RU2107175C1 - Internal combustion engine running-in and test stand - Google Patents

Abstract

FIELD: mechanical engineering; running-in and testing of new and repaired internal combustion engines and other mechanisms, such as gearboxes, driving axles of vehicles. SUBSTANCE: stand has base. loading and coupling devices. Longitudinal guides are secured on base. Frame made in form of independent beams is installed on longitudinal guides. Beams are installed for displacement along longitudinal guides and cab be fixed relative to guides. Cross guides secured on beams carry pillars installed for displacement and fixing on beams. Cradles for engine are secured on pillars for displacement in vertical and fixing in required position. EFFECT: enlarged operating capabilities of stand. 3 cl, 4 dwg

Description

 The invention relates to the running-in and testing of newly manufactured and repaired internal combustion engines and can be used to break-in other mechanisms, such as gearboxes, drive axles of cars, transfer cases.

 A known stand for running in an internal combustion engine, containing an electric drive, a driveshaft, a disconnecting device with a spline sleeve and supports for placing the engine (ed. St. USSR N 1615592, class G 01 M 15/00, F 02 B 79/00, declared . 1988). The electric drive shaft is connected to the ratchet of the internal combustion engine through a cardan shaft, a disconnecting device, a spline sleeve and an engaging device. The disconnecting device is made in the form of a flange mounted on a spline sleeve and provided with a stepped protrusion with an engaging element, the latter provided with a ratchet. Between the electric drive and the internal combustion engine, a bearing support is installed, on which the driveshaft rests with its middle part. The test engine is mounted on supports coaxially to the propeller shaft. By moving the disconnecting device along the splines of the driveshaft, the engaging device is connected to the ratchet of the engine, after which the engine is run-in.

 The stand is designed to run-in engines of only a certain size, and therefore has narrow functional capabilities.

 Closest to the claimed in the aggregate of essential features is the prototype known for testing and testing the internal combustion engine (RF patent N 2044144, class F 02 B 79/00, G 01 M 15/00, declared 1993). The stand contains a base, longitudinal guides mounted on the base, and a brake mounted on the base, which performs the functions of a load device. A trolley is installed on the longitudinal guides, which has a frame, lodgements for placing the engine, a mechanism for fixing the trolley from axial movement and tipping over. The motor shaft is connected to the brake shaft by means of a connecting device. The stand has removable tool holders of various shapes and sizes for installing engines of various sizes. The lodgements are laid directly on the trolley frame.

 This stand is more versatile in comparison with the stand described above, since it allows you to run in engines of various sizes. Depending on the departure of the engine shaft, the trolley is fixed at an appropriate distance to the brake, and depending on the location of the engine mounts and the location of the engine shaft in height, lodgements of the appropriate shape and size are selected.

 The disadvantage of the stand is the low degree of versatility.

 The objective of the invention is to increase the degree of versatility of the stand.

 The problem is solved in that the stand for running in an internal combustion engine containing a base, a loading and connecting device, longitudinal guides mounted on the base, a frame mounted on longitudinal guides with the ability to move and fix, lodgements for placing the engine, according to the invention has transverse guides and racks, moreover, the frame is made in the form of autonomous beams, the transverse guides are fixed on the beams, and the racks are mounted on transverse rails with by moving and fixing.

 In addition, the lodgements are mounted on racks with the ability to move vertically and fix in a selected position. The connecting device is made in the form of an outer cylinder telescopically interconnected, an inner cylinder and a shaft with gear teeth for connecting to the motor shaft. The outer cylinder is bonded to a load device. The inner cylinder is connected to the outer cylinder by a first splined connection. The shaft is connected to the inner cylinder by a second splined connection. Clamps are installed on the outer and inner cylinders. Recesses are formed on the inner cylinder and on the shaft to accommodate the latches.

 Cross guides and racks mounted on transverse rails with the possibility of movement and fixing, as well as placement of lodges on racks provide the possibility of smooth adjustment of the distance between lodges in the transverse direction in a wide range in accordance with the location of the supports of the test engine, and also provide the ability to move the engine in perpendicular to the axis of the motor shaft.

 By making the frame in the form of autonomous beams with the placement of transverse guides, it is possible to change the length of the frame and the distance between the lodgements in the longitudinal direction in accordance with the location of the supports of the test engine.

 By fixing lodgements on racks with the possibility of moving vertically and fixing in a selected position, it is possible to regulate the position of the lodgements vertically and, accordingly, the possibility of placing the engine at different heights.

 Thus, the wide ranges provided for smoothly regulating the position of the lodgements in the longitudinal, transverse and vertical directions provide the possibility of fastening and running in other mechanisms, for example, gearbox, driving axle of a car, transfer case.

 The connecting device, made in the form of an outer cylinder telescopically interconnected, an inner cylinder and a shaft with gear teeth, allows you to speed up and facilitate the connection and disconnection of the motor shaft with the load device, which facilitates the operation of the stand.

 Other technical solutions containing the features set forth in the claims as distinctive are not known, which allows us to conclude that the inventive stand has an inventive step.

 In FIG. 1 shows a stand for running in an internal combustion engine, front view; in FIG. 2 - the same, top view with the engine removed and the connecting device folded; in FIG. 3 - section aa; in FIG. 4 - section BB.

 The stand for running-in and testing the internal combustion engine 1 contains a base 2 with longitudinal guides 3 fixed thereon, a load device 4 and a connecting device 5. Beams 6 are supported on the longitudinal guides 3, fastened with fixing bolts 7. In the beams 6 transverse guides 8 are formed On the beams 6 there are racks 9 in which the screws are screwed 10. The lodges 11 with clamping bolts 12 are fixed on the screws 10. The racks 9 are fastened with transverse guides 8 by fixing bolts 13. On the shaft 14 of the load device TWA 4 is secured by a bolt 15 to the outer cylinder 16 of the connecting device 5. In the outer cylinder 16, an inner cylinder 17 is mounted connected to it by means of the first splined joint 18. In the inner cylinder 17, a shaft 19 is mounted connected to it by the second splined joint 20. On the shaft 19 a centering cone 21 is formed and there are engaging teeth 22 for kinematic connection with the ratchet 23 of engine 1. On the outer cylinder 16 and on the inner cylinder 17, latches 24 are spring loaded with springs 25. On the inner cylinder Ndre 17 and recesses 26 are formed on the shaft 19 to accommodate the latches 24.

 The stand works as follows.

 Before the engine 1 is run-in, the lodgements 11 are installed in the position corresponding to the location of the supports of the engine size to be rolled in so that when the engine 1 is mounted on the lodges 11, the rotation axes of the ratchet 23 of engine 1 and the shaft 14 of the load device 4 coincide. To do this, the beams 6 are moved along the longitudinal guides 3 and fixed with fixing bolts 7. The posts 9 are moved along the transverse guides 8 and fixed with fixing bolts 13. By rotating the screws 10, the lodges 11 are installed at the required height. The rolling engine 1 is mounted on the lodgements 11 and secured with clamping bolts 12. The shaft 19 and the inner cylinder 17 are extended along the first 18 and second 20 splined joints until the teeth 22 engage with the ratchet 23 of engine 1. In this case, the position of the connecting device 5 and teeth 22 is centered on the axis the ratchet 23 is made by the centering cone 21. At the moment of the teeth 22 engaging with the ratchet 23, the latches 24 fall into the recesses 24 under the action of the springs 25, which prevents the axial displacement of the shaft 19 and the teeth 22 coming out of engagement with the ratchet 23. In this position, run-in and test of the engine 1.

 After the run-in, the latches 24 are removed from the recesses 26 by bending the springs 25. The shaft 19 is pushed into the inner cylinder 17, the teeth 22 are brought out of engagement with the ratchet 23, and the inner cylinder 17 is pushed into the outer cylinder 16. After loosening the clamping bolts 12, the engine 1 take off.

Claims (3)

 1. A bench for running and testing an internal combustion engine, comprising a base, loading and connecting devices, longitudinal guides mounted on the base, a frame mounted on longitudinal guides with the ability to move and fix, lodgements for placing the engine, characterized in that it has transverse guides and racks, moreover, the frame is made in the form of autonomous beams, the transverse guides are fixed on the beams, and the racks are mounted on transverse guides with the possibility of movement and xing.  2. The stand according to claim 1, characterized in that the lodgements are mounted on racks with the ability to move vertically and fix in a selected position.  3. The stand according to claim 1, characterized in that the connecting device is made in the form of an outer cylinder telescopically interconnected, an inner cylinder and a shaft with gear teeth for connecting to the motor shaft, the outer cylinder being attached to the loading device, the inner cylinder connected to the outer by means of a cylinder by means of a first splined connection, the shaft is connected to the inner cylinder by means of a second splined connection, locks are installed on the outer and inner cylinders, on the inner cylinder and on the shaft recesses are formed to accommodate the latches.

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