Quick moving structure and nut assembly thereof

Abstract

The utility model discloses a nut assembly which comprises a sleeve and a nut, the nut is provided with a screw hole, an internal thread is arranged at the bottom of the screw hole, and the height of the screw hole is larger than the diameter of the internal thread. The sleeve is provided with a limiting sliding groove which is matched with the nut and allows the nut to move up and down, the nut is arranged in the limiting sliding groove, and an elastic piece is arranged between the bottom of the nut and the limiting sliding groove. When the sleeve and the nut are sleeved outside the screw rod and are matched with the screw rod for use, the elastic force of the elastic piece pushes the nut to enable the internal thread at the bottom of the screw hole to be in threaded connection with the screw rod; when the nut quickly moves relative to the screw, the nut is pressed down, so that the internal thread is separated from the screw, and the sleeve and the nut can axially move relative to the screw.

Description

Technical Field

[0001] The utility model relates to an improved invention of a moving structure, in particular to a fast moving structure and a nut assembly thereof suitable for processing equipment. Background Art

[0002] Moving structures are commonly used in mechanical processing equipment, such as packaging machines, bag making machines, etc. Moving structures are not only used to move parts, but also to adjust the lateral, longitudinal or height positions of parts. The lead screw mechanism is a commonly used moving structure in this field. The rotation of the screw causes the nut to move linearly, and the parts connected to the nut move linearly accordingly, thereby achieving the position adjustment or movement of the parts. Because the lead screw mechanism has high movement accuracy and precise positioning, it is suitable for adjusting small distances, but not suitable for rapid movement. When the active position of a part changes from one end of the screw to the other, it is necessary to rotate the screw to gradually move the part to the other end of the screw. If the screw is long, it will take a long time to drive the screw to move the nut to the desired position, which is not only inefficient but also labor-intensive. Summary of the invention

[0003] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a rapid moving structure and a nut assembly thereof, which can move accurately and be suitable for adjustment of small distances, and can also move quickly into place to improve efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A nut assembly comprises a sleeve and a nut.

[0006] The nut is provided with a screw hole, the bottom of the screw hole is provided with an internal thread, and the height of the screw hole is greater than the diameter of the internal thread;

[0007] The sleeve is provided with a limiting slide groove matching with the nut and allowing the nut to move up and down, the nut is placed in the limiting slide groove, and an elastic member is provided between the bottom of the nut and the limiting slide groove;

[0008] When the sleeve and the nut are sleeved outside the screw and used in conjunction with the screw, the elastic force of the elastic member pushes the nut so that the internal thread at the bottom of the screw hole is threadedly connected to the screw; when the nut moves rapidly relative to the screw, the nut is pressed down to separate the internal thread from the screw, and the sleeve and the nut can move axially relative to the screw.

[0009] The internal thread of the utility model matches the screw rod, the height of the screw hole is greater than the outer diameter of the screw rod, and the nut can move radially relative to the screw rod to realize two states of threaded connection and separation. When the internal thread of the nut is threadedly connected to the screw rod, the rotation of the screw rod drives the nut to move axially relative to the screw rod, which is used for precise movement of parts or adjustment of small distances; when the internal thread of the nut is separated from the screw rod, the nut is not restricted by the screw rod, and the nut can move axially quickly relative to the screw rod.

[0010] A fast moving structure, characterized in that it comprises a screw and a nut assembly, wherein the nut assembly comprises a nut and a sleeve,

[0011] The nut is provided with a screw hole, the height of the screw hole is greater than the outer diameter of the screw rod, and the bottom of the screw hole is provided with an internal thread matching the screw rod;

[0012] The sleeve is provided with a limiting slide groove which matches the nut and allows the nut to move up and down, the nut is placed in the limiting slide groove, the screw rod passes through the screw hole and the sleeve, an elastic member is provided between the bottom of the nut and the limiting slide groove, and the elastic force of the elastic member pushes the nut so that the internal thread at the bottom of the screw hole is screwed to the screw rod;

[0013] When moving quickly, the nut is pressed down to separate the internal thread from the screw rod, and the sleeve and the nut can move axially relative to the screw rod.

[0014] The utility model has a simple structure and reasonable design. In the working state, the elastic force of the elastic member pushes the nut so that the internal thread at the bottom of the screw hole is screwed to the screw rod. The screw rod is rotated, and the nut moves relative to the screw rod through the internal thread. The movement is accurate and can be adjusted by a small distance. When rapid movement is required in the non-working state, the nut is pressed down, and the nut moves down in the limiting slide groove. The internal thread is separated from the screw rod, and the nut is not restricted by the screw rod. The nut can move axially quickly relative to the screw rod to send the component to the desired position, and then the nut is loosened. Under the elastic force of the elastic member, the nut moves up and resets, and the internal thread is screwed to the screw rod. At this time, the screw rod can be rotated for fine adjustment to move the component to a precise position. The utility model not only greatly improves the efficiency of movement, but also has high movement accuracy and precise positioning.

[0015] Preferably, the vertical cross section of the screw hole is runway-shaped, the upper and lower ends of the screw hole are both semicircular, and the internal thread is only provided at the lower end of the screw hole. The runway-shaped screw hole has good matching performance with the cylindrical screw rod, and the two states of the nut and the screw rod being screwed together and the nut and the screw rod being separated can be achieved through a smaller screw hole; and the contact area between the nut and the screw rod is large during screwing, and the nut movement is stable when the screwing is stable.

[0016] Preferably, the bottom of the sleeve is a plane and corresponds to the top of the nut. When moving quickly, the thumb supports the bottom of the sleeve and one finger presses the nut, which is convenient to use.

[0017] Preferably, the sleeve is sleeved outside the nut, and the sleeve is provided with a through hole for the screw to pass through. The nut is surrounded by the sleeve, and the nut and the limiting slide groove are slidably matched, and the up and down movement is stable. The axial movement of the nut relative to the screw drives the axial movement of the sleeve; in addition, the nut in the sleeve reduces the influence of the screw hole on the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the fast moving structure of the utility model Figure 1 .

[0019] Figure 2 It is a schematic diagram of the nut assembly of the utility model.

[0020] Figure 3 This is a schematic diagram of the fast moving structure of the utility model Figure 2 . DETAILED DESCRIPTION

[0021] The following describes the relevant details and working principles of the implementation methods and embodiments of the present utility model in conjunction with the accompanying drawings. Figure 1 In the figure, the Z axis is vertical, also the up and down direction, and the arrow direction is upward.

[0022] This fast moving joint includes a screw rod 2 and a nut assembly 1, wherein the nut assembly 1 includes a nut 5 and a sleeve 3, wherein the nut is provided with a screw hole 6, wherein the screw rod passes through the screw hole and the sleeve, wherein the height of the screw hole is greater than the outer diameter of the screw rod 2, wherein the nut 5 can move radially relative to the screw rod, and wherein the bottom of the screw hole is provided with an internal thread 9 matching the screw rod. It is preferred that the vertical section of the screw hole 6 is runway-shaped, wherein the upper and lower ends of the screw hole are both semicircular, and the internal thread 9 is only provided at the lower end of the screw hole 6. The runway-shaped screw hole has good matching performance with the cylindrical screw rod, and two states of the nut and the screw rod being screwed together and the nut and the screw rod being separated can be achieved through a relatively small screw hole, and the contact area between the nut and the screw rod is large during screwing, the screwing is stable, and the movement of the nut driven by the screw rod is stable.

[0023] The sleeve is provided with a limiting slide 8 that matches the nut and allows the nut to move up and down. The nut 5 is placed in the limiting slide 8. The limiting slide plays a guiding role on the nut, so that the nut can move up and down in the limiting slide stably. When the nut moves axially relative to the screw rod, the sleeve also moves accordingly. The nut 5 is prismatic, and the nut will not rotate in the sleeve. The nut is cylindrical, which is easy to process and has low cost. The sleeve 3 and the nut 5 can be partially covered or fully covered on all sides. Full coverage on all sides is preferred. The sleeve is sleeved outside the nut, and the nut is covered on all sides by the sleeve. The sleeve 3 is provided with a through hole 4 for the screw rod to pass through. The nut 5 is in the sleeve to reduce the influence of the external environment on the screw hole. For example, dust entering the internal thread will affect the screw connection between the nut and the screw rod. Moreover, full coverage on all sides makes the sliding cooperation between the nut and the limiting slide more stable. An elastic member 7 is provided between the bottom of the nut and the limiting slide 8. The elastic member in the figure is a spring. The elastic force of the elastic member 7 pushes the nut 5 so that the internal thread 9 at the bottom of the screw hole is screwed to the screw rod 2; when moving quickly, the nut 5 is pressed down to separate the internal thread from the screw rod, and the sleeve 3 and the nut 5 can move axially relative to the screw rod 2. The bottom 10 of the sleeve is preferably a plane, and corresponds to the top of the nut up and down. When moving quickly, the thumb supports the bottom of the sleeve and a finger presses the nut to move the nut down and separate from the screw rod, which is stable and easy to operate.

[0024] The utility model has a simple structure and reasonable design, and is applied to the movement and adjustment of components. The screw rod 2 passes through the through hole 4 of the sleeve and the screw hole 6 of the nut, and is rotatably installed on the frame, and the components that need to be adjusted or moved are connected to the sleeve. In the working state, the elastic force of the elastic member 7 pushes the nut 5 to make the internal thread 9 at the bottom of the screw hole screwed with the screw rod 2, and the screw rod is rotated, so that the nut moves accurately relative to the axial direction of the screw rod through the internal thread, so that the components move or adjust a small distance. When installing or when the position of the component needs to be adjusted over a long distance, the thumb supports the bottom 10 of the sleeve, and a finger presses the nut 5, so that the nut moves down in the limiting slide groove, the internal thread 9 is separated from the screw rod 2, and the nut is not restricted by the screw rod. The nut is moved axially, so that it moves quickly relative to the screw rod, and the component is sent to the desired position, and then the nut is loosened. Under the elastic force of the elastic member, the nut moves up and resets, and the internal thread is screwed with the screw rod. At this time, the position of the component can be fine-tuned by rotating the screw rod, so that the component moves to a precise position. The utility model not only greatly improves the moving efficiency, but also has high moving accuracy and precise positioning.

[0025] The description of the nut moving up and down and the bottom of the nut and the bottom of the sleeve in the utility model is as follows: Figure 1 and 2Take the position relationship shown as an example. When the internal thread of the nut is separated from the screw, the nut can not only move axially but also rotate circumferentially relative to the screw, and the nut and the sleeve can select the circumferential position according to the position of the parts on the frame, the installation position of the screw, and the connection position between the parts and the sleeve. Figure 1 In the embodiment, the internal thread of the nut is at the lower end of the screw hole, and the internal thread is screwed to the lower surface of the screw rod. When the nut moves downward, the internal thread is separated from the screw rod, and when the nut moves upward, the internal thread is screwed to the screw rod. Figure 3 In the embodiment, the internal thread of the nut is at the upper end of the screw, and the internal thread is screwed with the upper surface of the screw. When the nut is pressed to move upward, the internal thread is separated from the screw, and the elastic force of the elastic member moves the nut downward, and the internal thread is screwed with the screw. Similarly, the internal thread of the nut is on the side of the screw, and the internal thread is screwed with the side surface of the screw. The nut moves radially left and right relative to the screw, so that the internal thread is screwed or separated from the screw.

Claims

1. A nut assembly, characterized in that: Includes sleeve and nut, The nut is provided with a screw hole, the bottom of the screw hole is provided with an internal thread, and the height of the screw hole is greater than the diameter of the internal thread; The sleeve is provided with a limiting slide groove matching with the nut and allowing the nut to move up and down, the nut is placed in the limiting slide groove, and an elastic member is provided between the bottom of the nut and the limiting slide groove; When the sleeve and the nut are sleeved outside the screw and used in conjunction with the screw, the elastic force of the elastic member pushes the nut so that the internal thread at the bottom of the screw hole is threadedly connected to the screw; when the nut moves rapidly relative to the screw, the nut is pressed down to separate the internal thread from the screw, and the sleeve and the nut can move axially relative to the screw.

2. The nut assembly according to claim 1, characterized in that: The vertical section of the screw hole is a racetrack shape, the upper end and the lower end of the screw hole are both semicircular, and the internal thread is only arranged at the lower end of the screw hole.

3. The nut assembly according to claim 1, characterized in that: The bottom of the sleeve is a plane and corresponds to the top of the nut up and down.

4. The nut assembly according to claim 1, characterized in that: The sleeve is sleeved outside the nut, and a through hole is axially arranged on the sleeve for the screw rod to pass through.

5. A fast moving structure, characterized in that: It includes a screw and a nut assembly, wherein the nut assembly includes a nut and a sleeve, The nut is provided with a screw hole, the height of the screw hole is greater than the outer diameter of the screw rod, and the bottom of the screw hole is provided with an internal thread matching the screw rod; The sleeve is provided with a limiting slide groove which matches the nut and allows the nut to move up and down, the nut is placed in the limiting slide groove, the screw rod passes through the screw hole and the sleeve, an elastic member is provided between the bottom of the nut and the limiting slide groove, and the elastic force of the elastic member pushes the nut so that the internal thread at the bottom of the screw hole is screwed to the screw rod; When moving quickly, the nut is pressed down to separate the internal thread from the screw rod, and the sleeve and the nut can move axially relative to the screw rod.

6. The fast moving structure according to claim 5, characterized in that: The vertical section of the screw hole is a racetrack shape, the upper end and the lower end of the screw hole are both semicircular, and the internal thread is only arranged at the lower end of the screw hole.

7. The fast moving structure according to claim 5, characterized in that: The bottom of the sleeve is a plane and corresponds to the top of the nut up and down.

8. The fast moving structure according to claim 5, characterized in that: The sleeve is sleeved outside the nut and is provided with a through hole for the screw rod to pass through.

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