Heavy-load ball screw supporting bearing

By adopting a 50-55° contact angle and a PPS injection molded cage in the heavy-duty ball screw support bearing, and combining fixed and moving mechanisms, the problem of insufficient load capacity is solved, and the effects of high load capacity and long life are achieved.

CN223399090UActive Publication Date: 2025-09-30CSC BEARING
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Patent Information

Application Number
CN202521692482.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-11
Publication Date
2025-09-30
Estimated Expiration
2035-08-11

AI Technical Summary

Technical Problem

The contact angle design of existing heavy-duty ball screw support bearings is insufficient when subjected to high loads, resulting in insufficient load capacity and making it difficult to meet high precision and high rigidity requirements.

Method used

It adopts a contact angle design of 50-55°, a ratio of steel ball diameter to ball bearing cross-section thickness of 0.65-0.75, uses a PPS injection molded retainer, and realizes convenient installation and removal of ball bearings through a fixed and movable mechanism.

Benefits of technology

The load capacity of the ball screw support bearing is improved, the risk of centrifugal force deformation and cage fatigue fracture under high-speed movement is reduced, and the service life is extended.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a heavy-load ball screw supporting bearing, and belongs to the technical field of bearings. The heavy-load ball screw supporting bearing comprises a supporting seat and a ball bearing, the ball bearing comprises an outer ring, a retainer is arranged in the outer ring, an inner ring is arranged in the retainer, a plurality of groups of steel balls are arranged on the outer surface of the retainer, the contact angle in the ball bearing is set to be 50-55 degrees, and the contact angle in the ball bearing is set to be 50-55 degrees. The ratio of the diameter of the steel balls to the thickness of the section of the ball bearing is 0.65-0.75, the retainer adopts a PPS injection molding part, the contact angle in the ball bearing is set to be 50-55 degrees, the ratio of the diameter of the steel balls to the thickness of the section of the ball bearing is 0.65-0.75, and the retainer adopts the PPS injection molding part, so that the ball bearing has the advantages of being lighter, high in strength and the like.
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Description

Technical Field

[0001] The utility model relates to the field of bearings, and in particular to a heavy-loaded ball screw support bearing. Background Art

[0002] Heavy-duty ball screw support bearings are special bearings designed to withstand high axial loads and certain radial loads. They are widely used in mechanical transmission systems that require high precision, high rigidity and heavy load capacity. Their core function is to convert rotational motion into precise linear motion (or vice versa) while bearing high loads.

[0003] In existing technology, the contact angle of heavy-duty ball screw support bearings refers to the angle between the normal line of the contact point between the rolling element (ball) and the outer ring raceway and the bearing's rotation radius. By properly selecting the contact angle, the bearing's load capacity, transmission efficiency, lifespan, and positioning accuracy can be optimized, thereby meeting high-performance requirements under different working conditions.

[0004] How to improve the load capacity of heavy-duty ball screw support bearings is a technical problem that needs to be solved urgently. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a heavy-duty ball screw support bearing, aiming to improve the load capacity of the ball screw support bearing.

[0006] The present invention provides a heavy-duty ball screw support bearing, comprising:

[0007] A support seat and a ball bearing, wherein the support seat is provided with a fixing mechanism for fixing the ball bearing, and the support seat is provided with a moving mechanism for driving the ball bearing to move;

[0008] The ball bearing comprises an outer ring, an inner ring, a cage and steel balls;

[0009] The contact angle in the ball bearing is set to 50-55 degrees, the ratio of the diameter of the steel ball to the cross-sectional thickness of the ball bearing is 0.65-0.75, and the retainer is a PPS injection molded part;

[0010] The moving mechanism includes two groups of cavities, which are symmetrically opened inside the support seat and located on one side of the fixed groove. A third moving part is slidably connected inside the cavity, and a connecting rod is connected to the top of the third moving part. One end of the connecting rod passes through the support seat and is connected to a U-shaped part, and the U-shaped part is connected to one side of the horizontal plate.

[0011] Preferably, the fixing mechanism includes two groups of fixing parts, which are symmetrically connected to the outer surface of the outer ring, and positioning holes are provided on the tops of the two groups of fixing parts. Two groups of fixing grooves for movably plugging the fixing parts are provided on one side of the support seat.

[0012] Preferably, the top of the support seat is connected to two groups of shells, the interior of the shell is slidably connected to a first moving member, the bottom of the first moving member is connected to a positioning member, and the positioning member is movably inserted into the interior of the positioning hole.

[0013] Preferably, a first inclined surface is formed at one end of the positioning member.

[0014] Preferably, the top of the first movable member is connected to a vertical rod, the other end of the vertical rod passes through the shell and is connected to a horizontal plate, and a spring is sleeved on the outer surface of the vertical rod.

[0015] Preferably, a through hole is opened inside the support seat, the cavity is connected with the fixing groove through the through hole, a second moving part is provided inside the through hole, and two groups of sliders are connected to the inner wall of the through hole.

[0016] Preferably, two groups of sliding grooves are provided on the top of the second movable member, and the sliding blocks are slidably connected inside the sliding grooves.

[0017] Preferably, a second inclined surface is formed on one end of the second movable member.

[0018] Preferably, a groove is formed at one end of the second movable member.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting the contact angle within the ball bearing to 50-55° and the ratio of the steel ball diameter to the ball bearing cross-section thickness to 0.65-0.75, the cage is made of PPS injection molding. Ball screws are often used in high-speed reciprocating motion. Traditional metal cages can deform due to centrifugal forces. PPS is lightweight (density approximately 1.35g / cm³), which reduces inertia and reduces centrifugal deformation at high speeds. Furthermore, the cyclic loads of ball screws can easily lead to fatigue fracture in the cage. The high mechanical strength and creep resistance of PPS extend the service life.

[0021] 2. Through the setting of the fixing mechanism and the moving mechanism, the positioning member can be inserted into the interior of the positioning hole, the fixing member can be limited inside the fixing groove, and the ball bearing can be fixed inside the support seat. When the connection between the ball bearing and the support seat needs to be disconnected, it is only necessary to pull the cross plate to drive the first moving member to move, so that the positioning member can be disengaged from the positioning hole, and the limitation of the positioning member on the fixing member is released. After the positioning member is disengaged from the positioning hole, continue to pull the cross plate upward to move the fixing member to the outside of the fixing groove. The fixing hole is no longer located below the fixing member, and you can let go and the staff can take out the ball bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of a heavy-duty ball screw support bearing in a certain embodiment of the present utility model;

[0024] Figure 2 A schematic diagram of the ball bearing structure provided by an embodiment of the present utility model;

[0025] Figure 3 A cross-sectional view of a ball bearing provided in an embodiment of the present utility model;

[0026] Figure 4 A schematic diagram of the fixing groove structure provided by an embodiment of the present utility model;

[0027] Figure 5 A schematic diagram of the positioning member structure provided by an embodiment of the present utility model;

[0028] Figure 6 A schematic diagram of a spring structure provided in an embodiment of the present utility model;

[0029] Figure 7 A schematic diagram of a cavity structure provided by an embodiment of the present utility model;

[0030] Figure 8 A schematic diagram of a slider structure provided in an embodiment of the present utility model;

[0031] Figure 9 This is a schematic structural diagram of a second moving part provided in an embodiment of the present utility model.

[0032] In the figure: 1. ball bearing; 101. outer ring; 102. inner ring; 103. retaining frame; 104. steel ball; 2. fixing mechanism; 201. fixing part; 202. positioning hole; 203. fixing groove; 204. housing; 205. positioning part; 206. horizontal plate; 207. first moving part; 208. spring; 209. vertical rod; 2010. first inclined surface; 3. moving mechanism; 301. second moving part; 302. U-shaped part; 303. connecting rod; 304. cavity; 305. third moving part; 306. slider; 307. through hole; 308. sliding groove; 309. second inclined surface; 3010. groove; 4. support seat. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] See also Figure 1 The utility model provides a heavy-duty ball screw support bearing, comprising a support seat 4 and a ball bearing 1.

[0035] See also Figure 1 、 Figure 2 and Figure 3 , a fixing mechanism 2 for fixing the ball bearing 1 is provided inside the support seat 4, and a moving mechanism 3 for driving the ball bearing 1 to move is provided inside the support seat 4;

[0036] The ball bearing 1 includes an outer ring 101 , an inner ring 102 , a cage 103 and steel balls 104 .

[0037] See also Figures 1 to 9 The contact angle in the ball bearing 1 is set to 50-55 degrees, the ratio of the diameter of the steel ball 104 to the cross-sectional thickness of the ball bearing 1 is 0.65-0.75, and the cage 103 is made of PPS injection molding.

[0038] In the specific setting, the fixing mechanism 2 includes two groups of fixing parts 201, and the two groups of fixing parts 201 are symmetrically connected to the outer surface of the outer ring 101. Positioning holes 202 are provided on the tops of the two groups of fixing parts 201, and two groups of fixing grooves 203 for movably plugging the fixing parts 201 are provided on one side of the support seat 4. Among them, through the setting of the fixing groove 203, the fixing part 201 can be inserted into the interior of the fixing groove 203, and by limiting the fixing part 201 inside the fixing groove 203, the ball bearing 1 can be fixed inside the support seat 4.

[0039] In the specific setting, two groups of shells 204 are connected to the top of the support seat 4, and the first movable member 207 is slidably connected to the inside of the shell 204. The bottom of the first movable member 207 is connected to the positioning member 205, and the positioning member 205 is movably inserted into the inside of the positioning hole 202. Among them, through the setting of the first movable member 207, the movement of the first movable member 207 can be controlled to drive the positioning member 205 to move, and the positioning member 205 can be inserted into the inside of the positioning hole 202, and the fixing member 201 is limited to the inside of the fixing groove 203 through the positioning member 205.

[0040] In a specific configuration, a first inclined surface 2010 is provided at one end of the positioning member 205 . The first inclined surface 2010 can be configured so that when the fixing member 201 is inserted into the fixing groove 203 , squeezing the first inclined surface 2010 can drive the positioning member 205 to move.

[0041] In the specific setting, the top of the first movable member 207 is connected to a vertical rod 209, the other end of the vertical rod 209 passes through the shell 204 and is connected to the horizontal plate 206, and the outer surface of the vertical rod 209 is sleeved with a spring 208. Among them, through the setting of the horizontal plate 206, the horizontal plate 206 can be pulled to drive the vertical rod 209 to move, drive the first movable member 207 to move, and compress the spring 208. The spring 208 can prevent the first movable member 207 from moving at will when it is not under force.

[0042] In the specific setting, the moving mechanism 3 includes two groups of cavities 304, which are symmetrically opened inside the support seat 4 and located on one side of the fixed groove 203. The interior of the cavity 304 is slidably connected with a third moving member 305, and the top of the third moving member 305 is connected with a connecting rod 303. One end of the connecting rod 303 passes through the support seat 4 and is connected with a U-shaped member 302. The U-shaped member 302 is connected to one side of the horizontal plate 206. Among them, through the setting of the U-shaped member 302, when the horizontal plate 206 is pulled upward, the U-shaped member 302 is driven to move, which drives the connecting rod 303 to move upward, and can drive the third moving member 305 to move upward.

[0043] In the specific setting, a through hole 307 is opened inside the support seat 4, the cavity 304 is connected to the fixed groove 203 through the through hole 307, a second movable member 301 is arranged inside the through hole 307, and two sets of sliders 306 are connected to the inner wall of the through hole 307. Among them, through the setting of the through hole 307, the second movable member 301 can slide inside the through hole 307, and the second movable member 301 can push the ball bearing 1 to move a certain distance inside the support seat 4.

[0044] In the specific setting, two sets of sliding grooves 308 are opened on the top of the second movable member 301, and the slider 306 is slidably connected to the inside of the sliding groove 308. Among them, through the setting of the sliding groove 308, when the second movable member 301 slides, the slider 306 can be driven to slide inside the sliding groove 308, and the slider 306 will not fall out of the sliding groove 308.

[0045] During the specific setting, a second inclined surface 309 is provided at one end of the second movable member 301. Through the setting of the second inclined surface 309, when the third movable member 305 moves upward, the second inclined surface 309 can be squeezed, driving the second movable member 301 to move in the direction of the fixed groove 203, driving the ball bearing 1 to move a certain distance, so that after people pull the cross plate 206 upward to make the positioning member 205 disengage from the positioning hole 202, they continue to pull the cross plate 206 upward, which can make the fixing member 201 move to the outside of the fixing groove 203. The fixing hole is no longer located below the fixing member 201, and you can let go, release the positioning member 205 from the limiting position of the fixing member 201, and disconnect the connection between the support seat 4 and the ball bearing 1.

[0046] In a specific configuration, a groove 3010 is provided at one end of the second movable member 301 , wherein the connection rod 303 can pass through the second movable member 301 through the configuration of the groove 3010 .

[0047] The working principle of the heavy-duty ball screw support bearing: When using the heavy-duty ball screw support bearing, by setting the contact angle in the ball bearing 1 to 50-55 degrees, the ratio of the diameter of the steel ball 104 to the cross-sectional thickness of the ball bearing 1 is 0.65-0.75, and the cage 103 is made of PPS (polyphenylene sulfide) injection molding. The tensile strength, rigidity and hardness of PPS are close to those of metal. Compared with cages made of ordinary engineering plastics, it is lighter and has higher mechanical strength. It can withstand the high-speed impact and centrifugal force of the ball and reduce the risk of cage breakage. And when it is necessary to disconnect the connection between the ball bearing 1 and the support seat 4, it is only necessary to By pulling the horizontal plate 206 to drive the first movable member 207 to move, the positioning member 205 can be disengaged from the positioning hole 202, and the positioning member 205 can release the limit of the fixing member 201. After the positioning member 205 is disengaged from the positioning hole 202, the horizontal plate 206 is continued to be pulled upward, and the third movable member 305 will squeeze the second inclined surface 309, driving the second movable member 301 to move toward the fixed groove 203, so that the slider 306 slides inside the sliding groove 308, and the fixing member 201 can be moved to the outside of the fixing groove 203. The fixing hole is no longer located below the fixing member 201, and the staff can let go and take out the ball bearing 1.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heavy-duty ball screw support bearing, characterized in that: include: A support seat (4) and a ball bearing (1), wherein a fixing mechanism (2) for fixing the ball bearing (1) is provided inside the support seat (4), and a moving mechanism (3) for driving the ball bearing (1) to move is provided inside the support seat (4); The ball bearing (1) comprises an outer ring (101), an inner ring (102), a retaining frame (103) and steel balls (104); The contact angle in the ball bearing (1) is set to 50-55 degrees, the ratio of the diameter of the steel ball (104) to the cross-sectional thickness of the ball bearing (1) is 0.65-0.75, and the retainer (103) is a PPS injection molded part; The moving mechanism (3) comprises two groups of cavities (304), the two groups of cavities (304) being symmetrically opened inside the support seat (4) and located on one side of the fixing groove (203), the interior of the cavity (304) being slidably connected to a third moving member (305), the top of the third moving member (305) being connected to a connecting rod (303), one end of the connecting rod (303) passing through the support seat (4) and being connected to a U-shaped member (302), and the U-shaped member (302) being connected to one side of the transverse plate (206).

2. A heavy-duty ball screw support bearing according to claim 1, characterized in that: The fixing mechanism (2) comprises two groups of fixing members (201), the two groups of fixing members (201) are symmetrically connected to the outer surface of the outer ring (101), the tops of the two groups of fixing members (201) are provided with positioning holes (202), and one side of the support seat (4) is provided with two groups of fixing grooves (203) for movably plugging the fixing members (201).

3. A heavy-duty ball screw support bearing according to claim 2, characterized in that: The top of the support seat (4) is connected to two groups of shells (204), the interior of the shell (204) is slidably connected to a first moving member (207), the bottom of the first moving member (207) is connected to a positioning member (205), and the positioning member (205) is movably inserted into the interior of the positioning hole (202).

4. A heavy-duty ball screw support bearing according to claim 3, characterized in that: One end of the positioning member (205) is provided with a first inclined surface (2010).

5. A heavy-duty ball screw support bearing according to claim 4, characterized in that: The top of the first moving member (207) is connected to a vertical rod (209), the other end of the vertical rod (209) passes through the housing (204) and is connected to a horizontal plate (206), and a spring (208) is sleeved on the outer surface of the vertical rod (209).

6. A heavy-duty ball screw support bearing according to claim 1, characterized in that: A through hole (307) is provided inside the support seat (4), the cavity (304) is communicated with the fixing groove (203) through the through hole (307), a second moving member (301) is provided inside the through hole (307), and two groups of sliders (306) are connected to the inner wall of the through hole (307).

7. A heavy-duty ball screw support bearing according to claim 6, characterized in that: Two sets of sliding grooves (308) are provided on the top of the second moving member (301), and the sliders (306) are slidably connected inside the sliding grooves (308).

8. A heavy-duty ball screw support bearing according to claim 7, characterized in that: A second inclined surface (309) is provided at one end of the second movable member (301).

9. A heavy-duty ball screw support bearing according to claim 8, characterized in that: A groove (3010) is formed at one end of the second moving member (301).