Device for assisting in pulling and placing pin shaft

Abstract

A device for assisting in pulling and placing a pin shaft comprises a first connecting piece, a second connecting piece, a supporting part and an adjusting mechanism. Wherein one end of the first connecting piece and one end of the second connecting piece are each connected with a set of supporting parts, the supporting part corresponding to the first connecting piece is used for fixing the installation position where the connecting pin shaft is located, the supporting part corresponding to the second connecting piece is used for fixing the end, away from the installation position, of the connecting pin shaft, and the adjusting mechanism is connected to the first connecting piece and the second connecting piece. The distance between the first connecting piece and the second connecting piece is adjusted, and the moving speed of the pin shaft is slowed down. The device for assisting in pulling and placing the pin shaft is simple and compact in structure, small in required operation space, visual in operation length change, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting machinery, in particular to a device for assisting in pulling out and releasing a pin shaft. Background Art

[0002] like Figure 1 and Figure 2 As shown, the pin-type boom of the crane needs to be connected to the cylinder flange of the upper boom cylinder by locking the pin shaft 10 at the tail of the boom cylinder in the extended state. During the assembly and maintenance of the boom cylinder, it is necessary to manually pull and release the pin to release and lock the fixed relationship between the pin shaft 10 and the cylinder flange, so that the two adjacent boom sections can be extended and retracted to achieve the change of the boom length. Manual pin pulling requires compressing the spring 102 set on the outside of the pin shaft, and continuously applying external force to maintain deformation. Releasing the pin requires continuously applying external force to slowly release the set spring 102. Too fast rebound can easily damage the working pin and pose a risk of safety accidents.

[0003] like Figure 1 and Figure 2 As shown, the direction indicated by the arrow is the direction of pressure applied by the weight. At present, when pulling out the pin by gravity, it is necessary to manually lift and slowly adjust the position of the weight so that the top of the pin shaft 10 is as close to the geometric center position of the bottom of the weight as possible, and rely on the gravity of the weight to overcome the deformation of the spring 102, press the pin shaft 10 to the bottom, complete the pin pulling action, and use a fixed support rod to fix the stroke of the pin shaft 10, that is, the distance between the mounting surface on the mounting part 101 where the pin shaft 10 is located and the upper end surface of the pin pulling rod 103. This method has low working efficiency and is easy to damage the surface coating of the pin shaft 10. If the position of the weight is offset, it is easy to cause the weight to fall, and there are certain safety hazards in operation. During the manual release of the pin, the weight needs to be lifted to press the pin shaft first, and then the fixed support rod 104 of the pin shaft is pried out, and then the weight is slowly lifted off, and the pin shaft 10 relies on its own elastic force to release the pin by itself.

[0004] Chinese patent CN 110230263 A discloses a device for assisting the insertion and extraction of a pin shaft, comprising: a sleeve for abutting against the outer structure where the pin shaft needs to be inserted and extracted; a pull rod, which is arranged inside the sleeve, and one end of the pull rod is detachably connected to the pin shaft, and the other end of the pull rod is fixedly connected to a jack or threadedly connected to a drive pipe after passing through the sleeve; a jack for tensioning the pull rod to insert and extract the pin shaft; a drive pipe for screwing the pull rod to insert and extract the pin shaft, which can ensure high operating accuracy and reduce the probability of damaging the pin shaft structure during operation, and is simple to operate and reduces the requirements for the operating environment. The device for assisting the insertion and extraction of a pin shaft in this patent has the problem of a complex structure and a large required working space. Utility Model Content

[0005] In view of this, the utility model provides a device for assisting in pulling out and releasing a pin shaft, which has a simple and compact structure, requires a small working space, and can change the working length intuitively, and is safe and reliable.

[0006] The utility model provides a device for assisting the pulling and releasing of a pin shaft, comprising a first connecting member, a second connecting member, a supporting part and an adjusting mechanism; wherein one end of the first connecting member and the second connecting member are respectively connected to a group of supporting parts, the supporting part corresponding to the first connecting member is used to fix the installation part where the connecting pin shaft is located, and the supporting part corresponding to the second connecting member is used to fix the end of the connecting pin shaft away from the installation part, and the adjusting mechanism is respectively connected to the first connecting member and the second connecting member to adjust the distance between the first connecting member and the second connecting member and slow down the moving speed of the pin shaft.

[0007] In one embodiment, the adjustment mechanism includes a sleeve and a rotation drive assembly, wherein the first connecting member and the second connecting member are respectively provided with external threads of opposite rotation, the sleeve is sleeved on the first connecting member and the second connecting member, and the sleeve is provided with internal threads of opposite rotation that are respectively engaged with the external threads, and the output end of the rotation drive assembly is fixedly connected to the outer side of the sleeve to drive the sleeve to rotate and adjust the distance between the first connecting member and the second connecting member.

[0008] In one embodiment, the rotation drive assembly includes a housing, a worm, a transmission member, a gear and a worm fixing portion, wherein the worm fixing portion is fixedly connected to the housing, the transmission member passes through the housing and the worm in sequence and is fixedly connected to the worm, the transmission member is rotatably connected to the worm fixing portion and the housing, the gear is disposed in the housing and meshes with the worm, the gear is fixedly sleeved in a sleeve, the sleeve is passed through the housing and is rotatably connected to the housing.

[0009] In one embodiment, a reaction force arm is further provided on the housing, the installation position of the reaction force arm on the housing and the installation position of the sleeve are both on the width center line of the housing, and the reaction force arm is located on a side of the housing away from the gear.

[0010] In one embodiment, a positioning structure is provided at the driving end of the transmission member, and the positioning structure is used to engage with the output end of the rotating driving member.

[0011] In one embodiment, the sleeve is a polygonal square rod structure, and a polygonal mounting hole matching the polygonal square rod structure is provided at the center of the gear.

[0012] In one embodiment, the rotation driving component is a torque multiplier, and the output end of the torque multiplier is fixedly sleeved on the sleeve.

[0013] Similarly, the rotation drive assembly is set as a torque multiplier, which can also realize the rotation of the rotation drive sleeve, thereby ensuring that the working process of the entire device for assisting the pulling and releasing of the pin shaft is stable and reliable to a great extent.

[0014] In one embodiment, the adjusting mechanism is any one of a telescopic oil cylinder, a telescopic air cylinder and an electric cylinder, the cylinder barrel of the adjusting mechanism is fixedly connected to the first connecting member, and the cylinder rod of the adjusting mechanism is fixedly connected to the second connecting member, so that the distance between the first connecting member and the second connecting member can be adjusted when the adjusting mechanism is telescopic.

[0015] In one embodiment, two ends of the first connecting member and the second connecting member are hinged to the supporting portion respectively.

[0016] In one embodiment, the installation part is a mounting surface, a pin pulling rod is provided on the pin shaft, the first connecting member, the second connecting member and the adjustment mechanism are all obliquely arranged, the support part corresponding to the first connecting member is fixedly connected to the mounting surface, and the support part corresponding to the second connecting member is fixedly connected to the inner end surface of the pin pulling rod away from the mounting surface.

[0017] The device for assisting in pulling out and releasing a pin shaft provided by the utility model can change the distance between the first connecting member and the second connecting member by adjusting the adjusting mechanism, thereby changing the overall length of the device for assisting in pulling out and releasing a pin shaft. Under the supporting force of the supporting part, the moving speed of the pin shaft is slowed down, and the utility model can be applied to operations in a narrow space where the pin shaft needs to overcome a large elastic deformation to cause a change in the stroke of the pin shaft along the length direction, and avoids the risk of damage to the pin shaft and a safety accident caused by excessive rebound of the spring sleeved on the outer side of the pin shaft during the process of pulling out or releasing the pin. The utility model has a simple and compact structure, requires a small working space, and can intuitively change the working length, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The diagram schematically shows the pin-pulling and fixing state in the prior art.

[0020] Figure 2 The release state in the prior art is schematically shown.

[0021] Figure 3 The overall installation structure of the device for assisting in pulling out and releasing a pin shaft according to an embodiment of the utility model is schematically shown.

[0022] Figure 4 Schematically shows Figure 3 The local enlarged structure.

[0023] Figure 5 The overall assembly structure of the telescopic mechanism in the embodiment of the utility model is schematically shown.

[0024] Figure 6 The partial structure of the telescopic mechanism in the embodiment of the utility model is schematically shown.

[0025] Figure 7 The overall structure of the rotary drive assembly in the embodiment of the utility model is schematically shown.

[0026] Figure 8 The adjustment principle of the telescopic mechanism in the embodiment of the utility model is schematically shown.

[0027] Figure 3 , Figure 4 and Figure 8 The arrows in the figure indicate the movement directions of the first threaded rod, the second threaded rod and the rotation drive assembly in the telescopic mechanism. DETAILED DESCRIPTION

[0028] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "disposed", "provided with", "installed", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The orientation or position relationship indicated by the terms "upper", "inner end face", "outer side", etc. is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the utility model.

[0031] The terms "first", "second", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0032] The term "comprise", "comprising", or any other variation thereof, is intended to cover a non-exclusive inclusion of elements other than those listed and may also include other elements not expressly listed.

[0033] like Figure 3 and Figure 4 As shown, the device for assisting the pulling and releasing of a pin shaft according to an embodiment of the utility model comprises a first connecting member 11, a second connecting member 12, a supporting portion 13 and an adjusting mechanism 14; wherein, one end of the first connecting member 11 and the second connecting member 12 are respectively connected to a group of supporting portions 13, the supporting portion 13 corresponding to the first connecting member 11 is used to fix the mounting portion 101 where the connecting pin shaft 10 is located, and the supporting portion 13 corresponding to the second connecting member 12 is used to fix the end of the connecting pin shaft 10 away from the mounting portion 101, and the adjusting mechanism 14 is respectively connected to the first connecting member 11 and the second connecting member 12 to adjust the distance between the first connecting member 11 and the second connecting member 12 and slow down the moving speed of the pin shaft 10.

[0034] According to the device for assisting in pulling out and releasing a pin in the embodiment of the utility model, the distance between the first connecting member 11 and the second connecting member 12 can be changed by adjusting the adjusting mechanism 14, thereby changing the overall length of the device for assisting in pulling out and releasing a pin. Under the supporting force of the supporting portion 13, the moving speed of the pin 10 is slowed down, and it can be suitable for operations in a narrow space where the pin 10 needs to overcome a large elastic deformation to cause a change in the stroke of the pin 10 along the length direction, thereby avoiding excessive rebound of the spring 102 mounted on the outside of the pin 10 during the pulling out or releasing process, thereby damaging the pin 10 and causing the risk of safety accidents. For example, the slow pulling out and releasing of the pin 10, when the pin 10 overcomes the elastic deformation and moves into place, the adjusting action of the adjusting mechanism 14 can be stopped. The overall length of the device for assisting in pulling out and releasing a pin is simple and compact in structure, requires a small working space, and is intuitive to change in working length, which is safe and reliable.

[0035] like Figure 3 and Figure 4 As shown, specifically, in this embodiment, the mounting part 101 is a mounting surface, a pin pulling rod 103 is provided on the pin shaft 10, the first connecting member 11, the second connecting member 12 and the adjusting mechanism 14 are all arranged obliquely, the supporting portion 13 corresponding to the first connecting member 11 is fixedly connected to the mounting surface, and the supporting portion 13 corresponding to the second connecting member 12 is fixedly connected to the inner end surface of the pin pulling rod 103 away from the mounting surface. Through the oblique support adjustment of the first connecting member 11, the second connecting member 12 and the adjusting mechanism 14, the device for assisting the pulling and releasing of the pin shaft can stably and reliably adjust and lock the length, thereby playing a good role in protecting the pin shaft 10 during the pulling and releasing of the pin.

[0036] like Figure 5 and Figure 6As shown, specifically, in this embodiment, the ends of the first connecting member 11 and the second connecting member 12 are respectively hinged to the support portion 13. By hingedly connecting the ends of the first connecting member 11 and the second connecting member 12 to the support portion 13 through the ear seat and the rotation shaft, the first connecting member 11 and the second connecting member 12 can be rotated with the support portion 13 respectively, so as to facilitate the adjustment of the installation angle of the device for assisting the pulling and releasing of the pin shaft, thereby greatly improving the applicability of the device for assisting the pulling and releasing of the pin shaft.

[0037] like Figure 5 and Figure 6 As shown, specifically, in this embodiment, the adjustment mechanism 14 includes a sleeve 141 and a rotation drive assembly 142, wherein the first connecting member 11 and the second connecting member 12 are respectively provided with external threads of opposite rotation, the sleeve 141 is sleeved on the first connecting member 11 and the second connecting member 12, and the sleeve 113 is provided with internal threads of opposite rotation that are respectively engaged with the external threads, and the output end of the rotation drive assembly 142 is fixedly connected to the outer side of the sleeve 141 to drive the sleeve 141 to rotate and adjust the distance between the first connecting member 11 and the second connecting member 12. Specifically, the first connecting member 11 and the second connecting member 12 are respectively connected through the support part 13, and the sleeve 141 with an internal thread is rotated to change the distance between the first connecting member 11 and the second connecting member 12, thereby changing the overall length of the device for assisting the pin pulling and releasing. After the rotating sleeve 141 stops, the device for assisting the pin pulling and releasing can lock the length by itself. The rotation drive component 142 is fixed to the outside of the sleeve 141, and the rotation drive force is transmitted to the sleeve 141 to realize the rotation of the sleeve 141, thereby changing and locking the length of the device for assisting the pin pulling and releasing. The required working space is small, the working length change is intuitive, and it is safe and reliable.

[0038] like Figure 7As shown, specifically, in this embodiment, the rotation drive assembly 142 includes a shell 1421, a worm 1422, a transmission member 1423, a gear 1424 and a worm fixing portion 1425, wherein the worm fixing portion 1425 is fixedly connected to the shell 1421, the transmission member 1423 passes through the shell 1421 and the worm 1422 in sequence and is fixedly connected to the worm 1422, the transmission member 1423 is rotatably connected to the worm fixing portion 1425 and the shell 1421, the gear 1424 is disposed in the shell 1421 and meshes with the worm 1422, the gear 1424 is fixedly sleeved on the sleeve 141, the sleeve 141 passes through the shell 1421 and is rotatably connected to the shell 1421. Specifically, the rotation drive assembly is provided with a reduction structure composed of a worm 1422 and a gear 1424. By reasonably setting the reduction ratio, a small torque rotation drive sleeve 141 can be achieved to rotate, which greatly ensures that the working process of the entire device for assisting the pulling and releasing of the pin shaft is stable and reliable. Specifically, in this embodiment, the housing 1421 can be a split structure, including a first housing and a second housing that are detachably connected to each other, so that the installation and maintenance of the entire rotation drive assembly 142 are convenient.

[0039] like Figure 7 As shown, specifically, in this embodiment, a reaction force arm is also provided on the housing 1421, and the reaction force arm at the installation position 15 on the housing 1421 and the installation position of the sleeve 141 are both located on the width center line O1 of the housing 1421. Specifically, by installing the reaction force arm through the hexagonal or other polygonal reaction force arm installation hole 1426 provided at the installation position 15 on the housing 1421, the housing 1421 can be prevented from rotating, thereby avoiding affecting the adjustment process of the telescopic mechanism. Specifically, in this embodiment, a positioning structure 1427 is provided at the driving end of the transmission member 1423, and the positioning structure 1427 is used to engage with the output end of the rotating drive member. Specifically, by providing a positioning structure 1427 at the driving end of the transmission member 1423 for engaging with the output end of the rotating drive member, it is convenient to operate by manual twisting or using a small-power rotating drive member such as an electric screwdriver, and energy consumption is low.

[0040] like Figure 7 As shown, specifically, in this embodiment, the sleeve 141 is a polygonal square rod structure, and a polygonal mounting hole matching the polygonal square rod structure is provided at the center of the gear 1424. Specifically, by matching and installing a polygonal square rod structure such as a quadrilateral or hexagonal shape and a polygonal mounting hole, the rotation drive assembly 142 can stably and reliably drive the sleeve 141 to rotate to achieve the length adjustment of the device for assisting the pulling and releasing of the pin shaft.

[0041] like Figure 8 As shown, the working principle of the device for assisting the pulling and releasing of the pin implemented by the utility model is as follows:

[0042] By driving the transmission member 1423 to rotate the rotating worm 1422, the gear 1424 drives the sleeve 141 to rotate. Since the first connecting member 11 and the second connecting member 12 are respectively connected to the support part 13 at both ends, the rotation of the sleeve 141 will cause the distance between the first connecting member 11 and the second connecting member 12 to change, thereby changing the total length of the device for assisting the pin extraction and release. When the total length of the device for assisting the pin extraction and release meets the pin extraction position of the pin shaft 10, the driving force of the driving end of the transmission member 1423 is withdrawn and the device for assisting the pin extraction and release locks its length by itself.

[0043] It is easy to understand that in an embodiment not shown, the rotation drive assembly 142 can be a torque multiplier, the output end of the torque multiplier is fixedly sleeved on the sleeve 141, and the input end of the torque multiplier is used to apply the driving force. Similarly, the rotation drive assembly 142 is set as a torque multiplier, which can also realize the rotation of the rotation drive sleeve 141, thereby ensuring that the working process of the entire device for assisting the pulling and releasing of the pin shaft is stable and reliable to a great extent.

[0044] It is easy to understand that in an embodiment not shown, the adjustment mechanism 14 is any one of a telescopic oil cylinder, a telescopic air cylinder and an electric telescopic cylinder, the cylinder barrel of the adjustment mechanism 14 is fixedly connected to the first connecting member 11, and the cylinder rod of the adjustment mechanism 14 is fixedly connected to the second connecting member 12, so that the adjustment mechanism 14 adjusts the distance between the first connecting member 11 and the second connecting member 12 when it is extended or retracted. Obviously, the adjustment mechanism 14 of the above structural form can also change and lock the length of the entire device for assisting the pulling and releasing of the pin shaft, the required working space is small, the working length change is intuitive, safe and reliable.

[0045] According to the above embodiments, it can be seen that the device for assisting in pulling out and releasing a pin shaft of the utility model has a simple and compact structure, requires a small working space, and can change the working length intuitively, and is safe and reliable.

[0046] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A device for assisting the pulling and releasing of a pin, characterized in that: It comprises a first connecting member (11), a second connecting member (12), a supporting portion (13) and an adjusting mechanism (14); wherein: One end of each of the first connecting member (11) and the second connecting member (12) is connected to a group of the supporting parts (13); the supporting part (13) corresponding to the first connecting member (11) is used to fix the connecting pin (10) at the installation part (101), and the supporting part (13) corresponding to the second connecting member (12) is used to fix the connecting pin (10) at an end away from the installation part (101); The adjustment mechanism (14) is respectively connected to the first connecting member (11) and the second connecting member (12) to adjust the distance between the first connecting member (11) and the second connecting member (12) and to slow down the moving speed of the pin shaft (10).

2. The device for assisting the pulling and releasing of a pin according to claim 1, characterized in that: The adjustment mechanism (14) comprises a sleeve (141) and a rotation drive assembly (142); wherein: The first connecting member (11) and the second connecting member (12) are respectively provided with external threads of opposite rotation directions, the sleeve (141) is sleeved on the first connecting member (11) and the second connecting member (12), and the sleeve (141) is provided with internal threads of opposite rotation directions respectively meshing with the external threads; The output end of the rotation drive assembly (142) is fixedly connected to the outer side of the sleeve (141) to drive the sleeve (141) to rotate and adjust the distance between the first connecting member (11) and the second connecting member (12).

3. The device for assisting the pulling and releasing of a pin according to claim 2, characterized in that: The rotation drive assembly (142) comprises a housing (1421), a worm (1422), a transmission member (1423), a gear (1424) and a worm fixing portion (1425); wherein, The worm fixing portion (1425) is fixedly connected to the housing (1421); the transmission member (1423) passes through the housing (1421) and the worm (1422) in sequence and is fixedly connected to the worm (1422); the transmission member (1423) is rotatably connected to the worm fixing portion (1425) and the housing (1421); The gear (1424) is disposed in the housing (1421) and meshes with the worm (1422); the gear (1424) is fixedly sleeved on the sleeve (141); the sleeve (141) is penetrated through the housing (1421) and is rotatably connected to the housing (1421).

4. The device for assisting the pulling and releasing of a pin according to claim 3, characterized in that: The housing (1421) is also provided with a reaction force arm, wherein the installation position (15) of the reaction force arm on the housing (1421) and the installation position of the sleeve (141) are both located on the width center line (O1) of the housing (1421), and the reaction force arm is located on a side of the housing (1421) away from the gear (1424).

5. The device for assisting the pulling and releasing of a pin according to claim 3 or 4, characterized in that: The driving end of the transmission member (1423) is provided with a positioning structure (1427), and the positioning structure (1427) is used to be engaged with the output end of the rotating driving member.

6. The device for assisting the pulling and releasing of a pin according to claim 4, characterized in that: The sleeve (141) is a polygonal square rod structure, and a polygonal mounting hole matching the polygonal square rod structure is provided at the center of the gear (1424).

7. The device for assisting the pulling and releasing of a pin according to claim 2, characterized in that: The rotation driving component (142) is a torque multiplier, and the output end of the torque multiplier is fixedly sleeved on the sleeve (141).

8. The device for assisting the pulling and releasing of a pin according to claim 1, characterized in that: The adjusting mechanism (14) is any one of a telescopic oil cylinder, a telescopic air cylinder and an electric cylinder; the cylinder barrel of the adjusting mechanism is fixedly connected to the first connecting member (11); the cylinder rod of the adjusting mechanism (14) is fixedly connected to the second connecting member (12), so that the distance between the first connecting member (11) and the second connecting member (12) can be adjusted when the adjusting mechanism (14) is telescopic.

9. The device for assisting in pulling out and releasing a pin according to any one of claims 1 to 4, characterized in that: The ends of the first connecting member (11) and the second connecting member (12) are respectively hinged to the supporting portion (13).

10. The device for assisting in pulling out and releasing a pin according to any one of claims 1 to 4, characterized in that: The mounting portion (101) is a mounting surface, a pin pulling rod (103) is provided on the pin shaft (10), the first connecting member (11), the second connecting member (12) and the adjusting mechanism (14) are all arranged obliquely, the supporting portion (13) corresponding to the first connecting member (11) is fixedly connected to the mounting surface, and the supporting portion (13) corresponding to the second connecting member (12) is fixedly connected to an inner end surface of the pin pulling rod (103) away from the mounting surface.

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