CN111288136A

CN111288136A - Ball screw

Info

Publication number: CN111288136A
Application number: CN202010250961.3A
Authority: CN
Inventors: 耿思宇
Original assignee: 耿思宇
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-06-16

Abstract

The invention relates to a ball screw, which comprises a screw rod, a nut and a sealing ring, wherein the middle of the screw rod is sleeved with the nut, the sealing ring is symmetrically arranged at the left end and the right end of the nut, thread grooves are formed in the outer wall of the screw rod and the inner wall of the nut, balls are arranged in the thread grooves formed in the inner wall of the thread in a rolling mode, the screw rod comprises a main body, an elongated part, a connecting part and an end cover, the connecting part comprises a base plate, a guide post, a connecting plate, an extrusion block and a conical screw rod, and the nut comprises a shell. The screw rod lubricating device is composed of a splicing structure with a smooth outer surface, the length of the screw rod can be increased according to actual needs, the screw rod lubricating device can replace a manual mode to achieve the purpose of lubricating the surface of the screw rod intermittently, the workload of workers is reduced, and in addition, the two rubber rings arranged at intervals can effectively reduce the sliding friction between the rubber rings and the surface of the screw rod while playing the dustproof and antifouling roles.

Description

Ball screw

Technical Field

The invention relates to the field of hardware workpieces, in particular to a ball screw.

Background

The ball screw is the most commonly used transmission element on tool machinery and precision machinery, and has the main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and has the characteristics of high precision, reversibility and high efficiency. Ball screws are widely used in various industrial equipments and precision instruments due to their small frictional resistance.

The existing ball screw has the following problems in the actual use process:

a. when the working stroke of the screw rod is long, in order to facilitate manufacture and save cost, a plurality of short screw rods are usually selected to be spliced into a long screw rod through the insert sleeve, a completely smooth curved surface cannot be formed between the insert sleeve and the outer wall of the screw rod, and the movement of the nut is hindered to a certain extent;

b. in order to prolong the service life and smooth operation of the screw, the screw needs to be lubricated regularly, the lubricating mode of the screw comprises lubricating oil lubrication and lubricating grease lubrication, the lubricating effect of the lubricating oil lubrication is more ideal, but when the lubricating oil is added in a manual mode, the adding amount of the lubricating oil cannot be accurately controlled, so that leakage is easily caused due to excessive adding amount of the lubricating oil, waste is caused, and the surface of the screw is polluted.

In order to solve the above problems, the present invention provides a ball screw.

Disclosure of Invention

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a ball screw comprises a screw rod, a nut and a sealing ring, wherein the nut is sleeved in the middle of the screw rod, the sealing ring is symmetrically arranged at the left end and the right end of the nut, thread grooves are formed in the outer wall of the screw rod and the inner wall of the nut, and balls are arranged in the thread grooves formed in the inner wall of the thread in a rolling mode; wherein:

the screw comprises a main body, an elongated part, a connecting part and an end cover, wherein the main body is of a hollow structure with an opening at the right end, a connecting lug is arranged on the inner wall of the right end of the main body, the right end of the main body is clung to the left end of the elongated part, the elongated part is of a hollow structure with openings at the left and right sides, the elongated part is connected with the main body through the connecting part, the right end of the connecting part is connected with the end cover, and the end cover is arranged at the right; the extension part with the corresponding length can be selected according to the actual requirement in the working process, the main body part and the extension part are connected from the inside through the connecting part, no protrusion is formed between the main body and the outer wall of the extension part, and the nut is prevented from being hindered from moving.

The connecting part comprises a substrate, guide posts, a connecting plate, extrusion blocks and conical screws, the substrate is arranged on the inner wall of the lengthening part in a clamping mode, the guide posts are uniformly arranged at the upper end and the lower end of the substrate from left to right, the top ends of the guide posts are connected with one end of the connecting plate in a sliding fit mode, a connecting groove is formed in the other end of the connecting plate, the inner wall of the connecting groove is connected with the connecting lug in a sliding fit mode, the extrusion blocks are arranged on the inner side of the right end of the connecting plate, the conical screws are arranged between the extrusion blocks which are symmetrically arranged up and down, and the; the purpose of driving the extrusion block to move inwards or outwards can be achieved by rotating the conical screw rod, when the extrusion block moves outwards and the connection lug is tightly attached to the connection groove, the purpose of connecting the lengthening part with the main body is achieved, and when the lengthening part needs to be detached, the conical screw rod rotates reversely until the connection lug is not in contact with the connection groove.

The nut comprises a shell, an oil through groove, an oil injection pipe and an oil outlet pipe, the shell is sleeved in the middle of the screw rod, the oil through groove is uniformly formed in the upper end and the lower end of the shell from left to right, the oil through groove is of a Y-shaped structure, the left opening and the right opening of the oil through groove are tightly attached to balls, the oil injection pipe is arranged in the middle of the oil through groove at the upper end of the shell, and the oil outlet pipe is arranged in the middle of the oil through; the oiling pipe can store a small amount of lubricating oil, consequently need not regularly to lubricate the lead screw through artifical mode, has alleviateed staff's work burden, and the oil pipe can be collected adhesion unnecessary lubricating oil on the ball, avoids causing the waste and reveals the pollution.

Preferably, the sealing ring comprises an outer sealing ring, an inner sealing ring, clamping blocks and a rubber ring, the outer sealing ring is connected with the inner sealing ring through screws, the inner sealing ring is installed on the side wall of the shell through screws, the clamping blocks are symmetrically installed on the inner sides of the outer sealing ring and the inner sealing ring up and down, and the rubber ring is tightly pressed between the clamping blocks and the corresponding outer sealing ring or inner sealing ring; two rubber rings arranged at left and right intervals can achieve good sealing effect when working, and can reduce sliding friction between the rubber rings and the screw rod, thereby reducing the abrasion degree of the screw rod in the rotating process.

Preferably, the oil filling pipe comprises a sealing cover, a pipe body and blocking pieces, the sealing cover is installed at the top end of the oil through groove in a threaded fit mode, the lower end of the sealing cover is connected with the upper end of the pipe body in a clamping mode, the lower end of the pipe body is of a funnel-shaped structure, and the blocking pieces are installed on the inner wall of the pipe body in a left-right staggered mode; after the sealing cover is opened and proper amount of lubricating oil is injected into the pipe body, the sealing cover and the pipe body are then installed into the oil through groove, the lubricating oil flowing out of the pipe body adheres to the surface of the ball, the ball can paint the lubricating oil on the surface of the screw rod in the rolling process, the separation blade can prolong the dripping time of the lubricating oil, and the purpose of lubricating the screw rod intermittently is achieved.

Preferably, the oil outlet pipe is installed in the oil through groove in a threaded fit mode, and the funnel-shaped receiving port is formed in the upper end of the oil outlet pipe, so that redundant lubricating oil adhered to the ball can be conveniently received, and leakage and waste of the lubricating oil are avoided.

Preferably, the fixture blocks are mounted on the inner walls of the corresponding outer sealing rings or inner sealing rings through hinges, the rubber rings are conveniently detached and replaced, and after the sealing rings are mounted, the two fixture blocks are tightly attached to each other, so that the rubber rings can be compressed and positioned, and the sealing effect is ensured.

Preferably, the reverser is embedded on the inner wall of the nut, so that the ball can rotate circularly in a thread groove formed in the inner wall of the nut.

Preferably, the sealing cover and the top end of the oil outlet pipe are both provided with a straight groove, so that the sealing cover or the oil outlet pipe can be unscrewed by using a tool.

The invention has the beneficial effects that:

1. the ball screw provided by the invention is composed of a splicing structure with a smooth outer surface, the length of the ball screw can be increased according to actual needs, the purpose of lubricating the surface of the screw rod intermittently can be realized by replacing a manual mode, the workload of workers is reduced, and in addition, the two rubber rings arranged at intervals play a dustproof and antifouling role and can effectively reduce the sliding friction between the rubber rings and the surface of the screw rod.

2. The screw designed by the invention can select the lengthened part with corresponding length according to the actual requirement during working, and the main body part and the lengthened part are connected from the inside through the connecting part, so that no bulge is formed between the main body and the outer wall of the lengthened part, and the movement of the nut is prevented from being hindered.

3. According to the sealing ring designed by the invention, the two rubber rings which are arranged at intervals from left to right are arranged, so that a good sealing effect can be achieved, the aim of reducing sliding friction generated between the rubber rings and the screw rod is fulfilled, and the abrasion degree of the screw rod in the rotating process is reduced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a front cross-sectional view of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 of the present invention;

FIG. 5 is an enlarged view of the invention in the direction X of FIG. 3;

FIG. 6 is an enlarged view of a portion of the invention taken in the direction of Y in FIG. 3.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 to 6, the ball screw comprises a screw shaft 1, a nut 2 and a sealing ring 3, wherein the nut 2 is sleeved in the middle of the screw shaft 1, the sealing rings 3 are symmetrically installed at the left end and the right end of the nut 2, thread grooves are formed in the outer wall of the screw shaft 1 and the inner wall of the nut 2, and balls are installed in the thread grooves formed in the inner wall of the thread in a rolling manner; wherein:

the lead screw 1 comprises a main body 11, an elongated part 12, a connecting part 13 and an end cover 14, wherein the main body 11 is of a hollow structure with an opening at the right end, a connecting lug 11a is arranged on the inner wall of the right end of the main body 11, the right end of the main body 11 is tightly attached to the left end of the elongated part 12, the elongated part 12 is of a hollow structure with an opening at the left and right sides, the elongated part 12 is connected with the main body 11 through the connecting part 13, the right end of the connecting part 13 is connected with the end cover 14, and the end cover 14 is arranged at the; the length of the extension part 12 can be selected according to actual needs during operation, and the main body 11 and the extension part 12 are connected from the inside through the connecting part 13, so that no bulge is formed between the outer walls of the main body 11 and the extension part 12, and the movement of the nut 2 is prevented from being hindered.

The connecting part 13 comprises a base plate 131, guide posts 132, a connecting plate 133, extrusion blocks 134 and conical screws 135, the base plate 131 is mounted on the inner wall of the lengthening part 12 in a clamping manner, the guide posts 132 are uniformly mounted at the upper end and the lower end of the base plate 131 from left to right, the top ends of the guide posts 132 are connected with one end of the connecting plate 133 in a sliding fit manner, a connecting groove is formed in the other end of the connecting plate 133, the inner wall of the connecting groove is connected with the connecting lug 11a in a sliding fit manner, the extrusion blocks 134 are mounted on the inner side of the right end of the connecting plate 133, the conical screws 135 are arranged between the extrusion blocks 134 which are symmetrically arranged up and down, and the; the purpose of driving the extrusion block 134 to move inwards or outwards can be achieved by rotating the conical screw 135, when the extrusion block 134 moves outwards until the connection lug 11a is tightly attached to the connection groove, the purpose of connecting the extension part 12 with the main body 11 is achieved, and when the extension part 12 needs to be detached, the conical screw 135 rotates reversely until the connection lug 11a does not contact with the connection groove.

The nut 2 comprises a shell 21, an oil through groove 22, an oil injection pipe 23 and an oil outlet pipe 24, the shell 21 is sleeved in the middle of the screw rod 1, the upper end and the lower end of the shell 21 are uniformly provided with the oil through grooves 22 from left to right, the oil through groove 22 is of a Y-shaped structure, openings of the left side and the right side of the oil through groove 22 are tightly attached to balls, the oil injection pipe 23 is arranged in the middle of the oil through groove 22 at the upper end of the shell 21, the oil outlet pipe 24 is arranged in the middle of the oil through groove 22 at the lower end of the shell 21, and an reverser is embedded in the inner wall of the nut 2, so that; the oiling pipe 23 can store a small amount of lubricating oil, so the screw 1 is not required to be lubricated regularly through a manual mode, the workload of workers is reduced, the oil outlet pipe 24 can collect the redundant lubricating oil adhered to the balls, and the waste and leakage pollution are avoided.

The oil filling pipe 23 comprises a sealing cover 231, a pipe body 232 and blocking pieces 233, the sealing cover 231 is installed at the top end of the oil through groove 22 in a threaded fit mode, the lower end of the sealing cover 231 is connected with the upper end of the pipe body 232 in a clamping mode, the lower end of the pipe body 232 is of a funnel-shaped structure, and the blocking pieces 233 are installed on the inner wall of the pipe body 232 in a left-right staggered mode; after the sealing cover 231 is opened to inject a proper amount of lubricating oil into the tube body 232, the sealing cover 231 and the tube body 232 are then arranged into the oil through groove 22, the lubricating oil flowing out of the tube body 232 adheres to the surface of the ball, the ball can be coated on the surface of the lead screw 1 in the rolling process, the blocking piece 233 can prolong the dripping time of the lubricating oil, and the purpose of lubricating the lead screw 1 intermittently is achieved.

The sealing cover 231 and the top end of the oil outlet pipe 24 are both provided with a straight groove, so that the sealing cover 231 or the oil outlet pipe 24 can be unscrewed by using a tool.

The oil outlet pipe 24 is installed in the oil through groove 22 in a threaded matching mode, and the funnel-shaped receiving port is formed in the upper end of the oil outlet pipe 24, so that the excessive lubricating oil adhered to the balls can be conveniently received, and the leakage and waste of the lubricating oil are avoided.

The sealing ring 3 comprises an outer sealing ring 31, an inner sealing ring 32, clamping blocks 33 and a rubber ring 34, the outer sealing ring 31 is connected with the inner sealing ring 32 through screws, the inner sealing ring 32 is installed on the side wall of the shell 21 through screws, the clamping blocks 33 are installed on the inner sides of the outer sealing ring 31 and the inner sealing ring 32 in a vertically symmetrical mode, and the rubber ring 34 is tightly pressed between the clamping blocks 33 and the corresponding outer sealing ring 31 or inner sealing ring 32; the two rubber rings 34 which are arranged at the left side and the right side at intervals can achieve a good sealing effect during working, and can reduce sliding friction generated between the rubber rings 34 and the lead screw 1, thereby reducing the abrasion degree of the lead screw 1 in the rotating process.

The fixture blocks 33 are mounted on the inner walls of the corresponding outer sealing rings 31 or the inner sealing rings 32 through hinges, the rubber rings 34 are conveniently detached and replaced, and after the sealing rings 3 are mounted, the two fixture blocks 33 are tightly attached to each other, so that the rubber rings 34 can be compressed and positioned, and the sealing effect is guaranteed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as hereinafter claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a ball, includes lead screw (1), nut (2) and sealing ring (3), its characterized in that: the middle of the screw rod (1) is sleeved with a nut (2), sealing rings (3) are symmetrically arranged at the left end and the right end of the nut (2), thread grooves are formed in the outer wall of the screw rod (1) and the inner wall of the nut (2), and balls are arranged in the thread grooves formed in the inner wall of the thread in a rolling mode; wherein:

the lead screw (1) comprises a main body (11), an elongated part (12), a connecting part (13) and an end cover (14), wherein the main body (11) is of a hollow structure with an opening at the right end, a connecting lug (11a) is arranged on the inner wall of the right end of the main body (11), the right end of the main body (11) is closely attached to the left end of the elongated part (12), the elongated part (12) is of a hollow structure with openings at the left and right sides, the elongated part (12) is connected with the main body (11) through the connecting part (13), the right end of the connecting part (13) is connected with the end cover (14), and the end cover (14) is installed at the right end of the elongated part;

the connecting part (13) comprises a substrate (131), guide posts (132), a connecting plate (133), extrusion blocks (134) and conical screws (135), the substrate (131) is installed on the inner wall of the lengthening part (12) in a clamping mode, the guide posts (132) are evenly installed at the upper end and the lower end of the substrate (131) from left to right, the top ends of the guide posts (132) are connected with one end of the connecting plate (133) in a sliding fit mode, a connecting groove is formed in the other end of the connecting plate (133), the inner wall of the connecting groove is connected with the connecting lug (11a) in a sliding fit mode, the extrusion blocks (134) are installed on the inner side of the right end of the connecting plate (133), the conical screws (135) are arranged between the extrusion blocks (134) which are symmetrically arranged up and down, and the conical screws (135) are;

nut (2) include casing (21), lead to oil groove (22), annotate oil pipe (23) and go out oil pipe (24), casing (21) cover is established at lead screw (1) middle part, both ends are all turned right from a left side and have evenly been seted up and are led to oil groove (22) about casing (21), it is Y style of calligraphy structure to lead to oil groove (22), lead to oil groove (22) left and right sides opening and all hug closely mutually with the ball, it has annotate oil pipe (23) to lead to oil groove (22) mid-mounting on casing (21) upper end, it has out oil pipe (24) to lead to oil groove (22) mid-mounting that is located casing.

2. A ball screw according to claim 1, wherein: sealing ring (3) include outer sealing washer (31), interior sealing washer (32), fixture block (33) and rubber circle (34), and outer sealing washer (31) are connected with interior sealing washer (32) through the screw, and interior sealing washer (32) are installed on casing (21) lateral wall through the screw, and fixture block (33) are installed to outer sealing washer (31) and interior sealing washer (32) inboard symmetry from top to bottom, and rubber circle (34) sticis between fixture block (33) and outer sealing washer (31) or fixture block (33) that correspond and interior sealing washer (32) that correspond.

3. A ball screw according to claim 1, wherein: oiling pipe (23) are including sealed lid (231), body (232) and separation blade (233), and sealed lid (231) are installed on logical oil groove (22) top through the screw-thread fit mode, and sealed lid (231) lower extreme is connected with body (232) upper end through the joint mode, and body (232) lower extreme is for leaking hopper-shaped structure, and crisscross separation blade (233) of installing about on body (232) inner wall.

4. A ball screw according to claim 1, wherein: the oil outlet pipe (24) is installed in the oil through groove (22) in a threaded matching mode, and a funnel-shaped socket is formed in the upper end of the oil outlet pipe (24).

5. A ball screw according to claim 2, wherein: the clamping block (33) is mounted on the inner wall of the corresponding outer sealing ring (31) or inner sealing ring (32) through a hinge.

6. A ball screw according to claim 1, wherein: and the reverser is embedded and installed on the inner wall of the nut (2).

7. A ball screw according to claim 3, wherein: the top ends of the sealing cover (231) and the oil outlet pipe (24) are provided with straight grooves.