Novel high-load ball type linear guide rail device

Abstract

A novel high-load ball type linear guide rail device is characterized by comprising a linear guide rail, a sliding block and balls, three rows of rolling grooves are formed in the two sides of the linear guide rail respectively and include the upper rolling groove, the middle rolling groove and the lower rolling groove, and three rows of ball grooves are formed in the two sides of a sleeve groove of the sliding block respectively and include the upper rolling groove, the middle rolling groove and the lower rolling groove. Rolling grooves are formed in the linear guide rail and the sliding block, ball grooves are formed in the linear guide rail and correspond to the rolling grooves in a one-to-one mode, the ball grooves are divided into upper ball grooves, middle ball grooves and lower ball grooves, six rows of ball channels are formed in the axial end face of the sliding block, and the ball channels correspond to the ball grooves in a one-to-one mode. The balls in the upper ball groove, the middle ball groove and the lower ball groove can bear lateral loads, lateral static rated loads are improved, the linear guide rail has the performance of high rated loads in the downward pressing direction, the upward pulling direction and the lateral direction, the loading capacity of the linear guide rail device is greatly improved, and the service life of the linear guide rail device is prolonged. And the linear guide rail can still keep high-precision reciprocating linear motion under the condition of great load.

Description

TECHNICAL FIELD

[0001] The utility model relates to abrasive wheel technical field, especially a kind of high load new type ball linear guide device. BACKGROUND

[0002] Linear guide is used to support and guide the reciprocating linear motion of moving parts in the given direction. In the same movement component volume, it has higher rated load and movement accuracy than linear bearing, and can bear certain torque load.

[0003] Linear guide mainly transfers load by ball, and is divided into micro, medium and heavy load type linear guide according to different load. The main difference between micro, medium and heavy load type linear guide is the number of balls. Micro linear guide generally has 2 columns of steel balls, and 4-point contact with track surface, compact structure, medium and heavy load type linear guide generally has 4 columns of steel balls, which improves the carrying capacity. Load capacity is one of the key considerations for linear guide selection. The static rated load that linear guide can bear, the static rated load in the direction of pressing down, pulling up and sideways are the key considerations for linear guide selection. The static rated load that linear guide can bear is positively related to the number of balls and the square of the diameter of the ball. Therefore, the industry often increases the diameter of the ball to improve the rated load capacity of the linear guide. However, the demand for rated load of machinery is increasing, the diameter of the ball increases, and the volume of the linear guide also increases relatively. The manufacturing cost, weight and installation space of the linear guide will increase. Therefore, a high load new type ball linear guide device is needed to solve the above technical problems. SUMMARY

[0004] The utility model aims at solving the technical problem that the industry often increases the diameter of the ball to improve the rated load capacity of the linear guide. However, the demand for rated load of machinery is increasing, the diameter of the ball increases, and the volume of the linear guide also increases relatively. The manufacturing cost, weight and installation space of the linear guide will increase. Therefore, a high load new type ball linear guide device is needed to solve the above technical problems.

[0005] The utility model provides a high load new type ball linear guide rail device, its characterized in be: including linear guide rail, slider and ball, the linear guide rail is the long strip structure of design along X direction extension, the linear guide rail is the structure of axial symmetry, the both sides of linear guide rail are equipped with three columns rolling groove respectively, the rolling groove is divided into upper rolling groove, middle rolling groove and lower rolling groove, the bottom of slider is equipped with sleeve groove, the shape of sleeve groove is matched with linear guide rail, the slider is assembled on linear guide rail through sleeve groove, the both sides of sleeve groove of slider are equipped with three columns ball groove, ball groove and rolling groove one to one correspond mutually, the ball groove is divided into upper ball groove, middle ball groove and lower ball groove, the axial end surface of slider is equipped with six columns ball channel, ball channel and ball groove one to one correspond mutually, ball channel is the ball channel of X direction through slider, ball channel, rolling groove and ball groove form the complete ball circulation channel, the ball is assembled in the ball groove of slider.

[0006] Further, the contact angle of the ball in the upper ball groove is 45°, the contact angle of the ball in the lower ball groove is 45°, and the contact angle of the ball in the middle ball groove is 60°.

[0007] Further, the upper rolling groove corresponds to the upper ball groove, the middle ball groove corresponds to the middle rolling groove, and the lower ball groove corresponds to the lower rolling groove.

[0008] Further, the ball channel has six columns, three of which are distributed on the left side of the axial end surface of the slider, and the other three are distributed on the right side of the axial end surface of the slider.

[0009] Further, the roughness of the rolling groove, the ball channel, and the ball groove is less than 0.3 um.

[0010] Compared with the prior art, the advantages of the utility model include: the linear guide rail device designed with six ball grooves, four of which have a contact angle of 45°, and two of which have a contact angle of 60°, the four balls with a contact angle of 45° bear the bearing pressure, and the two balls with a contact angle of 60° bear the tension, so that the entire linear guide rail device can bear all axial loads and torques, and the entire system has very high load capacity and can still perform high-precision repeated linear motion under high load. By adding two ball grooves to the linear guide rail and the slider, the balls in the upper, middle, and lower ball grooves can bear lateral loads, improving the lateral static load rating and enabling the linear guide rail to have high load capacity in the downward and upward directions and in the lateral direction, greatly improving the load capacity of the linear guide rail device and enabling the linear guide rail to still perform high-precision linear motion under high load. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced.

[0012] Figure 1 is a structure front view of a high-load novel ball-type linear guide rail device provided in the embodiments of the present application,

[0013] Figure 2 is a structure schematic diagram of a linear guide rail in a high-load novel ball-type linear guide rail device provided in the embodiments of the present application,

[0014] Figure 3 is a structure schematic diagram of a slider in a high-load novel ball-type linear guide rail device provided in the embodiments of the present application,

[0015] Figure 4 is a perspective view of a high-load novel ball-type linear guide rail device provided in the embodiments of the present application,

[0016] In the drawings: 1, linear guide rail; 2, slider; 3, ball; 101, rolling groove; 1011, upper rolling groove; 1012, middle rolling groove; 1013, lower rolling groove; 201, sleeve groove; 202, ball groove; 2021, upper ball groove; 2022, middle ball groove; 2023, lower ball groove; 203, ball channel. DETAILED DESCRIPTION

[0017] In view of the deficiencies in the prior art, the present case is obtained through long-term research and a large number of practices, and the technical scheme of the present application is proposed. The technical scheme in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application.

[0018] Figure 1 is a structure front view of a high-load novel ball-type linear guide rail device provided in the embodiments of the present application, Figure 2 is a structure schematic diagram of a linear guide rail in a high-load novel ball-type linear guide rail device provided in the embodiments of the present application, Figure 3 is a structure schematic diagram of a slider in a high-load novel ball-type linear guide rail device provided in the embodiments of the present application, Figure 4 is a perspective view of a high-load novel ball-type linear guide rail device provided in the embodiments of the present application, Figures 1 to 4The application discloses a high-load novel ball-type linear guide rail device, which is characterized by comprising a linear guide rail 1, a sliding block 2 and balls 3. The linear guide rail 1 is a long strip structure designed to extend along the X direction. The linear guide rail 1 is an axisymmetric structure. Three rows of rolling grooves 101 are arranged on the two sides of the linear guide rail 1. The rolling grooves 101 are divided into upper rolling grooves 1011, middle rolling grooves 1012 and lower rolling grooves 1013. The upper rolling grooves have two sides, the lower rolling grooves have two rows, and the middle rolling grooves have two rows. The two rows of upper rolling grooves are designed to be axisymmetric, the two rows of lower rolling grooves are designed to be axisymmetric, and the two rows of middle rolling grooves are designed to be axisymmetric. The rolling grooves on the two sides of the linear guide rail are designed to be axisymmetric to balance the stress on the left and right sides of the linear guide rail, the stress on the two sides is uniform, the appearance is beautiful, the load is stable, the stability of the load and the running precision of the linear guide rail is ensured, the bottom of the sliding block 2 is provided with a sleeve groove 201, the shape of the sleeve groove 201 is matched with the linear guide rail 1, the sliding block 2 is slidably assembled on the linear guide rail 1 through the sleeve groove 201, the two sides of the sleeve groove 201 of the sliding block 2 are provided with three rows of ball grooves 202, the ball grooves 202 are one-to-one corresponding to the rolling grooves 101, the ball grooves 202 are divided into upper ball grooves 2021, middle ball grooves 2022 and lower ball grooves 2023, the upper rolling grooves 1011 are corresponding to the upper ball grooves 2021, the middle ball grooves 2022 are corresponding to the middle rolling grooves 1012, and the lower ball grooves 2023 are corresponding to the lower rolling grooves 1013. The upper ball grooves have two sides, the lower ball grooves have two rows, and the middle ball grooves have two rows. The two rows of upper ball grooves are designed to be axisymmetric, the two rows of lower ball grooves are designed to be axisymmetric, and the two rows of middle ball grooves are designed to be axisymmetric. The ball grooves on the two sides of the sliding block are designed to be axisymmetric, the design balances the stress on the left and right sides of the sliding block, the stress on the two sides is uniform, the appearance is beautiful, the load is stable, the stability of the load and the running precision of the sliding block is ensured, the axial end surface of the sliding block 2 is provided with six rows of ball channels 203, the ball channels 203 are one-to-one corresponding to the ball grooves 202, the ball channels 203 are X-direction ball channels penetrating through the sliding block 2, the ball channels 203, the rolling grooves 101 and the ball grooves 202 form a complete ball circulating channel, the balls repeatedly move back and forth in the ball circulating channel, thereby driving the sliding block to move back and forth on the linear guide rail, completing the high-precision reciprocating linear motion of the linear guide rail, the balls 3 are assembled in the ball grooves 202 of the sliding block 1, the contact angle of the balls 3 in the upper ball grooves 2021 is 45°, the contact angle of the balls 3 in the lower ball grooves 2023 is 45°, the balls in the upper ball grooves and the lower ball grooves bear normal pressure, the contact angle of the balls 3 in the middle ball grooves 2022 is 60°, the balls in the middle ball grooves bear tension, and the balls in the upper ball grooves, the lower ball grooves and the middle ball grooves can all bear lateral force. The linear guide rail device is designed with six rows of ball grooves, four rows of balls bear bearing pressure, two rows of balls bear tension, the whole linear guide rail device can bear all axial loads and torques, and the whole system has extremely high load.In the case of extremely high load, the high-precision reciprocating linear motion can still be repeated.

[0019] Further, the ball channel 203 has six rows, three of which are distributed on the left side of the axial end surface of the slider, and the other three are distributed on the right side of the axial end surface of the slider. The three ball channels on the left side are axially symmetrically designed with the ball channels on the right side, balancing the stress on the left and right sides and ensuring that the load and running accuracy of the slider are not affected.

[0020] Further, the roughness of the rolling groove 101, the ball channel 203 and the ball groove 202 is less than 0.3um. The roughness of the rolling groove, the ball channel and the ball groove is small, the friction of the ball during operation is small, the wear and damage to the guide rail are reduced, thereby prolonging the service life of the guide rail and ensuring the high-precision reciprocating linear motion of the linear guide rail.

[0021] The high-load novel ball-type linear guide rail device provided by the utility model, it should be understood that the above-mentioned embodiments are only for illustrating the technical concept and characteristics of the utility model, the purpose is to let the person skilled in the art understand the content of the utility model and implement it, and it cannot limit the protection scope of the utility model. Any simple change and replacement using the content of the utility model are included in the protection scope of the utility model.

Claims

1. A high-load-capacity novel ball-type linear guide rail device, characterized by: The application relates to a linear guide rail, a sliding block and a ball, wherein the linear guide rail is a long strip structure designed to extend along the X direction, the linear guide rail is an axis-symmetrical structure, three rows of rolling grooves are arranged on the two sides of the linear guide rail, the rolling grooves are divided into upper rolling grooves, middle rolling grooves and lower rolling grooves, a sleeve groove is arranged at the bottom of the sliding block, the shape of the sleeve groove is matched with the linear guide rail, the sliding block is assembled on the linear guide rail through the sleeve groove, three rows of ball grooves are arranged on the two sides of the sleeve groove of the sliding block, the ball grooves and the rolling grooves one-to-one correspond to each other, the ball grooves are divided into upper ball grooves, middle ball grooves and lower ball grooves, six rows of ball channels are arranged on the axial end face of the sliding block, the ball channels and the ball grooves one-to-one correspond to each other, the ball channels are X-direction ball channels penetrating through the sliding block, the ball channels, the rolling grooves and the ball grooves form complete ball circulating channels, and the balls are assembled in the ball grooves of the sliding block.

2. The high-load-capacity novel ball-type linear guide rail device according to claim 1, characterized by: The contact angle of the balls in the upper ball grooves is 45 DEG, the contact angle of the balls in the lower ball grooves is 45 DEG, and the contact angle of the balls in the middle ball grooves is 60 DEG.

3. The high-load-capacity novel ball-type linear guide rail device according to claim 1, characterized by: The upper rolling grooves and the upper ball grooves correspond to each other, the middle ball grooves and the middle rolling grooves correspond to each other, and the lower ball grooves and the lower rolling grooves correspond to each other.

4. The high-load-capacity novel ball-type linear guide rail device according to claim 1, characterized by: The ball channels have six rows, wherein three rows are distributed on the left side of the axial end face of the sliding block, and the other three rows are distributed on the right side of the axial end face of the sliding block.

5. The high-load-capacity novel ball-type linear guide rail device according to claim 1, characterized by: The roughness of the rolling grooves, the ball channels and the ball grooves is less than 0.3 um.

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