Pin shaft end limiting device

Abstract

The utility model provides a pin shaft end portion limiting device which comprises a pin shaft, a limiting protrusion is fixedly arranged on one end portion of the pin shaft, and a limiting assembly is coaxially and rotatably sleeved on the other end portion of the pin shaft. The limiting assembly comprises a combined clamping ring and an integrated clamping ring which are arranged on the pin shaft side by side in the axial direction. A circular clamping groove extending in the circumferential direction is formed in the pin shaft corresponding to the combined clamping ring, and the combined clamping ring is rotatably embedded in the clamping groove; the combined clamping ring is of a circular ring structure formed by surrounding a plurality of arc-shaped clamping pieces in a surrounding mode, and the arc-shaped clamping pieces are connected with the integrated clamping ring in an axial locking mode through locking pieces. The arc-shaped clamping pieces in the combined clamping ring are fixed through the integrated clamping ring, axial limiting of the two ends of the pin shaft is achieved through the combined clamping ring and the limiting protrusions, and meanwhile the pin shaft can freely rotate relative to the limiting assembly due to the fact that the pin shaft is rotatably arranged on the limiting assembly in a penetrating mode. And single-side abrasion of the pin shaft caused by joint movement is avoided, and the pin shaft replacement and maintenance cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steel metallurgical equipment parts, especially a pin shaft end position limiting device. BACKGROUND

[0002] The existing pin shaft end position limiting structure mills a clamping groove at the end of the pin shaft, clamps a clamping plate with the same thickness and groove width into the clamping groove, and locks and fixes the clamping plate and the support through fasteners, so as to realize the limiting and fixing of the pin shaft end. Such pin shaft end position limiting structure not only realizes the axial limiting of the pin shaft, but also limits the rotation of the pin shaft through the clamping piece and the clamping groove, so that the pin shaft cannot rotate freely, which easily causes unilateral wear of the pin shaft during the joint movement of the pin shaft, greatly shortens the service life of the pin shaft, and increases the maintenance frequency and the consumption cost of the vulnerable parts. SUMMARY

[0003] The utility model discloses a kind of pin shaft end position limiting devices, utilize two clamping rings to be locked together by bolt, the axial limiting of pin shaft end is carried out simultaneously, and also make pin shaft can rotate freely, avoid the joint movement of the pin shaft during the pin shaft being equipped, which leads to unilateral wear of the pin shaft, saves replacement pin shaft and maintenance cost.

[0004] A pin shaft end position limiting device, comprising a pin shaft, a limiting protrusion is fixed on one end of the pin shaft, and a limiting assembly is coaxially rotatably installed on the other end of the pin shaft.

[0005] The limiting assembly comprises a combined clamping ring and an integrated clamping ring arranged on the pin shaft in parallel along the axial direction.

[0006] The pin shaft corresponding to the combined clamping ring is provided with a circular clamping groove extending in the circumferential direction, and the combined clamping ring is rotatably embedded in the clamping groove.

[0007] The combined clamping ring is a circular ring structure composed of a plurality of arc-shaped clamping pieces, and each arc-shaped clamping piece is axially locked and connected with the integrated clamping ring through a locking member.

[0008] The combined clamping ring is unable to move axially due to the combined clamping ring being embedded in the clamping groove; meanwhile, the combined clamping ring is designed in a split structure composed of a plurality of arc-shaped clamping pieces, which provides conditions for being embedded in the clamping groove for installation, and the fixing of the arc-shaped clamping pieces in the combined clamping ring and the fixed forming of the combined clamping ring are realized by using the integral clamping ring. The limiting assembly composed of the combined clamping ring and the integral clamping ring is matched with the limiting protrusion to realize the axial limiting of the two end portions of the pin shaft, meanwhile, the pin shaft is rotatably arranged on the limiting assembly, so that the pin shaft can freely rotate relative to the limiting assembly, the unilateral wear of the pin shaft caused by the joint movement of the pin shaft is avoided, and the replacement and maintenance costs of the pin shaft are saved.

[0009] Further, the inner surfaces of the arc-shaped clamping pieces together surround to form a combined clamping ring shaft hole, the diameter of the combined clamping ring shaft hole is < the diameter of the pin shaft, and the difference between the diameter of the combined clamping ring shaft hole and the diameter of the pin shaft is less than the depth of the clamping groove, and the width of the combined clamping ring is < the width of the clamping groove, so that the combined clamping ring is embedded in the clamping groove while being freely rotatable in the clamping groove.

[0010] Further, the integral clamping ring has an integral clamping ring shaft hole, and the diameter of the integral clamping ring shaft hole is > the diameter of the pin shaft.

[0011] Further, the arc-shaped clamping piece is provided with a first locking through hole, the integral clamping ring is provided with a second locking through hole corresponding to the first locking through hole of each arc-shaped clamping piece, and the locking piece is arranged in the first locking through hole and the corresponding second locking through hole.

[0012] Further, the limiting protrusion is a ring-shaped protrusion structure integrally formed with the pin shaft.

[0013] Further, the integral clamping ring is located on the side of the combined clamping ring away from the limiting protrusion. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure diagram of the pin shaft of the utility model;

[0015] Figure 2 It is a front view of the pin shaft end portion limiting device of the utility model in the installation state;

[0016] Figure 3 It is a right view of the pin shaft end portion limiting device of the utility model in the installation state;

[0017] Figure 4 It is a sectional view structure diagram of the pin shaft end portion limiting device of the utility model along the A-A line; Figure 3 ​

[0018] Figure 5 The structure diagram of the combined clasp of the utility model, the pin shaft is a sectional view structure diagram;

[0019] Figures 1-3 The dotted line in the figure is the center axis of the pin shaft, Figure 5 The dotted line in the figure is the center axis of the pin shaft, DETAILED DESCRIPTION

[0020] The preferred embodiment of the pin shaft end position limiting device of the utility model will be described in detail below in combination with the drawings.

[0021] In combination Figures 1-5 A pin shaft end position limiting device, comprising a pin shaft 10, a limiting protrusion 11 is fixed on one end of the pin shaft 10, and a limiting assembly 20 is coaxially rotatably sleeved on the other end of the pin shaft 10.

[0022] The limiting assembly 20 comprises a combined clasp 21 and an integrated clasp 22 which are arranged on the pin shaft 10 in parallel along the axial direction.

[0023] The pin shaft 10 is provided with a circular clamping groove 12 extending in the circumferential direction corresponding to the combined clasp 21, and the combined clasp 21 is rotatably embedded in the clamping groove 12.

[0024] The combined clasp 21 is a circular ring structure formed by circumferential combination of two arc-shaped clamping pieces 210, and each arc-shaped clamping piece 210 is axially locked and connected with the integrated clasp 22 through a locking piece 30.

[0025] When the pin shaft end position limiting device is installed, the pin shaft 10 is horizontally arranged on the support 40, the support 40 is usually two and is arranged in interval, and the joint 50 of the metallurgical mechanical equipment is installed on the pin shaft 10 between the two supports 40. The two ends of the pin shaft 10 respectively pass through two pin shaft mounting holes 41 on the two supports 40, and the limiting protrusion 11 and the limiting assembly 20 are respectively clamped outside the two pin shaft mounting holes 41 for limiting.

[0026] The combination clamping ring 21 is embedded in the clamping groove 12, so that the combination clamping ring 21 cannot move axially; meanwhile, the combination clamping ring 21 is designed in a split structure composed of a plurality of arc clamping pieces 210, which provides conditions for being embedded in the clamping groove 12 for installation, and the integral clamping ring 22 is used to realize the fixation of the arc clamping pieces 210 in the combination clamping ring 21 and the fixed forming of the combination clamping ring 21. The limiting assembly 20 composed of the combination clamping ring 21 and the integral clamping ring 22 cooperates with the limiting protrusion 11 to realize the axial limiting of the both ends of the pin shaft 10, meanwhile, the pin shaft 10 can be rotatably arranged on the limiting assembly 20, so that the pin shaft 10 can rotate freely relative to the limiting assembly 20, the unilateral wear of the pin shaft 10 caused by the movement of the joint 50 sleeved on the pin shaft 10 is avoided, and the replacement and maintenance costs of the pin shaft 10 are saved.

[0027] Of course, the number of the arc clamping pieces 210 possessed by the combination clamping piece 21 can be more than two, as long as all the arc clamping pieces 210 can be circumferentially combined to form a ring structure.

[0028] Further, in combination with Figure 4 and Figure 5 , the inner surfaces of the arc clamping pieces 210 together surround to form a combination clamping ring shaft hole 211, the hole diameter r' of the combination clamping ring shaft hole 211 is less than the diameter R of the pin shaft 10, and the difference between the hole diameter r' of the combination clamping ring shaft hole 211 and the diameter R of the pin shaft 10 is less than the depth H of the clamping groove 12, the width of the combination clamping ring 21 is less than the width of the clamping groove 12, so that the combination clamping ring 21 can be embedded in the clamping groove 12 while being freely rotatable in the clamping groove 12.

[0029] Further, as shown in Figure 3 , the integral clamping ring 22 has an integral clamping ring shaft hole 221, and the hole diameter r of the integral clamping ring shaft hole 221 is greater than the diameter R of the pin shaft 10.

[0030] As shown in Figure 4 , the arc clamping piece 210 is provided with a first locking through hole 212, the integral clamping ring 22 is provided with a second locking through hole 222 corresponding to the first locking through hole 212 of each arc clamping piece 210, and the locking piece 30 is arranged in the first locking through hole 212 and the corresponding second locking through hole 222. In the specific implementation process, the locking piece 30 can adopt a locking screw.

[0031] As shown in Figure 1 , Figure 2 , Figure 4As shown, the limiting protrusion 11 is a ring-shaped protrusion structure integrally formed with the pin shaft 10. Of course, the limiting protrusion 11 can also be a limiting structure assembled with the pin shaft for use, such as a bolt structure and the like.

[0032] Preferably, as shown, Figure 4 As shown, the integral snap ring 22 is located on the side of the combined snap ring 21 away from the limiting protrusion 11. Of course, the integral snap ring 22 can be, but is not limited to, located on the side of the combined snap ring 21 away from the limiting protrusion 11, and it can also be located on the side of the combined snap ring 21 close to the limiting protrusion 11.

[0033] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent process transformation or direct or indirect application in other related technical fields using the content of the present application is also included in the patent protection range of the present application.

Claims

1. A pin shaft end position limiting device, comprising a pin shaft, a limiting protrusion being fixed on one end of the pin shaft, and a limiting assembly being coaxially sleeved on the other end of the pin shaft; characterized in that: the limiting assembly comprises a combined clamping ring and an integrated clamping ring which are arranged on the pin shaft in parallel along the axial direction; the combined clamping ring is provided with a circular clamping groove extending in the circumferential direction on the pin shaft, and the combined clamping ring is rotatably embedded in the clamping groove; the combined clamping ring is a circular ring structure composed of a plurality of arc-shaped clamping pieces, and each arc-shaped clamping piece is axially locked and connected with the integrated clamping ring by a locking member.

2. The trunnion end stop of claim 1, wherein: The inner surfaces of each arc-shaped clamping piece together form a combined clamping ring shaft hole, the diameter of the combined clamping ring shaft hole is less than the diameter of the pin shaft, and the difference between the diameter of the combined clamping ring shaft hole and the diameter of the pin shaft is less than the depth of the clamping groove, and the width of the combined clamping ring is less than the width of the clamping groove.

3. The trunnion end stop of claim 1, wherein: The integrated clamping ring has an integrated clamping ring shaft hole, and the diameter of the integrated clamping ring shaft hole is greater than the diameter of the pin shaft.

4. The trunnion end stop of claim 1, wherein: The arc-shaped clamping piece is provided with a first locking through hole, the integrated clamping ring is provided with a second locking through hole corresponding to the first locking through hole of each arc-shaped clamping piece, and the locking member is arranged in the first locking through hole and the corresponding second locking through hole.

5. The trunnion end stop of claim 1, wherein: The limiting protrusion is a ring-shaped protrusion structure integrally formed with the pin shaft.

6. The trunnion end stop of claim 1, wherein: The integrated clamping ring is located on the side of the combined clamping ring away from the limiting protrusion.

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