Tensioning mechanism for automatically adjusting chain type tool magazine

Abstract

The invention discloses a tensioning mechanism for automatically adjusting a chain type tool magazine. Comprising a base, an arc-shaped plate is fixedly connected to one end of the base, a chain wheel is arranged at the other end of the base, a diffuse reflection sensor is arranged on the arc-shaped plate, and rails are arranged on the side faces of the base and the arc-shaped plate. And the spring pushes the flange to move towards the lower part of the chain wheel, so that the tensioning of the whole chain link plate group is adjusted. And after the adjustment is completed, the spring tensioning screw is locked by using a nut. Tensioning can be automatically adjusted, and tool magazine chain plate loosening caused by abrasion can be completely eradicated before a spring loses efficacy. And the problem that the tool magazine chain plate is abraded quickly due to too large tensioning force is effectively solved. During transmission, vibration of the tool magazine is reduced, force transmitted to the chain plate during tool changing is effectively buffered, and the problem that the tensioning force of the chain plate is too large due to tool changing force is solved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tools, in particular to a tensioning mechanism for automatically adjusting a chain tool magazine. Background Art

[0002] Chain tool magazine is a commonly used tool magazine in CNC machine tools, especially in large-scale machining equipment. It has a large tool capacity and can store more tools, thereby reducing the frequency and time of tool changes and improving processing efficiency.

[0003] The tools of the chain tool magazine are usually placed on a closed chain. The movement of the chain is driven by a servo motor, and the tool is sent to the spindle taper hole position through the transmission device. During the tool selection process, the control system will select the corresponding tool according to the needs and control the chain movement to send the tool to the spindle taper hole position. At the same time, the tool reversing device will send the used tool back to the chain tool magazine for next use.

[0004] The advantages of chain tool magazines are that they have large tool capacity, fast tool selection speed, and can meet the needs of large-scale mechanical processing equipment. However, chain tool magazines also have some disadvantages. The existing chain tool magazine chain plate can only be replaced or the tension of the chain plate can be readjusted after a slight wear, which makes the operation cost of the machining center higher. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides an automatically adjustable tensioning mechanism for a chain tool magazine, which has the advantages of being able to automatically adjust the tension and preventing the tool magazine chain plate from loosening due to wear before the spring fails.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: a tensioning mechanism for automatically adjusting a chain tool magazine, comprising a base, one end of the base is fixedly connected to an arc plate, the other end of the base is provided with a sprocket, a diffuse reflection sensor is provided on the arc plate, the base and the side surface of the arc plate are both provided with tracks, a knife claw is provided in the track, and a tool is provided in the knife claw;

[0009] A motor is arranged below the sprocket, a reducer is arranged between the motor and the sprocket, a flange is arranged on one side of the reducer, a pressure plate is arranged at the bottom of the flange, a spring is fixedly connected to one end of the flange, a spring tensioning block is fixedly connected to the end of the spring, a fixing block is arranged on the outer side of the spring tensioning block, a spring mounting screw is inserted in the spring, and a spring tensioning screw is threadedly connected to the fixing block.

[0010] Preferably, the base adopts a rectangular structure, and the diameter of the arc plate is the same as the length of the short side of the base.

[0011] Preferably, the arc-shaped plate is fixedly connected to the end of the base by bolts, and one end of the base provided with a sprocket is provided with a rotation groove.

[0012] The above technical solution is adopted: the base provides support and installation platform for other structures, and the arc plate set at one end cooperates with the base to provide an installation platform for the track, so that the end of the track forms an arc structure, which is convenient for the knife claw to circulate on the track. The diameter of the arc plate is the same as the length of the short side of the base, so that the track can be perfectly connected between the two, ensuring the smoothness of the tool magazine when rotating. A rotating groove is opened at the other end of the base to provide a rotating space for the sprocket, so that the sprocket can drive the knife claw to circulate in the track.

[0013] Preferably, the sprocket is provided with an engagement groove, and the track comprises a vertical track groove and a horizontal track groove.

[0014] Preferably, there are a plurality of the knife claws which are evenly arranged in the track, and the plurality of the knife claws are connected together by a chain link group.

[0015] The above technical solution is adopted: the base and other parts form a track like a circular runway, so that the chain link group rotates forward or reversely inside the circular track. In addition, the annular groove is divided into a vertical track groove and a horizontal track groove, which respectively limit the position of the chain link group in the up and down direction and the left and right position in the horizontal plane, and then the spring at the sprocket applies force to the flange of the sprocket group to tighten the entire chain link group.

[0016] Preferably, the motor is a servo motor, and the reducer is a planetary reducer.

[0017] Preferably, a slot is provided at one end of the flange, and the spring mounting screw is threadedly connected in the slot.

[0018] Preferably, the spring tensioning block is sleeved on the spring mounting screw, and the fixing block is fixedly connected to the base.

[0019] The above technical solution is adopted: the motor drives the sprocket to rotate through the reducer. The reducer adopts a precision planetary reducer, which can reduce the speed of the motor and increase the output torque. The flange is used to fix the parts and make the sprocket set slide back and forth in the track to reduce the influence of the multiple deformation effect when the sprocket chain is driven. The position of the spring tensioning block is adjusted by loosening or tightening the spring tensioning screw, thereby compressing the spring, and then the spring pushes the flange to move under the sprocket, so that the tension of the entire chain plate group can be adjusted. After the adjustment is completed, the spring tensioning screw is locked with a nut.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a tensioning mechanism for automatically adjusting a chain tool magazine, which has the following beneficial effects:

[0022] The tensioning mechanism of the chain tool magazine automatically adjusts by setting structures such as flanges, springs, spring tensioning blocks, fixing blocks, spring mounting screws, and spring tensioning screws. The position of the spring tensioning block is adjusted by loosening or locking the spring tensioning screws, thereby compressing the spring, and then the spring pushes the flange to move below the sprocket, so that the tension of the entire chain link plate group can be adjusted. After the adjustment is completed, the spring tensioning screw is locked with a nut. The tension can be automatically adjusted, and the loosening of the tool magazine chain plate caused by wear can be prevented before the spring fails. The noise caused by excessive tensioning force can be effectively reduced, and the problem of rapid wear of the tool magazine chain plate caused by excessive tensioning force can be effectively reduced. During transmission, the vibration of the tool magazine is reduced, and the force transmitted to the chain plate during tool change is effectively buffered, solving the problem of excessive tensioning force on the chain plate caused by tool change force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a tensioning mechanism for automatically adjusting a chain tool magazine proposed by the present invention;

[0024] Figure 2 A schematic diagram of the structure of the sprocket position of the tensioning mechanism of the chain tool magazine with automatic adjustment proposed by the present invention;

[0025] Figure 3 A schematic cross-sectional structure diagram of the flange position of a tensioning mechanism for automatically adjusting a chain tool magazine proposed by the present invention from a first perspective;

[0026] Figure 4 A schematic cross-sectional structure diagram of the flange position of a tensioning mechanism for automatically adjusting a chain tool magazine proposed by the present invention from a second viewing angle;

[0027] Figure 5 The present invention provides a schematic structural diagram of the arc plate position of a tensioning mechanism for automatically adjusting a chain tool magazine.

[0028] In the figure: 1-base, 2-arc plate, 3-sprocket, 31-meshing groove, 4-diffuse reflection sensor, 5-track, 51-vertical track groove, 52-horizontal track groove, 6-claw, 7-tool, 8-motor, 9-reducer, 10-flange, 11-pressure plate, 12-spring, 13-spring tensioning block, 14-fixing block, 15-spring mounting screw, 16-spring tensioning screw. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-5 , a tensioning mechanism of a chain tool magazine with automatic adjustment, comprising a base 1, one end of the base 1 is fixedly connected with an arc plate 2, the other end of the base 1 is provided with a sprocket 3, a diffuse reflection sensor 4 is provided on the arc plate 2, the side surfaces of the base 1 and the arc plate 2 are provided with tracks 5, a knife claw 6 is provided in the track 5, and a knife claw 6 is provided in the knife claw 6. A tool 7 is provided;

[0031] A motor 8 is arranged below the sprocket 3, a reducer 9 is arranged between the motor 8 and the sprocket 3, a flange 10 is arranged on one side of the reducer 9, a pressure plate 11 is arranged at the bottom of the flange 10, a spring 12 is fixedly connected to one end of the flange 10, a spring tensioning block 13 is fixedly connected to the end of the spring 12, a fixing block 14 is arranged on the outer side of the spring tensioning block 13, a spring mounting screw 15 is inserted into the spring 12, and a spring tensioning screw 16 is threadedly connected to the fixing block 14.

[0032] Embodiment 1: The base 1 adopts a rectangular structure, and the diameter of the arc plate 2 is the same as the length of the short side of the base 1. The arc plate 2 is fixedly connected to the end of the base 1 by bolts, and a rotation groove is opened at one end of the base 1 where the sprocket 3 is provided. The base 1 provides a support and installation platform for other structures. The arc plate 2 set at one end cooperates with the base 1 to provide an installation platform for the track 5, so that the end of the track 5 forms an arc structure, which is convenient for the knife claw 6 to circulate on the track 5. The diameter of the arc plate 2 is the same as the length of the short side of the base 1, so that the track 5 can be perfectly connected in the middle of the two, ensuring the smoothness of the tool magazine when rotating. A rotation groove is opened at the other end of the base 1 to provide a rotation space for the sprocket 3, so that the sprocket 3 can drive the knife claw 6 to circulate in the track 5.

[0033] Embodiment 2: The sprocket 3 is provided with an engagement groove 31, and the track 5 includes a vertical track groove 51 and a horizontal track groove 52. There are a plurality of blade claws 6 which are evenly arranged in the track 5, and the plurality of blade claws 6 are connected together by a chain link group. The base 1 and other parts construct a track 5 like a circular runway, so that the chain link group rotates forward or reversely inside the circular track 5. In addition, the annular groove is divided into a vertical track groove 51 and a horizontal track groove 52, which respectively limit the position of the chain link group in the up-down direction and the left-right position in the horizontal plane, and then the spring at the sprocket 3 applies a force to the flange of the sprocket group to tension the entire chain link group.

[0034] Embodiment 3: The motor 8 adopts a servo motor, and the reducer 9 adopts a planetary reducer. A slot is provided at one end of the flange 10, and the spring mounting screw 15 is threadedly connected in the slot. The spring tensioning block 13 is sleeved on the spring mounting screw 15, and the fixing block 14 is fixedly connected to the base 1. The motor 8 drives the sprocket 3 to rotate through the reducer 9. The reducer 9 adopts a precise planetary reducer, which can reduce the speed of the motor and increase the output torque. The flange 10 is used to fix the parts and make the sprocket group slide back and forth in the track 5 to reduce the influence of the multiple deformation effect during the sprocket chain transmission. The position of the spring tensioning block 13 is adjusted by loosening or tightening the spring tensioning screw 16, thereby compressing the spring 12, and then the spring 12 pushes the flange 10 to move below the sprocket 3, so that the tension of the entire chain link plate group can be adjusted. After the adjustment is completed, the spring tensioning screw 16 is locked with a nut.

[0035] When in use, the motor 8 is started, and the motor 8 drives the sprocket 3 to rotate through the reducer 9, and the sprocket 3 drives the knife claw 6 to move cyclically in the track 5. The position of the spring tensioning block 13 is adjusted by loosening or locking the spring tensioning screw 16, thereby compressing the spring 12, and then the spring 12 pushes the flange 10 to move below the sprocket 3, so that the tension of the entire chain link plate group can be adjusted. After the adjustment is completed, the spring tensioning screw 16 is locked with a nut.

[0036] In summary, the tensioning mechanism of the chain tool magazine automatically adjusts by setting the flange 10, spring 12, spring tensioning block 13, fixing block 14, spring mounting screw 15, spring tensioning screw 16 and other structures, and adjusting the position of the spring tensioning block 13 by loosening or locking the spring tensioning screw 16, thereby compressing the spring 12, and then the spring 12 pushes the flange 10 to move below the sprocket 3, so that the tension of the entire chain link plate group can be adjusted. After the adjustment is completed, the spring tensioning screw 16 is locked with a nut. The tension can be automatically adjusted, and the loosening of the tool magazine chain plate caused by wear can be prevented before the spring 12 fails. The noise caused by excessive tensioning force is effectively reduced, and the problem of rapid wear of the tool magazine chain plate caused by excessive tensioning force is effectively reduced. During transmission, the vibration of the tool magazine is reduced, and the force transmitted to the chain plate during tool change is effectively buffered, solving the problem of excessive tensioning force on the chain plate caused by tool change force.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensioning mechanism for automatically adjusting a chain tool magazine, characterized in that: The invention comprises a base (1), one end of the base (1) is fixedly connected to an arc-shaped plate (2), the other end of the base (1) is provided with a sprocket (3), the arc-shaped plate (2) is provided with a diffuse reflection sensor (4), the side surfaces of the base (1) and the arc-shaped plate (2) are both provided with tracks (5), a knife claw (6) is provided in the track (5), and a knife claw (6) is provided in the knife claw (6); A motor (8) is arranged below the sprocket (3), a reducer (9) is arranged between the motor (8) and the sprocket (3), a flange (10) is arranged on one side of the reducer (9), a pressure plate (11) is arranged at the bottom of the flange (10), a spring (12) is fixedly connected to one end of the flange (10), a spring tensioning block (13) is fixedly connected to the end of the spring (12), a fixing block (14) is arranged on the outer side of the spring tensioning block (13), a spring mounting screw (15) is inserted into the spring (12), and a spring tensioning screw (16) is threadedly connected to the fixing block (14).

2. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 1 is characterized in that: The base (1) adopts a rectangular structure, and the diameter of the arc-shaped plate (2) is the same as the length of the short side of the base (1).

3. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 2 is characterized in that: The arc-shaped plate (2) is fixedly connected to the end of the base (1) by means of bolts, and one end of the base (1) provided with a sprocket (3) is provided with a rotation groove.

4. The tensioning mechanism for automatically adjusting the chain tool magazine according to claim 3 is characterized in that: The sprocket (3) is provided with an engagement groove (31), and the track (5) comprises a vertical track groove (51) and a horizontal track groove (52).

5. The tensioning mechanism for automatically adjusting the chain tool magazine according to claim 4 is characterized in that: There are a plurality of knife claws (6) which are evenly arranged in the track (5), and the plurality of knife claws (6) are connected together through a chain link group.

6. The tensioning mechanism for automatically adjusting the chain tool magazine according to claim 5, characterized in that: The motor (8) is a servo motor, and the reducer (9) is a planetary reducer.

7. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 6, characterized in that: A slot is formed at one end of the flange (10), and the spring mounting screw (15) is threadedly connected in the slot.

8. The tensioning mechanism of the chain tool magazine with automatic adjustment according to claim 7, characterized in that: The spring tensioning block (13) is sleeved on the spring mounting screw (15), and the fixing block (14) is fixedly connected to the base (1).

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