Position sensing device for rotary table

Abstract

The utility model discloses a position sensing device for a rotary table, which comprises a piston mechanism (1), a position sensing block (2) is arranged at the movable end of the piston mechanism (1), a pair of sensors (3) is arranged on the piston mechanism (1), and the sensors (3) correspond to the position sensing block (2). The oil pressure sensor has the advantages of being ingenious in structural design, low in cost and reliable in use, can effectively avoid failure of the reset spring, prevents fatigue damage and breakage of the reset spring, and can accurately provide oil pressure information.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rotary workbench spare part, especially a position sensing device for rotary workbench. BACKGROUND

[0002] At present, the pressure sensing valve for sensing whether the oil pressure in the rotary workbench is in place is arranged on the rotary workbench; the conventional pressure sensing valve resets through the action of the reset spring; since the stroke of the spring is not limited, the spring is often in the limit position during use, which makes it prone to fatigue phenomenon, and the spring will lose effect and cannot reset after a long time, and the spring may even break in severe cases. SUMMARY

[0003] The utility model discloses a position sensing device for rotary workbench which can effectively prevent the reset spring from failing.

[0004] The position sensing device for rotary workbench comprises a piston mechanism, a position sensing block is arranged on the movable end of the piston mechanism, a pair of sensors are arranged on the piston mechanism, and the sensors correspond to the position sensing block.

[0005] The piston mechanism comprises a shell, a piston rod with one end extending out of the shell is arranged in the shell, a piston is arranged at one end of the piston rod, and the piston is located in the shell; the position sensing block is arranged at the extending end of the piston rod; a reset spring is arranged on the piston rod; and a limiting mechanism for the reset spring is arranged on the inner wall of the shell.

[0006] Further, the limiting mechanism comprises a step arranged in the middle of the inner wall of the shell, and the inner diameter of the step is smaller than the outer diameter of the piston.

[0007] The sensors are connected to the shell in the following manner: an L-shaped mounting bracket is arranged at the end of the shell, the pair of sensors are arranged on the L-shaped mounting bracket, and the compression stroke of the reset spring is equal to the spacing of the pair of sensors.

[0008] In order to ensure the sealing, a sealing ring is arranged on the piston.

[0009] Due to the above technical scheme, the utility model has the advantages of ingenious structure design, low cost and reliable use, can effectively prevent the reset spring from failing, prevent the fatigue damage and breakage of the reset spring, and accurately provide oil pressure information. BRIEF DESCRIPTION OF DRAWINGS

[0010] The drawings of the utility model are described as follows:

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a cross-sectional view of the present invention;

[0013] Figure 3 This is a schematic diagram of the installation of this utility model. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. However, this utility model is not limited to these embodiments. Any improvements or substitutions based on the basic spirit of these embodiments shall still fall within the scope of protection claimed by the claims of this utility model.

[0015] Example 1: As Figure 1 , 2 As shown in Figure 3, a position sensing device for a rotary table includes a piston mechanism 1, a position sensing block 2 is provided on the movable end of the piston mechanism 1, and a pair of sensors 3 are provided on the piston mechanism 1, the sensors 3 corresponding to the position sensing block 2.

[0016] The piston mechanism 1 includes a housing 4, a piston rod 5 extending out of the housing 4, a piston 6 at one end of the piston rod 5, and the piston 6 located inside the housing 4; a position sensing block 2 is disposed at the end of the piston rod 5; a return spring 7 is disposed on the piston rod 5; and a limiting mechanism for the return spring 7 is disposed on the inner wall of the housing 4.

[0017] Further description: the limiting mechanism includes a step 8 disposed in the middle of the inner wall of the housing 4, wherein the inner diameter of the step 8 is smaller than the outer diameter of the piston 6.

[0018] In this utility model, an L-shaped mounting bracket 9 is provided at the end of the outer shell 4, and a pair of sensors 3 are mounted on the L-shaped mounting bracket 9; the compression stroke of the return spring 7 is equal to the distance between the pair of sensors 3.

[0019] To ensure a tight seal and prevent oil from entering the housing, a sealing ring 10 is provided on the piston 6.

[0020] The utility model discloses be used as follows: install the utility model to the rotary workbench 11, the oil pressure of rotary workbench 11 in promotes piston 6, and piston 6 drives piston rod 5 to move outward, and the piston rod 5 of moving drives position response block 2 to move, when sensor 3 senses the position of position response block 2, signal is delivered to rotary workbench oil supply system, and rotary workbench oil supply system stops oil supply. Among them, when piston 6 is moving, push reset spring 7 to compress, when reset spring 7 is compressed to the step 8, piston 6 cannot pass this step 8, lead to reset spring 7 no longer be compressed, and reset spring 7 also does not be at the compression limit position, and reset spring 7 still has compression amount, like this has protected reset spring 7, avoided the fatigue, failure and fracture problem of under the limit state to occur.

Claims

1. A position sensing device for a rotary table, characterized by: The device comprises a piston mechanism (1), a position sensing block (2) is arranged on the movable end of the piston mechanism (1), a pair of sensors (3) are arranged on the piston mechanism (1) and correspond to the position sensing block (2); The piston mechanism (1) comprises a shell (4), a piston rod (5) is arranged in the shell (4) and protrudes out of the shell (4), a piston (6) is arranged on one end of the piston rod (5) and located in the shell (4), the position sensing block (2) is arranged on the protruding end of the piston rod (5), a reset spring (7) is arranged on the piston rod (5), and a limiting mechanism for the reset spring (7) is arranged on the inner wall of the shell (4).

2. The position sensing device for a rotary table as set forth in claim 1, wherein: The limiting mechanism comprises a step (8) arranged in the middle of the inner wall of the shell (4), and the inner diameter of the step (8) is smaller than the outer diameter of the piston (6).

3. The position sensing device for a rotary table as set forth in claim 2, wherein: An L-shaped mounting bracket (9) is arranged on the end of the shell (4), the pair of sensors (3) are arranged on the L-shaped mounting bracket (9), and the compression stroke of the reset spring (7) is equal to the spacing of the pair of sensors (3).

4. The position sensing device for a rotary table as set forth in claim 3, wherein: A sealing ring (10) is arranged on the piston (6).

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