A spiral spring set buffer mechanism and buffer system of a radial forging chuck

Abstract

The present application relates to the technical field of radial forging forming, and particularly relates to a spiral spring group buffer mechanism and buffer system of a radial forging chuck, which comprises a first rotating part connected with a main shaft and a second rotating part connected with a worm wheel, a circular annular cavity is formed between the first rotating part and the second rotating part, a plurality of first keys extending radially outward from the outer wall of the first rotating part and a plurality of second keys extending radially inward from the inner wall of the second rotating part divide the circular annular cavity into a plurality of arc spring chambers, one spiral spring is arranged in each arc spring chamber, and the two ends of each spiral spring are connected with the first keys and the second keys respectively. The embodiment of the present application directly arranges the buffer mechanism between the worm wheel and the main shaft, directly absorbs and releases the impact energy in the rotation direction and / or the axial direction through the spiral spring, the energy transmission path is short, the structure is more compact, and therefore the stability and reliability of the system are improved.

Description

Technical Field

[0001] This invention relates to the field of radial forging technology, and more specifically to a helical spring buffer mechanism for a radial forging chuck.

[0002] The present invention also relates to a buffer system for a radial forging chuck. Background Technology

[0003] Radial forging equipment (also known as a precision forging machine) uses four or more synchronously moving hammers to forge workpieces. The workpieces are held in chucks and fed around their axes, achieving high-frequency forging. When the equipment uses multiple hammers for forging, the hammers generate a huge radial impact force at the moment of impact on the workpiece. This impact force is transmitted through the workpiece to the chucks, causing the rotational movement of the chucks and workpieces to be temporarily hindered or even stopped. In order to protect the chuck transmission system and ensure process stability, a buffer mechanism must be installed in the rotation drive system of the chucks.

[0004] The core principle of the existing rotary buffer mechanism is as follows: when forging causes the chuck to stop rotating, the worm wheel on the chuck spindle stops rotating, while the worm driven by the motor continues to rotate. The worm wheel and the worm impact each other, and the impact force is transmitted to the worm through the worm wheel, causing the worm to displace along its axial direction, thereby compressing the elastic element set on the worm to absorb the impact energy.

[0005] This method, which converts the impact force in the rotational direction into axial displacement of the worm gear and then buffers it through an axial elastic element, causes the impact force to act first at the worm gear meshing point, and then be transferred from the worm to the elastic element, resulting in a reduced lifespan of the worm gear. The force transmission path is relatively indirect, requiring passage through multiple mechanical components such as the chuck spindle, worm gear, worm, and elastic element, and involves additional kinematic pairs.

[0006] This indirect energy conversion path may result in a certain lag in the system response. Due to the reduced impact life of the worm gear, a belt drive is required between the motor and the worm to further buffer and absorb vibration, thus increasing the complexity of the structure.

[0007] Therefore, existing technologies require a more direct force transmission path and a buffer mechanism with pre-buffering to improve the lifespan and reliability of the chuck transmission system. Summary of the Invention

[0008] The purpose of this invention is to provide a helical spring buffer mechanism for a radial forging chuck, which places the helical spring assembly on the worm gear. The impact is buffered by the spring between the chuck spindle and the worm gear, eliminating the meshing impact of the worm gear and extending the service life of the chuck worm gear transmission mechanism. The transmission mechanism structure is also compact. Compared with the disc spring assembly, the helical spring assembly can provide a larger buffer amount, better vibration absorption capacity, and the service life of the helical spring assembly is longer than that of the disc spring assembly.

[0009] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A helical spring buffer mechanism for a radial forging chuck includes a worm gear mounted between a drive for the radial forging chuck and a spindle connecting the radial forging chuck: A first rotating part is sleeved on the outside of the main shaft and is connected to the main shaft for transmission. A second rotating part is connected to one end of the worm gear, the first rotating part is nested inside the second rotating part, and an annular cavity is formed between the outer wall of the first rotating part and the inner wall of the second rotating part; A plurality of first keys extending radially outward from the outer wall of the first rotating part and a plurality of second keys extending radially inward from the inner wall of the second rotating part, the first keys and the second keys dividing the annular cavity into a plurality of arc-shaped spring chambers. Several helical springs are disposed inside the arc-shaped spring chamber, and each helical spring is connected at both ends to a first key and a second key, respectively.

[0010] Furthermore, the two ends of the helical spring are connected to the first key and the second key through a fixed connection, a cylindrical pair connection, or a spherical pair connection.

[0011] Furthermore, the first rotating part and the second rotating part can rotate relative to each other but cannot move relative to each other axially; semi-cylindrical sliders are respectively installed at both ends of the helical spring, and cylindrical grooves that cooperate with the semi-cylindrical sliders are formed on the first key and the second key, so that the helical spring can be buffered when compressed.

[0012] Furthermore, the first rotating part and the second rotating part can rotate relative to each other but cannot move relative to each other axially; the two ends of the helical spring are respectively formed with collars, and the first key and the second key are formed with cylindrical rods that cooperate with the collars, so that the helical spring can be buffered when it is stretched.

[0013] Furthermore, the first rotating part and the second rotating part can rotate relative to each other and can move relative to each other axially; hemispherical sliders are respectively installed at both ends of the helical spring, and hemispherical holes that cooperate with the hemispherical sliders are formed on the first key and the second key, so that the helical spring can be buffered when compressed.

[0014] Furthermore, the first rotating part and the second rotating part can rotate relative to each other and can move relative to each other axially; spherical sliders are respectively installed at both ends of the helical spring, and ball holes that cooperate with the spherical sliders are formed on the first key and the second key, so that the helical spring can be buffered when it is stretched.

[0015] A buffer system for a radial forging chuck includes any of the above-mentioned helical spring group buffer mechanisms. A third buffer mechanism is also installed between the worm that drives the worm gear and the motor that drives the worm. The third buffer mechanism is a continuously variable belt drive mechanism.

[0016] The advantages of this invention compared to the prior art are: In embodiments of the present invention, the buffer mechanism is directly disposed between the worm gear and the main shaft. Multiple helical springs arranged along the circumferential direction directly absorb and release the impact energy in the rotational and / or axial directions. The energy transmission path is short and the structure is more compact, thereby improving the stability and reliability of the system. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 A perspective view of the first embodiment of the present invention; Figure 2 This is a top view of the first embodiment of the present invention; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 This is an assembly diagram of the first embodiment of the present invention; Figure 5 This is a perspective view of the second rotating part according to the first embodiment of the present invention; Figure 6 This is a perspective view of the first rotating part according to the first embodiment of the present invention; Figure 7 This is a perspective view of another aspect of the first embodiment of the present invention; Figure 8 This is a perspective view of another working condition according to the first embodiment of the present invention; Figure 9 for Figure 2 A cross-sectional view along the BB direction; Figure 10 This is a perspective view of a rod-type spring according to the first embodiment of the present invention; Figure 11 This is a perspective view of the fourth rotating part according to the first embodiment of the present invention; Figure 12 This is a perspective view of the second embodiment of the present invention; The labels in the diagram represent the following: 1-Worn gear; 2-Main shaft; 3-First buffer mechanism; 31-First rotating part; 32-First key; 33-Second rotating part; 34-Second key; 35-Arc-shaped spring chamber; 36-Cylindrical groove; 37-Helical spring; 38-Semi-cylindrical slider; 4-Second buffer mechanism; 41-Third rotating part; 42-Guide hole; 43-Fourth rotating part; 44-Spline hole; 45-Cylindrical spring chamber; 46-Rod spring; 47-Spline; 48-Sliding sleeve; 5-Third buffer mechanism. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] First embodiment, reference Figures 1 to 11 .

[0021] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The present invention installs a first buffer mechanism 3 between the worm gear 1 and the spindle 2 connecting the jaws or chucks. The first buffer mechanism 3 includes: The buffer mechanism of the helical spring 37 includes several helical springs 37 evenly distributed around the axis of the main shaft 2. Each helical spring 37 is used to generate elastic force "perpendicular to the axis and radial line of the main shaft 2" and to store kinetic energy as potential energy when compressed or stretched while the main shaft 2 does not rotate and the worm gear 1 continues to rotate.

[0022] The helical spring 37 is installed inside an arc-shaped spring chamber 35 formed between the main shaft 2 and the worm gear 1. The arc-shaped spring chamber 35 is formed by an arc-shaped gap between the outer ring of the first rotating part 31 that is fixedly connected to the main shaft 2 and the inner ring of the second rotating part 33 that is fixedly connected to the worm gear 1.

[0023] The first rotating part 31 is a flat cylindrical shape, which is sleeved on the outside of the main shaft 2 and is connected to the main shaft 2 by a key drive.

[0024] The second rotating part 33 is a flat cylindrical shape, which is axially connected to one end of the worm gear 1 and is an integral part of the worm gear 1.

[0025] The first rotating part 31 is nested inside the second rotating part 33, and there is an annular cavity between the outer wall of the first rotating part 31 and the inner wall of the second rotating part 33. The annular cavity is divided into several arc-shaped gaps by a first key 32 extending radially outward from the outer wall of the first rotating part 31 and a second key 34 extending radially inward from the inner wall of the second rotating part 33. Each arc-shaped gap is an arc-shaped spring chamber 35.

[0026] The curved spring chamber 35 is closed, thus ensuring that the helical spring 37 will not fall out of the interior of the curved spring chamber 35.

[0027] The helical spring 37 is embedded inside the arc-shaped spring chamber 35. Both ends of the helical spring 37 are connected to the first key 32 and the second key 34, respectively. The connection method between the helical spring 37 and the first key 32 and the second key 34 can be as follows: 1. Fixed connection (not shown in the diagram): connected by bolts or welding; II. Connection via a cylindrical joint (see reference) Figure 3 The helical spring 37 is equipped with semi-cylindrical sliders 38 at both ends. The axis of the cylindrical surface of the slider is perpendicular to the compression direction of the helical spring 37. The cylindrical surface of the slider matches the cylindrical grooves 36 formed on the first key 32 and the second key 34. When the spring is compressed, it accumulates potential energy.

[0028] 3. Another type of cylindrical joint connection (not shown in the figure): The two ends of the helical spring 37 are respectively formed with a collar, the axis of which is perpendicular to the stretching direction of the helical spring 37. The inner hole of the collar matches the cylindrical rod formed on the first key 32 and the second key 34, and the spring accumulates potential energy when it is stretched.

[0029] IV. A spherical joint connection (not shown in the figure): Hemispherical sliders are installed at both ends of the helical spring 37. The spherical surface of the slider matches the hemispherical hole formed on the first key 32 and the second key 34. When the spring is compressed, it accumulates potential energy.

[0030] V. Another type of spherical joint connection (not shown in the figure): Spherical sliders are installed at both ends of the helical spring 37. The spherical surface of the slider matches the ball hole formed on the first key 32 and the second key 34. When the spring is stretched, it accumulates potential energy.

[0031] Among them, connection methods one, two, and three enable the helical spring 37 to serve as a rotary motion buffer mechanism. In this connection structure, the first rotating part 31 and the second rotating part 33 can only rotate relative to each other and cannot move relative to each other axially. The direction of spring tension or compression is strictly perpendicular to the axis and radial line of the main shaft 2.

[0032] Connection methods four and five enable the helical spring 37 to function not only as a rotary motion buffer mechanism but also as an axial motion buffer mechanism. In this connection structure, the first rotating part 31 and the second rotating part 33 can not only rotate relative to each other but also move relative to each other axially. The direction of the spring's stretching or compression is strictly perpendicular to the radial line of the main shaft 2 and forms an angle of not 90 degrees with the axis of the main shaft 2.

[0033] The first working condition (when the rodless spring 46, or when the rod spring 46 is not connected to the third rotating part 41 and the fourth rotating part 43) is suitable for low-frequency forging.

[0034] Second working condition, reference Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 .

[0035] Based on the aforementioned embodiments, the present invention further includes a second buffer mechanism 4 installed between the worm gear 1 and the spindle 2 connecting the jaws or chucks. The second buffer mechanism 4 includes: The rod spring 46 buffer mechanism includes several rod springs 46 evenly distributed around the axis of the main shaft 2. Each rod spring 46 is used to generate a spring force "perpendicular to the axis and radial line of the main shaft 2", which is used to compress and store kinetic energy as potential energy when the main shaft 2 does not rotate but the worm gear 1 continues to rotate.

[0036] The rod spring 46 is installed inside a cylindrical spring chamber 45 formed between the main shaft 2 and the worm gear 1. The cylindrical spring chamber 45 is formed by a cylindrical gap located between the outer wall of the main shaft 2 and the end of the third rotating part 41 that is fixedly connected to the main shaft 2 and the end of the fourth rotating part 43 that is fixedly connected to the worm gear 1.

[0037] The third rotating part 41 is a flat cylindrical shape, which is sleeved on the outside of the main shaft 2 and is an integral part of the main shaft 2.

[0038] The fourth rotating part 43 is a flat cylindrical shape, which is axially connected to one end of the worm gear 1 and is an integral part of the worm gear 1.

[0039] The cylindrical gap between the end face of the third rotating part 41 and the end face of the fourth rotating part 43 is the cylindrical spring chamber 45.

[0040] The rod spring 46 is located inside the "cylindrical spring chamber 45". The rod spring 46 is a round rod parallel to the main shaft 2. The two ends of the rod spring 46 are connected to the third rotating part 41 and the fourth rotating part 43 respectively. The connection method between the rod spring 46 and the third rotating part 41 and the fourth rotating part 43 can be as follows: 1. Fixed connection: via bolts or welding; 2. Detachable connection: The rod spring 46 is slidably connected to the third rotating part 41. The third rotating part 41 is provided with a guide hole 42, which is slidably engaged with the rod spring 46, allowing the rod spring 46 to slide parallel to the main shaft 2. Furthermore, the rod spring 46 is inserted into the fourth rotating part 43. One end of the rod spring 46 is provided with a spline 47, and the fourth rotating part 43 is provided with a spline hole 44 corresponding to the spline 47. The other end of the rod spring 46 (the end of the third rotating part 41 away from the fourth rotating part 43) is provided with a sliding sleeve 48. The sliding sleeve 48 is driven by a shift fork to move along the main shaft 2. When the sliding sleeve 48 moves axially, the rod spring 46 slides axially accordingly, causing the spline 47 to insert into or disengage from the spline hole 44. Thus, the rod spring 46 can be selectively connected to or not connected to the third rotating part 41 and the fourth rotating part 43.

[0041] The second working condition (when the rod spring 46 connects the third rotating part 41 and the fourth rotating part 43) is suitable for high-frequency forging.

[0042] Second embodiment (optional), see reference Figure 12 .

[0043] Based on the first embodiment, the present invention also installs a third buffer mechanism 5 between the "worm" and the "motor shaft that drives the worm to rotate". The third buffer mechanism 5 includes a continuously variable belt drive mechanism that connects the worm and the motor shaft.

[0044] The continuously variable belt drive mechanism adaptively changes the transmission ratio between the motor shaft and the worm when the speed of the worm changes, thus playing a buffering role.

[0045] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A buffer system for a radial forging chuck, characterized in that, The mechanism includes a helical spring buffer, which comprises a worm gear (1) mounted between the worm gear (1) driving the radial forging chuck and the spindle (2) connecting the radial forging chuck. A first rotating part (31) is sleeved on the outside of the main shaft (2) and is connected to the main shaft (2) for transmission. A second rotating part (33) is connected to one end of the worm gear (1). The first rotating part (31) is nested inside the second rotating part (33). An annular cavity is formed between the outer wall of the first rotating part (31) and the inner wall of the second rotating part (33). A plurality of first keys (32) extending radially outward from the outer wall of the first rotating part (31) and a plurality of second keys (34) extending radially inward from the inner wall of the second rotating part (33) divide the annular cavity into a plurality of arc-shaped spring chambers (35). Several helical springs (37) are respectively disposed inside the arc-shaped spring chamber (35). Each helical spring (37) has its two ends connected to a first key (32) and a second key (34), respectively. The two ends of the helical spring (37) are connected to the first key (32) and the second key (34) via a spherical joint connection. The first rotating part (31) and the second rotating part (33) can rotate relative to each other and can move relative to each other axially. The stretching or compression direction of the helical spring (37) is perpendicular to the […]. The radial line of the main shaft (2) forms an angle of not 90 degrees with the axis of the main shaft (2); hemispherical sliders are respectively installed at both ends of the helical spring (37), and hemispherical holes that cooperate with the hemispherical sliders are formed on the first key (32) and the second key (34), so that the helical spring (37) is buffered when compressed; or, spherical sliders are respectively installed at both ends of the helical spring (37), and spherical holes that cooperate with the spherical sliders are formed on the first key (32) and the second key (34), so that the helical spring (37) is buffered when stretched; It also includes a second buffer mechanism (4) installed between the worm gear (1) driving the radial forging chuck and the main shaft (2) connecting the radial forging chuck. The second buffer mechanism (4) includes a rod spring group buffer mechanism, which includes a plurality of rod springs (46) evenly distributed around the axis of the main shaft (2). Each rod spring (46) is used to generate a spring force perpendicular to the axis and radial line of the main shaft (2), so that when the main shaft (2) does not rotate but the worm gear (1) continues to rotate, it is compressed and stores kinetic energy as potential energy. The rod springs (46) are installed inside a cylindrical spring chamber (45) formed between the main shaft (2) and the worm gear (1). 5) is formed by a cylindrical gap between the end of the third rotating part (41) which is located on the outer wall of the main shaft (2) and is fixedly connected to the main shaft (2) and the end of the fourth rotating part (43) which is fixedly connected to the worm gear (1); the third rotating part (41) is a flat cylindrical shape, which is sleeved on the outside of the main shaft (2) and is an integral part of the main shaft (2); the fourth rotating part (43) is a flat cylindrical shape, which is axially connected to one end of the worm gear (1) and is an integral part of the worm gear (1); the rod spring (46) is a round rod shape parallel to the main shaft (2), and the two ends of the rod spring (46) are respectively connected to the third rotating part (41) and the fourth rotating part (43).

2. The buffer system for the radial forging chuck according to claim 1, characterized in that, Between the worm that drives the worm wheel (1) and the motor that drives the worm, a third buffer mechanism (5) is also installed. The third buffer mechanism (5) is a continuously variable belt drive mechanism. The continuously variable belt drive mechanism adaptively changes the transmission ratio between the motor shaft and the worm when the rotational speed of the worm changes, thereby playing a buffering role.

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