Steel ball spline device with wheel strip

Abstract

The utility model discloses a steel ball spline device with a wheel strip, and relates to the field of mechanical transmission. Through the arrangement of the gear and the rack, the gear drives the rack so as to drive the spline shaft to move, so that the two ends of the spline shaft are loaded with power to push the spline shaft to reciprocate, and a gear cross correlation transmission device with a precision gear consistent with the rack in tooth shape can be added to drive the shaft to reciprocate; on the contrary, when the power of the shaft is at the two ends of the shaft, the other mechanism can be driven to operate by using the crossed gears bridged by the rack function while the reciprocating motion of the shaft is served, good performance is kept within a certain rotating speed range, and relatively stable power output can be provided in the moving process; meanwhile, the spline shaft is designed into a hollow hole, so that the weight of the shaft is greatly reduced, the load lifting speed of the whole mechanism is reduced, the energy consumption is reduced, the through hole can be used as an air hole or a signal line, and the spline shaft is attractive and saves space.

Description

Technical Field

[0001] The utility model relates to the field of mechanical transmission, in particular to a pulley-bar steel ball spline device. Background Art

[0002] A ball spline is a mechanical transmission component consisting of a spline shaft, a spline sleeve, balls, and a circulation mechanism. The spline shaft is a shaft with spline teeth, while the spline sleeve is a sleeve-shaped component that fits the spline shaft. The balls are located in a raceway between the spline shaft and the spline sleeve, and the circulation mechanism guides the balls in a circular motion within the raceway. Existing ball splines consist of a shaft with a ball raceway and a ball nut that work in a reciprocating motion. This type of shaft movement can only be driven by power applied to both ends, causing the shaft to move forward, backward, or up and down in a directional manner.

[0003] Common ball splines often use spline shafts and spline sleeves to perform reciprocating motion, mainly relying on the fit between the shaft with ball tracks and the ball nut, and applying power from both ends of the shaft.

[0004] However, the existing ball spline relies on the movement of the shaft and ball nut of the ball track, and can only use the two ends of the shaft for power. In actual application, external connectors are often encountered, and the power is not limited to the two ends. It is often necessary to add other components or replace and modify them, which increases the cost and workload. This design limitation restricts the widespread application of ball splines. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide a pulley bar steel ball spline device to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method including a spline shaft and a ball groove, wherein the outer wall of the spline shaft is respectively provided with a spline sleeve and a gear, and the ball groove is provided in multiple groups on the outer wall of the spline shaft, and the spline sleeve is provided with balls. The balls in the spline sleeve interact with the spline shaft, and the connecting part between the spline shaft and the spline sleeve performs linear motion. A limiting groove is provided on the outer wall of the spline shaft, and a rack is provided in the limiting groove, and the gear corresponds to the rack.

[0007] By adopting the above technical solution, the spline sleeve can achieve efficient and stable linear motion on the spline shaft. At the same time, when the ball rolls relative to the spline sleeve in the ball groove, the friction resistance can be greatly reduced, making the spline shaft move more smoothly. At the same time, it can also effectively reduce energy loss and improve transmission efficiency. The connecting part between the spline shaft and the spline sleeve moves linearly, which makes the connection between the spline shaft and the spline sleeve stable and reliable, prevents loose displacement during use, and thus ensures the normal operation of the ball spline. The design of the gear and rack provides more possibilities for flexible adjustment according to actual needs.

[0008] Furthermore, an axial center hole is provided in the spline shaft, and the cross section of the axial center hole is designed as a circular structure, and the axial center hole passes through both ends of the spline shaft.

[0009] By adopting the above technical solution, the design of the axial hole greatly reduces the weight of the spline shaft itself, reduces the load on the entire mechanism, increases the speed and reduces energy consumption. Of course, the axial hole can also be used as an air hole or as a signal line, which is both beautiful and space-saving.

[0010] Furthermore, a ball groove is provided on the outer wall of the spline shaft, and the ball groove is a straight groove.

[0011] By adopting the above technical solution, the balls in the spline sleeve fit into the ball grooves, ensuring that the balls can roll smoothly on the ball grooves. At the same time, the fit between the spline shaft and the spline sleeve is improved, thereby improving the assembly accuracy and performance of the ball spline.

[0012] Furthermore, two groups of ball grooves are symmetrically opened on the outer wall of the spline shaft, and the opening positions of the ball grooves correspond to the positions of the balls in the spline shaft sleeve.

[0013] By adopting the above technical solution, under the action of the same external force, there are more force fulcrums and the average force at each point is smaller, thereby effectively improving the load-bearing capacity and service life of the ball spline. During use, when the spline shaft slides in the spline sleeve, the balls in the ball grooves roll, reducing friction resistance and making the movement of the spline shaft smoother. Multiple groups of ball grooves can evenly share the pressure, reduce the wear of the balls, and further extend the service life of the ball spline.

[0014] Furthermore, a limiting groove is provided on the outer wall of the spline shaft, and the limiting groove runs through both ends of the spline shaft.

[0015] By adopting the above technical solution, the limit groove can accurately limit the axial movement range of the spline shaft relative to the spline sleeve, and at the same time prevent the gear from accidentally escaping from the spline shaft when the gear interacts with the rack, thereby ensuring the normal operation of the machine and the safety of the operator.

[0016] Furthermore, the rack is located in a limiting groove, and the limiting groove is a straight groove.

[0017] By adopting the above technical solution, the smooth operation of the gear and rack is ensured, the ball spline works within a safe range of motion, and the stability and reliability of the entire transmission system are enhanced.

[0018] Furthermore, the limiting groove is located at the top of the spline shaft, and the cross section of the limiting groove is designed to be concave.

[0019] By adopting the above technical solution, the mutual interference between the rack and the spline sleeve in the limit groove is avoided, the normal operation between the spline sleeve and the spline shaft is guaranteed, and at the same time, the gear and the rack can run smoothly, which further improves the smoothness of the ball spline operation and extends the service life of the ball spline.

[0020] Furthermore, the width of the gear corresponds to the width of the rack, and the gear is connected to the rack.

[0021] By adopting the above technical solution, the meshing method between the gear and the rack reduces energy loss during power transmission, efficiently converts power into linear motion of the rack, and maintains good performance within a certain speed range. It can provide relatively smooth power output during movement. The gear and rack connection method is relatively compact, which has great advantages in some equipment with limited space.

[0022] Furthermore, a gear groove is provided in the gear, and the shape of the gear groove is consistent with that of the precision gear.

[0023] By adopting the above technical solution, it is possible to load power at both ends of the spline shaft to drive the shaft to reciprocate, and it is also possible to add a gear cross-connected transmission device with the same gear and rack tooth shape to drive the spline shaft to reciprocate. Conversely, when the power of the spline shaft is at both ends of the spline shaft, at this time, while serving the reciprocating motion of the spline shaft, the cross gears connected by the rack function can also be used to drive another mechanism to operate, further improving the wide range of use of ball splines.

[0024] Furthermore, a sleeve is provided on the outer wall of the gear, and the sleeve passes through the gear.

[0025] By adopting the above technical solution, axial and radial forces are borne to a certain extent, preventing loosening and displacement during use, thereby ensuring the normal operation of the ball spline and enhancing the flexibility of the ball spline.

[0026] In summary, the present invention has the following beneficial effects:

[0027] The utility model is provided with a gear and a rack, so that the gear drives the rack, thereby driving the spline shaft to move, not only allowing power to be loaded at both ends of the spline shaft to drive the spline shaft to reciprocate, but also adding a gear cross-related transmission device with a precision gear and a rack tooth shape consistent to drive the shaft to reciprocate. Conversely, when the power of the shaft is at both ends of the shaft, it can serve the reciprocating motion of the shaft while also using the cross gears connected by the rack function to drive another mechanism to operate. At the same time, the spline shaft is also designed as a hollow hole, which greatly reduces the weight of the shaft itself, reduces the load on the overall mechanism, increases the speed and reduces energy consumption. Of course, the through hole can also be used as an air hole or as a signal line, which is both beautiful and saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0029] Figure 2 This is a front view structural diagram of the utility model;

[0030] Figure 3 This is a side structural diagram of the present utility model;

[0031] Figure 4 It is a perspective view of the cutaway plan of the present invention.

[0032] In the figure: 1, spline shaft; 101, axis hole; 102, ball groove; 103, limit groove; 2, rack; 3, spline shaft sleeve; 4, gear; 401, gear groove; 5, sleeve. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] The following describes an embodiment of the present invention based on its overall structure.

[0035] A pulley-strip steel ball spline device, such as Figure 1 - Figure 4 As shown, the ball spline mainly consists of a spline shaft 1, a gear 4 and a rack 2.

[0036] The ball grooves 102 are provided in multiple groups on the outer wall of the spline shaft 1, and balls are provided in the spline sleeve 3 to realize efficient and stable linear motion of the spline sleeve 3 on the spline shaft 1. The balls in the spline sleeve 3 interact with the spline shaft 1. At the same time, when the balls roll relative to the spline sleeve 3 in the ball grooves 102, the friction resistance can be greatly reduced, making the spline shaft 1 move more smoothly, and at the same time, it can effectively reduce energy loss and improve transmission efficiency.

[0037] At the same time, a spline sleeve 3 is sleeved on the outer wall of the spline shaft 1, and the connecting part between the spline shaft 1 and the spline sleeve 3 moves linearly, which ensures the stability and reliability of the connection between the spline shaft 1 and the spline sleeve 3. A limit groove 103 is provided on the outer wall of the spline shaft 1, and a rack 2 is provided in the limit groove 103, and the gear 4 corresponds to the rack 2, ensuring that when the rack 2 and the gear 4 are engaged and move, the spline shaft 1 can be driven to move back and forth. If the power is at both ends of the spline shaft 1, the rack 2 and the gear 4 can also use the gear groove 401 provided in the cross gear 4 connected by the function of the rack 2 to drive another mechanism to operate. The setting of the sleeve 5 can withstand axial and radial forces to a certain extent, preventing loose displacement during use, thereby ensuring the normal operation of the ball spline, and the design of the gear 4 and the rack 2 provides more possibilities for flexible adjustment according to actual needs.

[0038] See also Figure 1 An axial hole 101 is opened in the spline shaft 1, and the cross-section of the axial hole 101 is a circular structure design, and the axial hole 101 runs through both ends of the spline shaft 1. The design of the axial hole 101 greatly reduces the weight of the spline shaft 1 itself, reduces the load and speed of the overall mechanism, and reduces energy consumption. Of course, the axial hole 101 can also be used as an air hole or as a signal line, which is both beautiful and space-saving.

[0039] See also Figure 1 - Figure 3 A ball groove 102 is provided on the outer wall of the spline shaft 1, and the ball groove 102 is a straight groove. The balls provided in the spline sleeve 3 fit in the ball groove 102, ensuring that the balls can roll smoothly on the ball groove 102. At the same time, it also improves the fit between the spline shaft 1 and the spline sleeve 3, and improves the assembly accuracy and performance of the ball spline.

[0040] See also Figure 1 - Figure 4 Two groups of ball grooves 102 are symmetrically opened on the outer wall of the spline shaft 1, and the opening positions of the ball grooves 102 correspond to the positions of the balls in the spline sleeve 3. In actual implementation, when the spline shaft 1 and the spline sleeve 3 move, the balls in the spline sleeve 3 fit tightly with the ball grooves 102, and two groups of ball grooves 102 are symmetrically opened on the outer wall of the spline shaft 1 to form two groups of ball tracks. This design makes it possible to have more force fulcrums and smaller average force at each point under the same external force, thereby effectively improving the load-bearing capacity and service life of the ball spline. During use, when the spline shaft 1 slides in the spline sleeve 3, the balls in the ball grooves 102 roll, reducing frictional resistance and making the movement of the spline shaft 1 smoother. Multiple groups of ball grooves 102 can evenly share the pressure, reduce the wear of the balls, and further extend the service life of the ball spline.

[0041] See also Figure 1 - Figure 4 A limiting groove 103 is provided on the outer wall of the spline shaft 1, and the limiting groove 103 runs through both ends of the spline shaft 1. The limiting groove 103 can accurately limit the axial movement range of the spline shaft 1 relative to the spline shaft sleeve 3, and at the same time prevent the gear 4 from accidentally escaping from the spline shaft 1 when interacting with the rack 2, thereby ensuring the normal operation of the machine and the safety of the operator.

[0042] See also Figure 1 - Figure 4 The rack 2 is located in the limiting groove 103, and the limiting groove 103 is a straight groove, which ensures the smooth operation of the gear 4 and the rack 2, so that the ball spline works within a safe range of motion, thereby enhancing the stability and reliability of the entire transmission system.

[0043] See also Figure 1 and Figure 4 The limit groove 103 is located at the top of the spline shaft 1, and the cross-section of the limit groove 103 is designed to be concave, which avoids the mutual interference between the rack 2 and the spline sleeve 3 in the limit groove 103, ensures the normal operation between the spline sleeve 3 and the spline shaft 1, and at the same time makes the gear 4 and the rack 2 run smoothly, further improving the smoothness of the ball spline operation and extending the service life of the ball spline.

[0044] See also Figure 1 and Figure 4 The width of the gear 4 corresponds to the width of the rack 2, and the gear 4 is connected to the rack 2. The meshing method between the gear 4 and the rack 2 makes the energy loss during the power transmission process smaller, and efficiently converts the power into the linear motion of the rack 2. At the same time, it maintains good performance within a certain speed range, and can provide relatively smooth power output during the movement. The connection method of the gear 4 and the rack 2 is relatively compact, which has great advantages in some equipment with limited space.

[0045] See also Figure 1 and Figure 4 A gear groove 401 is provided in the gear 4, and the shape of the gear groove 401 is consistent with that of the precision gear. The design of the gear 4 and the gear groove 401 can not only load power at both ends of the spline shaft 1 to drive the shaft to reciprocate, but also add a gear 4 with the same tooth shape as the rack 2 to cross-link the transmission device to drive the spline shaft 1 to reciprocate. On the contrary, when the power of the spline shaft 1 is at both ends of the spline shaft 1, at this time, the spline shaft 1 can be served to reciprocate while the cross gear 4 connected by the rack 2 function can be used to drive another mechanism to operate, further improving the wide range of use of the ball spline.

[0046] See also Figure 1 and Figure 2A sleeve 5 is provided on the outer wall of the gear 4, and the sleeve 5 passes through the gear 4, which bears axial and radial forces to a certain extent, preventing loosening and displacement during use, thereby ensuring the normal operation of the ball spline and enhancing the flexibility of the ball spline.

[0047] The working principle of the present invention is as follows: when the ball spline is used, the spline shaft 1 starts to slide. Since the outer wall of the spline shaft 1 is provided with two sets of ball grooves 102, when the spline shaft 1 moves horizontally in the spline sleeve 3, the more ball grooves 102 there are, the more force fulcrums there are under the same external force, and the smaller the average force at each point, which makes its service life longer. At the same time, the ball grooves 102 provide a precise movement path for the balls, thereby ensuring the precise movement of the components connected thereto. The orderly rolling of the balls in the ball grooves 102 can make the movement more stable.

[0048] When the power is applied to both ends of the spline shaft 1, the spline shaft 1 moves in the spline sleeve 3, the ball groove 102 is subjected to force, and the balls in the spline sleeve 3 begin to roll in the ball groove 102. At this time, the rack 2 in the limit groove 103 is engaged with the gear 4. The movement of the spline shaft 1 can drive the rack 2 to move with it. The sleeve 5 restricts and penetrates it, and bears a certain axial force and radial force to prevent the gear 4 from loosening or displacement during the movement. That is, it drives the gear 4 to move. The spline shaft 1 reciprocates and causes another mechanism connected to the gear 4 to move.

[0049] When the power is on the gear 4, the gear 4 first rotates to drive the rack 2 to move. At this time, the gear groove 401 set in the gear 4 is associated with another mechanism connected to the gear 4. The sleeve 5 restricts and penetrates it, and withstands a certain axial force and radial force to prevent the gear 4 from loosening or displacement during the movement, which facilitates the normal operation of the ball spline, thereby driving the spline shaft 1 to reciprocate.

[0050] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A pulley steel ball spline device, comprising a spline shaft (1) and a ball groove (102), characterized in that: The outer wall of the spline shaft (1) is respectively provided with a spline sleeve (3) and a gear (4); the ball grooves (102) are provided in multiple groups on the outer wall of the spline shaft (1); balls are provided in the spline sleeve (3); the balls in the spline sleeve (3) interact with the spline shaft (1); the connecting portion between the spline shaft (1) and the spline sleeve (3) performs linear motion; a limiting groove (103) is provided on the outer wall of the spline shaft (1), and a rack (2) is provided in the limiting groove (103); the gear (4) corresponds to the rack (2).

2. A pulley-sprocket ball spline device according to claim 1, characterized in that: The spline shaft (1) is provided with an axial center hole (101), and the cross section of the axial center hole (101) is designed to be a circular structure, and the axial center hole (101) passes through both ends of the spline shaft (1).

3. The pulley-sprocket ball spline device according to claim 1, characterized in that: A ball groove (102) is provided on the outer wall of the spline shaft (1), and the ball groove (102) is a straight groove.

4. The pulley-sprocket ball spline device according to claim 1, characterized in that: Two groups of ball grooves (102) are symmetrically opened on the outer wall of the spline shaft (1), and the opening positions of the ball grooves (102) correspond to the positions of the balls in the spline shaft sleeve (3).

5. The pulley-sprocket ball spline device according to claim 1, characterized in that: The outer wall of the spline shaft (1) is provided with a limiting groove (103), and the limiting groove (103) passes through both ends of the spline shaft (1).

6. The pulley-sprocket ball spline device according to claim 1, characterized in that: The rack (2) is located in the limiting groove (103), and the limiting groove (103) is a straight groove.

7. The pulley-sprocket ball spline device according to claim 1, characterized in that: The limiting groove (103) is located at the top of the spline shaft (1), and the cross section of the limiting groove (103) is designed to be concave.

8. The pulley-sprocket ball spline device according to claim 1, characterized in that: The width of the gear (4) corresponds to the width of the rack (2), and the gear (4) is connected to the rack (2).

9. The pulley-sprocket ball spline device according to claim 1, characterized in that: A gear groove (401) is provided in the gear (4), and the shape of the gear groove (401) is consistent with that of a precision gear.

10. The pulley-sprocket ball spline device according to claim 1, characterized in that: A sleeve (5) is provided on the outer wall of the gear (4), and the sleeve (5) passes through the gear.

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