A grinding fixture for engine casing

Abstract

The present invention relates to the technical field of grinding fixtures, and discloses an engine casing grinding fixture, including two rotating tight binding mechanisms and two unidirectional limiting mechanisms, wherein a triangular insertion structure fixedly mounted on the upper end surface of another No. 1 horizontal support base plate and capable of limiting the unidirectional rotation of the triangular tooth groove after being correspondingly inserted into the inside of the triangular tooth groove, and a No. 1 longitudinal movable rod capable of driving the triangular insertion structure to move longitudinally are arranged inside the engine casing grinding fixture. The engine casing grinding fixture uses a binding strap to bind and fix the engine body. Since the binding strap can produce adaptive deformation according to the shape of the engine, the usable range of the engine is increased. At the same time, since the binding strap has adaptive deformation, the area of ​​the binding part and the engine at the stress-bearing part can be increased, thereby reducing the unit stress pressure on the engine body when the engine is clamped, thereby reducing the negative impact of the clamping force on the engine.

Description

Technical Field

[0001] The invention relates to the technical field of grinding fixtures, in particular to a grinding fixture for an engine casing. Background Art

[0002] After die-casting, the surface of the engine casing is not smooth. Not only is there a lot of sand sticking to it, but there are also many burrs. Generally, the die-cast engine casing is first shot blasted, and then rough ground and fine ground. The current engine casing grinding device cannot fully clamp the engine casing during use, causing the engine casing to shake, resulting in excessive grinding or damage to the engine casing, causing economic losses.

[0003] To this end, the Chinese patent with the publication number "CN217833082U" announced an "engine casing polishing fixture", whose main structure includes an operating table, a first clamping device, a fixing device, a water supply device, a second clamping device and a spraying device. The top of the operating table is snap-connected with two groups of first clamping devices that are symmetrically distributed in parallel. The first clamping device is connected to the fixing device on both sides, and the top of the fixing device is connected and fixed to the top of the operating table by a fixing assembly. A water supply device is installed at the bottom of the operating table. The top of the fixing device is snap-connected with the second clamping device. A spraying device is provided on one side of the fixing device, and the spraying device is connected to the water supply device. The engine casing polishing fixture can clamp the engine casing, improve the stability of the engine casing, avoid the engine casing polishing fixture from being unstable, and easily causing the engine casing to fall off, and realize the cooling of the engine casing, and can make the polishing area smoother, improving the polishing quality.

[0004] However, when the engine casing grinding fixture is actually working, it uses an iron block-type clamp to perform a resistance clamping on the outer surface of the engine. On the one hand, the resistance clamping requires the clamped surface to be a flat structure, while the outer surface of the engine is basically a curved structure, which leads to relatively large limitations in its clamping. On the other hand, since the clamping surface is narrow and the contact surface between the clamping surfaces is also relatively narrow, the pressure on the engine per unit area is relatively large, which can easily cause deformation of the engine. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an engine casing polishing fixture, which utilizes straps to perform binding and fixing of the engine body. Since the straps can produce adaptive deformation according to the shape of the engine, the usable range of the engine is improved. At the same time, since the straps have adaptive deformation, the area of ​​the binding part and the engine at the stress-bearing part can be increased, thereby reducing the unit force pressure on the engine body when the engine is clamped, thereby reducing the negative impact of the clamping force on the engine, and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an engine casing polishing fixture, comprising a frame composed of two parallel No. 1 horizontal support base plates and two No. 2 horizontal support base plates, a vertical fixing plate fixedly mounted on the bottom ends of the two No. 2 horizontal support base plates, two component mounting notches arranged inside one of the No. 1 horizontal support base plates, and a vertical mounting plate fixedly mounted on the No. 1 horizontal support base plate at the bottom of the component mounting notch, and also comprising two rotating binding mechanisms, wherein a strap capable of being bound to the outer surface of the engine, a strap winding column fixedly mounted at one end of the strap and capable of winding and releasing the strap when rotating, and a triangular tooth groove rotating with the strap winding column are arranged inside; and two one-way limiting mechanisms, wherein a triangular insertion structure fixedly mounted on the upper end surface of the other No. 1 horizontal support base plate and capable of limiting the one-way rotation of the triangular tooth groove after being correspondingly inserted into the inside of the triangular tooth groove, and a No. 1 longitudinal movable rod capable of driving the triangular insertion structure to move longitudinally are arranged inside.

[0007] Preferably, the rotating tightening mechanism includes a strap winding column located above one of the No. 1 horizontal supporting base plates and capable of rotating, side protective plates integrally arranged at both ends of the strap winding column, a hexagonal protrusion structure integrally arranged on one end face of one of the side protective plates, a limiting rotating shaft integrally arranged on one end face of the other side protective plate, a special-shaped tooth structure integrally arranged on the shaft body of the limiting rotating shaft, a triangular tooth groove which is arranged on the circumferential surface of the special-shaped tooth structure and is a concave structure, a strap embedded in the circumferential surface of the strap winding column and capable of being bound to the outer surface of the engine, and the other end of the strap is fixedly embedded in a strap fixing head.

[0008] Preferably, one inner concave surface of the triangular tooth groove is an inclined surface structure, and the other inner concave surface is a straight surface structure pointing to the axis center line of the limiting rotating shaft.

[0009] Preferably, the binding strap is a belt-like structure woven from textile fabric.

[0010] Preferably, the one-way limiting mechanism includes a fixed base fixedly mounted on the upper end surface of a No. 1 horizontal supporting base, the upper end surface of the fixed base is provided with a fixed ring body with an integral structure therewith, the interior of the fixed ring body is provided with a central fixing hole with both ends being open, the fixing ring body is provided with a rotatable limiting rotating shaft installed inside the central fixing hole through a bearing, the top of the fixed ring body is provided with a No. 1 longitudinal hollow shell with an integral structure therewith, the interior of the No. 1 longitudinal hollow shell is provided with a No. 1 longitudinal component active cavity, the bottom end of the No. 1 longitudinal hollow shell is provided with a No. 1 component through-hole connecting the bottom end of the No. 1 longitudinal component active cavity and the central fixing hole, the top of the No. 1 longitudinal hollow shell is provided with a No. 2 component through-hole connecting the external space and the No. 1 longitudinal component active cavity, the No. 1 longitudinal hollow shell is provided with a No. 1 longitudinal component active cavity. An inner movable plate capable of axially moving along the movable cavity of the No. 1 longitudinal component is placed inside the movable cavity of the longitudinal component, and a No. 1 longitudinal movable rod penetrating the perforation of the No. 2 component is fixedly installed on the end face of the inner movable plate facing the perforation of the No. 2 component, and a No. 1 coil spring in a compressed state is sleeved on the outer periphery of the rod body of the No. 1 longitudinal movable rod located inside the movable cavity of the No. 1 longitudinal component, and the bottom end of the No. 1 coil spring abuts against the upper end face of the inner movable plate, and the top end of the No. 1 coil spring abuts against the top end of the movable cavity of the No. 1 longitudinal component, and a force plate is fixedly installed on the end of the No. 1 longitudinal hollow shell of the No. 1 longitudinal movable rod, and a rectangular limiting plate penetrating the perforation of the No. 1 component is fixedly installed on the end face of the inner movable plate facing the perforation of the No. 1 component, and a triangular insertion structure capable of being inserted into the triangular tooth groove is provided at the bottom end of the rectangular limiting plate.

[0011] Preferably, the structural shape of the rectangular limiting plate matches the structural shape of the triangular insertion structure.

[0012] Preferably, when the binding strap is rolled up, relative movement can occur between the triangular tooth groove and the triangular insertion structure; otherwise, the triangular tooth groove and the triangular insertion structure are in a stuck state.

[0013] Preferably, it also includes two elastic fastening mechanisms, inside which are provided a No. 2 longitudinal hollow shell which is installed between two vertical mounting plates through bearings and can rotate, a piston body which is located inside the No. 2 longitudinal hollow shell and moves downward after being pulled by the liquid and drives the strap to achieve a tightening effect, and a No. 2 coil spring which can reset the piston body upward and push the liquid back.

[0014] Preferably, the elastic fastening mechanism includes a No. 2 longitudinal hollow shell, the circumferential surface of the No. 2 longitudinal hollow shell is provided with two symmetrical and integrated rotating connecting shafts, the shaft bodies of the two rotating connecting shafts are installed inside two symmetrical vertical mounting plates through bearings, the interior of the No. 2 longitudinal hollow shell is provided with a No. 2 longitudinal component active cavity, the interior of the No. 2 longitudinal hollow shell is provided with a No. 3 component through-hole located at the top of the No. 2 longitudinal component active cavity, the interior of the No. 2 longitudinal hollow shell is provided with a liquid limiting flow cavity located at the top of the No. 3 component through-hole, the interior of the No. 2 longitudinal hollow shell is provided with a No. 4 component through-hole located at the top of the liquid limiting flow cavity, and the No. 2 longitudinal hollow shell is provided with a No. 4 component through-hole located at the top of the liquid limiting flow cavity. The circumferential surface of the shell is provided with a liquid docking channel connecting the external space and the liquid limiting flow cavity. The No. 2 longitudinal hollow shell is provided with a piston body capable of axially moving along the active cavity of the No. 2 longitudinal component inside the active cavity of the No. 2 longitudinal component. A No. 2 coil spring in a compressed state is provided at the bottom of the piston body. One end of the No. 2 coil spring abuts against the bottom end of the active cavity of the No. 2 longitudinal component, and the other end of the No. 2 coil spring abuts against the bottom surface of the piston body. A No. 2 longitudinal active rod is fixedly installed on the upper end surface of the piston body, which passes through the through hole of the No. 3 component, the liquid limiting flow cavity and the through hole of the No. 4 component in sequence. The top end of the No. 2 longitudinal active rod is fixedly connected to the bottom end of the strap fixing head.

[0015] Preferably, the structural radius of the perforation of the third component is greater than the structural radius of the second longitudinal movable rod.

[0016] Compared with the prior art, the present invention provides an engine casing grinding fixture, which has the following beneficial effects:

[0017] 1. Use straps to fix the engine body in a binding manner. Since the straps can produce adaptive deformation according to the shape of the engine, the usable range of the engine is increased. At the same time, since the straps have adaptive deformation, the area of ​​the binding part and the engine at the stress-bearing part can be increased, thereby reducing the unit force pressure on the engine body when clamping the engine, thereby reducing the negative impact of the clamping force on the engine.

[0018] 2. By setting up a rotating tightening mechanism and reciprocating the hexagonal protrusion structure, the strap winding column can be rotated in a directional manner. At this time, part of the strap structure will be wound on the outer circumference of the strap winding column, so that the strap is tightly bound to the surface of the engine body, thereby achieving binding fixation of the engine body.

[0019] 3. By setting a one-way limiting mechanism, when the strap is reeled in, the strap reeling column can rotate normally. When the strap wants to be released due to resistance during the tightening process, the triangular tooth groove and the triangular insertion structure are stuck, thereby preventing the strap from being released, thereby realizing one-way reeling of the strap. After the work is completed, the force plate is pulled upward to drive the triangular insertion structure to disengage from the triangular tooth groove. At this time, the strap reeling column can rotate freely, thereby releasing the strap and releasing the engine from the binding state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 It is a three-dimensional cross-sectional view of the present invention at the main viewing angle;

[0022] Figure 3 It is a three-dimensional cross-sectional view of the present invention from a right perspective;

[0023] Figure 4 It is a three-dimensional diagram of the rotary binding mechanism of the present invention;

[0024] Figure 5 It is a cross-sectional view of the rotary binding mechanism in the present invention at the structure of the special-shaped teeth;

[0025] Figure 6 It is a three-dimensional cross-sectional view of the one-way limiting mechanism in the present invention;

[0026] Figure 7 It is an assembly diagram of the one-way limiting mechanism in the present invention at the rectangular limiting plate;

[0027] Figure 8 It is a three-dimensional cross-sectional view of the elastic fastening mechanism in the present invention.

[0028] Among them: 1. No. 1 horizontal support base plate; 2. No. 2 horizontal support base plate; 3. Vertical fixed plate; 4. Component installation notch; 5. Vertical installation plate; 6. Rotating tight binding mechanism; 61. Binding strap reel column; 62. Side protection plate; 63. Hexagonal protrusion structure; 64. Limiting rotating shaft; 65. Special-shaped tooth structure; 66. Triangular tooth groove; 67. Binding strap fixing head; 68. Binding strap; 7. One-way limiting mechanism; 71. Fixed base; 72. Fixed ring body; 73. Central fixing hole; 74. No. 1 longitudinal hollow shell; 75. No. 1 longitudinal component movable cavity; 76. Perforation of component No. 1; 77. Perforation of component No. 2; 78. Inner movable plate; 79. Longitudinal movable rod No. 1; 710. Force plate; 711. Helical spring No. 1; 712. Rectangular limiting plate; 713. Triangular insertion structure; 8. Elastic fastening mechanism; 81. Longitudinal hollow shell No. 2; 82. Rotating connecting shaft; 83. Active cavity of longitudinal component No. 2; 84. Perforation of component No. 3; 85. Piston body; 86. Helical spring No. 2; 87. Liquid limiting flow cavity; 88. Perforation of component No. 4; 89. Liquid docking channel; 810. Longitudinal movable rod No. 2. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1 , Figure 2 and Figure 3 A grinding fixture for an engine casing comprises a frame consisting of two parallel No. 1 horizontal support base plates 1 and two No. 2 horizontal support base plates 2, a vertical fixing plate 3 fixedly mounted on the bottom ends of the two No. 2 horizontal support base plates 2, two component mounting notches 4 arranged inside one of the No. 1 horizontal support base plates 1, and a vertical mounting plate 5 fixedly mounted on the No. 1 horizontal support base plate 1 at the bottom of the component mounting notch 4. The vertical fixing plate 3 is correspondingly connected to a control device capable of driving the device to rotate, and then the bottom of the engine is placed on the upper surface of the frame. During operation, the control device can be manipulated to drive the device to rotate at an angle, thereby realizing corresponding processing of the engine body.

[0031] To achieve the bundling of the engine to the fuselage, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, it is necessary to set up two rotating tightening mechanisms 6, which are provided with a strap 68 that can be bound to the outer surface of the engine, a strap winding column 61 fixedly installed at one end of the strap 68 and capable of winding and releasing the strap 68 when rotating, and a triangular tooth groove 66 that rotates with the strap winding column 61. Through the hexagonal wrench socket, it is stuck on the periphery of the hexagonal protrusion structure 63, and then, the hexagonal protrusion structure 63 is reciprocated to make the strap winding column 61 rotate in a directional manner. At this time, part of the structure of the strap 68 will be wound on the outer circumferential surface of the strap winding column 61, so that the strap 68 is tightly bound to the surface of the engine body, thereby realizing the binding fixation of the engine body.

[0032] For the specific structure of the rotating binding mechanism 6, please refer to Figure 4 and Figure 5 , including a strap winding column 61 located above one of the first horizontal support base plates 1 and capable of rotation, side protection plates 62 integrally arranged at both ends of the strap winding column 61, a hexagonal protrusion structure 63 integrally arranged on one end surface of one of the side protection plates 62, a limited rotation shaft 64 integrally arranged on one end surface of the other side protection plate 62, a special-shaped tooth structure 65 integrally arranged on the shaft body of the limited rotation shaft 64, and a concave structure arranged on the circumferential surface of the special-shaped tooth structure 65 The triangular tooth groove 66, in order to realize the one-way limiting function, needs to make one inner concave surface of the triangular tooth groove 66 a slope structure, and the other inner concave surface a straight surface structure pointing to the axial center line of the limiting rotating shaft 64. The strap 68 embedded in the inner circumferential surface of the strap winding column 61 and capable of being bound to the outer surface of the engine needs to be a belt structure woven from textile fabric in order to have deformation ability. The other end of the strap 68 is fixedly embedded in a strap fixing head 67.

[0033] In order to realize the one-way winding and releasing function of the strap 68, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7, it is necessary to set up two one-way limiting mechanisms 7, which are provided with a triangular insertion structure 713 fixedly mounted on the upper end surface of another No. 1 horizontal supporting base plate 1 and capable of limiting the one-way rotation of the triangular tooth groove 66 after being correspondingly inserted into the triangular tooth groove 66, and a No. 1 longitudinal movable rod 79 capable of driving the triangular insertion structure 713 to move longitudinally. When the strap winding column 61 rotates, it will drive the limiting rotating shaft 64 to rotate, and at the same time drive the special-shaped tooth structure 65 to rotate. Since the structural shape of the rectangular limiting plate 712 matches the structural shape of the triangular insertion structure 713, and when the strap 68 is wound, the triangular tooth groove 66 and the triangular insertion structure 713 can be moved between them. Relative movement occurs; on the contrary, the triangular tooth groove 66 and the triangular insertion structure 713 are in a stuck state. Therefore, when the strap 68 is rolled up, the strap winding column 61 can rotate normally, and when the strap 68 wants to be released due to resistance during the tightening process, the triangular tooth groove 66 and the triangular insertion structure 713 are in a stuck state, thereby preventing the strap 68 from being released, thereby realizing the one-way winding of the strap 68. After the work is completed, the force plate 710 is pulled upward to drive the triangular insertion structure 713 to disengage from the triangular tooth groove 66. At this time, the strap winding column 61 can rotate freely, thereby realizing the release of the strap 68 and releasing the binding state of the engine.

[0034] For the specific structure of the one-way limiting mechanism 7, please refer to Figure 6 and Figure 7, including a fixed base 71 fixedly mounted on the upper end surface of the No. 1 horizontal supporting substrate 1, the upper end surface of the fixed base 71 is provided with a fixed ring body 72 with an integral structure therewith, the interior of the fixed ring body 72 is provided with a central fixing hole 73 with both ends being open, the fixed ring body 72 is provided with a rotatable limited rotating shaft 64 through a bearing inside the central fixing hole 73, the top of the fixed ring body 72 is provided with a No. 1 longitudinal hollow shell 74 with an integral structure therewith, the interior of the No. 1 longitudinal hollow shell 74 is provided with a No. 1 longitudinal component active cavity 75, the bottom end of the No. 1 longitudinal hollow shell 74 is provided with a No. 1 component through-hole 76 connecting the bottom end of the No. 1 longitudinal component active cavity 75 and the central fixing hole 73, the top of the No. 1 longitudinal hollow shell 74 is provided with a No. 2 component through-hole 77 connecting the external space and the No. 1 longitudinal component active cavity 75, the No. 1 longitudinal hollow shell 74 is provided with a No. 2 longitudinal component active cavity 75. An inner movable plate 78 capable of axially moving along the movable cavity 75 of the No. 1 longitudinal component is provided, and a No. 1 longitudinal movable rod 79 penetrating the No. 2 component through-hole 77 is fixedly installed on the end face of the inner movable plate 78 facing the No. 2 component through-hole 77, and a No. 1 coil spring 711 in a compressed state is placed on the outer periphery of the rod body of the No. 1 longitudinal movable rod 79 located inside the movable cavity 75 of the No. 1 longitudinal component, and the bottom end of the No. 1 coil spring 711 abuts against the upper end face of the inner movable plate 78, so that The top end of the No. 1 coil spring 711 abuts against the top end of the No. 1 longitudinal component movable cavity 75, and the No. 1 longitudinal movable rod 79 is fixedly installed with a force plate 710 at one end located outside the No. 1 longitudinal hollow shell 74, and the inner movable plate 78 is fixedly installed with a rectangular limiting plate 712 that passes through the No. 1 component through-hole 76 at the end face facing the No. 1 component through-hole 76, and the bottom end of the rectangular limiting plate 712 is provided with a triangular insertion structure 713 that can be inserted into the triangular tooth groove 66.

[0035] In order to compensate for the looseness of the strap 68 caused by the undefined area between the two triangular tooth grooves 66, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 8, it is necessary to set up two elastic fastening mechanisms 8, inside which are provided a No. 2 longitudinal hollow shell 81 which is installed between the two vertical mounting plates 5 through a bearing and can rotate, a piston body 85 which is located inside the No. 2 longitudinal hollow shell 81 and moves downward after being pulled by the liquid, and drives the strap 68 to achieve a tightening effect, and a No. 2 coil spring 86 which can reset the piston body 85 upward and push the liquid to flow back. It is used in conjunction with a hydraulic device, and the liquid circuit of the hydraulic device and the liquid docking channel 89 are docked. The hydraulic device is started, and the liquid enters the interior of the No. 2 longitudinal component active cavity 83. Under the action of the liquid pressure, the piston body 85 will move downward and compress the No. 2 coil spring 86, while driving one end of the strap 68 to move, so that the strap 68 pre-tightens the engine body, thereby compensating for the loosening of the strap 68 caused by the unrestricted area between the two triangular tooth grooves 66.

[0036] For the specific structure of the elastic fastening mechanism 8, please refer to Figure 8 , including a No. 2 longitudinal hollow shell 81, the circumferential surface of the No. 2 longitudinal hollow shell 81 is provided with two symmetrical and integrated rotating connecting shafts 82, the shaft bodies of the two rotating connecting shafts 82 are installed inside two symmetrical vertical mounting plates 5 through bearings, the interior of the No. 2 longitudinal hollow shell 81 is provided with a No. 2 longitudinal component active cavity 83, the interior of the No. 2 longitudinal hollow shell 81 is provided with a No. 3 component through-hole 84 located at the top of the No. 2 longitudinal component active cavity 83, the interior of the No. 2 longitudinal hollow shell 81 is provided with a liquid limiting flow cavity 87 located at the top of the No. 3 component through-hole 84, the interior of the No. 2 longitudinal hollow shell 81 is provided with a No. 4 component through-hole 88 located at the top of the liquid limiting flow cavity 87, and the circumferential surface of the No. 2 longitudinal hollow shell 81 is provided with a liquid docking channel 89 connecting the external space and the liquid limiting flow cavity 87 The No. 2 longitudinal hollow shell 81 is provided with a piston body 85 capable of axially moving along the No. 2 longitudinal component active cavity 83 inside the No. 2 longitudinal component active cavity 83, and a No. 2 coil spring 86 in a compressed state is provided at the bottom of the piston body 85, one end of the No. 2 coil spring 86 abuts against the bottom end of the No. 2 longitudinal component active cavity 83, and the other end of the No. 2 coil spring 86 abuts against the bottom surface of the piston body 85, and the upper end surface of the piston body 85 is fixedly installed with a No. 2 longitudinal movable rod 810 which passes through the No. 3 component through-hole 84, the liquid limiting flow cavity 87 and the No. 4 component through-hole 88 in sequence. In order to realize the normal flow of liquid, it is necessary to make the structural radius of the No. 3 component through-hole 84 larger than the structural radius of the No. 2 longitudinal movable rod 810, and the top end of the No. 2 longitudinal movable rod 810 is fixedly connected to the bottom end of the strap fixing head 67.

[0037] The specific working principle of the present invention is to connect the vertical fixing plate 3 to the control device capable of driving the device to rotate, and then place the bottom of the engine on the upper surface of the frame, and clamp the outer periphery of the hexagonal protrusion structure 63 through the hexagonal wrench sleeve, and then reciprocate the hexagonal protrusion structure 63 to make the strap winding column 61 rotate in a directional manner. At this time, part of the structure of the strap 68 will be wound on the outer circumference of the strap winding column 61, so that the strap 68 is tightly bound to the fuselage surface of the engine;

[0038] Used in conjunction with a hydraulic device, and the liquid circuit of the hydraulic device is connected to the liquid connection channel 89, the hydraulic device is started, and the liquid enters the interior of the movable chamber 83 of the second longitudinal component. Under the action of the liquid pressure, the piston body 85 moves downward, and the second coil spring 86 is compressed, and at the same time, one end of the strap 68 is driven to move, so that the strap 68 performs a pre-tightening function on the engine body;

[0039] During the working process, the control device can be manipulated to drive the device to rotate at an angle, thereby realizing corresponding processing on the engine body;

[0040] When the work is completed, the hydraulic equipment is controlled to allow the liquid to flow back, and then the force plate 710 is pulled upward to drive the triangular insertion structure 713 to disengage from the triangular tooth groove 66. At this time, the strap winding column 61 can rotate freely, thereby releasing the strap 68 and releasing the binding state of the engine.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An engine casing polishing fixture, comprising a frame consisting of two parallel No. 1 horizontal support base plates (1) and two No. 2 horizontal support base plates (2), a vertical fixing plate (3) fixedly mounted on the bottom ends of the two No. 2 horizontal support base plates (2), two component mounting notches (4) arranged inside one of the No. 1 horizontal support base plates (1), and a vertical mounting plate (5) fixedly mounted on the No. 1 horizontal support base plate (1) at the bottom of the component mounting notches (4), characterized in that: Also includes, Two rotating fastening mechanisms (6), each of which is provided with a strap (68) capable of being fastened to the outer surface of the engine, a strap reeling column (61) fixedly mounted on one end of the strap (68) and capable of reeling in and releasing the strap (68) when rotating, and a triangular tooth groove (66) that rotates with the strap reeling column (61); and two one-way limiting mechanisms (7), wherein a triangular insertion structure (713) is fixedly mounted on the upper end surface of another first horizontal support base plate (1) and can limit the one-way rotation of the triangular tooth groove (66) after being correspondingly inserted into the inside of the triangular tooth groove (66), and a first longitudinal movable rod (79) can drive the triangular insertion structure (713) to move longitudinally; The rotating tightening mechanism (6) comprises a strap winding column (61) which is located above one of the first horizontal support base plates (1) and is capable of rotating, side protection plates (62) integrally arranged at both ends of the strap winding column (61), a hexagonal protrusion structure (63) integrally arranged at one end surface of one of the side protection plates (62), a position-limiting rotating shaft (64) integrally arranged at one end surface of the other side protection plate (62), a special-shaped tooth structure (65) integrally arranged on the shaft body of the position-limiting rotating shaft (64), a triangular tooth groove (66) which is arranged on the circumferential surface of the special-shaped tooth structure (65) and is a concave structure, and a strap (68) which is embedded in the circumferential surface of the strap winding column (61) and can be bound to the outer surface of the engine, and the other end of the strap (68) is fixedly embedded in the interior of a strap fixing head (67); The one-way limiting mechanism (7) comprises a fixed base (71) fixedly mounted on the upper end surface of a first horizontal support base plate (1); the upper end surface of the fixed base (71) is provided with a fixed ring body (72) integrally formed with the fixed base; a central fixing hole (73) with both ends open is provided inside the fixed ring body (72); a rotatable limiting rotating shaft (64) is installed inside the fixed ring body (72) via a bearing in the central fixing hole (73); a first longitudinal axis (64) integrally formed with the fixed ring body (72) is provided on the top of the fixed ring body (72); The first longitudinal hollow shell (74) is provided with a first longitudinal component active cavity (75) inside, the first longitudinal hollow shell (74) is provided with a first component through hole (76) at the bottom end thereof connecting the bottom end of the first longitudinal component active cavity (75) and the central fixing hole (73), the first longitudinal hollow shell (74) is provided with a second component through hole (77) connecting the external space and the first longitudinal component active cavity (75) at the top end thereof, and the first longitudinal hollow shell (74) is provided with a second component through hole (77) at the top end thereof connecting the external space and the first longitudinal component active cavity (75). An inner movable plate (78) capable of axially moving along the movable cavity (75) of the first longitudinal component is arranged inside the inner movable plate (78), a first longitudinal movable rod (79) penetrating the through hole (77) of the second component is fixedly installed on the end surface of the inner movable plate (78) facing the through hole (77) of the second component, a first longitudinal movable rod (79) in a compressed state is sleeved on the outer periphery of the rod body of the first longitudinal movable rod (79) located inside the movable cavity (75) of the first longitudinal component, and the bottom end of the first coil spring (711) abuts against the upper end surface of the inner movable plate (78), The top end of the No. 1 coil spring (711) abuts against the top end of the No. 1 longitudinal component movable cavity (75); the No. 1 longitudinal movable rod (79) is fixedly mounted with a force plate (710) at one end located outside the No. 1 longitudinal hollow shell (74); the inner movable plate (78) is fixedly mounted with a rectangular limit plate (712) penetrating the No. 1 component through-hole (76) at the end surface facing the No. 1 component through-hole (76); the bottom end of the rectangular limit plate (712) is provided with a triangular insertion structure (713) capable of being inserted into the triangular tooth groove (66); It also includes two elastic fastening mechanisms (8), which are provided with a second longitudinal hollow housing (81) which is mounted between two vertical mounting plates (5) via a bearing and is rotatable, a piston body (85) which is located inside the second longitudinal hollow housing (81) and moves downward after being pulled by the liquid and drives the strap (68) to achieve a tightening effect, and a second coil spring (86) which can reset the piston body (85) upward and push the liquid back. The elastic fastening mechanism (8) comprises a second longitudinal hollow shell (81), the circumferential surface of the second longitudinal hollow shell (81) is provided with two symmetrical and integrally structured rotating connecting shafts (82), the shaft bodies of the two rotating connecting shafts (82) are mounted inside two symmetrical vertical mounting plates (5) via bearings, the interior of the second longitudinal hollow shell (81) is provided with a second longitudinal component movable cavity (83), the interior of the second longitudinal hollow shell (81) is provided with a third component through-hole (84) located at the top of the second longitudinal component movable cavity (83), the interior of the second longitudinal hollow shell (81) is provided with a liquid limiting flow cavity (87) located at the top of the third component through-hole (84), the interior of the second longitudinal hollow shell (81) is provided with a fourth component through-hole (88) located at the top of the liquid limiting flow cavity (87), and the circumferential surface of the second longitudinal hollow shell (81) is provided with a plurality of symmetrical ... A liquid docking passage (89) is provided for connecting the external space and the liquid limiting flow chamber (87); a piston body (85) capable of axially moving along the No. 2 longitudinal component active chamber (83) is arranged in the No. 2 longitudinal hollow shell (81) located inside the No. 2 longitudinal component active chamber (83); a No. 2 coil spring (86) in a compressed state is arranged at the bottom of the piston body (85); one end of the No. 2 coil spring (86) abuts against the bottom end of the No. 2 longitudinal component active chamber (83); the other end of the No. 2 coil spring (86) abuts against the bottom surface of the piston body (85); a No. 2 longitudinal movable rod (810) is fixedly installed on the upper end surface of the piston body (85) and passes through the No. 3 component through hole (84), the liquid limiting flow chamber (87) and the No. 4 component through hole (88) in sequence; the top end of the No. 2 longitudinal movable rod (810) is fixedly connected to the bottom end of the strap fixing head (67).

2. The engine casing grinding fixture according to claim 1, characterized in that: One inner concave surface of the triangular tooth groove (66) is an inclined surface structure, and the other inner concave surface is a straight surface structure pointing to the axis center line of the position-limiting rotating shaft (64).

3. The engine casing grinding fixture according to claim 1, characterized in that: The binding belt (68) is a belt-shaped structure woven from textile fabric.

4. The engine casing grinding fixture according to claim 1, characterized in that: The structural shape of the rectangular limiting plate (712) matches the structural shape of the triangular insertion structure (713).

5. The engine casing grinding fixture according to claim 1, characterized in that: When the binding belt (68) is rolled up, relative movement can occur between the triangular tooth groove (66) and the triangular insertion structure (713); conversely, the triangular tooth groove (66) and the triangular insertion structure (713) are in a stuck state.

6. The engine casing grinding fixture according to claim 1, characterized in that: The structural radius of the through hole (84) of the third component is greater than the structural radius of the second longitudinal movable rod (810).

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