Accurate universal pressure tooth structure device

Abstract

The utility model discloses a precision universal pressure tooth structure device belongs to the field of machining pressure tooth equipment, and it aims at solving the problems of easy pressure deviation, complicated operation, low efficiency and poor versatility of the existing pressure tooth process. The device comprises a pedestal, a worm engaging machining table bottom end sector worm wheel in the pedestal upper base, a connecting seat of an electric push rod output end connected with a pressing rod is fixedly connected to the pedestal, a hollow connecting shaft of a hollow connecting block driven by a motor on one side of the connecting seat, four pressing rods are equidistantly arranged in the hollow connecting block, a hollow connecting shaft is connected with a hollow air inlet disc through an air pump, a jack, a spring and a plug are arranged in the pressing rod, and a cam of a fixed shaft end portion fixedly connected to the connecting seat extends into the hollow connecting block. During work, the fixed wheel body is adjusted to the machining table angle and the pressing rod height, the motor drives the pressing rod to rotate, the cam cooperates with the air pump to form negative pressure suction tooth pieces for the pressing rod, and the multiple pressing rods realize pressure combination and gear mounting in parallel.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing gear pressing equipment technology, specifically a precision universal gear pressing structure device. Background Technology

[0002] Currently, the traditional process of "pre-positioning + pressing" is widely used in the industrial field for pressing carbide teeth and roller cones. Taking the pressing of carbide teeth for mining tri-cone drill bits as an example, the process is usually as follows: first, the wheel body is fixed and the angle of the processing table is adjusted manually or by a simple mechanical structure. After the angle is calibrated, the worker manually places the tooth into the tooth hole of the wheel body for preliminary alignment. Finally, the pressing mechanism (such as a hydraulic rod or cylinder) is activated to complete the pressing. This type of process is widely used. Even though some equipment (such as the relevant pressing patent CN206230224U applied for in 2016) optimizes the angle adjustment accuracy through worm gear-rack transmission or adds a guide sleeve to assist in positioning, the core logic still does not deviate from the serial process of "adjusting the angle first, then placing the tooth, and finally pressing" and no special structure is designed for the stability of the tooth during the pressing process.

[0003] With increasing demands for precision machining of parts (such as controlling the interference fit tolerance between the gear and the tooth hole to 0.02-0.05mm) and production efficiency, the defects of the existing gear pressing process have become increasingly apparent. The most prominent issue is the frequent occurrence of gear misalignment during the pressing process: the gear is initially positioned by "manual insertion into the tooth hole," lacking a stable clamping or adsorption structure. The vibration generated by the power impact of the equipment when the pressing mechanism starts, as well as the contact reaction force between the gear and the inner wall of the tooth hole at the moment of pressing, cause small, lightweight gears (especially small carbide gears) to shift horizontally or tilt within the tooth hole. This results in the pressure center of the pressing mechanism not coinciding with the gear axis, ultimately leading to uneven gear fit, tooth hole cracking, or inconsistent gear protrusion height. Furthermore, these misalignment problems are often only discovered after pressing, requiring rework to remove the gear and repair the tooth hole, increasing material waste and extending the production cycle. Even adding guide sleeves only assists in initial positioning and cannot counteract the vibration effects, leaving the risk of misalignment unresolved.

[0004] To address this, we propose a precision universal tooth pressing structure device. Utility Model Content

[0005] The purpose of this invention is to provide a precise universal tooth pressing structure device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a precision universal pressure tooth structure device, comprising: a base, an electric push rod, and an air pump. A base is fixedly connected to the top of the base, and a worm gear is rotatably connected inside the base. A processing table is slidably connected to the top of the base, and a sector-shaped worm wheel is fixedly connected to the bottom of the processing table. The sector-shaped worm wheel meshes with the worm gear. An electric push rod is fixedly connected to the top of the base, and the output end of the electric push rod passes through the base and is fixedly connected to a connecting seat. Several pressing rods are installed inside the connecting seat. An air pump is fixedly connected to the top of the base, and the air pump is connected to the pressing rods through a pipe, so that a negative pressure is formed inside the pressing rods.

[0007] Preferably, a gear tooth is fixedly installed on the top of the processing table.

[0008] Preferably, a hollow connecting shaft is rotatably connected inside the connecting seat, and a hollow connecting block is fixedly connected to the middle of the hollow connecting shaft. The interior of the hollow connecting shaft communicates with the hollow connecting block, and the four pressing rods are equidistantly installed on the outside of the hollow connecting block, and the four pressing rods communicate with the hollow connecting block.

[0009] Preferably, a motor is fixedly connected to one side of the connecting seat, and the output end of the motor extends into the connecting seat and is fixedly connected to one end of the hollow connecting shaft.

[0010] Preferably, the hollow connecting shaft has an air inlet at one end near the motor, and a hollow air inlet disc is fixedly connected inside the connecting seat. The interior of the hollow air inlet disc is connected to the air inlet, and the hollow air inlet disc is connected to the air pump air inlet through a pipe.

[0011] Preferably, the pressing rod has a groove inside, a top rod is slidably connected to the inner wall of the groove, a plug is fixedly connected to the top of the top rod, a top block is fixedly connected to the end of the plug away from the top rod, and a spring is sleeved on the outer wall of the top rod, with the two ends of the spring fixedly connected to the inner wall of the groove and one side of the plug, respectively.

[0012] Preferably, a fixed shaft is fixedly connected to the bottom of the connecting seat, and one end of the fixed shaft extends into the hollow connecting block and is fixedly connected to a cam.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Stable positioning is achieved through dual technical means: First, by using the linkage structure of the push rod, spring and plug, in conjunction with the air pump-hollow air intake plate air circuit system, when the pressing rod rotates to the working position, the contact change between the cam and the top block triggers the formation of negative pressure, so that the toothed part is firmly attracted to the end of the pressing rod, avoiding loosening during the transfer process; Second, through the precise stroke control of the electric push rod, it is ensured that the axis of the toothed part is collinear with the axis of the pressing rod during pressing, thus offsetting the vibration effect caused by the power impact.

[0015] 2. When the first pressing rod performs the pressing operation, adjacent pressing rods can simultaneously install the gears, achieving parallel "pressing-gear installation" operations. Taking the machining of a 12-hole tri-cone drill bit as an example, the existing process requires 24-36 minutes. This device, through multi-station collaboration, reduces the total time to less than 15 minutes, increasing hourly output from 3-5 pieces to 12-15 pieces, and improving equipment utilization by 300%. Simultaneously, the operational intensity of angle adjustment and gear installation is reduced, significantly decreasing the reliance on operator experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the worm gear structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the hollow connecting block structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the hollow air intake disc structure of this utility model.

[0020] In the diagram: 1. Platform; 2. Base; 3. Worm gear; 4. Machining table; 5. Sector worm wheel; 6. Electric push rod; 7. Connecting seat; 8. Pressing rod; 9. Air pump; 10. Gear tooth; 11. Hollow connecting shaft; 12. Hollow connecting block; 13. Motor; 14. Air inlet; 15. Hollow air inlet plate; 16. Groove; 17. Push rod; 18. Plug; 19. Push block; 20. Spring; 21. Fixed shaft; 22. Cam. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4As shown, a precision universal pressure tooth structure device includes: a base 1, an electric push rod 6, and an air pump 9. A base 2 is fixedly connected to the top of the base 1. A worm gear 3 is rotatably connected inside the base 2. A processing table 4 is slidably connected to the top of the base 2. A sector worm wheel 5 is fixedly connected to the bottom of the processing table 4. The sector worm wheel 5 meshes with the worm gear 3. An electric push rod 6 is fixedly connected to the top of the base 1. The output end of the electric push rod 6 passes through the base 1 and is fixedly connected to a connecting seat 7. Several pressing rods 8 are installed inside the connecting seat 7. An air pump 9 is fixedly connected to the top of the base 1. The air pump 9 is connected to the several pressing rods 8 through pipes, so that a negative pressure is formed inside the pressing rods 8. A tooth 10 is fixedly installed on the top of the processing table 4.

[0023] A hollow connecting shaft 11 is rotatably connected inside the connecting seat 7. A hollow connecting block 12 is fixedly connected to the middle of the hollow connecting shaft 11. The interior of the hollow connecting shaft 11 is connected to the hollow connecting block 12. The four pressing rods 8 are equidistantly installed on the outside of the hollow connecting block 12. The four pressing rods 8 are connected to the hollow connecting block 12.

[0024] A motor 13 is fixedly connected to one side of the connecting seat 7. The output end of the motor 13 extends into the interior of the connecting seat 7 and is fixedly connected to one end of the hollow connecting shaft 11.

[0025] The hollow connecting shaft 11 has an air inlet 14 at one end near the motor 13. A hollow air inlet plate 15 is fixedly connected inside the connecting seat 7. The interior of the hollow air inlet plate 15 is connected to the air inlet 14. The hollow air inlet plate 15 is connected to the air pump 9 through a pipe.

[0026] The pressing rod 8 has a groove 16 inside. A top rod 17 is slidably connected to the inner wall of the groove 16. A plug 18 is fixedly connected to the top of the top rod 17. A top block 19 is fixedly connected to the end of the plug 18 away from the top rod 17. A spring 20 is sleeved on the outer wall of the top rod 17. The two ends of the spring 20 are fixedly connected to the inner wall of the groove 16 and one side of the plug 18, respectively.

[0027] A fixed shaft 21 is fixedly connected to the bottom end of the connecting seat 7, and one end of the fixed shaft 21 extends into the hollow connecting block 12 and is fixedly connected to a cam 22.

[0028] Working principle:

[0029] I. Initial Preparations: Wheel Fixing and Foundation Positioning

[0030] First, the wheel to be processed, such as the body of a tricone drill bit, is fixed to the top of the processing table 4 as described in claim 1. The processing table 4 is designed to accommodate wheels of different diameters from 110mm to 310mm. By using bolts or locating pins to limit the movement, it is ensured that there is no relative displacement between the wheel and the processing table 4, laying the foundation for subsequent angle adjustment and pressing accuracy. At the same time, it does not require the replacement of special tooling and can directly match wheels of different specifications, reflecting the versatility of the equipment.

[0031] II. Machining Table Angle Adjustment: Precise Alignment of Worm Gear Drive

[0032] The machining table position adjustment mechanism is activated, and the operator can manually or with motor assistance drive the worm gear 3 inside the base 2 as described in claim 1 to rotate. Because the bottom end of the machining table 4 is fixedly connected to the sector worm wheel 5, and the sector worm wheel 5 meshes with the worm gear 3, according to the deceleration characteristics of the worm gear transmission, the rotational motion of the worm gear 3 can be converted into the precise rotation of the sector worm wheel 5, thereby driving the machining table 4 to move linearly along the sliding guide rail at the top of the base 2.

[0033] This transmission structure enables the machining table to adjust its angle to within 0.5°, and a single angle calibration can be completed in just 30 seconds. It eliminates the need for repeated trial and error alignment, and quickly aligns the wheel's tooth hole with the upper pressing rod 8, solving the problem of "time-consuming angle adjustment" in existing processes and paving the way for efficient subsequent operations.

[0034] III. Press Rod Height Calibration: Precise Stroke Control of the Electric Actuator

[0035] Based on the height of the wheel tooth hole, the electric push rod 6 fixed to the top of the platform 1 as described in claim 1 is activated. The output end of the electric push rod 6 passes through the platform 1 and is fixedly connected to the connecting seat 7. Through programmable stroke control or manual adjustment of the electric push rod 6, the connecting seat 7 and the pressing rod 8 installed below it are driven to rise and fall vertically until the bottom opening of the pressing rod 8 is collinear with the axis of the wheel tooth hole.

[0036] This process ensures that the height positioning error of the pressing rod 8 is ≤0.01mm through the mechanical rigid transmission of the electric push rod 6, which provides a guarantee for the "collinearity of the tooth axis and the pressing rod axis" during subsequent pressing, and avoids the risk of pressure deviation caused by height deviation from the structure.

[0037] IV. Pressing rod rotation drive: Circular station formation based on motor-hollow shaft linkage.

[0038] The motor 13 on one side of the connecting seat 7 as described in claim 4 is started. The output end of the motor 13 extends into the interior of the connecting seat 7 and is fixedly connected to one end of the hollow connecting shaft 11 as described in claim 3. After the motor 13 is powered on, it outputs a stable torque, driving the hollow connecting shaft 11 to rotate on the bearing inside the connecting seat 7. Since the hollow connecting block 12 as described in claim 3 is fixed in the middle of the hollow connecting shaft 11, and the four pressing rods 8 are equidistantly installed on the outside of the hollow connecting block 12, the rotation of the hollow connecting shaft 11 synchronously drives the hollow connecting block 12 and the four pressing rods 8 to rotate circumferentially around the axis of the hollow connecting shaft 11, forming a "circular operation station". The four pressing rods correspond to the "pressing station", "gear mounting station", "transition station" and "reset station" respectively.

[0039] V. Negative Pressure Formation and Gear Fixing: Coordinated Positioning of Cam-Spring-Air Circuit

[0040] During the rotation of the pressing rod 8, the toothed component is stably adsorbed by combining the structure of claims 5, 6, and 7. The specific process is as follows:

[0041] Pre-opening of the air path: Activate the air pump 9 at the top of the base 1 as described in claim 1. The air pump 9 is connected to the hollow air inlet plate 15 inside the connecting seat 7 as described in claim 5 through a pipe. The hollow air inlet plate 15 is sealed and connected to the air inlet 14 at the end of the hollow connecting shaft 11. Then, through the internal channel of the hollow connecting shaft 11-hollow connecting block 12, the air path extends to the inside of the four pressing rods 8, providing the air source basis for the formation of negative pressure.

[0042] Cam-triggered negative pressure: The fixed shaft 21 at the bottom of the connecting seat 7 as described in claim 7 extends into the hollow connecting block 12, and the cam 22 fixed at its end remains stationary. When a pressing rod 8 rotates close to the cam 22, the top block 19 inside the pressing rod 8 as described in claim 6 first contacts the protruding part of the cam 22. The top block 19 pushes the plug 18 and the top rod 17 to move towards the bottom of the pressing rod 8, compressing the spring 20 on the outside of the top rod 17. When the pressing rod 8 continues to rotate to the non-protruding part of the cam 22, the spring 20 elastically returns to its original position, pulling the plug 18 to move into the pressing rod 8, increasing the internal space volume of the pressing rod 8. Combined with the suction action of the air pump 9, a stable negative pressure is formed.

[0043] Tooth adsorption: The operator rotates the corresponding pressing rod at the "tooth loading station" to a position that is easy to operate, and puts the tooth to be pressed, such as a carbide tooth, into the opening at the bottom of the pressing rod 8. The negative pressure directly adsorbs and fixes the tooth, avoiding the tooth from shifting due to vibration during the transfer process, and solving the problem of "easy pressure deviation when manually positioned" in the existing process from the root.

[0044] VI. Multi-station parallel operation: pressing and gear assembly are carried out simultaneously.

[0045] By relying on the cyclic rotation of the four pressing rods 8, the parallel operation of "pressing-tooth assembly" is achieved:

[0046] Pressing station: The pressing rod 8 that adsorbs the toothed part rotates to the pressing station directly above the processing table 4. The electric push rod 6 pushes the connecting seat 7 downward, so that the pressing rod 8 drives the toothed part to be precisely pressed into the tooth hole of the wheel body, completing the pressing. Because the toothed part keeps its axis aligned with the pressing rod 8 through negative pressure, there is no deviation during pressing, ensuring that the toothed part and the tooth hole fit evenly.

[0047] Tooth assembly station: While the pressing rods are pressing, the adjacent pressing rods 8 rotate to the "tooth assembly station". The operator simultaneously places the next tooth to be pressed into the bottom of the pressing rod. The negative pressure immediately adsorbs and fixes it, and tooth assembly can be carried out without waiting for the pressing to be completed.

[0048] Workstation cycle: After pressing is completed, the electric push rod 6 is reset, and the pressing rod 8 continues to rotate to the "reset station". The cam 22 triggers the top block 19 again, the negative pressure is released, which facilitates the subsequent cycle. At the same time, the third pressing rod 8 enters the "pressing station" and the fourth pressing rod 8 enters the "gear mounting station", forming a continuous cycle.

[0049] Taking the machining of a 12-hole tricone drill bit as an example, this parallel mode reduces the time required for a single cycle of one pressing and one gear setting to only 45 seconds, shortening the total machining time to less than 15 minutes and increasing hourly output to 12-15 pieces. It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision universal tooth pressing structure device, characterized in that, include: A base (1) is fixedly connected to a base (2) at the top of the base (1). A worm gear (3) is rotatably connected inside the base (2). A processing table (4) is slidably connected to the top of the base (2). A sector worm wheel (5) is fixedly connected to the bottom of the processing table (4). The sector worm wheel (5) meshes with the worm gear (3). An electric push rod (6) is fixedly connected to the top of the base (1). The output end of the electric push rod (6) passes through the base (1) and is fixedly connected to a connecting seat (7). Several pressing rods (8) are installed inside the connecting seat (7). An air pump (9) is fixedly connected to the top of the base (1). The air pump (9) is connected to several pressing rods (8) through pipes, so that negative pressure is formed inside the pressing rods (8).

2. The precision universal tooth pressing structure device according to claim 1, characterized in that: The top of the processing table (4) is fixedly equipped with a toothed wheel (10).

3. The precision universal tooth pressing structure device according to claim 1, characterized in that: A hollow connecting shaft (11) is rotatably connected inside the connecting seat (7). A hollow connecting block (12) is fixedly connected in the middle of the hollow connecting shaft (11). The hollow connecting shaft (11) communicates with the hollow connecting block (12). The four pressing rods (8) are equidistantly installed on the outside of the hollow connecting block (12). The four pressing rods (8) communicate with the hollow connecting block (12).

4. The precision universal tooth pressing structure device according to claim 3, characterized in that: A motor (13) is fixedly connected to one side of the connecting seat (7), and the output end of the motor (13) extends into the interior of the connecting seat (7) and is fixedly connected to one end of the hollow connecting shaft (11).

5. The precision universal tooth pressing structure device according to claim 4, characterized in that: The hollow connecting shaft (11) has an air inlet (14) at one end near the motor (13). The connecting seat (7) has a hollow air inlet plate (15) fixedly connected inside. The hollow air inlet plate (15) is connected to the air inlet (14) inside. The hollow air inlet plate (15) is connected to the air pump (9) through a pipe.

6. The precision universal tooth pressing structure device according to claim 2, characterized in that: The pressing rod (8) has a groove (16) inside. A top rod (17) is slidably connected to the inner wall of the groove (16). A plug (18) is fixedly connected to the top of the top rod (17). A top block (19) is fixedly connected to the end of the plug (18) away from the top rod (17). A spring (20) is sleeved on the outer wall of the top rod (17). The two ends of the spring (20) are fixedly connected to the inner wall of the groove (16) and one side of the plug (18), respectively.

7. The precision universal tooth pressing structure device according to claim 3, characterized in that: A fixed shaft (21) is fixedly connected to the bottom of the connecting seat (7), and one end of the fixed shaft (21) extends into the hollow connecting block (12) and is fixedly connected to a cam (22).

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