Crankshaft grinding machine follow-up measuring head displacement detection device

Abstract

The utility model provides a crankshaft grinding machine follow-up measuring head displacement detection device which comprises a base and a swing arm, a rotating shaft is fixedly arranged at one end of the swing arm, and a follow-up measuring head is arranged at the other end of the swing arm. The swing arm and the base are hinged through the rotating shaft, and the rotating shaft is connected with a detection mechanism; the detection mechanism comprises a transmission gear, a transmission rack and a force measuring device; the transmission gear is connected with the rotating shaft, the transmission rack is connected with the transmission gear in a meshed mode, and the testing end of the force measuring device is connected with one end of the transmission rack. According to the displacement detection device for the follow-up measuring head of the crankshaft grinding machine provided by the embodiment of the utility model, each position of circular motion of the follow-up measuring head can be detected, the detection precision is high, and the anti-interference capability is strong.

Description

Technical Field

[0001] The utility model relates to a displacement detection device, in particular to a displacement detection device for a follow-up probe of a crankshaft grinder. Background Art

[0002] like Figure 3 As shown, currently, the crankshaft grinder follow-up probe 4 is driven by a hydraulic cylinder 6 to move during measurement, and the position is detected by three proximity switches 7. Other use cases in the same industry are also detected by proximity switches or photoelectric sensors. The main defects of the above-mentioned prior art are:

[0003] 1) The follow-up probe has a long stroke, the proximity switch has only three points, and the detection function is limited to three points;

[0004] 2) The proximity switch has a large sensing surface, low sensing accuracy, and great limitations in position detection;

[0005] 3) The internal processing environment of the grinder is harsh, and the proximity switch joint is easily damaged by water;

[0006] 4) Proximity switches are easily affected by the ambient temperature, surrounding objects and similar switches.

[0007] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0008] The utility model aims to provide a displacement detection device for a follow-up probe of a crankshaft grinder, which can detect all positions of the circular motion of the follow-up probe, has high detection accuracy and strong anti-interference ability.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A displacement detection device for a follow-up probe of a crankshaft grinder, comprising a base and a swing arm, wherein a rotating shaft is fixedly arranged at one end of the swing arm, and a follow-up probe is arranged at the other end; the swing arm and the base are hinged via the rotating shaft, and the rotating shaft is connected to a detection mechanism;

[0011] The detection mechanism includes a transmission gear, a transmission rack and a force measuring device; the transmission gear is connected to the rotating shaft, the transmission rack is meshed with the transmission gear, and the test end of the force measuring device is connected to one end of the transmission rack.

[0012] According to one embodiment of the utility model, the end of the transmission rack is fixedly connected to one end of the spring, the other end of the spring is connected to one end of the probe rod, and the other end of the probe rod is connected to the test end of the force measuring device.

[0013] According to one embodiment of the utility model, the crankshaft grinder follow-up probe displacement detection device also includes a base, and the force measuring device is fixedly arranged on the base; a linear bearing is fixedly arranged on the base, and the probe rod is slidably arranged in the linear bearing.

[0014] According to one embodiment of the utility model, a mounting plate is fixedly provided on the base, the linear bearing is provided on a side of the mounting plate facing the force measuring device, a guide tube is provided on the other side of the mounting plate, and the spring is provided in the guide tube.

[0015] According to an embodiment of the utility model, the rotating shaft is provided with a key, and the inner wall of the transmission gear is provided with a keyway corresponding to the key.

[0016] According to an embodiment of the utility model, the force measuring device is provided with a sensor and a signal output port, and the signal output port is connected to a human-machine interface.

[0017] According to one embodiment of the utility model, a driving device for driving the swing arm to swing is provided between the base and the swing arm.

[0018] According to one embodiment of the utility model, the driving device is connected to an automatic control system, and the automatic control system is connected to the force measuring device.

[0019] According to one embodiment of the present utility model, the driving device is a hydraulic cylinder.

[0020] According to one embodiment of the utility model, the swing arm includes two supporting arms hinged to each other.

[0021] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0022] 1) The crankshaft grinder follow-up probe displacement detection device provided by the embodiment of the utility model has a detection mechanism that converts the circular motion of the follow-up probe into linear motion, and then detects whether the follow-up probe is in place by measuring the force through the force measured by the force measuring device. All positions of the circular motion of the follow-up probe can be detected, and are no longer limited to three points.

[0023] 2) The crankshaft grinder follow-up probe displacement detection device provided by the embodiment of the utility model has a detection mechanism with high detection accuracy compared to the proximity switch, can adapt to the harsh processing environment inside the grinder, and is not easily damaged by water.

[0024] 3) The crankshaft grinder follow-up probe displacement detection device provided by the embodiment of the utility model has a detection mechanism with strong anti-interference ability and is not easily affected by the ambient temperature, surrounding objects and other proximity switches, thus avoiding detection failure and greatly reducing the damage to valuable spare parts such as the follow-up probe and grinding wheel, thereby improving the stability of the equipment and ensuring production capacity output. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0026] Figure 1 A schematic diagram of the structure of a displacement detection device for a follow-up probe of a crankshaft grinder provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of a detection mechanism of a displacement detection device for a follow-up probe of a crankshaft grinder provided by an embodiment of the utility model;

[0028] Figure 3 The present invention is a structural schematic diagram of an existing crankshaft grinder follow-up probe displacement detection device.

[0029] Description of reference numerals:

[0030] 1. Base; 2. Swing arm; 21. Support arm; 3. Rotating shaft; 4. Follow-up probe; 5. Detection mechanism; 51. Transmission gear; 52. Transmission rack; 53. Force measuring device; 531. Signal output port; 54. Spring; 55. Probe rod; 56. Base; 57. Linear bearing; 58. Mounting plate; 59. Guide tube; 6. Hydraulic cylinder; 7. Proximity switch; 8. Grinding wheel. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0032] In the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. The directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense, for example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] like Figure 1 , Figure 2 As shown, the embodiment of the utility model provides a displacement detection device for a follow-up probe of a crankshaft grinder, comprising a base 1 and a swing arm 2, wherein a rotating shaft 3 is fixedly arranged at one end of the swing arm 2, and a follow-up probe 4 is arranged at the other end, and the follow-up probe 4 is used to detect the specifications of the crankshaft. The swing arm 2 is hinged to the base 1 through the rotating shaft 3, so that the swing arm 2 can drive the follow-up probe 4 to move in the circumferential direction and detect the crankshaft.

[0034] In this embodiment, the rotating shaft 3 is connected to the detection mechanism 5. Specifically, Figure 2 As shown, the detection mechanism 5 includes a transmission gear 51, a transmission rack 52 and a force measuring device 53. The transmission gear 51 is connected to the rotating shaft 3, the transmission rack 52 is meshed with the transmission gear 51, and the test end of the force measuring device 53 is connected to one end of the transmission rack 52.

[0035] The crankshaft grinder follow-up probe displacement detection device provided by the embodiment of the utility model is newly provided with a detection mechanism 5 with a transmission gear 51 and a transmission rack 52, which converts the circular motion of the follow-up probe 4 into linear motion, and then detects whether the follow-up probe 4 is in place by the magnitude of the force measured by the force measuring device 53. Since the three proximity switches in the prior art are not provided, each position of the circular motion of the follow-up probe 4 can be detected, and is no longer limited to three points. Compared with the proximity switch, the detection mechanism 5 of this embodiment has high detection accuracy, can adapt to the harsh processing environment inside the grinder, and is not easily damaged by water; in addition, it has strong anti-interference ability, is not easily affected by the ambient temperature, surrounding objects and other proximity switches, avoids detection failure, greatly reduces the damage of expensive spare parts such as the follow-up probe 4 and the grinding wheel 8, improves the stability of the equipment, and ensures the output of production capacity.

[0036] In one embodiment of the present invention, Figure 2 As shown, the end of the transmission rack 52 is fixedly connected to one end of the spring 54, and the other end of the spring 54 is connected to one end of the probe 55, and the other end of the probe 55 is connected to the test end of the force measuring device 53. The spring 54 can adapt to the large displacement of the transmission rack 52 driven by the follow-up probe 4, and transmit the force of the deformation of the spring 54 to the probe 55 so that it applies force to the test end of the force measuring device 53. The elastic force of the spring 54 changes linearly, that is, it is linearly related to the displacement of the follow-up probe 4, so that the detection accuracy of the detection mechanism 5 is high. Further, the force measuring device 53 is provided with a sensor and a signal output port 531, and the signal output port 531 is connected to the human-machine interface (not shown in the figure). The force measuring device 53 can output a 4-20mA current signal according to the force. Through the conversion of current, elastic force, and spring compression, the position change of the follow-up probe 4 can be visually observed on the HMI (human-machine interface) to prevent the follow-up probe 4 from colliding with the grinding wheel 8. The elastic force of the spring 54 and the current signal output by the force measuring device 53 both change linearly, that is, they are linearly related to the displacement of the follow-up probe 4, so that the detection accuracy of the detection mechanism 5 is high. In this embodiment, a logic control program is provided, and the linear analog signal output by the force measuring device 53 can accurately feedback the position of the follow-up probe 4, which is easy to use and can be operated on the HMI without opening the machine tool for actual viewing.

[0037] In one embodiment of the present invention, Figure 1As shown, a driving device, such as a hydraulic cylinder 6, is provided between the base 1 and the swing arm 2 to drive the swing arm 2 to swing. The driving device is connected to an automatic control system, which is connected to the force measuring device 53. The program can be optimized by using analog signals, and program interlocking can be added. When an abnormality occurs in the force measuring device 53, the driving device can be controlled to stop in time to prevent damage to the follow-up probe 4. The crankshaft grinder follow-up probe displacement detection device provided in this embodiment can avoid the high risk of machine tools after the proximity switch is damaged, which can easily lead to collisions between the follow-up probe 4, the grinding wheel 8, and the workpiece, thereby damaging valuable spare parts.

[0038] In one embodiment of the present invention, Figure 2 As shown, the displacement detection device for the follow-up probe of the crankshaft grinder also includes a base 56, and the force measuring device 53 is fixedly arranged on the base 56. A linear bearing 57 is fixedly arranged on the base 56, and the probe rod 55 is slidably arranged in the linear bearing 57 to ensure that the linear displacement of the probe rod 55 applies force to the test end of the force measuring device 53, thereby improving the accuracy of the detection. Further, a mounting plate 58 is fixedly arranged on the base 57, and the linear bearing 57 is arranged on one side of the mounting plate 58 facing the force measuring device 53, and a guide tube 59 is arranged on the other side of the mounting plate 58, and the spring 54 is arranged in the guide tube 59 to limit the radial deformation of the spring 54 during the compression process.

[0039] In one embodiment of the present invention, Figure 2 As shown, the rotating shaft 3 is connected to the transmission gear 51 through a key and a keyway. In this embodiment, a key is provided on the outer periphery of the rotating shaft 3, and a keyway corresponding to the key is provided on the inner wall of the transmission gear 51 to ensure that the rotating shaft 3 and the transmission gear 51 rotate synchronously.

[0040] In one embodiment of the present invention, Figure 1 As shown, the swing arm 2 includes two arms 21 hinged to each other to improve the adaptability of the follow-up measuring head 4.

[0041] When the displacement detection device for the follow-up probe of a crankshaft grinder provided by the embodiment of the utility model is used, the rotating shaft 3 is connected to the transmission gear 51, and the detection mechanism 5 is assembled. The hydraulic cylinder 6 drives the swing arm 2 to drive the follow-up probe 4 to move, and the rotating shaft 3 on the swing arm 2 drives the transmission rack 52 to move toward the force measuring device 53 through the transmission gear 51; the probe rod 55 and the spring 54 are supported by the base 56 and the linear bearing 57, and the deformation force of the spring 54 is transmitted to the probe rod 55 and applies force to the test end of the force measuring device 53, and the force measuring device 53 outputs a current signal to accurately feedback the position of the follow-up probe 4. The displacement detection device for the follow-up probe of a crankshaft grinder provided by the embodiment of the utility model has the following advantages:

[0042] 1) Large detection range: The detection can be performed at all positions of the circular motion of the follow-up probe, no longer limited to three points;

[0043] 2) Stable operation: The detection mechanism is resistant to pressure, wear and light collision, and can adapt to the harsh processing environment inside the grinder. It also has good shielding and anti-interference capabilities;

[0044] 3) High precision: The force measuring device outputs 4-20mA current signal, which is high precision, stable and reliable;

[0045] 4) Strong protection capability: The hydraulic cylinder drives the follow-up probe to form a closed-loop control with the detection mechanism. If the force measuring device generates an abnormal signal due to displacement deviation, the hydraulic action will be stopped immediately to avoid collision between the follow-up probe, grinding wheel and workpiece, which may damage valuable spare parts.

[0046] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A displacement detection device for a crankshaft grinder follow-up probe, characterized in that: It comprises a base (1) and a swing arm (2); a rotating shaft (3) is fixedly provided at one end of the swing arm (2), and a follow-up probe (4) is provided at the other end; the swing arm (2) and the base (1) are hingedly connected via the rotating shaft (3), and the rotating shaft (3) is connected to a detection mechanism (5); The detection mechanism (5) comprises a transmission gear (51), a transmission rack (52) and a force measuring device (53); the transmission gear (51) is connected to the rotating shaft (3), the transmission rack (52) is meshedly connected to the transmission gear (51), and a testing end of the force measuring device (53) is connected to one end of the transmission rack (52).

2. The crankshaft grinder follow-up probe displacement detection device according to claim 1, characterized in that: The end of the transmission rack (52) is fixedly connected to one end of a spring (54), the other end of the spring (54) is connected to one end of a probe rod (55), and the other end of the probe rod (55) is connected to a test end of the force measuring device (53).

3. The displacement detection device for the follow-up probe of a crankshaft grinder according to claim 2, characterized in that: It also includes a base (56), the force measuring device (53) is fixedly arranged on the base (56); a linear bearing (57) is fixedly arranged on the base (56), and the probe rod (55) is slidably arranged in the linear bearing (57).

4. The displacement detection device for the follow-up probe of a crankshaft grinder according to claim 3, characterized in that: A mounting plate (58) is fixedly provided on the base (56), the linear bearing (57) is provided on one side of the mounting plate (58) facing the force measuring device (53), a guide tube (59) is provided on the other side of the mounting plate (58), and the spring (54) is provided in the guide tube (59).

5. The displacement detection device for the follow-up probe of a crankshaft grinder according to claim 1, characterized in that: The rotating shaft (3) is provided with a key, and the inner wall of the transmission gear (51) is provided with a key groove corresponding to the key.

6. The displacement detection device for a crankshaft grinder follow-up probe according to any one of claims 1 to 5, characterized in that: The force measuring device (53) is provided with a sensor and a signal output port (531), and the signal output port (531) is connected to a human-machine interface.

7. The displacement detection device for a crankshaft grinder follow-up probe according to any one of claims 1 to 5, characterized in that: A driving device for driving the swing arm (2) to swing is provided between the base (1) and the swing arm (2).

8. The displacement detection device for the follow-up probe of a crankshaft grinder according to claim 7, characterized in that: The driving device is connected to an automatic control system, and the automatic control system is connected to the force measuring device (53).

9. The displacement detection device for the follow-up probe of a crankshaft grinder according to claim 7, characterized in that: The driving device is a hydraulic cylinder (6).

10. The displacement detection device for the follow-up probe of a crankshaft grinder according to claim 1, characterized in that: The swing arm (2) comprises two supporting arms (21) which are hinged to each other.

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