Linear motion bearing and manufacturing process thereof

Abstract

The invention relates to the field of industrial robot bearings, in particular to a linear motion bearing and a manufacturing process thereof. A linear motion bearing comprises a groove rod, a sliding cavity is formed in the groove rod, a ball is installed in the sliding cavity from one end of the sliding cavity, the ball partially protrudes out of the sliding cavity, and detachable battens are connected to the left side and the right side of a ball seat through bolts. A manufacturing process of a linear motion bearing comprises the steps that S1, a plurality of ball seats are prepared, and a plurality of balls are installed in the ball seats; s2, a plurality of ball seats are installed between the two groove rods, and the two side plates are blocked at the ends of the two groove rods; s3, four sets of slide way components composed of the two groove rods and the two side plates are prepared; s4, the four sets of slide way components are annularly installed between the two annular plates, and the two annular plates are fixed through the four outer plates; and S5, the two circular ring plates and the four outer plates are installed in an outer cover for protection. Parts can be helped to slide linearly, and the balls can be replaced after being damaged.

Description

Technical Field

[0001] This invention relates to the field of industrial robot bearings, and more specifically to a linear motion bearing and its manufacturing process. Background Technology

[0002] In mechanical transmission systems, linear motion bearings, as core components for achieving precise linear motion, are widely used in the field of industrial robot bearings. Currently, most common linear motion bearings on the market use balls as rolling elements, achieving linear motion through the rolling of the balls between the guide rail and the bearing housing. However, existing linear motion bearings have problems in practical use. When the balls suffer wear, breakage, or other damage due to long-term use, the enclosed structure and complex assembly of existing linear motion bearings make it difficult to remove the balls from the bearing for individual replacement. Typically, the entire bearing must be scrapped, resulting in a waste of resources. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a linear motion bearing and its manufacturing process, which has the advantages of helping parts slide linearly and allowing the balls to be replaced when damaged.

[0004] A linear motion bearing includes a grooved rod with a sliding cavity. Balls are inserted into the sliding cavity from one end, with the ball portion protruding from the sliding cavity. Removable strips are bolted to both sides of the ball bearing seat.

[0005] It also includes grooved rods, two grooved rods are arranged in parallel, and each grooved rod has a sliding groove on its opposite surface. Both sides of the ball bearing seat are integrally formed with protruding ridges, and the two protruding ridges are slidably connected to the two sliding grooves respectively. Multiple ball bearing seats are arranged between the two grooved rods, and the two grooved rods are fixed between the two side plates.

[0006] The ball bearing seat has cylinders on both of its plates, and springs are installed between two adjacent plates, with the two ends of the springs fixed to the corresponding cylinders.

[0007] Two rectangular sleeves are provided on the side plate. The end of the grooved rod is inserted into the corresponding rectangular sleeve, and the insert rod is inserted into the rectangular sleeve and the grooved rod to fix the grooved rod on the rectangular sleeve.

[0008] A manufacturing process for a linear motion bearing includes the following steps:

[0009] S1: Prepare multiple ball bearing seats and install multiple balls into the multiple ball bearing seats;

[0010] S2: Install multiple ball bearing seats between two grooved rods and block the ends of the two grooved rods with two side plates;

[0011] S3: Prepare four sets of slide rail components consisting of two groove rods and two side plates;

[0012] S4: Install the four sets of slide components in a ring between the two circular plates, and fix the two circular plates with four outer plates;

[0013] S5: Install the two circular plates and four outer plates into the outer cover for protection. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 A schematic diagram of the structure of a linear motion bearing Figure 1 ;

[0016] Figure 2 A schematic diagram of a partial structure of a linear motion bearing. Figure 1 ;

[0017] Figure 3 A schematic diagram of a partial structure of a linear motion bearing. Figure 2 ;

[0018] Figure 4 Schematic diagram of the grooved rod structure Figure 1 ;

[0019] Figure 5 Schematic diagram of the grooved rod structure Figure 2 ;

[0020] Figure 6 Schematic diagram of the ball bearing seat Figure 1 ;

[0021] Figure 7 Schematic diagram of the ball bearing seat Figure 2 ;

[0022] Figure 8 This is a schematic diagram of the structure of a circular ring plate;

[0023] Figure 9 This is a schematic diagram of the outer casing.

[0024] Figure 10 A schematic diagram of the structure of a linear motion bearing Figure 2 ;

[0025] In the figure: 101 grooved rod; 102 diagonal rod; 103 insert rod; 104 rectangular sleeve; 105 protrusion; 106 side plate; 107 screw; 108 sliding sleeve; 109 sliding groove; 110 side plate; 111 retaining ring;

[0026] 201 Ball bearing seat; 202 Protruding rib; 203 Ball bearing; 204 Slide cavity; 205 Spring; 206 Strip plate;

[0027] Circular ring plate 301; Perforated plate 302; Strip groove 303; Outer plate 304;

[0028] Outer cover 401; gasket 402; threaded hole 403. Detailed Implementation

[0029] exist Figure 1 The front half of the outer cover 401 is not shown; only the rear half of the structure of the outer cover 401 is shown. The unshown portion does not affect the disclosure of the technical solution of this invention. This approach satisfies the disclosure requirements of a patent while improving the clarity of the drawings through reasonable omissions. The complete structure of the outer cover 401 is shown in... Figure 10 As shown in [the document / reference]. And... Figure 1 In the linear motion bearings shown, to illustrate the relative positions of the linear motion bearings and the sliding parts mounted on them, Figure 1 The image shows a cylindrical sliding component inserted into a linear motion bearing. Figure 2 and Figure 3 To avoid cluttering the drawings, a ball bearing seat 201 is shown installed between two slotted rods 101.

[0030] like Figure 4-7 As shown;

[0031] Since the linear motion bearing includes a grooved rod 101, and a sliding cavity 204 is provided on the grooved rod 101, the ball 203 is installed into the sliding cavity 204 from one end of the sliding cavity 204. The ball 203 protrudes out of the sliding cavity 204. The left and right sides of the ball seat 201 are connected to detachable strips 206 by bolts. The ball 203 can roll within the sliding cavity 204. The ball 203 protrudes out of the sliding cavity 204 and contacts the sliding parts, reducing the friction when the sliding parts slide. The two detachable strips 206 block both ends of the sliding cavity 204 to prevent the ball 203 from falling out of the sliding cavity 204. After removing one of the strips 206, the ball 203 can be removed from the sliding cavity 204 and replaced.

[0032] During equipment maintenance, technicians only need to loosen the bolts on one side to completely remove the worn ball bearing 203 from the slide cavity 204, reducing equipment downtime costs. The ball bearing 203 protrudes from the slide cavity 204 and directly contacts the sliding parts, transforming traditional sliding friction into low-resistance rolling friction. Combined with the precise guidance of the slide cavity 204, motion accuracy is improved, effectively meeting the linear motion accuracy requirements of the sliding components of industrial robots.

[0033] Replacing the ball bearing 203 in a traditional bearing requires complex specialized tools and skilled technicians. This solution, however, allows ordinary maintenance personnel to perform the operation. Combined with the ability to replace the ball bearing 203 individually, it reduces bearing maintenance costs. Finally, the structure offers strong compatibility and wide applicability; by adjusting the dimensions of the groove rod 101, it can accommodate ball bearings 203 of different diameters.

[0034] like Figure 4-7 As shown;

[0035] Since the linear motion bearing also includes a groove 101, the two grooves 101 are arranged in parallel, and each of the two grooves 101 has a sliding groove 109 on its opposite surface. Both sides of the ball seat 201 are integrally formed with a protrusion 202, and the two protrusions 202 are slidably connected to the two sliding grooves 109 respectively. Multiple ball seats 201 are arranged between the two grooves 101. The two grooves 101 are fixed between the two side plates 106. Multiple ball seats 201 are arranged between the two grooves 101, and each ball seat 201 has a ball 203, so that the sliding parts can contact multiple balls 203 at the same time.

[0036] By setting multiple ball seats 201 between two slotted rods 101, with balls 203 distributed on each ball seat 201, the sliding parts can contact multiple balls 203 simultaneously. Compared with the traditional single ball seat or a small number of balls structure, this design evenly distributes the load to multiple balls, improving the overall load-bearing capacity of the bearing;

[0037] The groove 109 of the slot rod 101 and the protrusion 202 of the ball bearing seat 201 form a precision sliding fit structure, providing precise guidance for the linear motion of the ball bearing seat 201. Multiple ball bearing seats 201 work together between the slot rods 101, further reducing wobbling and offset during the movement and ensuring the stability of the sliding parts during operation.

[0038] Multiple ball bearing seats 201 and ball bearings 203 work together, so that the friction of the sliding parts is distributed to different contact points, avoiding excessive pressure on a single ball bearing seat and thus accelerating wear.

[0039] The quantity and layout can be flexibly adjusted according to actual working conditions. When dealing with sliding parts of different sizes, weights and motion requirements, the number of ball bearings 201 can be increased or decreased to quickly adapt to various application scenarios, significantly improving the versatility of linear motion bearings.

[0040] like Figure 6-7 As shown;

[0041] Two bars 206 on the ball bearing seat 201 are each provided with a cylinder. A spring 205 is provided between two adjacent bars 206. The two ends of the spring 205 are respectively fixed on the two corresponding cylinders. A spring 205 is provided between two adjacent ball bearing seats 201.

[0042] The springs 205 installed between adjacent ball bearing seats 201 can effectively absorb the impact and vibration from the sliding parts during equipment operation. When the sliding parts are impacted by sudden load changes or high-speed start-stop, the springs 205 buffer the energy through elastic deformation, preventing the impact force from acting directly on the balls and ball bearing seats 201, significantly reducing the impact of vibration on the bearings and effectively extending the service life of the equipment.

[0043] The elastic properties of spring 205 endow the bearing with self-adjusting capability. Under different load conditions, the spring can push the ball seat 201 to finely adjust its position, ensuring that each ball 203 is evenly stressed and preventing local overload.

[0044] The buffering effect of spring 205 can effectively reduce rigid collisions between sliding parts and balls 203, and reduce the wear rate of the parts surface. At the same time, by absorbing vibration, the spring can suppress noise generated by friction between parts, making the linear motion bearing quieter during operation.

[0045] The cylinder on the strip 206, in conjunction with the spring 205, not only provides a stable mounting point for the spring but also enhances the structural strength of the ball bearing seat 201. During frequent extension and contraction of the spring, the cylinder effectively disperses stress, preventing the strip 206 from deforming or being damaged due to uneven stress, further improving the reliability and durability of the overall bearing structure.

[0046] like Figure 4-5 As shown;

[0047] The side plate 106 is provided with two rectangular sleeves 104. The end of the grooved rod 101 is inserted into the corresponding rectangular sleeve 104. The insertion rod 103 is inserted into the rectangular sleeve 104 and the grooved rod 101, fixing the grooved rod 101 to the rectangular sleeve 104. Through the cooperation between the grooved rod 101 and the rectangular sleeve 104, a detachable connection structure is formed between the grooved rod 101 and the side plate 106. After removing one side plate 106, a ball bearing seat 201 can be installed between the two grooved rods 101, which facilitates the installation and removal of the ball bearing seat 201.

[0048] like Figure 6-7 As shown;

[0049] Since both side plates 106 are provided with cylinders, and springs 205 are fixed on the cylinders on both side plates 106, the other end of the springs 205 is connected to the cylinder on the strip 206 at the edge. By providing springs 205 between the side plates 106 and the ball bearing seats 201 at the edge, collisions between the ball bearing seats 201 at the edge and the side plates 106 are avoided.

[0050] like Figure 4-5 As shown in Figure 8;

[0051] Since the linear motion bearing also includes two annular plates 301, four outer plates 304 are fixed on the outer side of the two annular plates 301. The four outer plates 304 are arranged in a ring between the two annular plates 301. Each annular plate 301 has four strip grooves 303 arranged in a ring. The slide rail component composed of two groove rods 101 and two side plates 106 is provided in four sets. The outer side of the side plate 106 is fixed with a protrusion 105. The two protrusions 105 on the slide rail component are slidably connected to the two opposite strip grooves 303 respectively. The four slide rail components can slide on the strip grooves 303 in four directions, so that the four slide rail components can move closer or further away from each other. The sliding part can be inserted between the four slide rail components, and then the position of the four slide rail components can be adjusted so that the multiple balls 203 on the four slide rail components are in contact with different surfaces of the sliding part. The balls 203 in multiple directions support the different surfaces of the slide rail components. It overcomes the limitations of traditional linear motion bearings that only support in one direction, effectively dispersing loads and torques from different directions, greatly improving the bearing's load-bearing capacity and stability under complex working conditions, and is suitable for equipment that needs to withstand multi-directional loads.

[0052] Under conditions of high-speed motion or frequent start-stop, traditional linear motion bearings are prone to wobbling or misalignment due to inertial forces and centrifugal forces. In this structure, the four-way ball bearings 203 work together to provide support, forming a three-dimensional stable frame that effectively suppresses lateral displacement and torsion of sliding parts.

[0053] The independent sliding connection design of the four slide rail components and the annular plate 301 gives the entire bearing system a modular characteristic. When it is necessary to replace sliding parts of different specifications, only the position of the slide rail components needs to be adjusted to complete the adaptation, without disassembling the entire bearing system.

[0054] like Figure 4-5 As shown in Figure 8;

[0055] Since each of the outer plates 304 is slidably connected to a sliding sleeve 108, and both sides of the sliding sleeve 108 are hinged to a diagonal rod 102 via a shaft, and the other ends of the two diagonal rods 102 are respectively hinged to the outside of the two groove rods 101 on the slide rail component, the slide rail component can be driven to slide on the strip groove 303 in the corresponding direction by sliding the sliding sleeve 108, thereby adjusting the position of the slide rail component, and finally adjusting the position of the multiple balls 203 on the slide rail component.

[0056] like Figure 4-5 As shown in Figure 8;

[0057] Since each outer plate 304 has a side piece 110 fixed at both ends, the two ends of the screw 107 are respectively fitted into the two side pieces 110 with clearance. Both ends of the screw 107 are fixed with retaining rings 111, which are located on the outside of the two side pieces 110 respectively. Both ends of the screw 107 are fixed with hexagonal heads, and nuts are fixed on the sliding sleeve 108. The screw 107 and the nut are threaded together. The screw 107 can be rotated by the hexagonal head. The two retaining rings 111 limit the rotation of the screw 107 to prevent it from moving left or right relative to the two side pieces 110. When the screw 107 rotates, it drives the nut and the sliding sleeve 108 to slide. At this time, the sliding sleeve 108 slides on the outer plate 304, which drives the slide rail component to slide and adjust its position.

[0058] like Figure 8-9 As shown;

[0059] Since the outer cover 401 is cylindrical, four pads 402 are fixed in a ring on the inner side of the outer cover 401. Each ring plate 301 is set between the four pads 402. Each ring plate 301 is fixed in a ring with four hole plates 302. Each hole plate 302 is inserted with a bolt. Both ends of the pads 402 are provided with threaded holes 403. The threads on each hole plate 302 are threaded into the corresponding threaded holes 403.

[0060] The cylindrical outer cover 401, together with four inner ring-fixed pads 402, forms a sturdy external support frame that firmly clamps the annular plate 301 within it. The perforated plate 302 is tightly connected to the threaded holes 403 of the pads 402 by bolts, so that the slide components, annular plate and other components inside the bearing form a whole, effectively resisting external impacts and vibrations.

[0061] The orifice plate 302 and the pad strip 402 are quickly connected and separated by bolts. Compared with traditional welding or integrated structure, during installation, only the threaded hole 403 needs to be aligned and the bolts tightened to fix the outer cover and internal components. During disassembly and maintenance, the outer cover can be easily removed by loosening the bolts to inspect and replace the internal balls and springs.

[0062] The cylindrical outer casing 401 creates a space that facilitates centralized lubrication of the bearing's interior, preventing oil leakage and evaporation and effectively extending the lubrication cycle. Simultaneously, the outer casing 401 serves as a heat dissipation channel, rapidly transferring heat generated during bearing operation to the outside. Compared to an open structure, this prevents overheating from degrading the material properties of the balls and slideways, ensuring the bearing's reliability during prolonged continuous operation.

[0063] A manufacturing process for a linear motion bearing includes the following steps:

[0064] S1: Prepare multiple ball bearing seats 201 and install multiple balls 203 into the multiple ball bearing seats 201;

[0065] S2: Install multiple ball bearing seats 201 between two grooved rods 101, and block the ends of the two grooved rods 101 with two side plates 106;

[0066] S3: Prepare four sets of slide rail components consisting of two groove rods 101 and two side plates 106;

[0067] S4: Install the four sets of slide components in a ring between the two annular plates 301, and fix the two annular plates 301 with four outer plates 304;

[0068] S5: Install the two annular plates 301 and the four outer plates 304 into the outer cover 401 for protection.

Claims

1. A linear motion bearing, comprising a grooved rod (101), characterized in that: The groove rod (101) is provided with a sliding cavity (204). The ball (203) is inserted into the sliding cavity (204) from one end of the sliding cavity (204). The ball (203) protrudes out of the sliding cavity (204). The left and right sides of the ball seat (201) are connected with detachable strips (206) by bolts.

2. The linear motion bearing according to claim 1, characterized in that: It also includes a groove rod (101), two groove rods (101) are arranged in parallel, and a sliding groove (109) is provided on the opposite surface of the two groove rods (101). Both sides of the ball seat (201) are integrally formed with a protruding ridge (202). The two protruding ridges (202) are slidably connected to the two sliding grooves (109) respectively. Multiple ball seats (201) are provided between the two groove rods (101). The two groove rods (101) are fixed between the two side plates (106).

3. A linear motion bearing according to claim 2, characterized in that: The ball bearing seat (201) has two strips (206) with cylinders on each strip, and a spring (205) is provided between two adjacent strips (206), with the two ends of the spring (205) fixed to the corresponding two cylinders respectively.

4. A linear motion bearing according to claim 3, characterized in that: The side plate (106) is provided with two rectangular sleeves (104), the end of the grooved rod (101) is inserted into the corresponding rectangular sleeve (104), and the insert rod (103) is inserted into the rectangular sleeve (104) and the grooved rod (101) to fix the grooved rod (101) on the rectangular sleeve (104).

5. A linear motion bearing according to claim 4, characterized in that: Both side plates (106) are provided with cylinders, and springs (205) are fixed on the cylinders on both side plates (106). The other end of the springs (205) is connected to the cylinder on the strip (206) at the edge.

6. A linear motion bearing according to claim 5, characterized in that: It also includes two annular plates (301), and four outer plates (304) are fixed on the outer side of the two annular plates (301). The four outer plates (304) are arranged in a ring between the two annular plates (301). Each annular plate (301) has four strip grooves (303) arranged in a ring. The slide component consisting of two groove rods (101) and two side plates (106) is provided in four sets. The outer side of the side plate (106) is fixed with a protrusion (105). The two protrusions (105) on the slide component are slidably connected to the two opposite strip grooves (303).

7. A linear motion bearing according to claim 6, characterized in that: Each of the outer plates (304) is slidably connected to a sleeve (108), and both sides of the sleeve (108) are hinged to a diagonal rod (102) via a shaft. The other ends of the two diagonal rods (102) are respectively hinged to the outside of two groove rods (101) on the slide rail component.

8. A linear motion bearing according to claim 7, characterized in that: Each outer plate (304) has a side plate (110) fixed at both ends. The two ends of the screw (107) are respectively inserted into the two side plates (110) with clearance fit. The two ends of the screw (107) are fixed with retaining rings (111). The two retaining rings (111) are located on the outside of the two side plates (110). The two ends of the screw (107) are fixed with hexagonal screw heads. Nuts are fixed on the sliding sleeve (108). The screw (107) and the nut are connected by threads.

9. A linear motion bearing according to claim 8, characterized in that: The outer cover (401) is cylindrical in shape. Four pads (402) are fixed in a ring on the inner side of the outer cover (401). Each ring plate (301) is set between the four pads (402). Each ring plate (301) has four hole plates (302) fixed in a ring. Each hole plate (302) is fitted with a bolt. Both ends of the pads (402) are provided with threaded holes (403). The threads on each hole plate (302) are threaded into the corresponding threaded holes (403).

10. A manufacturing process for a linear motion bearing, characterized in that, Includes the following steps: S1: Prepare multiple ball bearing seats (201) and install multiple balls (203) into multiple ball bearing seats (201); S2: Install multiple ball bearing seats (201) between two groove rods (101) and block the ends of the two groove rods (101) with two side plates (106); S3: Prepare four sets of slide rail components consisting of two groove rods (101) and two side plates (106); S4: Install the four sets of slide components in a ring between the two annular plates (301), and fix the two annular plates (301) with four outer plates (304); S5: Install the two annular plates (301) and four outer plates (304) into the outer cover (401) for protection.

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