Milling head positioning and locking structure

Abstract

The utility model discloses a milling head positioning and locking structure, which belongs to the field of machine tools, and comprises a milling head, a connecting seat and a key seat, the key seat is in transmission connection with the milling head, the connecting seat and the key seat are coaxially arranged, the key seat is positioned in the connecting seat, and the key seat is provided with a transmission groove. The milling head positioning and locking structure further comprises a pin shaft, a locking assembly and an elastic piece, the pin shaft is installed on the connecting base in a floating mode through the elastic piece, the locking assembly is fixed to the pin shaft, when the milling head is not installed, the pin shaft stretches out of the connecting base, the locking assembly is located in the transmission groove, and the key base, the milling head and the connecting base are located at fixed angles. When the milling head is installed, the pin shaft is abutted to drive the locking assembly to be separated from the transmission groove, the milling head can rotate relative to the connecting base, the transmission key groove without the milling head is located at a fixed angle, and the milling head is convenient to install.

Description

Technical Field

[0001] The utility model relates to the field of machine tools, and in particular to a positioning and locking structure for a milling head. Background Art

[0002] The numerically controlled boring and milling machine is one of the numerically controlled machine tools that are widely used. It can realize functions such as drilling, reaming, boring, cutting grooves, and planing in one clamping, and can perform angular milling, turning boring, and multi-faceted machining on the workpiece installed on the rotary worktable. When using the continuous indexing function of the rotary worktable, it can continuously machine the cylindrical surface or end face. In addition, a variety of accessory heads can be selected and equipped, such as various milling heads, to further expand the processing range and improve the processing efficiency.

[0003] To meet the different processing requirements for parts, it is generally necessary to replace the milling head on the numerically controlled boring and milling machine. When the existing milling head is installed, the position of the transmission key groove is observed by the naked eye, and the milling head is manually connected. Later, the position of the transmission key groove is located by the transmission of the machine tool itself. It is easy to have inaccurate positioning, resulting in connection failure and causing a fault alarm. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, one of the purposes of the utility model is to provide a positioning and locking structure for a milling head that can effectively ensure that the transmission key groove of the milling head is at a fixed angle, facilitating the installation of the milling head.

[0005] One of the purposes of the utility model is realized by adopting the following technical scheme:

[0006] A positioning and locking structure for a milling head, comprising a milling head, a connecting seat, and a key seat. The key seat is in transmission connection with the milling head. The connecting seat is coaxially arranged with the key seat. The key seat is located inside the connecting seat. The key seat is provided with a transmission groove. The positioning and locking structure for the milling head further includes a pin shaft, a locking assembly, and an elastic member. The pin shaft is floatingly installed in the connecting seat through the elastic member. The locking assembly is fixed to the pin shaft. When the milling head is not installed, the pin shaft extends out of the connecting seat, and the locking assembly is located in the transmission groove. The key seat and the milling head are at a fixed angle with the connecting seat. When the milling head is installed, the pin shaft is abutted to drive the locking assembly out of the transmission groove, and the milling head can rotate relative to the connecting seat.

[0007] Further, the axis of the pin shaft is parallel to the axis of the connecting seat.

[0008] Further, the pin shaft is slidably installed in the connecting seat, and both ends of the elastic member are respectively abutted against the connecting seat and the pin shaft.

[0009] Furthermore, the milling head positioning and locking structure also includes a mounting pin, the mounting pin is fixed to the connecting seat, the mounting pin is coaxially arranged with the pin shaft, and the elastic member is sleeved on the mounting pin.

[0010] Furthermore, the locking assembly includes a locking key and a locking member, the end of the locking key is sleeved on the pin shaft, and the locking member fixes the locking key to the pin shaft.

[0011] Furthermore, the locking assembly also includes a gasket, and the gasket is located between the locking key and the locking member.

[0012] Furthermore, the locking piece is a locking nut.

[0013] Furthermore, the milling head positioning and locking structure also includes a pull nail, and the pull nail is fixed to an end of the connecting seat away from the milling head.

[0014] Furthermore, the milling head positioning and locking structure also includes a sensing screw, and the sensing screw is fixed to an end of the connecting seat away from the milling head.

[0015] Furthermore, there are multiple transmission grooves, and the multiple transmission grooves are symmetrical about the centroid of the key seat.

[0016] Compared with the prior art, the pin shaft of the milling head positioning and locking structure of the utility model is floatingly installed on the connecting seat through the elastic member, and the locking assembly is fixed to the pin shaft. When the milling head is not installed, the pin shaft extends out of the connecting seat, the locking assembly is located in the transmission groove, and the key seat and the milling head are at a fixed angle with the connecting seat; when the milling head is installed, the pin shaft is resisted and drives the locking assembly to disengage from the transmission groove, and the milling head can rotate relative to the connecting seat. Through the above design, the milling head is locked and cannot rotate when it is not installed, and the milling head and the connecting seat are at a fixed angle; when the milling head is installed, the pin shaft is resisted and drives the locking assembly to disengage from the transmission groove, and the milling head can rotate relative to the connecting seat, so that the transmission groove where the milling head is not installed is at a fixed angle, which is convenient for the installation of the milling head. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the positioning and locking structure of the milling head of the utility model;

[0018] Figure 2 for Figure 1 A cross-sectional view of a positioning locking structure;

[0019] Figure 3 for Figure 2 A schematic diagram of the pin shaft of the positioning locking structure being in a top-return state;

[0020] Figure 4 forFigure 2 Schematic diagram of the pin shaft of the positioning and locking structure in the ejected state.

[0021] In the figure: 10, milling head; 20, connecting seat; 30, key seat; 31, transmission groove; 40, pull stud; 50, induction screw; 60, locking assembly; 61, locking key; 62, gasket; 63, locking piece; 70, stop block; 80, pin shaft; 90, mounting pin; 100, elastic member. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be another intermediate component through which it is fixed. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Please refer to Figures 1 to 4 , a milling head positioning and locking structure of the present invention includes a milling head 10, a connecting seat 20, a key seat 30, a pull stud 40, an induction screw 50, a locking assembly 60, a stop block 70, a pin shaft 80, a mounting pin 90 and an elastic member 100.

[0026] The milling head 10 is rotatably connected to the connecting seat 20, and the connecting seat 20 is used to mount the milling head 10 to the main shaft.

[0027] The key seat 30 is drivingly connected to the milling head 10, and the key seat 30 rotates synchronously with the milling head 10. The axis of the key seat 30 and the axis of the milling head 10 are located on the same straight line. The key seat 30 is located within the connection seat 20. A driving groove 31 is provided on one side of the key seat 30 facing the main shaft. When the milling head 10 is not installed, the driving groove 31 is used to lock the milling head 10 so that the milling head 10 can be installed at a fixed angle, facilitating installation. When the milling head 10 is installed, the driving groove 31 is buckled with the main shaft so that the main shaft can drive the milling head 10 to rotate. Specifically, the driving groove 31 is in a shape of a straight line, and a part of the driving groove 31 is a slotted structure so that the locking key 61 can disengage from the driving groove 31. The number of the driving grooves 31 is multiple, and the multiple driving grooves 31 are symmetric about the centroid of the key seat 30. In this embodiment, the number of the driving grooves 31 is four, and the four driving grooves 31 are arranged in a cross shape.

[0028] The pull stud 40 is fixed to one end of the connection seat 20 away from the milling head 10. The pull stud 40 is used to cooperate with the main shaft. Specifically, the connection seat 20 is square, and the number of the pull studs 40 is four. The four pull studs 40 are respectively arranged at the four corners of the connection seat 20.

[0029] The induction screw 50 is fixed to one end of the connection seat 20 away from the milling head 10. The induction screw 50 is used for the proximity switch on the ram to sense and output a signal to the machine tool to indicate that the automatic connection is completed.

[0030] The locking assembly 60 includes a locking key 61, a gasket 62 and a locking member 63. The locking key 61 is fixed to the pin shaft 80. The locking key 61 is used to buckle with the driving groove 31 to lock the key seat 30 and the connection seat 20. The gasket 62 is located between the locking key 61 and the locking member 63 and is used for locking the locking key 61. The locking member 63 is threadedly connected to the pin shaft 80 and is used to fix the locking key 61. Specifically, the locking member 63 is a locking nut.

[0031] The stop block 70 is used to install the pin shaft 80. The stop block 70 is fixed to one end of the connection seat 20 away from the milling head 10. A through hole is provided on the stop block 70, and the pin shaft 80 is slidably installed in the through hole. When the milling head 10 is not installed, the pin shaft 80 extends out of the through hole. When the milling head 10 is installed, the pin shaft 80 is retracted into the through hole by being abutted.

[0032] The pin shaft 80 is floatingly installed in the connection seat 20. Specifically, the pin shaft 80 is slidably installed in the connection seat 20 and the stop block 70. The elastic member 100 is installed in the connection seat 20, and both ends of the elastic member 100 are respectively abutted against the connection seat 20 and the pin shaft 80. The axis of the pin shaft 80 is parallel to the axis of the key seat 30.

[0033] The mounting pin 90 is fixed to the connection seat 20. When the elastic member 100 is sleeved on the mounting pin 90, the mounting pin 90 prevents the elastic member 100 from being twisted.

[0034] When using the positioning and locking structure of the milling head, when the milling head 10 is not installed, the pin shaft 80 is resisted by the elastic member 100, and the pin shaft 80 extends out of the stopper 70. At this time, driven by the pin shaft 80, the locking key 61 is located in the transmission groove 31. At this time, the locking key 61 is locked with the key seat 30, the milling head 10 is locked and cannot rotate, the milling head 10 and the connecting seat 20 are at a fixed angle, and the milling head 10 is in the 0-degree position, which is convenient for installation. When the milling head 10 is installed on the machine tool ram, the pin shaft 80 is resisted by the ram, the elastic member 100 is compressed, the pin shaft 80 drives the locking key 61 of the locking assembly 60 to disengage from the transmission groove 31, and the transmission key of the machine tool spindle is inserted into the transmission groove 31 of the key seat 30, and the milling head 10 can rotate; at the same time, the pull stud 40 is tightened, and the proximity switch on the ram senses the position of the sensing screw 50 and outputs a signal to the machine tool to indicate that the automatic connection is completed.

[0035] The positioning and locking structure of the milling head of the present utility model makes the transmission groove 31 of the uninstalled milling head 10 at a fixed angle, which is convenient for the installation of the milling head 10.

[0036] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made. These are all equivalent modifications and evolutions made to the above embodiments based on the substantial technology of the present utility model, and these all belong to the protection scope of the present utility model.

Claims

1. A milling head positioning and locking structure, comprising a milling head, a connecting seat and a key seat. The key seat is in transmission connection with the milling head. The connecting seat is coaxially arranged with the key seat. The key seat is located inside the connecting seat, and is characterized in that: The key base is provided with a transmission groove. The milling head positioning and locking structure further includes a pin shaft, a locking assembly, and an elastic member. The pin shaft is floatingly mounted on the connection seat through the elastic member. The locking assembly is fixed to the pin shaft. When the milling head is not installed, the pin shaft extends out of the connection seat, the locking assembly is located in the transmission groove, and the key base and the milling head are at a fixed angle with the connection seat. When the milling head is installed, the pin shaft is pushed against to drive the locking assembly out of the transmission groove, and the milling head can rotate relative to the connection seat.

2. The milling head positioning and locking structure according to claim 1, wherein: The axis of the pin shaft is parallel to the axis of the connection seat.

3. The milling head positioning and locking structure according to claim 1, characterized in that: The pin shaft is slidably mounted on the connection seat, and both ends of the elastic member are in contact with the connection seat and the pin shaft respectively.

4. The milling head positioning and locking structure according to claim 3, wherein: The milling head positioning and locking structure further includes a mounting pin. The mounting pin is fixed to the connection seat, the mounting pin is coaxially arranged with the pin shaft, and the elastic member is sleeved on the mounting pin.

5. The milling head positioning and locking structure according to claim 1, characterized in that: The locking assembly includes a locking key and a locking member. The end of the locking key is sleeved on the pin shaft, and the locking member fixes the locking key to the pin shaft.

6. The milling head positioning and locking structure according to claim 5, characterized in that: The locking assembly further includes a gasket, and the gasket is located between the locking key and the locking member.

7. The milling head positioning and locking structure according to claim 5, wherein: The locking member is a locking nut.

8. The milling head positioning and locking structure according to claim 1, characterized in that: The milling head positioning and locking structure further includes a pull stud, and the pull stud is fixed to one end of the connection seat away from the milling head.

9. The milling head positioning and locking structure according to claim 1, wherein: The milling head positioning and locking structure further includes an induction screw, and the induction screw is fixed to one end of the connection seat away from the milling head.

10. The milling head positioning and locking structure according to claim 1, wherein: The number of the transmission grooves is multiple, and the multiple transmission grooves are symmetric about the centroid of the key base.

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