Ball screw locking device and ball screw

Abstract

Disclosed in the present invention is a ball screw locking device, comprising: a base, wherein a mounting groove is formed in the upper surface of the base, and the base is mounted on a lower connecting member connected to a screw; a support rod, wherein one end of the support rod is rotatably arranged in the mounting groove, an elastic member is arranged between the support rod and the bottom surface of the mounting groove, and the elastic member forces the other end of the support rod to extend out of the upper end surface of the base; and a ball plunger which is mounted on the end of the support rod extending out of the upper end surface of the base, wherein a ball body at the top of the ball plunger generates a supporting force upwards by means of a plunger spring, and the ball body is snap-fitted into slots in the lower end surface of an upper connecting member connected to a nut. Further disclosed is a ball screw provided with the ball screw locking device. The present invention can prevent the ball screw from rotating reversely and ensures transmission safety.

Description

Ball screw locking device and ball screw Technical Field

[0001] The invention relates to a ball screw locking device and a ball screw. Background Art

[0002] The ball screw is a high-precision transmission device. As shown in Figure 1, it consists of a screw 20', a nut 10', and a ball. It uses a rolling friction screw instead of a sliding friction screw. It has the advantages of high transmission efficiency, smooth transmission, low wear, long life, and high precision. Therefore, ball screws are widely used in various industrial equipment and precision instruments. Technical issues

[0003] However, the ball screws on the market are not provided with a self-locking device, and cannot achieve locking and positioning after the nut 10 ′ reaches the specified position during use, which may cause a spinning phenomenon and lead to an unsafe problem. Technical Solutions

[0004] In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a ball screw locking device and a ball screw that can prevent rotation and ensure transmission safety.

[0005] In order to achieve the above purpose, one of the technical solutions adopted by the present invention is: a ball screw locking device, comprising: a base, an upper surface of the base is provided with a mounting groove, and the base is installed on a lower connecting member connected to the screw; a support rod, one end of the support rod is rotatably set in the mounting groove, and an elastic member is provided between the support rod and the bottom surface of the mounting groove, and the elastic member forces the other end of the support rod to extend out of the upper end surface of the base; a ball head plunger, which is installed at the end of the support rod extending out of the upper end surface of the base, and the ball on the top of the ball head plunger generates an upward supporting force through the plunger spring, and the ball is stuck in the groove on the lower end surface of the upper connecting member connected to the nut.

[0006] Preferably, the elastic member is at least one spring.

[0007] Preferably, the end surfaces of the support rod corresponding to the mounting groove are respectively provided with latching grooves, and the upper and lower ends of the elastic member are respectively latched into the corresponding latching grooves.

[0008] Preferably, the bottom of the mounting groove close to the ball screw has a notch, and the ball plunger can move in the notch.

[0009] In order to achieve the above purpose, another technical solution adopted by the present invention is: a ball screw, including a nut and a screw, a plurality of balls are arranged between the nut and the screw, an upper connecting piece is provided on the upper end face of the nut, the outer side of the screw is connected to the lower connecting piece, and a ball locking device described in any one of the above items is provided between the upper connecting piece and the lower connecting piece, and multiple groups of grooves are provided on the lower end face of the upper connecting piece, and the multiple groups of grooves are distributed along the circumference of the lower surface of the upper connecting piece, and the ball on the top of the ball head plunger can be stuck in any groove.

[0010] Preferably, a handle is provided on the upper end surface of the upper connecting member to facilitate operators to rotate the nut.

[0011] Preferably, the ball locking device is provided with one, the lower connecting member is rectangular, and a limiting groove is provided on the upper end surface of one corner of the lower connecting member. The base of the ball locking device is fixed to the limiting groove by bolt locking. The setting of the limiting groove facilitates the ball locking device to quickly find the installation position. Beneficial effects

[0012] The beneficial effects of the ball screw locking device and the ball screw of the present invention are that the ball screw locking device is modularly arranged and can be installed conveniently and quickly; by adding the ball screw locking device to the ball screw, when the nut reaches the specified position, the ball head plunger contacts the upper connecting piece and its own internal spring to generate a supporting force, which cooperates with the slot of the upper connecting piece to achieve stopping, lock the position, and prevent the ball screw from rotating; adopting a rolling friction spiral method, the transmission efficiency is high, the transmission is smooth, the wear is small, the service life is long, and the precision is high; the structure is stable and simple, which improves the reliability and safety of the ball screw and can solve the problem that the ball screw cannot self-lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a perspective view of a ball screw according to the prior art.

[0014] FIG2 is a three-dimensional view of the first embodiment from a first angle.

[0015] FIG3 is a perspective view of the first embodiment from a second angle.

[0016] FIG4 is an exploded view of the first embodiment.

[0017] FIG5 is a perspective view of the second embodiment.

[0018] FIG6 is a front view of the second embodiment.

[0019] FIG7 is a three-dimensional view of the lower end surface of the upper connecting member in the second embodiment. Attached photos

[0020] 10', nut; 20', screw; 10, nut; 11, upper connecting piece; 12, slot; 13, handle; 21, lower connecting piece; 22, limit slot; 23, bolt; 30, ball screw locking device; 31, base; 32, mounting slot; 33, elastic member; 34, ball plunger; 34a, sphere; 35, slot; 36, notch; 37, positioning pin; 38, support rod. Modes for Carrying Out the Invention

[0021] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention. Example

[0022] 1 , the present embodiment discloses a ball screw locking device 30, which adopts a rolling friction screw instead of a sliding friction screw, and has the advantages of high transmission efficiency, smooth transmission, low wear, long service life, and high precision, etc., including: a base 31, an upper surface of the base 31 is provided with a mounting groove 32, and the base 31 is mounted on the lower connecting member 21 connected to the screw; a support rod 38, one end of which is rotatably set in the mounting groove 32 through a rotating shaft pin 37, and an elastic member 33 is provided between the support rod 38 and the bottom surface of the mounting groove 32, and the elastic member 33 forces the other end of the support rod 38 to extend out of the upper end surface of the base 31; a ball plunger 34, which is mounted on the end of the support rod 38 extending out of the upper end surface of the base 31, and the ball 34a on the top of the ball plunger 34 generates a supporting force upward through a plunger spring, and the ball 34a is clamped into the clamping groove 12 on the lower end surface of the upper connecting member 11 connected to the nut 10.

[0023] The elastic member 33 is at least one spring. One spring may be used. In this embodiment, two elastic members 33 are used to ensure that the elastic member 33 provides sufficient supporting force to the ball plunger 34 .

[0024] To facilitate spring retention, the support rod 38 has retaining grooves 35 on its end surface corresponding to the mounting slot 32. The upper and lower ends of the elastic member 33 are respectively retained within their corresponding retaining grooves 35. Since two springs are provided in this embodiment, two sets of retaining grooves 35 are provided on the end surface of the support rod 38 corresponding to the mounting slot 32.

[0025] When the ball screw locking device 30 moves, the ball plunger 34 will rotate with the support rod 38, that is, the ball plunger 34 will swing up and down with the support rod 38, and the ball plunger 34 passes through the support rod 38. Therefore, in this embodiment, there is a notch 36 at the bottom of the mounting groove 32 close to the ball screw, and the ball plunger 34 can move in the notch 36. Example

[0026] A ball screw comprises a nut 10 and a screw, with several balls arranged between the nut 10 and the screw. The balls replace the sliding friction spiral between the screw and the nut with a rolling friction spiral. An upper connecting member 11 is provided on the upper end face of the nut 10, and the outer side of the screw is connected to the lower connecting member 21 by a locating pin and a screw. A ball locking device 30 of the first embodiment is provided between the upper connecting member 11 and the lower connecting member 21. There are multiple groups of slots 12 on the lower end face of the upper connecting member 11, and each group of slots 12 has multiple slots 12. The multiple groups of slots 12 are distributed along the circumference of the lower surface of the upper connecting member 11. The ball 34a at the top of the ball plunger 34 can be inserted into any slot 12. The ball screw is widely used in various industrial equipment and precision instruments. The ball screw is provided with the ball screw locking device 30 of the first embodiment. The ball locking device 30 is added near the ball screw. The ball head plunger 34 of the ball locking device 30 contacts the upper connecting member 11 to generate friction, so as to prevent the ball screw from rotating due to the reverse force after reaching the specified position during use. This solves the problem that the ball screw cannot be locked when reaching the specified position, thereby improving the safety, practicality, safety and convenience of the ball screw during use.

[0027] In order to facilitate the rotation of the nut 10, the upper end surface of the upper connecting member 11 in this embodiment is provided with a handle 13. When the nut 10 is rotated by the handle 13, the nut 10 can be easily rotated to produce displacement, and the transmission of the structural member is stable and the displacement accuracy is high.

[0028] The ball locking device 30 is provided with a lower connecting member 21 which is rectangular. A limiting groove 22 is provided on the upper end surface of one corner of the lower connecting member 21 . The base 31 of the ball locking device 30 is locked and fixed on the limiting groove 22 by a bolt 23 .

[0029] The upper connecting piece 11 can rotate, and the nut 10 moves up and down, realizing the up and down movement of the pressure head inside the lower connecting piece 21. The ball locking device 30 contacts the upper connecting piece 11 and generates friction. The elastic part 33 inside the ball locking device 30 will be compressed and will also generate an upward supporting force. After the chip test cover reaches the working state, the nut 10 is locked. At this time, the ball locking device 30 cooperates with the slot 12 of the upper connecting piece 11 to prevent the ball screw from rotating, thereby improving the safety and reliability of the ball screw during use. Industrial Applicability

[0030] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ball screw locking device (30), characterized in that, Including: A base (31), on the upper surface of which there is an installation groove (32), and the base (31) is installed on a lower connecting member (21) connected to a screw rod; A support rod (38), one end of which is rotatably arranged in the installation groove (32), and an elastic member (33) is arranged between the support rod (38) and the bottom surface of the installation groove (32), and the elastic member (33) forces the other end of the support rod (38) to extend out of the upper end surface of the base (31); A ball plunger (34), installed at the end of the support rod (38) extending out of the upper end surface of the base (31), and a sphere (34a) at the top of the ball plunger (34) generates an upward supporting force through a plunger spring, and the sphere (34a) is clamped into a clamping groove (12) on the lower end surface of an upper connecting member (11) connected to a nut (10).

2. The ball screw locking device (30) according to claim 1, characterized in that: The elastic member (33) is at least one spring.

3. The ball screw locking device (30) according to claim 1, characterized in that: Positioning grooves (35) are respectively arranged on the end surfaces of the support rod (38) corresponding to the installation groove (32), and the upper and lower ends of the elastic member (33) are respectively clamped into the corresponding positioning grooves (35).

4. The ball screw locking device (30) according to claim 1, characterized in that: The bottom of the installation groove (32) close to the ball screw has a notch (36), and the ball plunger (34) can move in the notch (36).

5. A ball screw, comprising a nut (10) and a screw rod, wherein a plurality of balls are arranged between the nut (10) and the screw rod, and it is characterized in that: An upper connecting member (11) is arranged on the upper end surface of the nut (10), the outer side of the screw rod is connected to a lower connecting member (21), and a ball locking device (30) according to any one of claims 1-4 is arranged between the upper connecting member (11) and the lower connecting member (21). A plurality of groups of clamping grooves (12) are arranged on the lower end surface of the upper connecting member (11), and the plurality of groups of clamping grooves (12) are distributed along the circumference of the lower surface of the upper connecting member (11), and the sphere (34a) at the top of the ball plunger (34) can be clamped into any one of the clamping grooves (12).

6. The ball screw locking device (30) according to claim 5, characterized in that: A handle (13) is arranged on the upper end surface of the upper connecting member (11).

7. The ball screw according to claim 5 or 6, characterized in that: One ball locking device (30) is provided, the lower connecting member (21) is rectangular, and a limiting groove (22) is arranged on the upper end surface of one of the corners of the lower connecting member (21), and the base (31) of the ball locking device (30) is locked and fixed on the limiting groove (22) through a bolt (23).

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