A crankshaft static balance detection device

Abstract

The present invention discloses a crankshaft static balance detection device, comprising: a bearing frame, a connecting pin, a tensile force sensor and a display. The main shaft of the crankshaft is rotatably connected to the bearing frame. One end of the connecting pin is hinged in the connecting rod hole of the crankshaft, and the other end of the connecting pin is connected to the tensile force sensor, and the tensile force sensor is connected to the display. When the crankshaft is stationary, due to the light weight of the whole connecting rod side of the crankshaft, affected by gravity, the connecting rod side will be subjected to a tensile force, and the tensile force will be transmitted to the connecting pin. Therefore, the tensile force sensor can detect the force state of the connecting pin. When the force change meets the preset force range threshold, it indicates that the crankshaft meets the static balance requirements, otherwise it is unqualified. Among them, the qualified or unqualified result can be displayed through the display. Among them, the tensile force sensor is used to detect the force condition to reflect the static balance condition of the crankshaft. Compared with the traditional manual visual inspection method, it has higher detection accuracy, simple operation and higher detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of crankshafts, and particularly relates to a crankshaft static balance detection device. Background Art

[0002] When manufacturing a crankshaft, a static balance test needs to be carried out to improve its running stability and service life.

[0003] Currently, it is mainly detected manually by using a mechanical balance rod. Specifically, a balance detection rod is installed on each of the left and right sides of the balance rod mounting block. A scale range is provided on one of the balance detection rods, and a weight is sleeved on this balance detection rod. By moving the weight and visually observing that the two balance detection rods are kept horizontal, if the weight is within the scale range, it is determined that the crankshaft static balance is qualified. However, this operation method has a large error and a low accuracy rate.

[0004] Therefore, how to provide a crankshaft static balance detection device to improve the detection accuracy is a technical problem that those skilled in the art need to solve currently. Summary of the Invention

[0005] The purpose of the present invention is to provide a crankshaft static balance detection device, which can effectively improve the detection efficiency and detection accuracy.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A crankshaft static balance detection device includes: a bearing frame, a connecting pin, a tension sensor and a display. The main shaft of the crankshaft is rotatably connected to the bearing frame. One end of the connecting pin is hinged in the connecting rod hole of the crankshaft, the other end of the connecting pin is connected to the tension sensor, the tension sensor is connected to the display, and the tension sensor is used to detect the force state of the connecting pin to transmit the result of whether the crankshaft meets the static balance requirement to the display for display.

[0008] Preferably, the upper end of the connecting pin is provided with a hinge shaft that cooperates with the connecting rod hole, the lower end of the connecting pin is inserted into the detection hole of the tension sensor. When the crankshaft is stationary, both the connecting pin and the connecting rod of the crankshaft are in a vertical state, and the length of the connecting pin satisfies that the axis of the main shaft and the axis of the crank pin of the crankshaft are in a horizontal state.

[0009] Preferably, the bearing frame includes a base and a roller bracket. The roller bracket is located above the base, and the main shaft is placed on the roller bracket.

[0010] Preferably, the base includes a bottom plate, a left bracket and a right bracket disposed on the bottom plate. A roller bracket is provided on each of the left bracket and the right bracket. The tensile sensor is located on the bottom plate and between the left bracket and the right bracket.

[0011] Preferably, a limiting portion for restricting axial movement of the main shaft is provided on the left bracket and / or the right bracket.

[0012] Preferably, the display is disposed on the bottom plate.

[0013] Compared with the prior art, the above technical solution has the following advantages:

[0014] 1. By using the tensile sensor to detect the force condition to reflect the static balance condition of the crankshaft, compared with the traditional manual visual inspection method, it has higher detection accuracy, simple operation and higher detection efficiency.

[0015] 2. By means of the roller bracket, the convenience and stability of the static balance detection of the crankshaft can be improved.

[0016] 3. By using the display to show the static balance detection result of the crankshaft, the detection is made more intuitive and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0018] Figure 1 FIG. is a side view of a crankshaft static balance detection device provided by a specific embodiment of the present invention;

[0019] Figure 2 FIG. is a top view of a crankshaft static balance detection device provided by a specific embodiment of the present invention.

[0020] The reference numerals are as follows:

[0021] 1 is the crankshaft, 1-2 is the main shaft, 1-3 is the crank, 1-4 is the crankpin, 1-5 is the connecting rod, 1-6 is the connecting rod hole, 2 is the connecting pin, 3 is the tensile sensor, 4 is the bottom plate, 5 is the roller bracket, 6 is the display, 7 is the left bracket, 8 is the right bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figure 1 and Figure 2 , Figure 1 which is a side view of a crankshaft static balance detection device provided by a specific embodiment of the present invention; Figure 2 which is a top view of a crankshaft static balance detection device provided by a specific embodiment of the present invention.

[0024] A crankshaft static balance detection device provided by an embodiment of the present invention, the crankshaft 1 includes a main shaft 1-2, a crank 1-3, a crank pin 1-4, and a connecting rod 1-5. The detection device includes: a carrier frame, a connecting pin 2, a tension sensor 3, and a display 6. The main shaft 1-2 of the crankshaft 1 is rotatably connected to the carrier frame. One end of the connecting pin 2 is hinged in the connecting rod hole 1-6 of the crankshaft 1, and the other end of the connecting pin 2 is connected to the tension sensor 3. The tension sensor 3 is connected to the display 6. Regarding the carrier frame, it specifically includes a base and a roller bracket 5. The roller bracket 5 is located above the base, and the main shaft 1-2 is placed on the roller bracket 5 so that the main shaft 1-2 can rotate on the roller bracket 5. Among them, the base includes a bottom plate 4 and a left bracket 7 and a right bracket 8 provided on the bottom plate 4. The left bracket 7 and the right bracket 8 are used to support the main shaft 1-2, and the display 6 can be arranged on the bottom plate 4.

[0025] When the crankshaft 1 is rotated and the crankshaft 1 is stable and stationary, since the weight on the side of the connecting rod 1-5 of the crankshaft 1 is relatively light, due to the influence of gravity, a tensile force will be applied to the connecting pin 2 through the connecting rod 1-5. Since the connecting pin 2 is connected to the tension sensor 3, the tension sensor 3 can detect the force state of the connecting pin 2. When the force change meets the preset force range threshold, it means that the crankshaft 1 meets the static balance requirements, otherwise it is unqualified. Among them, the qualified or unqualified result can be displayed through the display 6. Among them, the force condition is detected by the tension sensor 3 to reflect the static balance condition of the crankshaft 1. Compared with the traditional manual visual inspection method, it has higher detection accuracy, simple operation, and higher detection efficiency.

[0026] The upper end of the connecting pin 2 is provided with a hinge shaft that cooperates with the connecting rod hole 1-6. The lower end of the connecting pin 2 is inserted into the detection hole of the tension sensor 3. When the crankshaft 1 is stationary, both the connecting pin 2 and the connecting rod 1-5 are in a vertical state. The length of the connecting pin 2 should satisfy that the axes of the main shaft 1-2 and the crank pin 1-4 are in a horizontal state. After the crankshaft 1 rotates and then stabilizes, the connecting rod 1-5 will apply a tensile force to the tension sensor 3 through the connecting pin 2. The tension sensor 3 can obtain the change in its force, and the static balance condition of the crankshaft 1 can be reflected through this change in force. Because if there is a problem of static imbalance in the crankshaft 1, it will cause the change in the force on the tension sensor 3 not to conform to the preset force change threshold.

[0027] It should be noted that the specific working principle of the tension sensor 3 can be referred to the existing technology and will not be elaborated here. The core of this application is to apply the tension sensor 3 in the static balance detection of the crankshaft 1, so as to reflect the static balance condition of the crankshaft 1 through the detection of the connecting pin 2 by the tension sensor 3.

[0028] A roller bracket 5 is respectively provided on the left bracket 7 and the right bracket 8. The tension sensor 3 is located on the bottom plate 4 and between the left bracket 7 and the right bracket 8. During the detection, the crankshaft 1 is placed between the left bracket 7 and the right bracket 8, and the main shaft 1-2 of the crankshaft 1 is placed on the roller bracket 5. The smooth rotation of the main shaft 1-2 can be ensured by the two roller brackets 5.

[0029] Furthermore, a limiting portion is provided on the left bracket 7 or the right bracket 8, or a limiting portion is respectively provided on both of them. The axial movement of the main shaft 1-2 can be restricted through the limiting portion, and thus when the static balance of the crankshaft 1 is detected, the left and right positions of the crankshaft 1 can be ensured to be fixed.

[0030] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0031] The above has introduced in detail a device for detecting the static balance of a crankshaft provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A crankshaft static balance detection device, characterized in that, Including: A carrier, a connecting pin (2), a tensile force sensor (3) and a display (6). The main shaft (1-2) of the crankshaft (1) is rotatably connected to the carrier. One end of the connecting pin (2) is hinged in the connecting rod hole (1-6) of the crankshaft (1). The other end of the connecting pin (2) is connected to the tensile force sensor (3). The tensile force sensor (3) is connected to the display (6). The tensile force sensor (3) is used to detect the stress state of the connecting pin (2) so as to transmit the result of whether the crankshaft (1) meets the static balance requirement to the display (6) for display. An articulated shaft that cooperates with the connecting rod hole (1-6) is provided at the upper end of the connecting pin (2). The lower end of the connecting pin (2) is inserted into the detection hole of the tensile force sensor (3). When the crankshaft (1) is stationary, both the connecting pin (2) and the connecting rod (1-5) of the crankshaft (1) are in a vertical state. The length of the connecting pin (2) satisfies that the axis of the main shaft (1) and the axis of the crank pin (1-4) of the crankshaft (1) are in a horizontal state. The carrier includes a base and a roller bracket (5). The roller bracket (5) is located above the base. The main shaft (1) is placed on the roller bracket (5). The base includes a bottom plate (4) and a left bracket (7) and a right bracket (8) provided on the bottom plate (4). One roller bracket (5) is provided on each of the left bracket (7) and the right bracket (8). The tensile force sensor (3) is located on the bottom plate (4) and between the left bracket (7) and the right bracket (8). A limiting portion for restricting the axial movement of the main shaft (1) is provided on the left bracket (7) and / or the right bracket (8). The display (6) is provided on the bottom plate (4).

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