CN111673483A - A guide rail embedded linear transmission component and electric sliding table - Google Patents

Abstract

The invention discloses a linear transmission part with an embedded guide rail and an electric sliding table. The electric sliding table structure greatly reduces the volume, and saves the installation space under the same load capacity. Because the steel ball rolling groove adopts integrated grinding processing, the straightness accuracy and the walking depth of parallelism of linear guide have been improved, outside oiling and inside oil storage device let electronic slip table have the function of long-time exempting from lubrication, have improved the life of electronic slip table, through the totally enclosed packaging structure, prevent that inside grease from spilling over and having prevented outside foreign matter to get into moving parts such as lead screw and guide rail simultaneously, also can be used for having the dustproofness level dustless environment and use.

Description

A guide rail embedded linear transmission component and electric sliding table

technical field

The invention relates to the technical field of precision linear transmission, in particular to a linear transmission component embedded in a guide rail and an electric sliding table.

Background technique

Electric slides are linear actuators driven by servo or stepper motors. Modular electric slides have become indispensable motion execution units in automation applications. Electric slides are commonly known as linear modules, electric actuators, linear motion units, servo slides, electric cylinders, etc.

In the prior art, the guide part of the electric sliding table is generally assembled on the base by using a standard linear guide rail, and then assembled by a ball screw, a bearing seat, and a servo motor. By controlling the rotation of the motor, the positioning of the electric sliding table slide is realized. The disadvantage is that the integration is low, there are many assembly parts, the size is too large, and the cumulative error is large. The application is limited in many high-precision and high-integration devices.

Therefore, how to realize the miniaturization and integration of the electric slide table and improve the accuracy of the electric slide table has always been a problem faced in automation applications.

SUMMARY OF THE INVENTION

Based on the technical problems of the prior art electric slide table body being bulky, low integration, large external dimensions and large precision error, the present invention proposes a guide rail embedded linear transmission component and an electric slide table.

The present invention provides a guide rail-embedded linear transmission component, which includes a base, and a sliding seat is installed in the base. Notches are provided on both inner walls of the base and on both sides of the sliding seat. The base embedded guide rail and the sliding seat embedded guide rail are respectively embedded and installed in the mouth, and the base embedded guide rail and the sliding seat embedded guide rail are both provided with a first steel ball rolling groove and a second steel ball rolling groove. Steel balls are installed between the first steel ball rolling groove and the second steel ball rolling groove, and return devices are installed on both ends of the sliding seat, and the steel balls are adapted to the return devices.

Preferably, the base is made of aluminum profiles, and the cross-sectional shape of the base is a U-shaped structure.

Preferably, the base embedded guide rail and the sliding seat embedded guide rail are both wear-resistant and high-hardness steels.

Preferably, a sliding seat guard is installed on the top of the base, a dust-proof steel belt is installed on the sliding seat guard, an adsorption magnetic strip is installed on the dust-proof steel belt, and magnet blocks are installed on the steel belts at both ends of the sliding seat, and The magnet block is adapted to the adsorption magnetic strip.

Preferably, a ball screw nut is installed on the sliding seat, and the ball screw nut has a flangeless nut structure and is installed on the sliding seat by a pin, and a ball screw is installed on the inner thread of the ball screw nut.

Preferably, the sliding seat is provided with an oil filling inlet, the ball screw is sleeved with an oil storage ring located in the sliding seat, the oil storage ring is made of fiber material with oil absorption function, and one side of the ball screw nut is installed with an oil storage ring. The baffle plate and the sliding seat are provided with oil filling passages, and the oil filling passages are respectively connected with the oil storage ring and the oil filling inlet.

Preferably, one end of the ball screw extends to the outside of the base, and an end cover is rotatably installed, the end cover is fixedly installed on the base, and the other end of the ball screw extends out of the base, and a coupling is fixedly installed. The end of the shaft away from the ball screw is fixedly installed with the output shaft of the servo motor.

Preferably, a fixed seat is movably sleeved on the coupling, a coupling sleeve is fixedly sleeved on the fixed seat, and a bearing seat is fixedly installed on one side of the fixed seat, the bearing seat is fixedly installed on the base, and the servo motor It is fixedly installed on the fixed seat.

Preferably, side covers are fixedly installed on both sides of the base, and photoelectric sensors, bearing seats, couplings, servo motors, side covers, dust-proof steel belts, and magnet blocks are fixedly installed on the side covers to form an electric sliding table .

An electric sliding table, comprising the linear transmission component described in any one of the above.

In the present invention, compared with the prior art, the linear transmission component and the electric sliding table embedded in the guide rail have the beneficial effects that the structure of the electric sliding table described in the present application is greatly reduced in volume. , Under the same load capacity, it saves more installation space. As the rolling groove of the steel ball is processed by one-piece grinding, the straightness and running parallelism of the linear guide are improved. The external oil filling and internal oil storage device make the electric sliding table have a long-term lubrication-free function and improve the service life of the electric sliding table. Through the fully sealed package structure, the internal grease is prevented from overflowing and the external foreign matter is prevented from entering the moving parts such as the screw and the guide rail, and it can also be used in a dust-free environment with a dust-proof level.

Description of drawings

Figure 1 is a cross-sectional view of an embedded guide rail structure;

Fig. 2 is the schematic diagram of the groove structure of the Gothic guide rail with two-point contact;

Fig. 3 is the trajectory diagram of the embedded track steel ball;

Figure 4 is a structural diagram of oil injection passage and oil storage;

Figure 5 is the outline structure diagram of the guide rail embedded electric sliding table;

Figure 6 is an exploded structural diagram of the guide rail embedded electric slide table.

In the picture: 1- base, 2- slide, 3- base embedded guide, 4- slide embedded guide, 5- steel ball, 6- return hole, 7- return device, 8- ball screw nut, 9 -End cover, 10-side cover, 11-bearing seat, 12-coupling cover, 13-servo motor, 14-dustproof steel belt, 15-photoelectric sensor, 16-fixed seat, 17-magnet block, 18- Ball screw, 19-slide guard, 20-coupling, 21-oil storage ring, 22-block, 23-oil inlet, 24-oil passage, 25-pin.

Detailed ways

The technical solutions in 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

Example 1

Referring to Figures 1-5, a guide rail embedded linear transmission component includes a base 1, a sliding seat 2 is installed in the base 1, and notches are provided on the inner walls of both sides of the base 1 and on both sides of the sliding seat 2, The base embedded guide rail 3 and the sliding seat embedded guide rail 4 are embedded and installed in the two notches respectively. The base embedded guide rail 3 and the sliding seat embedded guide rail 4 are both provided with a first steel ball rolling groove and a second steel ball rolling groove. Grooves, steel balls are installed between the first steel ball rolling groove and the second steel ball rolling groove to form two circulating rolling systems, the size of the first steel ball rolling groove and the second steel ball rolling groove, It forms a Gothic two-point contact structure with the designated steel ball. Both ends of the sliding seat 2 are rollingly installed with a return device 7. The steel ball is adapted to the return device 7, and the return device 7 is processed by the injection molding process. Rail return.

In the present invention, the base 1 is made of aluminum profiles, and the cross-sectional shape of the base 1 is a U-shaped structure. The base 1 obtains an aluminum base with a desired cross-sectional shape through a metal extrusion process.

In the present invention, the base embedded guide rails 3 and the sliding seat embedded guide rails 4 are both wear-resistant and high-hardness steels, and the base embedded guide rails 3 and the sliding seat embedded guide rails 4 obtain the guide rail blanks with the required cross-sectional shape through the cold drawing process. And the hardness of the guide rail is made to HRC57-62 through heat treatment, and the deformation and twist of the guide rail after heat treatment are less than 0.2mm/m.

In the present invention, a sliding seat cover 19 is installed on the top of the base 1, a dust-proof steel belt 14 is installed on the sliding seat cover 19, an adsorption magnetic strip is installed on the dust-proof steel belt 14, and the steel belts at both ends of the sliding seat 2 are installed There is a magnet block 17, and the magnet block 17 is adapted to the adsorption magnetic strip.

In the present invention, a ball screw nut 8 is installed on the sliding seat 2, and the ball screw nut 8 is a flangeless nut structure, and is installed on the sliding seat 2 by a pin 25, and a ball screw is installed on the inner thread of the ball screw nut 8 Bar 18.

In the present invention, the sliding seat 2 is provided with an oil filling inlet 23, the ball screw 18 is sleeved with an oil storage ring 21 located in the sliding seat 2, the oil storage ring 21 is made of fiber material with oil absorption function, and the ball screw nut A baffle 22 is installed on one side of the 8, and an oil filling passage 24 is provided on the sliding seat 2, and the oil filling passage 24 is respectively connected with the oil storage ring 21 and the oil filling inlet 23, and the grease is delivered to the oil storage ring through the external oil filling hole, Ball screw and linear guide oil inlets.

In the present invention, one end of the ball screw 18 extends to the outside of the base 1, and the end cover 9 is rotatably installed, the end cover 9 is fixedly installed on the base 1, and the other end of the ball screw 18 extends to the outside of the base 1, and is fixedly installed There is a coupling 20 , and one end of the coupling 20 away from the ball screw 18 is fixedly mounted with the output shaft of the servo motor 13 .

In the present invention, the fixed seat 16 is movably sleeved on the coupling 20, the coupling sleeve 12 is fixedly sleeved on the fixed seat 16, and the bearing seat 11 is fixedly installed on one side of the fixed seat 16, and the bearing seat 11 is fixed Installed on the base 1 , the servo motor 13 is fixedly installed on the fixing base 16 .

In the present invention, side covers 10 are fixedly installed on both sides of the base 1 , and photoelectric sensors 15 , bearing seats 11 , couplings 20 , servo motors 13 , side covers 10 , and dust-proof steel belts 14 are fixedly installed on the side covers 10 . , the magnet block 17 constitutes an electric sliding table.

Embodiment 2

Referring to Figures 1-5, a guide rail embedded linear transmission component includes a base 1, a sliding seat 2 is installed in the base 1, and notches are provided on the inner walls of both sides of the base 1 and on both sides of the sliding seat 2, The slot is a square slot with a C-shaped structure. The base embedded guide rail 3 and the sliding seat embedded guide rail 4 are embedded in the two slots respectively. The base embedded guide rail 3 and the sliding seat embedded guide rail 4 are both provided with a first steel The ball rolling groove and the second steel ball rolling groove, the first steel ball rolling groove and the second steel ball rolling groove are obtained by rough grinding, fine grinding and super fine grinding, and their smoothness is above Ra0.8μm , and adopts a 2-column Gothic groove structure. The steel balls in the rolling grooves are in 2-point contact with the base groove and the sliding seat groove, respectively, and the four contact points are 45-degree angular contact, which can withstand each A steel ball is installed between the first steel ball rolling groove and the second steel ball rolling groove, and a return device 7 is rollingly installed on both ends of the sliding seat 2. The steel ball and the return device 7 Matching, the return device 7 installed at both ends of the sliding seat 2 has high wear resistance, the sliding seat 2 is designed with a steel ball return hole, the return device 7 is designed with a steel ball reverse raceway, and the return device rolls. The track is smoothly connected to the steel ball rolling groove of the slide 2, which can smoothly guide the steel ball into the steel ball return hole of the slide 2. The steel ball forms a circulation system in the return device 7 at both ends, and the steel ball returns to The function of the device 7 is: the first steel ball rolling groove of the base 1 and the second steel ball rolling groove of the sliding seat 2 are filled with precision steel balls with high hardness and high wear resistance. During the relative movement, the steel balls roll synchronously. At the front end of the sliding seat 2, after the steel ball enters the return device 7, it enters the return hole of the sliding seat 2 along the steel ball channel of the return device 7, and the steel ball passes through the return hole from the other side. The return device 7 at one end enters the rolling groove surface of the steel ball again, so as to realize the cyclic movement again and again.

In the present invention, the base 1 is made of aluminum profiles, and the cross-sectional shape of the base 1 is a U-shaped structure.

In the present invention, the base embedded guide rail 3 and the sliding seat embedded guide rail 4 are both wear-resistant and high-hardness steels.

In the present invention, a sliding seat cover 19 is installed on the top of the base 1, a dust-proof steel belt 14 is installed on the sliding seat cover 19, an adsorption magnetic strip is installed on the dust-proof steel belt 14, and the steel belts at both ends of the sliding seat 2 are installed There is a magnet block 17, and the magnet block 17 is adapted to the adsorption magnetic strip.

In the present invention, a ball screw nut 8 is installed on the sliding seat 2, and the ball screw nut 8 is a flangeless nut structure, and is installed on the sliding seat 2 by a pin 25, and a ball screw is installed on the inner thread of the ball screw nut 8 Bar 18.

In the present invention, the sliding seat 2 is provided with an oil filling inlet 23, the ball screw 18 is sleeved with an oil storage ring 21 located in the sliding seat 2, the oil storage ring 21 is made of fiber material with oil absorption function, and the ball screw nut A baffle 22 is installed on one side of the 8, and an oil filling passage 24 is provided on the sliding seat 2, and the oil filling passage 24 is communicated with the oil storage ring 21 and the oil filling inlet 23 respectively.

In the present invention, one end of the ball screw 18 extends to the outside of the base 1, and the end cover 9 is rotatably installed, the end cover 9 is fixedly installed on the base 1, and the other end of the ball screw 18 extends to the outside of the base 1, and is fixedly installed There is a coupling 20 , and one end of the coupling 20 away from the ball screw 18 is fixedly mounted with the output shaft of the servo motor 13 .

In the present invention, the fixed seat 16 is movably sleeved on the coupling 20, the coupling sleeve 12 is fixedly sleeved on the fixed seat 16, and the bearing seat 11 is fixedly installed on one side of the fixed seat 16, and the bearing seat 11 is fixedly installed On the base 1 , the servo motor 13 is fixedly mounted on the fixing base 16 .

In the present invention, side covers 10 are fixedly installed on both sides of the base 1 , and photoelectric sensors 15 , bearing seats 11 , couplings 20 , servo motors 13 , side covers 10 , and dust-proof steel belts 14 are fixedly installed on the side covers 10 . , the magnet block 17 constitutes an electric sliding table, the side cover 10 is to prevent the grease from splashing out when the grease moves at a high speed and to prevent external foreign objects from entering the rolling parts.

An electric sliding table, comprising the linear transmission component described in any one of the above.

In the present invention, the rolling groove of the steel ball is obtained through rough grinding, fine grinding and ultra-fine grinding, and the smoothness thereof reaches Ra0.8 μm or more. Referring to Figure 2, the ball groove of the steel ball adopts a 2-row Gothic groove structure. For 45 degree angular contact, it can bear the force in all directions. Referring to Figure 3, a certain number of high-hardness steel balls 5 are installed in the two steel ball rolling grooves of the body base 1 and the sliding seat 2, and steel ball returners 7 are installed at both ends of the sliding seat 2. The sliding seat 2. When the body base 1 is relatively moved, the steel ball 5 rolls synchronously, the steel ball 5 enters the connection port of the return device 7, and enters the return hole 6 of the sliding seat 3 through the steel ball guide groove, and the steel ball 5 is in the sliding seat. The other end of 3 enters the reversing device on the other side, and then enters the rolling groove of the steel ball after the reversing device, and the stroke is one movement cycle. As shown in Figure 3, when the carriage moves to the right, the steel balls in row A roll counterclockwise, and the steel balls in row B roll clockwise. The steel ball enters the rolling groove from point A1 or B1, from the unloaded state to the loaded state, and from the loaded state to the unloaded state at A2 or B2. The steel ball is squeezed by the groove surface of the embedded guide rail and the groove surface of the sliding seat in the A1~A2 section or B1~B2. It can be seen from the above motion process that the steel ball rolls on the groove surface.

Claims (10)

1. A linear transmission component embedded in a guide rail, comprising a base (1), characterized in that a sliding seat (2) is installed in the base (1), and inner walls on both sides of the base (1) are Both sides of the sliding seat (2) are provided with notches, the two notches are respectively embedded with a base embedded guide rail (3) and a sliding seat embedded guide rail (4). A first steel ball rolling groove and a second steel ball rolling groove are provided in the sliding seat embedded guide rails (4), and steel balls are installed between the first steel ball rolling groove and the second steel ball rolling groove A return device (7) is rolled and installed on both ends of the sliding seat (2), and the steel ball is adapted to the return device (7). 2 . The guide rail embedded linear transmission component according to claim 1 , wherein the base ( 1 ) is made of aluminum profiles, and the cross-sectional shape of the base ( 1 ) is a U-shaped structure. 3 . 3. A guide rail-embedded linear transmission component according to claim 1, wherein the base embedded guide rail (3) and the sliding seat embedded guide rail (4) are both wear-resistant and high-hardness steels. 4. A guide rail-embedded linear transmission component according to claim 1, characterized in that a sliding seat cover (19) is installed on the top of the base (1), and a sliding seat cover (19) is installed on the top There is a dust-proof steel belt (14), an adsorption magnetic strip is installed on the dust-proof steel belt (14), a magnet block (17) is installed on the steel belts at both ends of the sliding seat (2), and the magnet block (17) is connected with the adsorption magnetic strip. strips fit. 5. A guide rail embedded linear transmission component according to claim 1, wherein a ball screw nut (8) is installed on the sliding seat (2), and the ball screw nut (8) In order to have no flange nut structure, a pin (25) is used to install on the sliding seat (2), and a ball screw (18) is installed on the inner thread of the ball screw nut (8). 6. A guide rail-embedded linear transmission component according to claim 1, wherein the sliding seat (2) is provided with an oil filling inlet (23), and the ball screw (18) is sleeved with an oil inlet (23). An oil storage ring (21) located in the sliding seat (2), the oil storage ring (21) is made of fiber material with oil absorption function, a baffle plate (22) is installed on one side of the ball screw nut (8), and the sliding seat (2) An oil filling passage (24) is provided on the upper part, and the oil filling passage (24) is respectively communicated with the oil storage ring (21) and the oil filling inlet (23). 7. A guide rail embedded linear transmission component according to claim 5, wherein one end of the ball screw (18) extends to the outside of the base (1), and an end cover (9) is rotatably installed ), the end cover (9) is fixedly installed on the base (1), the other end of the ball screw (18) extends to the outside of the base (1), and the coupling (20) is fixedly installed, and the coupling (20) The output shaft of the servo motor (13) is fixedly installed at one end away from the ball screw (18). 8. A guide rail-embedded linear transmission component according to claim 1, wherein a fixed seat (16) is movably sleeved on the coupling (20), and the fixed seat (16) is fixed on the A coupling sleeve (12) is sleeved, and a bearing seat (11) is fixedly installed on one side of the fixed seat (16), the bearing seat (11) is fixedly installed on the base (1), and the servo motor (13) is fixedly installed on the holder (16). 9 . A guide rail embedded linear transmission component according to claim 1 , wherein a side cover ( 10 ) is fixedly installed on both sides of the base ( 1 ), and the side cover ( 10 ) is fixed on the side cover ( 10 ). 10 . The photoelectric sensor (15), the bearing seat (11), the coupling (20), the servo motor (13), the side cover (10), the dust-proof steel belt (14), and the magnet block (17) are installed to form an electric sliding tower. 10 . The electric sliding table according to claim 1 , wherein, it comprises the linear transmission component according to any one of claims 1 to 9 . 11 .

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