Retainer type ball screw

Abstract

The utility model discloses a retainer type ball screw. The retainer type ball screw comprises a screw rod, a nut, a retainer and steel balls, the screw rod is sleeved with the nut, a frame groove is formed in the nut, the screw rod is sleeved with the retainer, the retainer is located in the frame groove, a threaded groove is formed in the screw rod, ball holes are formed in the retainer, the ball holes are arranged corresponding to the path of the threaded groove, steel balls are arranged in the ball holes, and the steel balls are partially located in the threaded groove. The retainer is arranged between the screw rod and the nut in a sleeved mode, the steel balls are positioned through the retainer, when the screw rod rotates, the steel balls rotate in the ball holes in the retainer, the nut moves on the screw rod, the nut does not need to be punched to install a reverser, the structure is simpler, the production cost is reduced, and the production efficiency of the ball screw is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screws, in particular to a retaining frame type ball screw. Background Art

[0002] The ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotational motion into linear motion, or convert torque into axial repetitive force, while having the characteristics of high precision, reversibility and high efficiency. Due to its very small friction resistance, ball screws are widely used in various industrial equipment and precision instruments. The ball screw in the existing technology is composed of a screw, a nut, a steel ball, a pre-loaded plate, a deflector, and a dust collector. The deflector realizes the circulation of the steel ball. The installation of the deflector requires drilling a hole in the nut first. The diameter of the hole must match the deflector. Then the deflector is installed in the hole, which makes the production of the nut difficult and affects the production efficiency of the ball screw. Summary of the Invention

[0003] According to an embodiment of the present utility model, a cage-type ball screw is provided, comprising: a screw, a nut, a cage and steel balls;

[0004] The nut is sleeved on the screw, a frame groove is provided on the nut, the retaining frame is sleeved on the screw and located in the frame groove, the screw has a thread groove, a ball hole is provided on the retaining frame, the ball holes are arranged corresponding to the path of the thread groove, a steel ball is provided in the ball hole, and the steel ball is partially located in the thread groove.

[0005] Furthermore, a baffle is provided on the inner side of the nut, the baffle is threadedly connected to the screw, and the baffle is located at one end of the retaining frame.

[0006] Furthermore, a clamping plate is threadedly connected to the screw rod, a portion of the clamping plate is located in the frame groove, the clamping plate abuts against one end of the retaining frame, and the clamping plate is connected to the nut.

[0007] Furthermore, a sealing layer is provided at one end of the nut, and the sealing layer is threadably connected to the screw.

[0008] According to a retainer-type ball screw of an embodiment of the utility model, the retainer of the present application is arranged between the screw and the nut, and the steel ball is positioned by the retainer. When the screw rotates, the steel ball rotates in the ball hole on the retainer, causing the nut to move on the screw. There is no need to drill a hole on the nut to install a reverser, the structure is simpler, the production cost is reduced, and the production efficiency of the ball screw is improved.

[0009] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of a cage-type ball screw according to an embodiment of the present utility model;

[0011] Figure 2 It is a front view of a cage-type ball screw according to an embodiment of the utility model;

[0012] Figure 3 2 is a cross-sectional view of a cage-type ball screw according to an embodiment of the present utility model;

[0013] Figure 4 The figure is a structural diagram of a cage-type ball screw cage according to an embodiment of the present utility model.

[0014] Reference numerals in the figure are: 1 is a screw, 2 is a nut, 3 is a retaining frame, 4 is a steel ball, 5 is a baffle, 6 is a clamping plate, and 7 is a sealing layer. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to further illustrate the present invention.

[0016] First, combine Figures 1 to 4 A cage-type ball screw according to an embodiment of the present invention is described, which is a transmission element most commonly used in tool machinery and precision machinery.

[0017] like Figures 1 to 4 As shown, a retainer 3-type ball screw according to an embodiment of the present invention comprises: a screw 1, a nut 2, a retainer 3 and a steel ball 4;

[0018] The nut 2 is sleeved on the screw 1, and a frame groove is provided on the nut 2. The retaining frame 3 is sleeved on the screw 1 and is located in the frame groove. The screw 1 has a thread groove, and a ball hole is provided on the retaining frame 3. The ball holes are arranged corresponding to the path of the thread groove. A steel ball 4 is provided in the ball hole, and part of the steel ball 4 is located in the thread groove.

[0019] The retainer 3 is sleeved between the screw 1 and the nut 2, and the steel ball 4 is positioned by the retainer 3. When the screw 1 rotates, the steel ball 4 rotates in the ball hole on the retainer 3, so that the nut 2 moves on the screw 1. There is no need to drill a hole on the nut 2 to install a reverser, which makes the structure simpler, reduces production costs, and improves the production efficiency of the ball screw.

[0020] like Figure 3As shown, a baffle 5 is provided on the inner side of the nut 2, and the baffle 5 is threadedly connected to the screw 1. The baffle 5 is located at one end of the retaining frame 3. A clamping plate 6 is threadedly connected to the screw 1, and a portion of the clamping plate 6 is located in the frame groove. The clamping plate 6 abuts against one end of the retaining frame 3 and is connected to the nut 2.

[0021] The clamping plate 6 is pressed against one end of the retaining frame 3 to fix the retaining frame 3 between the baffle 5 and the clamping plate 6, thereby preventing the retaining frame 3 from shaking when the nut 2 moves, thereby preventing the retaining frame 3 from shaking and causing noise due to collision. The clamping plate 6 can prevent debris from entering the thread groove.

[0022] like Figure 3 As shown, a sealing layer 7 is provided at one end of the nut 2 , and the sealing layer 7 is threadedly connected to the screw 1 .

[0023] The sealing layer 7 seals one end of the nut 2 to prevent debris from entering the nut 2 and ensure the normal operation of the ball screw.

[0024] Above, refer to Figures 1 to 4 A retainer 3-type ball screw according to an embodiment of the utility model is described. The retainer 3 is arranged between the screw 1 and the nut 2. The steel ball 4 is positioned by the retainer 3. When the screw 1 rotates, the steel ball 4 rotates in the ball hole on the retainer 3, so that the nut 2 moves on the screw 1. There is no need to drill a hole on the nut 2 to install a reverser. The structure is simpler, the production cost is reduced, and the production efficiency of the ball screw is improved.

[0025] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0026] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A cage-type ball screw, characterized in that: include: Screws, nuts, cages and balls; The nut is sleeved on the screw, a frame groove is provided on the nut, the retaining frame is sleeved on the screw and located in the frame groove, the screw has a thread groove, a ball hole is provided on the retaining frame, the ball holes are arranged corresponding to the path of the thread groove, a steel ball is provided in the ball hole, and the steel ball is partially located in the thread groove.

2. A cage-type ball screw according to claim 1, characterized in that: A baffle is provided on the inner side of the nut, the baffle is threadedly connected to the screw, and the baffle is located at one end of the retaining frame.

3. A cage-type ball screw according to claim 1, characterized in that: A clamping plate is threadedly connected to the screw rod, a portion of the clamping plate is located in the frame groove, the clamping plate abuts against one end of the retaining frame, and the clamping plate is connected to a nut.

4. A cage-type ball screw according to claim 1, characterized in that: One end of the nut is provided with a sealing layer, and the sealing layer is threadedly connected to the screw.

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