阅读说明：本技术 一种轴承用注脂机、控制系统及控制方法 (Grease injection machine for bearing, control system and control method ) 是由 阚亚雄 赵飞 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种轴承用注脂机、控制系统及控制方法。它包括机架、机架上设置的注脂机构以及旋转匀脂机构,注脂机构能够从待注脂的轴承的内圈缝隙内部进行注脂,旋转匀脂机构能够推动轴承的外圈旋转运动并带动注入到轴承内的润滑脂一并旋转进行匀脂,机架上设置有位于注脂机构和旋转匀脂机构下方的轴承输送机构,轴承输送机构能够将轴承移动至注脂机构正下方进行注脂作业或移动至匀脂机构正下方进行匀脂作业。其优点是：整体机械结构和控制系统有机结合,相辅相成,不但结构设计巧妙,安装方便,而且自动化程度高,注脂快速、均匀和准确,且注脂量可调整,能够适应不同种类的轴承的注脂要求,提高轮毂轴承注脂质量、节约油脂、降低了采购成本。(The invention discloses a grease injection machine for a bearing, a control system and a control method. It includes the frame, annotate fat mechanism and rotatory even fat mechanism of notes that set up in the frame, annotate fat mechanism and can annotate the fat from the inner circle gap inside of waiting to annotate the bearing of fat, rotatory even fat mechanism can push the outer lane rotary motion of bearing and drive the lubricating grease of injecting into the bearing and rotate in the lump and carry out even fat, be provided with in the frame and be located annotate the bearing conveying mechanism of fat mechanism and rotatory even fat mechanism below, bearing conveying mechanism can move the bearing and annotate the fat operation or move and carry out even fat operation under even fat mechanism to annotating under the fat mechanism. The advantages are that: the integral mechanical structure and the control system are organically combined and complement each other, the structure design is ingenious, the installation is convenient, the automation degree is high, the grease injection is quick, uniform and accurate, the grease injection amount is adjustable, the grease injection requirements of different types of bearings can be met, the grease injection quality of the hub bearing is improved, the grease is saved, and the purchase cost is reduced.)

1. The utility model provides a wheel hub bearing is with annotating fat machine which characterized in that: annotate fat mechanism (3) and be used for carrying out even fat rotatory even fat mechanism (4) of even fat to the bearing of annotating after the fat that set up including frame (1), annotate fat mechanism (3) and can follow the inner circle gap inside of waiting to annotate fat bearing (2) annotate the fat, rotatory even fat mechanism (4) can promote the outer lane rotary motion of bearing (2) and drive the lubricating grease of injecting into the bearing and rotate in the lump and carry out even fat, be provided with on frame (1) and be located and annotate the bearing conveying mechanism (5) of fat mechanism and rotatory even fat mechanism below, bearing conveying mechanism (5) can move bearing (2) and annotate the fat operation or move and carry out even fat operation under even fat mechanism under annotating the fat mechanism.

2. The grease injecting machine for bearings according to claim 1, wherein: annotate fat mechanism (3) including annotating fat actuating cylinder (6) that the frame top set up, connect annotate fat hydro-cylinder (7) and the tubulose notes fat head (8) of connection on the piston rod of annotating the fat hydro-cylinder in the piston rod bottom of annotating the fat actuating cylinder, still including annotating fat bucket (9) and filling fat jar (10) that are located frame one side, filling fat jar (10) are connected through filling fat conveyer pipe (11) and are annotated fat hydro-cylinder (7) and can be carried to annotating fat hydro-cylinder department by filling the fat conveyer pipe after with lubricating grease extrusion, and then are annotated the fat head and pour into the bearing inner circle gap with lubricating grease inside by the tubulose.

3. The grease injecting machine for bearings according to claim 2, characterized in that: the top of the grease filling cylinder (10) is provided with a grease filling motor (30), and when the grease filling motor (30) is started, grease filling operation can be carried out in the grease filling barrel (9).

4. A grease injecting machine for a bearing according to claim 3, characterized in that: rotatory even fat mechanism (4) include even fat actuating cylinder (12) that the frame top set up, connect even fat motor (13) in the piston rod bottom of even fat actuating cylinder and connect even fat fixed disk (14) in even fat motor bottom, even fat fixed disk (14) can promote bearing inner race rotary motion and drive the interior lubricating grease of bearing even fat in the lump rotation.

5. A grease injecting machine for bearings according to claim 4, characterized in that: bearing conveying mechanism (5) guide rail (15) that set up in the frame, guide rail slider (16) of installation on the guide rail and can drive guide rail slider along guide rail reciprocating motion's guide rail motor (17), thereby fixed mounting has bearing unable adjustment base (18) that are used for settling the bearing on guide rail slider (16), thereby guide rail motor (17) can drive the action of guide rail slider and drive bearing unable adjustment base and move to corresponding station along the guide rail in the lump.

6. A grease injecting machine for bearings according to claim 5, characterized in that: annotate fat actuating cylinder (6) and drive the cylinder for annotating the fat, even fat actuating cylinder (12) are even fat actuating cylinder, fat cylinder (10) are the fat cylinder, annotate fat actuating cylinder and even fat actuating cylinder and drive the cylinder and control by a set of pneumatic system, annotate fat hydro-cylinder (7) and be controlled by a set of hydraulic system.

7. A grease injecting machine for bearings according to claim 6, characterized in that: and a weight sensor (19) is also arranged on the guide rail sliding block (16).

8. A control system of a grease injection machine for a bearing is characterized in that: the system comprises a PLC (programmable logic controller) (20), a variable frequency driving module (21), a grease filling motor driving module (22), a guide rail motor driving module (23), a frequency converter (24), a grease filling motor driver (25), a guide rail motor driver (26), a weight sensor (19), a control button (27), an electromagnetic contactor, a touch screen (29) and a battery unit (28), wherein the PLC (20) is integrated with a PWR power module, a digital quantity signal input and output module, an ADC analog signal input and output module and a serial port communication module; the ADC analog input module is connected with the weight sensor (19) through a signal line, the digital input/output module is connected with the electromagnetic contactor and the control button (27) through signal lines respectively, the serial port communication module is in serial port communication with the HMI touch screen (29) through a serial port communication line and can receive instructions of the touch screen and feed back real-time data of the PLC (20), and the PLC (20) is connected with the variable frequency drive module (21), the grease filling motor drive module (22) and the guide rail motor drive module (23) through communication lines; the battery unit (28) supplies power to the PLC (programmable logic controller) 20, the variable frequency driving module (21), the grease filling motor driving module (25) and the guide rail motor driving module (26) through the PWR power module; the guide rail motor (17) is connected with the guide rail motor driver (26) through a signal line, the grease filling motor (30) is connected with the grease filling motor driver (25) through a signal line, and the grease homogenizing motor (13) is connected with the frequency converter (24) through a signal line.

9. The control system of a grease filling machine for bearings according to claim 8, characterized in that: frequency conversion drive module (21), fat filling motor drive module (22), guide rail motor drive module (23) all have IGBT rectification contravariant interface and PWM pulse output interface, frequency conversion drive module (21), fat filling motor drive module (22), guide rail motor drive module (23) all link to each other with the battery unit through respective IGBT rectification contravariant interface, frequency conversion drive module (21), fat filling motor drive module (22), guide rail motor drive module (23) all link to each other with the PWM pulse input interface of corresponding guide rail motor driver (26), fat filling motor driver (25) and converter (24) through respective PWM pulse output interface through the communication line.

10. A control method of a control system based on a grease injection machine for bearings is characterized in that: the method comprises the following steps:

step (1): after a control system is powered on, initializing, wherein in the initialization process, a PLC (programmable logic controller) is initialized, a touch screen (29) is initialized, a variable frequency driving module (21), a grease filling motor driving module (22), a guide rail motor driving module (23) is initialized, a grease filling motor (30) is initialized, whether a bearing stays at an initial station or not is detected, and the size of a gap of an inner ring of the bearing is detected;

step (2): reading a grease injection amount target expected by a bearing grease injection machine, and converting target data into specific grease injection weight;

and (3): and judging whether the target grease injection amount is reached after the grease injection of the bearing grease injection machine, if the target grease injection amount is not reached, immediately calling parameters in a programmable logic controller (20) to drive a grease injection oil cylinder (7) to work, so that the grease injection weight of the bearing is continuously changed until the target grease injection amount is reached.

Technical Field

The invention relates to a hub bearing lubricating grease adding technology, in particular to a grease injection machine for a bearing, a control system and a control method, and belongs to the technical field of bearing assembly.

Background

The bearing is a part for fixing and reducing load friction coefficient in the mechanical transmission process, a hub bearing unit is used as a special bearing for an automobile hub, a lubricating grease injection process is needed, two grease injection methods are always adopted in the bearing production for a long time, one is a structure for injecting grease at two ends of a bearing end cover, for example, a bearing grease injection machine (application number: CN 201510011539.1) in Chinese patent adopts the technology that the bearing grease injection machine comprises a frame, a grease injection cylinder, a grease injection disc and a grease delivery device, and the bearing grease injection machine can have the following problems when being used for a long time: the weight of the grease injected is not stable; the lubricating grease amount of a single set of bearings in a batch of bearings is not equal, if the grease injection amount is too much, the phenomenon of grease leakage of the bearings in rotation is easily caused, otherwise, if the grease injection amount is too little, the phenomenon of dry friction is easily caused when the bearings rotate, high temperature rise is caused during dynamic work, and the service life of the bearings is seriously influenced.

At present, a grease injection method for injecting lubricating grease into a gap between two inner rings of a hub bearing theoretically appears; for example, chinese utility model patent CN200620141399.6 discloses a hub bearing unit and a grease injection and equalization method thereof, which utilizes the gap between the small end faces of two inner rings after the bearing is assembled, the grease injection nozzle is opposite to the gap during grease injection, a grease outlet pipe injects grease into the bearing, and a mold on the grease injection system is utilized to clamp the outer ring of the bearing so as to make the outer ring rotate around the inner ring, thereby achieving the grease equalization effect, the method has the advantages that the grease injection average value of the inner ring gap is better, the grease distribution is more uniform, the disadvantages are that the gap of the inner ring of the hub bearing is difficult to be ensured due to the process precision problem, a gap may exist between the grease injection nozzle and the gap, thereby the grease is difficult to be completely injected into the inner ring gap in the actual production, the grease leakage phenomenon at the inner ring gap is easy to occur, in addition, the utility model only introduces the general hardware structure and the working principle of the grease injection, how to control the system is a difficult technical problem to solve.

Disclosure of Invention

The invention aims to provide a grease injection machine for a bearing, a control system and a control method, which have the advantages of high grease injection speed, uniformity and accuracy and adjustable grease injection quantity, thereby improving the grease injection quality of a hub bearing, saving grease and reducing cost.

In order to solve the technical problem, the grease injection machine for the hub bearing comprises a rack, a grease injection mechanism and a rotary grease homogenizing mechanism, wherein the grease injection mechanism is arranged on the rack and used for injecting grease into the bearing, the rotary grease homogenizing mechanism is used for homogenizing the grease into the bearing after grease injection, the grease injection mechanism can inject grease from the inner ring gap of the bearing to be injected with the grease, the rotary grease homogenizing mechanism can push the outer ring of the bearing to rotate and drive lubricating grease injected into the bearing to rotate together for homogenizing the grease, a bearing conveying mechanism is arranged on the rack and located below the grease injection mechanism and the rotary grease homogenizing mechanism, and the bearing conveying mechanism can move the bearing to be under the grease injection mechanism for grease injection operation or move to be under the grease homogenizing mechanism for homogenizing the grease.

Annotate fat mechanism and include the notes fat actuating cylinder that the frame top set up, connect the notes fat hydro-cylinder of annotating the piston rod bottom of annotating the fat actuating cylinder and connect the tubulose notes fat head on annotating the piston rod of fat hydro-cylinder, still including the notes fat bucket and the fat jar that fills that are located frame one side, the fat jar that fills is through filling fat delivery piping connection notes fat hydro-cylinder and can be carried to annotating fat hydro-cylinder department by filling the fat delivery pipe after with lubricating grease extrusion, and then annotates inside the fat head pours lubricating grease into the wheel bearing inner circle gap into by the tubulose.

The top of the grease filling cylinder is provided with a grease filling motor, and the grease filling motor is started to perform grease filling operation in the grease filling barrel.

Rotatory even fat mechanism includes the even fat actuating cylinder that the frame top set up, connects the even fat motor in the piston rod bottom of even fat actuating cylinder and connects the even fat fixed disk in even fat motor bottom, even fat fixed disk can promote bearing inner race rotary motion and drive the rotatory even fat in the lump of lubricating grease in the bearing.

The bearing conveying mechanism comprises a guide rail arranged on the rack, a guide rail sliding block arranged on the guide rail and a guide rail motor capable of driving the guide rail sliding block to reciprocate along the guide rail, a bearing fixing base used for arranging a bearing is fixedly arranged on the guide rail sliding block, and the guide rail motor can drive the guide rail sliding block to move so as to drive the bearing fixing base to move to a corresponding station along the guide rail.

The grease injection driving cylinder is a grease injection driving cylinder, the grease homogenizing driving cylinder is a grease homogenizing driving cylinder, the grease filling cylinder is a grease filling cylinder, the grease injection driving cylinder and the grease homogenizing driving cylinder are controlled by a set of pneumatic system, and the grease injection cylinder and the grease filling motor are controlled by a set of hydraulic system.

And a weight sensor is also arranged on the guide rail sliding block.

A control system of a grease injection machine for a bearing comprises a PLC (programmable logic controller), a variable frequency driving module, a grease filling motor driving module, a guide rail motor driving module, a frequency converter, a grease filling motor driver, a guide rail motor driver, a weight sensor, a control button, an electromagnetic contactor, a touch screen and a battery unit, wherein a PWR (Power line reactor) power module, a digital quantity signal input and output module, an ADC (analog to digital converter) analog signal input and output module and a serial port communication module are integrated on the PLC; the ADC analog input module is connected with the weight sensor through a signal line, the digital input/output module is connected with the electromagnetic contactor and the control button through signal lines respectively, the serial port communication module is in serial port communication with the HMI touch screen through a serial port communication line and can receive instructions of the touch screen and feed back real-time data of the PLC programmable controller, and the PLC programmable controller is connected with the variable frequency driving module, the grease filling motor driving module and the guide rail motor driving module through communication lines; the battery unit supplies power to the PLC programmable controller, the variable frequency driving module, the grease filling motor driving module and the guide rail motor driving module through the PWR power supply module; the guide rail motor is connected with the guide rail motor driver through a signal line, the grease filling motor is connected with the grease filling motor driver through a signal line, and the grease homogenizing motor is connected with the frequency converter through a signal line.

The frequency conversion driving module, the grease filling motor driving module and the guide rail motor driving module are all provided with IGBT rectification inversion interfaces and PWM pulse output interfaces, the frequency conversion driving module, the grease filling motor driving module and the guide rail motor driving module are all connected with the battery unit through respective IGBT rectification inversion interfaces, and the frequency conversion driving module, the grease filling motor driving module and the guide rail motor driving module are all connected with the PWM pulse input interfaces of the corresponding guide rail motor driver, the grease filling motor driver and the frequency converter through respective PWM pulse output interfaces through communication lines.

A control method of a control system based on a grease injection machine for bearings comprises the following steps:

step (1): after a control system is powered on, initializing, wherein in the initialization process, a PLC (programmable logic controller) is initialized, a touch screen is initialized, a variable frequency driving module, a grease filling motor driving module and a guide rail motor driving module are initialized, a grease filling motor is initialized, whether a bearing stays at an initial station or not is detected, and the size of a gap of an inner ring of the bearing is detected;

step (2): reading a grease injection amount target expected by a bearing grease injection machine, and converting target data into specific grease injection weight;

and (3): and judging whether the target grease injection amount is reached after the grease injection of the bearing grease injection machine, if not, immediately calling parameters in the PLC to drive the grease injection oil cylinder to work so that the grease injection weight of the bearing is continuously changed until the target grease injection amount is reached.

The invention has the advantages that:

1. the structure design of the grease filling machine can utilize the clearance of the inner ring of the bearing to fill grease, simultaneously, the grease homogenizing fixed disc drives the outer ring of the hub bearing to quickly level grease to fill grease, the automatic grease filling work of the bearing is realized, the working efficiency is obviously improved, the labor intensity is greatly reduced, the grease filling mode of the inner ring of the bearing is more sufficient, the grease filling amount can be adjusted in real time through the grease filling stepping motor and the grease filling oil cylinder, when the target grease filling amount is not consistent with the actually detected grease filling amount, the Siemens S7-200 PLC programmable controller corrects the output pulse of the controller through the PID self-setting adjustment algorithm, the rotating speed of the grease filling stepping motor is increased or reduced, the stroke of the grease filling oil cylinder is increased or reduced, the larger the working stroke of the grease filling oil cylinder is, otherwise, the grease filling amount is reduced, so that the grease filling weight of the hub bearing is adjusted in real time until the target grease filling amount is reached, the grease injection quantity in the bearing can meet the target requirement, the cleanliness of the surface of the bearing can be kept, and the grease injection requirement of hub bearings of various specifications can be met;

2. mechanical parts such as a rack, a weight sensor, a tubular grease injection head, a grease filling cylinder and a grease injection cylinder in the grease injection machine are mechanically connected in a bolt and nut mode, and the grease injection machine is convenient to connect, reliable to fix and convenient to install and detach.

3. The control part in the control system adopts a hardware control framework combining a variable frequency drive module, a grease filling motor drive module, a guide rail motor drive module, a frequency converter, a grease filling motor driver, a guide rail motor driver, a weight sensor and the like with a programmable controller, a PID (proportion integration differentiation) self-setting grease filling quantity adjusting algorithm is adopted in a software control program, the high precision and the high stability of PID control are combined with the rapidity and the small overshoot of a fuzzy self-setting algorithm, and finally the fine adjustment of the grease filling quantity is controlled and finished through the self-setting PID adjusting algorithm, so that the problem of large error of the grease filling quantity in the traditional manual estimation adjustment is avoided;

4. its overall mechanical structure and control system combine organically, supplement each other, not only structural design is ingenious, simple to operate, and degree of automation is high moreover, annotates the fat quick, even and accurate, and annotates the adjustable fat volume, can adapt to the notes fat requirement of the bearing of different types, improves the wheel hub bearing and annotates fat quality, practices thrift the grease, has reduced purchasing cost.

Drawings

FIG. 1 is a schematic perspective view of a grease injection machine for bearings according to the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a cross-sectional view showing the oil-filling fit state of the bearing fixing base and the tubular grease-filling head after the bearing is installed in the present invention;

FIG. 4 is a schematic diagram of a hydraulic system of the present invention;

FIG. 5 is a schematic diagram of the pneumatic system of the present invention;

FIG. 6 is a schematic diagram of a control system of the grease injection machine for bearings according to the present invention;

FIG. 7 is a flow chart of a control system of the grease filling machine for bearings according to the present invention.

Detailed Description

The grease injecting machine for bearing, the control system and the control method according to the present invention will be described in further detail with reference to the accompanying drawings and the embodiments.