SE540887C2

SE540887C2 - A pin for removable connection of a first part and a second part and a mechanical joint or suspension device comprising such pin

Info

Publication number: SE540887C2
Application number: SE1750491A
Authority: SE
Inventors: Anel Pasic; Markus Börjes
Original assignee: Scania Cv Ab
Priority date: 2017-04-25
Filing date: 2017-04-25
Publication date: 2018-12-11
Also published as: DE102018003192A1; SE1750491A1; DE102018003192B4

Abstract

The invention relates to a pin (10; 320; 420) for removable connection of a first part (20; 100) and a second part (30; 200), the pin (10; 320; 420) being adapted to be arranged in a recess (22; 130’, 130”, 140’, 140”) formed in the first part (20; 100) and a recess (32; 230’ 230”, 240’, 240”) formed in the second part (30; 200), wherein the pin (10; 320; 420) has a cross section comprising a first radius (R1) and a second radius (R2), where the first radius (R1) is different from the second radius (R2).The invention also relates to a mechanical joint comprising such a pin (10); a suspension device (60) comprising such a pin (10) and a vehicle (1) comprising such a suspension device (60).

Description

A pin for removable connection of a first part and a second part and a mechanical joint or suspension device comprising such pin TECHNICAL FIELD The present invention relates to a pin for removable connection of a first part and a second part, a mechanical joint comprising such a pin, a suspension device comprising such a pin and a vehicle comprising such a suspension device.

BACKGROUND Connecting two parts by using some sort of pin arranged in a groove or hole is commonly known, for example in so called cotter joints, knuckle joints and similar. Such a pin could thus constitute a wedge, a cotter or a knuckle pin and is often associated with challenges relating to the contact surface of the pin and forces acting on the contact surface. High forces acting on a small contact surface could cause problems and typically place high demands on the material of the pin to meet strength requirements.

Triangular wedges with straight sides are often used but have the disadvantage that it is difficult to achieve exactly the same angle of the wedge and the groove. The wedge may therefore be awry arranged in the groove and the contact surface of the wedge abutting the groove wall may become smaller than planned. With a smaller contact surface the configuration of the wedge may not be able to resist the forces acting on the wedge and the wedge may thereby be deformed or even break. A small contact surface may also cause cracks in the groove. To avoid this problem wedges with circular cross section have been used, which guarantees a linear contact between the wedge and the groove/hole. However, the contact surface of a cylindrical wedge may be very small depending on the radius and may therefore require a material which can resist the high forces acting on the wedge. Alternatively, the contact surface can be increased, whereby the forces are distributed over a larger area and thereby do not have the same impact on the wedge or the groove/hole. To increase the contact surface of a cylindrical wedge the radius of the wedge must be increased. This could however be a problem in limited spaces where the size of the wedge is crucial.

SUMMARY OF THE INVENTION Despite known solutions in the field, there is still a need to develop a pin for removable connection of a first part and a second part, which overcomes or alleviates at least some of the drawbacks of the prior art.

An object of the present invention is therefore to achieve an advantageous pin for removable connection of a first part and a second part, which has an increased strength and a relatively small total volume.

Another object of the present invention is to achieve an advantageous mechanical joint for removable connection of a first part and a second part, which comprises a pin with an increased strength and a relatively small total volume.

A further object of the present invention is to achieve an advantageous suspension device for removable attachment of a component to a vehicle structure, which comprises a pin with an increased strength and a relatively small total volume.

These objects are achieved by a pin, a mechanical joint, a suspension device and a vehicle according to the independent claims.

Hence, according to an aspect of the present invention a pin for removable connection of a first part and a second part is provided. The pin is adapted to be arranged in a recess formed in the first part and a recess formed in the second part, wherein the pin has a cross section comprising a first radius and a second radius, where the first radius is different from the second radius. The pin may be adapted to interact with the recess formed in the first part and the recess formed in the second part. Suitably, at least a part of the pin adapted to interact with the recesses has a cross section comprising a first radius and a second radius, the first radius being different from the second radius. The pin suitably comprises at least one curved section having the first radius and at least one curved section having the second radius. Each section suitably extends along a part of the circumferential of the pin and along at least a part of the length (longitudinal extension) of the pin. Each section constitutes a part of the circumferential of the pin.

The pin may constitute a part of a mechanical joint. The pin may be a cotter or a wedge. The pin may alternatively constitute a knuckle pin. The pin may be adapted to lock/attach/connect a first part and a second part to each other.

A pin for connection of a first part and a second part is typically subject to forces from the first part and/or the second part acting on at least one contact surface of the pin. As described in the background, the smaller the contact surface the larger is the force acting on said surface. By configuring the pin such that it has a cross section with a first and a second radius, a pin with noncircular cross section but with curved sections is achieved. The pin may be elongated with a centre axis. The curved sections are suitably convex in relation to the centre axis of the pin. By having curved convex sections it is easier to obtain a desired contact surface abutting the wall of the respective recess. It is known to use pins with circular cross sections in order to more or less guarantee a certain contact surface compared to wedges with straight sides. However, depending on the radius of the circular cross section the contact surface may be relatively small. By configuring the pin with a first radius and a second radius where the first radius is different from the second radius, a larger and a smaller radius can be used. The larger radius enables a larger total contact surface and the smaller radius ensures that the pin maintains relatively small in size compared to a pin with circular cross section having the larger radius. A compact pin with increased strength is thereby achieved.

According to an embodiment of the invention the pin comprises at least one section adapted to abut a wall of the recess in the first part and/or a wall of the recess in the second part. The at least one section thus comprises a contact surface. By contact surface is thus meant a surface of the pin that abuts the wall of the respective recess when the pin is used for connection of the first part and the second part. Depending on the application in which the pin is used, and thus depending on the recesses, the at least one section may be adapted to abut the wall of a recess along the entire longitudinal extension of the section or at separate positions along the longitudinal extension of the section. For simplicity, the contact surface of a section will herein be defined as the total surface of said section abutting a wall of a recess. Depending on the shape and dimensions of the recess in relation to the pin, the at least one section may have the first radius or the second radius. The pin may be configured, such that at least one section having the larger radius is adapted to abut the wall of the recess in the first part and/or the wall of the recess in the second part, whereby a pin with a larger contact surface is achieved. The pin may be configured, such that two different sections having the smaller radius are adapted to abut the wall of the recess in the first part and/or the wall of the recess in the second part. This way, the total contact surface of the pin is increased. The total contact surface of the pin is defined as the combined contact surfaces of all sections of the pin.

The pin may comprise at least two curved sections with the first radius and at least two curved sections with the second radius. The pin is suitably symmetrically shaped. A section with the second radius may connect two sections with the first radius, thus a section having the second radius may be arranged between two sections having the first radius. A section having the first radius is always arranged next to a section having the second radius. The first radius is suitably larger than the second radius.

According to an embodiment of the invention the cross section of the pin is essentially triangular and comprises three sides with the first radius and three corners with the second radius, the corners connecting the sides. The pin thus comprises three curved sections having the first radius and three curved sections having the second radius. The corners are thus curved and have a smaller radius than the sides of the pin. Alternatively, the cross section of the pin is essentially square shaped and comprises four sides with the first radius and four corners with the second radius, the corners connecting the sides. The pin thus comprises four curved sections having the first radius and four curved sections having the second radius. The pin according to the invention thus has a non-circular cross section but still comprises curved (convex) sections, which in a more reliable way ensures that a contact surface of the pin abuts the recess wall(s) as desired.

According to an embodiment the pin is adapted to be arranged in a groove formed by the recess in the first part and the recess in the second part. The groove may be essentially v-shaped or u-shaped. The recess in the first part may form one side wall of the groove and the recess in the second part may form the opposite side wall of the groove. The side walls of the groove may be straight, convex or concave. Each section along the longitudinal extension of the groove thus comprises the first part and the second part. The pin being adapted to be arranged in such a groove may constitute a type of wedge. In this case the pin suitably comprises two curved sections adapted to abut the walls of the groove. One curved section may be adapted to abut a side wall formed by the first part and one curved section may be adapted to abut a side wall formed by the second part. Each curved section of the pin adapted to abut a side wall of the groove suitably has the first radius, i.e. the larger radius. This way, a larger total contact surface is achieved and the durability of the pin, the first part and the second part is increased while keeping the pin relatively compact.

According to an embodiment of the invention the pin is adapted to be arranged in a through hole formed in the first part and the second part. Thus, the recess formed in the first part and the recess formed in the second part may be through holes, also called eyes. The first part and the second part may be arranged, such that the through holes of the parts are coaxially arranged, forming a longitudinally extending through hole. The pin is adapted to be inserted in the hole and thereby connecting the first part and the second part to each other. This kind of connection/joint normally comprises circular holes and a pin with homogenous circular cross section. In such an arrangement the pin may have a relatively small contact surface abutting the inside wall of the hole. By using a pin according to the invention with two different radiuses the contact surface can be increased. In the case where the radius of the circular through hole is larger than the first (largest) radius of the pin, one section of the pin having the first radius will abut the wall of the hole, at any given moment. Since the pin comprises sections with a smaller radius (the second radius) a larger first radius can be used and the pin will still be small enough to fit inside the hole. An increased contact surface is thus achieved while keeping the overall size of the pin small. In the case where the radius of the through hole is smaller than the first radius of the pin it is more likely that two sections having the second radius will abut the wall of the hole, at any given moment. This way, the total contact surface is increased compared to a pin with a circular cross section.

If the first radius/the larger radius is too large, the sections having the first radius may be essentially straight. The advantages of having a curved contact surface will thereby be lost. It is therefore important that the first radius is not too large. The first radius may be a multiple of the width of the pin. The width of the pin may be defined as the distance between two sections having the second radius. The width may be defined as the diameter of the pin at the widest point of the pin. The relationship between the first radius and the width may be such, that the first radius is at the most 2,5 times the width of the pin.

The first radius is suitably twice the width. The first radius may be within the range of 0,75-2,5 times the width. Within this range a sufficiently large contact surface will be achieved without causing tolerance problems.

According to an aspect of the invention a mechanical joint is provided, comprising a first part having a recess and a second part having a recess, wherein the joint comprises a pin as herein described for connecting the first part and the second part to each other. The mechanical joint thus comprises a pin for removable connection of the first part and the second part, the pin being adapted to be arranged in the recess formed in the first part and the recess formed in the second part, wherein the pin has a cross section comprising a first radius and a second radius, where the first radius is different from the second radius.

According to an aspect of the invention a suspension device for removable attachment of a component to a vehicle structure is provided, the suspension device comprising: a first part adapted to be mounted on the component; and a second part adapted to be mounted on the vehicle structure. The suspension device comprises at least one pin as herein described for connecting the first part and the second part. The suspension device thus comprises a pin for removable connection of the first part and the second part, the pin being adapted to be arranged in a recess formed in the first part and a recess formed in the second part, wherein the pin has a cross section comprising a first radius and a second radius, where the first radius is different from the second radius. The first part may be a first bracket and the second part may be a second bracket.

Further objects, advantages and novel features of the present invention will become apparent to one skilled in the art from the following details, and also by putting the invention into practice. Whereas embodiments of the invention are described below, it should be noted that it is not restricted to the specific details described. Specialists having access to the teachings herein will recognise further applications, modifications and incorporations within other fields, which are within the scope of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS For fuller understanding of the present invention and further objects and advantages of it, the detailed description set out below should be read together with the accompanying drawings, in which the same reference notations denote similar items in the various drawings, and in which: Figure 1a-c schematically illustrates a pin for removable connection of a first part and a second part according to embodiments of the invention; Figure 2a-e schematically illustrates a pin for removable connection of a first part and a second part according to embodiments of the invention; Figure 3a-b schematically illustrates a suspension device according to an embodiment of the invention; Figure 4a-c schematically illustrates applications for a suspension device according to embodiments of the invention; and Figure 5 schematically illustrates a vehicle according to an embodiment of the invention.

DETAILED DESCRIPTION OF THE DRAWINGS Figures 1a-1c schematically illustrate a pin 10 for removable connection of a first part 20 and a second part 30 according to embodiments of the invention. The pin 10 is adapted to be arranged in a recess 22 formed in the first part 20 and a recess 32 formed in the second part 30, wherein the pin 10 has a cross section comprising a first radius R1 and a second radius R2, where the first radius R1 is different from the second radius R2. Suitably, at least the parts of the pin 10 adapted to interact with the recesses 22, 32 have a cross section comprising a first radius R1 and a second radius R2, where the first radius R1 is different from the second radius R2. The pin 10 suitably comprises at least one curved section having the first radius R1 and at least one curved section having the second radius R2. Each section suitably extends along at least a part of the length of the pin 10. Each section constitutes a part of the circumferential of the pin 10.

In the embodiments shown in Figure 1a and 1b the cross section of the pin 10 is essentially square shaped and comprises four curved sections 12 having the first radius R1 and four curved sections 14 having the second radius R2. Thus, the pin 10 comprises four sides 12 with the first radius R1 and four corners 14 with the second radius R2, the corners 14 connecting the sides 12. The pin 10 thus has a non-circular cross section but still comprises curved (convex) sections. The pin 10 may be elongated with a centre axis (not shown). The curved sections 12, 14 are suitably convex in relation to the centre axis of the pin 10. The convex sections 12, 14 make it easier to obtain a desired contact surface of the pin 10 abutting the wall of the respective recess 22, 32. A larger contact surface is desirable to distribute the forces applied on the pin 10 by the first and second part 20, 30 over a larger area. The first radius R1 is suitably larger than the second radius R2. The first radius R1 enables a larger contact surface and the second radius R2 ensures that the pin 10 maintains relatively small in size compared to a pin with circular cross section having the larger radius. A compact pin 10 with increased strength is thereby achieved.

At least one curved section 12, 14 of the pin 10 is adapted to abut a wall of the recess 22 in the first part 20 and/or a wall of the recess 32 in the second part 30. The larger the radius of the curved section 12, 14, the larger is the contact surface of the pin 10 abutting the wall. Depending on the application in which the pin 10 is used, and thus depending on the recesses 22, 32, the at least one curved section 12, 14 may be adapted to abut the wall of a recess 22, 32 along the entire longitudinal extension of the section 12, 14 or at separate positions along the longitudinal extension of the section 12, 14.

In this embodiment the pin 10 functions as a cotter or a wedge in a groove 40 formed by the recess 22 in the first part 20 and the recess 32 in the second part 30. The groove 40 may be essentially v-shaped or u-shaped. Due to the configuration of the pin 10 with two different radiuses R1, R2, the pin 10 will, on its own motion, be arranged such that two sections 12 with the first radius R1 abut the wall of the recess 22 in the first part 20 and the wall of the recess 32 in the second part 30. Suitably, one curved section 12 with the first radius R1 abuts the wall of the recess 22 formed in the first part 20 and another curved section 12 with the first radius R1 abuts the wall of the recess 32 formed in the second part 30.

The pin 10 disclosed in Figure 1a has a smaller first radius R1 than the pin 10 disclosed in Figure 1b. The pin 10 as disclosed in Figure 1a thus has a somewhat more circular cross section. In Figure 1b, for clarity reasons, only one curved section 12 having the first radius R1 and one curved section 14 having the second radius R2 are given reference notations. Figure 1b discloses the width W of the pin 10 defined as the distance between two curved sections 14 having the second radius R2. The width W is suitably the diameter of the pin 10 at the widest point of the pin 10. If the first radius R1 is too large, the curved section 12 having the first radius R1 may be essentially straight. This is not desired. The first radius R1 may be similar to the width W of the pin 10 (R1=W). The first radius R1 may be within the range of 0,75W-2,5W. Within this range a sufficiently large contact surface will be achieved without causing tolerance problems.

In the embodiment shown in Figure 1c the cross section of the pin 10 is essentially triangular and comprises three curved sections 12 having the first radius R1 and three curved sections 14 having the second radius R2. The pin 10 thus comprises three sides 12 with the first radius R1 and three corners 14 with the second radius R2, the corners 14 connecting the sides 12. The first radius R1 is suitably larger than the second radius R2. The corners 14 are thus curved and have a smaller radius than the sides 12 of the pin 10. The pin 10 thus has a non-circular cross section but still comprises curved (convex) sections. The first radius R1 enables a larger contact surface and the second radius R2 ensures that the pin 10 maintains relatively small in size compared to a pin with circular cross section having the larger radius. A compact pin 10 with increased strength is thereby achieved. Also in this embodiment the pin 10 functions as a cotter or a wedge in a groove 40 formed by the recess 22 in the first part 20 and the recess 32 in the second part 30. The groove 40 may be essentially v-shaped or u-shaped. Due to the configuration of the pin 10 with the triangular shape and two different radiuses R1, R2, the pin 10 will, on its own motion, be arranged such that two sections 12 with the first radius R1 abut the wall of the recess 22 in the first part 20 and the wall of the recess 32 in the second part 30. Suitably, one curved section 12 with the first radius R1 abuts the wall of the recess 22 formed in the first part 20 and another curved section 12 with the first radius R1 abuts the wall of the recess 32 formed in the second part 30.

Figure 2a-e schematically illustrates a pin 10 for removable connection of a first part 20 and a second part 30 according to embodiments of the invention. The pin 10 is adapted to be arranged in a recess 22 formed in the first part 20 and a recess 32 formed in the second part 30, wherein the pin 10 has a cross section comprising a first radius R1 and a second radius R2, where the first radius R1 is different from the second radius R2. The first radius R1 is suitably larger than the second radius R2. As shown in figure 2a the pin 10 may constitute a part of a mechanical joint and may be adapted to be arranged in a through hole 50 formed in the first part 20 and the second part 30. Thus, the recess 22 formed in the first part 20 and the recess 32 formed in the second part 30 may be through holes, also called eyes. The first part 20 and the second part 30 are suitably arranged, such that the through holes of the parts 20, 30 are coaxially arranged, forming a longitudinally extending through hole 50. The pin 10 is adapted to be inserted in the through hole 50 and thereby connect the first part 20 and the second part 30 to each other. The hole in the first part 20 and the hole in the second part 30 suitably have the same radius R3. The relation between the first radius R1, the second radius R2 and the radius R3 of the through hole 50 will affect the contact surface of the pin 10. By using a pin 10 according to the invention with two different radiuses R1, R2 the contact surface between the pin 10 and the wall of the through hole 50 can be increased while keeping the pin 10 relatively small in size.

Figure 2b shows the pin 10 arranged in the through hole 50 where the crosssection of the pin 10 is essentially square shaped and comprises four curved sections 12 having the first radius R1 and four curved sections 14 having the second radius R2. Thus, the pin 10 comprises four sides 12 with the first radius R1 and four corners 14 with the second radius R2, the corners 14 connecting the sides 12. The pin 10 thus has a non-circular cross section but still comprises curved (convex) sections. The pin 10 may be elongated with a centre axis (not shown). The curved sections 12, 14 are suitably convex in relation to the centre axis of the pin 10. The convex sections 12, 14 make it easier to obtain a desired contact surface of the pin 10 abutting the wall of the through hole 50. A larger contact surface is desirable to distribute the forces applied on the pin 10 by the first and second part 20, 30 over a larger area.

Figure 2c shows the pin 10 as disclosed in figure 2a and 2b being configured, such that the first radius R1 is larger than the second radius R2 and the radius R3 of the through hole 50, and such that the second radius R2 is smaller than the radius R3 of the through hole 50. In such an embodiment at least two curved sections 14 having the second radius R2 will abut the inside wall of the through hole 50 when the pin 10 is arranged to connect the first part 20 and the second part 30. This way, a larger total contact surface is achieved.

Figure 2d shows the pin 10 as disclosed in figure 2a and 2b being configured, such that the first radius R1 is similar to the radius R3 of the through hole 50 and such that the first radius R1 is larger than the second radius R2. In such an embodiment at least one curved section 12 having the first radius R1 will abut the inside wall of the through hole 50 when the pin 10 is arranged to connect the first part 20 and the second part 30. Since the first radius R1 is similar to the radius R3 of the hole 50, the contact surface between the pin 10 and the wall of the through hole 50 will be increased.

Figure 2e shows the pin 10 as disclosed in figure 2a and 2b being configured, such that the first radius R1 is smaller than the radius R3 of the through hole 50 and larger than the second radius R2. In such an embodiment at least one curved section 12 having the first radius R1 will abut the inside wall of the through hole 50 when the pin 10 is arranged to connect the first part 20 and the second part 30.

Thus, depending on the radius R3 of the through hole 50, the pin 10 may be configured with a first radius R1 and a second radius R2, such that a desired contact surface is achieved.

Figure 3a schematically illustrates an exploded view of a suspension device 60 for removable attachment of a component 6 to a vehicle structure 8 according to an embodiment of the invention. Figure 3b schematically illustrates a view of an assembled suspension device 60 for removable attachment of a component 6 to a vehicle structure 8 according to an embodiment of the invention. The suspension device 60 comprises: a first part 100 adapted to be mounted on the component 6; a second part 200 adapted to be mounted on the vehicle structure 8; and a first locking arrangement 300 and a second locking arrangement 400, adapted to lock the first and second part 100, 200 to each other. The first part 100 and the second part 200 may be referred to as brackets. The suspension device 10 further comprises a locking sleeve 500, wherein the first locking arrangement 300 and the second locking arrangement 400 are adapted to be screwed into said locking sleeve 500 from opposite sides, such that the first locking arrangement 300 and the second locking arrangement 400 applies a clamping force on the first and second bracket 100, 200. By using a common locking sleeve 500 the locking arrangements 300, 400 will move towards each other when being screwed into the locking sleeve 500. This way, the locking arrangements 300, 400 will form a clamping connection locking the first part 100 and the second part 200 to each other. Also, the locking sleeve 500 enables separation of the first part 100 and the second part 200 by only unscrewing one of the locking arrangements 300, 400. This way, the suspension device 60 enables attachment/disassembly from two different directions.

The first part 100 may be elongated with a cross-section that is essentially ushaped. The first part 100 may thus comprise a base plate 110 and two parallel side portions 120’, 120” extending perpendicularly to the base plate 110. The side portions 120’, 120” may extend along at least a part of the longitudinal extension of the base plate 110. The side portions 120’, 120” each comprises an upper recess 130’, 130” and a lower recess 140’, 140”. The recesses 130’, 130”, 140’, 140” are suitably configured such that each side portion 120’, 120” has a waist. The lower recesses 140’, 140” may form a hanging portion 150 of the first part 100. The first part 100 may also comprise an attachment portion (not shown) for attachment of the first part 100 to the component 6. The first part 100 may be made of castings.

The second part 200 may be elongated with a cross-section that is essentially u-shaped. The second part 200 may thus comprise a base plate 210 and two parallel side portions 220’, 220” extending perpendicularly to the base plate 210. The side portions 220’, 220” each comprises an upper recess 230’, 230”. The second part 200 also comprises recesses in the shape of slots 240’, 240”, one in each side portion 220’, 220”. The slots 240’, 240” may be inclined downwards towards the base plate 210. The second part 200 may also comprise an attachment portion 260 for attachment of the second part 200 to the vehicle structure 8. The second part 200 may be made of bent sheet metal.

The first locking arrangement 300 and the second locking arrangement 400 each comprises a fastener 310, 410 and a pin 320, 420. The pin 320, 420 may be configured as disclosed in Figures 1a-c. The pin 320, 420 comprises a centred opening 322, 422 through which the fastener 310, 410 is adapted to extend. The fastener 310, 410 and the pin 320, 420 are thus adapted to be arranged such that they extend essentially perpendicularly to each other. The fasteners 310, 410 are adapted to be arranged with the rotational axis A in parallel with the longitudinal extension of the second part 200. The pin 320 of the first locking arrangement 300 may be adapted to extend through the slots 240’, 240” in the second part 200.

The threaded locking sleeve 500 is adapted to be arranged inside the second part 200, such that it is surrounded by the base plate 210 and the side portions 220’, 220” of the second part 200. The second part 200 may comprise a latch 270 restricting movement of the locking sleeve 500 in direction upwards. The latch 270 may comprise wings (not shown) adapted to interact with protruding portions 510 of the locking sleeve 500, such that the wings prevent rotation of the locking sleeve 500. This way, the locking arrangements 300, 400 can be screwed into the locking sleeve 500 without needing an extra tool to hold the locking sleeve 500 still.

Figure 3b shows the suspension device 60 assembled but without the component and the vehicle structure. The first part 100 and the second part 200 have corresponding shapes and are arranged, such that the first part 100 surrounds the second part 200. Thus, the side portions 120’, 120” of the first part 100 are arranged outside the side portions 220’, 220” of the second part 200 and the base plate 110 of the first part 100 is arranged outside the base plate 210 of the second part 200. The first part 100 may be arranged such that the base plate 110 of the first part 100 abuts the base plate 210 of the second part. The first part 100 may be referred to as a female part and the second part 200 may be referred to as a male part. The first part 100 is hanging with the hanging portion 150 on the pin 320 of the first locking arrangement 300. The first locking arrangement 300 may thus serve as a “third hand” when attaching the component to the vehicle structure. The first bracket 100 is suitably hanging on a part of the pin 320 that is extending through the slots 240’, 240” on the outside of the side portions 220’, 220”. The pin 420 of the second locking arrangement 400 rests in a groove 600 at the upper part of the first part 100 and the upper part of the second part 200. The groove 600 is formed by the upper recesses 130’, 130” of the first part 100 and the upper recesses 230’, 230” of the second part 200. The groove 600 may be essentially v-shaped or u-shaped. The fasteners 310, 410 of the locking arrangements 300, 400 are screwed into the locking sleeve 500 from opposite directions and the pins 320, 420 of the first and second locking arrangements 300, 400 move towards each other and thereby apply a clamping force on the first part 100 and the second part 200. Also, due to the upper and lower recesses 130’, 130”, 140’, 140” in the first part 100 and the configuration of the pins 320, 420, a pressing force will be applied on the first part 100, such that it is pressed towards the vehicle structure 8 and thus the second part 200. With the first part 100 and the second part 200 tightly and firmly connected, the load on the first part 100 will be transferred to the vehicle structure 8 in a better way, instead of affecting the suspension device 60.

Figures 4a-4c illustrates applications for a suspension device 60 for removable attachment of a component 6 to a vehicle structure 8 according to embodiments of the invention. The suspension device 60 may be configured as disclosed in Figure 3a-3b. Figure 4a illustrates an application for the suspension device 60 where the component 6 is a gas tank arrangement and the vehicle structure 8 is a vehicle frame. As illustrated in Figure 4a the component 6 may be attached to the vehicle structure 8 by means of one or more suspension devices 60, for example two suspension devices 60. Figure 4b illustrates how the suspension device 60 may be used for attachment of a fuel tank bracket 6 to a vehicle structure. In Figure 4b only the first bracket 100 is shown. Figure 4c illustrates an application for the suspension device 60 where the component 6 is a silencer. In Figure 4c only the first bracket 100 is shown.

Figure 5 schematically shows a side view of a vehicle 1 comprising a propulsion unit 2. The propulsion unit 2 may be a gas engine, a diesel engine or and electric machine. The vehicle 1 may further comprise at least one component 6 attached to a vehicle structure 8. The component 6 may be a gas tank arrangement, a silencer, a diesel tank or similar. The vehicle structure 8 may be the vehicle frame. The component 6 is suitably attached to the vehicle structure 8 by means of a suspension device 60 as disclosed in Figure 3a and 3b. The vehicle 1 may be a heavy vehicle, e.g. a truck or a bus. The vehicle may be manually operated, remotely operated or autonomously operated.

The foregoing description of the preferred embodiments of the present invention is provided for illustrative and descriptive purposes. It is not intended to be exhaustive or to restrict the invention to the variants described. Many modifications and variations will obviously be apparent to one skilled in the art. The embodiments have been chosen and described in order best to explain the principles of the invention and its practical applications and hence make it possible for specialists to understand the invention for various embodiments and with the various modifications appropriate to the intended use.

Claims

1. A pin (10; 320; 420) for removable connection of a first part (20; 100) and a second part (30; 200), the pin (10; 320; 420) being adapted to be arranged in a recess (22; 130’, 130”, 140’, 140”) formed in the first part (20; 100) and a recess (32; 230’ 230”, 240’, 240”) formed in the second part (30; 200), wherein the pin (10; 320; 420) constitutes a wedge in a mechanical joint and is adapted to be arranged in a groove (40) formed by the recess (22) in the first part (20) and the recess (32) in the second part (30), characterised in that the pin (10; 320; 420) has a cross section comprising a first radius (R1) and a second radius (R2), where the first radius (R1) is different from the second radius (R2).

2. The pin (10; 320; 420) according to claim 1, wherein the cross-section of the pin (10; 320; 420) comprises at least two curved sections (12) having the first radius (R1) and at least two curved sections (14) having the second radius (R2).

3. The pin (10; 320; 420) according to claim 2, wherein at least one section (12; 14) is adapted to abut a wall of the recess (22) in the first part (20) and/or a wall of the recess (32) in the second part (30).

4. The pin (10; 320; 420) according to any of the preceding claims, wherein the cross section of the pin (10; 320; 420) is essentially triangular and comprises three sides (12) with the first radius (R1) and three corners (14) with the second radius (R2), the corners (14) connecting the sides (12).

5. The pin (10; 320; 420) according to any of claims 1-3, wherein the cross section of the pin (10; 320; 420) is essentially square shaped and comprises four sides (12) with the first radius (R1) and four corners (14) with the second radius (R2), the corners (14) connecting the sides (12).

6. The pin (10; 320; 420) according to any of the preceding claims, wherein the first radius (R1) is larger than the second radius (R2).

7. A mechanical joint comprising: a first part (20) comprising a recess (22); and a second part (30) comprising a recess (32); characterised by a pin (10) according to any of claims 1-6 for connecting the first part (20) and the second part (30) to each other.

8. A suspension device (60) for removable attachment of a component (6) to a vehicle structure (8), the suspension device (60) comprising: a first part (100) adapted to be mounted on the component (6); and a second part (200) adapted to be mounted on the vehicle structure (8); characterised by at least one pin (10; 320; 420) according to any of claims 1-6 for connecting the first part (100) and the second part (200) to each other.

9. The suspension device (60) according to claim 8, wherein it comprises a first pin (320) adapted to interact with lower recesses (140’, 140”, 240’, 240”) formed in the first part (100) and the second part (200) and a second pin (420) adapted to interact upper recesses (130’, 130”, 230’, 230”) formed in the first part (100) and the second part (200).

10. A vehicle (1) comprising a suspension device (60) according to any of claims 8-9.