Ball screw module quick assembly structure and method

Abstract

The application discloses a ball screw module quick assembling structure and method, and relates to the technical field of ball screw modules.The application comprises a screw rod, a nut is movably sleeved on the screw rod, a spiral rolling groove is formed in the inner wall of the nut, an arc-shaped rolling groove is formed in the nut, the two ends of the arc-shaped rolling groove are communicated with the two ends of the spiral rolling groove, and the spiral rolling groove and the arc-shaped rolling groove jointly form a circulating rolling track.The application forms the spiral rolling groove, the arc-shaped rolling groove and a mounting channel in the nut, the two ends of the spiral rolling groove and the arc-shaped rolling groove are communicated to form the circulating rolling track, the mounting channel is obliquely formed and is communicated with one of the connecting points of the spiral rolling groove and the arc-shaped rolling groove, when the ball is filled or removed, the screw rod only needs to be vertically erected, the orientation of the safety channel is adjusted, the circulating rolling track is automatically filled or the ball is automatically slid out of the circulating rolling track by using the gravity of the ball, the screw rod or the nut does not need to be rotated to generate a rotational thrust force for assistance, the operation mode is simple and convenient, and therefore the assembling efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of ball screw module technology, specifically to a rapid assembly structure and assembly method for a ball screw module. Background Technology

[0002] A ball screw module consists of a screw, a nut, and balls. Its function is to convert rotary motion into linear motion. This is a further extension and development of ball screws. The significance of this development is that it changes the bearing from rolling motion to sliding motion. Due to its very low frictional resistance, as well as its high precision, reversibility, and high efficiency, ball screws are widely used in various industrial equipment and precision instruments.

[0003] Some nuts are equipped with a circulator to make the balls circulate back and forth. The reciprocating rolling of the balls not only makes the movement smoother and reduces vibration and creep, but also evenly distributes the load during the rolling process, reducing local wear and extending the service life of the screw and nut. Most existing circulators adopt two structures: external circulation conduit type and internal circulation type. The external circulation type adds a conduit, while the internal circulation type embeds a mechanism with a specially shaped channel that spans and connects two adjacent raceways, forming a single closed return raceway. Both of these circulation methods mean that the balls are no longer arranged in a single helical pattern. This makes it difficult to quickly and smoothly load or remove the balls during assembly (loading or removing the balls). It is necessary to rotate the screw or nut to generate a helical thrust to assist in loading or removing the balls, which makes the assembly not fast and convenient and the assembly efficiency low. Therefore, this application proposes a rapid assembly structure and assembly method for ball screw modules. Summary of the Invention

[0004] The purpose of this application is to provide a rapid assembly structure and assembly method for a ball screw module in order to solve the problems mentioned above in the background art.

[0005] To achieve the above objectives, this application specifically adopts the following technical solution:

[0006] A quick assembly structure for a ball screw module includes:

[0007] A lead screw has a nut movably fitted onto it. The inner wall of the nut has a helical groove, and the nut also has an arc-shaped groove. The two ends of the arc-shaped groove are connected to the two ends of the helical groove. The helical groove and the arc-shaped groove together form a circulating raceway. Several balls are rolled in the circulating raceway. The nut has an inclined installation channel that connects to one of the connection points of the helical groove and the arc-shaped groove. The nut is equipped with a sealing element to block the installation channel.

[0008] Furthermore, the groove width of the spiral groove is smaller than the diameter of the ball.

[0009] Furthermore, the sealing component includes a fixing plate, which is fixed to a nut by bolts and screw holes, and the fixing plate is provided with a sealing block that is inserted into the installation channel.

[0010] Furthermore, the sealing block is constructed as a rectangular block, with the width of the sealing block being the same as the diameter of the ball, and the length of the sealing block being greater than the diameter of the ball.

[0011] Furthermore, the end of the sealing block near the circulating raceway is constructed with an arc surface, which is coplanar with the inner wall of the circulating raceway.

[0012] Furthermore, the sealing block has a storage cavity inside, and the arc surface has a seepage hole communicating with the storage cavity.

[0013] Furthermore, a sponge is provided inside the storage cavity, and a squeezing element for squeezing the sponge is provided on the fixing plate.

[0014] Furthermore, the extrusion member includes an extrusion rod slidably inserted into a fixed plate, and one end of the extrusion rod is provided with an extrusion plate slidably inserted into a storage cavity.

[0015] Furthermore, the nut is provided with an arc-shaped groove, which is connected to an arc-shaped rolling groove.

[0016] An assembly method for a rapid assembly structure of a ball screw module includes the following steps:

[0017] S1: Installation preparation, add lubricant into the storage cavity, insert the sealing block into the installation channel, press the squeezing rod to make the squeezing plate squeeze the sponge, so that the lubricant flows from the seepage hole to the circulation raceway, and the lubricant flows from the spiral groove and the arc groove. Then remove the sealing block.

[0018] S2: Install the ball bearings. Stand the nut upright and make the installation channel face upward. Place the ball bearings one by one into the installation channel. Under the action of gravity, the ball bearings will slide down along the spiral groove and the arc groove until the entire circulation track is completely filled. Then, insert the sealing block into the installation channel to seal it. Fix the fixing plate to the nut by the cooperation of bolts and screw holes.

[0019] S3: Assemble the module by placing the nut on the lead screw, turning the lead screw or nut, and engaging the ball bearing with the threaded groove on the lead screw to complete the assembly.

[0020] The beneficial effects of this application are as follows:

[0021] 1. In this application, a spiral groove, an arc-shaped groove, and an installation channel are formed inside the nut. The spiral groove and the arc-shaped groove are connected end to end to form a circulating raceway. The installation channel is opened at an angle and is connected to one of the spiral groove and the arc-shaped groove. When loading or unloading the balls, it is only necessary to stand the screw upright and adjust the orientation of the safety channel. The balls will automatically fill the circulating raceway or slide out of the circulating raceway by their own weight. There is no need to rotate the screw or nut to generate a directional thrust, which makes the operation simple and convenient, thereby improving the assembly efficiency.

[0022] 2. In this application, by making the groove width of the spiral groove smaller than the diameter of the ball, the ball cannot be dislodged from the nut through the groove of the spiral groove. This means that when loading or unloading the ball, the nut does not need to be fitted onto the screw, and loading is done by the nut alone. At the same time, when the nut is removed from the screw, the ball will not fall off and will not be lost, thereby further improving the convenience of loading or unloading.

[0023] 3. In this application, the sealing block is constructed as a rectangular block with an arc surface on one side that is coplanar with the circulating raceway, so that there is enough space during the unloading process, and the two balls will not abut against the installation channel due to the simultaneous slippage of the balls in the two channels, making the unloading process smoother. At the same time, after the installation channel is sealed, the balls roll more smoothly along the circulating raceway.

[0024] 4. In this application, by opening a storage cavity, a sponge, and a pressing element in the sealing block, the circulating raceway can be lubricated in advance when filling the balls, so that the balls can be filled more smoothly and quickly. At the same time, when the nut is running, the lubricant automatically lubricates the running balls, reducing the wear between the balls and the inner wall of the circulating raceway, thereby improving the service life. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of this application;

[0026] Figure 2 This is a three-dimensional structural sectional view of this application;

[0027] Figure 3 This is a partial sectional view of the three-dimensional structure of this application;

[0028] Figure 4 This is a three-dimensional structural diagram of the sealing component in this application;

[0029] Figure 5 This is another perspective three-dimensional structural diagram of the sealing component in this application;

[0030] Figure 6 This is a three-dimensional sectional view of the sealing component in this application;

[0031] Figure 7This is a schematic diagram of the circulating raceway of this application;

[0032] Figure 8 This is a schematic diagram of the ball bearing arrangement in this application;

[0033] Reference numerals: 1. Lead screw; 2. Nut; 3. Spiral groove; 4. Arc groove; 5. Ball bearing; 6. Installation channel; 7. Sealing component; 8. Arc surface; 9. Storage cavity; 10. Seepage hole; 11. Sponge; 12. Extrusion component; 13. Arc groove; 701. Fixing plate; 702. Sealing block; 1201. Extrusion rod; 1202. Extrusion plate. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0035] like Figures 1-8 As shown, one embodiment of this application proposes a quick assembly structure for a ball screw module, comprising:

[0036] A lead screw 1 has a nut 2 movably sleeved on it. Preferably, the lead screw 1 has a helical thread groove. An annular gap exists between the inner wall of the nut 2 and the outer wall of the lead screw 1. A helical groove 3 is formed on the inner wall of the nut 2, and an arc-shaped groove 4 is formed within the nut 2. The two ends of the arc-shaped groove 4 are connected to the two ends of the helical groove 3. The helical groove 3 and the arc-shaped groove 4 together form a circulating raceway. Several balls 5 are rolled within the circulating raceway. When the lead screw 1 or the nut 2 rotates, the balls 5 can reciprocate along the circulating raceway formed by the helical groove 3 and the arc-shaped groove 4. The reciprocating rolling of the balls 5 not only... The movement is smoother, reducing vibration and creep. Simultaneously, the ball bearings 5 ​​distribute the load evenly during cyclic rolling, reducing localized wear and extending the service life of the lead screw 1 and nut 2. The nut 2 has an inclined installation channel 6, which connects to one of the points of connection between the spiral groove 3 and the arc-shaped groove 4. The inclined design of the installation channel 6 makes the connection between the installation channel 6 and the spiral groove 3 and arc-shaped groove 4 smoother, facilitating the entry of the ball bearings 5 ​​from the installation channel 6 into the circulating raceway or vice versa. The nut 2 is equipped with a sealing element 7 to block the installation channel 6, such as... Figure 7As shown, the spiral groove 3 and the arc-shaped groove 4 are connected to form a circulating raceway. The spiral structure of the spiral groove 3 ensures that the two connecting points of the spiral groove 3 and the arc-shaped groove 4 are located at opposite ends of the axial direction of the nut 2. The mounting channel 6 is located at one end. When loading the ball bearing 5, the nut 2 is first fitted onto the screw 1, and the nut 2 and the screw 1 are erected so that they are coaxial, with the mounting channel 6 angled upwards. When the mounting channel 6 is angled upwards, it is located at the highest point of the spiral groove 3 and the arc-shaped groove 4. The ball bearing 5 is then placed into the mounting channel 6. Under the action of gravity, the ball bearing 5 will freely slide into the spiral groove 3 or the arc-shaped groove 4. Regardless of which channel the ball bearing 5 slides into, the spiral groove 3 and the arc-shaped groove 4 will be automatically connected. Fill (i.e., fill the circulating raceway). After the circulating raceway is filled, use the sealing component 7 to seal the safety channel 6, thus completing the assembly of the module. When disassembly is required, stand the nut 2 and the screw 1 upright, and tilt the safety channel 6 downwards. At this time, the safety channel 6 is located at the lowest point of the circulating raceway. Release the sealing component 7 from the safety channel 6. Under the action of gravity, both the ball 5 located in the spiral groove 3 and the ball 5 located in the arc groove 4 will slide out of the safety channel 6 under the action of gravity. When filling and removing the ball 5, it is only necessary to stand the screw 1 upright to adjust the orientation of the safety channel 6. There is no need to rotate the screw 1 or the nut 2 to generate a rotational thrust to assist, making the operation simple and convenient, thereby improving the assembly efficiency.

[0037] In this design, a spiral groove 3, an arc-shaped groove 4, and an installation channel 6 are formed inside the nut 2. The spiral groove 3 and the arc-shaped groove 4 are connected end to end to form a circulating raceway. The installation channel 6 is inclined and connected to one of the connecting points of the spiral groove 3 and the arc-shaped groove 4. When loading or unloading the balls 5, it is only necessary to erect the screw 1 and adjust the orientation of the safety channel 6. The balls 5 will automatically fill the circulating raceway or slide out of the circulating raceway by their own weight. There is no need to rotate the screw 1 or the nut 2 to generate a directional thrust, which makes the operation simple and convenient, thereby improving the assembly efficiency.

[0038] like Figure 3As shown, in some embodiments, the width of the groove 3 is smaller than the diameter of the ball 5. Preferably, the groove refers to the groove of the spiral groove 3 facing the inner wall of the nut 2. The ball 5 can roll normally along the spiral groove 3, and part of the ball 5 can protrude from the spiral groove 3 and roll into the threaded groove on the screw 1. However, when the ball 5 rolls in the spiral groove 3, it cannot detach from the spiral groove 3. This means that when loading the ball 5, the nut 2 does not need to be fitted onto the screw 1. The ball 5 can be loaded into the nut 2 first, and then the nut 2 can be fitted onto the screw 1. At the same time, when removing the ball 5, the nut 2 can be removed from the screw 1 first, and the ball 5 will not fall off or be lost during the removal process. Finally, the ball 5 can be removed from the nut 2, thereby further improving the convenience of loading or unloading and improving the assembly efficiency.

[0039] like Figure 4 and Figure 5 As shown, in some embodiments, the sealing component 7 includes a fixing plate 701, which is fixed to the nut 2 by bolts and screw holes. The fixing plate 701 is constructed with a sealing block 702 that is inserted into the installation channel 6. Preferably, the nut 2 is constructed with an inclined surface and screw holes are opened on the inclined surface. The fixing plate 701 overlaps with the inclined surface. When sealing the safety channel 6, the sealing block 702 is inserted into the safety channel 6, and the fixing plate 701 is made to fit against the inclined surface. Then, the bolt is threaded into the screw hole, thereby fixing the fixing plate 701 to the nut 2. The method of sealing or unsealing is relatively simple and convenient, only requiring the bolt to be turned, thereby improving the speed of overall assembly.

[0040] like Figure 5 As shown, in some embodiments, the sealing block 702 is constructed as a rectangular block with rounded corners on all four sides. The width of the sealing block 702 is the same as the diameter of the ball 5, and the length of the sealing block 702 is greater than the diameter of the ball 5. When loading the ball 5, the ball 5 placed from the installation channel 6 can freely choose the channel (i.e., the spiral raceway 3 and the arc raceway 4), and will eventually automatically fill the entire circulating raceway. When removing or unloading the ball 5, under the action of gravity, the ball 5 in the spiral raceway 3 and the arc raceway 4 will slide down. The ball 5 in the two raceways and close to the installation channel 6 can easily abut (the abutment can be released by slightly shaking the nut 2). By constructing the sealing block 702 as a rectangular block with a length greater than the diameter of the ball 5 (preferably twice the diameter), there is a sufficiently large falling space under the action of gravity, and the two will not abut against each other, so that the ball 5 slides out more smoothly, thereby further improving the unloading efficiency and improving practicality.

[0041] like Figure 5As shown, in some embodiments, the end of the blocking block 702 near the circulating raceway is constructed with an arc surface 8, which is coplanar with the inner wall of the circulating raceway. Since the installation channel 6 is opened for loading or unloading, the circulating raceway has a gap at the installation channel 6. By opening an arc surface 8 coplanar with the inner wall of the circulating raceway on the blocking block 702, when the blocking block 702 blocks the installation channel 6, the inclined surface 8 just fills the gap of the circulating raceway. Their coplanarity makes the ball 5 roll more smoothly during circulation and will not be affected by the gap, causing blockage or poor rolling. This ensures that the ball 5 can roll smoothly during circulation, thereby improving practicality.

[0042] like Figure 5 and Figure 6 As shown, in some embodiments, the sealing block 702 has a storage cavity 9 inside, and the arc surface 8 has a seepage hole 10 communicating with the storage cavity 9. By opening the seepage hole 10 in the sealing block 702 and the seepage hole 10 on the arc surface 8, lubricant can be added to the storage cavity 9. Before filling the ball bearings 5, the nut 2 is first erected so that the installation channel 6 faces upward, and the sealing block 702 is inserted into the installation channel 6. The lubricant in the storage cavity 9 flows to the circulation raceway through the seepage hole 10 to lubricate the inner wall of the circulation raceway. Then the sealing block 702 is removed, and the ball bearings 5 ​​are added. By lubricating the inner wall of the circulation raceway, the ball bearings 5 ​​slide more smoothly along its inner wall, and the ball bearings 5 ​​fill the circulation raceway more smoothly, thereby further improving the ease of assembly.

[0043] like Figure 6 As shown, in some embodiments, a sponge 11 is provided in the storage cavity 9, and a squeezing member 12 for squeezing the sponge 11 is provided on the fixing plate 701. By providing the sponge 11 in the storage cavity 9, the lubricant can slowly seep out by utilizing the absorbency of the sponge 11. By providing the squeezing member 12 for squeezing the sponge 11, when the balls 5 are being filled, the squeezing member 12 can be used to squeeze the sponge 11, so that slightly more lubricant can be added to lubricate the circulating raceway, so that the balls 5 can be filled more smoothly. After the balls 5 are filled, by utilizing the absorbency of the sponge 11, when the nut 2 is running, lubricant is automatically and slowly supplied to the circulating raceway to lubricate the balls 5 during their circulating rolling, reducing the wear between the balls 5 and the inner wall of the circulating raceway, thereby improving the service life.

[0044] like Figure 6 As shown, in some embodiments, the extruder 12 includes an extrusion rod 1201 slidably inserted into the fixed plate 701. One end of the extrusion rod 1201 is provided with an extrusion plate 1202 slidably inserted into the storage cavity 9. When it is necessary to extrude the sponge 11, the extrusion rod 1201 is pressed and slid, so that the extrusion plate 1202 extrudes the sponge 11, thereby accelerating the injection of lubricant. The adjustment method is relatively simple and convenient, thereby improving practicality.

[0045] like Figure 1 and Figure 3 As shown, in some embodiments, the nut 2 has an arc-shaped groove 13, which is connected to the arc-shaped roller groove 4. When the nut 2 is separated from the screw 1 to load or unload the ball bearings 5, the situation inside the spiral roller groove 3 can be observed through the inner through hole of the nut 2, but the situation inside the arc-shaped roller groove 4 cannot be observed. By opening the arc-shaped groove 13, which is connected to the arc-shaped roller groove 4, it is easier to observe the situation inside the arc-shaped roller groove 4, so as to ensure that the arc-shaped roller groove 4 is effectively filled when loading the ball bearings 5, or to ensure that the arc-shaped roller groove 4 is completely unloaded when unloading the ball bearings 5. At the same time, the arc-shaped groove 13 can also serve as a heat dissipation vent, so that the ball bearings 5 ​​can dissipate heat through the arc-shaped groove 13 when they are rolling at high speed, thereby improving practicality.

[0046] like Figures 1-8 As shown in this embodiment, an assembly method for a ball screw module quick assembly structure includes the following steps:

[0047] S1: Installation preparation, add lubricant into storage cavity 9, insert sealing block 702 into installation channel 6, press extrusion rod 1201 to make extrusion plate 1202 squeeze sponge 11, so that lubricant flows from seepage hole 10 to circulation raceway, lubricant flows from spiral groove 3 and arc groove 4, and then remove sealing block 702.

[0048] S2: Install the ball bearings, stand the nut 2 upright and make the installation channel 6 face upward, and put the ball bearings 5 ​​one by one into the installation channel 6. Under the action of gravity, the ball bearings 5 ​​slide down along the spiral groove 3 and the arc groove 4 respectively until the entire circulation track is completely filled. Then, insert the sealing block 702 into the installation channel 6 to seal it. Fix the fixing plate 701 to the nut 2 by the cooperation of bolts and screw holes.

[0049] S3: Assemble the module by placing the nut 2 on the lead screw 1, turning the lead screw 1 or the nut 2, and engaging the ball bearing 5 with the threaded groove on the lead screw 1 to complete the assembly.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quick assembly structure for a ball screw module, characterized in that, include: A lead screw (1) is movably fitted with a nut (2). The inner wall of the nut (2) is provided with a spiral groove (3). The nut (2) is provided with an arc groove (4). The two ends of the arc groove (4) are connected to the two ends of the spiral groove (3). The spiral groove (3) and the arc groove (4) together form a circulating raceway. Several balls (5) are rolled in the circulating raceway. An installation channel (6) is provided on the nut (2) at an angle. The installation channel (6) is connected to one of the connection points of the spiral groove (3) and the arc groove (4). A sealing part (7) is provided on the nut (2) to block the installation channel (6). The groove width of the spiral groove (3) is smaller than the diameter of the ball (5); The sealing component (7) includes a fixing plate (701), which is fixed to the nut (2) by the cooperation of bolts and screw holes. The fixing plate (701) has a sealing block (702) that is inserted into the installation channel (6). The sealing block (702) has an arc surface (8) at one end near the circulating raceway, and the arc surface (8) is coplanar with the inner wall of the circulating raceway; The sealing block (702) has a storage cavity (9) inside, and the arc surface (8) has a seepage hole (10) communicating with the storage cavity (9). The storage cavity (9) is provided with a sponge (11), and the fixing plate (701) is provided with a squeezing member (12) for squeezing the sponge (11).

2. The ball screw module quick assembly structure according to claim 1, characterized in that, The sealing block (702) is constructed as a rectangular block. The width of the sealing block (702) is the same as the diameter of the ball (5), and the length of the sealing block (702) is greater than the diameter of the ball (5).

3. The ball screw module quick assembly structure according to claim 1, characterized in that, The extrusion member (12) includes an extrusion rod (1201) that is slidably inserted into a fixed plate (701), and one end of the extrusion rod (1201) is provided with an extrusion plate (1202) that is slidably inserted into a storage cavity (9).

4. The quick assembly structure for the ball screw module according to claim 1, characterized in that, The nut (2) has an arc-shaped groove (13) which is connected to the arc-shaped rolling groove (4).

5. An assembly method for a ball screw module quick assembly structure, wherein the method is implemented using the ball screw module quick assembly structure as described in any one of claims 1 to 4, characterized in that, It includes the following steps: S1: Installation preparation, add lubricant into the storage cavity (9), insert the sealing block (702) into the installation channel (6), press the squeezing rod (1201) so that the squeezing plate (1202) squeezes the sponge (11), thereby allowing the lubricant to flow from the seepage hole (10) into the circulation raceway. The lubricant flows from the spiral groove (3) and the arc groove (4), and then remove the sealing block (702). S2: Install the ball bearings, stand the nut (2) upright and make the installation channel (6) face upward, and put the ball bearings (5) one by one into the installation channel (6). Under the action of gravity, the ball bearings (5) slide down along the spiral groove (3) and the arc groove (4) respectively until they completely fill the entire circulation track. Then insert the sealing block (702) into the installation channel (6) to seal it. Fix the fixing plate (701) to the nut (2) by the cooperation of bolts and screw holes. S3: Assemble the module by placing the nut (2) on the lead screw (1), turning the lead screw (1) or the nut (2), and engaging the ball (5) with the threaded groove on the lead screw (1) to complete the assembly.

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