An internal combustion engine connecting rod finishing equipment

Abstract

A finishing device for connecting rods of internal combustion engines belongs to the technical field of connecting rod processing equipment of internal combustion engines. The lower end of the transmission group is provided with multiple sets of clamp groups, and the lower end of the transmission group is fixedly connected to the sand box group, and the multiple sets of clamp groups are all arranged in the sand box group; the sand box group is arranged on the base group, and the upper end of the base group is connected to the transmission group. The present invention realizes the synchronous finishing processing of multiple connecting rods. When working, the connecting rod rotates around the output shaft of the planetary gear, and at the same time revolves around the lower rotary shaft of the gear box in the sand box. A certain relative motion speed is generated between the abrasive particles and the surface of the connecting rod, and the abrasive particles generate a certain force on the surface of the workpiece. Under the action of force and relative motion, the free abrasive particles will produce a certain amount of collision, rolling, sliding and scratching on the surface of the workpiece. The micro-grinding effect, thereby realizing the finishing processing of the connecting rod surface, improving its surface quality, and improving the surface physical and mechanical properties, filling the industry gap in the finishing processing of connecting rods of internal combustion engines.

Description

Technical Field

[0001] The invention relates to an internal combustion engine connecting rod finishing device, belonging to the technical field of internal combustion engine connecting rod processing equipment. Background Art

[0002] After machining, the surface of the parts will leave different degrees of roughness and various defects, such as uneven surface, broken edges, burrs, bumps and scratches, micro cracks, etc. This not only affects the quality of the parts themselves, but also affects the assembly accuracy, performance and service life of the whole product.

[0003] In the machining process, various processing methods and processing technologies whose main purpose is to improve the surface quality of parts are called finishing processing technologies. Finishing processing technologies are mainly achieved through grinding and polishing.

[0004] After the parts are cut, the edges are rounded, burrs are removed, micro cracks are eliminated, surface roughness is refined, and physical and mechanical properties are improved. This is called the final surface finishing technology of the parts, also known as precision surface finishing technology.

[0005] As one of the core parts of the engine, the machining accuracy and surface quality of the connecting rod of the internal combustion engine have a great impact on its use. Most of the blanks are forgings or castings, and the blank parts have poor brightness, which is easy to leave the original defects of the blank and affect the final cleanliness of the parts; the purpose of the connecting rod finishing is to comprehensively improve the surface appearance quality of the connecting rod, improve the physical and mechanical properties, reduce the surface roughness value, and increase the surface hardness and wear resistance, thereby increasing the service life of the engine.

[0006] Existing finishing processes for connecting rods are mostly manual polishing, which has low efficiency, high work intensity and poor working environment. When the connecting rod blanks are shot peened or sand treated, sand blowing of the finished product cannot be achieved, and the overall cleanliness and strength cannot be improved. Moreover, existing finishing equipment mostly performs finishing on a certain part of a single part, and cannot achieve automatic finishing of all parts of multiple connecting rods. Summary of the invention

[0007] In order to solve the problems existing in the background technology, the present invention provides a connecting rod finishing device for an internal combustion engine.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an internal combustion engine connecting rod finishing equipment, including a transmission group, multiple sets of clamp groups, a sand box group and a base group; the lower end of the transmission group is provided with multiple sets of clamp groups, and the lower end of the transmission group is fixedly connected to the sand box group, and the multiple sets of clamp groups are all arranged in the sand box group; the sand box group is arranged on the base group, and the upper end of the base group is connected to the transmission group.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The present invention realizes the synchronous finishing of multiple connecting rods. When working, the connecting rod rotates around the output shaft of the planetary gear and revolves around the lower rotary shaft of the gear box in the sandbox. The abrasive grains and the connecting rod surface generate a certain relative motion speed, and the abrasive grains generate a certain force on the workpiece surface. Under the action of force and relative motion, the free abrasive grains will produce a certain amount of collision, rolling, sliding and scratching on the workpiece surface, thereby realizing the finishing of the connecting rod surface, improving its surface quality, improving the surface physical and mechanical properties, and filling the industry gap in the finishing of the connecting rod of the internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention;

[0012] Figure 2 It is a top view of the transmission group;

[0013] Figure 3 yes Figure 2 AA section view;

[0014] Figure 4 is a structural schematic diagram of the fixture group;

[0015] Figure 5 It is a structural schematic diagram of the sand box group;

[0016] Figure 6 yes Figure 5 A magnified view of point B;

[0017] Figure 7 is a structural schematic diagram of the base group;

[0018] Figure 8 yes Figure 7 Top view of the . DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] An internal combustion engine connecting rod finishing equipment comprises a transmission group, multiple sets of fixture groups, a sand box group and a base group; the lower end of the transmission group is provided with multiple sets of fixture groups, and the lower end of the transmission group is fixedly connected to the sand box group, and the multiple sets of fixture groups are all arranged in the sand box group; the sand box group is arranged on the base group, and the upper end of the base group is connected to the transmission group.

[0021] The transmission group includes a main transmission shaft 1 9, a main transmission shaft 2 10, a gearbox connecting shaft 11, an outer shell 14, a revolving motor 19, a main motor 26, a main gear 33, a gearbox 38 and a plurality of planetary gears 37;

[0022] The main motor 26 and the revolving motor 19 are both fixed on the outer shell 14. The main motor 26 is a main motion rotating frequency conversion motor, which is installed on the outer shell 14 through the main motor reducer seat. The revolving motor 19 is fixed to the corresponding motor seat by bolts, and its motor seat is fixed to the outer shell 14 by bolts. The output shaft of the main motor 26 transmits power to the main transmission shaft 2 10 through a transmission sleeve. The lower end of the main transmission shaft 2 10 is coaxially fixedly connected with the main transmission shaft 1 9. Specifically, the lower end of the main transmission shaft 2 10 is inserted into the upper end of the main transmission shaft 1 9, and the flange part of the lower end of the main transmission shaft 2 10 is connected to the main transmission shaft 1 9 by bolts. The upper end of the outer side of the main transmission shaft 10 is rotatably connected to the gear box connecting shaft 11 through a GB / T276-1994 deep groove ball bearing, and the lower end of the outer side of the main transmission shaft 10 is rotatably connected to the upper cover of the gear box 38 through a GB / T276-1994 deep groove ball bearing; the outer side of the main transmission shaft 9 is coaxially fixed with a main gear 33, specifically: the flange part of the main transmission shaft 9 is fixedly connected to the main gear 33 by bolts, and the lower end of the main transmission shaft 9 is connected to the gear The bottom plate of the gear box 38 is rotatably connected, specifically: the lower part of the main transmission shaft 9 flange is connected to the main bearing seat of the gear box body through the GB / T297-1994 tapered roller bearing and the GB / T276-1994 deep groove ball bearing, the main bearing seat of the gear box body is connected and fixed with the gear box body 38 by the hexagon socket head screw M16X40, and the lower end of the main transmission shaft 9 is locked with the inner ring of the GB / T276-1994 deep groove ball bearing through the flat washer and the M160X3 locking nut.

[0023] The revolving motor 19 is connected to the gearbox connecting shaft 11 by transmission, specifically: the revolving motor 19 is provided with a sprocket 2 at the lower end, the sprocket 2 transmits power to the sprocket 1 through the chain 17, the sprocket 1 is installed on the sprocket 1 shaft by bolts, the sprocket 1 shaft is matched with the gearbox connecting shaft 11 through the GB / T1095-2003 common flat key b28X50, and drives the gearbox connecting shaft 11 to rotate; and the gearbox connecting shaft 11 has a threaded structure at the upper end, and the sprocket 1 shaft is locked by using a flat washer with an inner diameter of 280 and a locking nut with an M280 inner diameter;

[0024] The gearbox connecting shaft 11 is rotatably arranged in the outer shell 14, specifically: the upper end of the gearbox connecting shaft 11 is matched with the outer shell 14 through a GB / T276-1994 deep groove ball bearing; the middle part of the gearbox connecting shaft 11 is matched with the outer shell 14 through a double-row tapered roller bearing; the lower end of the outer shell 14 is installed with a sealing cover 1, and the sealing cover 1 is installed with a GB / T3452.1-2005 O-ring to seal with the gearbox connecting shaft 11;

[0025] The lower end of the gear box connecting shaft 11 is fixedly connected to the gear box 38 , and the gear box connecting shaft 11 drives the gear 38 to rotate as a whole.

[0026] A plurality of planetary gears 37 are rotatably disposed in the gear box 38 , and the plurality of planetary gears 37 are all meshed and connected with the main gear 33 for power transmission.

[0027] Specifically, the six planetary gears 37 are fastened to the planetary gear shaft with bolts, the upper end of the planetary gear shaft is connected to the upper cover of the gear box 38 through the GB / T276-1994 deep groove ball bearing, and the upper cover of the gear box 38 is equipped with six planetary bearing covers to fix the GB / T276-1994 deep groove ball bearing; the lower end of the flange edge of the planetary gear shaft is connected to the planetary gear bearing seat through the GB / T297-1994 tapered roller bearing, the lower end of the planetary gear shaft is locked with the GB / 858-76 retaining washer and the GB / T812-76M115 round nut, the planetary gear bearing seat and the gear box body 38 are connected with bolts, and the lower end of the planetary gear bearing seat is connected to two sealing covers to fix the GB / T297-1994 tapered roller bearing, and at the same time, the GB / T3452.1-2005 O-ring is assembled to seal with the planetary gear shaft to ensure the cleanliness of the bearing.

[0028] The gearbox 38 includes a box body and a box cover connected by bolts, and the box body and the box cover are positioned by pins. A plurality of main support bolts 8 are provided between the box cover and the box body, and each of the main support bolts 8 is connected to the box cover and the box body through a corresponding main support nut 3, so that the gearbox 38 is more stable.

[0029] Each set of the clamp assembly includes a lower clamp base plate 48, a lower clamp support plate 49, a positioning pin 50, a cam 53, an upper clamp base plate 56, an upper clamp support plate 57, a fastening nut 58, a planetary gear output shaft 59 and a cam shaft 65;

[0030] The upper end of the planetary gear output shaft 59 is fixedly connected with the planetary gear shaft of the corresponding planetary gear 37 by bolts. The outer side of the planetary gear output shaft 59 is sequentially provided with a fastening nut 58, an upper fixture bottom plate 56 and a lower fixture bottom plate 48 from top to bottom. The upper fixture bottom plate 56 and the planetary gear output shaft 59 are connected by a common flat key B28X110 of GB / T1095-2003. The upper fixture bottom plate 56 is threadedly locked with the planetary gear output shaft 59 by the fastening nut 58. Specifically, the planetary gear output shaft A threaded structure is provided at the upper end of 59, and the threaded structure is threadedly connected with the fastening nut 58, and the upper fixture support plate 57 is fixedly sleeved on the outer side of the upper fixture bottom plate 56 by bolts, and the lower fixture support plate 49 is fixedly sleeved on the outer side of the lower fixture bottom plate 48 by using GB / T70.1-2008 hexagon socket head screw M10X35, and the upper fixture support plate 57 and the lower fixture support plate 49 are provided with a plurality of positioning pins 50 arranged one by one on the opposite surfaces; the positioning pins 50 are matched with the connecting rod fixing holes to be polished;

[0031] A camshaft 65 is vertically rotatably inserted in the middle of the planetary gear output shaft 59, and cams 53 are fixedly mounted on both ends of the camshaft 65. Specifically, the camshaft 65 passes through the hole in the middle of the planetary gear output shaft 59, and the bearings are pressed and fixed by the planetary gear output shaft bearing cover plate through GB / T70.1-2008 hexagon socket head screws M12X10 on both sides. At the same time, a GBT3452.1-82 O-ring is installed in the inner hole of the planetary gear output shaft bearing cover plate to cooperate with the cam and the outer diameter of the bearing spacer sleeve to seal the internal bearing. The cam 53 is matched with the camshaft 65 through the GB / T1095-2003 common flat key B6X16, and the two sides of the cam 53 are locked with GB / T95-7618 washers and GB / T810-76 M18 locking nuts respectively. The inner side of the cam 53 and the cam are matched with the bearing spacer sleeve, GB / T292-2007 angular contact ball bearing and the planetary gear output shaft 59; the two cams 53 are both set in cooperation with the upper fixture bottom plate 56.

[0032] The upper end of the fastening nut 58 is provided with a locking nut 60 which is threadedly connected to the planetary gear output shaft 59 to prevent the fastening nut 58 from rotating and causing the polished rod to fall off.

[0033] The fastening nut 58 is provided with a handle 61 for facilitating operation of twisting the fastening nut 58 .

[0034] When the fastening nut 58 rotates upward, the clamping force on the upper fixture bottom plate 56 is released. At this time, the camshaft 65 is rotated by a wrench to drive the cam 53 to rotate. When the cam of the cam 53 rotates to the high point position, the upper fixture bottom plate 56 rises. After the upper fixture bottom plate 56 rises, the connecting rod to be finished can be installed on the lower fixture support plate 49 and the upper fixture support plate 57, and positioned with the positioning pin 50. Then the camshaft 65 is rotated again to lower the upper fixture support plate 57 and the upper fixture bottom plate 56, so that the connecting rod to be polished is pressed, and the positioning pin 50 installed on the upper fixture support plate 57 is positioned at the same time. At this time, the fastening nut 58 is rotated downward to apply a clamping force to the upper fixture bottom plate 56, and the locking nut 60 is tightened to clamp the connecting rod firmly.

[0035] The sand box assembly includes a sand box seat 72, a sand box body 73, a coupling body 74, a long key 82, a lower rotating shaft 83 of the gear box, a cooling water nozzle fulcrum 88, a liquid return mask 91, a sand box liquid outlet pipe 92 and a rubber sealing ring 93;

[0036] The upper end of the lower rotating shaft 83 of the gear box is fixedly connected with the lower end of the middle part of the gear box 38 by bolts. The outer wall of the lower rotating shaft 83 of the gear box is provided with a long key 82 along its axial direction. The long key 82 has a guiding effect on sliding. The outer sliding sleeve of the lower rotating shaft 83 of the gear box is provided with a coupling body 74. The lower rotating shaft 83 of the gear box is rotatably connected with the coupling body 74. Specifically, the inner circle of the bearing sleeve is slidably connected with the long key 82, the outer circle of the bearing sleeve is matched with the GB / T288-1994 spherical roller bearing, and a flat washer and a GB / T858-76 stop washer are installed at the thread of the lower end of the bearing sleeve. The outer circle of the GB / T288-1994 spherical roller bearing is installed on the bearing sleeve housing, and the upper end is pressed by the upper cover of the bearing sleeve housing, and is locked with the GB / T70.1-2000 hexagon socket round head screw Ⅰ M10% x20. The lower end of the bearing sleeve housing is connected to the coupling body 74 and is locked with the GB / T70.1-2000 hexagon socket round head screw Ⅲ M10% x35.

[0037] The coupling body 74 is arranged in the sand box body 73, and the lower end of the parallel coupling body 74 is fixedly connected to the sand box seat 72 by a GB / T70.1-2000 hexagon socket round head screw IV M14% x40, and the upper end of the sand box seat 72 is fixedly connected to the sand box body 73 by a GB / T70.1-2000 hexagon socket round head screw V M14% x35. A liquid return mask 91 is provided at the bottom of the sand box seat 72, and the liquid return mask 91 is threadedly screwed with the sand box liquid outlet pipe 92. A rubber sealing ring 93 is provided between the sand box liquid outlet pipe 92 and the sand box seat 72 for sealing, and a hose is provided at the liquid outlet end of the sand box liquid outlet pipe 92, and the hose is connected to the external circulating water tank; a clamp group is provided in the sand box body 73, and a cooling water nozzle fulcrum 88 is provided on the upper short side of the sand box body 73. The outer end of the cooling water nozzle fulcrum 88 is connected to a water pipe, and the water pipe is connected to the external circulating water tank.

[0038] The base assembly includes a chassis 94, a double support rod seat 95, a guide rod 99, a washer 105, a horizontal adjustment bolt 109 and a hydraulic cylinder 112;

[0039] The lower end of the chassis 94 is installed with a horizontal adjustment bolt 109 through a GB / T70.1-2008 hexagonal round nut M20X80; the upper end of the chassis 94 is evenly distributed along its circumference with a plurality of double support rod seats 95, each of which is provided with a hydraulic cylinder 112 and a guide rod 99;

[0040] The fixed end of the hydraulic cylinder 112 is fixedly connected to the inner bottom surface of the double support rod seat 95, specifically: the fixed end of the hydraulic cylinder 112 is mounted on the hydraulic cylinder bottom plate 107 and connected with bolts; the hydraulic cylinder bottom plate 107 is mounted on the double support rod seat 95. The movable end of the hydraulic cylinder 112 is connected to the outer shell 14 of the transmission group, and the rise or fall of the hydraulic cylinder 112 drives the transmission group as a whole to rise or fall; the double support rod seat cover plate is installed on the double support rod seat 95, and the lower end of the guide rod 99 is installed on the double support rod seat 95, and the lower end is fastened by a flat washer with an inner diameter of 42 of GB / T97.1-2002, a stop washer of 42 of GB / T858-1988 and a round nut of M42 of GB / T812-1988, and the guide rod 99 is fixed to the inner bottom surface of the double support rod seat 95. The rod 99 passes through the double support rod seat cover plate, and the lower end of the double support rod seat cover plate is locked and fixed to the guide rod 99 through the flat washer with inner diameter 72 of GB / T97.1-2002 and the round nut M72 of GB / T812-1988, and the upper end of the double support rod seat cover plate is locked and fixed to the guide rod 99 through the flat washer with inner diameter 64 of GB / T97.1-2002, the stop washer 64 of GB / T858-1988 and the round nut M72 of GB / T812-1988;

[0041] The guide rod 99 is slidably connected to the outer shell 14 of the transmission group; a guide sleeve is provided in the outer shell 14 of the transmission group, and a copper sleeve is installed in the guide sleeve. The copper sleeve and the guide column 99 are guided to ensure the stability of the clamp group 1 during the lifting process;

[0042] A washer 105 is provided at the upper end of each double support rod seat 95, and the washer 105 is sleeved on the outer side of the guide rod 99. When the hydraulic cylinder 112 descends, the outer shell 14 of the transmission group contacts the washer 105. The washer 105 supports the transmission group and ensures the stability of the finishing operation of the fixture group 1.

[0043] The workflow of the present invention is as follows:

[0044] S1: The hydraulic cylinder 112 drives the transmission group and the clamp group to rise;

[0045] S2: Assemble the workpiece into the fixture set. One set of fixture sets can hold two workpieces, with a total of six sets of fixture sets.

[0046] S3: After the workpiece is assembled, the hydraulic cylinder 112 drives the transmission group and the fixture group to descend, and the outer shell 14 of the transmission group contacts the shim 105. The shim 105 supports the transmission group to ensure the stability of the finishing operation of the fixture group 1. The workpiece clamped by the fixture assembly is immersed in the abrasive particles in the sand box group. The main motor 26 and the revolving motor 19 are started to drive the workpiece to rotate in the sand box group. The main motor 26 provides the overall rotation power of the fixture group, and the revolving motor 19 provides the self-rotation rotation power of the workpiece;

[0047] S4: After the finishing process is completed, the hydraulic cylinder 112 drives the transmission group and the fixture group to rise, and the parts are removed from the fixture group to complete the entire processing process.

[0048] The present invention adopts a vertical structure and is placed vertically in the working state. The lifting platform adopts a hydraulic cylinder system and clamps 12 connecting rods at a time, involving the rotation of the connecting rod rotation shaft and the rotation in the box body, so as to realize the rotation and revolution of the 12 connecting rods in the sand box, and a water circulation system is provided to timely take away the residue and sediment in the medium.

[0049] The present invention mainly uses two electric motors as the main power. After the connecting rod is clamped, the two electric motors mainly realize the rotation and revolution of the connecting rod. The lifting and lowering of the transmission group is driven by the hydraulic cylinder to move up and down so that the workpiece can reach the appropriate position of the sand box for processing. The sand box of the connecting rod finishing machine adopts a fixed structure and a liquid return port is set at the bottom.

[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An internal combustion engine connecting rod finishing equipment, characterized in that: The invention comprises a transmission group, a plurality of fixture groups, a sand box group and a base group; the lower end of the transmission group is provided with a plurality of fixture groups, and the lower end of the transmission group is fixedly connected to the sand box group, and the plurality of fixture groups are all arranged in the sand box group; the sand box group is arranged on the base group, and the upper end of the base group is connected to the transmission group; the transmission group comprises a main transmission shaft 1 (9), a main transmission shaft 2 (10), a gear box connecting shaft (11), an outer shell (14), a revolving motor (19), a main motor (26), a main gear (33), a gear box (38) and a plurality of planetary gears (37); the main motor (26) and the revolving motor (19) are both fixed on the outer shell (14), the output shaft of the main motor (26) transmits power to the main transmission shaft 2 (10), the The lower end of the second main transmission shaft (10) is coaxially fixedly connected to the first main transmission shaft (9), the upper end of the outer side of the second main transmission shaft (10) is rotatably connected to the gear box connecting shaft (11), and the lower end of the outer side of the second main transmission shaft (10) is rotatably connected to the upper cover of the gear box (38); the outer side of the main transmission shaft (9) is coaxially fixedly sleeved with a main gear (33), the lower end of the main transmission shaft (9) is rotatably connected to the bottom plate of the gear box (38), the revolving motor (19) is transmission-connected to the gear box connecting shaft (11), the gear box connecting shaft (11) is rotatably arranged in the outer shell (14), the lower end of the gear box connecting shaft (11) is fixedly connected to the gear box (38), and a plurality of planetary gears (37) are rotatably arranged in the gear box (38), the plurality of planetary gears (37) are rotatably arranged in the gear box (38), Each planetary gear (37) is meshed and connected with the main gear (33); each set of the fixture group includes a lower fixture base plate (48), a lower fixture support plate (49), a positioning pin (50), a cam (53), an upper fixture base plate (56), an upper fixture support plate (57), a fastening nut (58), a planetary gear output shaft (59) and a cam shaft (65); the upper end of the planetary gear output shaft (59) is fixedly connected to the planetary gear shaft of the corresponding planetary gear (37), and the outer side of the planetary gear output shaft (59) is sequentially covered with a fastening nut (58), an upper fixture base plate (56) and a lower fixture base plate (48) from top to bottom, and the upper fixture base plate (56) is threadedly locked with the planetary gear output shaft (59) through the fastening nut (58). , and the outer side of the upper fixture bottom plate (56) is fixedly sleeved with an upper fixture support plate (57), and the outer side of the lower fixture bottom plate (48) is fixedly sleeved with a lower fixture support plate (49), and the opposite surfaces of the upper fixture support plate (57) and the lower fixture support plate (49) are provided with a plurality of positioning pins (50) arranged in a one-to-one correspondence; a camshaft (65) is vertically rotatably inserted in the middle of the planetary gear output shaft (59), and both ends of the camshaft (65) are fixedly sleeved with cams (53), and the two cams (53) are both arranged in cooperation with the upper fixture bottom plate (56); the base assembly includes a chassis (94), a double support rod seat (95), a guide rod (99), a washer (105), a horizontal adjustment bolt (109) and a hydraulic cylinder (112);A horizontal adjustment bolt (109) is installed at the lower end of the chassis (94); a plurality of double support rod seats (95) are provided at the upper end of the chassis (94), and a hydraulic cylinder (112) and a guide rod (99) are provided in each of the double support rod seats (95); the fixed end of the hydraulic cylinder (112) is fixedly connected to the inner bottom surface of the double support rod seat (95), the movable end of the hydraulic cylinder (112) is connected to the outer shell (14) of the transmission group, and the guide rod (99) is slidably connected to the outer shell (14) of the transmission group; a washer (105) is provided at the upper end of each double support rod seat (95), and the washer (105) is sleeved on the outer side of the guide rod (99).

2. The internal combustion engine connecting rod finishing equipment according to claim 1, characterized in that: The gear box (38) comprises a box body and a box cover connected by bolts, a plurality of main support bolts (8) are arranged between the box cover and the box body, and each of the main support bolts (8) is connected to the box cover and the box body via a corresponding main support nut (3).

3. The internal combustion engine connecting rod finishing equipment according to claim 1, characterized in that: The upper end of the fastening nut (58) is provided with a locking nut (60) threadedly connected to the planetary gear output shaft (59).

4. The internal combustion engine connecting rod finishing equipment according to claim 3, characterized in that: The fastening nut (58) is provided with a handle (61).

5. The internal combustion engine connecting rod finishing equipment according to claim 1, characterized in that: The sand box assembly comprises a sand box seat (72), a sand box body (73), a coupling body (74), a long key (82), a lower rotating shaft (83) of the gear box, a cooling water nozzle fulcrum (88), a liquid return housing (91), a sand box liquid outlet pipe (92) and a rubber sealing ring (93); the upper end of the lower rotating shaft (83) of the gear box is fixedly connected to the lower end of the middle part of the gear box (38), the outer wall of the lower rotating shaft (83) of the gear box is provided with a long key (82), and the outer side of the lower rotating shaft (83) of the gear box is slidably sleeved with a coupling body (74), and the lower rotating shaft (83) of the gear box and the coupling body (74) are connected. 4) Rotational connection, the coupling body (74) is arranged in the sand box body (73), the lower end of the coupling body (74) is fixedly connected to the sand box seat (72), the upper end of the sand box seat (72) is fixedly connected to the sand box body (73), a liquid return mask (91) is provided at the bottom of the sand box seat (72), the liquid return mask (91) is threadedly connected to the sand box liquid outlet pipe (92), and a rubber sealing ring (93) is provided between the sand box liquid outlet pipe (92) and the sand box seat (72); a clamp group is provided in the sand box body (73), and a cooling water nozzle fulcrum (88) is provided on the upper short side of the sand box body (73).

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