A bearing support device for a ball screw

Abstract

The present invention provides a bearing support device for a ball screw, the bearing support device comprises a support seat, a support bearing and a clamping device, the support seat and the support bearing are both sleeved on the outer side of the support end of the ball screw; the support seat comprises two symmetrically arranged support shells, each support shell comprises a support tube and a mounting ear arranged on the support tube, the inner wall of the support tube is also provided with a first step hole and a second step hole, the two support shells are each provided with a support bearing, and the support bearing is provided with two countersunk holes for installing a sealing ring; a clamping device is also provided between the two supporting bearings; the clamping device comprises a spring and two clamping members symmetrically arranged at both ends of the spring, each clamping member comprises a pressing plate and a sliding plate vertically arranged at one end of the pressing plate. The present invention provides a more fitted arrangement of the support bearing in the support seat of the ball screw bearing support device, and the structure of the bearing support device is simple and easy to install.

Description

Technical Field

[0001] The invention relates to a bearing support device for a ball screw. Background Art

[0002] Ball screw is a tool that converts rotary motion into linear motion, or linear motion into rotary motion. It is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or torque into axial repetitive force. It has the characteristics of high precision, reversibility and high efficiency. Ball screw has been widely used in various industrial equipment. There are three ways to install ball screws. The first is a fixed end and free end installation method, which is suitable for low speed and short ball screw. The second is a floating installation method at both ends, which is suitable for medium speed ball screws. The third installation method is fixed at one end and floating at the other end, which is suitable for medium speed and high precision operation. Among these three methods, the fixed installation method and the floating installation method of the ball screw are both installed by matching bearings and support devices. Among them, the fixed installation method will also be provided with a stop ring and other devices for stopping. The bearing (support bearing) is arranged in the support device (support seat), and the support bearing needs to be fixed in the support seat, which requires high precision of the support seat. The installation of the bearing support device is cumbersome and the maintenance efficiency is low. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a bearing support device for a ball screw. Through the arrangement of a support seat, a support bearing and a clamping device, the support bearing in the ball screw bearing support device is more closely arranged in the support seat. The bearing support device has a simple structure and is easy to install.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A bearing support device for a ball screw, the bearing support device is arranged at the support end of the ball screw, and is characterized in that: the bearing support device includes a support seat, a support bearing and a clamping device, the support seat and the support bearing are both sleeved on the outside of the support end of the ball screw; the support seat includes two symmetrically arranged support shells, each support shell includes a support tube and a mounting ear arranged on the support tube, the support tube includes a closed end and an open end, the closed end of the support tube is reserved for a through hole I for the support end of the ball screw to pass through, the outer side of the open end of the support tube is provided with a mounting ear, the mounting ear is provided with a mounting hole, the inner wall of the support tube is also provided with a first step hole and a second step hole, the first step hole is provided at the closed end of the support tube, the second step hole is provided at the open end of the support tube, the aperture of the second step hole is larger than the aperture of the first step hole, and both support shells are provided with The support bearing, one end of the support bearing is arranged in the hole of the first step hole, and a sliding gap is reserved between the other end of the support bearing and the second step hole; the support bearing includes an inner ring, an outer ring and a rolling body, the inner ring is arranged inside the outer ring, a rolling gap is reserved between the inner ring and the outer ring, the rolling body is arranged in the rolling gap, and two countersunk holes for sealing ring installation are respectively provided at both ends of the rolling gap; a clamping device is also provided between the two support bearings; the clamping device includes a spring and two clamping members symmetrically arranged at both ends of the spring, each clamping member includes a pressing plate and a sliding plate vertically arranged at one end of the pressing plate, the pressing plate is disc-shaped, and a through hole II for the ball screw to pass through is also provided on the pressing plate, the sliding plate is cylindrical with openings at both ends, one end of the sliding plate is arranged in the sliding gap, and the other end of the sliding plate is connected to the pressing plate.

[0006] Furthermore, the number of the mounting ears is more than two.

[0007] Furthermore, the two supporting shells are fixed by bolts and nuts matching the bolts, and the bolts are arranged in the mounting holes.

[0008] Furthermore, the countersink is a conical countersink.

[0009] Furthermore, a retaining frame is provided between the outer ring and the inner ring, and the rolling body is arranged in a hole of the retaining frame.

[0010] Furthermore, the retaining frame is a nylon retaining frame.

[0011] Furthermore, the sealing ring is a polytetrafluoroethylene sealing tape.

[0012] Furthermore, the support bearing is an angular contact ball bearing, and the contact angle of the angular contact ball bearing is 60°.

[0013] The beneficial effects of the present invention are:

[0014] 1. A bearing support device for a ball screw of the present invention, through the arrangement of a support seat, a support bearing and a clamping device, makes the support bearing fit more closely to the two ends of the support seat, and the support bearing is fixed more stably;

[0015] 2. A bearing support device for a ball screw of the present invention, wherein the support bearing and the clamping device are conveniently installed in the support seat, and the support seat is fixed by the outer mounting ears, which is convenient for installation and disassembly, and is convenient for maintenance and replacement;

[0016] 3. Conical countersunk holes for installing sealing rings are respectively provided on the two sides of the support bearing. The sealing rings are arranged in the conical countersunk holes to seal the support bearing, prevent the leakage of lubricating grease of the support bearing and the entry of dust, and will not increase the friction of the support bearing caused by the sealing ring.

[0017] 4. The installation method of the support bearing is flexible and changeable. The support bearing is an angular contact ball bearing, which can bear radial load and axial load at the same time. The two support bearings can be arranged in the same axial direction or in opposite axial directions, so that the bearing support device can withstand a larger axial displacement load in the same axial direction or withstand axial displacement loads in two opposite directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the support seat;

[0020] Figure 3 It is a schematic diagram of the structure of the clamping device.

[0021] Among them, the numbers in the figure are: 1, support cylinder; 101, closed end; 102, open end; 2, mounting ear; 3, through hole I; 4, mounting hole; 5, first step hole; 6, second step hole; 7, sliding gap; 8, inner ring; 9, outer ring; 10, rolling body; 11, rolling gap; 12, spring; 13, pressing plate; 14, sliding plate; 15, through hole II; 16, ball screw support end; 17, retaining frame. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] Figure 1 The figure is a structural schematic diagram of a bearing support device for a ball screw, wherein the bearing support device is arranged at the support end of the ball screw, and the bearing support device comprises a support seat, a support bearing and a clamping device, wherein the support seat and the support bearing are both sleeved on the outer side of the support end 16 of the ball screw; the support seat comprises two support shells arranged symmetrically, Figure 2 Schematic diagram of the structure of the support shell, each support shell includes a support tube 1 and a mounting ear 2 arranged on the support tube 1, the support tube 1 includes a closed end 101 and an open end 102, the closed end 101 of the support tube 1 is reserved for a through hole Ⅰ3 for the ball screw support end 16 to pass through, the outer side of the open end 102 of the support tube 1 is provided with a mounting ear 2, the mounting ear 2 is provided with a mounting hole 4, the inner wall of the support tube 1 is also provided with a first step hole 5 and a second step hole 6, the first step hole 5 is arranged at the closed end 101 of the support tube 1, the second step hole 6 is arranged at the open end 102 of the support tube 1, the aperture of the second step hole 6 is larger than the aperture of the first step hole 5, the two support A support bearing is provided in the device, one end of the support bearing is arranged in the hole of the first step hole 5, and a sliding gap 7 is reserved between the other end of the support bearing and the second step hole 6; the two support shells are fixed by bolts and nuts matching the bolts, the bolts are arranged in the mounting holes 4, and the two symmetrical support shells of the support seat are enclosed to form a space for installing the support bearing and the clamping device, wherein the first step hole and the second step hole in the support shell divide the installation space of the support bearing and the clamping device, and the support bearing and the clamping device are easy to install in the support seat, and the support seat is fixed by the outer mounting ear 2, which is easy to install and disassemble, and convenient for maintenance and replacement.

[0025] The support bearing comprises an inner ring 8, an outer ring 9 and rolling elements 10. The inner ring 8 is arranged inside the outer ring 9. A rolling gap 11 is left between the inner ring 8 and the outer ring 9. The rolling element 10 is arranged in the rolling gap 11. Two countersunk holes for installing sealing rings are respectively arranged at both ends of the rolling gap 11. Conical countersunk holes for installing sealing rings are respectively arranged on the two sides of the support bearing. The sealing rings are arranged in the conical countersunk holes to seal the support bearing to prevent the leakage of lubricating grease of the support bearing and the entry of dust. The friction of the polytetrafluoroethylene sealing tape is small, and will not increase the friction of the support bearing caused by the sealing ring too much, and is easy to install and replace the sealing tape.

[0026] A clamping device is also provided between the two supporting bearings; the clamping device includes a spring 12 and two clamping members symmetrically arranged at both ends of the spring 12, each clamping member includes a pressing plate 13 and a sliding plate 14 vertically arranged at one end of the pressing plate 13, the pressing plate 13 is disc-shaped, and the pressing plate 13 is also provided with a through hole II 15 for the ball screw to pass through, the sliding plate 14 is cylindrical with openings at both ends, one end of the sliding plate 14 is arranged in the sliding gap 7, and the other end of the sliding plate 14 is connected to the pressing plate 13; multiple groups of springs 12 are arranged between the two clamping members of the clamping device, and the distance between the two clamping members when the spring 12 is not subjected to external force is greater than the distance between the two supporting bearings in the bearing support device after the bearing support device is installed. During the installation of the bearing support device, a support housing is first installed on the ball screw support end 16, and then the support housing is installed. The support bearing is installed in the first step hole 5 in the support shell, and then the clamping device is installed. The sliding plate of the clamping device is set in the reserved sliding gap 7 between the installed support bearing and the second step hole 6. After the installation is completed, the second support bearing is installed on the ball screw support end 16, and finally the second support shell is installed; because the distance between the two clamping members is greater than the distance between the two support bearings in the bearing support device after the bearing support device is installed, the spring 12 in the clamping device is squeezed during the encirclement of the first support shell and the second support shell, and then the two clamping members at both ends of the clamping device generate a reaction force on the two support bearings at both ends. The two support bearings are tightly attached to the end faces of the two support shells in the support seat under the elastic force of the spring 12, and the fixation of the support bearing is relatively stable, and it is also convenient for the installation of the bearing support device.

[0027] There are more than two mounting ears 2 on the support shell to ensure the stability of the support shell. The support tube 1 is also provided with a plurality of bolt holes for easy installation on the mounting platform of the ball screw. The two support shells of the support seat are fixed by bolts and nuts matching the bolts. The bolts are arranged in the mounting holes 4 for easy installation and disassembly of the support seat. A retaining frame 17 is also provided between the outer ring 9 and the inner ring 8 of the supporting bearing, and the rolling body 10 is arranged in the hole of the retaining frame 17. A nylon retaining frame is selected as the retaining frame, which is lightweight and not easy to cause mechanical damage.

[0028] The supporting bearing is an angular contact ball bearing with a contact angle of 60°. The inner ring 8, outer ring 9 and rolling element 10 of the supporting bearing are made of pure steel workpieces. During the heat treatment process, a carbonitriding process is used to simultaneously infiltrate carbon and nitrogen into the surface of the steel workpiece to ensure the rigidity of the supporting bearing and extend its service life. At the same time, the angular contact ball bearing can withstand radial loads and axial loads. At the same time, the installation method of the supporting bearing is flexible and changeable. The two supporting bearings can be arranged in the same axial direction or in opposite axial directions, so that the bearing support device can withstand a larger axial displacement load in the same axial direction or withstand axial displacement loads in two opposite directions.

[0029] Example 2

[0030] The bearing support device is arranged at the support end of the ball screw, and the bearing support device includes a support seat, a support bearing and a clamping device. The support seat and the support bearing are both sleeved on the outside of the ball screw support end 16; the support seat includes two symmetrically arranged support shells, each of which includes a support tube 1 and a mounting ear 2 arranged on the support tube 1, and the support tube 1 includes a closed end 101 and an open end 102. The closed end 101 of the support tube 1 is reserved for a through hole Ⅰ3 for the ball screw support end 16 to pass through, and a mounting ear 2 is provided on the outside of the open end 102 of the support tube 1, and a mounting hole 4 is provided on the mounting ear 2. The inner wall of the support tube 1 is also provided with a first step hole 5 and a second step hole 6, the first step hole 5 is arranged at the closed end 101 of the support tube 1, and the second step hole 6 is arranged at the open end 102 of the support tube 1, and the aperture of the second step hole 6 is larger than the aperture of the first step hole 5.

[0031] A support bearing is arranged in the first step hole 5 of one of the support shells, and no support bearing is arranged in the other support shell. One end of the support bearing is arranged in the hole of the first step hole 5, and a sliding gap 7 is reserved between the other end of the support bearing and the second step hole 6; the two support shells are fixed by bolts and nuts matching the bolts, and the bolts are arranged in the mounting holes 4. The two symmetrical support shells of the support seat enclose a space for installing the support bearing and the clamping device, wherein the first step hole 5 and the second step hole 6 in the support shell divide the installation space of the support bearing and the clamping device, and the support bearing and the clamping device are easy to install in the support seat. The support seat is fixed by the outer mounting ear 2, and the installation and disassembly are convenient, and it is convenient for maintenance and replacement.

[0032] The support bearing comprises an inner ring 8, an outer ring 9 and rolling elements 10. The inner ring 8 is arranged inside the outer ring 9. A rolling gap 11 is left between the inner ring 8 and the outer ring 9. The rolling element 10 is arranged in the rolling gap 11. Two countersunk holes for installing sealing rings are respectively arranged at both ends of the rolling gap 11. Conical countersunk holes for installing sealing rings are respectively arranged on the two sides of the support bearing. The sealing rings are arranged in the conical countersunk holes to seal the support bearing to prevent the leakage of lubricating grease of the support bearing and the entry of dust. The friction of the polytetrafluoroethylene sealing tape is small, and will not increase the friction of the support bearing caused by the sealing ring too much, and is easy to install and replace the sealing tape.

[0033] A clamping device is also provided between the support bearing and another support shell; the clamping device includes a spring 12 and two clamping members symmetrically arranged at both ends of the spring 12, each clamping member includes a pressing plate 13 and a sliding plate 14 vertically arranged at one end of the pressing plate 13, the pressing plate 13 is disc-shaped, and the pressing plate 13 is also provided with a through hole II 15 for the ball screw to pass through, the sliding plate 14 is a cylindrical shape with openings at both ends, one end of the sliding plate 14 is arranged in the sliding gap 7, and the other end of the sliding plate 14 is connected to the pressing plate 13; multiple groups of springs 12 are arranged between the two clamping members of the clamping device, and the distance between the two clamping members when the spring 12 is not subjected to external force is greater than the distance between the two support bearings in the bearing support device after the bearing support device is installed. During the installation of the bearing support device, a support shell is first installed It is installed on the ball screw support end 16, and then the support bearing is installed in the first step hole 5 in the support shell, and then the clamping device is installed. The sliding plate of the clamping device is set in the reserved sliding gap 7 between the installed support bearing and the second step hole 6, and finally the second support shell is installed; because the distance between the two clamping members is greater than the distance from the support bearing in the bearing support device to the closed end of the other support shell after the bearing support device is installed, the spring 12 in the clamping device is squeezed during the encirclement of the two support shells, and then the two clamping members at both ends of the clamping device generate a reaction force on the support bearing and the closed end of the other support shell, and the support bearing is tightly attached to the end face of the support shell where the support bearing is located under the elastic force of the spring 12, so that the fixation of the support bearing is relatively stable, and it is also convenient for the installation of the bearing support device.

[0034] There are more than two mounting ears 2 on the support shell to ensure the stability of the support shell. The support tube 1 is also provided with a plurality of bolt holes for easy installation on the mounting platform of the ball screw. The two support shells of the support seat are fixed by bolts and nuts matching the bolts. The bolts are arranged in the mounting holes 4 for easy installation and disassembly of the support seat. A retaining frame 17 is also provided between the outer ring 9 and the inner ring 8 of the supporting bearing, and the rolling body 10 is arranged in the hole of the retaining frame 17. A nylon retaining frame is selected as the retaining frame, which is lightweight and not easy to cause mechanical damage.

[0035] The supporting bearing is an angular contact ball bearing with a contact angle of 60°. The inner ring 8, outer ring 9 and rolling element 10 of the supporting bearing are made of pure steel workpieces. During the heat treatment process, a carbonitriding process is used to simultaneously infiltrate carbon and nitrogen into the surface of the steel parts, thereby ensuring the rigidity of the supporting bearing and extending its service life. The angular contact ball bearing can withstand radial loads and axial loads. At the same time, the installation method of the supporting bearing is flexible and can be installed in any supporting housing.

[0036] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0038] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bearing support device for a ball screw, the bearing support device being arranged at a supporting end of the ball screw, characterized in that: The bearing support device comprises a support seat, a support bearing and a clamping device, the support seat and the support bearing are both sleeved on the outer side of the support end of the ball screw; the support seat comprises two symmetrically arranged support shells, each support shell comprises a support tube and a mounting ear arranged on the support tube, the support tube comprises a closed end and an open end, the closed end of the support tube is reserved with a through hole I for the support end of the ball screw to pass through, the outer side of the open end of the support tube is provided with a mounting ear, the mounting ear is provided with a mounting hole, the inner wall of the support tube is also provided with a first step hole and a second step hole, the first step hole is arranged at the closed end of the support tube, the second step hole is arranged at the open end of the support tube, the aperture of the second step hole is larger than the aperture of the first step hole, the support bearings are arranged in the two support shells, one end of the support bearing is arranged in the hole of the first step hole, and a sliding gap is reserved between the other end of the support bearing and the second step hole; The support bearing comprises an inner ring, an outer ring and a rolling body, wherein the inner ring is arranged inside the outer ring, a rolling gap is left between the inner ring and the outer ring, the rolling body is arranged in the rolling gap, and two countersunk holes for installing a sealing ring are respectively arranged at both ends of the rolling gap; a clamping device is also arranged between the two support bearings; The clamping device comprises a spring and two clamping members symmetrically arranged at both ends of the spring, each clamping member comprises a pressing plate and a sliding plate vertically arranged at one end of the pressing plate, the pressing plate is disc-shaped, and a through hole II for the ball screw to pass through is also provided on the pressing plate, the sliding plate is cylindrical with openings at both ends, one end of the sliding plate is arranged in the sliding gap, and the other end of the sliding plate is connected to the pressing plate; when the spring is not subjected to external force, the distance between the two clamping members is greater than the distance between the two support bearings after the bearing support device is installed; multiple groups of springs are arranged between the two clamping members of the clamping device; The support bearing is an angular contact ball bearing, and the contact angle of the angular contact ball bearing is 60°.

2. A bearing support device for a ball screw according to claim 1, characterized in that: The number of mounting ears is more than two.

3. A bearing support device for a ball screw according to claim 1, characterized in that: The two supporting shells are fixed by bolts and nuts matching the bolts, and the bolts are arranged in the mounting holes.

4. A bearing support device for a ball screw according to claim 1, characterized in that: The countersink is a tapered countersink.

5. A bearing support device for a ball screw according to claim 1, characterized in that: A retaining frame is further provided between the outer ring and the inner ring, and the rolling body is arranged in a hole of the retaining frame.

6. A bearing support device for a ball screw according to claim 5, characterized in that: The retaining frame is a nylon retaining frame.

7. A bearing support device for a ball screw according to claim 1, characterized in that: The sealing ring is a polytetrafluoroethylene sealing tape.

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