CN211681091U

CN211681091U - Improved structure of silent tool changing arm

Info

Publication number: CN211681091U
Application number: CN202020189582.3U
Authority: CN
Inventors: 李泳德
Original assignee: Te Shin Cam Co ltd
Current assignee: Te Shin Cam Co ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-10-16
Anticipated expiration: 2030-02-20

Abstract

An improved structure of silent tool changing arm comprises: a body with a rotation center and two arm parts, two pressing units and two top pin units, wherein the tail ends of the two arm parts are provided with a clasp part, the two pressing units comprise a first spring and a pressing cutter rod and are respectively arranged in the two arm parts, the cutter propping rod extends from the through holes of the two arm parts to one end of the cutter buckling part and is provided with a propping block, the first spring pushes the cutter propping rod continuously towards the direction of the rotating center, the two ejector pin units comprise second springs and ejector pin pieces and are respectively arranged at one ends of the two arm parts close to the rotating center, and the second springs push the ejector pin pieces continuously upwards, one side of the top pin piece opposite to the cutter resisting rod is provided with an inclined plane which inclines inwards from bottom to top, because the ejector pin piece is pressed downwards, the tool abutting rod can gradually move towards the direction of the rotation center, and the impact noise generated by the direct collision of the abutting block and the tool is avoided.

Description

Improved structure of silent tool changing arm

Technical Field

The utility model relates to a field of processing machine, in particular to be applied to tool changing mechanism and can avoid producing noiseless tool changing arm improvement structure of striking noise when detaining the sword procedure.

Background

In order to improve the working efficiency, most of the machine tools use an automatic tool changer to replace the tool on the spindle of the machine tool for the next stage of machining. The automatic tool changing mechanism is provided with a tool changing arm body, the body is provided with two arm parts, the tail ends of the two arm parts are respectively provided with a tool buckling part for combining a tool, and the two arm parts are provided with a tool supporting rod corresponding to each tool buckling part so as to support the tool against the tool buckling parts to prevent the tool from falling.

However, as shown in fig. 5A, the abutting bar 21 is sleeved with a spring 22 disposed in the two arm portions 20, and the abutting bar 21 extends out of the end of the arm portion 20 and has an abutting block 211, since the spring 22 normally urges the tool-abutting bar 21 toward the clasp (not shown), the abutting block 211 continuously extends into the clasp, and at the same time, the two arms 20 are provided with a pin 23 opposite to the tool holder 21, another spring 24 is provided under the pin 23 and continuously pushes the pin 23 upwards, when the body is rotated to make the cutter enter the clasp part, as shown in fig. 5B, the ejector pin member 23 is forced downward to press the spring 24, the tool (not shown) will directly contact the abutting block 211 to push the abutting rod 21 inward, and the elastic force of the spring 22 will make the abutting block 211 abut against the tool to stabilize the tool.

Because the rotating speed of the body is quite fast, in the process of buckling the cutter, the cutter can impact the abutting block at a high speed to form noise, the quality of a working environment is influenced, the cutter and the abutting block are easily abraded, and the machining precision is further influenced.

In view of the above, the inventor of the present invention has diligently studied and thought for many years to design a silent cutter changing arm improved structure, which is intended to improve the deficiency of the known technology and further enhance the industrial application.

SUMMERY OF THE UTILITY MODEL

The main objective of the utility model is to provide a noiseless tool changing arm improvement structure will support the cutter arbor to promote towards the rotation center direction of body through first spring continuously to cooperation knock-out spare inclined plane design, when the cutter got into the process of detaining sword portion, can avoid supporting the terminal piece and the cutter striking of supporting of cutter arbor, from this, not only can reduce produced noise when actuating, also can maintain original machining precision.

Therefore, in order to achieve the above objects, the present invention provides a silent tool-changing arm improved structure, comprising: a body, the body has a rotation center and two arm parts, the rotation center is located in the center of the body, the two arm parts extend outward from the rotation center and are located on the two sides of the body, and the tail ends of the two arm parts are both provided with a clasp knife part, the clasp knife part is provided with an opening, and the inner edge of the clasp knife part is matched with the cutter bar to be buckled and combined; two pressing units respectively arranged in the containing spaces of the two arm parts, wherein each pressing unit comprises a first spring and a pressing cutter rod, one end of the first spring is provided with a positioning piece, the pressing cutter rod is provided with a hole groove for the first spring to be arranged in the hole groove, the hole grooves are provided with concave parts arranged in pairs, so that two ends of the positioning piece protrude out of the hole groove and are clamped in the clamping grooves of the two arm parts, and the pressing cutter rod is provided with a pressing block at one end of the pressing cutter part extending out of the through hole of the two arm parts; the two ejector pin units are respectively arranged at one ends of the two arm parts, which are close to the rotating center, and each ejector pin unit comprises a second spring and an ejector pin piece, the second springs are arranged below the ejector pin pieces, one side of the ejector pin pieces, which is opposite to the cutter resisting rod, is provided with an inclined plane, and the inclined plane is inclined inwards from bottom to top; the first spring pushes the tool bar towards the direction of the rotation center continuously, and the second spring pushes the top pin continuously upwards, so that the other end of the tool bar is pressed against the inclined plane continuously.

The silent cutter changing arm improved structure is characterized in that the opening of the accommodating space is arranged on the bottom surface of the body, and a bottom cover unit is locked relative to the opening.

The improved silent tool changer arm structure comprises a bottom cover unit, a first cover body and a second cover body, wherein the first cover body is a plane body, the second cover body is provided with a plane part and a vertical part, and the through hole is arranged on the vertical part.

The improved structure of the silent tool-changing arm is supported, wherein the other end of the tool-supporting rod is further provided with a convex part, and the convex part is pressed against the inclined surface.

The improved structure of the silent cutter changing arm is supported, wherein the cutter supporting rod is a circular rod body.

Bearing the improved structure of the silent cutter changing arm, wherein the through hole is further provided with an oil seal, so that the cutter supporting rod of the circular rod body can penetrate through the through hole.

Bearing the improved structure of the silent tool-changing arm, wherein one side of the ejector pin piece is further provided with a positioning hole, and the positioning hole is used for a positioning screw to be locked in from the outer side of the body, thereby limiting the range of the ejector pin piece moving up and down.

Bearing the improved structure of the silent cutter changing arm, wherein the top of the ejector pin piece is embedded with a buffer block.

The improved structure of the silent tool changing arm is supported, wherein the rotating center is combined and fixed on a driving shaft of a tool changing device.

Drawings

Fig. 1 is a schematic perspective view of the improved structure of the silent tool-changing arm of the present invention;

FIG. 2 is a perspective view of the improved structure of the silent tool-changing arm of the present invention at another angle;

FIG. 3 is a partially exploded schematic view of FIG. 2;

fig. 4A and 4B are schematic sectional views of the improved silent tool changer arm according to the present invention in an actuated state;

fig. 5A and 5B are schematic cross-sectional views illustrating a conventional tool changer in an operating state.

In the above drawings, the reference numerals have the following meanings:

improved structure of 10 silent tool changing arm

11 main body

111 center of rotation

112 arm part

1121 space for accommodating

1122 card slot

1123 through hole

113 fastening knife part

1131 opening

12 pressing unit

121 first spring

1211 locating element

122 knife abutting bar

1221 hole groove

1221a recess

1222 resisting block

1223 projection

13 knock pin unit

131 second spring

132 knock pin member

1321 inclined plane

1322 positioning hole

1323 buffer block

14 bottom cover unit

141 first cover

142 second cover body

1421 plane part

1422 vertical section

15 oil seal

16 set screw

20 arm part

21 knife resisting rod

211 resisting block

23 knock pin member

22. 24 spring

Detailed Description

The following describes an embodiment of the present invention with reference to fig. 1 to 4B. The description is not intended to limit the embodiments of the invention but is one of the embodiments of the invention, and in the drawings and the examples, the same or similar reference numbers refer to the same, substantially the same, or functionally the same parts and elements throughout the drawings. The drawings are in a simplified form and, in all embodiments, are not drawn to precise scale.

First, please refer to fig. 1 to 3, which show an improved silent tool changer arm 10 of the present invention, comprising: a main body 11, the main body 11 having a rotation center 111 and two arms 112, the rotation center 111 being located at the center of the main body 11, the two arms 112 respectively extending outward from the rotation center 111 and being located at two sides of the main body 11, and the ends of the two arms 112 having a clasp part 113, the clasp part 113 having an opening 1131 and the inner edge of the clasp part 113 matching with a tool bar (not shown) to be clasped and combined; two pressing units 12, the two pressing units 12 are respectively disposed in the accommodating spaces 1121 of the two arm portions 112, and the two pressing units 12 both include a first spring 121 and a pressing bar 122, one end of the first spring 121 is provided with a positioning element 1211, the pressing bar 122 is provided with a hole 1221 for the first spring 121 to be disposed in the hole 1221, the hole 1221 is provided with a pair of recessed portions 1221a, so that two ends of the positioning element 1211 protrude out of the hole 1221 and are engaged with the engaging slots of the two arm portions 112, and the pressing bar 122 is provided with a pressing block 1222 extending from the through hole 1123 of the two arm portions 112 to one end of the fastening portion 113; the two knock pin units 13 are respectively arranged at one end of the two arm parts 112 close to the rotating center 111, the two knock pin units 13 both comprise a second spring 131 and a knock pin member 132, the second spring 131 is arranged below the knock pin member 132, one side of the knock pin member 132 opposite to the tool abutting bar 122 is provided with an inclined plane 1321, and the inclined plane 1321 inclines inwards from bottom to top; the first spring 121 continuously pushes the tool bar 122 toward the rotation center 111, and the second spring 131 continuously pushes the top pin 132 upward, so that the other end of the tool bar 122 continuously pushes against the inclined surface 1321. In addition, the silent tool-changing arm improved structure 10 of the present invention is combined with a driving shaft (not shown) fixed to a tool changer through the rotation center 111, and further combined with the tool changer.

Then, the opening of the accommodating space 1121 is disposed on the bottom surface of the body 11, and a bottom cover unit 14 is locked with respect to the opening, so that not only are it convenient for personnel to replace the components related to the two pressing units 12, but also dust, moisture, etc. in the environment can be prevented from entering from the top surfaces of the two arms 112, and the problems of forming dirt and sewage in the accommodating space 1121 are reduced. In addition, the bottom cover unit 14 includes a first cover 141 and a second cover 142, the first cover 141 is a planar body, the second cover 142 has a planar portion 1421 and a vertical portion 1422, and the through hole 1123 is disposed on the vertical portion 1422. In an embodiment, when the supporting rod 122 is a circular rod, an oil seal 15 is further disposed in the through hole 1123, so that the supporting rod 122 of the circular rod can be inserted through the oil seal 15, and the accommodating space 1121 is ensured to achieve a sealing effect.

Furthermore, in one embodiment, the other end of the tool bar 122 further has a protrusion 1223, and the protrusion 1223 presses against the inclined surface 1321.

However, one side of the top pin 132 is further provided with a positioning hole 1322, and the positioning hole 1322 is used for a positioning screw 16 to be locked in from the outside of the body 11, thereby limiting the range of the top pin 132 moving up and down and preventing the top pin 132 from moving left and right.

Finally, as shown in fig. 4A and 4B, when the tool fastening operation is not performed, the top pin 132 is continuously pushed upward by the elastic force of the second spring 131, and although the tool abutting bar 122 is continuously pushed toward the rotation center 111 by the elastic force of the first spring 121, the protruding portion 1223 at one end of the tool abutting bar 122 is abutted by the bottom of the inclined surface 1321, so that the tool abutting bar 122 can be positioned in an extended state (as shown in fig. 4A); however, when the cutter fastening operation is to be performed, the top pin 132 is controlled to be pressed downward to resist the elastic force of the second spring 131, and at this time, since the inclined surface 1321 is inclined inward from bottom to top and the cutter supporting rod 122 is continuously pushed toward the rotation center 111 by the first spring 121, the cutter supporting rod 122 can be retracted inward along the inclined surface 1321 to be positioned in a retracted state (as shown in fig. 4B), so as to ensure that a cutter cannot collide with the supporting block 1222 at the end of the cutter supporting rod 122 when entering the cutter fastening portion 113. After the tool fastening operation is completed, the top pin 132 is pushed upward, and the abutting block 1222 abuts against the tool bar of the tool by the contact between the bottom of the inclined surface 1321 and the protrusion 1223 of the abutting tool bar 122. However, in order to reduce the impact force of the pin member 132 when being pressed down by the tool changer, a buffer block 1323 is further embedded in the top of the pin member 132.

The event the utility model provides a noiseless tool changing arm improvement structure will support the cutter arbor to promote towards the rotation center direction of body through first spring continuously to cooperation knock pin spare inclined plane design when the cutter gets into the process of detaining sword portion, can avoid supporting the terminal piece and the cutter striking of supporting of cutter arbor, from this, not only can reduce produced noise when actuating, also can maintain original machining precision.

Claims

1. An improved structure of a silent tool-changing arm is characterized by comprising:

a body, the body has a rotation center and two arm parts, the rotation center is located in the center of the body, the two arm parts extend outward from the rotation center and are located on the two sides of the body, and the tail ends of the two arm parts are both provided with a clasp knife part, the clasp knife part is provided with an opening, and the inner edge of the clasp knife part is matched with the cutter bar to be buckled and combined;

two pressing units respectively arranged in the containing spaces of the two arm parts, wherein each pressing unit comprises a first spring and a pressing cutter rod, one end of the first spring is provided with a positioning piece, the pressing cutter rod is provided with a hole groove for the first spring to be arranged in the hole groove, the hole grooves are provided with concave parts arranged in pairs, so that two ends of the positioning piece protrude out of the hole groove and are clamped in the clamping grooves of the two arm parts, and the pressing cutter rod is provided with a pressing block at one end of the pressing cutter part extending out of the through hole of the two arm parts; and

the two ejector pin units are respectively arranged at one ends of the two arm parts, which are close to the rotating center, the two ejector pin units comprise second springs and ejector pin pieces, the second springs are arranged below the ejector pin pieces, one sides of the ejector pin pieces, which are opposite to the cutter resisting rod, are provided with inclined planes, and the inclined planes are inclined inwards from bottom to top;

the first spring pushes the tool bar towards the direction of the rotation center continuously, and the second spring pushes the top pin continuously upwards, so that the other end of the tool bar is pressed against the inclined plane continuously.

2. The improved silent cutter changing arm structure as claimed in claim 1, wherein the opening of the accommodating space is disposed on the bottom surface of the body, and a bottom cover unit is locked with respect to the opening.

3. The improved silent tool changer of claim 2, wherein the bottom cover unit comprises a first cover and a second cover, the first cover is a planar body, the second cover has a planar portion and a vertical portion, and the through hole is disposed on the vertical portion.

4. The improved silent cutter changing arm structure as claimed in claim 1, wherein the other end of the tool-supporting bar further has a protrusion, and the protrusion is pressed against the inclined surface.

5. The improved structure of silent cutter changing arm as claimed in claim 1 or 4, wherein said cutter-resisting rod is a circular rod.

6. The improved structure of silent tool-changing arm as claimed in claim 5, wherein said through hole is further equipped with an oil seal for the tool-supporting rod of said circular rod to pass through.

7. The improved silent tool change arm structure as claimed in claim 1, wherein a positioning hole is further formed on one side of the ejector pin member, and a positioning screw is locked into the positioning hole from the outside of the body, thereby limiting the range of up-and-down movement of the ejector pin member.

8. The improved structure of silent tool change arm as claimed in claim 1 or 7, wherein the top of the ejector pin is further embedded with a buffer block.

9. The improved silent tool changer arm structure of claim 1, wherein the center of rotation is coupled to a drive shaft fixed to a tool changer.