Quick release type locking structure between main shaft and speed reducer in chain grate

Abstract

The utility model discloses a quick release type locking structure between a main shaft and a speed reducer in a chain grate machine, which comprises the main shaft and the speed reducer, a shaft hub is arranged in the speed reducer, one end of the shaft hub extends out of the speed reducer, an annular groove is arranged on the shaft hub extending out of the speed reducer, one end of the main shaft extends into the shaft hub, a locking disc is clamped in the annular groove, and the locking disc is connected with the main shaft. The locking disc comprises a front limiting ring, a rear limiting ring and a section inner ring, the front limiting ring and the rear limiting ring are connected through an adjusting bolt, a front conical surface and a rear conical surface are arranged on the front side and the rear side of the section inner ring respectively, the section inner ring is clamped in the front limiting ring and the rear limiting ring, the section inner ring is arranged on an annular groove of the shaft hub in a sleeved mode, and the adjusting bolt is screwed tightly. The front limiting ring and the rear limiting ring exert pressing force on the section inner ring, and the section inner ring is tightly hooped on the annular groove of the shaft hub so as to be tightly hooped on the main shaft. The utility model has the advantages that the main shaft and the shaft hub are convenient to disassemble and assemble, and the locking force between the shaft hub and the main shaft can be ensured through the locking disc.

Description

Technical Field

[0001] This utility model relates to a chain grate machine, and more particularly to a quick-release locking structure between the main shaft and the reducer in a chain grate machine. Background Technology

[0002] A chain grate machine is a device that uses the waste heat from an annular cooler and the hot airflow discharged from a rotary kiln to dry and preheat green pellets before feeding them into the rotary kiln for calcination. The transmission of the chain grate machine mainly consists of a main shaft and a reducer. Both ends of the main shaft are connected to a reducer. Currently, the locking structure between the main shaft and the reducer is as follows: Figure 1 As shown, the hub of the reducer is built into the reducer, and the main shaft extends into the hub. An annular gap exists between the main shaft and the hub, within which an expansion sleeve is installed. This expansion sleeve, through the compression and expansion of high-strength bolts, generates a significant clamping force between the hub and the main shaft. When the reducer drives the hub to rotate, the rotating hub drives the main shaft to rotate along with it via the expansion sleeve. During maintenance of the reducer or main shaft, the expansion sleeve may jam due to corrosion or deformation between it and the main shaft or hub. Since the expansion sleeve is installed inside the hub, disassembly is very inconvenient, thus prolonging maintenance time. As the core transmission component of the entire chain grate machine, if a problem with the main shaft is not resolved promptly, the entire equipment will stop operating, affecting production efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a quick-release locking structure between the main shaft and the reducer in a chain grate machine, which enables quick disassembly and assembly between the main shaft and the hub in the reducer, thus facilitating maintenance.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a quick-release locking structure between the main shaft and the reducer in a chain grate machine, comprising: a main shaft and a reducer, a hub provided in the reducer, one end of the hub extending outward from the reducer, an annular groove formed on the outer side wall of the hub extending outward from the reducer, one end of the main shaft extending into the corresponding hub in the reducer, a locking disc being engaged in the annular groove, the locking disc comprising: a front limiting ring, a rear limiting ring, and a cross-sectional inner ring, with several through holes evenly distributed around the circumference of the front limiting ring, and a locking disc being engaged in the cross-sectional inner ring. The limiting ring has threaded through holes evenly distributed around its circumference, the same number as the through holes. A front conical surface and a rear conical surface are respectively provided on the front and rear sides of the inner ring. An adjusting bolt is movably inserted in the through hole of the front limiting ring. The adjusting bolt is threadedly connected to the threaded through hole of the rear limiting ring. The inner ring is locked in the front and rear limiting rings. The inner ring is fitted onto the annular groove of the shaft hub. When the adjusting bolt is tightened, the front and rear limiting rings apply a clamping force to the inner ring. The inner ring is clamped onto the annular groove of the shaft hub. After being clamped, the shaft hub narrows and clamps onto the main shaft.

[0005] Furthermore, in the aforementioned chain grate machine, the quick-release locking structure between the main shaft and the reducer includes a first conical hole in the front limiting ring, the conical surface of which is inclined from front to back and from bottom to top; and a second conical hole in the rear limiting ring, the conical surface of which is inclined from front to back and from top to bottom. The front conical surface of the inner ring of the cross section wedges into the first conical hole of the front limiting ring, and the rear conical surface of the inner ring of the cross section wedges into the second conical hole of the rear limiting ring.

[0006] Furthermore, in the aforementioned chain grate machine, the quick-release locking structure between the main shaft and the reducer has the same taper in the first conical hole, the second conical hole, the front conical surface, and the rear conical surface.

[0007] Furthermore, in the aforementioned chain grate machine, the quick-release locking structure between the main shaft and the reducer includes a buffer washer sandwiched between the front limit ring and the rear limit ring.

[0008] Furthermore, in the aforementioned chain grate machine, the quick-release locking structure between the main shaft and the reducer has a groove bottom thickness that is 0.35 to 0.4 times the shaft hub wall thickness.

[0009] Furthermore, in the aforementioned chain grate machine, the quick-release locking structure between the main shaft and the reducer includes a weight-reducing balance hole along the axis of the main shaft, and a circular baffle at each end of the main shaft. The circular baffle is abutted against the end of the main shaft by connecting bolts, the axis of the circular baffle coincides with the axis of the main shaft, and the circular baffle abuts against the shaft hub.

[0010] Furthermore, in the aforementioned chain grate machine, there is a quick-release locking structure between the main shaft and the reducer, wherein the reducer is a three-ring reducer.

[0011] The advantages of this utility model are as follows: the built-in shaft hub in the original reducer is replaced with an extended shaft hub that extends out of the reducer. A locking disc is then installed on the extended shaft hub, which clamps the shaft hub and the main shaft. Since the locking disc is located outside the reducer, and the shaft hub and the main shaft can be locked or unlocked simply by removing and installing the locking disc, disassembly and assembly are very convenient, facilitating later maintenance and greatly reducing maintenance time. The locking disc uses a front limit ring and a rear limit ring to squeeze the front and rear conical surfaces of the inner ring of the cross section, respectively, so that the front and rear sides of the inner ring of the cross section simultaneously apply clamping force to the shaft hub, enabling the locking disc to provide a more stable and wider locking range between the shaft hub and the main shaft. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the connection structure between the main shaft and the reducer in an existing chain grate machine.

[0013] Figure 2This utility model describes a quick-release locking structure between the main shaft and the reducer in a chain grate machine.

[0014] Figure 3 yes Figure 2 A schematic diagram of the structure of the inner ring of the interrupted surface from the side view. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figure 2 , Figure 3As shown, the quick-release locking structure between the main shaft and the reducer in the chain grate machine of this utility model includes: a main shaft 1 and a reducer 2. A weight-reducing balance hole 11 is provided along the axis of the main shaft 1. This reduces the weight of the main shaft 1 and lowers energy consumption without affecting its strength and rigidity, while also adjusting its balance to achieve better dynamic equilibrium during rotation. A circular baffle 12 is provided at each end of the main shaft 1, and the circular baffle 12 is abutted against and attached to the end of the main shaft 1 by connecting bolts to prevent external dust. Entering the weight reduction and balancing hole 11, the axis of the circular baffle 12 coincides with the axis of the main shaft 1. In this embodiment, the reducer 2 is a three-ring reducer. The three-ring reducer can maintain good operating conditions in complex working environments and has a high load-bearing capacity, and can operate stably under heavy load conditions. A hub 21 is provided in the reducer 2. One end of the hub 21 extends outward from the reducer 2. An annular groove is opened on the outer wall of the hub 21 extending out of the reducer 2. The bottom thickness of the groove between the annular groove and the inner wall of the hub 21 is 0.35 to 0.5 times the thickness of the hub wall.Four times, one end of the main shaft 1 extends into the hub 21 of the reducer 2 on the corresponding side. The circular baffle 12 on the main shaft 1 abuts against the hub 21. A locking disc 3 is engaged in the annular groove. The locking disc 3 includes: a front limiting ring 31, a rear limiting ring 32, and a cross-sectional inner ring 33. Several through holes are evenly distributed around the circumference of the front limiting ring 31. A first conical hole is provided in the front limiting ring 31. The conical surface of the first conical hole is inclined from front to back and from bottom to top. The same number of threaded through holes as the number of through holes are evenly distributed around the circumference of the rear limiting ring 32. A second conical hole is provided in the rear limiting ring 32. The conical surface of the second conical hole is inclined from front to back and from top to bottom. The taper of the second conical hole is the same as the taper of the first conical hole. The front limiting ring 31 and the rear limiting ring 32 are connected by an adjusting bolt 34. The adjusting bolt 34 passes through the through hole and extends into a threaded through hole aligned with the through hole, and is threadedly connected to the threaded through hole. A buffer washer 35 is clamped between the front limiting ring 31 and the rear limiting ring 32. The cross-sectional inner ring 33 is fitted between the first conical hole and the second conical hole. A front conical surface and a rear conical surface are respectively provided on the front and rear sides of the cross-sectional inner ring 33. The front conical surface and the rear conical surface have the same taper and the same taper as the first conical hole and the second conical hole. The front conical surface and the rear conical surface of the cross-sectional inner ring 33 are wedged into the first conical hole of the front limiting ring 31 and the second conical hole of the rear limiting ring 32, respectively. Due to the first conical hole, the second conical hole, the front conical surface and the rear conical surface... Since the taper is the same, when the inner ring 33 is inserted into the front limiting ring 31 and the rear limiting ring 32, the front and rear end directions of the inner ring 33 do not need to be considered, which facilitates the installation of the inner ring 33. The inner ring 33 is fitted onto the annular groove of the shaft hub 21. Tightening the adjusting bolt 34 causes the front limiting ring 31 and the rear limiting ring 32 to move synchronously in opposite directions, applying a clamping force to the inner ring 33 through wedging. After being squeezed, the inner ring 33 will shrink at the cross-section, thus clamping itself onto the annular groove of the shaft hub 21. Because the groove bottom thickness between the annular groove and the inner wall of the shaft hub 21 is relatively thin, the annular groove of the shaft hub 21 will narrow under the clamping force of the inner ring 33, thus clamping itself onto the main shaft 1. The shaft hub 21 is then... Locked onto the main shaft 1, the reducer 2 drives the shaft hub 21 to rotate together with the main shaft 1. The thickness of the groove bottom between the annular groove on the shaft hub 21 and the inner wall of the shaft hub 21 ensures that it is tightly clamped onto the main shaft 1 under clamping force, and also ensures that it will not be torn or damaged by the huge load force when driving the main shaft 1 for transmission. The buffer washer 35 between the front limit ring 31 and the rear limit ring 32 not only serves as a seal to prevent external dust from passing through the gap between the front limit ring 31 and the rear limit ring 32 to contaminate and corrode the inner ring 33, but also serves as a vibration absorber to prevent the adjusting bolt 34 between the front limit ring 31 and the rear limit ring 32 from loosening due to vibration during the operation of the entire equipment.

[0017] During maintenance, loosening the adjusting bolt 34 causes the front limiting ring 31 and the rear limiting ring 32 to automatically separate under the elastic force of the inner ring 33. This reduces the clamping force of the front limiting ring 31 and the rear limiting ring 32 on the inner ring 33. Under the elastic force, the inner ring 33 expands on its own, reducing the clamping force on the hub 21. This causes loosening between the hub 21 and the main shaft 1. Then, the circular baffle 12 on the main shaft 1 can be removed, allowing the main shaft 1 to be pulled out of the hub 21, greatly reducing the disassembly work. When it is necessary to connect the spindle 1 and the hub 21, one end of the spindle 1 is inserted into the corresponding side of the hub 21. Then, a circular baffle 12 is set on the spindle 1, and the circular baffle 12 abuts against the hub 21. Then, the locking disc 3 is fitted onto the annular groove of the hub 21, and the adjusting bolt 34 is tightened to tighten the locking disc 3 and clamp the hub 21 and the spindle 1. Due to the limiting effect of the circular baffle 12 on the spindle 1 and the hub 21, no sliding friction will occur between the spindle 1 and the hub 21 during the clamping process, preventing the locking force of the locking disc 3 on the spindle 1 and the hub 21 from being affected by sliding friction during the locking process.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A quick-release locking structure between the main shaft and the reducer in a chain grate machine, including: A spindle and a reducer, characterized in that: a hub is provided in the reducer, one end of the hub extends outward from the reducer, and an annular groove is formed on the outer wall of the hub extending outward from the reducer; one end of the spindle extends into the corresponding hub in the reducer; a locking disc is engaged in the annular groove; the locking disc includes: a front limiting ring, a rear limiting ring, and a cross-sectional inner ring; a plurality of through holes are evenly distributed around the circumference of the front limiting ring, and the same number of threaded through holes are evenly distributed around the circumference of the rear limiting ring. The inner ring has a front conical surface and a rear conical surface on its front and rear sides, respectively. An adjusting bolt is movably inserted in the through hole of the front limiting ring. The adjusting bolt is threadedly connected to the threaded through hole of the rear limiting ring. The inner ring is locked in the front and rear limiting rings and fitted onto the annular groove of the shaft hub. When the adjusting bolt is tightened, the front and rear limiting rings apply a clamping force to the inner ring, which is then clamped onto the annular groove of the shaft hub. After being clamped, the shaft hub narrows and clamps onto the main shaft.

2. The quick-release locking structure between the main shaft and the reducer in the chain grate machine according to claim 1, characterized in that: A first conical hole is provided in the front limiting ring, and the conical surface of the first conical hole is inclined from front to back and from bottom to top. A second conical hole is provided in the rear limiting ring, and the conical surface of the second conical hole is inclined from front to back and from top to bottom. The front conical surface of the inner ring of the cross section is wedged with the first conical hole of the front limiting ring, and the rear conical surface of the inner ring of the cross section is wedged with the second conical hole of the rear limiting ring.

3. The quick-release locking structure between the main shaft and the reducer in the chain grate machine according to claim 2, characterized in that: The taper of the first conical hole, the second conical hole, the front conical surface, and the rear conical surface are all the same.

4. The quick-release locking structure between the main shaft and the reducer in the chain grate machine according to claim 1, 2, or 3, characterized in that: A buffer washer is sandwiched between the front limit ring and the rear limit ring.

5. The quick-release locking structure between the main shaft and the reducer in the chain grate machine according to claim 1, characterized in that: The thickness of the groove bottom between the annular groove and the inner wall of the hub is 0.35 to 0.4 times the thickness of the hub wall.

6. The quick-release locking structure between the main shaft and the reducer in the chain grate machine according to claim 1, characterized in that: A weight-reducing balance hole is provided along the axis of the spindle. A circular baffle is provided at each end of the spindle. The circular baffle is abutted against the end of the spindle by connecting bolts. The axis of the circular baffle coincides with the axis of the spindle and abuts against the hub.

7. The quick-release locking structure between the main shaft and the reducer in the chain grate machine according to claim 1, characterized in that: The speed reducer is a three-ring speed reducer.

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