2172 results about "Open hole" patented technology

The direct-drive vertical sand mill comprises a supporting frame, a sliding mechanism, a barrel, a motor mechanism, a grinding part and a lifting mechanism, the supporting frame is provided with a containing space, the side wall of the supporting frame is provided with a communicating channel communicating with the containing space, and the supporting frame is provided with an open hole communicating with the containing space; the sliding mechanism is slidably arranged in the containing space, the barrel is arranged on the sliding mechanism, the motor mechanism is arranged at the top of the supporting frame in a liftable mode, the grinding part is fixedly arranged on the bottom face of the motor mechanism, and the lifting mechanism is arranged in the supporting frame and used for driving the grinding part to ascend and descend. Through the mode, the sand mill disclosed by the invention can drive the grinding part to ascend and descend through the lifting mechanism, so that the grinding part can be easily detached from the cylinder body, and the cylinder body can slide out of the sand mill through the sliding mechanism, so that the cylinder body and / or the grinding part can be conveniently maintained or replaced, the labor intensity of workers is low, the intelligent degree is high, and the safety is also high; and the efficiency is high.

The invention discloses an elastic support integrated bearing and squeeze film damper integrated structure with outer ring radial holes. The elastic support integrated bearing and squeeze film damper integrated structure comprises an elastic support integrated outer ring, a bearing inner ring, a retainer, a rolling body, a squeeze film damper, a bearing seat and the like. The elastic support integrated outer ring adopts the integrated design of a squirrel-cage type elastic support and the bearing outer ring, the radial size is reduced, the centering precision is improved, and an oil storage groove and a radial oil hole are formed in the outer side wall of the bearing outer ring of the integrated structure; the extrusion oil film damper is located on the outer side of the elastic support integrated bearing, and an oil film is communicated with a radial oil hole in the bearing outer ring, so that bearing lubrication and the extrusion oil film damper share a lubricating oil path; radial lubricating oil lubrication of the bearing is achieved through the arrangement of the radial oil holes, and the situation that the bearing is damaged due to lack of oil lubrication under the extreme working condition is avoided; meanwhile, the oil storage grooves and the radial oil holes can effectively promote flowing of lubricating oil in an oil film, formation of a dead cavity of the squeeze oil film damper is avoided, and the vibration reduction effect of the squeeze oil film damper is enhanced.

The invention discloses a foundation pit gas film foundation and a construction method thereof.The foundation pit gas film foundation comprises H-shaped steel which is sequentially connected end to end, the H-shaped steel is composed of an upper flange plate, a lower flange plate and a web, one end of the web is connected with the upper flange plate, the other end of the web is connected with the lower flange plate making contact with the ground, and the lower flange plate is provided with an open hole and a fixing mechanism; the foundation pit air film foundation further comprises spiral ground piles penetrating through the open holes and extending into the ground. The fixing mechanism is used for limiting the spiral ground pile; a connecting mechanism connected with a gas film material is arranged on the upper flange plate; the spiral ground pile is of a hollow structure, and a buffering mechanism and a reinforcing mechanism are arranged in the spiral ground pile. When the H-shaped steel is subjected to drawing force, the fixing mechanism is driven to trigger the buffering mechanism to counteract the drawing force, and meanwhile the reinforcing mechanism is triggered to increase the underground shearing force of the spiral ground pile. The problems that when an existing foundation pit air film foundation is used in coastal areas, the foundation is unstable and an air film is turned over due to low soil bearing capacity and strong wind cannot be handled are solved.

The utility model provides an air conditioner outdoor unit which comprises a machine shell. A heat exchange air inlet; a heat exchange air outlet; an outdoor heat exchanger; a first fan; the draught fan assembly is arranged at the top of the machine shell and comprises a shell body and a draught fan assembly, a fan air inlet; a fan air outlet; a second fan; the fastening assembly comprises a fastening piece which is used for connecting the machine shell and the shell; the first connecting piece is connected with the machine shell, a through hole is formed in the first connecting piece, and the through hole corresponds to the second open hole; the second connecting piece is arranged in the shell, located above the first open hole and used for being connected with the fastening piece; the top of the fastener penetrates through the first open hole, the second connecting piece is connected with the top of the fastener to connect at least part of the shell with the fastener, the bottom of the fastener is inserted into the through hole, and the fastener is connected with the first connecting piece to enable the fastener to be connected with the machine shell, so that the fan assembly is conveniently installed to guarantee the air outlet capacity of the air conditioner outdoor unit.

The invention discloses an earth surface directional drilling high-pressure deep hole grouting construction method based on steel sleeve hole fixing. The earth surface directional drilling high-pressure deep hole grouting construction method comprises the following steps that firstly, a directional drilling machine is used for vertically drilling a grouting hole downwards; secondly, a plurality of steel floral tubes are sequentially put down in the three-opening first branch grouting hole; thirdly, cement-bentonite-based sleeve shell materials are continuously injected into the first section of the steel floral tube to the inner bottom of a first branch grouting hole of the three-opening hole, and an annular space between the first branch grouting hole of the three-opening hole and the steel floral tube string is filled with the cement-bentonite-based sleeve shell materials; fourthly, a packer is lowered to the bottom of the three-opening first branch grouting hole; a packing section is formed in front of the packer; and fifthly, cement grout is injected into the grouting pipe, grouting is conducted on the packing section, the finally-set cement-bentonite-based casing material is split and damaged under the effect of grouting pressure, and the grouting grout is injected into the stratum to be reinforced through the grout channel. According to the method, the hole collapse phenomenon when the grouting hole penetrates through the unfavorable geological section can be prevented, the grouting stopping effect of the packer is guaranteed, and retreating type segmented grouting construction is guaranteed.

The invention discloses a battery device and a power utilization device, and the battery device comprises a box body which is internally provided with a containing cavity and comprises a first plate; the heat exchange assembly comprises a first heat exchange part and a second heat exchange part which communicate with each other, the first heat exchange part is arranged outside the box body, and the second heat exchange part is arranged on the face, facing the containing cavity, of the first plate; the connecting block is arranged on the first heat exchange part; the heat exchange connector penetrates through the connecting block in the first direction and then is connected with the open hole in the first heat exchange part in a sealed mode, and the heat exchange connector is located outside the connecting block and welded to the connecting block. According to the scheme, the sealing performance of connection between the heat exchange connector and the first heat exchange part can be guaranteed, the sealing performance of the heat exchange connector and the connecting block can be guaranteed, and the sealing performance of the heat exchange connector during connection is effectively improved. Due to the fact that the heat exchange connector is connected with the first heat exchange part and the connecting block in a sealed mode, the sealing reliability can be improved.

The invention discloses a large-diameter-expansion-rate open hole packer. The large-diameter-expansion-rate open hole packer comprises a rubber sleeve sealing structure and a setting locking structure. The rubber sleeve sealing structure is mainly composed of a supporting ring, a shoulder pad, an end rubber sleeve, a spacer ring and a middle rubber sleeve. The setting locking structure is mainly composed of an upper mandrel, a lock sleeve, a lock ring, an upper hydraulic cylinder, a middle mandrel, a lower hydraulic cylinder and a lower mandrel. The middle core shaft is fixedly, hermetically and buckled at the right end of the upper core shaft, the lower core shaft is fixedly, hermetically and buckled at the right end of the middle core shaft, and the lock sleeve and the lock ring are slidably sleeved on the upper core shaft; the outer diameter of the packer body is smaller than that of a conventional open hole packer body, a larger open hole annulus can be sealed with the smaller outer diameter of a product, and the packer can be put into a well more easily while the sealing performance is guaranteed.

The invention relates to a camera module assembly method and camera module assembly equipment. The camera module assembly method is applied to the camera module assembly equipment, the camera module assembly equipment comprises a first multi-dimensional correction module, a second multi-dimensional correction module and a mover platform, the first multi-dimensional correction module and the second multi-dimensional correction module are arranged on the mover platform, the first multi-dimensional correction module comprises a lens suction nozzle, and the second multi-dimensional correction module comprises a lens suction nozzle. The lens suction nozzle is provided with a first open hole and a plurality of second open holes formed along the peripheral side of the first open hole; the camera module assembly method comprises the following steps: sucking a lens through a lens suction nozzle; assembling the lens into the motor chip assembly by adjusting the first multi-dimensional correction module or the second multi-dimensional correction module; performing active alignment on the lens and the motor chip assembly; injecting glue from the plurality of second openings through a dispensing structure on a dispensing station so as to bond the lens and the motor chip assembly to obtain a camera module; therefore, the assembly tolerance of the camera module is reduced, and the dispensing quality is improved.

The invention relates to the technical field of hydrogen storage, and discloses a metal hydride hydrogen storage system and a hydrogen absorption and desorption method. The metal hydride hydrogen storage system comprises n hydrogen storage units which are connected in series, and n is 3-20 and is a positive integer; the adjacent hydrogen storage units are connected through a detachable connecting unit, an open hole is formed in the detachable connecting unit, and the open hole is used for circulation of hydrogen; the hydrogen storage unit comprises a tank body, the tank body is filled with a hydrogen storage bed layer, and the hydrogen storage bed layer is used for hydrogen absorption / hydrogen desorption and heat conduction. According to the hydrogen storage system, the hydrogen storage volume can be flexibly controlled, hydrogen storage material filling is simpler, the heat transfer efficiency can be improved, and the hydrogen absorption and desorption rate can be better controlled.

The invention discloses a TBM construction tunnel unfavorable geological tunnel section ground pre-reinforcement method which comprises the following steps: S1, a tunnel surrounding rock category map is compiled, and surrounding rock categories and stake numbers are marked on the map; s2, the surrounding rock confirmed to be in the V type is rechecked as a target reinforcing area; s3, directional grouting drill hole arrangement; s4, drilling design is conducted in combination with the tunnel excavation design drawing and the drilling task book; s5, drilling equipment is selected; s6, drilling equipment is installed; s7, designing and installing a grouting system; s8, drilling an orifice section; s9, drilling a vertical section; s10, drilling in a deflecting section; s11, horizontal grouting section drilling is carried out; s12, horizontal section bare hole grouting is conducted; s13, lowering a floral tube; s14, grouting the floral tube; s15, the grouting effect is checked; and S16, hole sealing is conducted. Advanced reinforcement grouting is conducted on the tunnel surrounding rock on the earth surface through drilling, the physical and mechanical parameters of the tunnel surrounding rock are improved, the risk of engineering geological problems during tunnel excavation is reduced, and the tunnel construction efficiency is improved.

The invention belongs to the technical field of oil-gas field development, and discloses an intelligent separate mining process pipe column suitable for slim holes and an implementation method. The intelligent separate mining process pipe column comprises a sand control pipe column and a control pipe column, wherein the sand control pipe column comprises a sand control screen pipe located in an open hole section, a sand control top packer located at the front end of the sand control screen pipe and at least one open hole segmented sand control packer used for segmenting the open hole section to form a plurality of sub open hole sections; the bottom-hole regulator string at least comprises bottom-hole regulators located in all the sub open hole sections, electric control setting packers which are matched with the open hole segmented sand control packers in a setting mode and connected with the adjacent bottom-hole regulators, a lower intelligent node connected with the bottom-hole regulator at the foremost end and a releasing tool connected with the lower intelligent node; the production pipe column at least comprises an upper intelligent node and an electric submersible pump which are sequentially connected from bottom to top. The upper intelligent node is connected with the ground control device through a first steel pipe cable, the bottom-hole regulator is connected with the lower intelligent node through a second steel pipe cable, and the upper intelligent node penetrates through the releasing tool to be in magnetic coupling connection with the lower intelligent node.

A vibration damping device for a head-up display driving module, the device comprising: a power generating unit configured to a first damper having a predetermined thickness based on a shape corresponding to a motor mount to which a motor is fixed and a second damper fitted into an open hole of a damper mount disposed on top of the motor mount; and a power transmission unit configured to transmit power of the motor by rotating a lead screw extended and coupled to a rotating shaft of the motor.

The invention discloses a center control suspension screen supporting structure, an instrument panel assembly and a method, solves the problem that the stability of connection between a center control suspension screen and an instrument panel assembly in the prior art affects the mode of the center control screen, and has the beneficial effect of improving the mode of the center control screen. Comprising a central control screen mounting frame, the central control screen mounting frame and a central control screen are integrated, the central control screen mounting frame is inserted into a connecting support and is fixedly connected with the connecting support, the connecting support is provided with a first convex part, the first convex part extends in the direction away from an instrument panel cross beam component and is hollow, and the central control screen mounting frame is provided with a second convex part. The connecting support is provided with a plurality of first open holes so that the connecting support can be connected with the instrument board body framework through the first open holes, and the connecting support is provided with a plurality of second open holes so that the connecting support can be connected with the instrument board body framework and the instrument board beam component through the second open holes.

The utility model provides a negative pressure regulation and control structure and a ureter sheath, and belongs to the technical field of medical instruments. The negative pressure regulation and control structure comprises a negative pressure pipe and a suction valve; the negative pressure pipe is provided with a suction channel and an opening which are communicated with each other, the suction valve is in sliding fit with the negative pressure pipe, and the circulation area of the opening can be adjusted by sliding the suction valve; the suction valve comprises a valve body and a connecting protrusion which are connected with each other, the valve body is located outside the negative pressure pipe, the connecting protrusion penetrates through the open hole, partially protrudes out of the inner wall of the negative pressure pipe and is connected with the inner wall of the negative pressure pipe in a buckled mode, and the face, connected with the inner wall of the negative pressure pipe in a buckled and abutting mode, of the connecting protrusion is a limiting face. The limiting face inclines in the direction away from the valve body from the side, close to the open hole, of the limiting face to the side, away from the open hole, of the limiting face. According to the suction valve, the limiting face is obliquely arranged in the direction away from the valve body, so that the installation space between the limiting face and the valve body is enlarged, the deformation amount of the valve body needed by the connecting protrusion entering the suction channel is reduced, and the convenience of assembly of the suction valve is improved.

The utility model provides a three-position switch and a ring main unit, the three-position switch comprises a first fixed seat and a plurality of grounding contacts, each grounding contact corresponds to one phase in a power supply network, and the plurality of grounding contacts are arranged on the first fixed seat; the grounding shielding base is arranged on the first fixing base, the grounding shielding base is configured to be an integrally-formed metal piece, a plurality of open holes are formed in the grounding shielding base, and the grounding contacts are exposed out of the corresponding open holes; each second fixing seat is correspondingly provided with an isolation static contact. And a plurality of moving contacts are arranged on the third fixed seat at intervals, and the moving contacts can rotate relative to the third fixed seat so as to be electrically connected with the grounding contact or the isolation static contact selectively. By optimizing the electric field of the three-position switch, the three-position switch can have a better insulation level, and the overall size of the three-position switch is reduced. Furthermore, the three-position switch can be applied to a small-size ring main unit with space limitation and higher insulation requirements.

The double-spiral Helmholtz resonator comprises a cavity, an upper cover of the cavity is provided with at least two open holes, each open hole is internally embedded with a spiral pipe, the spiral pipes surround downwards along the interior of the cavity, the openings located above the spiral pipes are connected with a water area, a rubber coating is arranged in the cavity, and the rubber coating is arranged in the cavity. The spiral pipes are hollow spiral pipes which are not overlapped with one another, it is guaranteed that the water cavity and the resonant cavity are connected and communicated, and Helmholtz resonance is triggered through the physical interaction between the rubber coating and the embedded spiral pipes. Helmholtz resonance is triggered through the physical interaction of the rubber coating and the embedded spiral neck, an excellent sound absorption effect is achieved, theoretical prediction is well matched with a finite element simulation result, the sound absorption coefficient of the proposed double-spiral Helmholtz resonator structure cell element at 105Hz reaches 0.91, and the sound absorption coefficient of the double-spiral Helmholtz resonator structure cell element at 105Hz reaches 0.91. The wavelength k of the sound wave is 300 times of the thickness H of the metamaterial, and perfect absorption is achieved on the deep sub-wavelength scale.

The invention discloses an assembly type ocean suction type caisson foundation structure and a construction method thereof, and belongs to the field of caissons, the assembly type ocean suction type caisson foundation structure mainly comprises a caisson assembly, the caisson assembly comprises a plurality of sets of assembly type caisson bodies, reinforcing steel bars are fixedly installed in the caisson bodies, open holes are formed in the caisson bodies, oblique openings are formed in the bottoms of the caisson bodies, and the caisson bodies are fixedly installed in the open holes. According to the fabricated ocean suction type caisson foundation structure and the construction method thereof, the bionic plates and the caisson body can enter the sea together, so that the holes can make contact with seawater, and therefore the bionic plates simulate the reef environment through the holes; according to the caisson, a habitat is provided for marine organisms, a food chain is constructed, an ecological chain is repaired, biological diversity is improved, wave force can be weakened, base scouring can be reduced, structural fatigue damage can be reduced in engineering, meanwhile, a protective layer is formed through biological attachment, and caisson durability is improved.

The invention is suitable for the technical field of solar cells, and provides a cell module and a photovoltaic system, and the cell module comprises a back contact cell which comprises a first polarity grid line and a second polarity grid line; the plurality of first welding strips and the plurality of second welding strips are respectively connected with the first polarity grid line and the second polarity grid line; the insulating strip is arranged on the sides, deviating from the back contact battery, of the first welding strip and the second welding strip, and the insulating strip comprises a through hole; the bus bar is arranged on the side, away from the back contact battery, of the insulating strip, the bus bar is electrically isolated from the first welding strip through the insulating strip, and the bus bar is electrically connected with the second welding strip through the through hole; wherein the insulating strip is a flexible insulating strip and comprises an open hole part and a non-open hole part, the through hole is located in the open hole part, and the thickness of the open hole part is larger than that of the non-open hole part. According to the flexible insulating strip, the thicker opening part is arranged in the flexible insulating strip, so that a buffering effect is achieved during welding and subsequent lamination, and the risk of subfissure and fragment is reduced.

The utility model relates to the technical field of chemical equipment, and particularly discloses a reaction kettle with a distributed feeding port, which comprises a reaction kettle, a discharge port is fixed at the bottom end of the reaction kettle, a feeding pipe is fixed at the top end of the reaction kettle in a penetrating manner, the top end of the feeding pipe is fixedly connected with a head tank, and the bottom end of the feeding pipe is fixedly connected with the distributed feeding port. The distributed feeding port comprises an upper straight pipe, a middle accelerating pipe and a bottom distributing head, the pipe diameter of the accelerating pipe is smaller than that of the straight pipe and that of the distributing head, a plurality of first open holes are formed in the outer wall of the distributing head at intervals, the bottom end of the distributed feeding port protrudes upwards to form a conical bottom, and a plurality of second open holes are formed in the outer wall of the conical bottom at intervals. According to the reaction kettle, the reaction speed of materials in the reaction kettle is more balanced, local overheating caused by high-concentration violent reaction is reduced, the selectivity of the reaction is improved, side reactions are reduced, and the temperature in the reaction kettle in the feeding process is more consistent, so that the temperature fluctuation in the feeding process is reduced.

The invention relates to an automatic positioning and cutting device for tunnel section steel arch web trepanning, and belongs to the technical field of arch cutting equipment. The device comprises a conveying mechanism and a positioning and cutting mechanism, the conveying mechanism is used for conveying an arch frame, the positioning and cutting mechanism comprises a positioning assembly, a linkage assembly and a cutting assembly, the positioning assembly is arranged in front of the cutting assembly in the conveying direction of the arch frame, and the linkage assembly is connected with the positioning assembly and the cutting assembly. The lowest height of the positioning assembly is lower than that of the cutting assembly, the weight of the positioning assembly is larger than that of the cutting assembly, the positioning assembly comprises a first inclined face, and when the arch frame is conveyed in the conveying direction, a flange plate of the arch frame can abut against the first inclined face and slide relatively to push the positioning assembly to move upwards by a preset distance; the positioning assembly moves upwards to drive the cutting assembly to move downwards to be close to the web through the linkage assembly, and the cutting assembly is used for cutting and trepanning the web of the arch frame. The method has the effect of improving the problem of poor positioning precision and reliability of trepanning of the web of the arch center.

The utility model discloses a novel upturning component template reinforcing device, which relates to the technical field of template reinforcing and comprises a left connecting rod, a right connecting rod, a bolt and a nut. Openings of the left connecting rod and the right connecting rod are opposite, and the tail end of the upper portion of the left connecting rod is rotationally connected with the corner of the right connecting rod; the bolt is located between the corner of the left connecting rod and the corner of the right connecting rod and penetrates through the left connecting rod and the right connecting rod, and the tail end of the bolt is connected with the nut through threads. The utility model is suitable for reinforcing components such as upturned beams which are not suitable for opening holes in wood template engineering, and is particularly suitable for supporting templates for pouring upturned ridges in water-stop rooms; the device has the characteristics of convenience in use, simple structure, good durability, strong applicability, simplicity in operation, easiness in local material utilization, manpower and material conservation and the like.

To provide an opening reinforcement method capable of strengthening the shear strength, bending strength, and axial strength of a steel beam having openings.SOLUTION: A square frame 21 having a rectangular frame shape is welded on the periphery of the open hole 15 on a first surface 12a of a web 12 of a steel beam 10. Further, on the periphery of the open hole 15 on a second surface 12b, which is the reverse surface of the first surface 12a, a square frame 22 having the same shape as the square frame 21 but rotated 45 degrees relative to the square frame 21 is welded. With this configuration, the area around an open hole 15 formed in a web 12 of a steel beam 10 is reinforced.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of batteries, and discloses an insulating film assembly and a battery, the insulating film assembly is connected with a pole group, the insulating film assembly comprises an insulating film body and a side plate, the pole group is coated with the insulating film body, and a positioning piece is arranged on one side of the insulating film body; positioning holes are formed in the positions, corresponding to the positioning pieces, of the side plates, and the positioning pieces are clamped in the positioning holes so that the side plates can be connected with the insulating film body. Thus, the positioning piece is arranged on the insulating film body and is clamped with the positioning hole, so that the connection stability between the insulating film body and the side plate can be improved, preliminary positioning of the side plate is facilitated, the step of opening the hole in the insulating film body is omitted, the insulating film body and the side plate can be tightly attached, and the gap between the insulating film body and the side plate is reduced; and the electrolyte is prevented from leaking and corroding the shell and the anti-explosion valve.

The invention relates to the technical field of coal mine hydraulic fracturing, and discloses a coal mine roof safety hydraulic fracturing method and device. The hole sealing mechanism is arranged at one end of the water inlet pipe, and the hole sealing mechanism is used for sealing an open hole in a rock stratum through an expansion bag in the hole sealing mechanism; the water spraying mechanism is installed between every two adjacent hole sealing mechanisms, and the water spraying mechanism sprays water through a water spraying steel pipe in the water spraying mechanism; the supporting mechanism is arranged on the water spraying mechanism; by arranging the water spraying mechanism, when high-pressure water flow is sprayed out from the water spraying holes, blades above the water spraying holes are impacted, the blades are impacted to drive a rotating mounting piece to rotate on a top rotating frame, the rotating mounting piece drives a protection piece to rotate rapidly, the bottom end of the protection piece extends into a water spraying steel pipe, and the water spraying holes can be stirred; impurities injected into liquid are scattered, and the situation that water spraying holes are blocked due to impurity clustering is reduced.

The utility model relates to the field of medical instruments, in particular to an acupoint patch medicine placing device which comprises a base plate, an electric telescopic rod is arranged at the top of the base plate, a box is arranged at the top of the electric telescopic rod, a cavity and an open hole are formed in the box, the open hole communicates with the cavity, the acupoint patch medicine placing device further comprises an outflow assembly, and the outflow assembly comprises an outflow pipe. The outflow pipe is arranged in the box body, the top of the outflow pipe is communicated with the cavity, the bottom of the outflow pipe extends out of the box body, a timing electromagnetic valve is arranged on the surface of the outflow pipe and located outside the box body, and the number of the outflow assemblies is at least one set; the timing electromagnetic valve is controlled to enable ointment to flow out through the outflow pipe so as to reduce the working intensity formed by manual smearing, the multiple outflow assemblies arranged side by side can further reduce the labor intensity formed by placing a large amount of ointment of the acupoint patch, and meanwhile the ointment outflow amount can be adjusted and controlled through the timing function of the timing electromagnetic valve; resource waste is effectively reduced; and meanwhile, the ointment amount meets medical requirements.

The utility model provides a cutter grinding device of a cutting bed. The cutter grinding device comprises a cutter grinding sand column, a rotation driving member; a sliding part is connected to the sliding rail in a sliding mode, and the sliding part is connected with the rotary driving piece and the sharpening sand column; the buffering mechanism comprises a buffering shifting rod and a buffering seat plate connected with the sliding part, a guiding shaft and a buffering shaft which are parallel to each other are arranged in the buffering seat plate, and the buffering shaft is sleeved with a spring; a first open hole and a second open hole are formed in the buffer driving lever, and the first open hole is arranged on the guide shaft in a sleeving manner; the buffer shaft is sleeved with the second open hole. The buffer seat plate is further in threaded connection with an adjusting knob, one end of the spring abuts against the adjusting knob, and the other end of the spring abuts against the buffer deflector rod; and the output end of the linear displacement driving part is connected with the buffer shifting rod. The utility model further provides a cutting bed which comprises the cutter grinding device. The knife sharpener has the advantages that stable knife sharpening pressure is provided, and knife sharpening work data are more accurate.