A hob running-in test apparatus

Abstract

This invention belongs to the field of tunneling machine cutter performance testing, specifically providing a cutter running-in test device. The device includes a fixed base equipped with a clamp, a cutter mounting base mounted on the fixed base, and a cutter shaft fixing part for fixing the cutter shaft. A drive mounting base is provided on the fixed base, and a drive device is mounted on the drive mounting base. The drive device has an output shaft, and the output shaft is connected to a running-in test fixture that can rotate coaxially with the output shaft. The clamp is used to fasten and hold the cutter hub of the cutter. A force-bearing part is provided on the top end face of the clamp, and a force-applying part is provided on the running-in test fixture. During the running-in test, the drive device can drive the clamp to rotate the cutter hub through the running-in test fixture. Compared with the prior art, the size of the clamp and the running-in test fixture in this invention can be reduced, thereby reducing the range of motion of the drive components of the test equipment, making it suitable for use in production sites and reducing safety hazards.

Description

Technical Field

[0001] This invention belongs to the field of tunneling machine cutter performance testing, and in particular relates to a cutter break-in test device. Background Technology

[0002] For formations with high strength, tunnel boring machines (TBMs) typically equip their cutterheads with roller cutters. Before starting the TBM, a certain torque needs to be applied to the roller cutters to overcome the friction on their backs and the resistance of the surrounding medium for proper startup. The magnitude of the roller cutter starting torque directly affects the TBM's startup time and tunneling speed. If the starting torque is too low, the roller cutters will not operate properly, preventing the TBM from tunneling normally; if the starting torque is too high, it will lead to wear on the roller cutters and a shortened service life.

[0003] Before the hob is assembled and shipped, it is usually subjected to a running-in test to allow it to undergo a gentle "break-in" process and obtain a stable initial torque value.

[0004] Utility model patent CN204594685U discloses a vertical shield tunnel cutterhead running-in machine. The machine includes a base, a support frame and a clamp, a transmission box mounted on the upper end of the support frame, a motor mounted on the upper end of the transmission box, a reducer connected to the motor, and a rotating support frame connected to the reducer. The motor outputs power to drive the rotating support frame to rotate via the reducer. A lever is mounted on the rotating support frame. The running-in machine also features a clamping ring that can grip the cutter ring from the outer circumference of the cutterhead. A handle is provided on the outer circumference of the clamping ring. The clamp has holes of the same shape as the cutterhead shaft. During the running-in test, the cutterhead shaft is clamped onto the clamp, the clamping ring grips the cutter ring, the motor is started, and the rotating support rotates, causing the lever to rotate. The rotation of the lever pushes the handle to rotate the clamping ring, which in turn rotates the cutter ring.

[0005] Utility model patent CN215374483U discloses a cutterhead running-in device for a tunnel boring machine. This device includes a fixed base, a support arm fixed to the fixed base, a fixed arm fixed to the support arm, and a drive mechanism on the fixed arm. The output end of the drive mechanism is connected to a rocker arm. The device also includes a clamp with a rotating component on its outer wall, and a insertion hole for inserting one end of the rocker arm. The fixed base has a support component with a mounting groove for inserting the cutter shaft. During the cutterhead running-in test, the cutter shaft can be clamped onto the support component, the drive mechanism is activated, and the rocker arm rotates, pushing the clamp to rotate, thereby causing the cutter ring to rotate.

[0006] The running-in devices (machines) disclosed in the two patents mentioned above have similar structures and principles. Both involve fixing the cutter shaft vertically (with its axis extending vertically), using a clamp to hold the cutter ring of the hob, and employing a drive mechanism to drive the clamp and rotate the cutter ring, thus achieving the running-in of the hob. Regarding the structure for driving the clamp's rotation, both patents involve setting a radially extending fitting on the outer wall of the clamp, and configuring a rocker arm (rocker arm, lever, etc.) at the output end of the drive mechanism. The rocker arm pushes the fitting, thereby driving the clamp to rotate. However, in this type of running-in machine, during hob running-in tests, because the rotation center of the rocker arm does not coincide with its own axis, it can be understood that the rocker arm revolves around the hob's axis outside the hob, resulting in a large range of rotation for the rocker arm.

[0007] In practice, to enable timely running-in tests of hobs, the hob running-in test equipment could be located downstream of the hob production line. However, there are many workers at the hob production site, and the existing vertical running-in test equipment poses a significant safety hazard due to the large range of motion of the rocker arm during testing. Summary of the Invention

[0008] The purpose of this invention is to provide a cutter running-in test device to solve the technical problem that the large range of motion of the components driving the cutter rotation in the existing vertical running-in test device leads to higher safety hazards.

[0009] To achieve the above objectives, the technical solution of the hobbing cutter running-in test equipment provided by the present invention is as follows: A hob break-in test device includes a fixed base, on which a hob mounting base is mounted, and the hob mounting base is provided with a hob fixing part for fixing the cutter shaft; The fixed base is provided with a drive mounting base, and the drive mounting base is equipped with a drive device. The drive device has an output shaft with a vertically extending axis, and the output shaft is connected to a running-in test fixture that can rotate coaxially with the output shaft. The testing equipment is equipped with clamps, which are used to fasten and hold the cutter hub of the hob tightly; The top end face of the clamp is provided with a force-bearing part, and the running-in test fixture is provided with a force-applying part; During the running-in test, the force-bearing part is connected to the force-applying part so that the clamp can be driven to rotate the cutter hub through the running-in test fixture.

[0010] As a further improvement, the force-bearing part includes two protruding pillars on the top end face of the clamp, the two protruding pillars being radially symmetrical with respect to the clamp, and the force-applying part includes two insertion holes or slots on the running-in test fixture, the insertion holes or slots being able to allow the protruding pillars to be inserted accordingly, and the running-in test fixture is provided with a clearance groove for avoiding the cutter shaft.

[0011] As a further improvement, the force-bearing part includes two insertion holes or slots on the top end face of the clamp, the two insertion holes or slots being radially symmetrical with respect to the clamp, and the force-applying part includes two protrusions on the running-in test fixture, the insertion holes or slots being able to allow the protrusions to be inserted accordingly, and the running-in test fixture is provided with a clearance groove for avoiding the cutter shaft.

[0012] As a further improvement, the running-in test fixture is provided with an upper horizontal section, a ramp transition section and a lower horizontal section that extend continuously from the center to both sides. The ramp transition section is located on both sides of the clearance groove, and the corresponding protrusions, holes or slots of the force application part are located in the lower horizontal section.

[0013] As a further improvement, the slope transition section is equipped with weight reduction holes.

[0014] As a further improvement, a sensor bracket is mounted on the drive mounting base, and a torque sensor is mounted on the sensor bracket. The drive unit includes a power head, and couplings are connected to both ends of the torque sensor. One end of the coupling is connected to the power shaft of the power head, and the other end of the coupling is connected to the output shaft.

[0015] As a further improvement, the sensor bracket includes a base with a mounting groove on the base. The torque sensor is installed in the mounting groove, and tightening screws are installed on the two side walls of the mounting groove to fix the torque sensor by adjusting the tightening screws.

[0016] As a further improvement, two movable plates are installed in the mounting slot, each contacting the ends of the tightening screws on both side walls, so that the torque sensor can be pressed and fixed by adjusting the tightening screws to drive the movable plates to move. A rubber pad is installed on the side of the movable plate used to press the torque sensor.

[0017] As a further improvement, the running-in test fixture is connected to the output shaft via a detachable connection structure. The test equipment is also equipped with an end cover removal and assembly fixture. The end cover removal and assembly fixture is provided with an end cover removal and assembly part for anti-rotation connection with the end cover of the hob to drive the end cover to rotate. The end cover removal and assembly fixture is connected to the output shaft via a detachable installation structure, so that when removing and assembling the end cover, the running-in test fixture can be removed and replaced with the end cover removal and assembly fixture, and during the running-in test, the end cover removal and assembly fixture can be removed and replaced with the running-in test fixture.

[0018] As a further improvement, the fixed base is provided with a guide groove, and the hob mounting base is movably mounted on the fixed base. The hob mounting base has a test position and a loading position in its moving stroke, so that the running-in test can be completed at the test position and the hob can be loaded and installed at the loading position.

[0019] This invention is an improvement, and its beneficial effects are as follows: When using the hob running-in test equipment provided by this invention to conduct a running-in test on a hob, the hob to be tested can be installed on the hob mounting base, wherein the hob's cutter shaft can be fixed on the cutter shaft fixing part, preventing the cutter shaft from rotating during the running-in test. The output shaft of the drive device extends vertically, and its power can be output through the running-in test fixture and transmitted to the hob's cutter hub through the clamp, driving the hob's cutter hub to rotate.

[0020] Unlike existing technologies, in this invention, the clamp holds the hub of the hob. It's easy to understand that the radial dimension of the hub is smaller than the cutter ring, so the clamp size naturally doesn't need to be too large. Simultaneously, the force-bearing part of the clamp is located on the top end face of the clamp, rather than on one side of the outer circumference. This means that the distance between the force-bearing part and the rotation center of the cutter shaft can be effectively reduced compared to existing technologies. Correspondingly, the size of the running-in test fixture can also be reduced, thereby decreasing the range of motion of the drive components (running-in test fixture) of the test equipment, making it suitable for use in production environments and reducing safety hazards. Attached Figure Description

[0021] Figure 1 This is a perspective view (running-in test) of the hobbing cutter running-in test equipment of the present invention. Figure 2 This is a perspective view of an embodiment of the cutter running-in test equipment in this invention (end cover disassembly and assembly). Figure 3 This is a partial enlarged view of the implementation of the hobbing cutter running-in test equipment in this invention during the running-in test; Figure 4 This is a partial enlarged view of the implementation of the cutter running-in test equipment in this invention during the disassembly and assembly of the cutter end cover; Figure 5 This is a perspective view of the fixed base and the cutter mounting base of the cutter running-in test equipment embodiment of the present invention; Figure 6 for Figure 1 Axonometric view of the hob mounting base; Figure 7 for Figure 1 Front view of the hob mounting base; Figure 8 for Figure 1 Side view of the hob mounting base; Figure 9 for Figure 3 Schematic diagram of the connection relationship between the running-in test fixture and the output shaft; Figure 10 for Figure 4 Schematic diagram of the connection relationship between the middle end cover disassembly / assembly tool and the output shaft; Figure 11 for Figure 3 A three-dimensional view of the central clamp; Figure 12 for Figure 2 3D view of the bearing housing; Figure 13 for Figure 2 A sectional view of the bearing housing; Figure 14 for Figure 2 A 3D view of the sensor bracket; Figure 15 for Figure 2 Cross-sectional view of the sensor bracket; Figure 16 for Figure 1 A three-dimensional view of the middle limiting component; Figure 17 for Figure 1 Front view of the middle limit component.

[0022] Explanation of reference numerals in the attached figures: 1. Fixed base; 2. Hob mounting base; 3. Display module; 4. Stand; 5. Housing; 6. Clamp; 7. Idler roller; 8. Guide groove; 9. Drive mounting base; 10. Power head; 11. Coupling; 12. Torque sensor; 13. End cover disassembly and assembly fixture; 14. Bearing housing; 15. Sensor bracket; 16. Output shaft; 17. Running-in test fixture; 18. Limiting component; 19. Positioning hole; 100. Hob; 201. Cutter shaft fixing part; 202. Handle; 203. Lower protrusion; 204. Guide part; 601. Protrusion; 602. Left half 603. Right half clamp; 604. Handwheel; 605. Fixing pin; 606. Connecting screw; 1301. Pin hole; 1401. Housing; 1402. Bearing cover; 1403. Rolling bearing; 1501. Base; 1502. Tightening screw; 1503. Movable plate; 1504. Rubber pad; 1505. Fixing plate; 1701. Clearance groove; 1702. Slot; 1703. Upper horizontal section; 1704. Sloping transition section; 1705. Lower horizontal section; 1706. Weight reduction hole; 1801. Limiting plate; 1802. Square column. Detailed Implementation

[0023] To provide a hob break-in test device with a smaller range of motion and higher safety, the general idea of ​​this invention is to control the range of motion of the drive component that rotates the hob's cutter ring within the diameter of the hob. Specifically, a clamp is used to hold the hob's hub, and the movement of the cutter ring is achieved by driving the hub, thereby reducing the size of the clamp. Simultaneously, a force-receiving part that connects to and transmits power to the drive component is arranged on the top end face of the clamp. Correspondingly, the drive component is connected to the clamp from its top, which also allows for better control of the drive component's size, and thus, its range of motion.

[0024] Based on the above concept, the present invention will be further described in detail below in conjunction with the embodiments.

[0025] The hob running-in test equipment provided in this embodiment is as shown in Figure 1 and Figure 2 , and includes a fixed seat 1. The fixed seat 1 serves as the fixed foundation of the test equipment and can be stably placed at the production test site. Specifically, the fixed seat 1 can be welded or bolted by square tubes. A hob mounting seat 2 is assembled on the fixed seat 1. During the running-in test, the hob 100 can be installed on the hob mounting seat 2, and the axis of the tool shaft extends vertically and is fixed on the hob mounting seat 2. Correspondingly, a tool shaft fixing portion 201 for fixing the tool shaft is provided on the hob mounting seat 2, that is, this component or this part is used to fix the tool shaft of the hob 100. Specifically, the tool shaft fixing portion 201 can be configured with mounting holes adapted to the shape of the tool shaft of the hob 100, and the tool shaft can be inserted into the mounting holes to achieve anti-rotation fixation. More specifically, the tool shaft fixing portion 201 can be a separate component assembled on the hob mounting seat 2, or can be an integral structure with the hob mounting seat 2. For example, fixing holes can be directly opened on the hob mounting seat 2.

[0026] As a test equipment capable of performing a running-in test on the hob 100, naturally, it is configured with a driving device to drive the cutter ring of the hob 100 to rotate. It should be noted here that the hob 100 referred to here is an existing conventional hob 100, including a tool shaft, bearings, a tool hub, an upper end cover, a lower end cover, a cutter ring, etc. Those skilled in the art are familiar with the structure of this hob 100.

[0027] Correspondingly, in order to be able to configure the driving device, a driving mounting seat 9 is provided on the fixed seat 1, and the driving device is installed on the driving mounting seat 9. Specifically, since the installation position of the driving device is relatively high, a vertical frame 4 for installing the driving mounting seat 9 can be provided on the fixed seat 1. The driving mounting seat 9 can specifically be the "U-shaped" structure shown in Figure 2 , and of course, other forms are not excluded, such as a frame structure, as long as it can achieve the fixation of the driving device.

[0028] The driving device can output rotational power and has an output shaft 16 extending vertically in the axial direction. This part of the power should be able to be transmitted to the hob 100. Therefore, as shown in Figure 3 and Figure 9 , the test equipment is configured with a running-in test tooling 17. The running-in test tooling 17 can be non-rotatably connected to the output shaft 16 and can rotate coaxially with the output shaft 16. During the running-in test of the hob 100, the output shaft 16 and the running-in test tooling 17 as a whole constitute the component for driving the hob 100 to rotate. Reducing the rotation range of this part is the key for the test equipment to safely operate on the hob 100 production line.

[0029] The testing equipment is also equipped with clamps 6, such as Figure 1 , Figure 3 and Figure 11 As shown, the clamp 6 can be opened and closed. When the clamp 6 is closed, it can hold the hub of the hob 100 tightly, which is equivalent to a non-rotating connection with the hub.

[0030] The rotational power of the running-in test fixture 17 can be transmitted to the hub of the hob 100 via the clamp 6, causing the cutter ring to rotate synchronously (the hub and cutter ring are fixed). The running-in test fixture 17, as the driving component, has a force-applying part, which refers to the part, component, or location that applies force. The clamp 6, as the driven component, has a force-bearing part, which refers to the part, component, or location that can withstand the transmitted force or torque. The force-bearing part is located on the top end face of the clamp 6.

[0031] During the running-in test of the hob 100, the force-applying part and the force-receiving part are connected, and the running-in test fixture 17 can drive the clamp 6 to rotate, thereby causing the cutter hub to rotate.

[0032] Unlike existing technologies, this embodiment, also a vertical testing device, performs a running-in test on the hob 100. The clamp 6 holds and fixes the hob hub, whose diameter is smaller than the cutter ring diameter, thus reducing the radial dimension of the clamp 6. Furthermore, the force-bearing portion of the clamp 6 is located at its end, not radially outward. This allows the running-in test fixture 17 to form an end-to-end connection with the clamp 6 during the running-in test, naturally reducing the need for a large size. In practice, when used at the applicant's hob 100 production site, the rotation range of the running-in test fixture 17 is actually smaller than the cutter ring range of the hob 100, significantly improving on-site safety.

[0033] In some preferred embodiments, such as Figure 9 and Figure 11 As shown, the force-bearing part on the clamp 6 includes two protruding columnar structures, referred to as protruding columns 601, located on the top end face of the clamp 6. The two protruding columns 601 are radially symmetrical with respect to the clamp 6. In other words, the two protruding columns 601 are arranged at a 180° interval. The force-applying part on the running-in test fixture 17 includes two slots 1702, into which the protruding columns 601 can be inserted. That is to say, during the running-in test, the running-in test fixture 17 can be connected to the top of the clamp 6, and both the running-in test fixture 17 and the clamp 6 can have two balanced forces in the circumferential direction when rotating, resulting in better dynamic balance.

[0034] To avoid interference between the running-in test fixture 17 and the top of the cutter shaft of the hob 100 during the running-in test, a clearance groove 1701 is also provided on the running-in test fixture 17, such as... Figure 3 and Figure 9 As shown, the cutter shaft of the hob 100 can enter the clearance groove 1701.

[0035] It is easy to understand that slot 1702 refers to a slot that is not closed in the circumferential direction. In some implementations, slot 1702 can be replaced by a socket that is closed in the circumferential direction.

[0036] Based on the understanding of the aforementioned slot 1702 and protrusion 601 structure, those skilled in the art will understand that the positions of protrusion 601 and slot 1702 can be interchanged. That is, protrusion 601 can be placed on the running-in test fixture 17 as a force-applying part, and slot 1702 can be placed on the clamp 6 as a force-receiving part. The number and position of protrusion 601 and slot 1702 can remain the same as described above, and will not be elaborated further. In this case, clearance groove 1701 can also be provided on the running-in test fixture 17.

[0037] Regardless of whether the running-in test fixture 17 is equipped with a slot 1702, a socket, or a protrusion 601, in a more preferred embodiment, such as Figure 9 As shown, the running-in test fixture 17 has continuously extending upper horizontal section 1703, ramp transition section 1704, and lower horizontal section 1705 extending from the center (rotation center) to both sides. The ramp transition section 1704 is located on both sides of the clearance groove 1701, while the corresponding slots 1702, holes, or protrusions 601 of the force application part are located on the lower horizontal section 1705. In this case, the running-in test fixture 17 is an equivalent trapezoidal structure, and its top end is narrowed through the transition section, which can reduce the axial space covered when the running-in test fixture 17 rotates.

[0038] Furthermore, a weight-reducing hole 1706 is provided in the ramp transition section 1704 of the running-in test fixture 17 to reduce the weight of the running-in test fixture 17 and facilitate on-site disassembly and assembly. It also improves the torsional strength of the running-in test fixture 17. The weight-reducing hole 1706 is preferably a triangular structure as shown in the figure.

[0039] As a specific embodiment of the clamp 6, such as Figure 11As shown, the clamp 6 includes a left clamp 602 and a right clamp 603. One end of the left clamp 602 and the right clamp 603 are hinged, and the other end is equipped with a locking structure that can be connected to each other to fasten the clamp 6. After the left clamp 602 and the right clamp 603 are fastened together, they can form a circular structure. The inner circumferential surface of this structure can fit against the hub of the hob 100. Specifically, the locking structure includes a fixing pin 605 fixed to one end of the left clamp 602. The fixing pin 605 can be fixed with a cotter pin. The fixing pin 605 has a through hole through which a connecting screw 606 can pass. The end of the connecting screw 606 with external threads passes through the fixing pin 605 and one end of the right clamp 603, and is connected to a handwheel 604. The handwheel 604 has a threaded hole. Manually turning the handwheel 604 can lock and fix the left clamp 602 and the right clamp 603.

[0040] Of course, the clamp 6 can also take other forms. For example, the left half clamp 602 and the right half clamp 603 can be separate structures. When in use, both ends of the left half clamp 602 and the right half clamp 603 can be fixed by a locking structure.

[0041] To accurately measure the starting torque of the hob 100, preferably, a torque sensor 12 is configured on the drive unit. Specifically, as shown in... Figure 2 , Figure 14 and Figure 15 As shown, a sensor bracket 15 is mounted on the drive mounting base 9, and a torque sensor 12 is mounted on the sensor bracket 15. The torque sensor 12 can be directly purchased from the market. The drive device includes a power head 10, which can be an electric motor or a hydraulic motor. Couplings 11 are connected to both ends of the torque sensor 12. One end (upper end) of the coupling 11 is connected to the power shaft of the power head 10, and the other end (lower end) of the coupling 11 is connected to the output shaft 16. These connections are all anti-rotation connections, such as keyed connections or splined connections.

[0042] By configuring the torque sensor 12, the testing equipment can accurately measure the torque of the hob 100 under the current test, eliminating the need for manual torque testing, which is convenient and efficient.

[0043] like Figure 1 As shown, the testing equipment is also equipped with a housing 5 covering the drive unit. The housing 5 can be fixed to the stand 4. In order to enable the operator to directly obtain the torque result of the hob 100 on the current equipment, a display module 3 is provided on the housing 5. The display module 3 is communicatively connected to the torque sensor 12. The communication connection can be wired or wireless, and the communication protocol can be consistent with the existing technology.

[0044] Sensor bracket 15 is as follows Figure 14 and Figure 15As shown, the system includes a base 1501, which serves as the fixing foundation for the sensor bracket 15 and can be fixedly connected to the drive mounting base 9, such as by bolting or welding. The base 1501 has mounting grooves, specifically the upward-opening recesses shown in the figure. The torque sensor 12 can be installed in the mounting groove. To secure the torque sensor 12, tightening screws 1502 (set screws) are installed on the two side walls of the mounting groove. The torque sensor 12 can be pressed and fixed by tightening the tightening screws 1502. Specifically, four tightening screws 1502 can be provided, two on each side wall of the groove.

[0045] The upper and lower ends of the torque sensor 12, which is fixed in this way, will not be blocked by the mounting slot, making it convenient for the torque sensor 12 to be connected to the coupling 11.

[0046] To improve the fixing reliability of the torque sensor 12 and prevent the tightening screw 1502 from damaging the torque sensor 12, in a more preferred embodiment, two movable plates 1503 are installed in the mounting slot. The two movable plates 1503 respectively contact the ends of the tightening screws 1502 on the side walls of the slot. Tightening the tightening screws 1502 on the side walls of the slot can push the movable plates 1503 to move, so that the movable plates 1503 press against the torque sensor 12 as a whole. Compared with the solution of only using the ends of the tightening screws 1502 to abut against the torque sensor 12, it is obvious that using the movable plates 1503 to press against the torque sensor 12 as a whole can improve the fixing reliability of the torque sensor 12.

[0047] A rubber pad 1504 is installed on the side of the movable plate 1503 used to press the torque sensor 12. The rubber pad 1504 can buffer and increase the friction, which can protect the torque sensor 12 and improve the fixing reliability of the torque sensor 12.

[0048] In addition, a fixing plate 1505 is provided at the bottom of the mounting slot between the two movable plates 1503. The fixing plate 1505 can limit the limit stroke of the movable plate 1503 and prevent the torque sensor 12 from being crushed when adjusting the tightening screw 1502.

[0049] It should be added that the above-mentioned sensor bracket 15 configuration is only a preferred method. In fact, other methods can also be used as sensor bracket 15 to fix torque sensor 12. For example, clamp structure, sleeve structure, etc. can be used to fit around torque sensor 12, and then can be fixed to drive mounting base 9 by cantilever beam.

[0050] To facilitate on-site personnel in operating and using the testing equipment, in the preferred embodiment, such as Figure 1 , Figure 2 , Figures 5-8As shown, the hob mounting base 2 is movably mounted on the fixed base 1. Specifically, the fixed base 1 is provided with a guide groove 8, and the hob mounting base 2 can be guided and moved along the guide groove 8. In this case, the hob mounting base 2 is equivalent to a movable platform. Thus, when testing the hob 100, the hob mounting base 2 can be moved from below the drive device to a position convenient for installing the hob 100. After installing the hob 100, the hob mounting base 2 can be retracted back below the drive device. In other words, the hob mounting base 2 has a test position and a loading position in its travel stroke. The test position corresponds to... Figure 3 The test position is located roughly below the drive unit, where the break-in test can be completed. The loading position is located to one side of the test position, away from the drive unit. This position makes it convenient and safe to install or remove the tested hob 100.

[0051] Specifically, such as Figures 5-8 As shown, a lower protrusion 203 is provided at the lower end of the hob mounting base 2. The lower protrusion 203 can be understood as a block-shaped structure that protrudes downward from the top plate of the hob mounting base 2 to be embedded in the guide groove 8. Guide portions 204 are formed on both sides of the lower protrusion 203 and in the area below the hob mounting base 2 so that the hob mounting base 2 can be properly installed in the guide groove 8.

[0052] More preferably, the fixed base 1 is also equipped with a limiting member 18, which is used to restrict the hob mounting base 2 to the test position, so as to ensure that the hob mounting base 2 can be stably located in the test position during the running-in test of the hob 100, thereby ensuring the stability of the hob 100. Figure 1 , Figure 2 , Figure 5 , Figure 16 and Figure 17 As shown, the limiting member 18 includes a limiting plate 1801 and a square post 1802 located below the limiting plate 1801. Correspondingly, a positioning hole 19 with an upward opening is provided on the fixing base 1. If the fixing base 1 is composed of multiple square tubes spliced ​​together, the positioning hole 19 can be directly formed by square tubes. The square post 1802 can be adapted to be inserted into the positioning hole 19. When it is necessary to move the hob mounting base 2, the limiting member 18 can be taken out upward to release the stop and limit on the hob mounting base 2, so that the hob mounting base 2 can be moved from the test position to the loading position. When performing a running-in test on the hob, or when screwing on the hob end cap, the limiting member 18 is installed, and the square post 1802 is inserted into the positioning hole 19.

[0053] To reduce the frictional force in guiding the movement of the hob mounting base 2, a roller 7 located in the guide groove 8 is provided on the fixed base 1. The roller 7 can provide rolling support for the hob mounting base 2.

[0054] In addition, a handle 202 is provided on the hob mounting base 2 to facilitate the operation and movement of the hob mounting base 2 by the staff.

[0055] To improve the stability of the output shaft 16's movement, a bearing housing 14 is also installed on the drive mounting base 9, such as... Figures 2-4 , Figure 12 and Figure 13 As shown, the bearing housing 14 is fitted over the output shaft 16. Specifically, the bearing housing 14 includes a housing 1401, in which a rolling bearing 1403 is installed, and bearing covers 1402 that seal both ends of the rolling bearing 1403 are also installed on the housing 1401.

[0056] When assembling or disassembling the hob 100, the end cap of the hob 100 needs to be installed on or removed from the cutter shaft. The cutter shaft has external threads, and the end cap has threaded holes. Generally, the installation and removal of the end cap of the hob 100 is done manually.

[0057] Considering that the cutter break-in test equipment can be configured on the cutter 100 production line, it is innovative to use the test equipment to screw and disassemble the end caps of the cutter 100, so as to achieve "one machine for multiple uses" while reducing the labor intensity of workers when disassembling and assembling the end caps.

[0058] Specifically, such as Figure 2 , Figure 4 and Figure 10 As shown, the hob break-in test equipment is also equipped with an end cap disassembly and assembly fixture 13. The end cap disassembly and assembly fixture 13 is provided with an end cap disassembly and assembly part for anti-rotation connection with the end cap of the hob 100. The end cap disassembly and assembly part can drive the end cap to rotate, so that the end cap can be rotated while the cutter shaft of the hob 100 is fixed, thereby tightening or loosening the end cap to ensure the locking effect of the end cap and reduce the labor intensity of the workers.

[0059] When disassembling or assembling the end cover, the end cover disassembly / assembly fixture 13 can also be connected to the output shaft 16 of the drive unit. For this purpose, the running-in test fixture 17 is connected to the output shaft 16 via a detachable connection structure, and the end cover disassembly / assembly fixture 13 is connected to the output shaft 16 via a detachable mounting structure. In this way, when it is necessary to disassemble or assemble the end cover, the running-in test fixture 17 can be removed and the end cover disassembly / assembly fixture 13 can be installed in place. When it is necessary to perform a running-in test on the hob 100, the end cover disassembly / assembly fixture 13 can be removed and the running-in test fixture 17 can be installed in place.

[0060] It should be added that when installing the end cap, the operator can first screw the end cap onto the cutter shaft until it is difficult to screw it on manually (this process does not require much force), then install the hob 100 on the hob mounting base 2, and use the drive device to tighten the end cap. If the drive device is equipped with a torque sensor 12, the preload torque of the end cap can be accurately measured at this time. When removing the end cap, the hob 100 can be installed on the hob mounting base 2 first, and the end cap can be loosened using the drive device. Then, the end cap can be removed manually (this process does not require much force).

[0061] Specifically, such as Figure 10 As shown, the end cap assembly / disassembly part can be provided with a pin hole 1301, into which a pin can be inserted. When assembling or disassembling the end cap, the pin can be inserted into the assembly / disassembly hole on the end cap to drive the end cap to rotate. Alternatively, the pin 605 can be directly fixed on the end cap assembly / disassembly fixture 13, and the pin can be inserted into the assembly / disassembly hole on the end cap during use.

[0062] Regarding the aforementioned detachable connection structure and detachable installation structure, their structures can be identical. For example, insertion holes can be provided in the running-in test fixture 17 and the end cap disassembly fixture 13, allowing the output shaft 16 to be inserted into the insertion holes. A coaxial pin insertion hole can be provided in the output shaft 16 and the insertion hole. After the output shaft 16 is inserted into the insertion hole, a pin can be inserted to achieve an anti-rotation connection between the output shaft 16 and the running-in test fixture 17 / end cap disassembly fixture 13. After use, the pin can be pulled out. However, it should be noted that in other embodiments, the detachable connection structure and detachable installation structure can, of course, adopt other methods, as long as they can achieve an anti-rotation connection between the corresponding fixture and the output shaft 16, while also allowing for easy disassembly.

[0063] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hob break-in test device, the test device comprising a fixed base, a hob mounting base mounted on the fixed base, and a hob mounting base having a hob fixing part for fixing the cutter shaft; characterized in that The fixed base is provided with a drive mounting base, and the drive mounting base is equipped with a drive device. The drive device has an output shaft with a vertically extending axis, and the output shaft is connected to a running-in test fixture that can rotate coaxially with the output shaft. The testing equipment is equipped with clamps, which are used to fasten and hold the cutter hub of the hob. The top end face of the clamp is provided with a force-bearing part, and the running-in test fixture is provided with a force-applying part; During the running-in test, the force-bearing part is connected to the force-applying part so that the clamp can be driven to rotate the cutter hub through the running-in test fixture.

2. The gage test apparatus of claim 1 wherein, The force-bearing part includes two protruding pillars on the top end face of the clamp, the two protruding pillars are radially symmetrical with respect to the clamp. The force-applying part includes two insertion holes or slots on the running-in test fixture, the insertion holes or slots can be used to insert the protruding pillars accordingly, and the running-in test fixture is provided with a clearance groove to avoid the cutter shaft.

3. The gage test apparatus of claim 1 wherein, The force-bearing part includes two insertion holes or slots on the top end face of the clamp, the two insertion holes or slots are radially symmetrical with respect to the clamp. The force-applying part includes two protrusions on the running-in test fixture, the insertion holes or slots can be used to insert the protrusions accordingly, and the running-in test fixture is provided with a clearance groove to avoid the cutter shaft.

4. A roll-off test apparatus according to claim 2 or 3, characterised in that The running-in test fixture has an upper horizontal section, a ramp transition section and a lower horizontal section that extend continuously from the center to both sides. The ramp transition section is located on both sides of the clearance groove, and the corresponding protrusions, holes or slots of the force application part are located in the lower horizontal section.

5. The gage test apparatus of claim 4 wherein, The slope transition section is equipped with weight reduction holes.

6. The roll-off test apparatus of claim 1 wherein, A sensor bracket is mounted on the drive mounting base, and a torque sensor is mounted on the sensor bracket. The drive device includes a power head, and couplings are connected to both ends of the torque sensor. One end of the coupling is connected to the power shaft of the power head, and the other end of the coupling is connected to the output shaft.

7. The gage test apparatus of claim 6 wherein, The sensor bracket includes a base with a mounting groove. The torque sensor is installed in the mounting groove, and tightening screws are installed on the two side walls of the mounting groove to fix the torque sensor by adjusting the tightening screws.

8. The gage test apparatus of claim 7 wherein, Two movable plates are installed in the mounting slot, each contacting the ends of the tightening screws on the side walls. The torque sensor is pressed and fixed by adjusting the tightening screws to drive the movable plates to move. A rubber pad is installed on the side of the movable plate used to press the torque sensor.

9. The roll-off test apparatus of any of claims 1-3, 6-8, wherein, The running-in test fixture is connected to the output shaft via a detachable connection structure. The test equipment is also equipped with an end cover removal and assembly fixture. The end cover removal and assembly fixture is provided with an end cover removal and assembly part for anti-rotation connection with the end cover of the hob to drive the end cover to rotate. The end cover removal and assembly fixture is connected to the output shaft via a detachable installation structure so that when removing and assembling the end cover, the running-in test fixture can be removed and replaced with the end cover removal and assembly fixture. During the running-in test, the end cover removal and assembly fixture can be removed and replaced with the running-in test fixture.

10. The roll-off test apparatus of any of claims 1-3, 6-8, wherein, The fixed base is provided with a guide groove, and the hob mounting base is movably mounted on the fixed base. The hob mounting base has a test position and a loading position in its moving stroke, so that the running-in test can be completed at the test position and the hob can be loaded and installed at the loading position.

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