Device for measuring size of inner spherical surface of propeller connecting rod

Abstract

The utility model discloses a device for measuring the size of the inner spherical surface of a propeller connecting rod, which relates to the technical field of measuring devices and comprises a shell, a fixed measuring pin, a reset element, a movable measuring pin, a displacement element and a measurement display element, the displacement element is slidably connected to an inner cavity of the shell, and one end of the displacement element is connected with the measurement display element. The other end of the displacement element is connected with the movable measuring foot, the lower end of the movable measuring foot extends out of the shell and is used for making contact with the inner spherical surface of the propeller connecting rod, the fixed measuring foot is installed at the end, away from the measurement display element, in the shell, and the lower end of the fixed measuring foot is used for making contact with the inner spherical surface of the propeller connecting rod. The fixed measuring pin is parallel to the movable measuring pin, and the reset element is connected between the fixed measuring pin and the movable measuring pin. The device is simple in operation and high in measurement precision.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a device for measuring the inner spherical surface size of a propeller connecting rod. Background Art

[0002] The propeller is a key component in the power machinery of a turboprop aircraft. The connecting rod, as the main component of the propeller, mainly drives the pitch change of the propeller blades through the connecting rod transmission, thereby providing the maximum power (thrust or thrust) for the propeller aircraft.

[0003] The processing technology of connecting rod is complex and difficult. The processing and inspection of the inner spherical surface are more difficult, and the chord length cannot be detected by conventional measurement methods, which leads to the inability to carry out subsequent processes normally. Utility Model Content

[0004] The utility model aims to provide a device for measuring the inner spherical surface size of a propeller connecting rod, so as to solve the problems existing in the above-mentioned prior art, and has simple operation and high measurement accuracy.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a device for measuring the inner spherical surface size of a propeller connecting rod, comprising a shell, a fixed measuring foot, a reset element, a movable measuring foot, a displacement element and a measuring display element, wherein the displacement element is slidably connected to the inner cavity of the shell, one end of the displacement element is connected to the measuring display element, and the measuring display element is located outside the shell, the other end of the displacement element is connected to the movable measuring foot, the lower end of the movable measuring foot extends out of the shell and is used to contact the inner spherical surface of the propeller connecting rod, the fixed measuring foot is installed at one end of the shell away from the measuring display element, and the lower end of the fixed measuring foot is used to contact the inner spherical surface of the propeller connecting rod, the fixed measuring foot is parallel to the movable measuring foot, and the reset element is connected between the fixed measuring foot and the movable measuring foot.

[0007] Preferably, the interior of the shell is hollow, and one end of the shell away from the measuring display element is connected to a screw plug and is sealed by the screw plug.

[0008] Preferably, a measuring head is installed at the lower end of the fixed measuring foot and the lower end of the movable measuring foot, and the measuring head is used to contact the inner spherical surface of the propeller connecting rod.

[0009] Preferably, the displacement element includes a measuring rod and a pin, the measuring rod is slidably connected in the shell, and one end of the measuring rod is connected to the measuring display element, a first elongated hole is provided on the side wall of the shell, one end of the pin is fixed on the outer wall of the measuring rod, and the other end of the pin extends out through the first elongated hole, one end of the reset element is connected to the fixed measuring foot, and the other end of the reset element is sleeved on one end of the measuring rod away from the measuring display element, and is limited by a limiting step on the side wall of the measuring rod.

[0010] Preferably, a second elongated hole is further provided on the side wall of the shell, and the upper end of the movable measuring foot extends out through the second elongated hole.

[0011] Preferably, the reset element is a spring.

[0012] Preferably, the measuring display element is a pressure dial gauge, and the pressure dial gauge is connected to one end of the housing via a gauge clamp and a gauge clamp nut.

[0013] Preferably, a handle is mounted on the upper end of the shell by screws, a connecting block is mounted on the handle, and the connecting block is made of wood.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] The utility model provides a device for measuring the inner spherical surface size of a propeller connecting rod. A displacement element is slidably connected to an inner cavity of a shell, one end of the displacement element is connected to a measuring display element, and the measuring display element is located outside the shell, and the other end of the displacement element is connected to a movable measuring foot, and the lower end of the movable measuring foot extends out of the shell and is used to contact the inner spherical surface of the propeller connecting rod, and then the displacement element is driven to move by the movement of the movable measuring foot, and a small displacement of the displacement element is amplified by the measuring display element, which is convenient for reading the value, and can more intuitively and accurately measure the inner spherical surface size of the propeller connecting rod. The fixed measuring foot is installed at one end of the shell away from the measuring display element, and the lower end of the fixed measuring foot is used to contact the inner spherical surface of the propeller connecting rod. When measuring, only the movable measuring foot needs to be adjusted, and the inner spherical surface size of the propeller connecting rod can be calculated according to the moving distance of the movable measuring foot. The fixed measuring foot is parallel to the movable measuring foot, and a reset element is connected between the fixed measuring foot and the movable measuring foot. After the measurement is completed, the movable measuring foot can be automatically reset, which is convenient for the next measurement. The overall operation is simple, and the measured chord length size is accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The internal schematic diagram of the device for measuring the inner spherical surface size of a propeller connecting rod provided by the utility model when in use;

[0018] Figure 2 A schematic diagram of the external structure of a device for measuring the inner spherical surface size of a propeller connecting rod provided by the utility model;

[0019] Figure 3 is a structural schematic diagram of a propeller connecting rod;

[0020] In the figure: 1-housing, 2-movable measuring foot, 3-measuring head, 4-spring, 5-screw plug, 6-screw, 7-handle, 8-measuring rod, 9-pin, 10-rivet, 11-connecting block, 12-meter clamp, 13-meter clamp nut, 14-pressure dial gauge, 15-fixed measuring foot, 16-propeller connecting rod, 17-inner sphere. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model aims to provide a device for measuring the inner spherical surface size of a propeller connecting rod, so as to solve the problems existing in the prior art, and has the advantages of simple operation and high measurement accuracy.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figure 1-Figure 3As shown, this embodiment provides a device for measuring the size of the inner spherical surface of a propeller connecting rod, comprising a shell 1, a fixed measuring foot 15, a reset element, a movable measuring foot 2, a displacement element and a measuring display element, wherein the displacement element is slidably connected to the inner cavity of the shell 1, one end of the displacement element is connected to the measuring display element, and the measuring display element is located outside the shell 1, and the other end of the displacement element is connected to the movable measuring foot 2, the lower end of the movable measuring foot 2 extends out of the shell 1 and is used to contact the inner spherical surface 17 of the propeller connecting rod 16, and then the displacement element is driven to move by the movement of the movable measuring foot 2, and the small displacement of the displacement element is amplified by the measuring display element, which is convenient for reading the value, and can more intuitively and accurately measure the size of the inner spherical surface 17 of the propeller connecting rod 16, and the fixed measuring foot 15 is installed in the shell 1 away from One end of the measuring display element is measured, and the lower end of the fixed measuring foot 15 is used to contact the inner spherical surface 17 of the propeller connecting rod 16. When measuring, only the movable measuring foot 2 needs to be adjusted. According to the moving distance of the movable measuring foot 2, the size of the inner spherical surface 17 of the propeller connecting rod 16 can be calculated. The fixed measuring foot 15 is parallel to the movable measuring foot 2, and the reset element is connected between the fixed measuring foot 15 and the movable measuring foot 2. In the initial state, the reset element is in a natural state. When the movable measuring foot 2 and the fixed measuring foot 15 are both placed in the interval of the inner spherical surface 17 of the propeller connecting rod 16, the reset element can be stretched or compressed by adjusting the position of the movable measuring foot 2. After the measurement is completed, the movable measuring foot 2 can be automatically reset, which is convenient for the next measurement. The overall operation is simple, and the measured chord length size is accurate and reliable.

[0025] Specifically, the interior of the shell 1 is hollow, and one end of the shell 1 away from the measuring display element is connected to a screw plug 5 and sealed by the screw plug 5. The screw plug 5 and the shell 1 are connected by threads, and the screw plug 5 can seal the internal cavity of the shell 1 to prevent dust from entering the internal cavity of the shell 1.

[0026] The lower ends of the fixed measuring foot 15 and the movable measuring foot 2 are both equipped with measuring heads 3, which are used to contact the inner spherical surface 17 of the propeller connecting rod 16. The measuring head 3 is pressed onto the measuring foot through a hole to measure the chord length of the inner spherical surface 17 of the propeller connecting rod 16.

[0027] The displacement element includes a measuring rod 8 and a pin 9. The measuring rod 8 is slidably connected in the shell 1, and one end of the measuring rod 8 is connected to the measuring display element. A first elongated hole is provided on the side wall of the shell 1. One end of the pin 9 is fixed on the outer wall of the measuring rod 8, and the other end of the pin 9 extends out through the first elongated hole. The pin 9 is pressed into the measuring rod 8 through the hole and can slide left and right along the first elongated hole, thereby limiting the stroke of the measuring rod 8; one end of the reset element is connected to the fixed measuring foot 15, and the other end of the reset element is sleeved on the end of the measuring rod 8 away from the measuring display element, and is limited by the limiting step on the side wall of the measuring rod 8.

[0028] A second elongated hole is also provided on the side wall of the housing 1 , and the upper end of the movable measuring foot 2 extends out through the second elongated hole. The second elongated hole can limit the moving stroke of the movable measuring foot 2 .

[0029] The reset element is a spring 4 .

[0030] The measuring and displaying element is a pressure dial gauge 14 , which is connected to one end of the housing 1 through a gauge clamp 12 and a gauge clamp nut 13 , and the gauge clamp 12 is connected to the housing 1 through threads.

[0031] A handle 7 is mounted on the upper end of the housing 1 by means of screws 6 to facilitate measurement; a connecting block 11 is mounted on the handle 7 and fixed to the handle 7 by means of rivets 10. The connecting block 11 is made of wood to improve operational safety.

[0032] In actual application, first, the lower end face of the shell 1 is tightly fitted onto the upper end face of the propeller connecting rod 16 to be measured; then, the fixed measuring foot 15 together with the corresponding measuring head 3 is placed on one side of the inner spherical surface 17 of the propeller connecting rod 16 to be measured; then, the movable measuring foot 2 together with the corresponding measuring head 3 is placed on the other side of the inner spherical surface 17 of the propeller connecting rod 16 to be measured; then, the measuring rod 8 slides smoothly left and right along the inner cavity of the shell 1 under the action of the spring 4, and drives the movable measuring foot 2 to move left and right; when both measuring heads 3 contact the inner spherical surface 17 of the propeller connecting rod 16 to be measured, the inner arc chord length of the inner spherical surface 17 of the propeller connecting rod 16 to be measured is obtained according to the reading of the pressure dial gauge 14.

[0033] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for measuring the inner spherical dimensions of a propeller connecting rod, characterized in that: It includes a shell, a fixed measuring foot, a reset element, a movable measuring foot, a displacement element and a measuring display element, wherein the displacement element is slidably connected to the inner cavity of the shell, one end of the displacement element is connected to the measuring display element, and the measuring display element is located outside the shell, the other end of the displacement element is connected to the movable measuring foot, the lower end of the movable measuring foot extends out of the shell and is used to contact the inner spherical surface of the propeller connecting rod, the fixed measuring foot is installed at one end of the shell away from the measuring display element, and the lower end of the fixed measuring foot is used to contact the inner spherical surface of the propeller connecting rod, the fixed measuring foot is parallel to the movable measuring foot, and the reset element is connected between the fixed measuring foot and the movable measuring foot.

2. The device for measuring the inner spherical dimensions of a propeller connecting rod according to claim 1, characterized in that: The interior of the shell is hollow, and one end of the shell away from the measuring display element is connected to a screw plug and is sealed by the screw plug.

3. The device for measuring the inner spherical dimensions of a propeller connecting rod according to claim 1, characterized in that: The lower ends of the fixed measuring foot and the movable measuring foot are both equipped with measuring heads, and the measuring heads are used to contact the inner spherical surface of the propeller connecting rod.

4. The device for measuring the inner spherical dimensions of a propeller connecting rod according to claim 1, characterized in that: The displacement element includes a measuring rod and a pin, the measuring rod is slidably connected in the shell, and one end of the measuring rod is connected to the measuring display element, a first elongated hole is provided on the side wall of the shell, one end of the pin is fixed on the outer wall of the measuring rod, and the other end of the pin extends out through the first elongated hole, one end of the reset element is connected to the fixed measuring foot, and the other end of the reset element is sleeved on one end of the measuring rod away from the measuring display element, and is limited by a limiting step on the side wall of the measuring rod.

5. The device for measuring the inner spherical dimensions of a propeller connecting rod according to claim 4, characterized in that: A second elongated hole is also provided on the side wall of the shell, and the upper end of the movable measuring foot extends out through the second elongated hole.

6. The device for measuring the inner spherical dimensions of a propeller connecting rod according to claim 1, characterized in that: The reset element is a spring.

7. The device for measuring the inner spherical dimensions of a propeller connecting rod according to claim 1, characterized in that: The measuring and displaying element is a pressure dial gauge, and the pressure dial gauge is connected to one end of the shell through a gauge clamp and a gauge clamp nut.

8. The device for measuring the inner spherical dimensions of a propeller connecting rod according to claim 1, characterized in that: A handle is installed on the upper end of the shell through screws, and a connecting block is installed on the handle, and the connecting block is made of wood.

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