Ejector mechanism driven by ball screw pair

Abstract

This application relates to an ejection mechanism driven by a ball screw pair and belongs to the field of ball screws. It includes a housing. A rotating ring is rotatably connected to the housing. The housing is disc-shaped. A first annular groove is formed inside the housing. A first gear is formed on the rotating ring. A connection hole is formed on the housing. The connection hole communicates with the first annular groove. A motor is arranged on the housing. The motor is connected with a second gear. One side of the second gear extends into the connection hole and meshes with the first gear. At least two rotating rods are arranged on the rotating ring. A fixing component for restricting the nut from falling off the rotating rod is arranged on the rotating rod. A control handle for controlling the motor and the fixing component is arranged on the housing. A first through hole is formed on the housing. The screw rod passes through the rotating ring and the first through hole. This application has the effect of replacing the manual method of removing the nut and quickly removing the nut from the screw rod.

Description

Technical Field

[0001] This application relates to the technical field of ball screws, and in particular to an ejection mechanism driven by a ball screw pair. Background Art

[0002] A common ball screw is an ideal product for converting rotary motion into linear motion or vice versa.

[0003] A ball screw consists of a screw rod, a nut, steel balls, preloading sheets, a reverse device, and a dust protector. Its function is to convert rotary motion into linear motion, which is a further extension and development of an Acme screw. The significance of this development is to change the bearing from a sliding action to a rolling action.

[0004] Regarding the above related technologies, before leaving the factory, the nut needs to be sleeved on the screw rod and rotated in sequence to detect whether the nut and the steel balls are qualified. When removing the nut, it is usually manually turned out by hand. Since the screw rod and the nut are contaminated with lubricating oil and the screw rod is relatively long, when removing the screw rod, the worker's hands will be covered with lubricating oil, which affects the worker's performance of other tasks, and it is not convenient to quickly remove the nut manually. Summary of the Invention

[0005] In order to replace the manual method of removing the nut and quickly remove the nut from the screw rod, this application provides an ejection mechanism driven by a ball screw pair.

[0006] An ejection mechanism driven by a ball screw pair provided in this application adopts the following technical solutions:

[0007] An ejection mechanism driven by a ball screw pair includes a housing. A rotating ring is rotatably connected to the housing. The housing is in a disc shape. A first annular groove is formed in the housing. A first gear is formed on the rotating ring. A connection hole is formed in the housing, and the connection hole communicates with the first annular groove. A motor is provided on the housing. The motor is connected with a second gear. One side of the second gear extends into the connection hole and meshes with the first gear. At least two rotating rods are provided on the rotating ring. A fixing component for restricting the nut from falling off the rotating rod is provided on the rotating rod. A control handle for controlling the motor and the fixing component is provided on the housing. A first through hole is formed in the housing, and the screw rod passes through the rotating ring and the first through hole.

[0008] By adopting the above technical solution, the rotating rod is rotated through the through hole on the screw head, and then the fixing assembly is positioned on the rotating rod. At the same time, the screw passes through the first through hole and the rotating ring. Then the control handle controls the motor to rotate, the motor drives the second gear to rotate, the second gear drives the first gear to rotate, the first gear drives the rotating ring to rotate, the rotating ring drives the rotating rod to rotate, and the rotating rod drives the nut to rotate. The user holds the control handle and pushes it along the length direction of the screw to push the nut out of the screw. Then the control handle releases the fixing assembly to disengage the nut from the control handle, thereby replacing the manual method of removing the nut and allowing the nut to be quickly removed from the screw.

[0009] Optionally, an annular block is provided on the shell, a second annular groove is provided on the rotating ring, and the annular block is located in the second annular groove.

[0010] By adopting the above technical solution, the rotational connection between the shell and the rotating ring is achieved.

[0011] Optionally, the fixing assembly includes two first limit blocks and two second limit blocks, one end of the first limit block is rotatably arranged in the rotating rod, and the other end extends out of the rotating rod, the screw head of the nut is located between the two first limit blocks, a torsion spring is arranged on the hinge axis of the first limit block and the rotating rod, the second limit block corresponds to and abuts against the first limit block one by one, the second limit block abuts against the side of the first limit block away from the rotating ring, a moving rod is slidably arranged in the rotating rod, two connecting rods are hinged on the moving rod, the connecting rod corresponds to and abuts against the second limit block one by one, a positioning block is arranged in the shell for limiting the movement of the second limit block along the length direction of the rotating rod, and a driving member for controlling the sliding of the moving rod is arranged in the connecting rod.

[0012] By adopting the above technical solution, the control handle controls the driving member to start, the driving member drives the moving rod to move, the moving rod drives the connecting rod to move and pulls the second limit block to separate from the first limit block. At this time, the torsion spring restores to its natural state and drives the first limit block to flip into the rotating rod. Then, the rotating rod passes through the screw head and then controls the moving rod to reset. The moving rod drives the connecting rod to move, and the second limit block pushes the first limit block out of the rotating rod again to limit the screw head and prevent the nut from separating from the rotating rod during the removal process.

[0013] Optionally, the driving member includes a support rod, an electromagnet and an armature, the electromagnet is fixed on the support rod, the armature is slidably arranged on the support rod, a spring is sleeved on the support rod, one end of the spring is connected to the electromagnet, the other end of the spring is connected to the armature, the armature is connected to the moving rod, and the control handle controls the power on and off of the electromagnet.

[0014] By adopting the above technical solution, when the control handle controls the electromagnet to be energized, the electromagnet adsorbs the armature, the armature drives the moving rod to move, the moving rod drives the connecting rod to move, so that the second limiting block is separated from the first limiting block. When the electromagnet is de-energized, the spring drives the armature to reset, causing the moving rod to drive the connecting rod to move, and the connecting rod pushes the second limiting block to move, and the second limiting block ejects the first limiting block out of the connecting rod.

[0015] Optionally, a pull rod is arranged on the armature, and the pull rod is connected to the moving rod.

[0016] Optionally, two sliding holes are formed in the rotating ring, the rotating rods correspond to the sliding holes one by one and are located in the sliding holes. One end of the rotating rod extending into the rotating ring is rotatably connected to a first connecting rod. A second connecting rod is slidably arranged in the rotating ring. The two first connecting rods are jointly hinged on the second connecting rod. The second connecting rod is connected with a fixing block. A first fixing hole is formed in the fixing block, and a plurality of second fixing holes are formed in the rotating ring. The first fixing hole communicates with one of the second fixing holes, and the fixing block and the rotating ring are bolted through the first fixing hole and the second fixing hole.

[0017] By adopting the above technical solution, when the rotating rod moves along the sliding hole, the first connecting rod drives the second connecting rod to move, and the second connecting rod drives the fixing block to move. The rotating rod can be opened or clamped by hand to adjust the distance between the two rotating rods in sequence, and the fixing block is fixed on the rotating ring with a screw rod, so as to realize the fixation of the two rotating rods. The rotating rod passes through screw heads of different sizes, so that the ejecting mechanism can eject nuts of different sizes.

[0018] Optionally, a limiting sleeve is arranged in the rotating ring, and the first connecting rod passes through the limiting sleeve.

[0019] By adopting the above technical solution, the situation that the first connecting rod is deformed when adjusting the distance between the rotating rods is reduced.

[0020] Optionally, an oil injection hole is formed in the housing, the oil injection hole communicates with the first annular groove, and an oil plug for closing the oil injection hole is arranged on the housing.

[0021] By adopting the above technical solution, lubricating oil can be injected into the first annular groove to lubricate the first gear and the second gear.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The first gear is driven to rotate by a motor, the first gear drives the second gear to rotate, the second gear drives the rotating ring to rotate, the rotating ring drives the rotating rod to rotate, the rotating rod drives the nut to move, and the nut moves along the screw rod. The user holds the control handle and moves along the screw rod, so as to "push" the nut out of the screw rod, replacing the manual method of removing the nut and enabling the nut to be quickly removed from the screw rod.

[0024] 2. The rotating rod can be opened or clamped by hand to adjust the distance between the two rotating rods in sequence, and the fixing block is fixed on the rotating ring with a screw rod, so as to fix the two rotating rods. The rotating rod passes through screw heads of different sizes, enabling the ejection mechanism to eject nuts of different sizes. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0026] Figure 2 is the structural schematic diagram of the embodiment of the present application for showing the first annular groove and the second annular groove.

[0027] Figure 3 is the structural schematic diagram of the embodiment of the present application for showing the second fixing hole.

[0028] Figure 4 is the structural schematic diagram of the embodiment of the present application for showing the fixing block, the first connecting rod and the second connecting rod.

[0029] Figure 5 is Figure 2 the enlarged schematic diagram of part A in

[0030] Figure 6 is the structural schematic diagram of the embodiment of the present application for showing the torsion spring.

[0031] Description of the Reference Numerals: 1. Housing; 11. First through hole; 12. First annular groove; 13. Oil injection hole; 14. Connecting hole; 15. Oil plug; 16. Annular block; 2. Rotating ring; 21. Second annular groove; 22. Fixing block; 221. First fixing hole; 23. Second fixing hole; 24. Second connecting rod; 25. First connecting rod; 26. Limiting sleeve; 27. Sliding hole; 3. First gear; 4. Control handle; 5. Motor; 51. Second gear; 6. Rotating rod; 61. Flipping hole; 7. Fixing component; 71. First limiting block; 72. Second limiting block; 73. Moving rod; 74. Connecting rod; 75. Positioning block; 76. Torsion spring; 8. Driving part; 81. Support rod; 82. Electromagnet; 83. Armature; 84. Spring; 85. Pull rod. Detailed Embodiment

[0032] The following further describes the present application in detail Figures 1-6 with reference to the accompanying drawings.

[0033] An ejection mechanism driven by a ball screw pair is disclosed in an embodiment of the present application.

[0034] As Figure 1 and Figure 2 shown, the ejection mechanism driven by a ball screw pair includes a housing 1. The vertical cross-section of the housing 1 is concave-shaped, the housing 1 is disk-shaped as a whole, a first through hole 11 is formed on the side surface of the housing 1, a first annular groove 12 is formed on the inner wall of the housing 1, an oil injection hole 13 communicating with the first annular groove 12 is formed at the top of the housing 1, a connection hole 14 communicating with the first annular groove 12 is formed at the bottom of the housing 1, a rotating ring 2 is arranged on the housing 1, the mouth of the rotating ring 2 communicates with the first through hole 11, a second annular groove 21 is formed on the side of the rotating ring 2 away from the first through hole 11, an annular block 16 is arranged on the housing 1, the annular block 16 is inserted into the second annular groove 21, and a first gear 3 is arranged on the upper side wall of the rotating ring 2. The first gear 3 is located in the first annular groove 12.

[0035] An oil plug 15 for closing the oil injection hole 13 is arranged on the housing 1, a control handle 4 is arranged at the bottom of the housing 1, a motor 5 is arranged at the bottom of the housing 1, the motor 5 is connected with a second gear 51, one side of the second gear 51 extends into the connection hole 14 and meshes with the first gear 3, and the control handle 4 controls the opening and closing of the motor 5.

[0036] As Figure 2 shown, Figure 3 and Figure 4 shown, a fixing block 22 is slidably arranged in the rotating ring 2. A first fixing hole 221 is formed on the fixing block 22. A plurality of second fixing holes 23 are formed on the rotating ring 2. The second fixing holes 23 are arranged at equal intervals. The fixing block 22 is bolted to the rotating ring 2, and the bolt passes through the first fixing hole 221 and one of the second fixing holes 23. The fixing block 22 is connected with a second connecting rod 24. The second connecting rod 24 is slidably arranged in the rotating ring 2. The second connecting rod 24 is hinged with two first connecting rods 25. Two limiting sleeves 26 are arranged on the housing 1. The first connecting rods 25 correspond to the limiting sleeves 26 one by one and the first connecting rods 25 pass through the limiting sleeves 26. The two first connecting rods 74 are symmetrical about the diameter of the rotating ring 2. One end of the first connecting rod 25 away from the second connecting rod 24 is hinged with a rotating rod 6. A sliding hole 27 is formed on the rotating ring 2. The sliding hole 27 is a long strip hole. The two sliding holes 27 are symmetrical about the diameter of the rotating ring 2. The rotating rod 6 extends out of the sliding hole 27. One end of the rotating rod 6 extending out of the sliding hole 27 passes through a screw head, and a fixing assembly 7 for clamping the screw head on the rotating rod 6 is arranged in the rotating rod 6.

[0037] When removing the nut, first move the two rotating rods 6 to adjust the distance between the two rotating rods 6, so that the two rotating rods 6 are aligned with the holes on the screw head, and then pass the holes of the rotating rod 6 through the screw head. At this time, the screw passes through the rotating ring 2 and the shell 1, and then the control handle 4 controls the fixing assembly 7 to clamp the rotating rod 6 to prevent the nut from separating from the rotating rod 6 during the movement. Then the control handle 4 controls the motor 5 to rotate, the motor 5 drives the second gear 51 to rotate, the second gear 51 drives the first gear 3 to rotate, the first gear 3 drives the rotating ring 2, the rotating ring 2 drives the rotating rod 6 to rotate, the rotating rod 6 drives the nut to rotate, and the nut moves along the length direction of the screw. The user holds the control handle 4 and makes the shell 1 move with the nut, so that the nut is "pushed" out of the screw, and then the control handle 4 controls the fixing assembly 7 to separate from the nut so that the nut slides out of the rotating rod 6, replacing the manual method of removing the nut, so that the nut can be quickly removed from the screw.

[0038] like Figure 2 , Figure 5 and Figure 6 The fixing assembly 7 includes a driving member 8, two first limit blocks 71 and two second limit blocks 72. The driving member 8 is arranged in the rotating rod 6. The driving member 8 is connected to a moving rod 73. Two connecting rods 74 are hinged on the moving rod 73. The two connecting rods 74 are respectively hinged with a second limit block 72. Four positioning blocks 75 are arranged in the rotating rod 6. Every two positioning blocks 75 form a group. The second limit blocks 72 correspond to the positioning blocks 75 one by one. The second limit block 72 is located between two positioning blocks 75 of the same group. One end of the first limit block 71 is rotatably connected in the rotating rod 6. A torsion spring 76 is arranged on the hinge shaft of the rotating rod 6. A flip hole 61 is opened on the rotating rod 6. The other end of the first limit block 71 extends out of the flip hole 61. The first limit block 71 corresponds to the second limit block 72 one by one. The second limit block 72 is against the side of the first limit block 71 away from the rotating ring 2. The torsion spring 76 is in a torsion state. The screw head is located between the two first limit blocks 71.

[0039] The driving member 8 includes a support rod 81, an electromagnet 82 and an armature 83. The support rod 81 is arranged on the rotating rod 6, and the electromagnet 82 is arranged in the rotating rod 6. The support rod 81 passes through the electromagnet 82. A spring 84 is arranged on the electromagnet 82. The spring 84 is sleeved on the support rod 81. The armature 83 is sleeved on the support rod 81. The spring 84 is connected to the armature 83. A pull rod 85 is connected to the side of the armature 83 facing away from the electromagnet 82, and the pull rod 85 is connected to the moving rod 73.

[0040] The control handle 4 controls the energization of the electromagnet 82. The electromagnet 82 attracts the armature 83. The armature 83 drives the moving rod 73 to move. The moving rod 73 drives the connecting rod 74 to move and pulls the second limiting block 72 away from the first limiting block 71. At this time, the torsion spring 76 returns to its natural state and drives the first limiting block 71 to flip into the rotating rod 6. Then, the rotating rod 6 is passed through the screw head and then the moving rod 73 is controlled to reset. The moving rod 73 drives the connecting rod 74 to move, and the second limiting block 72 pushes the first limiting block 71 out of the rotating rod 6 again, realizing the limitation of the screw head and preventing the nut from separating from the rotating rod 6 during the removal process.

[0041] When the nut is separated from the screw rod, the control handle 4 is used again to control the electromagnet 82 to be energized. The electromagnet 82 attracts the armature 83. The armature 83 pulls the pull rod 85. The pull rod 85 pulls the moving rod 73 close to the support rod 81. The moving rod 73 adjusts the rotation and movement of the connecting rod 74. The connecting rod 74 drives the second limiting block 72 to move in the direction close to the inner bottom wall of the rotating rod 6 and separates the second limiting block 72 from the first limiting block 71. At this time, the torsion spring 76 drives the first limiting block 71 to flip into the rotating rod 6 and rest on the positioning block 75, so that the nut is pulled out from the rotating rod 6. Two nuts can be inserted through the rotating rod 6. The first limiting block 71 close to the rotating ring 2 can separate the two nuts.

[0042] The implementation principle of the embodiment of the present application is as follows: The motor 5 drives the first gear 3 to rotate. The first gear 3 drives the second gear 51 to rotate. The second gear 51 drives the rotating ring 2 to rotate. The rotating ring 2 drives the rotating rod 6 to rotate. The rotating rod 6 drives the nut to move actively. The nut moves along the screw rod. The user holds the control handle and moves along the screw rod, so as to "push" the nut out of the screw rod, replacing the manual method of removing the nut and enabling the nut to be quickly removed from the screw rod.

[0043] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An ejection mechanism driven by a ball screw pair, characterized in that: The invention comprises a housing (1), a rotating ring (2) is rotatably connected to the housing (1), the housing (1) is disc-shaped, a first ring groove (12) is provided in the housing (1), a first gear (3) is provided on the rotating ring (2), a connecting hole (14) is provided on the housing (1), the connecting hole (14) is connected to the first ring groove (12), a motor (5) is provided on the housing (1), the motor (5) is connected to a second gear (51), and one side of the second gear (51) extends The rotating ring (2) is provided with at least two rotating rods (6), and the rotating rods (6) are provided with fixing components (7) for limiting the nut from falling off the rotating rods (6). The housing (1) is provided with a control handle (4) for controlling the motor (5) and the fixing component (7). The housing (1) is provided with a first through hole (11), and the screw rod passes through the rotating ring (2) and the first through hole (11).

2. The ejection mechanism driven by a ball screw pair according to claim 1, wherein: The housing (1) is provided with an annular block (16), the rotating ring (2) is provided with a second annular groove (21), and the annular block (16) is located in the second annular groove (21).

3. The ejecting mechanism driven by a ball screw pair according to claim 1, characterized in that: The fixing assembly (7) comprises two first limit blocks (71) and two second limit blocks (72); one end of the first limit block (71) is rotatably arranged in the rotating rod (6), and the other end thereof extends out of the rotating rod (6); the screw head of the nut is located between the two first limit blocks (71); a torsion spring (76) is arranged on the hinge axis between the first limit block (71) and the rotating rod (6); the second limit block (72) corresponds to the first limit block (71) one by one and abuts against the first limit block (71); the second limit block (72) and the first limit block (71) are connected to each other. The positioning block (71) abuts against one side of the rotating ring (2), a moving rod (73) is slidably arranged inside the rotating rod (6), two connecting rods (74) are hinged on the moving rod (73), the connecting rods (74) correspond to the second limiting block (72) one by one and are hinged to each other, a positioning block (75) is arranged in the shell (1) for limiting the movement of the second limiting block (72) along the length direction of the rotating rod (6), and a driving member (8) is arranged in the connecting rod (74) for controlling the sliding of the moving rod (73).

4. The ejecting mechanism driven by a ball screw pair according to claim 3, characterized in that: The driving member (8) comprises a support rod (81), an electromagnet (82) and an armature (83); the electromagnet (82) is fixed on the support rod (81); the armature (83) is slidably arranged on the support rod (81); a spring (84) is sleeved on the support rod (81); one end of the spring (84) is connected to the electromagnet (82); the other end of the spring (84) is connected to the armature (83); the armature (83) is connected to the moving rod (73); and the control handle (4) controls the electromagnet (82) to be energized or de-energized.

5. The ejection mechanism driven by a ball screw pair according to claim 4, characterized in that: A pull rod (85) is provided on the armature (83), and the pull rod (85) is connected to the moving rod (73).

6. The ejection mechanism driven by a ball screw pair according to claim 1, characterized in that: Two sliding holes (27) are formed in the rotating ring (2). The rotating rods (6) correspond to the sliding holes (27) one by one and are located in the sliding holes (27). A first connecting rod (25) is rotatably connected to one end of the rotating rod (6) extending into the rotating ring (2). A second connecting rod (24) is slidably arranged in the rotating ring (2). The two first connecting rods (25) are jointly hinged to the second connecting rod (24). The second connecting rod (24) is connected to a fixed block (22). A first fixing hole (221) is formed in the fixed block (22). A plurality of second fixing holes (23) are formed in the rotating ring (2). The first fixing hole (221) communicates with one of the second fixing holes (23). The fixed block (22) and the rotating ring (2) are bolted through the first fixing hole (221) and the second fixing hole (23).

7. The ejecting mechanism driven by a ball screw pair according to claim 6, characterized in that: A limiting sleeve (26) is arranged in the rotating ring (2), and the first connecting rod (25) passes through the limiting sleeve (26).

8. The ejecting mechanism driven by a ball screw pair according to claim 1, characterized in that: An oil injection hole (13) is formed in the housing (1), and the oil injection hole (13) communicates with the first annular groove (12). An oil plug (15) for closing the oil injection hole (13) is arranged on the housing (1).

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