A rotating angle positioning device

Abstract

The present invention discloses a rotating fixed angle positioning device, a power wheel connected to a motor, including a notch slot arranged on the power wheel, a linear displacement slider arranged along the outer edge of the power wheel, an elastic pawl and a positioning end face fixed on the linear displacement slider, and a ratchet wheel matched with the elastic pawl, and a fixed angle positioning block matched with the positioning end face arranged on one side of the ratchet wheel. The rotating fixed angle positioning device disclosed by the present invention can achieve the precise rotating action effect of a servo motor by using a simple mechanical structure and an ordinary motor, and also has a unidirectional fixed angle rotation and positioning function, with low cost and rich functions.

Description

Technical Field

[0001] The invention relates to the field of mechanical transmission and automation, and in particular to a rotating angle positioning device in the field. Background Art

[0002] The shaft mechanisms in the production process of automated equipment often need to rotate one or more specific angles according to their design standards. The precise rotational motion is driven by a servo motor, which is costly. If the servo motor is not accurate or there is a problem with the rotation angle, the driven parts will also cause a series of subsequent problems due to the lack of limiting devices. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device which can achieve precise angular positioning function through simple mechanical transmission and structure.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A rotating fixed-angle positioning device, the improvement of which lies in: a power wheel connected to a motor, including a notched slot arranged on the power wheel, a linear displacement slider arranged along the outer edge of the power wheel, an elastic pawl and a positioning end face fixed on the linear displacement slider, and also including a ratchet wheel cooperating with the elastic pawl, and a fixed-angle positioning block cooperating with the positioning end face arranged on one side of the ratchet wheel.

[0006] Furthermore, a spring return piece is arranged on the linear displacement slider.

[0007] Furthermore, the number of teeth of the ratchet is 2 or more.

[0008] Furthermore, the ratchet and the fixed angle positioning block are fixedly connected to the shaft mechanism that needs to rotate.

[0009] The beneficial effects of the present invention are:

[0010] The rotary fixed-angle positioning device disclosed in the present invention can convert the reciprocating linear motion of the linear displacement slider into the rotary motion of the ratchet, and can control the angle of each rotation of the ratchet and position it through a fixed-angle positioning block. Specifically, the angle of each rotation of the ratchet is determined according to the number of teeth on the ratchet, and the positioning is achieved by overlapping the positioning end face on the linear displacement slider with the end face of the fixed-angle positioning block on one side of the ratchet, thereby preventing the ratchet from rotating.

[0011] The rotary fixed-angle positioning device disclosed in the present invention can achieve the precise rotary motion effect of a servo motor by using a simple mechanical structure and an ordinary motor, and also has unidirectional fixed-angle rotation and positioning functions, with low cost and rich functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1Schematic diagram I of the structure of the rotation angle positioning device disclosed in Example 1 of the present invention;

[0013] Figure 2 It is a schematic structural diagram of the pawl driving the ratchet wheel of the rotary fixed angle positioning device disclosed in Example 1 of the present invention;

[0014] Figure 3 This is a structural schematic diagram II of the rotation angle positioning device disclosed in Example 1 of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Embodiment 1, as Figure 1-3 As shown, the present embodiment discloses a rotation fixed angle positioning device, which comprises a power wheel 1 connected to a motor, a notched card slot 2 is arranged on the power wheel 1, a linear displacement slider 3 is arranged along the outer edge of the power wheel 1, an elastic pawl 4 and a positioning end face 5 are fixed on the linear displacement slider 3, and also comprises a ratchet 6 matched with the elastic pawl 4, a fixed angle positioning block 7 matched with the positioning end face 5 is arranged on one side of the ratchet 6, the ratchet 6 and the fixed angle positioning block 7 are fixedly connected to the shaft mechanism to be rotated, the number of teeth of the ratchet can be determined according to the need of the rotation angle, and the shape of the fixed angle positioning block 7 and the position of the positioning end face 5 also change accordingly. In the present embodiment, the ratchet 6 has four teeth 8, and the fixed angle positioning block 7 is four It is a square with rounded corners and has two positioning end faces on the linear displacement slider. When the power wheel 1 rotates counterclockwise, when the edge of the linear displacement slider 3 falls into the notch slot of the power wheel, the linear displacement slider 3 is pushed out, and the elastic pawl 4 moves the teeth on the ratchet, and the ratchet 6 and the fixed-angle positioning block 7 rotate 90 degrees. After rotating into place, one end face of the fixed-angle positioning block 7 coincides with a positioning end face 5 on the linear displacement slider; when the power wheel 1 rotates clockwise, the edge of the linear displacement slider 3 falls into the notch slot of the power wheel under the action of the spring return sheet 9, and the power wheel pulls the linear displacement slider 3 back, and the elastic pawl 4 cannot move the teeth on the ratchet 6, and the ratchet 6 and the fixed-angle positioning block 7 both remain in their original positions.

[0017] The rotary fixed-angle positioning device disclosed in the present embodiment, the power wheel rotates counterclockwise to drive the linear displacement slider to be pushed out, and after the ratchet is rotated 90 degrees by the elastic pawl to be positioned, no matter how many times the power wheel continues to rotate counterclockwise, the ratchet and the rotary fixed-angle positioning block will still be stuck in position and will not move again; only when the power wheel rotates clockwise to pull the linear displacement slider back to its original position, and the power wheel rotates counterclockwise again to push the linear displacement slider, can the elastic pawl drive the ratchet to rotate a second 90 degrees, and so on, thereby realizing the function of unidirectional fixed-angle positioning.

Claims

1. A rotating fixed angle positioning device, characterized in that: It includes a power wheel connected to the motor, a notch slot is arranged on the power wheel, a linear displacement slider is arranged along the outer edge of the power wheel, an elastic pawl and a positioning end face are fixed on the linear displacement slider, and it also includes a ratchet that cooperates with the elastic pawl, a fixed angle positioning block that cooperates with the positioning end face is arranged on one side of the ratchet, and a spring reset sheet is arranged on the linear displacement slider.

2. The rotation angle positioning device according to claim 1, characterized in that: The number of teeth of the ratchet is 2 or more.

3. The rotation angle positioning device according to claim 1, characterized in that: The ratchet and the fixed angle positioning block are fixedly connected to the shaft mechanism that needs to rotate.

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