CN219176104U - Automobile engine hood lock - Google Patents

Abstract

An automobile engine cover lock has a base plate and a cover plate fixed to an automobile body and arranged side by side in parallel, a ratchet and a latch are rotatably installed between the base plate and the cover plate, the base plate and the cover plate have guide holes for the shackle to enter, the ratchet has notches for accommodating the shackle along its periphery, the base plate and/or the cover plate have radial protrusions facing each other along opposite portions of the periphery of the molding holes, the protrusions have guide edges parallel to each other for guiding fastening screws in directions perpendicular to a symmetry plane of the guide holes, the fastening screws pass through cylindrical bushings for installation of the ratchet and the latch, and the cylindrical bushings are disposed between the molding holes on the base plate and the molding holes on the cover plate.

Description

Automobile engine hood lock

Technical Field

The utility model relates to a motor vehicle bonnet lock, comprising a base plate and a cover plate, which are arranged side by side in parallel, between which a ratchet wheel and a latch are rotatably mounted, which ratchet wheel and latch are intended to engage each other via their peripheral stop surfaces on a cylindrical bushing, which is arranged between a profiled bore of the base plate and a profiled bore of the cover plate, and which has mutually parallel axes of rotation; the bottom plate and the cover plate have guide holes for the shackle (shackles) to enter, the guide holes have a common symmetry plane, the ratchet wheel has recesses along its periphery for receiving the shackles, and the bottom plate and the cover plate are fixed to the car body by fastening screws through cylindrical bushings.

Background

The floor and cover plates of an automotive bonnet lock have guide holes with a common plane of symmetry in which the bonnet shackle is movable and slides into the lock. During assembly, each bonnet lock must cover a shackle position tolerance that depends on the mounting tolerances of the individual bonnet and shackle relative to the stationary automobile body. The cylindrical bushing thus has a larger diameter than the tightening screw, so that the lock can be adjusted symmetrically towards the bonnet shackle. The larger diameter of the cylindrical bushing allows both the tightening screw to move horizontally, i.e. perpendicular to the symmetry plane of the guide holes in the base plate and the cover plate for the shackle to slide in, and the tightening screw to move vertically, i.e. parallel to the symmetry plane of the guide holes in the base plate and the cover plate. The adjustment of the position of the lock in both the horizontal and vertical directions allows for a correct setting of the position of the lock. Incorrect setting of the position of the lock may jeopardize the functional reliability of the lock. However, the adjustment of the position of the lock in both directions is difficult and tedious from an assembly point of view. In some cases, only horizontal adjustability of the position of the lock during assembly is sufficient or necessary, in particular because it is easier and faster, without significantly affecting the accuracy of the position setting of the lock and causing undesired force effects between the shackle and the ratchet in the closed lock position.

From its own information source, the applicant has known a motor vehicle bonnet lock in which ratchet and latch are mounted on cylindrical bushings having mutually parallel rotation axes, the cylindrical bushings being inserted into profiled holes of a bottom plate and a cover plate, said profiled holes being arranged coaxially facing each other. For the shackle to enter, the base plate and the cover plate have guide holes with a common plane of symmetry and the ratchet has a recess along its periphery for receiving the shackle. The floor and the cover are fastened to the body of the vehicle using fastening screws which pass through the cylindrical bushing through a large gap. A cylindrical bushing, which has a larger diameter than the tightening screw, allows both an adjustment of the tightening screw perpendicular to the symmetry plane of the guiding holes in the base plate and the cover plate for the shackle to slide in, and an adjustment of the tightening screw parallel to the symmetry plane of the guiding holes in the base plate and the cover plate, which makes a correct lock assembly more difficult and tedious.

DE102015105409 A1 discloses a vehicle door lock which is fastened to a vehicle body pillar and comprises two plates, a bottom plate having a cylindrical hollow pin for mounting movable parts, a ratchet and a latch, and a cover comprising a cover plate. In the assembled lock, the end of the cylindrical hollow pin is inserted into the profiled hole of the cover plate. The end of the cylindrical hollow pin of the base plate has an axial projection which passes through and overlaps the profiled bore of the cover plate, providing a fixed connection between the base plate and the cover plate. The correct mutual position of the base plate and the cover plate is provided by means of projections on the base plate which extend with a certain tolerance into the forming holes of the cover plate, opposite the projections on the cover plate. Neither the position of the lock on the body pillar nor the position of the cylindrical hollow pin for mounting the movable ratchet and latch can be adjusted relative to the door shackle, which is inserted into the lock in the locked position.

CN 209942459U discloses a device for fastening an automobile door lock, comprising a bearing plate with a cylindrical bushing for mounting a locking pin; and a positioning plate having a guide forming hole in the form of an elongated shape (oblong) for guiding the bearing plate in one direction. The elongated guide forming holes in the positioning plate are arranged in sequence so as to be slidable along a longitudinal axis. The width of the guide forming hole is matched with the diameter of the cylindrical bushing of the bearing plate. The cylindrical bushing of the bearing plate extends into the guide forming hole with a play, the fastening plate being thus movable in one direction relative to the positioning plate. The positioning plate is also provided with a guide protrusion for guiding the bearing plate and a stop protrusion for limiting the end position. The fastening means of the lock make it easy to set the position of the bearing plate by means of a cylindrical bushing for the pin on the positioning plate. The use of lock fastening devices in automobiles requires that the body have a guide-forming hole in the form of an elongated shape, which is difficult in terms of space and production requirements.

US20160221473 discloses a car seat lock comprising a box with side panels and a cover plate. The side plates and the cover plate have circular holes for mounting hollow load-bearing pins on which the latches are rotatably mounted between the side plates and the cover plate. The side plates and the cover plate are also provided with oblong holes for mounting hollow bearing pins, and ratchet wheels are rotatably mounted on the hollow bearing pins between the side plates and the cover plate. A fastening screw, not shown, passes through the cylindrical holes in the hollow load bearing pins of the ratchet and latch for fastening the side and cover plates of the lock case to the seat. The oblong holes in the side plates and the cover plates for mounting the ratchet load bearing pins are designed such that the ratchet load bearing pins can be located in at least two different positions relative to the side plates and the cover plates. The latch bearing pin is mounted in the circular aperture of the side plate and the cover plate in one position relative to the side plate and the cover plate. The mutual distance between the axes of the ratchet load bearing pin and the latch load bearing pin, i.e. the mutual distance between the fastening screws, must be within a precise tolerance with respect to the mutual distance between the axes of the seat holes for inserting the fastening screws, in order to allow the installation of the fastening screws on the seat at all times in size. Exceeding the tolerance range of the mutual distance between the tightening screws may prevent the lock box from being tightened to the seat. The co-arrangement of the circular hole for mounting the latch load pin and the oblong hole for mounting the ratchet load pin eliminates the problem of precise tolerances of the distance between the fastening screws, thus helping and ensuring that the lock box is fastened to the seat. The car seat box according to US20160221473 does not allow setting of a lock in relation to the shackle.

JPS59188261U discloses an automotive bonnet lock comprising a shackle provided on the bottom of a tiltable bonnet; a flat metal fitting fixed to the vehicle body and having a guide hole for guiding the shackle; and a hook rotatably mounted in the vehicle body for engagement with the shackle in an inclined bonnet position. The flat metal fitting has a hole for bolting with the vehicle body. Two oblong holes are arranged with their longitudinal axes at the sides and perpendicular to the axis of the guide holes for adjusting the fitting position in a direction perpendicular to the axis of the guide holes. Two further pairs of oblong holes are arranged, the longitudinal axes of which are located sideways and parallel to the guide holes. The flat fitting is thus adjustable in two mutually perpendicular directions. However, this design cannot be used with automotive engine-head locks that include a ratchet and latch rotatably mounted on a hollow pin disposed between a floor and a cover plate.

Disclosure of Invention

The object of the present utility model is to eliminate the drawbacks of the prior art and to provide an automotive bonnet lock which is easier and faster to install, while at the same time significantly improving the accuracy of the setting of the lock position with respect to the shackle.

The drawbacks of the prior art are substantially eliminated and the object of the present utility model is achieved by an automotive bonnet lock comprising a bottom plate and a cover plate arranged side by side in parallel, between which a ratchet wheel and a latch are rotatably mounted for engagement with each other on a cylindrical bushing with their peripheral stop surfaces and having mutually parallel rotation axes r, z, the cylindrical bushing being arranged between a profiled hole of the bottom plate and a profiled hole of the cover plate; the utility model relates to a method for fastening a shackle to a vehicle body, comprising the steps of providing a base plate and a cover plate with a guide hole for the shackle to enter, the guide hole having a common symmetry plane, providing a ratchet wheel with a recess for receiving the shackle along its periphery, and fixing the base plate and the cover plate to the vehicle body by means of a fastening screw passing through a cylindrical bushing, wherein according to the utility model the essence of the utility model is that mutually facing radial projections are provided on the profiled hole of the base plate along opposite parts of the profiled hole periphery, the radial projections are fixed on the base plate or are integral with the base plate, the radial projections have mutually parallel guiding edges for guiding the fastening screw in a direction perpendicular to the symmetry plane of the guide hole, and/or the mutually facing radial projections are provided on the profiled hole of the cover plate along opposite parts of the profiled hole periphery, the radial projections are fixed on the cover plate or are integral with the cover plate, and the guiding edges are mutually parallel guiding edges for guiding the fastening screw in a direction perpendicular to the symmetry plane of the guide hole.

Advantageously, the end of the cylindrical sleeve facing the base plate may have axial peripheral projections extending along opposite portions of the periphery of the cylindrical sleeve and extending along the curved edges of the shaped aperture of the base plate between the radial projections of the base plate into the shaped aperture of the base plate for providing a secure connection with the base plate, and the end of the cylindrical sleeve facing the cover plate may have axial peripheral projections extending along opposite portions of the periphery of the cylindrical sleeve and extending along the curved edges of the shaped aperture of the cover plate between the radial projections of the cover plate into the shaped aperture of the cover plate for providing a secure connection with the cover plate. Advantageously, the axial peripheral projection is engageable with a radial projection of the bottom plate and the axial peripheral projection is engageable with a radial projection of the cover plate. Advantageously, the axial peripheral projections of the cylindrical bush can be fixed in the shaped holes of the base plate and of the cover plate.

The utility model provides an automobile engine cover lock comprising a bottom plate and a cover plate which are arranged side by side in parallel, a ratchet wheel and a latch are rotatably mounted between the bottom plate and the cover plate, the ratchet wheel and the latch are used for being mutually jointed through peripheral surfaces of the ratchet wheel and the latch and are provided with mutually parallel rotating shafts, the bottom plate is provided with a first guide hole used for a shackle to enter, the cover plate is provided with a second guide hole used for the shackle to enter, the first guide hole and the second guide hole are provided with a common symmetrical surface, the ratchet wheel is provided with a notch used for accommodating the shackle along the periphery of the ratchet wheel, and the bottom plate and the cover plate are fixed on an automobile body through fastening screws, and the fastening screws penetrate through first forming holes formed on the bottom plate and second forming holes formed on the cover plate. The bottom plate is provided with first radial protrusions facing each other along opposite parts of the periphery of the first molding hole, the first radial protrusions are provided with first guide edges parallel to each other, and the first guide edges are used for guiding the fastening screw in a direction perpendicular to the symmetry plane; and/or the cover plate has second radial projections facing each other along opposite portions of the periphery of the second molding hole, the second radial projections having second guide edges parallel to each other for guiding the fastening screw in a direction perpendicular to the symmetry plane, wherein the fastening screw passes through a cylindrical bushing arranged between the first molding hole of the bottom plate and the second molding hole of the cover plate.

According to one aspect of the utility model, the first radial projection is fixed to or integral with the base plate and the second radial projection is fixed to or integral with the cover plate.

According to one aspect of the utility model, the cylindrical sleeve has first and second axial peripheral projections at its ends, the first and second axial peripheral projections extending along opposite portions of the periphery of the cylindrical sleeve, and the first axial peripheral projections extending into the first shaped aperture along a curved edge of the first shaped aperture between the first radial projections of the base plate, and the second axial peripheral projections extending into the second shaped aperture along a curved edge of the second shaped aperture between the second radial projections of the cover plate to provide a fixed connection with the base plate and the cover plate.

According to one aspect of the utility model, the first axial peripheral projection engages with the first radial projection of the bottom plate and the second axial peripheral projection engages with the second radial projection of the cover plate.

According to one aspect of the utility model, the first axial peripheral projection of the cylindrical bushing is secured in the first shaped hole, and the second axial peripheral projection of the cylindrical bushing is secured in the second shaped hole.

The advantage of the bonnet lock according to the utility model is that the correct lock position is simple and reliable with respect to the setting of the bonnet shackle and that a high functional reliability of the lock is maintained.

Drawings

An exemplary embodiment of an automotive bonnet lock according to the present utility model is shown in the drawings, wherein

FIG. 1 is a front view of an engine cover lock with shackle in a locked position;

FIG. 2 is a vertical cross-sectional view through the bonnet lock;

FIG. 3 is a horizontal cross-sectional view through the bonnet lock;

FIG. 4 is an oblique view of the floor of the bonnet lock;

FIG. 5 is an oblique view of a cover plate of the bonnet lock;

FIG. 6 is an oblique view of a cylindrical bushing;

fig. 7 is an oblique view of the bonnet lock.

Reference numerals

1. Lock with locking mechanism

2. Shackle (shackles)

21. Bottom plate

21a fold

22. First guide hole

23. First forming hole

24. Third forming hole

25. First radial protrusion

26. Third radial protrusion

27. A first leading edge

28. A third leading edge

29a curved edge

29b curved edge

29c curved edge

29d curved edge

31. Cover plate

31a fold

32. Second guide hole

33. Second forming hole

34. Fourth forming hole

35. Second radial protrusion

36. Fourth radial protrusion

37. A second leading edge

38. Fourth leading edge

39a curved edge

39b curved edge

39c curved edge

39d curved edge

41. Ratchet wheel

42. Peripheral stop surface

43. Cylindrical bushing

44. First axial peripheral projection

45. Second axial peripheral projection

46. Fastening screw

47. Recess (es)

51. Latch bolt

52. Peripheral stop surface

53. Cylindrical bushing

54. Third axial peripheral protrusion

55. Fourth axial peripheral projection

56. Fastening screw

rotation axis r of r ratchet 41

Rotation axis z of z latch 51

t plane of symmetry common to the first guide hole 22 and the second guide hole 32

Direction of movement alpha of alpha shackle 2

Detailed Description

According to fig. 1, the bottom plate 21 and the cover plate 31 of the lock are arranged side by side in parallel. The ends of the fastening screws 46, 56 are screwed into the vehicle body, the fastening screws acting as load bearing members of the lock being fastened together to the vehicle body. The fastening screw 46 passes through the first molding hole 23 of the bottom plate 21 and the second molding hole 33 of the cover plate 31, and the fastening screw 56 passes through the third molding hole 24 of the bottom plate 21 and the fourth molding hole 34 of the cover plate 31. A cylindrical bushing 43 is provided between the first shaped aperture 23 of the base plate 21 and the second shaped aperture 33 of the cover plate 31. A cylindrical bushing 53 is provided between the third shaped aperture 24 of the base plate 21 and the fourth shaped aperture 34 of the cover plate 31. The cylindrical bushing 43 shows its second axial peripheral projection 45 which extends into the second profiled bore 33 of the cover plate 31. The cylindrical bushing 53 shows a fourth axial peripheral projection 55 thereof which extends into the fourth shaped aperture 34 of the cover plate 31. Advantageously, the second and fourth axial peripheral projections 45 and 55 each fill the entire circular arc portion of the second and fourth profiled holes 33, 34 of the cover plate 31 and engage with the adjacent second and fourth radial projections 35 and 36, respectively. Advantageously, the ends of the second and fourth axial peripheral projections 45 and 55 are respectively fixed on the second and fourth shaped holes 33, 34. The ratchet 41 of the lock is rotatably mounted on the cylindrical bushing 43 and has a recess 47 for receiving the shackle 2. The latch 51 of the lock is rotatably mounted on a cylindrical bushing 53. The latch 51 and the ratchet 41 have rotation axes r, z parallel to each other, and are engaged with each other by their peripheral surfaces. For the entry of the shackle 2, the bottom plate 21 has a first guide hole 22 and the cover plate 31 has a second guide hole 32. The first and second guide holes 22, 32 have a common plane of symmetry t. The release of the shackle 2 into the first and second guiding holes 22, 32 of the lock takes place substantially in the direction a. The opposite part of the periphery of the second profiled hole 33 of the cover plate 31 has second radial projections 35 with mutually parallel guide edges, the mutual distance between which is greater than the diameter of the fastening screw 46, so that the fastening screw 46 can be guided in a direction perpendicular to the plane of symmetry t of the second guide hole 32 of the cover plate 31. Likewise, the opposite part of the periphery of the fourth profiled hole 34 of the cover plate 31 has fourth radial projections 36 with mutually parallel guide edges, the mutual distance between which is greater than the diameter of the fastening screw 56, so that the fastening screw 56 can be guided in a direction perpendicular to the plane of symmetry t of the second guide hole 32 of the cover plate 31. Advantageously, the second radial projection 35 and the fourth radial projection 36 are integral with the cover plate 31; advantageously, the radial projections may be formed as separate parts which are fixed to the cover plate 31. The same arrangement and design as the radial projections on the cylindrical bushing may be present on the side of the bottom plate 21 and the same arrangement and design as the axial peripheral projections of the shaped holes may be present on the bottom plate 21.

According to fig. 2, a cylindrical bushing 43 is arranged between the base plate 21 and the cover plate 31. Ratchet 41 is rotatably mounted on cylindrical bushing 43. The base plate 21 has a first radial projection 25 which covers an inner profiled bore of the cylindrical liner 43, the leading edge of which provides a guide for the movement of the fastening screws 46, 56 relative to the base plate 21. Likewise, the cover plate 31 has a second radial projection 35 which covers the inner profiled bore of the cylindrical bushing 43, the guiding edges of which provide guidance for the movement of the fastening screws 46, 56 relative to the cover plate 31.

According to fig. 3, cylindrical bushings 43 and 53 are provided between the base plate 21 and the cover plate 31, their ends adjoining the cover plate 31 being provided with second and fourth axial peripheral projections 45 and 55, respectively, which extend into the cover plate 31 along the curved edges of the shaped holes of the cover plate 31.

Fig. 4 shows the shape of the bottom plate 21 with a first guide hole 22 for the shackle (not shown) to enter and first and third shaped holes 23, 24 of the bottom plate 21 for connection with a cylindrical bushing (not shown). The first shaped aperture 23 has first guide edges 27 facing each other on the first radial projections 25 of the base plate 21, and the third radial projections 26 of the base plate 21 have third guide edges 28 facing each other on the third radial projections 26. The curved edges 29a, 29b of the first shaped aperture 23 are located between the first radial projections 25 and the curved edges 29c, 29d of the third shaped aperture 24 are located between the third radial projections 26 for the insertion of an axial peripheral projection (not shown) of the cylindrical bushing.

Fig. 5 shows the shape of a cover plate 31 with a second guide hole 32 for the shackle (not shown) to enter and second and fourth profiled holes 33, 34 of the cover plate 31 for connection with a cylindrical bushing (not shown). The second molding hole 33 has second guide edges 37 facing each other on the second radial projections 35 of the cover plate 31, and the fourth radial projections 36 of the cover plate 31 have fourth guide edges 38 facing each other on the fourth radial projections 36. The curved edges 39a, 39b of the second shaped aperture 33 are located between the second radial projections 35 and the curved edges 39c, 39d of the fourth shaped aperture 34 are located between the fourth radial projections 36 for the insertion of an axial peripheral projection (not shown) of the cylindrical bushing.

According to fig. 6, the cylindrical bushings 43, 53 have a second and a fourth axial peripheral projection 45, 55, respectively, at one end thereof. The other end of the cylindrical bushings 43, 53 have first and third axial peripheral projections 44, 54, respectively.

Fig. 7 shows an assembly of the lock with a base plate 21 and a cover plate 31. The bottom plate 21 has a first guide hole 22 and the cover plate 31 has a second guide hole 32 for the entry of a shackle (not shown) which moves along the symmetry plane t of the first and second guide holes 22, 32 and is accommodated by the ratchet 41. The cylindrical bushings 43, 53 are disposed between the base plate 21 and the cover plate 31 coaxially with the forming holes of the base plate and the cover plate. The profiled bore of the cover plate 31 exposes respective second and fourth radial projections 35 and 36 of the cover plate 31 which move with the peripheral portion of the profiled bore of the cover plate relative to each other, and respective second and fourth axial peripheral projections 45 and 55 of the cylindrical bushings 43, 53 which extend into the profiled bore of the cover plate 31 along the periphery of the profiled bore of the cover plate between the second and fourth radial projections 35 and 3625 and 26, respectively.

Claims (5)

1. An automotive bonnet lock comprising a floor (21) and a cover plate (31) arranged side by side in parallel, between which a ratchet wheel (41) and a latch (51) are rotatably mounted, said ratchet wheel and said latch being intended to be mutually engaged by their peripheral surfaces and having mutually parallel axes of rotation (r, z), said floor (21) having a first guide hole (22) for the entry of a shackle (2), said cover plate (31) having a second guide hole (32) for the entry of a shackle (2), said first guide hole and said second guide hole having a common plane of symmetry (t), said ratchet wheel (41) having along its periphery a recess (47) for receiving said shackle (2), and said floor (21) and said cover plate (31) being fixed to the body of the automobile by means of a fastening screw (46) passing through a first shaped hole (23) formed on said floor (21) and a second shaped hole (33) formed on said cover plate (31),

it is characterized in that the method comprises the steps of,

the base plate (21) has first radial projections (25) facing each other along opposite parts of the periphery of the first shaped hole (23), the first radial projections having first guide edges (27) parallel to each other for guiding the fastening screw (46) in a direction perpendicular to the symmetry plane (t), and/or

The cover plate (31) has second radial projections (35) facing each other along opposite parts of the periphery of the second molding hole (33), the second radial projections having second guide edges (37) parallel to each other for guiding the fastening screw (46) in a direction perpendicular to the symmetry plane (t),

wherein the fastening screw (46) passes through a cylindrical bushing (43), the cylindrical bushing (43) being arranged between the first shaped hole (23) of the bottom plate (21) and the second shaped hole (33) of the cover plate (31).

2. The automobile engine cover lock according to claim 1,

it is characterized in that the method comprises the steps of,

the first radial projection (25) is fastened to the base plate (21) or is integral with the base plate (21), and the second radial projection (35) is fastened to the cover plate (31) or is integral with the cover plate (31).

3. The automobile engine cover lock according to claim 1,

it is characterized in that the method comprises the steps of,

the cylindrical bushing (43) has first and second axial peripheral projections (44, 45) at its ends, which extend along opposite portions of the periphery of the cylindrical bushing (43), and the first axial peripheral projection (44) extends into the first shaped aperture (23) along a curved edge of the first shaped aperture (23) between the first radial projections (25) of the base plate (21), and the second axial peripheral projection (45) extends into the second shaped aperture (33) along a curved edge of the second shaped aperture (33) between the second radial projections (35) of the cover plate (31) to provide a fixed connection with the base plate (21) and the cover plate (31).

4. The automobile engine cover lock according to claim 3,

it is characterized in that the method comprises the steps of,

the first axial peripheral projection (44) engages with the first radial projection (25) of the bottom plate (21), and the second axial peripheral projection (45) engages with the second radial projection (35) of the cover plate (31).

5. The automobile engine cover lock according to claim 3 or 4,

it is characterized in that the method comprises the steps of,

the first axial peripheral projection (44) of the cylindrical bush (43) is fixedly connected in the first forming hole (23), while the second axial peripheral projection (45) of the cylindrical bush (43) is fixedly connected in the second forming hole (33).

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