Grinding piece assembling and disassembling assembly with good anti-falling performance
By setting up an elastic telescopic mechanism in the grinding sub loading and unloading assembly of the train tread cleaner to control the expansion and contraction of the lock tongue, the problem of failure of the anti-detachment device under vibration is solved, and the anti-detachment performance and service life are improved.
Patent Information
- Application Number
- CN202421096273.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The anti-detachment device of the existing train tread cleaner is prone to failure under severe vibration, causing the grinder to break away from the grinder holder, posing a safety hazard.
Design a grinder loading and unloading assembly with good anti-detachment performance. By setting an elastic telescopic mechanism inside the insertion head, the extension and retraction of the lock tongue are controlled to ensure that the lock tongue always effectively locks the grinder holder and avoids the risk of disengagement.
It effectively avoids the hidden danger of the grinder breaking away from the grinder holder caused by the lock tongue detachment and anti-dislocation, improves the anti-detachment performance, and reduces the impact force of the grinder when it contacts the wheel tread, and extends the service life.
Smart Images
Figure CN222247146U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of train track tread cleaning equipment, in particular to a grinding sub-assembly and disassembly component with good anti-slip performance. Background Art
[0002] At present, when the wheel tread of a rail transit vehicle is damaged, out of round, or has low viscosity, the wheel surface condition can be improved, slipping and idling can be prevented, and the wheel tread can be corrected by contacting the grinding wheel of the tread cleaning device. The tread cleaning device of the prior art includes a grinding wheel and a grinding wheel holder. After the grinding wheel and the grinding wheel holder are connected, they are locked by an anti-slip device. However, the working condition of the grinding wheel is relatively bad during use. Severe vibration will cause the hook tongue on the anti-slip device to be out of the anti-slip position, causing the anti-slip device to fail, thereby causing the grinding wheel to be out of the grinding wheel holder, which is very likely to cause a safety accident.
[0003] For example, the Chinese utility model patent with application number 200920234382.9 discloses a grinding sub loading and unloading structure for a train tread cleaner, which has a brake shoe support, a rectangular cavity is arranged on the top of the brake shoe support, rectangular grooves are arranged on both sides and the top of the rectangular cavity, an elastic reset device is arranged in the rectangular cavity, and the rectangular grooves on both sides of the rectangular cavity are respectively provided with mounting hooks, the elastic reset device is fixedly arranged with the mounting hook, and a boss and an inclined surface are arranged on the mounting hook, the boss is arranged in the rectangular groove, and the inclined surface is arranged outside the rectangular groove. The elastic reset device is a torsion spring, the torsion spring body is arranged in the rectangular groove on the top of the rectangular cavity, and the two legs of the torsion spring are respectively arranged in the mounting hooks. The problem of the train tread cleaner grinding wheel loading and unloading structure during use is that: because the two legs of the torsion spring are respectively arranged in the mounting hooks on both sides of the rectangular cavity, under the severe vibration conditions during the train running, the two legs of the torsion spring will continue to vibrate or even rotate or separate from the mounting hook, so there is a risk that the mounting hook will separate from the torsion spring legs and retract into the rectangular cavity, that is, there is a hidden danger that the grinding wheel will separate from the grinding wheel support (also known as the brake shoe support). To this end, the utility model proposes a grinding wheel loading and unloading assembly with good anti-separation performance, in order to solve the above technical problems. Summary of the invention
[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a grinding wheel assembly and disassembly assembly with good anti-slip performance. The elastic telescopic mechanism that elastically controls and drives the two locking tongues to extend or retract from the through holes on the left and right sides of the insertion head to the inside of cavity one is arranged in cavity one inside the insertion head, thereby permanently eliminating the hidden danger of the elastic telescopic mechanism failing to shift or falling off, thereby effectively avoiding the problem of the locking tongue being separated from the anti-slipping due to the displacement or falling off of the elastic telescopic mechanism, that is, eliminating the hidden danger of the grinding wheel being separated from the grinding wheel support due to the locking tongue being separated from the anti-slipping, ensuring that the grinding wheel assembly and disassembly assembly has good anti-slip performance. At the same time, the elastic telescopic mechanism can also effectively reduce the impact force when the grinding wheel contacts the wheel tread, which helps to extend the overall service life of the grinding wheel assembly and disassembly assembly. The overall structural design is simple, the preparation and implementation feasibility is high, and the economy and practicality are strong.
[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is to design a grinding subassembly and disassembly assembly with good anti-slip performance, including a grinding subassembly, a grinding subassembly holder and an anti-slip assembly, the upper side of the grinding subassembly is provided with a back plate, the back plate is provided with a first connecting portion, the first connecting portion includes an insertion hole; the grinding subassembly holder includes a second connecting portion, the second connecting portion includes an insertion head extending to the front side, the second connecting portion is suitable for being connected to the first connecting portion to connect the grinding subassembly holder and the back plate, the insertion head is suitable for being assembled into the insertion hole when the first connecting portion and the second connecting portion are assembled in place, the insertion head has a cavity with an opening facing the front side, and the left and right side walls of the insertion head are respectively provided with a corresponding cavity connected to the cavity. A through hole that intersects each other, the anti-slip assembly includes two locking tongues and an elastic telescopic mechanism installed inside the cavity one, the locking tongue includes a locking section and a limiting section, the locking section of one locking tongue movably passes through the through hole on the left side of the insertion head and extends to the outside of the left side of the insertion head, the locking section of the other locking tongue movably passes through the through hole on the right side of the insertion head and extends to the outside of the right side of the insertion head, the front end of the elastic telescopic mechanism abuts against the rear ends of the limiting sections on the two locking tongues, and the rear end of the elastic telescopic mechanism abuts against the bottom of the cavity one, and when the grinder and the grinder support are assembled in place through the first connecting part and the second connecting part, the locking sections on the two locking tongues extend to the outside of the insertion head and are respectively clamped on the front end edges located on the left and right sides of the insertion hole.
[0006] The utility model discloses a grinding wheel assembly and disassembly component with good anti-slip performance. By elastically controlling and driving two locking tongues to extend or retract from the inside of the through holes on the left and right sides of the insertion head to the inside of the cavity one, an elastic telescopic mechanism is arranged in the cavity one inside the insertion head, thereby permanently eliminating the hidden danger of the elastic telescopic mechanism shifting failure or falling off, thereby effectively avoiding the problem of the locking tongue being separated from the anti-slipping due to the displacement or falling off of the elastic telescopic mechanism, that is, eliminating the hidden danger of the grinding wheel being separated from the grinding wheel support due to the locking tongue being separated from the anti-slipping, ensuring that the grinding wheel assembly and disassembly component has good anti-slip performance. At the same time, the elastic telescopic mechanism can also effectively reduce the impact force when the grinding wheel contacts the tread of the wheel, which helps to prolong the overall service life of the grinding wheel assembly and disassembly component. The overall structural design is simple, the preparation and implementation feasibility is high, and the economy and practicality are strong.
[0007] The preferred technical solution is that the elastic telescopic mechanism includes a slider and a spring, the front end of the spring abuts against the rear end of the slider, the rear end of the spring abuts against the bottom of the cavity, and the front end of the slider is embedded in and abuts against the gap between the limiting segments on the two locking tongues. The elastic telescopic mechanism has an ingenious and reasonable structural design, and has good adaptability and stability with the assembly relationship between the two locking tongues, which helps to further improve the anti-slip performance of the grinding sub assembly and disassembly assembly of the utility model.
[0008] A further preferred technical solution is that the grinding sub holder is provided with a cavity 2 corresponding to the inner end of the cavity 1, and the cross-sectional profile size of the cavity 2 is less than the cross-sectional profile size of the cavity 1, the center of the bottom of the cavity 2 is provided with an embedding groove 1, the slider is slidably installed in the cavity 2, and the rear end surface of the slider is provided with an embedding groove 2, the left and right sides of the front end of the slider are provided with an inclined surface 1 that gradually shrinks from the back to the front, the rear end of the limiting section on the two locking tongues is provided with an inclined surface 2 that fits the inclined surface 1, and the front end of the spring is embedded in the embedding groove 2, and the rear end is embedded in the embedding groove 1. The front end of the spring is embedded in the embedding groove 2 on the rear end surface of the slider, and the rear end is embedded in the embedding groove 1 at the bottom of the cavity 2, thereby significantly improving the installation stability of the spring in the cavity 1 and the cavity 2, and effectively preventing the spring from shifting; the front end of the slider is fitted with the inclined surface 2 at the rear end of the upper limit section of the two locking tongues through the two inclined surfaces 1, which significantly improves the fit between the front end of the slider and the rear end of the two locking tongues, which helps to greatly improve the smoothness of the assembly or disassembly of the grinding sub and the grinding sub holder.
[0009] A further preferred technical solution is that the front end of the slider is provided with an air hole which is connected to the embedding groove 2. The air hole can keep the pressure of the cavity 1 and the cavity 2 balanced with the external air pressure, thereby ensuring the smoothness of the installation or removal of the grinding wheel and the grinding wheel holder.
[0010] A further preferred technical solution is that the end of the locking section extending to the outside of the insertion head is configured as a slope structure that gradually expands outward from front to back. When the grinder and the grinder holder are plugged and assembled, the slope structure ensures that the locking section on the lock tongue can be smoothly squeezed and retracted into the corresponding through hole by the front edges of the grinder located on the left and right sides of the insertion hole, thereby ensuring that the insertion head can smoothly pass through the insertion hole and extend to the outside of the front end of the grinder.
[0011] A further preferred technical solution is that the locking section on the lock tongue is located at one end inside the cavity and is vertically fixed to the rear end of the corresponding limiting section. The lock tongue structure is simple and reasonable in design, ensuring that the grinding sub-assembly and disassembly assembly of the utility model can be smoothly prepared and implemented.
[0012] A further preferred technical solution is that the first connection part is an insertion groove arranged on the side of the back plate away from the grinder, the insertion hole is located in the middle of the front end of the insertion groove, and the rear end of the insertion groove is open; the second connection part is a base plate, the insertion head is integrally formed in the middle of the front end of the base plate, the cavity 2 is located inside the front end of the base plate, and the side of the base plate away from the grinder has a pair of ear plates; when the grinder and the grinder holder are assembled in place through the first connection part and the second connection part, the base plate is plugged into the insertion groove from the open end. The first connection part and the second connection part have ingenious and reasonable structural designs, good adaptability, and convenient plug-in installation or disassembly operations, thereby ensuring that the grinder assembly and disassembly assembly of the utility model can be smoothly prepared and implemented, and the insertion head and the insertion hole are respectively located in the middle of the grinder holder and the grinder, ensuring the overall structural stability of the grinder holder and the grinder after assembly.
[0013] A further preferred technical solution is that the middle of the upper and lower inner walls of the cavity one and the middle of the upper and lower inner walls of the cavity two are provided with guide grooves in the front-to-back direction, and the cross section of the guide grooves is an arc-shaped concave structure, and the upper and lower sides of the spring are respectively located inside the corresponding guide grooves. The guide grooves guide and limit the movement of the spring in the front-to-back direction inside the cavity one and the cavity two, effectively preventing the spring from shifting, thereby helping to further improve the positioning accuracy of the grinding wheel and the grinding wheel holder when disassembling or installing.
[0014] The advantages and beneficial effects of the utility model are:
[0015] 1. The utility model discloses a grinding wheel assembly and disassembly assembly with good anti-slip performance. The elastic telescopic mechanism that elastically controls and drives two locking tongues to extend or retract from the inside of the through holes on the left and right sides of the insertion head to the inside of the cavity one is arranged in the cavity one inside the insertion head, thereby permanently eliminating the hidden danger of the elastic telescopic mechanism shifting, failing or falling off, thereby effectively avoiding the problem of the locking tongue being separated from the anti-slipping due to the displacement or falling off of the elastic telescopic mechanism, that is, eliminating the hidden danger of the grinding wheel being separated from the grinding wheel support due to the locking tongue being separated from the anti-slipping, ensuring that the grinding wheel assembly and disassembly assembly has good anti-slip performance. At the same time, the elastic telescopic mechanism can also effectively reduce the impact force when the grinding wheel contacts the wheel tread, which helps to extend the overall service life of the grinding wheel assembly and disassembly assembly; the overall structural design is simple, the preparation and implementation feasibility is high, and the economy and practicality are strong.
[0016] 2. The elastic telescopic mechanism has an ingenious and reasonable structural design, and has good adaptability and stability with the assembly relationship between the two locking tongues, which helps to further improve the anti-slip performance of the grinding sub-assembly and disassembly assembly of the utility model.
[0017] 3. The front end of the spring is embedded in the second embedding groove on the rear end surface of the slider, and the rear end is embedded in the first embedding groove at the bottom of the second cavity, thereby significantly improving the installation stability of the spring in the first cavity and the second cavity, and effectively preventing the spring from shifting; the front end of the slider is fitted with the second embedding groove at the rear end of the upper limit segments of the two lock tongues through two inclined surfaces 1, which significantly improves the fit between the front end of the slider and the rear end of the two lock tongues, and helps to greatly improve the smoothness of the assembly or disassembly of the grinder and the grinder holder.
[0018] 4. The front end of the slider is provided with an air hole which is connected with the second embedding groove. The air hole can keep the pressure of cavity 1 and cavity 2 balanced with the external air pressure at all times, thereby ensuring the smoothness of the installation or removal of the grinding wheel and the grinding wheel holder.
[0019] 5. The end of the locking section extending to the outside of the insertion head is set as a slope structure that gradually expands outward from front to back. When the grinder and the grinder holder are plugged and assembled, the slope structure ensures that the locking section on the lock tongue can be smoothly squeezed and retracted into the corresponding through hole by the front edges of the grinder on the left and right sides of the insertion hole, thereby ensuring that the insertion head can smoothly pass through the insertion hole and extend to the outside of the front end of the grinder.
[0020] 6. The structural design of the first connecting part and the second connecting part is ingenious and reasonable, the two have good adaptability, and the plug-in installation or disassembly operation is convenient, thereby ensuring that the grinding sub assembly and disassembly assembly of the utility model can be smoothly prepared and implemented, and the insertion head and the insertion hole are respectively located in the middle of the grinding sub holder and the grinding sub, ensuring the overall structural stability of the grinding sub holder and the grinding sub after assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1It is a three-dimensional structural schematic diagram of the grinding head assembly and disassembly assembly with good anti-drop performance of the utility model;
[0022] Figure 2 It is a three-dimensional structural diagram of the grinding wheel;
[0023] Figure 3 It is a three-dimensional structural diagram of the grinding sub-holder;
[0024] Figure 4 It is a top view (partial cross-section) of the grinding head assembly and disassembly assembly with good anti-drop performance of the utility model;
[0025] Figure 5 yes Figure 4 A partial enlarged view of the H in the middle;
[0026] Figure 6 It is a three-dimensional structural diagram of the slider and the lock tongue in the anti-slip assembly;
[0027] Figure 7 This is a disassembled view of the use status of the grinding head assembly and disassembly component of the utility model with good anti-drop performance.
[0028] In the figure: 1. grinder; 2. grinder support; 3. anti-slip assembly; 1-1. back plate; 1-1a. insertion groove; 1-1b. insertion hole; 1-1c. front edge; 2-1. insertion head; 2-2. base plate; 2-3. cavity one; 2-3a. through hole; 2-3b. guide groove; 2-4. cavity two; 2-4a. embedding groove one; 2-5. ear plate; 3-1. slider; 3-1a. inclined plane one; 3-1b. embedded groove two; 3-1c. air vent; 3-2. locking tongue; 3-2a. inclined plane two; 3-2b. limiting section; 3-2c. locking section; 3-2d. slope structure; 3-3. spring. DETAILED DESCRIPTION
[0029] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.
[0030] Example
[0031] like Figures 1 to 6As shown, the utility model is a grinding subassembly and disassembly assembly with good anti-slip performance, comprising a grinding subassembly 1, a grinding subassembly holder 2 and an anti-slip assembly 3, the grinding subassembly 1 having a back plate 1-1 on its upper side, the back plate 1-1 having a first connecting portion, the first connecting portion comprising an insertion hole 1-1b; the grinding subassembly holder 2 comprising a second connecting portion, the second connecting portion comprising an insertion head 2-1 extending toward the front side, the second connecting portion being suitable for being connected to the first connecting portion to connect the grinding subassembly holder 2 and the back plate 1-1, the insertion head 2-1 being suitable for being assembled into the insertion hole 1-1b when the first connecting portion and the second connecting portion are assembled in place, the insertion head 2-1 having a cavity 2-3 opening toward the front side, the left and right side walls of the insertion head 2-1 respectively correspondingly being provided with a through hole 2-3a intersecting the cavity 2-3, the anti-slip assembly 3 comprising a through hole 2-3a installed in the cavity 2-3 The two locking tongues 3-2 and the elastic telescopic mechanism inside 2-3, the locking tongue 3-2 includes a locking section 3-2c and a limiting section 3-2b, the locking section 3-2c of one locking tongue 3-2 moves through the through hole 2-3a on the left side of the insertion head 2-1 and extends to the left side of the insertion head 2-1, the locking section 3-2c of the other locking tongue 3-2 moves through the through hole 2-3a on the right side of the insertion head 2-1 and extends to the right side of the insertion head 2-1. The front end of the elastic telescopic mechanism abuts against the rear end of the limiting section 3-2b on the two locking tongues 3-2, and the rear end of the elastic telescopic mechanism abuts against the bottom of the cavity 1 2-3. When the grinder 1 and the grinder holder 2 are assembled in place through the first connecting part and the second connecting part, the locking sections 3-2c on the two locking tongues 3-2 extend to the outside of the insertion head 2-1 and are respectively snapped onto the front end edges 1-1c on the left and right sides of the insertion hole 1-1b.
[0032] Preferably, the elastic telescopic mechanism includes a slider 3-1 and a spring 3-3, the front end of the spring 3-3 abuts against the rear end of the slider 3-1, the rear end of the spring 3-3 abuts against the bottom of the cavity 2-3, and the front end of the slider 3-1 is embedded in and abuts against the gap between the limiting sections 3-2b on the two locking tongues 3-2.
[0033] Further preferably, the grinding sub-holder 2 is provided with a cavity 2-4 which is corresponding to the inner end of the cavity 1 2-3 and passes through, and the cross-sectional profile size of the cavity 2-4 is less than the cross-sectional profile size of the cavity 1 2-3, a groove 2-4a is provided at the bottom center of the cavity 2-4, the slider 3-1 is slidably installed in the cavity 2-4, and a groove 2-1b is provided on the rear end face of the slider 3-1, and the left and right sides of the front end of the slider 3-1 are correspondingly provided with an inclined surface 1 3-1a which gradually shrinks from the back to the front, the rear ends of the limiting segments 3-2b on the two locking tongues 3-2 are provided with an inclined surface 3-2a which fits the inclined surface 1 3-1a, and the front end of the spring 3-3 is embedded in the embedded groove 2 3-1b, and the rear end is embedded in the embedded groove 2-4a.
[0034] Further preferably, the front end of the slider 3-1 is provided with a vent hole 3-1c which is in communication with the second embedding groove 3-1b.
[0035] Further preferably, one end of the locking section 3-2c extending to the outside of the insertion head 2-1 is configured as a slope structure 3-2d that gradually expands outward from front to back.
[0036] Further preferably, one end of the locking section 3-2c on the locking tongue 3-2 located inside the cavity 2-3 is vertically fixed to the rear end of the corresponding limiting section 3-2b.
[0037] Further preferably, the first connecting portion is an insertion groove 1-1a arranged on the side of the back plate 1-1 away from the grinder 1, the insertion hole 1-1b is located in the middle of the front end of the insertion groove 1-1a, and the rear end of the insertion groove 1-1a is open; the second connecting portion is a substrate 2-2, the insertion head 2-1 is integrally formed in the middle of the front end of the substrate 2-2, the cavity 2-4 is located inside the front end of the substrate 2-2, and the side of the substrate 2-2 away from the grinder 1 has a pair of ear plates 2-5; when the grinder 1 and the grinder holder 2 are assembled in place through the first connecting portion and the second connecting portion, the substrate 2-2 is inserted into the insertion groove 1-1a from the open end of the insertion groove 1-1a.
[0038] Further preferably, guide grooves 2-3b located in the front-to-back direction are correspondingly provided in the middle of the upper and lower inner walls of the cavity 1 2-3 and the middle of the upper and lower inner walls of the cavity 2 2-4, and the cross-section of the guide grooves 2-3b is an arc-shaped concave structure, and the upper and lower sides of the spring 3-3 are respectively located inside the corresponding guide grooves 2-3b.
[0039] The use principle of the grinding head assembly and disassembly assembly with good anti-drop performance in the utility model:
[0040] When installing the grinder 1, the base plate 2-2 of the grinder holder 2 is inserted into the insertion groove 1-1a from the open end thereof, wherein the insertion head 2-1 corresponds to the insertion hole 1-1b. During the insertion of the insertion head 2-1 into the insertion hole 1-1b, the front end edges 1-1c located on the left and right sides of the insertion hole 1-1b squeeze and retract the slope structure 3-2d of the locking segments 3-2c on the two locking tongues 3-2 back into the corresponding through hole 2-3a, so that the insertion head 2-1 can smoothly pass through the insertion hole 1-1b to the front end outside of the grinder 1. Then, the locking segments 3-2c on the two locking tongues 3-2 pass through the corresponding through holes 2-3a again under the elastic reset action of the spring 3-3 and extend to the outside of the insertion head 2-1 and abut against the front side faces of the front end edges 1-1c on the left and right sides of the insertion hole 1-1b, thereby completing the installation of the grinder 1 on the grinder holder 2. Figure 7 shown.
[0041] When removing the grinding wheel 1, the operator holds the slope structure 3-2d of the locking section 3-2c on the locking tongues 3-2 on both sides of the insertion head 2-1 with one hand and squeezes it toward the inner side of the cavity 2-3, so that the slope structure 3-2d of the locking section 3-2c retracts to the inside of the corresponding through hole 2-3a; then, the operator holds the grinding wheel 1 with the other hand and moves it toward the end of the insertion head 2-1, so that the grinding wheel 1 is detached from the grinding wheel holder 2, thereby completing the removal of the grinding wheel 1 from the grinding wheel holder 2.
[0042] The utility model discloses a grinding wheel assembly and disassembly component with good anti-slip performance. By elastically controlling and driving two locking tongues to extend or retract from the inside of the through holes on the left and right sides of the insertion head to the inside of the cavity one, an elastic telescopic mechanism is arranged in the cavity one inside the insertion head, thereby permanently eliminating the hidden danger of the elastic telescopic mechanism shifting failure or falling off, thereby effectively avoiding the problem of the locking tongue being separated from the anti-slipping due to the displacement or falling off of the elastic telescopic mechanism, that is, eliminating the hidden danger of the grinding wheel being separated from the grinding wheel support due to the locking tongue being separated from the anti-slipping, ensuring that the grinding wheel assembly and disassembly component has good anti-slip performance. At the same time, the elastic telescopic mechanism can also effectively reduce the impact force when the grinding wheel contacts the tread of the wheel, which helps to prolong the overall service life of the grinding wheel assembly and disassembly component. The overall structural design is simple, the preparation and implementation feasibility is high, and the economy and practicality are strong.
[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A grinding wheel assembly and disassembly assembly with good anti-slip performance, comprising a grinding wheel (1), a grinding wheel holder (2) and an anti-slip assembly (3), wherein the grinding wheel (1) has a back plate (1-1) on its upper side, the back plate (1-1) is provided with a first connecting portion, the first connecting portion comprises an insertion hole (1-1b); the grinding wheel holder (2) comprises a second connecting portion, the second connecting portion comprises an insertion head (2-1) extending toward the front side, the second connecting portion is suitable for connecting with the first connecting portion to connect the grinding wheel holder (2) and the back plate (1-1), the insertion head (2-1) is suitable for being assembled into the insertion hole (1-1b) when the first connecting portion and the second connecting portion are assembled in place, characterized in that The insertion head (2-1) has a cavity (2-3) with an opening toward the front side, and the left and right side walls of the insertion head (2-1) are respectively provided with a through hole (2-3a) that is connected to the cavity (2-3). The anti-drop assembly (3) includes two locking tongues (3-2) installed in the cavity (2-3) and an elastic telescopic mechanism. The locking tongue (3-2) includes a locking section (3-2c) and a limiting section (3-2b). The locking section (3-2c) of one locking tongue (3-2) movably passes through the through hole (2-3a) on the left side of the insertion head (2-1) and extends to the left side of the insertion head (2-1). The other locking tongue The locking section (3-2c) of the two locking tongues (3-2) is movable through the through hole (2-3a) on the right side of the insertion head (2-1) and extends to the outside of the right side of the insertion head (2-1); the front end of the elastic telescopic mechanism abuts against the rear ends of the limiting sections (3-2b) on the two locking tongues (3-2); the rear end of the elastic telescopic mechanism abuts against the bottom of the cavity (2-3); when the grinding wheel (1) and the grinding wheel holder (2) are assembled in place through the first connecting part and the second connecting part, the locking sections (3-2c) on the two locking tongues (3-2) extending to the outside of the insertion head (2-1) are respectively clamped on the front end edges (1-1c) located on the left and right sides of the insertion hole (1-1b).
2. The grinding wheel assembly and disassembly assembly with good anti-drop performance according to claim 1, characterized in that: The elastic telescopic mechanism comprises a slider (3-1) and a spring (3-3), the front end of the spring (3-3) abuts against the rear end of the slider (3-1), the rear end of the spring (3-3) abuts against the bottom of cavity 1 (2-3), and the front end of the slider (3-1) is embedded in and abuts against the gap between the limiting sections (3-2b) on the two locking tongues (3-2).
3. The grinding wheel assembly and disassembly assembly with good anti-drop performance as claimed in claim 2, characterized in that: The grinding sub-holder (2) is provided with a cavity 2 (2-4) which is connected to the inner end of the cavity 1 (2-3), and the cross-sectional profile size of the cavity 2 (2-4) is smaller than the cross-sectional profile size of the cavity 1 (2-3). The center of the bottom of the cavity 2 (2-4) is provided with an embedding groove 1 (2-4a). The slider (3-1) is slidably installed in the cavity 2 (2-4), and the rear end surface of the slider (3-1) is provided with an embedding groove 2 (3-1b). The left and right sides of the front end of the slider (3-1) are correspondingly provided with an inclined surface 1 (3-1a) which gradually shrinks from the back to the front. The rear ends of the limiting sections (3-2b) on the two locking tongues (3-2) are provided with an inclined surface 2 (3-2a) which is fitted with the inclined surface 1 (3-1a). The front end of the spring (3-3) is embedded in the embedding groove 2 (3-1b), and the rear end is embedded in the embedding groove 1 (2-4a).
4. The grinding wheel assembly and disassembly assembly with good anti-drop performance as claimed in claim 3, characterized in that: The front end of the sliding block (3-1) is provided with an air hole (3-1c) which is in communication with the second embedding groove (3-1b).
5. The grinding wheel assembly and disassembly assembly with good anti-drop performance as claimed in claim 4, characterized in that: One end of the locking section (3-2c) extending to the outside of the insertion head (2-1) is configured as a slope structure (3-2d) that gradually expands outward from front to back.
6. The grinding wheel assembly and disassembly assembly with good anti-drop performance as claimed in claim 5, characterized in that: One end of the locking section (3-2c) on the locking tongue (3-2) located inside the cavity (2-3) is vertically fixed to the rear end of the corresponding limiting section (3-2b).
7. The grinding wheel assembly and disassembly assembly with good anti-drop performance according to claim 6, characterized in that: The first connection part is an insertion groove (1-1a) arranged on the side of the back plate (1-1) away from the grinding wheel (1), the insertion hole (1-1b) is located in the middle of the front end of the insertion groove (1-1a), and the rear end of the insertion groove (1-1a) is open; the second connection part is a base plate (2-2), the insertion head (2-1) is integrally formed in the middle of the front end of the base plate (2-2), the cavity 2 (2-4) is located inside the front end of the base plate (2-2), and the side of the base plate (2-2 away from the grinding wheel (1) has a pair of ear plates (2-5); when the grinding wheel (1) and the grinding wheel holder (2) are assembled in place through the first connection part and the second connection part, the base plate (2-2) is inserted into the inside of the insertion groove (1-1a) from the open end of the insertion groove (1-1a).
8. The grinding wheel assembly and disassembly assembly with good anti-drop performance as claimed in claim 7, characterized in that: A guide groove (2-3b) located in the front-to-back direction is correspondingly provided at the middle of the upper and lower inner walls of the cavity one (2-3) and the middle of the upper and lower inner walls of the cavity two (2-4), and the cross section of the guide groove (2-3b) is an arc-shaped concave structure, and the upper and lower sides of the spring (3-3) are respectively located inside the corresponding guide groove (2-3b).