groove 13 on the current assembly end in step one;
step three: placing the balls 6 in the ball grooves 51 on the retainer 5 in the second step to form a movable fit;
step four: the internal thread 21 on the guide cylinder end cover 2 is connected with the external thread 11 on the guide cylinder body 1 in a screw pair manner, so that a second L-shaped groove 24 on the guide cylinder end cover 2 is in movable fit with the retainer 5;
step five: the guide cylinder end cover 2 is rotated to realize the screwing of the internal thread 21 on the guide cylinder end cover and the external thread 11 on the guide cylinder body 1, or the guide cylinder end cover 2 is screwed by using a clamp spring clamp through a locking hole 22 on the guide cylinder end cover 2;
step six: taking the other end of the guide cylinder body 1 as a current assembly end, and vertically placing the guide cylinder body 1 so that the current assembly end is vertically upwards;
step seven: and repeating the second step to the fifth step to finish the assembly of the other end of the guide cylinder body 1.
The linear ball guide 100 and the assembling method thereof provided in this embodiment have the following advantages:
1. the L-shaped groove for accommodating the retainer 5 and the arc-shaped groove for accommodating the ball 6 are formed at the end parts of the guide cylinder body 1 and/or the guide cylinder end cover 2, and the L-shaped groove and the arc-shaped groove do not extend along the length direction of the guide cylinder body 1 but are in a plane perpendicular to the length direction, when the grooves are formed by machining, only a workpiece is clamped, and the cutter is controlled to move in the horizontal plane for one circle, so that the forming of one groove can be completed, and the guide cylinder end cover is reasonable in design, easy to manufacture and process and can ensure the precision;
2. the bottom of the C-shaped groove 3 is provided with a U-shaped groove 4, a retainer 5 is loaded in the U-shaped groove 4, ball grooves 51 with uniform intervals are arranged on the retainer 5, and then balls 6 are assembled in the ball grooves 51 and positioned in the C-shaped groove 3, so that the relative positions among the balls 6 can be stabilized, the balls 6 cannot be blocked, and the balls are smooth in movement and are not easy to fall off;
3. the retainer 5 and the balls 6 are clamped between the guide body 1 and the guide end cap 2, and are easy to assemble and disassemble.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. The linear ball guide cylinder is characterized by comprising a guide cylinder body (1), a retainer (5), balls (6) and a guide cylinder end cover (2);
external threads (11) are arranged at two ends of the guide cylinder body (1), first arc grooves (12) are further arranged at inner sides of two ends of the guide cylinder body (1), first L-shaped grooves (13) are formed in one end, close to the guide cylinder body (1), of the first arc grooves (12), internal threads (21) are formed in the end portions of the guide cylinder end covers (2), second arc grooves (23) are further formed in inner sides of the end portions of the guide cylinder end covers (2), second L-shaped grooves (24) are formed in one end, close to the guide cylinder body (1), of the second arc grooves (23), the two guide cylinder end covers (2) are respectively connected with the two ends of the guide cylinder body (1) in a threaded manner, the first arc-shaped groove (12) and the second arc-shaped groove (23) are combined to form a C-shaped groove (3), the first L-shaped groove (13) and the second L-shaped groove (24) are combined to form a U-shaped groove (4), the openings of the C-shaped groove (3) and the U-shaped groove (4) face the center line of the guide cylinder body (1), the retainer (5) is of a plum blossom-shaped annular structure, ball grooves (51) with uniform intervals are arranged on the retainer (5), and balls (6) are assembled in the ball grooves (51), and is positioned in the C-shaped groove (3).
2. The linear ball guide according to claim 1, characterized in that the first L-shaped groove (13) and the second L-shaped groove (24) are both annular and coaxial with the guide inner wall of the guide body (1), and the retainer (5) and the U-shaped groove (4) are in clearance movable fit.
3. The linear ball guide according to claim 1, characterized in that the guide end cap (2) is further provided with a locking hole (22) on an end surface remote from the guide body (1), the locking hole (22) being used for inserting a snap spring clamp to screw the guide end cap (2).
4. The linear ball guide according to claim 1, characterized in that the outer circumferential surface of the retainer (5) is a wavy surface, with the outer circumferential surface of the retainer (5) being in spaced point contact with the bottom surface of the U-shaped groove (4).
5. The linear ball guide according to claim 1, characterized in that the first arc-shaped groove (12), the second arc-shaped groove (23) and the ball groove (51) are each fitted with the spherical surface of the ball (6).
6. The linear ball guide according to claim 5, characterized in that the cross section of the C-shaped groove (3) along the axial direction of the guide body (1) is a first circular arc (31), the central angle a of the first circular arc (31) is larger than 180 °, and the opening width h1 of the C-shaped groove (3) is smaller than the diameter D of the ball (6).
7. The linear ball guide according to claim 6, characterized in that the height L of the protrusion of the balls (6) with respect to the guide inner wall of the guide body (1) is such that: l is more than 0 and less than D/2.
8. The linear ball guide according to claim 6, characterized in that the cross section of the ball groove (51) along the axial direction of the guide body (1) is a second circular arc (52), the diameter of the second circular arc (52) being equal to the diameter of the first circular arc (31) and also to the diameter of the ball (6).
9. The linear ball guide according to claim 6, characterized in that the cross section of the ball groove (51) along the lateral direction of the guide body (1) is a third circular arc (53), the central angle c of the third circular arc (53) satisfying: c is more than or equal to 90 degrees and less than or equal to 180 degrees, and the thickness h2 of the retainer (5) along the axial direction of the guide cylinder body (1) is less than or equal to D/2.
10. A method of assembling a linear ball guide, the method of assembling being applied to the linear ball guide of claim 1, the method of assembling comprising:
step one: selecting any one end of the guide cylinder body (1) as a current assembly end, and vertically placing the guide cylinder body (1) so that the current assembly end is vertically upwards;
step two: -placing said retainer (5) in a first L-shaped recess (13) on said current assembly end in said step one;
step three: placing the balls (6) in the ball grooves (51) on the retainer (5) in the second step to form a movable fit;
step four: the inner thread (21) on the guide cylinder end cover (2) is connected with the outer thread (11) on the guide cylinder body (1) in a threaded pair mode, and therefore a second L-shaped groove (24) on the guide cylinder end cover (2) is in movable fit with the retainer (5);
step five: the guide cylinder end cover (2) is rotated to realize the screwing of an internal thread (21) on the guide cylinder end cover and an external thread (11) on the guide cylinder body (1), or the guide cylinder end cover (2) is screwed by using a clamp spring clamp through a locking hole (22) on the guide cylinder end cover (2);
step six: taking the other end of the guide cylinder body (1) as a current assembly end, and vertically placing the guide cylinder body (1) so as to enable the current assembly end to be vertically upwards;
step seven: and repeating the second step to the fifth step to finish the assembly of the other end of the guide cylinder body (1).
CN202310515788.9A 2023-05-08 2023-05-08 Linear ball guide cylinder and assembly method thereof Active CN116538193B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168767A (en) * 1990-06-04 1992-12-08 Nippon Thompson Co., Ltd. Compact ball screw assembly
JPH10267035A (en) * 1997-03-24 1998-10-06 Brother Ind Ltd Direct acting ball bearing
KR101079153B1 (en) * 2011-04-29 2011-11-02 홍의택 A linear bearing
CN105952794A (en) * 2016-06-14 2016-09-21 宁波美亚特精密传动部件有限公司 Linear motion bearing
CN210240315U (en) * 2019-07-27 2020-04-03 丽水市贝斯特轴承有限公司 Flange linear bearing
CN214465558U (en) * 2020-12-28 2021-10-22 新化县永标电子陶瓷科技有限公司 High-wear-resistance ceramic bearing
CN218325795U (en) * 2022-10-24 2023-01-17 上银科技股份有限公司 Ball spline capable of automatically loading balls

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168767A (en) * 1990-06-04 1992-12-08 Nippon Thompson Co., Ltd. Compact ball screw assembly
JPH10267035A (en) * 1997-03-24 1998-10-06 Brother Ind Ltd Direct acting ball bearing
KR101079153B1 (en) * 2011-04-29 2011-11-02 홍의택 A linear bearing
CN105952794A (en) * 2016-06-14 2016-09-21 宁波美亚特精密传动部件有限公司 Linear motion bearing
CN210240315U (en) * 2019-07-27 2020-04-03 丽水市贝斯特轴承有限公司 Flange linear bearing
CN214465558U (en) * 2020-12-28 2021-10-22 新化县永标电子陶瓷科技有限公司 High-wear-resistance ceramic bearing
CN218325795U (en) * 2022-10-24 2023-01-17 上银科技股份有限公司 Ball spline capable of automatically loading balls

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