Tooth tube adjusting mechanism

Abstract

The utility model relates to a tooth pipe adjusting mechanism which is installed on a cold header body and comprises a rotating shaft serving as a power source, a main bevel gear is fixedly connected to the rotating shaft and meshed with an auxiliary bevel gear, the auxiliary bevel gear is fixedly connected with a spline shaft, a spline sleeve is connected to the outside of the spline shaft in a sleeved mode, and the tooth pipe adjusting mechanism is installed on the cold header body. A first straight gear is arranged on the outer ring of the spline sleeve, a rear baffle and a front baffle are arranged at the two ends of the spline sleeve respectively, the first straight gear is meshed with a second straight gear on a threaded pipe to transmit torsional force, a sleeve part capable of being in contact with the rear baffle is arranged on the threaded pipe, external threads are arranged on the threaded pipe, and the threaded pipe is connected with the rear baffle. An internal thread workpiece is connected through the external thread, and a long ejector rod is arranged in the threaded pipe. According to the novel structure, the length of the spline shaft serving as a power source is greatly reduced, the cost of parts is saved, and the parts are light in weight and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of cold heading machine manufacturing technology, and in particular to a tooth tube adjustment mechanism. Background Technology

[0002] The threaded tube adjustment mechanism on a cold heading machine is used to adjust the length of the part to be upheld that can enter the mold. The length that can enter the mold determines the length of parts that can be upheld. This adjustment mechanism needs to operate once each time a new part of a different length is processed. However, it does not need to operate when producing the same batch of parts. The specific principle is as follows: The part to be upheld, placed in the mold, pushes the ejector rod, which in turn pushes the intermediate transmission rod. The intermediate transmission rod then pushes the long ejector rod. When the rod reaches a certain distance, the intermediate transmission rod is blocked by the threaded tube (a hollow tube with long threads, hence the name) fitted outside the long ejector rod. Therefore, the threaded tube needs to be retracted to the left under the action of the adjustment mechanism to allow the part to be upheld to fully enter the mold.

[0003] For existing dental tube adjustment mechanisms, please refer to [reference needed]. Figure 3 It works by using an extended gear tube to drive a sleeve section welded to the toothed tube to rotate, ultimately enabling the toothed tube to move axially left and right. Because the axial movement of the toothed tube always requires the continuous engagement of the extended gear tube, whose length is at least equal to the maximum displacement distance of the toothed tube, the extended gear tube, which serves as the power source in existing technologies, needs to be made very long. This type of extended gear tube has high processing costs, and its weight does not meet the requirements for lightweight parts. Summary of the Invention

[0004] The purpose of this invention is to provide a dental tube adjustment mechanism to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical measures: a toothed tube adjustment mechanism, installed on the body of a cold heading machine, includes a rotating shaft as a power source, a main bevel gear fixedly connected to the rotating shaft, the main bevel gear meshing with a secondary bevel gear, wherein the secondary bevel gear is fixedly connected to a spline shaft, a spline sleeve is sleeved on the outside of the spline shaft, a first spur gear is provided on the outer ring of the spline sleeve, a rear baffle and a front baffle are respectively provided at both ends of the spline sleeve, the first spur gear meshes with a second spur gear on the toothed tube to transmit torsional force, a sleeve portion is provided on the toothed tube that can contact the rear baffle, an external thread is provided on the toothed tube, an internally threaded workpiece is connected through the external thread, and a long push rod is provided inside the toothed tube.

[0006] Compared with the prior art, the advantages of this utility model are: this new structure greatly reduces the length of the spline shaft as a power source, saves the cost of parts, and makes the parts lightweight and easy to operate.

[0007] As an improvement of this utility model, the rear baffle is rotatably connected to the spline sleeve via a rolling bearing. The purpose of this design is that when changing parts of different lengths to be upsetting, the threaded tube retracts (to the left), and after the sleeve on the threaded tube is firmly attached to the rear baffle, the spline sleeve is pushed back (to the left) along the spline axis. During the retraction process, the rear baffle and the threaded tube can rotate synchronously, and the rolling bearing can greatly reduce friction.

[0008] As an improvement of this utility model, the front baffle is rotatably connected to the spline sleeve via a rolling bearing. The purpose of this design is that when changing parts of different lengths to be upsetting, the threaded tube advances (to the right), and after the sleeve on the threaded tube is firmly attached to the front baffle, it pushes the spline sleeve forward along the spline shaft (to the right). During the forward movement, the rear baffle and the threaded tube can rotate synchronously, and the rolling bearing can greatly reduce friction.

[0009] As an improvement of this utility model, the sleeve portion is disposed on the end face of the toothed tube. The sleeve portion and the toothed tube are two independent parts, which are welded together to form a rigid whole. The purpose of choosing this design is: as another implementation method, the sleeve portion can also be fixed to the toothed tube by welding. When the second spur gear on the sleeve portion is damaged, only the sleeve portion needs to be replaced, without replacing the toothed tube, because the toothed tube also has long threads, which is more costly.

[0010] As an improvement to this utility model, an intermediate transmission rod is provided behind the long push rod, and an ejector rod is provided behind the intermediate transmission rod. The purpose of this design is: after the part is built up, the rear exit mechanism (another set of devices) pushes the long push rod, the long push rod pushes the intermediate transmission rod, the intermediate transmission rod pushes the ejector rod, the ejector rod pushes the part out of the mold, and the part is held by the robot arm to the next station for continued building up.

[0011] As an improvement of this utility model, the long push rod and the toothed tube are in clearance fit. The purpose of this design is that the long push rod needs to move frequently during the upsetting of each part, and the clearance fit can reduce frictional resistance and improve service life while ensuring accuracy. Attached Figure Description

[0012] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0013] In the attached diagram:

[0014] Figure 1 This is a three-dimensional schematic diagram of the tooth tube adjustment mechanism described in this utility model on the body of the cold heading machine.

[0015] Figure 2 This is an enlarged schematic diagram of part A of the present invention.

[0016] Figure 3 This is a schematic diagram of a conventional dental tube adjustment mechanism described in this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Cold heading machine body; 2. Rotating shaft; 3. Main bevel gear; 4. Secondary bevel gear; 5. Splined shaft; 6. Splined sleeve; 7. First spur gear; 8. Rear baffle; 9. Front baffle; 10. Thread tube; 11. Second spur gear; 12. Sleeve section; 13. External thread; 14. Internal threaded workpiece; 15. Long ejector rod; 16. Rolling bearing; 17. Intermediate transmission rod; 18. Ejector rod; 19. Die; 20. Part to be formed; 21. Extended gear tube. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] Example 1

[0020] Please refer to Figure 1 -3.

[0021] This embodiment provides a threaded tube adjustment mechanism, installed on the cold heading machine body 1, including a rotating shaft 2 as a power source. A main bevel gear 3 is fixedly connected to the rotating shaft 2. The main bevel gear 3 meshes with a secondary bevel gear 4. The secondary bevel gear 4 is fixedly connected to a spline shaft 5. A spline sleeve 6 is sleeved on the outside of the spline shaft 5. A first spur gear 7 (the spur gear penetrates the entire outer ring of the spline sleeve 6) is provided on the outer ring of the spline sleeve 6. A rear baffle 8 and a front baffle 9 are respectively provided at both ends of the spline sleeve 6. The first spur gear 7 meshes with a second spur gear 11 on the threaded tube 10 to transmit torsional force (radial). A sleeve portion 12 that can contact the rear baffle 8 is integrally provided on the threaded tube 10. The second spur gear 11 is provided on the side ring of the sleeve portion 12. A long external thread 13 is provided on the threaded tube 10. An internally threaded workpiece 14 (which is rigidly connected to the cold heading machine body 1 and is considered as one piece) is connected to the threaded tube 10 through the external thread 13. Please refer to Figure 2(To aid understanding, the internally threaded workpiece 14 is shown in the diagram.) When the threaded tube 10 rotates clockwise, the internally threaded workpiece 14 remains stationary, causing the threaded tube 10 to screw in. When the threaded tube 10 rotates counterclockwise, the internally threaded workpiece 14 remains stationary, causing the threaded tube 10 to retract. A long push rod 15 is provided inside the threaded tube 10.

[0022] Please refer to Figure 3 The traditional tooth tube adjustment mechanism, mounted on the cold heading machine body 1, includes a rotating shaft 2 as a power source, on which a main bevel gear 3 (not shown in the diagram for clarity, but connected to...) is fixedly connected. Figure 1 (Same structure), the main bevel tooth 3 meshes with the secondary bevel tooth 4 (not shown in the figure for clarity, but related to...) Figure 1 (Same structure) The auxiliary bevel gear 4 is fixedly connected to an extended gear tube 21. The length of the extended gear tube 21 is at least the maximum displacement distance of the threaded tube 10 (i.e., the length of the upsetting part). Its outer ring is provided with straight teeth that fill the entire length. The extended gear tube 21 drives the sleeve part 12, which is welded to the threaded tube 10, to rotate. The threaded tube 10 is connected to an internally threaded workpiece 14 (which is rigidly connected to the cold heading machine body 1 and is considered as one piece) through an external thread 13. When the threaded tube 10 rotates forward or backward, since the internally threaded workpiece 14 does not move, the threaded tube 10 will move to the right or left while rotating, thereby adapting to parts 20 of different lengths to be upsetting. Its disadvantage is that the extended gear tube 21 needs to be made very long, so the production and processing cost is high, and its weight does not meet the requirements for lightweight parts.

[0023] In the embodiments of this utility model application, please refer to Figure 2 The rear baffle 8 is rotatably connected to the spline sleeve 6 via a rolling bearing 16. When changing to a different length of part to be pressed, the threaded tube 10 retracts (to the left), and after the sleeve portion 12 on the threaded tube 10 is firmly attached to the rear baffle 8, the spline sleeve 6 is pushed to retract (to the left) along the spline shaft 5. During the retraction process, the rear baffle 8 and the threaded tube 10 can rotate synchronously, and the rolling bearing 16 can greatly reduce friction.

[0024] Furthermore, the front baffle 9 is rotatably connected to the spline sleeve 6 via a rolling bearing 16. When changing parts of different lengths to be uptaken, the threaded tube 10 moves forward (to the right). After the sleeve portion 12 on the threaded tube 10 is firmly attached to the front baffle 9, it pushes the spline sleeve 6 forward (to the right) along the spline shaft 5. During the forward movement, the rear baffle 8 and the threaded tube 10 can rotate synchronously, and the rolling bearing 16 can greatly reduce friction.

[0025] In another embodiment, the sleeve portion 12 is disposed on the end face of the threaded tube 10. The sleeve portion 12 and the threaded tube 10 are two independent parts, which are welded together to form a rigid whole. This integral structure, in which the sleeve portion 12 is fixed to the threaded tube 10 by welding, allows for replacement of only the sleeve portion 12 when the second spur gear 11 on the sleeve portion 12 is damaged, without the need to replace the threaded tube 10, as the threaded tube 10 has long threads, which would increase costs.

[0026] Furthermore, an intermediate transmission rod 17 is provided behind the long push rod 15, and an ejector rod 18 is provided behind the intermediate transmission rod 17. After the part is erected, the rear exit mechanism (another set of devices) pushes the long push rod 15, the long push rod 15 pushes the intermediate transmission rod 17, the intermediate transmission rod 17 pushes the ejector rod 18, and the ejector rod 18 pushes the part out of the mold 19. The part is then held by a robotic arm to the next station for further erection. During erection, the part 20 to be erected pushes the ejector rod 18, the ejector rod 18 pushes the intermediate transmission rod 17, and the intermediate transmission rod 17 pushes the long push rod 15 until the part 20 to be erected is placed in.

[0027] Furthermore, the long push rod 15 and the toothed tube 10 are in clearance fit. During the fabrication of each part, the long push rod 15 operates frequently; the clearance fit reduces frictional resistance and extends service life while ensuring accuracy.

[0028] The dental tube adjustment mechanism provided in this embodiment has the following working conditions: the rotating shaft 2 drives the active bevel gear, the active bevel gear drives the passive bevel gear, the passive bevel gear drives the spline shaft 5 to rotate, the spline shaft 5 drives the spline gear sleeved on it to rotate, the outer ring of the spline gear has a first spur gear 7, which drives the second spur gear 11 to rotate, the sleeve part 12 rotates, and the dental tube 10 rotates synchronously.

[0029] When the threaded tube 10 rotates clockwise, since the internally threaded workpiece 14 remains stationary, the threaded tube 10 will screw in (move to the right), and its sleeve portion 12 will collide with the front baffle 9, causing the spline sleeve 6 to move to the right. When the threaded tube 10 rotates counterclockwise, since the internally threaded workpiece 14 remains stationary, the threaded tube 10 will retract. The above describes the working principle of the threaded tube adjustment mechanism for adjusting parts 20 to be upholstered due to their varying lengths.

[0030] The beneficial effects of this utility model are as follows: This new structure significantly reduces the length of the spline shaft 5, which serves as the power source, thus saving on the cost of the parts and making the parts lighter and easier to operate.

[0031] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tooth tube adjustment mechanism, installed on the body (1) of a cold heading machine, comprising a rotating shaft (2) as a power source, wherein a main bevel gear (3) is fixedly connected to the rotating shaft (2), and the main bevel gear (3) meshes with a secondary bevel gear (4), characterized in that: The secondary bevel gear (4) is fixedly connected to a spline shaft (5). A spline sleeve (6) is fitted around the spline shaft (5). A first spur gear (7) is provided on the outer ring of the spline sleeve (6). A rear baffle (8) and a front baffle (9) are provided at both ends of the spline sleeve (6). The first spur gear (7) meshes with a second spur gear (11) on the toothed tube (10) to transmit torsional force. A sleeve portion (12) that can contact the rear baffle (8) is provided on the toothed tube (10). An external thread (13) is provided on the toothed tube (10). An internal thread workpiece (14) is connected through the external thread (13). A long push rod (15) is provided inside the toothed tube (10).

2. The dental tube adjustment mechanism according to claim 1, characterized in that: The rear baffle (8) is rotatably connected to the spline sleeve (6) via a rolling bearing (16).

3. The dental tube adjustment mechanism according to claim 1, characterized in that: The front baffle (9) is rotatably connected to the spline sleeve (6) via a rolling bearing (16).

4. The dental tube adjustment mechanism according to claim 1, characterized in that: The sleeve part (12) is disposed on the end face of the tooth tube (10). The sleeve part (12) and the tooth tube (10) are two independent parts, which are welded together to form a rigid whole.

5. The dental tube adjustment mechanism according to claim 1, characterized in that: An intermediate transmission rod (17) is provided behind the long push rod (15), and an ejector rod (18) is provided behind the intermediate transmission rod (17).

6. The dental tube adjustment mechanism according to claim 1, characterized in that: The long push rod (15) and the tooth tube (10) are in clearance fit.

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