CN201423555Y - A protective device for measuring head - Google Patents

Abstract

The utility model discloses a protection device for a measuring head. The measuring head is fixed on the end of a measuring needle, and the measuring needle is fixed on a measuring head body. The protection device includes a clamping part for fixing the measuring head and an outer ring for protecting the measuring head, the clamping part is arranged in the outer ring, and the connection between the clamping part and the outer ring is The spaces are fixedly connected by at least one rib, and the outer diameter of the outer ring is larger than that of the probe body. The protection device of the measuring head is fixed on the measuring needle through the clamping part. When misoperation occurs, because the outer diameter of the outer ring is larger than the outer diameter of the measuring head body, the outer ring first contacts the workpiece and is deflected by force. The clamping part fixedly connected by ribs also deflects accordingly, and drives the stylus tightly fixed to the clamping part to swing an angle, thereby triggering the sensor in the probe body to send a radio signal to stop the machine tool in time, thereby Avoid damage to the probe body due to collision with the workpiece, and achieve the purpose of protecting the probe.

Description

A protective device for measuring head

technical field

The utility model relates to the fields of mechanical processing and quality inspection, in particular to a protection device for a measuring head.

Background technique

With the continuous development of modern manufacturing, manufacturing equipment is also constantly improving. CNC machine tools such as high-precision CNC lathes, machining centers, and CNC grinding machines produced today are all equipped with a high-precision probe system when they leave the factory. With this probe system, the position of the workpiece can be quickly and accurately measured on the machine tool, and the measurement result can be directly fed back to the numerical control system to correct the workpiece coordinate system of the machine tool. At the same time, the probe can be used to automatically measure the dimensional accuracy of workpieces with complex contours, automatically correct the offset of the tool according to the measurement results, and compensate for the wear of the tool to ensure that the dimensional accuracy of the processed workpiece reaches 0.01-0.02mm. Therefore, the machine tool with measuring head system has been widely used in machining.

As shown in Figure 1, the working principle of the probe system is: during normal operation, the probe 91 first touches the workpiece 94, and the probe 92 is forced to swing at an angle after touching the workpiece 94, thereby triggering the probe body 93 The sensor (not shown in the figure) sends out a radio signal, and the receiver 95 installed at the corresponding position of the machine tool will control the machine tool to perform corresponding actions after receiving the signal, and finally complete the detection work.

As shown in Fig. 2A and Fig. 2B, once the operator makes a misoperation and inputs the height of the workpiece 94 too low or too high, the probe 91 will not touch the workpiece 94 during movement, and the probe 92 will not swing without force At an angle, the sensor in the stylus body 93 cannot be triggered to send a signal, and the receiver 95 cannot receive the signal, and the machine tool continues to move forward because the signal is not received, thus causing the stylus body 93 to directly collide with the workpiece 94 Suffering varying degrees of damage increases maintenance costs and affects work progress. Therefore, how to fully protect the probe 91 without changing the original shape of the product and without affecting the accuracy of the probe, so as to avoid damage due to misoperation and impact has become an urgent problem to be solved.

Utility model content

The purpose of the utility model is to overcome the above-mentioned defects of the prior art, and provide a protection device for the measuring head, which can prevent the measuring head body from being damaged due to impact due to misoperation during machining, and finally achieve the purpose of protecting the measuring head.

The utility model is achieved in this way, a protective device for a measuring head, the measuring head is fixed on the end of a measuring needle, and the measuring needle is fixed on a measuring head body, the protecting device includes a A clamping part for fixing the probe and an outer ring for protecting the probe, the clamping part is arranged in the outer ring, the clamping part and the outer ring are fixedly connected by at least one rib, and The outer diameter of the outer ring is larger than the outer diameter of the probe body.

The protection device of the measuring head is fixed on the measuring needle through the clamping part. When misoperation occurs, because the outer diameter of the outer ring is larger than the outer diameter of the measuring head body, the outer ring first contacts the workpiece and deflects under force. The clamping part fixedly connected by ribs also deflects accordingly, and drives the stylus tightly fixed to the clamping part to swing an angle, thereby triggering the sensor in the probe body to send a radio signal to stop the machine tool in time, thereby Avoid damage to the probe body due to direct collision with the workpiece, and finally achieve the purpose of protecting the probe.

Description of drawings

Fig. 1 is a schematic diagram of the normal operation of a measuring head without a protective device in the prior art;

Fig. 2A is a schematic diagram of the abnormal operation of the measuring head without a protective device in the prior art;

Fig. 2B is another schematic diagram of the abnormal operation of the probe without protection device in the prior art;

Fig. 3A is a top view of the protection device provided by the embodiment of the present invention;

Fig. 3 B is the M-M sectional view among Fig. 3 A;

Fig. 4A is a working schematic diagram of the protection device provided by the embodiment of the present invention installed;

Fig. 4B is another schematic view of the installation of the protection device provided by the embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 3A, 3B, 4A and 4B, the utility model provides a protection device for a measuring head, the measuring head 1 is fixed at the end of a measuring needle 6, and the measuring needle 6 is fixed at a On the probe body 5, the protection device includes a clamping part 2 for fixing the probe 1 and an outer ring 3 for protecting the probe 1, the clamping part 2 is arranged in the outer ring 3, The clamping part 2 and the outer ring 3 are fixedly connected by at least one rib 4 , and the outer diameter of the outer ring 3 is larger than the outer diameter of the probe body 5 . The protection device is fixed on the stylus 6 through the clamping part 2. When misoperation occurs, because the outer diameter of the outer ring 3 is larger than the outer diameter of the probe body 5, the outer ring 3 will first contact the workpiece 7 and be affected. Force deflection, the clamping part 2 fixedly connected with the rib 4 also deflects accordingly, and drives the stylus 6 tightly fixed to the clamping part 2 to deflect at an angle, thereby triggering the sensor in the probe body 5 (not shown in the figure) send a radio signal to stop the machine tool in time, so as to prevent the probe body 5 from directly colliding with the workpiece 7 and being damaged, and finally achieve the purpose of protecting the probe 1 .

Each component of the utility model is described in detail below.

As shown in Figure 3A and Figure 3B, the clamping part 2 is set at the center of the outer ring 3 and is in the shape of a cylinder, on which there is an axially arranged hole that can accommodate the stylus 6. Through hole 21. In order to better fix the stylus 6 into the through hole 21 of the clamping part 2, the clamping part 2 is also provided with a fixing clamping hole 22 perpendicular to its axis. In this embodiment, there are specifically two The left and right symmetrical clamping holes 22 are all matched with a fastener (not shown in the figure), and the fastener in this embodiment is specifically machine screw. When assembling, the machine screw is screwed into the clamping hole 22 and abutted against the stylus 6 , so that the stylus 6 is fixed in the through hole 21 of the clamping part 2 .

Further, the clamping portion 2 and the outer ring 3 are connected by at least one rib 4, and the number of ribs 4 in this embodiment is specifically three, and they are evenly arranged. The outer ring 3 has a circular structure, and its outer diameter is larger than that of the probe body 5, so as to ensure that the outer ring 3 is in contact with the workpiece 7 before the probe body 5 in the 360° circumferential range when misoperation occurs. And the force deflects, and the clamping part 2 fixedly connected with the rib 4 also deflects accordingly, and drives the stylus 6 tightly fixed with the clamping part 2 to deflect at an angle, thereby triggering the probe body 5 The sensor (not shown in the figure) sends a radio signal, and when the receiver 8 judges that the position of the stylus 6 is incorrect according to the signal sent by the induction device, it will immediately control the motor of the machine tool to stop working, thereby preventing the probe body 5 from directly contacting the workpiece 7 is damaged by impact, and finally achieves the purpose of protecting the probe 1.

Furthermore, the clamping part 2, the outer ring 3 and the ribs 4 are all made of aluminum and processed in one piece. Aluminum has a low density and is lighter than other metal materials. It has higher sensitivity when in contact with the workpiece 7 and is easier to transmit force to the stylus 6 .

As shown in Figure 4A and Figure 4B, after the protective device is installed on the probe 6, even if the height of the workpiece 7 is too low due to the operator's misoperation, the probe 6 does not touch the workpiece 7 when it moves downward. The outer diameter of the outer ring 3 of the protection device is larger than the outer diameter of the probe body 5, so the outer ring 3 first contacts the workpiece 7 and deflects under force, and the clamping part 2 fixedly connected to it through the ribs 4 also deflects accordingly , and drive the stylus 6 tightly fixed with the clamping part to deflect an angle, thereby triggering the sensor in the probe body 5 to send a signal, when the receiver 8 judges that the position of the stylus 6 is incorrect according to the signal sent by the sensing device It will immediately control the motor of the machine tool to stop working, thereby avoiding the direct collision damage between the bottom of the probe body 5 and the workpiece 7, and achieving the purpose of protecting the probe 1. Similarly, if the operator inputs the height of the workpiece 7 too high, when the measuring head 1 moves left or right, the outer ring 3 of the protection device will first contact the workpiece 7 at any point on its circumference, and the force will The deflection drives the stylus 6 to deflect at an angle, thereby preventing the side of the stylus body 5 from colliding directly with the workpiece and being damaged, thereby achieving the purpose of protecting the stylus 1 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1, a kind of protective device of gauge head; described gauge head is fixedly arranged on the end of a chaining pin; described chaining pin is fixedly arranged on the gauge head body; it is characterized in that: this protective device comprises that a clamping portion and that is used for fixing gauge head is used to protect the outer ring of described gauge head; described clamping portion is located in the described outer ring; fixedly connected by at least one rib between described clamping portion and the outer ring, and the external diameter of described outer ring is greater than the external diameter of described gauge head body.

2, the protective device of a kind of gauge head as claimed in claim 1 is characterized in that: described clamping portion is located at the center of described outer ring.

3, the protective device of a kind of gauge head as claimed in claim 2; it is characterized in that: described clamping portion is a cylindrical shape; offer one that axially be provided with and can hold the through hole that described chaining pin is inserted on it; also offer the clamping hole perpendicular to its axis in the described clamping portion, described clamping hole cooperates with a securing member.

4, the protective device of a kind of gauge head as claimed in claim 3 is characterized in that: described securing member is the machine-processed rice screw, and described machine-processed rice screw screws in the described clamping hole and supports and terminates on the described chaining pin.

5, the protective device of a kind of gauge head as claimed in claim 1 is characterized in that: described rib is 3, and evenly is provided with.

6, the protective device of a kind of gauge head as claimed in claim 1 is characterized in that: described clamping portion, rib and outer ring are aluminium material, and one is processed into.

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