Assembly device for internal circulation type ball screw

Abstract

The utility model relates to the technical field of ball screws, in particular to an assembling device of an internal circulation type ball screw, the internal circulation type ball screw comprises a circulator, a lead screw, a steel ball and a nut, the nut is arranged on the lead screw in a sleeving mode, a spiral channel for the steel ball to roll is formed between the nut and the lead screw, and the circulator is arranged on the inner side wall of the nut; a circulating channel communicating with the spiral channel is formed in the circulator, the circulator mounting assembly comprises an adsorption part and a fixing assembly, the adsorption part is used for adsorbing the circulator, and the fixing assembly is used for fixing the relative position between the adsorption part and the nut; the assembling column can be inserted into the nut, and a ball guide curved surface is arranged on the outer side wall of one end of the assembling column. The circulator is fixed to the inner side wall of the nut through an adsorption means, rapid mounting and dismounting of the circulator are achieved, the assembling procedure is omitted, the assembling column is arranged, the steel balls of one circulation circle number can be rapidly filled at a time, and the ball screw assembling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball screw, in particular to an assembly device for internal circulation type ball screw. BACKGROUND

[0002] With the continuous improvement of industrialization level, ball screw is more and more widely used, and a typical ball screw pair is composed of a screw, a nut, a ball and a circulating device. The main function is to convert rotary motion into linear motion, or to convert torque into axial repeated force, while having the characteristics of high precision, reversibility and high efficiency.

[0003] The internal circulation type ball screw embeds the circulating device on the inner side wall of the nut. When installing the ball, the circulating device is easy to move or fall off, which causes the ball to need to be assembled repeatedly, seriously affecting the installation efficiency of the ball.

[0004] In the existing assembly process, the internal circulation part is connected to the nut by other sticky objects to complete the assembly, which inevitably leaves sticky objects on the surface of the nut and needs to be cleaned after assembly, resulting in complicated assembly process. And the existing assembly technology is that the assembly technician assembles through a simple sleeve. During the assembly process, especially for the internal circulation type ball screw with multiple circulation turns, the circulating part needs to be adjusted frequently during the assembly process. The assembly process is complicated, the process is complicated, the ball can only be installed in a few at a time, and the assembly efficiency is not ideal, especially for the nut with small inner diameter, the ball installation is particularly difficult. CONTENT OF THE INVENTION

[0005] The technical problem to be solved by the present application is that the existing roller screw assembly process is complex and the assembly efficiency is low.

[0006] Therefore, the present application provides an assembly device for internal circulation type ball screw.

[0007] The technical scheme adopted by the present application to solve its technical problem is:

[0008] An assembly device for internal circulation type ball screw is used to assemble the internal circulation type ball screw. The internal circulation type ball screw includes a circulating device, a screw, a ball and a nut. The nut is sleeved on the screw and forms a spiral channel for the ball to roll between the nut and the screw. The circulating device is arranged on the inner side wall of the nut. The inner side wall of the nut is provided with a mounting groove for embedding the circulating device. The circulating device is provided with a circulating channel communicating with the spiral channel. The assembly device comprises,

[0009] The circulating device mounting assembly comprises a suction accessory and a fixing assembly. The suction accessory is used to suck the circulating device, and the fixing assembly is used to fix the relative position between the suction accessory and the nut.

[0010] An assembling column is axially inserted into a nut along a nut axis, an outer side wall of one end of the assembling column is provided with a guide ball curve, when the assembling column is inserted into the nut, an outer edge of the guide ball curve is opposite to an edge of a spiral groove on the nut.

[0011] Further, the fixing assembly comprises an adjusting member and a support plate, a through hole is formed in the nut and communicates with the mounting groove, a cross-sectional area of the through hole is smaller than that of the mounting groove, the adjusting member penetrates through the through hole, the suction member is connected to one end of the adjusting member extending into the through hole, and the support plate is located on the outer side of the nut and can move towards or away from the suction member.

[0012] Further, an outer side wall of the adjusting member is provided with a thread, and the support plate is threadedly connected to the adjusting member.

[0013] Further, the suction member is a magnet.

[0014] Further, the circulator mounting assembly further comprises a lifting ring, and a plurality of the circulator mounting assemblies are provided, and the lifting rings of the plurality of the circulator mounting assemblies are connected by a rope.

[0015] Further, the rope is elastic.

[0016] Further, an outer diameter d of the assembling column is smaller than an inner diameter d1 of the nut, and the outer diameter d of the assembling column is not smaller than a bottom diameter d2 of the lead screw, and d2≤d<d1.

[0017] Further, the guide ball curve comprises a nut groove center portion curve and a circulator component groove portion center curve, and the nut groove center portion curve and the circulator component groove portion center curve are in communication with each other to form a closed circulation curve.

[0018] Further, an end of the assembling column provided with the guide ball curve is connected with a boss, the guide ball curve is located on the outer side of the boss, a circular arc chamfer is arranged between the guide ball curve and the outer side wall of the assembling column, and a circular arc chamfer is arranged at the connection between the boss and the assembling column.

[0019] Further, one end of the assembling column away from the boss is hollow, and an inner diameter of the assembling column is not smaller than a diameter of the supporting portion of the lead screw.

[0020] The utility model discloses beneficial effect is, the application is fixed in the nut inner wall through magnetism adsorption etc. Means circulating device, thereby avoid the circulating device to move in the steel ball installation process, influence installation efficiency, and the circulating device installation assembly structure can realize the quick installation and disassembly of circulating device, and disassembly complete nut surface no residual object, omit the process of removing residual object. And through the scheme that the support plate is screwed on the adjusting piece, the device can be used for the assembly of any circulating device hole depth internal circulating component. The application can quickly complete one circulating number steel ball at a time through the setting of the assembling column, thereby improving the assembly efficiency of the ball screw. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model is further described below in combination with the drawings and examples.

[0022] Figure 1 It is the installation relation schematic diagram between circulating device installation assembly and nut in the utility model.

[0023] Figure 2 It is the structure schematic diagram of circulating device installation assembly in the utility model.

[0024] Figure 3 It is the structure schematic diagram of the suction accessory in the utility model.

[0025] Figure 4 It is the structure schematic diagram of the position relation of assembling column and boss in the utility model.

[0026] Figure 5 It is the structure schematic diagram of assembling column in the utility model.

[0027] Figure 6 It is the structure schematic diagram of the steel ball of assembling column installation in the utility model.

[0028] Figure 7 It is the schematic diagram of one circulating number steel ball in the utility model.

[0029] In the drawing: 1, nut;11, through -opening;2, screw;3, circulating device;4, circulating device installation assembly;41, adjusting piece;42, support plate;43, suction accessory;44, lifting ring;45, rope body;5, assembling column;51, boss;52, guide ball curve. DETAILED DESCRIPTION

[0030] The utility model will be further described in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic manner, therefore it only shows the relevant constitution of the utility model.

[0031] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0032] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] The inner circulating type ball screw comprises a circulator 3, a screw rod 2, a steel ball and a nut 1, one end of the screw rod 2 is provided with a supporting portion with an outer diameter smaller than that of the screw rod 2, a spiral channel for the steel ball to roll is formed between the screw rod 2 and the nut 1, the circulator 3 is arranged on the inner side wall of the nut 1, the inner side wall of the nut 1 is provided with a mounting groove for embedding the circulator 3, and the circulator 3 is provided with a circulating channel communicated with the spiral channel.

[0034] An assembling device of an inner circulating type ball screw, comprising a circulator mounting assembly 4 and an assembling column 5, referring to Figure 1 The circulator mounting assembly 4 is used for fixing the circulator 3 on the inner side wall of the nut 1 when the steel ball is mounted, and the assembling column 5 is used for mounting the steel ball into the circulating channel.

[0035] Referring to Figure 2 , 3The circulator mounting assembly 4 comprises a fixing assembly and a suction accessory 43, the fixing assembly comprises an adjusting piece 41 and a support plate 42, the outer side wall of the adjusting piece 41 is provided with threads, the support plate 42 is threadedly connected to the adjusting piece 41, one end of the adjusting piece 41 is connected with the suction accessory 43, and the other end is connected with a lifting ring 44, the suction accessory 43 is used for sucking the circulator 3, in the embodiment, the circulator 3 is of a metal material with magnetism, and the suction accessory 43 is a strong magnet, and in other embodiments, the suction accessory 43 can also be a vacuum nozzle.

[0036] The side wall of the nut 1 is provided with a through opening 11 in communication with the mounting groove, the circulator 3 cannot pass through the through opening 11, the end of the adjusting piece 41 connected with the strong magnet is inserted into the through opening 11 to suck the circulator 3, and the support plate 42 is located on the outer side of the nut 1. Rotating the support plate 42 makes the support plate 42 abut against the outer side wall of the nut 1, so as to adapt to the nut 1 with different wall thicknesses, thereby the adjusting piece 41 sucks the circulator 3, the circulator 3 is tightly pulled and fixed in the mounting groove, and displacement of the circulator 3 during installation of the steel ball is avoided.

[0037] For the inner circulating ball screw 2, the market share of the multiple circulating turns is larger. Each column of circulation needs a circulating component to change the running track of the steel ball to form a closed running track, so that the circulators 3 are provided in the multiple circulating turns of the inner circulating ball screw 2, the number of the circulator mounting assemblies 4 is matched with the number of the circulators 3, and through the lifting ring 44, the circulator mounting assemblies 4 of each circulator 3 can be connected together through a rope body 45. Preferably, the rope body 45 has elasticity and large elastic deformation, and the elastic force generated by the elastic deformation makes the rope body 45 closely adhere to the outer circle of the nut 1, so as to avoid interference with other operations during operation.

[0038] Referring to Figure 4 , the assembly column 5 is provided as a column body, the assembly column 5 is axially inserted into the nut 1 along the nut 1, as shown in Figure 5 , the outer diameter d of the assembly column 5 is smaller than the inner diameter d1 of the nut 1, and the outer diameter d of the assembly column 5 is not less than the bottom diameter d2 of the screw 2, that is, d2≤d<d1, so that the steel ball does not fall out of the channel of the nut 1 after being loaded into the spiral channel.

[0039] The outer side wall of one end of the assembly column 5 is provided with a ball guide curve 52, and the end is further welded with a boss 51 with a diameter smaller than the inner edge of the ball guide curve 52 on the assembly column 5. The ball guide curve 52 comprises a nut 1 channel center curve and a circulating component channel center curve, and the two form a closed circulating curve. The curve boundary designed in this way corresponds to an entire circulating track. Further, the ball guide curve 52 and the outer side wall of the assembly column 5 are provided as a circular arc chamfer, and the boss 51 is provided to prevent the steel ball from rolling irregularly in the ball guide curve 52. As shown in Figure 4As shown, the connection between the boss 51 and the assembly column 5 is rounded, forming an inclined curved surface, providing guidance for the smooth entry of the steel ball into the spiral channel, so that the steel ball can smoothly enter the channel towards the spiral channel.

[0040] It should be noted that, as Figure 5 shown, the assembly column 5 is hollow at the end away from the boss 51, and the inner diameter is not less than the diameter of the support part of the lead screw 2, facilitating the smooth rotation of the assembled nut 1 into the lead screw 2 shaft. The axial length of the assembly column 5 is 1.5 times the length of the nut 1, facilitating hand holding.

[0041] The implementation principle of the present application is:

[0042] First, insert the adjusting member 41 into the opening 11, and use the strong magnet on the adjusting member 41 to attract the circulator 3, then rotate the support plate 42 until the support plate 42 is tightly against the outer side wall of the nut 1, and fix the circulator 3 in the mounting groove.

[0043] Then insert the assembly column 5 into the nut 1 from one end of the nut 1, refer to Figure 6 , the arrow direction is the insertion direction of the assembly column 5, first make the outer edge of the guide ball curved surface 52 opposite to the edge of the channel closest to the insertion end of the assembly column 5, and then put the steel ball through the gap between the boss 51 and the inner wall of the nut 1, and the steel ball rolls into the spiral channel and the circulation channel along the guide ball curved surface 52. After adjusting the position of the assembly column 5, it is not necessary to constantly rotate to complete the installation of a whole cycle number of steel balls (refer to Figure 7 ). After completing the installation of a cycle track using the above method, move the assembly column 5 towards the other end of the nut 1 to the next cycle channel that needs to be installed, and so on, until all the steel balls are installed. In this process, the lead screw 2 is inserted into the hollow end of the assembly column 5 through its support part, and enters the nut 1 together with the assembly column 5. During the installation of the steel balls, the lead screw 2 is rotated into the nut 1 to complete the assembly between the lead screw 2 and the nut 1

[0044] In actual application, there will be errors in the nut 1 channel and the lead screw 2 shaft channel. Generally, after installing a whole cycle number of steel balls, several steel balls need to be removed to prevent the lead screw 2 from being stuck or even stopped during operation. The space between the boss 51 and the inner circle of the nut 1 can also facilitate the removal of the steel balls to be removed, and the dynamic installation of the steel balls can be observed at any time.

[0045] In summary, the application fixes the circulating device 3 by adsorbing the circulating device 3 through the adsorption accessory 43 and adjusting the distance between the supporting plate 42 and the adsorption accessory 43, so as to be suitable for the assembly of the inner circulating component with different wall thickness of the nut 1. The circulating device 3 is fixed on the inner side wall of the nut 1 through adsorption, which can realize quick installation and removal of the circulating device installation assembly 4, and no residue is generated on the surface of the nut 1 after removal, thereby saving the overall process of ball screw assembly, and the circulating device installation assembly 4 can be reused. The setting of the assembly column 5 can quickly and one-time complete the installation of a circulating number of steel balls, thereby improving the assembly efficiency of the ball screw.

[0046] The above is the ideal embodiment of the present application, and the above description can be changed and modified without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined by the scope of the claims.

Claims

1. An assembly device for an inner circulation type ball screw, the inner circulation type ball screw comprising a circulator (3), a screw shaft (2), a ball, and a nut (1) which is fitted on the screw shaft (2) and has a helical groove for the ball to roll thereon, the circulator (3) being provided on an inner side wall of the nut (1), the inner side wall of the nut (1) having a mounting groove for the circulator (3) to be embedded therein, and the circulator (3) having a circulation groove therein which communicates with the helical groove, characterized in that, The application relates to a circulating device mounting assembly (4) comprising a suction accessory (43) for sucking a circulating device (3) and a fixing assembly for fixing the relative position between the suction accessory (43) and a nut (1). The assembly column (5) is axially inserted into the nut (1), and a guide ball curved surface (52) is arranged on the outer side wall of one end of the assembly column (5); when the assembly column (5) is inserted into the nut (1), the outer edge of the guide ball curved surface (52) is opposite to the edge of the spiral groove on the nut (1). The fixing assembly comprises an adjusting piece (41) and a supporting plate (42); a through hole (11) communicating with the mounting groove is arranged on the nut (1); the adjusting piece (41) penetrates through the through hole (11); the suction accessory (43) is connected to one end of the adjusting piece (41) extending into the through hole (11); and the supporting plate (42) is located on the outer side of the nut (1) and can move towards or away from the suction accessory (43).

2. The assembly apparatus of an internal circulation type ball screw according to claim 1, wherein A thread is arranged on the outer side wall of the adjusting piece (41), and the supporting plate (42) is threadedly connected to the adjusting piece (41).

3. The assembly device of an internally circulating ball screw according to claim 2, wherein The suction accessory (43) is a magnet.

4. The assembly apparatus of an internal circulation type ball screw according to claim 1, wherein The circulating device mounting assembly (4) further comprises a lifting ring (44), and a plurality of circulating device mounting assemblies (4) are arranged; the lifting rings (44) of the plurality of circulating device mounting assemblies (4) are connected by a rope (45).

5. The assembly apparatus of an internally circulating ball screw according to claim 1, wherein The rope (45) is elastic.

6. The assembly apparatus of an internally circulating ball screw according to claim 5, wherein The outer diameter d of the assembly column (5) is smaller than the inner diameter d1 of the nut (1), and the outer diameter d of the assembly column (5) is not smaller than the bottom diameter d2 of the lead screw (2), and d2<=d<d1.

7. The assembly apparatus of an internally circulating ball screw according to claim 1, wherein The guide ball curved surface (52) comprises a nut (1) groove center part curved surface and a circulating component groove part center curved surface, and the nut (1) groove center part curved surface and the circulating component groove part center curved surface are communicated with each other to form a closed circulating curved surface.

8. The assembly device of an internally circulating ball screw according to claim 7, wherein The end of the assembly column (5) provided with the guide ball curved surface (52) is connected with a boss (51), the guide ball curved surface (52) is arranged on the outer side of the boss (51), a circular arc chamfer is arranged between the guide ball curved surface (52) and the outer side wall of the assembly column (5), and a circular arc chamfer is arranged at the connecting position between the boss (51) and the assembly column (5).

9. The assembly device for an internally circulating ball screw according to claim 8, wherein The end of the assembly column (5) away from the boss (51) is hollow, and the inner diameter of the assembly column (5) is not smaller than the diameter of the supporting part of the lead screw (2).

10. The assembly apparatus of an internally circulating ball screw according to claim 1, wherein ​

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