Coil spring set buffer mechanism and buffer system of radial forging chuck

Abstract

The invention relates to the technical field of radial forging forming, in particular to a spiral spring set buffering mechanism and system of a radial forging chuck. The spiral spring set buffering mechanism comprises a first rotating part connected with a main shaft and a second rotating part connected with a worm gear, and an annular cavity is formed between the first rotating part and the second rotating part; a plurality of first keys extending outwards in the radial direction from the outer wall of the first rotating part and a plurality of second keys extending inwards in the radial direction from the inner wall of the second rotating part divide the annular cavity into a plurality of arc-shaped spring chambers, and a spiral spring is arranged in each arc-shaped spring chamber. The two ends of each spiral spring are connected with the first key and the second key respectively. According to the embodiment of the invention, the buffer mechanism is directly arranged between the worm gear and the driven shaft, the impact energy in the rotating direction and / or the axial direction is directly absorbed and released through the spiral spring, the energy transmission path is short, the structure is more compact, and thus the stability and reliability of the system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radial forging forming, in particular to a spiral spring group buffer mechanism of a radial forging chuck.

[0002] The present application also relates to a buffer system of a radial forging chuck. BACKGROUND

[0003] Radial forging forming equipment (also known as precision forging machine) realizes high-frequency forging forming of a workpiece by four or more synchronous movement of hammer heads, the workpiece is clamped by a chuck and rotates around the axis of the chuck to realize high-frequency forging forming of the workpiece. When the equipment is forged by multiple hammer heads, the hammer head will produce a huge radial impact force in the moment of forging the workpiece, the impact force is transmitted to the chuck through the workpiece, which causes the rotation of the chuck and the workpiece to be temporarily hindered or even stopped. In order to protect the transmission system of the chuck and ensure the stability of the process, a buffer mechanism must be provided in the rotation driving system of the chuck.

[0004] The core principle of the prior art rotation buffer mechanism is that when the forging causes the chuck to stop rotating, the worm wheel on the chuck spindle stops rotating, the worm driven by the motor is still rotating, the worm wheel and the worm collide, the impact force is transmitted to the worm through the worm wheel, so that the worm is displaced along the axis direction, and then the elastic element arranged on the worm is compressed to absorb the impact energy.

[0005] This way of converting the impact force in the rotation direction into the axial displacement of the worm, and then buffering through the axial elastic element, will cause the service life of the worm wheel and worm to be reduced. The force transmission path is relatively indirect, and needs to pass through multiple mechanical components such as the chuck spindle, worm wheel, worm, and elastic element, and involves additional kinematic pairs.

[0006] This indirect energy conversion path may cause a certain lag in the response of the system, the service life of the worm wheel and worm is reduced, and a belt drive is needed between the motor and the worm for buffering and vibration absorption, thereby increasing the complexity of the structure.

[0007] Therefore, the prior art needs a buffer mechanism with a more direct force transmission path and pre-buffering to improve the service life and reliability of the chuck transmission system. SUMMARY

[0008] The purpose of the present application is to provide a spiral spring group buffer mechanism of a radial forging chuck, which places the spiral spring group on the worm wheel, and the impact is buffered by the spring between the chuck spindle and the worm wheel, eliminating the impact of the worm wheel and worm meshing, prolonging the service life of the chuck worm drive mechanism, and the drive mechanism structure is also compact. Compared with the disc spring group, the spiral spring group can provide a larger buffer amount and better vibration absorption capacity, and the service life of the spiral spring is higher than that of the disc spring group.

[0009] To solve the above technical problems, the present application specifically provides the following technical solutions: A spiral spring set buffer mechanism of a radial forging chuck, comprising a first rotating part sleeved on the outside of a main shaft and in transmission connection with the main shaft, a second rotating part connected to one end of a worm wheel, the first rotating part being nested in the interior of the second rotating part, a circular annular cavity being 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 separating the circular annular cavity into a plurality of arc-shaped spring chambers, a plurality of spiral springs, the spiral springs being respectively arranged in the interior of the arc-shaped spring chambers, and the two ends of each spiral spring being respectively connected with one first key and one second key. Further, the two ends of the spiral spring are connected with the first key and the second key in a fixed connection, cylindrical pair connection or spherical pair connection mode.

[0010] Further, the first rotating part and the second rotating part can relatively rotate and cannot relatively axially move; the two ends of the spiral spring are respectively provided with semicylindrical sliders, cylindrical grooves matched with the semicylindrical sliders being formed on the first keys and the second keys, and the spiral spring is buffered when compressed.

[0011] Further, the first rotating part and the second rotating part can relatively rotate and cannot relatively axially move; the two ends of the spiral spring are respectively provided with ferrules, cylindrical rods matched with the ferrules being formed on the first keys and the second keys, and the spiral spring is buffered when stretched.

[0012] Further, the first rotating part and the second rotating part can relatively rotate and can relatively axially move; the two ends of the spiral spring are respectively provided with semispherical sliders, semispherical holes matched with the semispherical sliders being formed on the first keys and the second keys, and the spiral spring is buffered when compressed.

[0013] Further, the first rotating part and the second rotating part can relatively rotate and can relatively axially move; the two ends of the spiral spring are respectively provided with spherical sliders, spherical holes matched with the spherical sliders being formed on the first keys and the second keys, and the spiral spring is buffered when stretched.

[0014] Further, the first rotating part and the second rotating part can relatively rotate and can relatively axially move; the two ends of the spiral spring are respectively provided with spherical sliders, spherical holes matched with the spherical sliders being formed on the first keys and the second keys, and the spiral spring is buffered when stretched.

[0015] ​A buffer system of a radial forging chuck comprises any one of the spiral spring group buffer mechanisms, and a third buffer mechanism is installed between a worm driving the worm wheel and a motor driving the worm.

[0016] The present application has the following advantages over the prior art: The buffer mechanism is directly arranged between the worm wheel and the main shaft in the embodiment of the present application, and the rotational direction and / or axial direction impact energy is directly absorbed and released by the plurality of spiral springs arranged in the circumferential direction, the energy transmission path is short, the structure is more compact, and thus the stability and reliability of the system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0018] Figure 1 A perspective view of one view of the first embodiment of the present application; Figure 2 A top view of the first embodiment of the present application; Figure 3 A sectional view of the A-A direction of Figure 2 Figure 4 An assembly view of the first embodiment of the present application; Figure 5 A perspective view of the second rotating part of the first embodiment of the present application; Figure 6 A perspective view of the first rotating part of the first embodiment of the present application; Figure 7 A perspective view of another view of the first embodiment of the present application; Figure 8 A perspective view of another working condition of the first embodiment of the present application; Figure 9 A sectional view of the B-B direction of Figure 2 Figure 10 A perspective view of the rod spring of the first embodiment of the present application; Figure 11 A perspective view of the fourth rotating part of the first embodiment of the present application; Figure 12 A perspective view of the second embodiment of the present application; ​​The reference signs in the figures respectively represent the following: 1 - worm gear; 2 - main shaft; 3 - first buffering mechanism; 31 - first rotating part; 32 - first key; 33 - second rotating part; 34 - second key; 35 - arc spring chamber; 36 - cylindrical groove; 37 - helical spring; 38 - semi-cylindrical slider; 4 - second buffering 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 buffering mechanism. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] In the first embodiment, with reference to Figures 1 to 11 .

[0021] With reference to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 , the present application installs a first buffering mechanism 3 between the "worm gear 1" and the "main shaft 2 connected with the clamping jaw or chuck", and the first buffering mechanism 3 comprises: The helical spring 37 group buffering mechanism comprises a plurality of helical springs 37 uniformly distributed around the axis of the main shaft 2, and each helical spring 37 is used to generate a "perpendicular to the axis of the main shaft 2 and radial line" elastic force, which is used to accumulate kinetic energy into potential energy when compressed or stretched when the main shaft 2 does not rotate and the worm gear 1 continues to rotate.

[0022] Among them, the helical spring 37 is installed inside an arc spring chamber 35 formed between the main shaft 2 and the worm gear 1, and the arc spring chamber 35 is composed of an "arc-shaped gap" between the "outer ring of the first rotating part 31 fixedly connected with the main shaft 2" and the "inner ring of the second rotating part 33 fixedly connected with 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 with the main shaft 2 through a flat key transmission.

[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 in the second rotating part 33, and a circular annular cavity is formed between the outer wall of the first rotating part 31 and the inner wall of the second rotating part 33, which is divided into several arc-shaped cavities by the first key 32 extending radially outward from the outer wall of the first rotating part 31 and the second key 34 extending radially inward from the inner wall of the second rotating part 33, and each arc-shaped cavity is an arc-shaped spring chamber 35.

[0026] The arc-shaped spring chamber 35 is closed, so as to ensure that the coil spring 37 cannot fall out of the arc-shaped spring chamber 35.

[0027] The coil spring 37 is embedded in the arc-shaped spring chamber 35, and the two ends of the coil spring 37 are connected with the first key 32 and the second key 34, and the connection mode of the coil spring 37 with the first key 32 and the second key 34 can be: I. fixed connection (not shown in the figure): connected by bolts or welding; II. connected by a cylindrical pair (refer to Figure 3 ): the two ends of the coil spring 37 are respectively provided with a semicylindrical slider 38, the axis of the cylindrical surface of the slider is perpendicular to the compression direction of the coil spring 37, and the cylindrical surface of the slider is matched with the cylindrical groove 36 formed on the first key 32 and the second key 34, and the spring accumulates potential energy when compressed.

[0028] III. connected by another cylindrical pair (not shown in the figure): the two ends of the coil spring 37 are respectively provided with a sleeve ring, the axis of the sleeve ring is perpendicular to the stretching direction of the coil spring 37, and the inner hole of the sleeve ring is matched with the cylindrical rod formed on the first key 32 and the second key 34, and the spring accumulates potential energy when stretched.

[0029] IV. connected by a spherical pair (not shown in the figure): the two ends of the coil spring 37 are respectively provided with a hemispherical slider, the spherical surface of the slider is matched with the hemispherical hole formed on the first key 32 and the second key 34, and the spring accumulates potential energy when compressed.

[0030] V. connected by another spherical pair (not shown in the figure): the two ends of the coil spring 37 are respectively provided with a spherical slider, the spherical surface of the slider is matched with the spherical hole formed on the first key 32 and the second key 34, and the spring accumulates potential energy when stretched.

[0031] Among them, the connection modes I, II and III enable the coil spring 37 to serve as a rotary motion buffering mechanism, in which the first rotating part 31 and the second rotating part 33 can only rotate relative to each other and cannot move axially relative to each other, and the stretching or compression direction of the spring is strictly perpendicular to the axis of the main shaft 2 and the radial line.

[0032] The connection modes four and five make the helical spring 37 not only serve as a rotation motion buffering mechanism, but also serve as an axial motion buffering mechanism. In the connection structure, the first rotating part 31 and the second rotating part 33 can not only rotate relative to each other, but also move axially relative to each other. The stretching or compression direction of the spring is strictly perpendicular to the radial line of the main shaft 2, and forms an angle with the axis of the main shaft 2, which is not 90 degrees.

[0033] The first working condition (the rod spring 46 or 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] The second working condition, referring to Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 .

[0035] On the basis of the foregoing embodiment, the application further installs a second buffering mechanism 4 between the "worm wheel 1" and the "main shaft 2 connected with the clamping jaw or chuck", and the second buffering mechanism 4 comprises: The rod spring 46 group buffering mechanism comprises a plurality of rod springs 46 uniformly distributed around the axis of the main shaft 2, and each rod spring 46 is used to generate a "perpendicular to the axis and radial line of the main shaft 2" elastic force, so as to be compressed and accumulate kinetic energy into potential energy when the main shaft 2 does not rotate and the worm wheel 1 continues to rotate.

[0036] Among them, the rod spring 46 is installed inside a cylindrical spring chamber 45 formed between the main shaft 2 and the worm wheel 1. The cylindrical spring chamber 45 is composed of a "cylindrical gap" formed between the "outer wall of the main shaft 2" and the "end of the third rotating part 41 fixedly connected to the main shaft 2" and the "end of the fourth rotating part 43 fixedly connected to the worm wheel 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 with 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 wheel 1 and is an integral part with the worm wheel 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 arranged inside the "cylindrical spring chamber 45". The rod spring 46 is a circular rod shape parallel to the main shaft 2. The two ends of the rod spring 46 are respectively connected to the third rotating part 41 and the fourth rotating part 43. The connection mode of the rod spring 46 with the third rotating part 41 and the fourth rotating part 43 can be: I. Fixed connection: through bolt connection or welding; II. Removable connection: the rod spring 46 is slidingly connected with the third rotating part 41, the third rotating part 41 is provided with a guide hole 42, the guide hole 42 is slidingly matched with the rod spring 46, and the rod spring 46 is allowed to slide parallel to the main shaft 2; and the rod spring 46 is inserted with 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 yoke to move along the main shaft 2, when the sliding sleeve 48 moves axially, the rod spring 46 slides axially, so that the spline 47 is inserted into or separated from the spline hole 44, and then the rod spring 46 is selectively connected or disconnected with 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), reference Figure 12 .

[0043] On the basis of the first embodiment, the application further installs a third buffering mechanism 5 between the worm and the motor shaft driving the worm to rotate, and the third buffering mechanism 5 comprises: a stepless speed change belt transmission mechanism connecting the worm and the motor shaft.

[0044] The stepless speed change belt transmission mechanism adaptively changes the transmission ratio of the motor shaft and the worm when the rotation speed of the worm changes, thereby playing a buffering role.

[0045] The above embodiments are only exemplary embodiments of the application and are not used to limit the application, and the protection scope of the application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the application within the spirit and protection scope of the application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the embodiments of the application.

Claims

1. A radial forged collet with a helical spring assembly buffer mechanism, characterized in that, Includes a worm gear (1) mounted between the worm gear (1) that drives the radial forging chuck and the spindle (2) that connects 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), and each helical spring (37) is connected at both ends to a first key (32) and a second key (34).

2. The helical spring buffer mechanism of the radial forging chuck according to claim 1, characterized in that, The two ends of the helical spring (37) are connected to the first key (32) and the second key (34) by means of fixed connection, cylindrical pair connection or spherical pair connection.

3. The helical spring buffer mechanism of the radial forging chuck according to claim 2, characterized in that, The first rotating part (31) and the second rotating part (33) can rotate relative to each other but cannot move relative to each other axially; the two ends of the helical spring (37) are respectively equipped with semi-cylindrical sliders (38), and the first key (32) and the second key (34) are formed with cylindrical grooves (36) that cooperate with the semi-cylindrical sliders (38), and the helical spring (37) is buffered when compressed.

4. The helical spring buffer mechanism of the radial forging chuck according to claim 2, characterized in that, The first rotating part (31) and the second rotating part (33) can rotate relative to each other but cannot move relative to each other axially; the two ends of the helical spring (37) are respectively formed with collars, and the first key (32) and the second key (34) are formed with cylindrical rods that cooperate with the collars, and the helical spring (37) is buffered when stretched.

5. The helical spring buffer mechanism of the radial forging chuck according to claim 2, characterized in that, 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; 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), and the helical spring (37) is buffered when compressed.

6. The helical spring buffer mechanism of the radial forging chuck according to claim 2, characterized in that, 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; spherical sliders are respectively installed at both ends of the helical spring (37), and ball holes that cooperate with the spherical sliders are formed on the first key (32) and the second key (34), and the helical spring (37) is buffered when stretched.

7. A buffer system for a radial forging chuck, characterized in that, The helical spring assembly buffer mechanism comprising any one of claims 1-6 is 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.

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