Gear transmission mechanism of press machine and assembly method of transmission mechanism

Abstract

The present invention relates to the technical field of presses, and discloses a gear transmission mechanism of a press and an assembly method of the gear transmission mechanism, wherein the gear transmission mechanism comprises: a main shaft, on which a driving gear is arranged; a first herringbone gear eccentric wheel assembly comprises a first gear hub, a first and a second helical gear, the first helical gear and the second helical gear are connected to both ends of the first gear hub, and the first gear hub is eccentrically arranged with the first and second helical gears; the first helical gear and / or the second helical gear are meshed with the driving gear; a second herringbone gear eccentric wheel assembly comprises a second gear hub, a third and a fourth helical gear, the third helical gear and the fourth helical gear are connected to both ends of the second gear hub, and the second gear hub is eccentrically arranged with the third and fourth helical gears; the third helical gear is meshed with the first helical gear, and the fourth helical gear is meshed with the second helical gear. The advantages of the present invention are that the gear transmission mechanism can be applied to occasions with high speed and high precision requirements, and has high processing and assembly precision.

Description

Technical Field

[0001] The present invention relates to the technical field of presses, and in particular to a gear transmission mechanism of a press and an assembly method of the transmission mechanism. Background Art

[0002] Presses are commonly used in the field of machinery. They can be divided into many types according to the power source, such as hydraulic presses, pneumatic presses, and crank open presses. Among them, for crank open presses, the gear transmission mechanism is its most core power transmission component.

[0003] The traditional double-point eccentric gear press transmission mechanism adopts a spur gear system, but the spur gear has limited load-bearing capacity and high noise under high-speed and large-stroke conditions, and it is difficult to meet the requirements of high-precision and high-speed use. In order to simplify the structure of the double-point eccentric gear press transmission mechanism, in the existing two-meshing gear set, the eccentric wheel and the gear are generally set in an integrated manner, but the processing accuracy and the phase of the eccentric wheel and the gear are difficult to guarantee. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a gear transmission mechanism and an assembly method of the gear transmission mechanism that can be applied to a high-speed, high-precision press with high processing and assembly precision.

[0005] The technical solution adopted by the present invention to solve the technical problem is to provide a gear transmission mechanism of a press, comprising:

[0006] A main shaft, wherein a driving gear is provided on the main shaft;

[0007] The first herringbone gear eccentric wheel assembly comprises a first gear hub, a first bevel gear and a second bevel gear which are separately arranged, wherein the first bevel gear and the second bevel gear are respectively connected to two ends of the first gear hub, and the first gear hub and the first bevel gear and the second bevel gear are all eccentrically arranged; the first bevel gear and / or the second bevel gear are meshed with the driving gear, and the inclination directions of the gear teeth of the first bevel gear and the second bevel gear are opposite;

[0008] The second herringbone eccentric wheel assembly includes a second gear hub, a third bevel gear and a fourth bevel gear which are separately arranged. The third bevel gear and the fourth bevel gear are respectively connected to the two ends of the second gear hub, and the second gear hub and the third bevel gear and the fourth bevel gear are all eccentrically arranged; the inclination directions of the gear teeth of the third bevel gear and the fourth bevel gear are opposite, and the third bevel gear is meshed with the first bevel gear, and the fourth bevel gear is meshed with the second bevel gear.

[0009] Further, the first gear hub has a first eccentric wheel, and the second gear hub has a second eccentric wheel;

[0010] The phase of the first eccentric wheel relative to the first helical gear and the second helical gear is the same as the phase of the second eccentric wheel relative to the third helical gear and the fourth helical gear.

[0011] Furthermore, the first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are each provided with a counterweight, and the position of the counterweight is opposite to the protruding direction of the first eccentric wheel and the second eccentric wheel.

[0012] Furthermore, the main shaft is provided with two driving gears, and one driving gear is meshed with the first bevel gear, and the other driving gear is meshed with the second bevel gear.

[0013] Furthermore, the two driving gears are also helical gears, and the inclination directions of the gear teeth on the two driving gears are opposite, the two driving gears form a herringbone tooth structure, the first helical gear and the second helical gear form a herringbone tooth structure, and the third helical gear and the fourth helical gear form a herringbone tooth structure.

[0014] Furthermore, the first gear hub and the second gear hub are both rotatably connected with a main connecting rod.

[0015] Further, the first helical gear is sleeved on one end of the first gear hub, and the second helical gear is sleeved on the other end of the first gear hub; the third helical gear is sleeved on one end of the second gear hub, and the fourth helical gear is sleeved on the other end of the second gear hub;

[0016] A connecting pin for transmitting torque is provided between the first gear hub and the first helical gear, between the first gear hub and the second helical gear, between the second gear hub and the third helical gear, and between the second gear hub and the fourth gear hub;

[0017] The first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are all fastened to the first gear hub or the second gear hub via a fixing nut.

[0018] Furthermore, the first herringbone gear eccentric wheel assembly further includes a first central axis, the second herringbone gear eccentric wheel assembly further includes a second central axis, and the first central axis, the second central axis and the main axis are arranged in parallel;

[0019] The first gear hub is mounted on the first central axis and can rotate around the first central axis; the second gear hub is mounted on the second central axis and can rotate around the second central axis.

[0020] The technical solution adopted by the present invention to solve the technical problem is to provide a method for assembling a gear transmission mechanism, which is applied to the gear transmission mechanism of the above-mentioned press and is performed with the aid of an auxiliary frame. The assembly method includes:

[0021] Install the assembled main shaft and driving gear on the auxiliary frame;

[0022] The first helical gear and the second helical gear are respectively mounted at both ends of the first gear hub, and the phases of the first gear hub relative to the first helical gear and the second helical gear are adjusted to be equal; and the first herringbone gear eccentric wheel assembly is mounted on the auxiliary frame through the first central axis, and the first helical gear and the second helical gear are respectively meshed with a driving gear;

[0023] The third bevel gear and the fourth bevel gear are respectively installed at both ends of the second gear hub, and the phase of the second gear hub relative to the third bevel gear and the fourth bevel gear is adjusted to make their phases equal; and the second herringbone eccentric wheel assembly is mounted on the auxiliary frame through the second center axis, the third bevel gear is meshed with the first bevel gear, and the fourth bevel gear is meshed with the second bevel gear; and the phase of the second gear hub relative to the third bevel gear and the fourth bevel gear is adjusted to be equal to the phase of the first gear hub relative to the first bevel gear and the second bevel gear.

[0024] Furthermore, after the main shaft, the first herringbone gear eccentric wheel assembly and the second herringbone gear eccentric wheel assembly are installed on the auxiliary frame, the position of the first helical gear or the second helical gear or the third helical gear or the fourth helical gear can be adjusted by adjusting the fixing nut.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] In the present invention, the first herringbone gear eccentric wheel assembly is composed of a first bevel gear and a second bevel gear with opposite gear teeth inclination directions, which are respectively assembled at two ends of the first gear hub to form a herringbone gear eccentric wheel structure; the second herringbone gear eccentric wheel assembly is composed of a third bevel gear and a fourth bevel gear with opposite gear teeth inclination directions, which are respectively assembled at two ends of the second gear hub to form another herringbone gear eccentric wheel structure; the first herringbone gear eccentric wheel assembly, the second eccentric wheel assembly and the main shaft are assembled to form the double-point herringbone gear eccentric gear transmission mechanism of the present scheme, which can be applied to presses with high precision and high speed requirements. In addition, the first herringbone gear eccentric wheel assembly and the second herringbone gear eccentric wheel assembly in this scheme change the traditional integrated setting to a split setting, which can effectively ensure the processing accuracy of each helical gear, and can conveniently adjust the phase of the first eccentric wheel relative to the first helical gear and the second helical gear, and adjust the phase of the second eccentric wheel relative to the third helical gear and the fourth helical gear, so as to further make the phases of the two be the same, that is, the processing accuracy of the helical gears is ensured, and the assembly accuracy of the transmission mechanism is ensured by the split setting and the auxiliary frame. When the gear transmission mechanism is installed in the auxiliary frame, the phase of the second eccentric wheel in the second herringbone gear eccentric wheel assembly can be adjusted to adapt to the phase of the first eccentric wheel to ensure the consistency of the phases of the two. A counterweight is set on the four transmission helical gears in the opposite direction of the protruding direction of the first eccentric wheel and the second eccentric wheel to ensure the stability of the transmission mechanism during the high-speed rotation of the transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the gear transmission mechanism of the present invention;

[0028] Figure 2 It is an assembly diagram of the first herringbone gear eccentric wheel assembly and the second herringbone gear eccentric wheel assembly;

[0029] Figure 3 for Figure 2 A front view of

[0030] Figure 4 This is a schematic diagram of the gear transmission mechanism after being installed in the auxiliary frame;

[0031] Figure 5 for Figure 4 Bottom view of

[0032] Figure 6 for Figure 4 Left view of

[0033] Figure 7 It is a partial cross-sectional view of the gear transmission mechanism after being installed in the auxiliary frame;

[0034] Figure 8 It is a schematic diagram of the assembly of the main shaft and the first herringbone gear eccentric wheel assembly;

[0035] Fig. 9 It is a structural schematic diagram of the first herringbone gear eccentric wheel assembly or the second herringbone gear eccentric wheel assembly.

[0036] In the figure,

[0037] 1. Main shaft; 10. Driving gear; 11. Front bearing seat; 12. Front bearing; 13. Flywheel bearing; 14. Rear bearing;

[0038] 2. first herringbone gear eccentric wheel assembly; 20. first gear hub; 201. first eccentric wheel; 21. first helical gear; 22. second helical gear; 23. first central shaft; 230. counterweight; 231. main connecting rod;

[0039] 3. Second herringbone gear eccentric wheel assembly; 30. Second gear hub; 301. Second eccentric wheel; 31. Third helical gear; 32. Fourth helical gear; 33. Second center shaft;

[0040] 4. Connecting pin;

[0041] 5. Fix the nut;

[0042] 6. Auxiliary rack. DETAILED DESCRIPTION

[0043] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] Embodiment 1:

[0049] like Figure 1-Figure 3 and Figure 8-Figure 9As shown, a gear transmission mechanism of a press machine includes: a main shaft 1, a first herringbone gear eccentric wheel assembly 2 and a second herringbone gear eccentric wheel assembly 3. Among them: the main shaft 1, the main shaft 1 is provided with a driving gear 10, and the main shaft 1 is provided with two driving gears 10; the first herringbone gear eccentric wheel assembly 2 includes a first gear hub 20, a first bevel gear 21 and a second bevel gear 22 which are separately arranged, and the first bevel gear 21 and the second bevel gear 22 are respectively connected to the two ends of the first gear hub 20, and the first gear hub 20 and the first bevel gear 21 and the second bevel gear 22 are all eccentrically arranged; specifically, the first gear hub 20 has a first eccentric wheel 201, and the first eccentric wheel 202 is provided on the first gear hub 20. The wheel 201 is a part of the first gear hub 20. A sleeve is extended from both ends of the first gear hub 20. The first bevel gear 21 and the second bevel gear 22 are respectively sleeved on the sleeve. The first eccentric wheel 201 is located between the first bevel gear 21 and the second bevel gear 22. The first bevel gear 21 and the second bevel gear 22 are symmetrically arranged at both ends of the first eccentric wheel 201. During high-speed rotation, the centrifugal force of the first eccentric wheel 201 is relatively large. The symmetrical arrangement of the first bevel gear 21 and the second bevel gear 22 ensures the force balance of the first herringbone eccentric wheel assembly 2. The first bevel gear 21 and / or the second bevel gear 22 mesh with the driving gear 10. In other words, when one driving gear 10 is provided, it can mesh with the first bevel gear 21 or the second bevel gear 22. In this solution, it is optimal that two driving gears 10 are provided on the main shaft 1, and one driving gear 10 meshes with the first bevel gear 21, and the other driving gear 10 meshes with the second bevel gear 22. The two driving gears 10 mesh with the first bevel gear 21 and the second bevel gear 22 respectively to ensure meshing balance, and the inclination directions of the teeth of the first bevel gear 21 and the second bevel gear 22 are opposite; that is, the first bevel gear 21 and the second bevel gear 22 form a herringbone gear structure in space, which can withstand a larger load than a traditional spur gear, and has a smooth meshing and low noise. The second herringbone eccentric wheel assembly 3 includes a second gear hub 30, a third bevel gear 31 and a fourth bevel gear 32 which are separately arranged. The third bevel gear 31 and the fourth bevel gear 32 are respectively connected to the two ends of the second gear hub 30. Similarly, the second gear hub 30 has a second eccentric wheel 301, which is a part of the second gear hub 30. The two ends of the second gear hub 30 protrude out of the sleeve respectively. The third bevel gear 31 and the fourth bevel gear 32 are respectively sleeved on the sleeves at the two ends of the second gear hub 30, and the second gear hub 30 and the third bevel gear 31 and the fourth bevel gear 32 are all eccentrically arranged; the gear teeth of the third bevel gear 31 and the fourth bevel gear 32 are in opposite inclination directions, and the third bevel gear 31 is meshed with the first bevel gear 21, and the fourth bevel gear 32 is meshed with the second bevel gear 22.

[0050] Among them, the first bevel gear 21 and the second bevel gear 22 form a herringbone gear structure, and the third bevel gear 31 and the fourth bevel gear 32 form a herringbone gear structure, that is, the first bevel gear 21, the second bevel gear 22, the third bevel gear 31 and the fourth bevel gear 32 constitute the double-point herringbone gear eccentric gear transmission mechanism of this scheme, further, the two driving gears 10 are also bevel gears, and the inclination directions of the gear teeth on the two driving gears 10 are opposite, and the two driving gears 10 also form a herringbone gear structure. The phase of the first eccentric wheel 201 relative to the first bevel gear 21 and the second bevel gear 22 is the same as the phase of the second eccentric wheel 301 relative to the third bevel gear 31 and the fourth bevel gear 32.

[0051] In actual use, in the gear transmission mechanism of the present press, the first herringbone gear eccentric wheel assembly 2 is composed of a first bevel gear 21 and a second bevel gear 22 with opposite gear teeth inclination directions, which are respectively assembled at the two ends of the first gear hub 20 to form a herringbone gear eccentric wheel structure; the second herringbone gear eccentric wheel assembly 3 is composed of a third bevel gear 31 and a fourth bevel gear 32 with opposite gear teeth inclination directions, which are respectively assembled at the two ends of the second gear hub 30 to form another herringbone gear eccentric wheel structure; the first herringbone gear eccentric wheel assembly 2, the second eccentric wheel 301 assembly and the main shaft 1 are assembled to form the double-point herringbone gear eccentric gear transmission mechanism of the present scheme, which can be applied to presses with high precision and high speed requirements. Moreover, the first herringbone eccentric wheel assembly 2 and the second herringbone eccentric wheel assembly 3 in the present scheme change the traditional integrated setting to a split setting, which can effectively ensure the processing accuracy of each bevel gear, and can conveniently adjust the phase of the first eccentric wheel 201 relative to the first bevel gear 21 and the second bevel gear 22, and adjust the phase of the second eccentric wheel 301 relative to the third bevel gear 31 and the fourth bevel gear 32, so as to further make the phases of the two be the same, that is, to ensure the processing accuracy of the bevel gears, and to ensure the assembly accuracy of the transmission mechanism through the split setting and with the help of the auxiliary frame 6. When the gear transmission mechanism is installed in the auxiliary frame 6, the phase of the second eccentric wheel 301 in the second herringbone eccentric wheel assembly 3 can be adjusted to adapt to the phase of the first eccentric wheel 201, so as to ensure the consistency of the phases of the two and ensure the transmission accuracy of the transmission mechanism. The herringbone gear is difficult to process and measure, and the traditional transmission mechanism cannot meet the process requirements of processing and assembly. The double-point herringbone gear eccentric gear transmission mechanism can effectively solve this problem, ensure the processing and assembly accuracy, ensure the transmission quality, and make the gear transmission mechanism suitable for high-precision and high-speed presses.

[0052] like Figure 1 and Figure 4As shown, the first bevel gear 21, the second bevel gear 22, the third bevel gear 31 and the fourth bevel gear 32 are all provided with a counterweight 230, the position of the counterweight 230 is opposite to the protruding direction of the first eccentric wheel 201 and the second eccentric wheel 301, and the first gear hub 20 and the second gear hub 30 are both rotatably connected with a main connecting rod 231. During the operation of the gear transmission mechanism, the counterweight 230 is arranged on the four transmission bevel gears in the opposite direction of the protruding direction of the first eccentric wheel 20 and the second eccentric wheel, so as to ensure the stability of the transmission mechanism during the high-speed rotation of the transmission mechanism. It needs to be explained that a counterweight 230 is provided on the first bevel gear 21 and the second bevel gear 22 in a direction opposite to the protruding direction of the first eccentric wheel 201, and the counterweight 230 can effectively balance the centrifugal force of the first eccentric wheel 201 during high-speed rotation, thereby ensuring the balance of the first herringbone eccentric wheel assembly 2; a counterweight 230 is provided on the third bevel gear 31 and the fourth bevel gear 32 in a direction opposite to the protruding direction of the second eccentric wheel 301, and the counterweight 230 can effectively balance the centrifugal force of the second eccentric wheel 301 during high-speed rotation, thereby ensuring the balance of the second herringbone eccentric wheel assembly 3.

[0053] like Figure 4 and Figure 6-Figure 9 As shown, the first bevel gear 21 is sleeved on one end of the first gear hub 20, and the second bevel gear 22 is sleeved on the other end of the first gear hub 20; the third bevel gear 31 is sleeved on one end of the second gear hub 30, and the fourth bevel gear 32 is sleeved on the other end of the second gear hub 30; and a connecting pin 4 for transmitting torque is provided between the first gear hub 20 and the first bevel gear 21, between the first gear hub 20 and the second bevel gear 22, between the second gear hub 30 and the third bevel gear 31, and between the second gear hub 30 and the fourth gear hub; that is, a connecting pin 4 for transmitting torque is provided in each of the four transmission bevel gears. The first bevel gear 21, the second bevel gear 22, the third bevel gear 31 and the fourth bevel gear 32 are all pressed against the first gear hub 20 or the second gear hub 30 through a fixing nut 5. When actually adjusting the phase of the first eccentric wheel 201 and the second eccentric wheel 301, the fixing nut 5 can be loosened, adjusted, and then tightened after adjusting to meet the use requirements, so that the adjustment is convenient. The first herringbone gear eccentric wheel assembly 2 further includes a first central axis 23, and the second herringbone gear eccentric wheel assembly 3 further includes a second central axis 33. The first central axis 23, the second central axis 33 and the main shaft 1 are arranged in parallel to ensure reliable power transmission and low loss. The first gear hub 20 is sleeved on the first central axis 23 and can rotate around the first central axis 23; the second gear hub 30 is sleeved on the second central axis 33 and can rotate around the second central axis 33.

[0054] It needs to be further explained that the main shaft 1 is also provided with a front bearing seat 11, a front bearing 12, a flywheel bearing 13 and a rear bearing 14. The front bearing seat 11 and the flywheel bearing 13 are respectively equipped with the front bearing 12 and the rear bearing 14 for supporting the main shaft 1. The main shaft 1 assembly is fixed in the frame by the front bearing seat 11 and the flywheel bearing 13. The main shaft 1 can rotate freely, and through the herringbone gear meshing, it drives the first herringbone gear eccentric wheel assembly to rotate, thereby transmitting the power. That is, in the actual transmission process, the power element drives the main shaft 1 to rotate, and the main shaft 1 engages with the first bevel gear 21 and the second bevel gear 22 through the driving gear 10, thereby driving the first herringbone gear eccentric wheel assembly 2 to rotate, and then the first bevel gear 21 engages with the third bevel gear 31, and the second bevel gear 22 engages with the fourth bevel gear 32, thereby driving the second herringbone gear eccentric wheel assembly 3 to rotate, and the power is transmitted from the first eccentric wheel 201 and the second eccentric wheel 301. Since the press has high requirements on the consistency of the power transmission, the phases of the first eccentric wheel 201 and the second eccentric wheel 301 must be consistent to ensure a good transmission effect.

[0055] Embodiment 2:

[0056] like Figure 4-Figure 9 As shown, a method for assembling a gear transmission mechanism is applied to the gear transmission mechanism of the above press and is performed with the aid of an auxiliary frame 6. The assembly method includes:

[0057] The assembled main shaft 1 and the driving gear 10 are mounted on the auxiliary frame 6; wherein the main shaft 1 is supported on the auxiliary frame 6 by the front bearing 12, the rear bearing 14, the front bearing seat 11 and the flywheel shaft. Since it is at the bottom of the first herringbone gear eccentric wheel assembly 2 and the second herringbone gear eccentric wheel assembly 3, the structure can be made more compact and occupy less space.

[0058] The first bevel gear 21 and the second bevel gear 22 are respectively mounted on both ends of the first gear hub 20, and the phases of the first gear hub 20 relative to the first bevel gear 21 and the second bevel gear 22 are adjusted to make their phases equal; and the first herringbone gear eccentric wheel assembly 2 is mounted on the auxiliary frame 6 through the first center shaft 23, and the first bevel gear 21 and the second bevel gear 22 are respectively meshed with a driving gear 10; the first herringbone gear eccentric wheel assembly 2 is mounted in the auxiliary frame 6 through the first center shaft 23, and can be meshed and driven by the main shaft 1, and the fixing nut 5 ensures that the first bevel gear 21 and the second bevel gear 22 will not shift left and right, thereby ensuring the stability of the structure.

[0059] The third bevel gear 31 and the fourth bevel gear 32 are respectively mounted on both ends of the second gear hub 30, and the phase of the second gear hub 30 relative to the third bevel gear 31 and the fourth bevel gear 32 is adjusted to make the phases equal; and the second herringbone gear eccentric wheel assembly 3 is mounted on the auxiliary frame 6 through the second center shaft 33, the third bevel gear 31 is meshed with the first bevel gear 21, and the fourth bevel gear 32 is meshed with the second bevel gear 22; and the phase of the second gear hub 30 relative to the third bevel gear 31 and the fourth bevel gear 32 is adjusted to be equal to the phase of the first gear hub 20 relative to the first bevel gear 21 and the second bevel gear 22. Compared with the integrated gear transmission mechanism, the present gear transmission mechanism can be adjusted later, and can also make up for the situation of inadequate processing. Similarly, the second herringbone gear eccentric wheel assembly 3 is mounted in the auxiliary frame 6 through the second center shaft 33.

[0060] During the assembly process, after the main shaft 1, the first herringbone gear eccentric wheel assembly 2 and the second herringbone gear eccentric wheel assembly 3 are installed on the auxiliary frame 6, the position of the first bevel gear 21 or the second bevel gear 22 or the third bevel gear 31 or the fourth bevel gear 32 can be adjusted by adjusting the fixing nut 5.

[0061] In this solution, the gear transmission mechanism can be used in a press machine assembly with high speed and high precision, and has high processing and assembly precision.

[0062] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A gear transmission mechanism for a press, characterized in that: include: A main shaft, wherein a driving gear is provided on the main shaft; The first herringbone gear eccentric wheel assembly comprises a first gear hub, a first bevel gear and a second bevel gear which are separately arranged, wherein the first bevel gear and the second bevel gear are respectively connected to two ends of the first gear hub, and the first gear hub and the first bevel gear and the second bevel gear are all eccentrically arranged; the first bevel gear and / or the second bevel gear are meshed with the driving gear, and the inclination directions of the gear teeth of the first bevel gear and the second bevel gear are opposite; A second herringbone gear eccentric wheel assembly, comprising a second gear hub, a third helical gear and a fourth helical gear which are separately arranged, wherein the third helical gear and the fourth helical gear are respectively connected to two ends of the second gear hub, and the second gear hub and the third helical gear and the fourth helical gear are all eccentrically arranged; the gear teeth of the third helical gear and the fourth helical gear are inclined in opposite directions, and the third helical gear is meshed with the first helical gear, and the fourth helical gear is meshed with the second helical gear; The first gear hub has a first eccentric wheel, and the second gear hub has a second eccentric wheel; the phase of the first eccentric wheel relative to the first helical gear and the second helical gear is the same as the phase of the second eccentric wheel relative to the third helical gear and the fourth helical gear; The first gear hub and the second gear hub are both rotatably connected with a main connecting rod.

2. The gear transmission mechanism of a press machine according to claim 1, characterized in that: The first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are all provided with a counterweight block, and the position of the counterweight block is opposite to the protruding direction of the first eccentric wheel and the second eccentric wheel.

3. A gear transmission mechanism for a press machine according to claim 1 or 2, characterized in that: The main shaft is provided with two driving gears, one of which is meshed with the first bevel gear, and the other of which is meshed with the second bevel gear.

4. The gear transmission mechanism of a press machine according to claim 3, characterized in that: The two driving gears are also helical gears, and the inclination directions of the gear teeth on the two driving gears are opposite. The two driving gears form a herringbone gear structure. The first helical gear and the second helical gear form a herringbone gear structure, and the third helical gear and the fourth helical gear form a herringbone gear structure.

5. The gear transmission mechanism of a press machine according to claim 1, characterized in that: The first helical gear is sleeved on one end of the first gear hub, and the second helical gear is sleeved on the other end of the first gear hub; the third helical gear is sleeved on one end of the second gear hub, and the fourth helical gear is sleeved on the other end of the second gear hub; A connecting pin for transmitting torque is provided between the first gear hub and the first helical gear, between the first gear hub and the second helical gear, between the second gear hub and the third helical gear, and between the second gear hub and the fourth gear hub; The first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear are all fastened to the first gear hub or the second gear hub via a fixing nut.

6. The gear transmission mechanism of a press machine according to claim 5, characterized in that: The first herringbone gear eccentric wheel assembly further includes a first central axis, and the second herringbone gear eccentric wheel assembly further includes a second central axis, and the first central axis, the second central axis and the main axis are arranged in parallel; The first gear hub is mounted on the first central axis and rotates around the first central axis; the second gear hub is mounted on the second central axis and rotates around the second central axis.

7. A method for assembling a gear transmission mechanism, applied to the gear transmission mechanism of a press as claimed in claim 6, and performed with the aid of an auxiliary frame, characterized in that: The assembly method comprises: Install the assembled main shaft and driving gear on the auxiliary frame; The first helical gear and the second helical gear are respectively mounted at both ends of the first gear hub, and the phases of the first gear hub relative to the first helical gear and the second helical gear are adjusted to be equal; and the first herringbone gear eccentric wheel assembly is mounted on the auxiliary frame through the first central axis, and the first helical gear and the second helical gear are respectively meshed with a driving gear; The third bevel gear and the fourth bevel gear are respectively installed at both ends of the second gear hub, and the phase of the second gear hub relative to the third bevel gear and the fourth bevel gear is adjusted to make their phases equal; and the second herringbone eccentric wheel assembly is mounted on the auxiliary frame through the second center axis, the third bevel gear is meshed with the first bevel gear, and the fourth bevel gear is meshed with the second bevel gear; and the phase of the second gear hub relative to the third bevel gear and the fourth bevel gear is adjusted to be equal to the phase of the first gear hub relative to the first bevel gear and the second bevel gear.

8. The method for assembling a gear transmission mechanism according to claim 7, characterized in that: After the main shaft, the first herringbone gear eccentric wheel assembly and the second herringbone gear eccentric wheel assembly are installed on the auxiliary frame, the position of the first helical gear, the second helical gear, the third helical gear or the fourth helical gear is adjusted by adjusting the fixing nut.

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