Device for automatically detecting gap between photosensitive drum and developing roller

Abstract

The utility model discloses a device for automatically detecting a gap between a photosensitive drum and a developing roller, a gap shaft for mounting the developing roller is sleeved on a photosensitive drum assembly, the photosensitive drum assembly comprises a photosensitive drum, and the device comprises a support for placing the photosensitive drum assembly, a torque measuring mechanism used for driving the photosensitive drum to rotate along the axis of the photosensitive drum is arranged at one end of the support, a distance measuring mechanism is arranged on the side edge of the support, and the measuring end of the distance measuring mechanism can move in the axial direction parallel to the photosensitive drum and is used for respectively detecting the distance M of the gap shaft sleeve and the distance N of the photosensitive drum. The distance measuring mechanism and the torque measuring mechanism are both connected with the control device. According to the utility model, the accuracy of the measurement result of the gap between the photosensitive drum and the developing drum is ensured, and the measurement data can be stored in a computer connected with the control equipment for later tracing.

Description

Technical Field

[0001] This utility model relates to the field of toner cartridge technology, and in particular to a device for automatically detecting the gap between the photosensitive drum and the developing roller. Background Technology

[0002] As a two-component toner cartridge with a carrier, the distance between the photosensitive drum and the developing roller is particularly important. Too large a distance will result in a light image, while too small a distance will cause the sample to have a carrier.

[0003] Regarding the adjustment of the distance between the photosensitive drum and the developing roller, existing technologies, such as the structure for controlling the distance between the photosensitive drum and the developing roller (patent number CN203101815U), are used. However, for detecting the distance between the photosensitive drum and the developing roller, existing devices use a mechanical structure with a digital dial indicator to detect the distance between the surface of the photosensitive drum and the surface of the gap sleeve. First, the dial indicator is zeroed: an OEM photosensitive drum sample is placed on the device, with the connecting rod in contact with the drum, and the dial indicator is then zeroed. Then, the product to be measured is placed on the device, with the gap sleeve in contact with the connecting rod; the reading at this point is the distance between the surface of the photosensitive drum and the surface of the developing roller. This existing manual measuring device has low measurement efficiency, a high error rate, and the positioning reference is the lower outer surface of the photosensitive drum, which affects the measurement results. The correct reference should be the center of the photosensitive drum. Furthermore, switching between different models is complex and time-consuming. The measurement results from the mechanical structure are not accurate enough. Utility Model Content

[0004] The purpose of this utility model is to provide a device for automatically detecting the gap between the photosensitive drum and the developing roller, which solves the problems of low measurement efficiency, high error rate, and inaccurate measurement results of the existing manual measuring device.

[0005] This invention is implemented as follows: a device for automatically detecting the gap between a photosensitive drum and a developing roller, wherein a gap sleeve for mounting the developing roller is placed on a photosensitive drum assembly, the photosensitive drum assembly includes a photosensitive drum, and the device includes a support for placing the photosensitive drum. One end of the support is provided with a torque measuring mechanism for driving the photosensitive drum to rotate along the axis of the photosensitive drum, and a distance measuring mechanism is provided on one side of the support. The measuring end of the distance measuring mechanism can move along the axial direction parallel to the photosensitive drum to detect the distance M of the gap sleeve and the distance N of the photosensitive drum respectively. The distance measuring mechanism and the torque measuring mechanism are connected to a control device.

[0006] In this invention, the torque measuring mechanism is driven by a control device to rotate the photosensitive drum along its axis, preventing axis misalignment during rotation and eliminating the measurement errors caused by manually driving the photosensitive drum. The measuring end of the distance measuring mechanism can move along the axial direction parallel to the photosensitive drum. During the operation of the photosensitive drum, the distance between the two drums can be sampled multiple times through the distance measuring mechanism, ensuring the accuracy of the measurement results of the gap between the photosensitive drum and the developing drum. Furthermore, it can measure the torque of the drum itself. The data from the distance measuring mechanism and the torque measuring mechanism are connected to the control device, and the measurement data can be stored in a computer connected to the control device for easy future reference.

[0007] A further technical solution of this utility model is: the torque measuring mechanism includes a drive motor, a torque sensor and a tooling connected coaxially in sequence, the tooling being used to fix the output shaft of the drive motor and the photosensitive drum shaft coaxially.

[0008] The driving force of the drive motor is connected to the photosensitive drum assembly through a torque sensor and tooling. During the process of driving the photosensitive drum to rotate, the ranging mechanism can sample the photosensitive drum multiple times and measure the torque of the photosensitive drum. The output end of the drive motor, the torque sensor and the tooling are all coaxial, ensuring that the axis of the drive mechanism remains unchanged when driving the photosensitive drum, making the gap detection between the photosensitive drum and the developing roller more accurate.

[0009] A further technical solution of this utility model is: the tooling includes a retractable connecting part, which can be coaxially connected to the end of the photosensitive drum.

[0010] Before the product to be tested is installed onto the support, the tooling can be compressed through the connecting part to ensure that the product to be tested is installed smoothly onto the support and to avoid interference.

[0011] A further technical solution of this utility model is: the connecting part is connected to a sleeve through an elastic guide, and the sleeve is coaxially connected to the torque sensor.

[0012] The connecting part is coaxially connected to the product to be tested. The connecting part can not only avoid the installation of the product through the elastic guide, but also ensure stability during the shrinkage process. When the elastic guide shrinks, the elastic guide can shrink into the sleeve.

[0013] A further technical solution of this utility model is: the ranging mechanism includes a ranging motor, a transmission shaft and a laser ranging sensor. The laser ranging sensor is connected to the transmission shaft through a sensor bracket. The ranging motor is connected to the transmission shaft for the laser ranging sensor to move axially along the transmission shaft.

[0014] The ranging motor drives the drive shaft, which in turn moves the sensor bracket along the shaft's axis. This allows the laser ranging sensor to measure the distance between the surface of the spacing bushing and the surface of the photosensitive drum, resulting in higher accuracy.

[0015] A further technical solution of this utility model is: the laser ranging sensors are two in number and can be far apart or close to each other.

[0016] A further technical solution of this utility model is: the device further includes a main frame, the main frame includes a base and a distance measuring mounting bracket placed on the base, the support is placed on the base, and the distance measuring mounting bracket is placed on one side of the support.

[0017] The photosensitive drum assembly is placed on the support, and the ranging mechanism is placed on the side of the photosensitive drum through the ranging mounting bracket. The movement trajectory of the ranging end of the ranging mechanism is parallel to the axis of the photosensitive drum, ensuring the accuracy of the gap measurement between the photosensitive drum and the developing roller.

[0018] A further technical solution of this utility model is: the ranging mechanism is placed on the ranging mounting frame, and the ranging end of the ranging mechanism is placed above the support. This facilitates installation and measurement.

[0019] A further technical solution of this utility model is: the control device includes a control module and a display screen connected to the control module.

[0020] A method for automatically detecting the gap between a photosensitive drum and a developing roller, the method being based on the aforementioned apparatus, the method comprising the following steps:

[0021] S1. Place the photosensitive drum assembly with the gap sleeve shaft installed on the support. The photosensitive drum assembly includes the photosensitive drum.

[0022] S2. The ranging mechanism moves along the axial direction of the parallel photosensitive drum to the gap sleeve, and the measuring end of the ranging mechanism detects the distance M of the gap sleeve.

[0023] S3. The ranging mechanism moves along the axial direction of the parallel photosensitive drum to the photosensitive drum. The torque measuring mechanism drives the photosensitive drum to rotate, and the measuring end of the ranging mechanism detects the distance N between multiple photosensitive drums. n ;

[0024] S4. Based on distance M and multiple sets of distances N n The average value of the difference is the size of the gap between the photosensitive drum and the developing drum.

[0025] The beneficial effects of this invention are as follows: The device is simple to operate, provides accurate measurement data, and allows for multiple sampling to obtain an average value, reducing fluctuation errors and human error. This device eliminates the need for calibration using OEM sample photosensitive drums (OEM sample photosensitive drums refer to photosensitive drum samples produced by the original equipment manufacturer (OEM) according to the buyer's specifications and requirements), thus avoiding differences between sample photosensitive drums and OEM photosensitive drums. Furthermore, this device can obtain torque values ​​simultaneously with dimensional measurements, reducing the number of steps required for torque measurement.

[0026] All data measured by this device is stored in a computer, ensuring strong traceability. This device is an automatic measuring device, offering high measurement efficiency and reducing labor costs.

[0027] This utility model relates to an automated detection device for detecting the gap between the surface of a photosensitive drum and the surface of a developing roller. Its features include accurate measurement, ease of operation, and the ability to measure torque simultaneously with gap detection. The measurement data is automatically saved to a computer for future reference. Attached Figure Description

[0028] Figure 1 This is a schematic diagram showing the relationship between the photosensitive drum assembly, the gap bushing, and the developing drum provided by this utility model;

[0029] Figure 2 This is a front view of a device for automatically detecting the gap between a photosensitive drum and a developing roller provided by this utility model;

[0030] Figure 3 This is a perspective view of a device for automatically detecting the gap between a photosensitive drum and a developing roller, provided by this utility model.

[0031] Figure 4 This is an enlarged view of point A provided by this utility model;

[0032] Figure 5 This is a schematic diagram of the main frame provided by this utility model;

[0033] Figure 6 This is a schematic diagram of the distance measuring mechanism provided by this utility model;

[0034] Figure 7 This is a schematic diagram of the torque measuring mechanism provided by this utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the control device provided by this utility model.

[0036] Reference numerals: 1. Support, 2. Photosensitive drum,

[0037] 3. Torque measuring mechanism; 31. Drive motor; 32. Torque sensor; 33. Tooling; 331. Connecting part; 332. Elastic guide; 333. Sleeve; 34. Coupling.

[0038] 4. Distance measuring mechanism; 41. Distance measuring motor; 42. Drive shaft; 43. Laser distance measuring sensor; 44. Sensor bracket.

[0039] 5. Gap sleeve, 6. Developing roller,

[0040] 7. Control equipment; 71. Display screen; 72. Housing;

[0041] 8. Main frame, 81. Base, 82. Distance measuring mounting bracket. Detailed Implementation

[0042] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0043] Example 1:

[0044] Figure 1-8 A device for automatically detecting the gap between a photosensitive drum and a developing roller is shown. A gap sleeve 5 for mounting the developing roller 6 is provided on the photosensitive drum assembly, which includes a photosensitive drum 2. The device includes a support 1 for placing the photosensitive drum assembly. One end of the support 1 is provided with a torque measuring mechanism 3 for driving the photosensitive drum 2 to rotate along the axis of the photosensitive drum 2. A distance measuring mechanism 4 is provided on the side of the support 1. The measuring end of the distance measuring mechanism 4 can move along the axial direction parallel to the photosensitive drum 2 to detect the distance M of the gap sleeve 5 and the distance N of the photosensitive drum 2, respectively. Both the distance measuring mechanism 4 and the torque measuring mechanism 3 are connected to a control device 7.

[0045] In this invention, the torque measuring mechanism is driven by a control device to rotate the photosensitive drum along its axis, preventing axis misalignment during rotation and eliminating the measurement errors caused by manually driving the photosensitive drum. The measuring end of the distance measuring mechanism can move along the axial direction parallel to the photosensitive drum. During the operation of the photosensitive drum, the distance between the two drums can be sampled multiple times through the distance measuring mechanism, ensuring the accuracy of the measurement results of the gap between the photosensitive drum and the developing drum. Furthermore, it can measure the torque of the drum itself. The data from the distance measuring mechanism and the torque measuring mechanism are connected to the control device, and the measurement data can be stored in a computer connected to the control device for easy future reference.

[0046] In this embodiment, the torque measuring mechanism 3 includes a drive motor 31, a torque sensor 32, and a fixture 33 connected coaxially in sequence. The fixture 33 is used to fix the output shaft of the drive motor 31 to the axis of the photosensitive drum 2 in a coaxial manner.

[0047] The driving force of the drive motor is connected to the photosensitive drum assembly through a torque sensor and tooling. During the process of driving the photosensitive drum to rotate, the ranging mechanism can sample the photosensitive drum multiple times and measure the torque of the photosensitive drum. The output end of the drive motor, the torque sensor and the tooling are all coaxial, ensuring that the axis of the drive mechanism remains unchanged when driving the photosensitive drum, making the gap detection between the photosensitive drum and the developing roller more accurate.

[0048] In this embodiment, the drive motor 31 is a servo motor, the torque sensor 32 is a high-precision torque sensor, the drive motor 31 is connected to the torque sensor 32 through a coupling 34 and a flange, and the torque sensor 32 is connected to the tooling 33 through another flange.

[0049] In this embodiment, both the torque sensor 32 and the drive motor 31 are connected to the main frame 8 via mounting brackets.

[0050] In this embodiment, the tooling 33 includes a retractable connecting part 331, which can be coaxially connected to the end of the photosensitive drum 2.

[0051] Before the product to be tested is installed onto the support, the tooling can be compressed through the connecting part to ensure that the product to be tested is installed smoothly onto the support and to avoid interference.

[0052] In this embodiment, the connecting part 331 is connected to the sleeve part 333 through the elastic guide 332, and the sleeve part 333 is coaxially connected to the torque sensor 32.

[0053] The connecting part is coaxially connected to the product to be tested. The connecting part can not only avoid the installation of the product through the elastic guide, but also ensure stability during the shrinkage process. When the elastic guide shrinks, the elastic guide can shrink into the sleeve.

[0054] In this embodiment, one end of the connecting part 331 can extend into the end of the photosensitive drum assembly, and the drive motor 31 can drive the photosensitive drum 2 to rotate through the connecting part 331; the other end of the connecting part 331 is provided with an elastic guide 332.

[0055] In this embodiment, the elastic guide 332 includes a central shaft and an auxiliary shaft disposed on the outer periphery of the central shaft. A spring is sleeved on the central shaft. The central shaft is connected to the center of the connecting portion 331, and the auxiliary shaft passes through the connecting portion 331. The central shaft can retract into the sleeve 333.

[0056] In this embodiment, the drive motor 31 is a servo motor.

[0057] In this embodiment, as Figure 7 The torque measuring mechanism 3 consists of a high-precision dynamic torque sensor 32, a torque measuring fixture 33, a servo motor, a coupling 34, and a servo motor base. The servo motor base is bolted to the base 81, and the servo motor is bolted to the servo motor base. The servo motor, torque measuring fixture 33, and high-precision dynamic torque sensor 32 are connected by a flange, and the high-precision dynamic torque sensor 32 is connected to the servo motor by a coupling 34.

[0058] In this embodiment, the ranging mechanism 4 includes a ranging motor 41, a transmission shaft 42, and a laser ranging sensor 43. The laser ranging sensor 43 is connected to the transmission shaft 42 via a sensor bracket 44. The ranging motor 41 is connected to the transmission shaft 42 for the laser ranging sensor 43 to move along the axial direction of the transmission shaft 42.

[0059] The ranging motor drives the drive shaft, which in turn moves the sensor bracket along the shaft's axis. This allows the laser ranging sensor to measure the distance between the surface of the spacing bushing and the surface of the photosensitive drum, resulting in higher accuracy.

[0060] In this embodiment, there are two laser rangefinders 43, which can be either far apart or close to each other.

[0061] In this embodiment, the drive shaft 42 is a bidirectional lead screw, and the sensor bracket 44 is connected to the slide of the bidirectional lead screw.

[0062] In this embodiment, the sensor bracket 44 is L-shaped.

[0063] In this embodiment, the ranging motor 41 is a servo motor.

[0064] In this embodiment, as Figure 6 The laser ranging mechanism 4 consists of one servo motor, one bidirectional sliding lead screw, two high-precision laser ranging sensors, and two sensor brackets. The lead screw is bolted to the laser ranging frame, and the two high-precision laser ranging sensors are bolted to the two sensor brackets respectively. The sensor brackets are bolted onto the slide of the lead screw.

[0065] In this embodiment, the device further includes a main frame 8, which includes a base 81 and a distance measuring mounting bracket 82 placed on the base 81. The support 1 is placed on the base 81, and the distance measuring mounting bracket 82 is placed on one side of the support 1.

[0066] The photosensitive drum assembly is placed on the support, and the ranging mechanism is placed on the side of the photosensitive drum through the ranging mounting bracket. The movement trajectory of the ranging end of the ranging mechanism is parallel to the axis of the photosensitive drum, ensuring the accuracy of the gap measurement between the photosensitive drum and the developing roller.

[0067] In this embodiment, there are two supports 1, namely a left support and a right support, and the photosensitive drum assembly with the gap bushing 5 is supported by the left and right supports.

[0068] In this embodiment, the support 1 is positioned at the front of the base 81, and the ranging mounting bracket 82 is positioned at the rear of the base 81. The extending direction of the ranging mounting bracket 82 is parallel to the straight line where the support 1 is located.

[0069] In this embodiment, the control device 7 is located on the right side of the base 81. In another embodiment, the control device 7 is located on the left side of the base 81.

[0070] In this embodiment, the ranging mechanism 4 is placed on the ranging mounting frame 82, and the ranging end of the ranging mechanism 4 is positioned above the support 1. This facilitates installation and measurement.

[0071] In this embodiment, the photosensitive drum assembly with the gap sleeve 5 is placed on the support 1, and the laser range sensor 43 on the ranging mechanism 4 is placed directly above the photosensitive drum 2 and the gap sleeve 5.

[0072] In another embodiment, the laser rangefinder 43 is placed on the side or bottom of the photosensitive drum 2.

[0073] In this embodiment, as Figure 5 The main frame 8 consists of a base 81, a left support for the product, a right support for the product, and a laser ranging frame 82. The left and right supports for the product and the laser ranging frame 82 are fixed to the base 81 with bolts. The laser ranging frame 81 is constructed of aluminum profiles and is secured with angle brackets and bolts.

[0074] In this embodiment, the control device 7 includes a control module and a display screen 71 connected to the control module.

[0075] In this embodiment, the control device 7 further includes a housing 72, the control module is placed inside the housing 72, and the display screen 71 is placed on the front of the housing 72.

[0076] In this embodiment, the control device 7 is placed at the end of the base 81.

[0077] In this embodiment, as Figure 8The control device 7 mainly consists of a display screen 71 and a display screen housing 72. The display screen 71 is installed in the display screen housing 72, which is fixed to the base with bolts. The display screen housing contains a control module that communicates with the display screen.

[0078] like Figure 2 The utility model shown consists of four parts: a main frame 8, a ranging mechanism 4, a torque measuring mechanism 3, and a control device 7 containing a host computer.

[0079] Example 2:

[0080] A method for automatically detecting the gap between a photosensitive drum and a developing roller, the method being based on the apparatus described in Embodiment 1, the method comprising the following steps:

[0081] S1. Place the photosensitive drum assembly with the gap sleeve 5 installed on the support 1; the photosensitive drum assembly includes the photosensitive drum 2;

[0082] S2. The ranging mechanism 4 moves along the axial direction of the parallel photosensitive drum 2 to the gap sleeve 5, and the measuring end of the ranging mechanism 4 detects the distance M of the gap sleeve 5.

[0083] S3. The ranging mechanism 4 moves along the axial direction of the parallel photosensitive drum 2 to the photosensitive drum 2. The torque measuring mechanism 3 drives the photosensitive drum 2 to rotate. The measuring end of the ranging mechanism 4 detects the distance N of multiple photosensitive drums 2. n ;

[0084] S4. Based on distance M and multiple sets of distances N n The average value of the difference is the size of the gap between the photosensitive drum and the developing drum.

[0085] In this embodiment, the torque measuring mechanism 3 drives the photosensitive drum 2 to rotate 90° each time, recording four torque values. At this time, four N values ​​are read, where N... n It is N4.

[0086] The working principle of this invention is as follows: The distance measurement function of this invention is achieved by two high-precision laser rangefinders. The drum unit is correctly fixed on the left and right supports to ensure it does not wobble, and the measuring surface of the clearance sleeve is parallel to the base. The rangefinder motor drives the bidirectional lead screw, and the sensor bracket moves the laser sensor left and right simultaneously to the position of the clearance sleeve. At this time, the data from the laser sensor is read as the baseline value M. The servo motor continues to work, and the laser sensor moves to the measuring position of the photosensitive drum, reading the data N at this time. The torque measuring mechanism starts to drive the photosensitive drum to rotate, rotating 90° each time, recording four torque values. At this time, four N values ​​are read. The average of the differences between each N value and the M value is the distance between the surface of the photosensitive drum and the surface of the developing roller.

[0087] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for automatic detection of the gap between a photosensitive drum and a developing roller, for mounting a gap bushing (5) of a developing roller (6) on a photosensitive drum assembly comprising a photosensitive drum (2), said device comprising a support (1) for placing the photosensitive drum assembly, characterized in that: One end of the support (1) is provided with a torque measuring mechanism (3) for driving the photosensitive drum (2) to rotate along the axis of the photosensitive drum (2). The side of the support (1) is provided with a distance measuring mechanism (4). The measuring end of the distance measuring mechanism (4) can move along the axial direction parallel to the photosensitive drum (2) to detect the distance M of the gap bushing (5) and the distance N of the photosensitive drum (2) respectively. Both the distance measuring mechanism (4) and the torque measuring mechanism (3) are connected to the control device (7).

2. The apparatus for automatically detecting the gap between the photoreceptor drum and the developer roller according to claim 1, characterized by: The torque measuring mechanism (3) includes a drive motor (31), a torque sensor (32), and a tooling (33) connected coaxially in sequence. The tooling (33) is coaxially connected to the photosensitive drum (2).

3. The apparatus for automatically detecting the gap between the photoreceptor drum and the developer roller according to claim 2, characterized by: The tooling (33) includes a telescopic connecting part (331), which is coaxial with and detachably connected to the end of the photosensitive drum (2).

4. The apparatus for automatically detecting the gap between the photoreceptor drum and the developer roller according to claim 3, characterized by: The connecting part (331) is connected to a sleeve (333) via an elastic guide (332), and the sleeve (333) is coaxially connected to the torque sensor (32).

5. The apparatus for automatically detecting the gap between the photoreceptor drum and the developer roller according to any one of claims 1 to 4, characterized by: The ranging mechanism (4) includes a ranging motor (41), a transmission shaft (42), and a laser ranging sensor (43). The laser ranging sensor (43) is connected to the transmission shaft (42) via a sensor bracket (44). The ranging motor (41) is connected to the transmission shaft (42) for the laser ranging sensor (43) to move along the axial direction of the transmission shaft (42).

6. The apparatus for automatically detecting the gap between the photoreceptor drum and the developer roller according to claim 5, characterized by: The laser rangefinder (43) consists of two sensors that can be positioned far apart or close together.

7. The apparatus for automatically detecting the gap between the photosensitive drum and the developing roller according to any one of claims 1-4, characterized in that: The device also includes a main frame (8), which includes a base (81) and a distance measuring mounting bracket (82) placed on the base (81). The support (1) is placed on the base (81), and the distance measuring mounting bracket (82) is placed on one side of the support (1).

8. The apparatus for automatically detecting the gap between the photoreceptor drum and the developer roller according to claim 7, characterized by: The ranging mechanism (4) is placed on the ranging mounting frame (82), and the ranging end of the ranging mechanism (4) is placed above the support (1).

9. The apparatus for automatically detecting the gap between the photoreceptor drum and the developer roller according to any one of claims 1 to 4, characterized by: The control device (7) includes a control module and a display screen (71) connected to the control module.

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