Limiting gear assembly

Abstract

The utility model discloses a limit gear assembly which comprises an installation box, a main shaft is fixed at the bottom end inside the installation box, and the lower end of the main shaft extends out of the installation box to be connected with an external driving source. A sliding plate is slidably arranged on the upper surface of the mounting box, guide rods are slidably connected to the middle of the sliding plate in a penetrating mode, the left end and the right end of each guide rod are fixed to the mounting box, and meanwhile the number of the guide rods is two. The surface of the sliding plate is connected with a fixing bolt in a penetrating and threaded mode, and the lower end of the fixing bolt extends into the connecting hole to be in threaded connection with the connecting hole. According to the limiting gear assembly, the rotation angle of the limiting gear is adjusted, so that the whole limiting gear does not need to be disassembled, and time and manpower are greatly saved; in addition, signals are sent through the infrared transmitter, after the signals are received through the controller, the controller controls the external driving source to drive the main shaft to rotate reversely, and therefore the characteristics of the limiting gear assembly are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of limiting gears, in particular to a limiting gear assembly. Background Art

[0002] A limit gear refers to a gear that limits the movement of a gear under certain conditions. It is generally used in mechanical equipment to control the movement range of the gear and prevent excessive rotation or movement. For example, in the patent with the announcement number "CN210461606U" and the name "A limit gear device", it includes a driving gear, a limit gear, a lock head and an electromagnet; the driving gear is arranged on the output shaft of the knee joint motor, the limit gear is arranged on the knee joint shaft, the tooth segment of the limit gear is meshed with the driving gear, a limit head is arranged at the lower end of the limit gear, a movable lock head is arranged on the support frame below the limit head, the movable lock head is connected to the electromagnet arranged below, the electromagnet is connected to the controller, a limit block is arranged on the support frame behind the movable lock head, and the limit block corresponds to the limit head in front of it. However, the above structure still has the following problems in actual use:

[0003] During use, the above structure limits the limit gear by setting a limit block on the support frame behind the movable lock. However, the limiting angle is limited. When the required limiting angle is different, different limit gears need to be replaced. Since the replacement of gears is complicated, it is time-consuming and labor-intensive, and has poor practicality.

[0004] Therefore, we proposed that the limit gear assembly can solve the above problems well. Utility Model Content

[0005] The purpose of the utility model is to provide a limit gear assembly to solve the problem raised by the above-mentioned background technology that the current market has limited limit angles. When different limit angles are required, different limit gears need to be replaced. Since the replacement of gears is relatively cumbersome, it is time-consuming and labor-intensive, and has poor practicality.

[0006] To achieve the above object, the utility model provides the following technical solution: a limit gear assembly, comprising a mounting box, a main shaft is fixed to the inner bottom end of the mounting box, and the lower end of the main shaft extends out of the mounting box and is connected to an external drive source;

[0007] It also includes: a sliding plate is slidably arranged on the upper surface of the installation box, and a guide rod is slidably connected to the middle of the sliding plate, and the left and right ends of the guide rod are fixed to the installation box, and two groups of guide rods are arranged;

[0008] The surface of the sliding plate is threadedly connected with a fixing bolt, and the lower end of the fixing bolt extends into the connecting hole to form a threaded connection with the connecting hole, and the connecting hole is opened on the upper surface of the installation box;

[0009] A cylinder is fixed through the middle of the sliding plate, and the output end of the cylinder is fixed to the limiting rod, while the lower end of the limiting rod extends into the first limiting groove, and the first limiting groove is opened on the upper surface of the limiting gear.

[0010] Preferably, a driving gear is fixed on the outer side surface of the upper end of the main shaft, and the outer side surface of the driving gear is meshed with a limiting gear, and a secondary shaft is fixed in the middle of the limiting gear, and the lower end of the secondary shaft is connected to the mounting box bearing.

[0011] Preferably, a second limiting groove is further formed on the upper surface of the limiting gear, and the angle of the second limiting groove is 180 degrees, and the angle of the first limiting groove is 240 degrees.

[0012] Preferably, a telescopic rod is provided at the lower end of the limiting rod, and two groups of telescopic rods are provided.

[0013] Preferably, the telescopic rod is elastically slidably connected to the limiting rod via a return spring, and two ends of the return spring are respectively fixed to the limiting rod and the telescopic rod.

[0014] Preferably, when the telescopic rod slides into the limiting rod, its inner end contacts the trigger block, and the trigger block is fixed inside the limiting rod, and the trigger block is electrically connected to the infrared emitter through a transmission line.

[0015] Preferably, the infrared transmitter is fixed inside the lower end of the limiting rod, and the infrared transmitter can transmit a signal to an external controller, and the control unit controls the external driving source to drive the main shaft to rotate forward and reverse.

[0016] Compared with the prior art, the beneficial effects of the utility model are: the limit gear assembly not only solves the problem of adjusting the rotation angle of the limit gear, so that the limit gear does not need to be disassembled as a whole, which greatly saves time and manpower, effectively improves efficiency, and sends a signal through an infrared transmitter, and after the controller receives the signal, the controller controls the external driving source to drive the main shaft to reverse, thereby increasing the characteristics of the limit gear assembly, and its specific contents are as follows:

[0017] The position of the sliding plate can be locked by rotating the fixing bolt into the connecting hole, thereby achieving the limiting effect. At this time, the cylinder can be controlled to drive the limiting rod to descend, so that the lower end of the limiting rod is drawn into the second limiting groove, thereby achieving the limiting effect, and then completing the problem of adjusting the rotation angle of the limiting gear, so that there is no need to disassemble the limiting gear as a whole, which greatly saves time and manpower and effectively improves efficiency;

[0018] Further, the fixing bolt is rotated and removed, and then the control cylinder drives the limit rod to rise, so that the lower end of the limit rod slides out of the first limit groove. At this time, the sliding plate can be slid to the left, and the sliding connection formed between the guide rod and the sliding plate makes the movement of the sliding plate more stable;

[0019] The main shaft is driven to rotate by an external driving source, so that the main shaft drives the driving gear to rotate, and the driving gear drives the meshing limit gear to rotate together, and the limit gear drives the first limit slot to rotate together, so that the first limit slot and the limit rod slide, and the limit rod is used to achieve the limiting effect, so as to limit the maximum rotation angle of the limit gear, and thus meet specific requirements;

[0020] When the limit gear causes the limit rod to change in the first limit groove and the second limit groove, when it rotates to a certain position, the limit gear will also squeeze the telescopic rod, so that the telescopic rod is squeezed and slides into the limit rod, so that the inner end of the telescopic rod contacts and squeezes the trigger block, so that the trigger block is stressed and transmits the signal to the infrared transmitter, and the signal is sent through the infrared transmitter. After the controller receives the signal, the controller controls the external drive source to drive the main shaft to reverse;

[0021] When the telescopic rod is no longer squeezed, it can be reset by the compressed reset spring, so as to facilitate the next use. The normal operation of the limit gear is achieved through the first limit groove, the second limit groove, the two sets of telescopic rods and the trigger block. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the top view structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of the limit rod of the utility model;

[0026] Figure 5 For this utility model Figure 4 The enlarged structural diagram at A in the middle;

[0027] Figure 6 It is a schematic diagram of the explosion structure of the sliding plate of the utility model.

[0028] In the figure: 1. Installation box; 2. Main shaft; 3. Driving gear; 4. Limiting gear; 5. Secondary shaft; 6. First limiting groove; 7. Second limiting groove; 8. Limiting rod; 9. Cylinder; 10. Sliding plate; 11. Guide rod; 12. Fixing bolt; 13. Connecting hole; 14. Telescopic rod; 15. Reset spring; 16. Trigger block; 17. Infrared transmitter. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 6 , the utility model provides the following technical solutions:

[0031] Embodiment 1: In order to solve the problem that the limiting angle proposed in the prior art is limited, when the required limiting angle is different, it is necessary to replace different limiting gears 4. Since the replacement of gears is cumbersome, it is time-consuming and labor-intensive, and the practicality is poor, the following scheme is disclosed, including an installation box 1, a main shaft 2 is fixed to the bottom end of the installation box 1, and the lower end of the main shaft 2 extends out of the installation box 1 and is connected to an external driving source; and also includes: a sliding plate 10 is slidably provided on the upper surface of the installation box 1, and a guide rod 1 is slidably connected to the middle of the sliding plate 10 1, and the left and right ends of the guide rod 11 are fixed to the installation box 1, and two groups of guide rods 11 are provided; the surface of the sliding plate 10 is threadedly connected with a fixing bolt 12, and the lower end of the fixing bolt 12 extends to the connecting hole 13 to form a threaded connection with the connecting hole 13, and the connecting hole 13 is opened on the upper surface of the installation box 1; the middle of the sliding plate 10 is penetrated and fixed with a cylinder 9, and the output end of the cylinder 9 is fixed to the limit rod 8, and the lower end of the limit rod 8 extends to the first limit groove 6, and the first limit groove 6 is opened on the upper surface of the limit gear 4;

[0032] When the limit angle of the limit gear 4 needs to be adjusted, it is only necessary to rotate and remove the fixing bolt 12, and then control the cylinder 9 to drive the limit rod 8 to rise, so that the lower end of the limit rod 8 slides out of the first limit groove 6. At this time, the sliding plate 10 can be slid to the left, and the sliding connection formed between the guide rod 11 and the sliding plate 10 makes the movement of the sliding plate 10 more stable. At the same time, when sliding to the specified position, it is only necessary to turn the fixing bolt 12 into the connecting hole 13 to lock the position of the sliding plate 10, thereby completing the limiting effect. At this time, the cylinder 9 can be controlled to drive the limit rod 8 to descend, so that the lower end of the limit rod 8 is inserted into the second limit groove 7, thereby achieving the limiting effect, and then completing the problem of adjusting the rotation angle of the limit gear 4, thereby there is no need to disassemble the limit gear 4 as a whole, which greatly saves time and manpower and effectively improves efficiency.

[0033] Embodiment 2: Different from Embodiment 1, this embodiment limits the maximum rotation angle of the limit gear 4, thereby meeting specific requirements. For details, refer to Figure 2-Figure 3 A driving gear 3 is fixed to the outer side surface of the upper end of the main shaft 2, and the outer side surface of the driving gear 3 is meshed with a limit gear 4, and a secondary shaft 5 is fixed in the middle of the limit gear 4, and the lower end of the secondary shaft 5 is connected to the bearing of the mounting box 1, and a second limit groove 7 is also opened on the upper surface of the limit gear 4, and the angle of the second limit groove 7 is 180 degrees, and the angle of the first limit groove 6 is 240 degrees;

[0034] The main shaft 2 is driven to rotate by an external driving source, so that the main shaft 2 drives the driving gear 3 to rotate, and the driving gear 3 drives the meshing limit gear 4 to rotate together, and the limit gear 4 drives the first limit groove 6 to rotate together, so that the first limit groove 6 and the limit rod 8 slide, and the limit rod 8 achieves the limiting effect, so as to limit the maximum rotation angle of the limit gear 4, and thus meet the specific requirements;

[0035] Embodiment 3: Different from Embodiment 2, this embodiment can improve the use effect of the limit gear 4. Figure 2-Figure 6 , a telescopic rod 14 is provided at the lower end of the limit rod 8, and the telescopic rod 14 is provided with two groups, the telescopic rod 14 is elastically slidably connected with the limit rod 8 through a reset spring 15, and the two ends of the reset spring 15 are respectively fixed to the limit rod 8 and the telescopic rod 14, when the telescopic rod 14 slides into the limit rod 8, its inner end will contact the trigger block 16, and the trigger block 16 is fixed inside the limit rod 8, and at the same time, the trigger block 16 is electrically connected with the infrared transmitter 17 through a transmission line, and the infrared transmitter 17 is fixed inside the lower end of the limit rod 8, and at the same time, the infrared transmitter 17 can transmit a signal to an external controller, and the control unit controls the external driving source to drive the main shaft 2 to rotate forward and reverse;

[0036] When the limit gear 4 rotates, the limit rod 8 will also change in the first limit groove 6 and the second limit groove 7. When it rotates to a certain position, the limit gear 4 will also squeeze the telescopic rod 14, so that the telescopic rod 14 is squeezed and slides into the limit rod 8, so that the inner end of the telescopic rod 14 contacts and squeezes the trigger block 16, so that the trigger block 16 is subjected to force and transmits the signal to the infrared transmitter 17, and the signal is sent through the infrared transmitter 17. After the controller receives the signal, the controller controls the external driving source to drive the main shaft 2 to reverse, and then the normal operation of the limit gear 4 is realized through the first limit groove 6 and the second limit groove 7 and the two groups of telescopic rods 14 and the trigger block 16, thereby increasing the characteristics of the limit gear 4. At the same time, when the telescopic rod 14 is no longer subjected to force and compression, it can be reset by the compressed reset spring 15, so as to facilitate the next use.

[0037] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A limit gear assembly, comprising a mounting box (1), a main shaft (2) being fixed to the bottom end of the interior of the mounting box (1), and a lower end of the main shaft (2) extending out of the mounting box (1) to be connected to an external drive source; It is characterized in that Also includes: A sliding plate (10) is slidably provided on the upper surface of the installation box (1), and a guide rod (11) is slidably connected to the middle of the sliding plate (10), and both left and right ends of the guide rod (11) are fixed to the installation box (1), and two groups of guide rods (11) are provided; A fixing bolt (12) is threadedly connected through the surface of the sliding plate (10), and the lower end of the fixing bolt (12) extends into the connecting hole (13) to form a threaded connection with the connecting hole (13), and the connecting hole (13) is opened on the upper surface of the installation box (1); A cylinder (9) is fixedly passed through the middle of the sliding plate (10), and the output end of the cylinder (9) is fixed to the limiting rod (8), while the lower end of the limiting rod (8) extends into the first limiting groove (6), and the first limiting groove (6) is opened on the upper surface of the limiting gear (4).

2. A limit gear assembly according to claim 1, characterized in that: A driving gear (3) is fixed to the outer side surface of the upper end of the main shaft (2), and the outer side surface of the driving gear (3) is meshed with a limit gear (4), and a secondary shaft (5) is fixed in the middle of the limit gear (4), and the lower end of the secondary shaft (5) is connected to the bearing of the mounting box (1).

3. A limit gear assembly according to claim 1, characterized in that: The upper surface of the limiting gear (4) is also provided with a second limiting groove (7), and the angle of the second limiting groove (7) is 180 degrees, and the angle of the first limiting groove (6) is 240 degrees.

4. A limit gear assembly according to claim 1, characterized in that: A telescopic rod (14) is provided at the lower end of the limiting rod (8), and two groups of telescopic rods (14) are provided.

5. A limit gear assembly according to claim 4, characterized in that: The telescopic rod (14) is elastically slidably connected to the limiting rod (8) via a return spring (15), and two ends of the return spring (15) are respectively fixed to the limiting rod (8) and the telescopic rod (14).

6. A limit gear assembly according to claim 4, characterized in that: When the telescopic rod (14) slides into the limiting rod (8), its inner end contacts the trigger block (16), and the trigger block (16) is fixed inside the limiting rod (8). At the same time, the trigger block (16) is electrically connected to the infrared emitter (17) via a transmission line.

7. A limit gear assembly according to claim 6, characterized in that: The infrared transmitter (17) is fixed inside the lower end of the limit rod (8), and the infrared transmitter (17) can transmit a signal to an external controller, and the control unit controls the external driving source to drive the main shaft (2) to rotate forward and reverse.

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