A tool loosening force unloading device and machining center

Abstract

The present invention relates to a tool loosening force unloading device and a machining center, wherein the tool loosening force unloading device comprises a sleeve, a motor, a shaft core, a pull rod, a disc spring assembly, a sleeve connected to the rear end of the sleeve, a rear bearing seat connected to the inner wall of the sleeve, a bearing arranged in the rear bearing seat and sleeved on the shaft core, a first cylinder connected to an end of the sleeve away from the sleeve, and a second cylinder connected to an end of the first cylinder away from the sleeve; the second cylinder is provided with a second piston, and the second piston can push the pull rod to move in a direction away from the second cylinder to perform a tool loosening action; the first cylinder is provided with a first piston, and the first piston can push the shaft core in a direction close to the second cylinder. The unloading force provided by the first cylinder can prevent the tool loosening force from acting on the bearing, avoid damage or potential damage to the bearing, and increase the service life of the bearing.

Description

Technical Field

[0001] The invention relates to the technical field of machining centers, and in particular to a tool loosening force unloading device and a machining center. Background Art

[0002] Nowadays, machining centers all have broaching system mechanisms to clamp and loosen the tool, and then cut metal. However, when loosening the tool, the pressure generated by the drawbar squeezing the disc spring is very high, and is basically borne entirely by the spindle bearings. In addition, the loosening action is very frequent in machining, and the shaft core generates a large axial force, which will reduce the service life of the bearings. For example, the loosening force of HSKA63 reaches 23.45KN, and in the loosening state, it is all applied to the shaft core, and the shaft core finally acts on the bearing, which will damage the bearing and reduce the life of the bearing.

[0003] Therefore, it is necessary to provide a tool release force unloading device and a machining center to solve the deficiencies of the prior art. Summary of the invention

[0004] In order to solve the problems in the prior art, the present invention provides a tool loosening force unloading device and a machining center.

[0005] A tool loosening force unloading device, comprising a sleeve, a motor arranged in the sleeve, a shaft core penetrating the motor and rotatable with the motor, a pull rod penetrating the shaft core, a disc spring group arranged between the pull rod and the shaft core, a sleeve connected to the rear end of the sleeve, a rear bearing seat connected to the inner wall of the sleeve, a bearing arranged in the rear bearing seat and sleeved on the shaft core, a first cylinder connected to one end of the sleeve away from the sleeve, and a second cylinder connected to one end of the first cylinder away from the sleeve;

[0006] The second cylinder is provided with a second piston, and the second piston can push the pull rod to move in a direction away from the second cylinder to loosen the knife;

[0007] The first cylinder is provided with a first piston, and the first piston can push the shaft core toward the direction approaching the second cylinder.

[0008] Furthermore, a baffle is coaxially connected to one end of the shaft core close to the second cylinder, the inner diameter of the baffle is smaller than the inner diameter of the shaft core, and the outer diameter of the baffle is larger than the outer diameter of the shaft core;

[0009] When the first piston moves toward the direction approaching the second cylinder, it can abut against the baffle and push the baffle to move.

[0010] Furthermore, the second cylinder is provided with a second cylinder body, and an elastic member is provided between the first piston and the second cylinder body;

[0011] When the first piston abuts against the baffle, the elastic member is in a compressed state.

[0012] Furthermore, a proximity switch signal ring is sleeved on one end of the pull rod close to the second cylinder;

[0013] When the second piston moves in a direction close to the shaft core, it can abut against the proximity switch signal ring and push it to move.

[0014] Furthermore, a distance sensor is provided in the first piston, and the distance sensor is used to sense the distance between the piston and the baffle.

[0015] Furthermore, a first annular protrusion extending inward is provided at one end of the shaft core away from the second cylinder, and the pull rod is tightly connected to the first annular protrusion;

[0016] A second annular protrusion extending outward is provided at one end of the pull rod close to the second cylinder, and the shaft core is tightly connected to the second annular protrusion;

[0017] The disc spring assembly is arranged between the first annular protrusion and the second annular protrusion.

[0018] Furthermore, the first cylinder is provided with a first cylinder body, the first cylinder body is provided with a first oil inlet passage, the outer side of the first oil inlet passage is connected with the oil source through a first joint, and the inner side of the first oil inlet passage is connected with the first piston;

[0019] When oil enters the first oil inlet passage, the first piston can be pushed to move toward the second cylinder.

[0020] Further, the second cylinder body is provided with a second oil inlet passage and a third oil inlet passage; the outer side of the second oil inlet passage is connected to the oil source through a second joint, and the inner side of the second oil inlet passage is connected to the end of the piston away from the shaft core; the outer side of the third oil inlet passage is connected to the oil source through a third joint, and the inner side of the third oil inlet passage is connected to the end of the piston close to the shaft core;

[0021] When oil is introduced into the second oil inlet passage, the piston may be pushed toward the direction approaching the shaft core, and when oil is introduced into the third oil inlet passage, the piston may be pushed toward the direction away from the shaft core.

[0022] Furthermore, a first sealing ring is provided between the first piston and the first cylinder body; and a second sealing ring is provided between the second piston and the second cylinder body.

[0023] Furthermore, a motor sleeve is provided between the shaft sleeve and the motor, one end of the motor sleeve is bent and connected to the rear end of the shaft sleeve, and the sleeve is connected to the motor sleeve.

[0024] Based on the same inventive concept, the present invention also provides a machining center, including the tool loosening force unloading device.

[0025] The technical solution of the present invention has the following advantages compared with the closest prior art:

[0026] The technical solution provided by the present invention provides a knife loosening force unloading device, which is configured by setting a first cylinder in the opposite direction to the pushing direction of the second cylinder. When the knife is loosened, the second cylinder pushes the pull rod to move in the direction away from the second cylinder, and the pull rod applies axial force to the disc spring group and the shaft core in turn when moving, and the force further acts on the bearing sleeved on the shaft core; while loosening the knife, the first cylinder simultaneously applies a force in the direction of the second cylinder to the shaft core, that is, a force in the opposite direction to the force of the disc spring acting on the shaft core, so this force in the opposite direction can unload the knife loosening force, and is further transmitted to the parent equipment used to install the knife loosening force unloading device; the unloading force provided by the first cylinder can prevent the knife loosening force from acting on the bearing, thereby avoiding damage or potential damage to the bearing and increasing the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural cross-sectional view of the knife loosening force unloading device provided by the present invention;

[0028] Figure 2 yes Figure 1 A partial enlarged view of the right half of the image.

[0029] Among them, 1-shaft core, 2-disc spring group, 3-first oil inlet channel, 4-first sealing ring, 5-first piston, 6-elastic member, 7-baffle, 8-proximity switch signal ring, 9-pull rod, 10-second piston, 11-distance sensor, 12-bearing, 13-motor, 14-motor sleeve, 15-shaft sleeve, 16-sleeve. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] In the present application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0033] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0034] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figure 1-2 The present application is described in detail with reference to embodiments. Figure 1 It is a structural cross-sectional view of the tool loosening force unloading device provided by the present invention, in which the upper half shows the tool loosening state and the lower half shows the tool pulling state; Figure 2 yes Figure 1 A partial enlarged view of the right half of the image.

[0036] The present invention provides a tool loosening force unloading device, comprising a sleeve 15, a motor 13 arranged in the sleeve 15, a shaft core 1 that passes through the motor 13 and can rotate with the motor 13, a pull rod 9 that passes through the shaft core 1, a disc spring group 2 arranged between the pull rod 9 and the shaft core 1, a sleeve 16 connected to the rear end of the sleeve 15, a rear bearing seat connected to the inner wall of the sleeve 16, a bearing 12 arranged in the rear bearing seat and sleeved on the shaft core 1, a first cylinder connected to an end of the sleeve 16 away from the sleeve 15, and a second cylinder connected to an end of the first cylinder away from the sleeve 16; the second cylinder is provided with a second piston 10, and the second piston 10 can push the pull rod 9 to move in a direction away from the second cylinder to perform a tool loosening action; the first cylinder is provided with a first piston 5, and the first piston 5 can push the shaft core 1 in a direction close to the second cylinder.

[0037] The sleeve 16 is an annular sealing member, one axial end of which is connected to the shaft sleeve 15, the other axial end of which is connected to the first cylinder, and the inner wall of which is connected to the bearing seat.

[0038] By setting the first cylinder in the opposite direction to the pushing direction of the second cylinder, when loosening the tool, the second cylinder pushes the pull rod 9 to move in the direction away from the second cylinder, and the pull rod 9 applies axial force to the disc spring group 2 and the shaft core 1 in turn when moving, and the force further acts on the bearing 12 sleeved on the shaft core 1; when loosening the tool, the first cylinder simultaneously applies a force in the direction of the second cylinder to the shaft core 1, that is, a force in the opposite direction to the force of the disc spring acting on the shaft core 1, so this force in the opposite direction can unload the tool loosening force, and further transmit it to the parent equipment for installing the tool loosening force unloading device, the parent equipment can generally be a spindle box, and then further a machine tool; the unloading force provided by the first cylinder can prevent the tool loosening force from acting on the bearing 12, avoid damage or potential damage to the bearing 12, and increase the service life of the bearing 12.

[0039] In some embodiments of the present invention, a baffle 7 is coaxially connected to one end of the shaft core 1 close to the second cylinder, the inner diameter of the baffle 7 is smaller than the inner diameter of the shaft core 1, and the outer diameter of the baffle 7 is larger than the outer diameter of the shaft core 1; when the first piston 5 moves in the direction close to the second cylinder, it can resist the baffle 7 and push it to move. The baffle 7 can facilitate other components to provide forces in various directions to the shaft core 1, so its outer edge is outside the outer edge of the shaft core 1, and its inner edge is inside the inner edge of the shaft core 1. The first piston 5 is arranged on the side of the baffle 7 away from the second cylinder, and when it moves, it can resist the outer edge of the baffle 7 and further apply a force in the opposite direction of the knife loosening force to it. The force in the opposite direction of the knife loosening force is further applied to the shaft core 1, unloading the knife loosening force applied to the shaft core 1, thereby avoiding damage or potential damage to the bearing 12.

[0040] In some embodiments of the present invention, the second cylinder is provided with a second cylinder body, and an elastic member 6 is provided between the first piston 5 and the second cylinder body; when the first piston 5 abuts against the baffle 7, the elastic member 6 is in a compressed state. When the first piston 5 moves toward the second cylinder, it will gradually approach the second cylinder body. The elastic member 6 can be a spring. The elastic member 6 can prevent the first piston 5 from having a rigid collision with the second cylinder body, that is, the movement of the first piston 5 is slow and uniform, and after the first piston 5 loses the forward power or the pressure-maintaining power, the elastic member 6 can push the first piston 5 to move away from the second cylinder body during the process of restoring the natural state, that is, it can release the abutment and release from the baffle 7. This is mainly to facilitate the rotation of the shaft core 1 when the tool is broached, and avoid the friction between the shaft core 1 and the first piston 5 when the tool is rotated, so that it can rotate normally and broach normally.

[0041] In some embodiments of the present invention, a proximity switch signal ring 8 is sleeved on one end of the pull rod 9 close to the second cylinder; when the second piston 10 moves in the direction close to the shaft core 1, it can abut against the proximity switch signal ring 8 and push it to move. The position change of the proximity switch signal ring 8 is synchronized with the position change of the pull rod 9, so the position information of the pull rod 9 can be monitored through the position monitoring of the proximity switch signal ring 8. When the tool is released, when the pull rod 9 is pushed to the appropriate position, it is necessary to stop pushing, and the monitoring function of the proximity switch signal ring 8 can cooperate with the hydraulic system, so that the hydraulic system performs pressure maintenance when the pull rod 9 moves to the appropriate position to prevent the pull rod 9 from being pushed inadequately or over-positioned.

[0042] In some embodiments of the present invention, a distance sensor 11 is provided in the first piston 5, and the distance sensor 11 is used to sense the distance between the piston and the baffle 7. When the first piston 5 loses the power of movement and the power of pressure maintenance, the elastic member 6 can release the contact between the first piston 5 and the baffle 7 by extending. The distance sensor 11 can be embedded in the first piston 5 from one end of the first piston 5 toward the baffle 7, so as to facilitate monitoring whether the first piston 5 is separated from the baffle 7. After the control center obtains the information of the confirmed separation from the distance sensor 11, it starts to drive the shaft core 1 to rotate through the motor 13, and then performs broaching.

[0043] In some embodiments of the present invention, the end of the shaft core 1 away from the second cylinder is provided with a first annular protrusion extending inward, and the pull rod 9 is tightly connected to the first annular protrusion; the end of the pull rod 9 close to the second cylinder is provided with a second annular protrusion extending outward, and the shaft core 1 is tightly connected to the second annular protrusion; the disc spring group 2 is provided between the first annular protrusion and the second annular protrusion. The disc spring group 2 can transmit the axial force of the pull rod 9 to the shaft core 1.

[0044] In some embodiments of the present invention, the first cylinder is provided with a first cylinder body, the first cylinder body is provided with a first oil inlet channel 3, the outer side of the first oil inlet channel 3 is connected to the oil source through a first joint, and the inner side of the first oil inlet channel 3 is connected to the first piston 5; when oil enters the first oil inlet channel 3, the first piston 5 can be pushed to move in a direction close to the second cylinder. The first oil inlet channel 3 can push the first piston 5 to move when oil enters, and the speed and flow of the oil entering can adjust the size of the unloading force applied by the first piston 5 to the shaft core 1. The first oil inlet channel 3 can be connected to the oil source of the hydraulic system through an L-shaped hydraulic iron joint, and the hydraulic system can also apply pressure holding treatment to the first cylinder.

[0045] In some embodiments of the present invention, the second cylinder body is provided with a second oil inlet channel and a third oil inlet channel; the outer side of the second oil inlet channel is connected to the oil source via a second joint, and the inner side of the second oil inlet channel is connected to the end of the piston away from the shaft core 1; the outer side of the third oil inlet channel is connected to the oil source via a third joint, and the inner side of the third oil inlet channel is connected to the end of the piston close to the shaft core 1; when the second oil inlet channel is filled with oil, the piston can be pushed in a direction close to the shaft core 1, and when the third oil inlet channel is filled with oil, the piston can be pushed in a direction away from the shaft core 1. When loosening the tool, the oil flowing into the second oil inlet channel can push the second piston 10 forward, the speed and flow of the oil flowing can adjust the force applied by the second piston 10 to the pull rod 9, and the second oil inlet channel can be connected to the oil source of the hydraulic system through an L-shaped hydraulic iron joint, and the hydraulic system can also apply a pressure-maintaining treatment to the second cylinder; when pulling the tool, the oil flowing into the third oil inlet channel can push the second piston 10 backward, the speed and flow of the oil flowing can adjust the speed at which the second piston 10 retreats, and the third oil inlet channel can be connected to the oil source of the hydraulic system through a straight-through quick-change joint, and the hydraulic system can also apply a pressure-maintaining treatment to the second cylinder.

[0046] In some embodiments of the present invention, a first sealing ring 4 is provided between the first piston 5 and the first cylinder body; a second sealing ring is provided between the second piston 10 and the second cylinder body. The first sealing ring 4 can ensure the air tightness of the connection between the first piston 5 and the first cylinder body, thereby ensuring the effectiveness and response speed of the push of the first piston 5 when the first oil inlet channel 3 is filled with oil, and the second sealing ring can ensure the air tightness of the connection between the second piston 10 and the second cylinder body, thereby ensuring the effectiveness and response speed of the forward or backward push of the second piston 10 when the second oil inlet channel or the third oil inlet channel is filled with oil.

[0047] In some embodiments of the present invention, a motor sleeve 14 is provided between the shaft sleeve 15 and the motor 13, one end of the motor sleeve 14 is bent and connected to the rear end of the shaft sleeve 15, and the sleeve is connected to the motor sleeve 14. The motor sleeve 14 can improve the connection stability between the motor 13 and the shaft sleeve 15, and improve the connection stability between the shaft sleeve 15 and the sleeve 16.

[0048] Based on the same inventive concept, the present invention also provides a machining center, including the tool loosening force unloading device.

[0049] It should be noted that, in this document, relational terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A knife loosening force unloading device, characterized in that: The invention comprises a shaft sleeve (15), a motor (13) arranged in the shaft sleeve (15), a shaft core (1) passing through the motor (13) and being rotatable with the motor (13), a pull rod (9) passing through the shaft core (1), a disc spring assembly (2) arranged between the pull rod (9) and the shaft core (1), a sleeve (16) connected to the rear end of the shaft sleeve (15), a rear bearing seat connected to the inner wall of the sleeve (16), a bearing (12) arranged in the rear bearing seat and sleeved on the shaft core (1), a first cylinder connected to an end of the sleeve (16) away from the shaft sleeve (15), and a second cylinder connected to an end of the first cylinder away from the sleeve (16); The second cylinder is provided with a second piston (10), and the second piston (10) can push the pull rod (9) to move in a direction away from the second cylinder to perform a knife loosening action; The first cylinder is provided with a first piston (5), and the first piston (5) can push the shaft core (1) in a direction close to the second cylinder; A baffle (7) is coaxially connected to one end of the shaft core (1) close to the second cylinder, the inner diameter of the baffle (7) is smaller than the inner diameter of the shaft core (1), and the outer diameter of the baffle (7) is larger than the outer diameter of the shaft core (1); When the first piston (5) moves in a direction close to the second cylinder, it can abut against the baffle (7) and push it to move; The second cylinder is provided with a second cylinder body, and an elastic member (6) is provided between the first piston (5) and the second cylinder body; When the first piston (5) abuts against the baffle (7), the elastic member (6) is in a compressed state.

2. The knife loosening force unloading device according to claim 1 is characterized in that: A proximity switch signal ring (8) is sleeved on one end of the pull rod (9) close to the second cylinder; When the second piston (10) moves in a direction approaching the shaft core (1), it can abut against the proximity switch signal ring (8) and push it to move.

3. The knife loosening force unloading device according to claim 1, characterized in that: A distance sensor (11) is provided inside the first piston (5), and the distance sensor (11) is used to sense the distance between the first piston (5) and the baffle (7).

4. The knife loosening force unloading device according to claim 1, characterized in that: An end of the shaft core (1) away from the second cylinder is provided with a first annular protrusion extending inwardly, and the pull rod (9) is tightly connected to the first annular protrusion; A second annular protrusion extending outward is provided at one end of the pull rod (9) close to the second cylinder, and the shaft core (1) is tightly connected to the second annular protrusion; The disc spring assembly (2) is arranged between the first annular protrusion and the second annular protrusion.

5. The knife loosening force unloading device according to claim 1, characterized in that: The first cylinder is provided with a first cylinder body, the first cylinder body is provided with a first oil inlet passage (3), the outer side of the first oil inlet passage (3) is connected to an oil source via a first joint, and the inner side of the first oil inlet passage (3) is connected to a first piston (5); When oil flows into the first oil inlet passage (3), the first piston (5) can be pushed to move in a direction close to the second cylinder.

6. The knife loosening force unloading device according to claim 5, characterized in that: The second cylinder body is provided with a second oil inlet passage and a third oil inlet passage; the outer side of the second oil inlet passage is connected to the oil source via a second joint, and the inner side of the second oil inlet passage is connected to an end of the second piston (10) away from the shaft core (1); the outer side of the third oil inlet passage is connected to the oil source via a third joint, and the inner side of the third oil inlet passage is connected to an end of the second piston (10) close to the shaft core (1); When oil is introduced into the second oil inlet passage, the second piston (10) can be pushed in a direction close to the shaft core (1); and when oil is introduced into the third oil inlet passage, the second piston (10) can be pushed in a direction away from the shaft core (1).

7. The knife loosening force unloading device according to claim 6, characterized in that: A first sealing ring (4) is provided between the first piston (5) and the first cylinder body; and a second sealing ring is provided between the second piston (10) and the second cylinder body.

8. The knife loosening force unloading device according to claim 1, characterized in that: A motor sleeve (14) is provided between the shaft sleeve (15) and the motor (13); one end of the motor sleeve (14) is bent and connected to the rear end of the shaft sleeve (15); and the sleeve (16) is connected to the motor sleeve (14).

9. A machining center, characterized in that: It comprises the knife loosening force unloading device as described in any one of claims 1 to 8.

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