CN215762675U - Elastic cylindrical pin - Google Patents

Abstract

The utility model relates to an elastic cylindrical pin, which comprises a pin body with a hole, wherein the pin body comprises a first part, a second part and a third part, and the first part, the second part and the third part are sequentially connected to form an integrated structure; the third portion has an outer diameter less than an outer diameter of the first portion. The pin body is formed by connecting the first part, the second part and the third part, the outer diameter of the third part is smaller than that of the first part, the length of the third part is set to 1/3-2/3 of the length of the pin body, the third part of the pin body can be directly connected and positioned in the third hole of the shaft sleeve and the second hole of the shaft during assembly, the positioning function of the shaft sleeve and the shaft body is achieved, a traditional alignment tool is omitted, and the problem that the assembly efficiency is affected due to the fact that the assembly space is limited and the alignment tool needs to be added is avoided.

Description

Elastic cylindrical pin

Technical Field

The utility model relates to the field of pins, in particular to an elastic cylindrical pin.

Background

The main function of the elastic cylindrical pin is used for connection between a hole of a shaft and a hole of a shaft sleeve, and at present, the common elastic cylindrical pin has the following problems in connection due to short chamfer length:

the quick counterpoint is realized with the hole of axle sleeve to unable accuracy, if need realize quick counterpoint and need design dedicated location frock, but because the assembly environment is narrow and small, above-mentioned location frock is inconvenient to use, and causes the non-concentricity between the hole of shaft hole and axle sleeve easily, has increased the installation degree of difficulty of elastic pin, wastes time and energy.

Need the handheld cylindric lock of operation personnel to fix a position the direction before the assembly, and can't guarantee that the axial of cylindric lock is perpendicular with the mounting plane, and out of plumb can be in the assembling process lead to the cylindric lock slope when the assembly atress, can make it be pounded the bending and buckling on the one hand knocking the cylindric lock, and on the other hand leads to the cylindric lock to be pounded and fly away, brings the incident hidden danger.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a resilient cylindrical pin that solves one or more problems of the prior art.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the elastic cylindrical pin comprises a pin body with a hole, wherein the pin body comprises a first part, a second part and a third part which are sequentially connected to form an integrated structure; the third portion has an outer diameter less than an outer diameter of the first portion.

The length of the third portion is 1/3-2/3 of the length of the pin body.

The pin body has a groove that opens in the axial direction in the pin body.

The grooves comprise a first groove and a second groove connected with the first groove, the first groove is arranged on the first portion, and the second groove is arranged on the third portion.

The groove width of the first groove is larger than that of the second groove, and the groove width of the far end of the first groove is gradually reduced towards the second groove.

The groove width of the second groove accounts for 10% -100% of the groove width of the first groove.

The bore diameter of the bore decreases from the proximal end of the pin body to the distal end of the pin body.

The first portion has a first chamfer at a proximal end thereof.

A second chamfer is provided at a distal end of the third portion.

Compared with the prior art, the utility model has the following beneficial technical effects:

the pin body is formed by connecting the first part, the second part and the third part, the outer diameter of the third part is smaller than that of the first part, the length of the third part is set to 1/3-2/3 of the length of the pin body, the third part of the pin body can be directly connected and positioned in the third hole of the shaft sleeve and the second hole of the shaft during assembly, the positioning function of the shaft sleeve and the shaft body is achieved, traditional alignment tools are omitted, and the problem that assembly efficiency is affected due to the fact that the alignment tools need to be increased due to the fact that assembly space is limited is avoided.

(II) above-mentioned third part sets up certain length and still can guarantee that the round pin body is stably stood upright in the third hole of axle sleeve and the second hole of axle, and then needs the handheld product of operation personnel to keep stable problem among the avoiding traditional assembly methods, further avoids the problem of the potential safety hazard because of the handheld location of staff causes.

And (III) a groove is formed in the pin body and is composed of a first groove and a second groove, the groove width of the first groove is larger than that of the second groove, the third part has contractibility due to the second groove, and the outer diameter of the third part can be reduced within a certain range through contraction when the shaft body and the hole of the shaft sleeve deviate, so that the cylindrical pin is further assembled.

And (IV) chamfers are respectively arranged on the first part and the third part, so that burrs generated by machining can be removed, and further assembly of the cylindrical pin, the shaft body and the shaft sleeve is facilitated.

Drawings

Fig. 1 shows a schematic structural diagram of an elastic cylindrical pin according to an embodiment of the present invention.

Fig. 2 is a schematic view showing an assembly structure of the elastic cylindrical pin according to the embodiment of the utility model.

In the drawings, the reference numbers: 1. a pin body; 101. a first portion; 1011. a first chamfer; 102. a second portion; 103. a third portion; 1031. a second chamfer; 104. a first groove; 105. a second groove; 106. a first hole; 2. a shaft body; 201. a second hole; 3. a shaft sleeve; 301. a third aperture; 302. and a fourth aperture.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following is a detailed description of the elastic cylindrical pin according to the present invention with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

In order to describe the structure of the elastic cylindrical pin more clearly, the present invention defines the terms "distal end" and "proximal end", specifically, the "distal end" refers to the end of the cylindrical pin assembled with the bushing, and the "proximal end" refers to the end of the cylindrical pin away from the bushing, taking fig. 1 as an example, the right side of the cylindrical pin in fig. 1 is the distal end, and the left side of the cylindrical pin in fig. 1 is the proximal end.

The elastic cylindrical pin has the following specific structure:

referring to fig. 1, the cylindrical pin includes a pin body 1 having a first hole 106, and the first hole 106 is formed through the center of the pin body 1 along an axial direction. The pin body 1 comprises a first part 101, a second part 102 and a third part 103, wherein the first part 101, the second part 102 and the third part 103 are connected in sequence to form an integral structure.

Further, with reference to fig. 1, the outer diameter of the third portion 103 is smaller than the outer diameter of the first portion 101, and since the outer diameter of the third portion 103 is smaller than the outer diameter of the first portion 101, the second portion 102 connected to the first portion 101 and the third portion 103 forms a tapered structure, specifically, the outer diameter of the proximal end of the second portion 102, i.e. the end connected to the distal end of the first portion 101, is larger, and the outer diameter of the distal end of the second portion 102, i.e. the end connected to the proximal end of the third portion 103, is smaller.

Further, with continued reference to fig. 1, the length L1 of the third portion 103 is 1/3-2/3 of the length of the pin body 1, and preferably, the length L1 of the third portion 103 is 1/3 of the length of the pin body 1 according to the embodiment of the present invention.

Further, with continued reference to fig. 1, the pin body 1 has a groove, and the groove is axially opened on the outer side of the pin body 1. Specifically, the grooves include a first groove 104 and a second groove 105 connected to the first groove 104, the first groove 104 is opened in the first portion 101, and the second groove 105 is opened in the third portion 103. Wherein the groove width of the first groove 104 is larger than the groove width of the second groove 105, and the groove width of the distal end of the first groove 104 decreases toward the second groove 105. The groove width of the second groove 105 accounts for 10% -100% of the groove width of the first groove 104.

Accordingly, in other embodiments of the present invention, the second groove 105 may be eliminated and only the first groove 104 may be reserved, or the groove width of the second groove 105 may reach a minimum value and approach to be closed, and the strength of the whole pin body 1 may be effectively ensured by reserving the first groove 104.

The contractibility of the third portion 103 can be increased by forming the second groove 105 on the third portion 103 of the pin body 1, so that when the bore diameter of the shaft body 2 or the shaft sleeve 3 to be assembled deviates from the standard bore diameter, that is, the third portion 103 can also be contracted in a small range through the second groove 105 and the outer diameter of the third portion 103 is reduced in a certain range, so as to be connected to the second bore 201 of the shaft body 2 or the third bore 301 of the shaft sleeve 3. Also, the provision of the first groove 104 can further increase the structural strength of the first portion 101, and the first groove 104 can effectively disperse the pressure of knocking against the first portion 101 during assembly, thereby avoiding stress concentration.

Further, with continued reference to fig. 1, the diameter of the first hole 106 decreases from the proximal end of the pin body 1 to the distal end of the pin body. And has a first chamfer 1011 at the proximal end of the first portion 101. The third portion 103 has a second chamfer 103 at its distal end, and the first chamfer 1011 is provided to remove machining burrs and to facilitate further assembly of the cylindrical pin with the shaft body 2 and the sleeve 3.

The specific assembly process of the utility model is as follows:

referring to fig. 2, during assembly, the shaft sleeve 3 is sleeved outside the shaft body 2, and the second hole 201 inside the shaft body 2 and the hole centers of the third hole 301 and the fourth hole 302 of the shaft sleeve 3 are within a deviation range. Because the outer diameter of the third part 103 is smaller than that of the first part 101, and the length of the third part 103 is set to 1/3 of the length of the pin body 1, the third part 103 can be directly inserted into the third hole 301 and extend into the second hole 201 of the shaft body 2 during assembly, and then the second hole 201 and the third hole 301 are aligned at the same time, so that the design and the use of an alignment tool are reduced, and the problem that the assembly efficiency is affected by the fact that the alignment tool needs to be added due to limited assembly space is avoided. The length of the third part 103 can also enable the third part 103 to be stably vertical to the third hole 301 and the second hole 201 after being assembled in the third hole 301 and the second hole 201, namely, the axis of the pin body 1 is concentric with the axes of the third hole 301 and the second hole 201, so that the stability of the pin body is ensured without being held by hands of an operator, and the two hands of the operator are released, thereby avoiding the potential safety hazard problem caused by the fact that the operator holds the pin body by hands to position the pin body.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. Elasticity cylindric lock, its characterized in that: the cylindrical pin comprises a pin body with a hole, the pin body comprises a first part, a second part and a third part, and the first part, the second part and the third part are sequentially connected to form an integrated structure; the third portion has an outer diameter less than an outer diameter of the first portion.

2. A resilient cylindrical pin as claimed in claim 1, wherein: the length of the third portion is 1/3-2/3 of the length of the pin body.

3. A resilient cylindrical pin as claimed in claim 1, wherein: the pin body has a groove that opens in the axial direction in the pin body.

4. A resilient cylindrical pin as claimed in claim 3, wherein: the grooves comprise a first groove and a second groove connected with the first groove, the first groove is arranged on the first portion, and the second groove is arranged on the third portion.

5. A resilient cylindrical pin as claimed in claim 4, wherein: the groove width of the first groove is larger than that of the second groove, and the groove width of the far end of the first groove is gradually reduced towards the second groove.

6. A resilient cylindrical pin as claimed in claim 5, wherein: the groove width of the second groove accounts for 10% -100% of the groove width of the first groove.

7. A resilient cylindrical pin as claimed in claim 1, wherein: the bore diameter of the bore decreases from the proximal end of the pin body to the distal end of the pin body.

8. A resilient cylindrical pin as claimed in claim 1, wherein: the first portion has a first chamfer at a proximal end thereof.

9. A resilient cylindrical pin as claimed in claim 1, wherein: a second chamfer is provided at a distal end of the third portion.

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