Two-stage screw drive mechanism

Abstract

This utility model discloses a two-stage screw transmission mechanism, including a drive mechanism and a screw body that drives the drive mechanism. The screw body consists of a first screw and a second screw, with the second screw vertically located below the first screw and moving in the same direction as the first screw. A balance block is provided at the connection between the second screw and the first screw, with the second screw vertically located below the balance block and the first screw vertically located above the balance block. The screw parameters of the first screw and the second screw are different.

Description

Technical Field

[0001] This utility model relates to the field of transmission components, and in particular to a two-stage screw transmission mechanism. Background Technology

[0002] Screw drive is a commonly used transmission method in mechanical transmission. Under normal circumstances, the screw in a screw drive device has only one screw coefficient. Therefore, the screw can only be matched with a transmission device that matches the screw coefficient, and can only achieve one output effect. It is impossible to achieve different output effects on a single screw at the same time. For this reason, a two-stage screw drive mechanism is proposed. Utility Model Content

[0003] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0004] A two-stage screw drive mechanism includes a drive mechanism and a screw body that drives the drive mechanism. The screw body consists of a first screw and a second screw, with the second screw vertically located below the first screw and moving in the same direction as the first screw. A balance block is provided at the connection between the second screw and the first screw, with the second screw vertically located below the balance block and the first screw vertically located above the balance block. The screw parameters of the first screw and the second screw are different.

[0005] Preferably, the driving mechanism includes a housing for the screw body to rotate inside, and a rotor that rotates vertically inside the housing and rotates synchronously with the screw body. A stator core is fitted outside the rotor, and a magnetic ring is fitted inside the housing. The rotor rotates inside the stator core, and the stator core and rotor are vertically located inside the magnetic ring. The magnetic ring and the stator core are aligned with each other, and a magnetic force is generated between the magnetic ring and the stator core to form a magnetic field.

[0006] Preferably, the housing is provided with a PCBA that is horizontally mounted on its bottom, and the rotor passes through the PCBA and rotates at the middle position of the PCBA, and the PCBA is electrically connected to the stator core.

[0007] Preferably, a first ball bearing and a second ball bearing are provided between the rotor and the screw body, and the first ball bearing and the second ball bearing are located at the upper and lower ends inside the rotor, respectively, and the screw body passes through the first ball bearing and the second ball bearing.

[0008] Preferably, a retaining ring is provided between the second ball bearing and the screw body, and the retaining ring is inserted horizontally outside the screw body and positioned horizontally below the second ball bearing.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the balance block enables the first screw and the second screw to maintain rotational balance when rotating synchronously, and because the screw parameters of the first screw and the second screw are different, the first screw and the second screw can be connected to different types of transmission mechanisms respectively, so that when the drive mechanism drives the screw body to rotate, the first screw and the second screw can be connected to different types of transmission mechanisms at the same time, and two different output effects can be achieved at the same time.

[0010] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of a two-stage screw drive mechanism;

[0013] Figure 2 This is another structural schematic diagram of a two-stage screw drive mechanism;

[0014] Figure 3 This is a schematic diagram of the screw body.

[0015] The figure shows: 1. Screw body, 2. Housing, 3. PCBA, 4. Snap ring, 5. Balance block, 6. First screw, 7. Second screw, 8. First ball bearing, 9. Second ball bearing, 10. Stator core, 11. Magnetic ring, 12. Annular groove, 13. Rotor. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3In this embodiment of the present invention, the dual-segment screw transmission mechanism includes a drive mechanism and a screw body 1 that is driven and cooperates with the drive mechanism. The screw body 1 is composed of a first screw 6 and a second screw 7, with the second screw 7 vertically located below the first screw 6 and moving in the same direction as the first screw 6. A balance block 5 is provided at the connection between the second screw 7 and the first screw 6, with the second screw 7 vertically located below the balance block 5 and the first screw 6 vertically located above the balance block 5. The screw parameters of the first screw 6 and the second screw 7 are different, so that the first screw 6 and the second screw 7 maintain rotational balance when rotating synchronously through the balance block 5. Because the screw parameters of the first screw 6 and the second screw 7 are different, the first screw 6 and the second screw 7 can be connected to different types of transmission mechanisms respectively. So that when the drive mechanism drives the screw body 1 to rotate, the first screw 6 and the second screw 7 can be connected to different types of transmission mechanisms simultaneously, and achieve two different output effects at the same time.

[0018] The driving mechanism includes a housing 2 for the screw body 1 to rotate inside it, and a rotor 13 that rotates vertically inside the housing 2 and rotates synchronously with the screw body 1. A stator core 10 is fitted outside the rotor 13, and a magnetic ring 11 is fitted inside the housing 2. The rotor 13 rotates inside the stator core 10, and the stator core 10 and rotor 13 are vertically located inside the magnetic ring 11. The magnetic ring 11 and the stator core 10 are aligned with each other, and a magnetic force is generated between the magnetic ring 11 and the stator core 10 to form a magnetic field. This energizes the stator core 10 and changes the magnetic field between the magnetic ring 11 and the stator core 10, thereby driving the rotor 8 to rotate and simultaneously driving the screw body 1 to rotate. This further enables the first screw 6 and the second screw 7 to synchronously transmit power to different transmission mechanisms.

[0019] The outer casing 2 is provided with a PCBA3 that is horizontally mounted on its bottom. The rotor 13 passes through the PCBA3 and rotates at the middle position of the PCBA3. The PCBA3 is electrically connected to the stator core 10, thereby energizing the stator core 10 and changing the magnetic field between the magnetic ring 11 and the stator core 10 through the PCBA3.

[0020] A first ball bearing 8 and a second ball bearing 9 are provided between the rotor 13 and the screw body 1, and the first ball bearing 8 and the second ball bearing 9 are located at the upper and lower ends inside the rotor 13, respectively, and the screw body 1 passes through the first ball bearing 8 and the second ball bearing 9.

[0021] A retaining ring 4 is provided between the second ball bearing 9 and the screw body 1, and the retaining ring 4 is inserted horizontally outside the screw body 1 and is positioned horizontally below the second ball bearing 9.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A two-stage screw drive mechanism, comprising a drive mechanism and a screw body that drives the drive mechanism, characterized in that, The screw body consists of a first screw and a second screw, with the second screw vertically located below the first screw and moving in the same direction as the first screw. A balance block is provided at the connection between the second screw and the first screw, with the second screw vertically located below the balance block and the first screw vertically located above the balance block. The screw parameters of the first screw and the second screw are different.

2. The dual-segment screw transmission mechanism according to claim 1, characterized in that, The drive mechanism includes a housing for the screw body to rotate inside, and a rotor that rotates vertically inside the housing and rotates synchronously with the screw body. A stator core is fitted outside the rotor, and a magnetic ring is fitted inside the housing. The rotor rotates inside the stator core, and the stator core and rotor are vertically located inside the magnetic ring. The magnetic ring and the stator core are aligned with each other, and a magnetic force is generated between the magnetic ring and the stator core to form a magnetic field.

3. The dual-segment screw transmission mechanism according to claim 2, characterized in that, The outer casing is provided with a PCBA that is horizontally mounted on its bottom, and the rotor passes through the PCBA and rotates at the middle position of the PCBA. The PCBA is electrically connected to the stator core.

4. The dual-segment screw transmission mechanism according to claim 2, characterized in that, A first ball bearing and a second ball bearing are provided between the rotor and the screw body, and the first ball bearing and the second ball bearing are located at the upper and lower ends inside the rotor, respectively, and the screw body passes through the first ball bearing and the second ball bearing.

5. The dual-segment screw transmission mechanism according to claim 4, characterized in that, A retaining ring is provided between the second ball bearing and the screw body, and the retaining ring is inserted horizontally outside the screw body and is positioned horizontally below the second ball bearing.

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