CN217434257U

CN217434257U - Bolt tightening device

Info

Publication number: CN217434257U
Application number: CN202221342773.4U
Authority: CN
Inventors: 马清海; 张海军; 张福义; 孟东升; 李青山
Original assignee: Smc Tianjin Manufacturing Co ltd; Smc China Co ltd; SMC Beijing Manufacturing Co Ltd; SMC Corp
Current assignee: Smc Tianjin Manufacturing Co ltd; Smc China Co ltd; SMC Beijing Manufacturing Co Ltd; SMC Corp
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-16
Anticipated expiration: 2032-05-31

Abstract

The utility model discloses a bolt tightening device belongs to the assembly quality field. The method comprises the following steps: the driving part comprises a driving motor and a swing cylinder, and the output end of the swing cylinder is a first gear; the transmission part comprises a second gear, a one-way bearing and a transmission rod, the transmission rod is connected with an output shaft of the driving motor through a coupler, the second gear is meshed with the first gear, and the second gear is sleeved on the transmission rod through the one-way bearing; and the tightening part is fixedly connected to the end part, far away from the second gear, of the transmission rod, and is in anti-rotation fit with a fastening bolt on a part to be tightened. The utility model discloses simple structure screws up the moment of torsion and adjusts easily.

Description

Bolt tightening device

Technical Field

The utility model relates to a cylinder assembly field, in particular to a bolt tightening device that is used for cylinder end cover and cylinder body to be connected.

Background

The cylinder is generally composed of a cylinder tube, an end cap, a piston rod, a seal, etc., for converting a gas pressure into a mechanical force. The air cylinder is simple in principle, easy to install and maintain, capable of normally working in high-temperature and low-temperature environments and capable of preventing dust and water, and therefore widely applied to the field of automatic production.

The air tightness of the cylinder is a key factor for ensuring the effective action of the cylinder, and therefore, the air tightness is a key factor for measuring the machining, manufacturing and assembling of the cylinder. Wherein, in order to guarantee the gas tightness of cylinder, need cooperate closely between the end cover of cylinder and the cylinder body. Usually, the tie rod type cylinder is tightened by a tie rod nut, and if tightened directly, the two mating surfaces may produce a moment due to angular problems of placement, for example, when the two surfaces are not in full contact in practice. Therefore, the tie rod cylinder is usually assembled by pre-tightening, then loosening and then re-tightening to ensure a face-to-face tight fit. The existing large-torque tightening mode is realized by a servo motor or a pneumatic motor and the like, but the servo motor has higher cost, the pneumatic motor has higher mode noise, the instantaneous displacement is higher, and the torque change is not easy to adjust. Based on this, the present application is proposed.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a bolt tightening device that structure is simple relatively, control cost is lower.

To the technical problem mentioned above, the utility model provides a following technical scheme:

a bolt tightening device comprising: the driving part comprises a driving motor and a swing cylinder, and the output end of the swing cylinder is a first gear; the transmission part comprises a second gear, a one-way bearing and a transmission rod, the transmission rod is connected with an output shaft of the driving motor through a coupler, the second gear is meshed with the first gear, and the second gear is sleeved on the transmission rod through the one-way bearing; and the tightening part is fixedly connected to the end part, far away from the second gear, of the transmission rod, and is in anti-rotation fit with a fastening bolt on a part to be tightened.

The utility model discloses an among the partial embodiment, still including control the solenoid valve of swing cylinder air inlet direction, be used for detecting the magnetic switch and the control unit of swing cylinder's piston position, the control unit is according to magnetic switch's detection signal control solenoid valve action.

The utility model discloses an among the some embodiments, the transfer line include first transfer line and second transfer line first transfer line with the second transfer line passes through a universal joint and connects, the second gear connect in on the first transfer line, screw up the portion with the second transfer line passes through second universal joint and connects.

The utility model discloses an among the some embodiments, still include the supporting part, the supporting part includes the supporting seat and installs the first backup pad on the supporting seat, the drive division install in on the first backup pad.

In some embodiments of the present invention, the supporting portion further includes a second supporting plate installed on the supporting seat, and the first transmission rod is rotatably connected to the second supporting plate.

The utility model discloses an in some embodiments, the supporting part still including install in third backup pad on the supporting seat, screw up the portion rotationally connect in the third backup pad.

The utility model discloses an in some embodiments, the supporting part still includes the support column, the support column connect respectively in first backup pad the second backup pad and in the third backup pad.

The utility model discloses an among the partial implementation mode, still include lift portion, lift portion is used for driving drive portion, transmission portion and screw up the portion to keeping away from or being close treat that it removes to screw up a direction.

The utility model discloses an among the some embodiments, lift portion includes the lift cylinder, the output of lift cylinder acts on in the first backup pad, second backup pad or the third backup pad of supporting part.

The utility model discloses an among the partial implementation, still include the direction brace table, be equipped with sliding guide on the direction brace table, supporting part sliding connection in sliding guide is last.

The technical scheme of the utility model prior art relatively has following technological effect:

the utility model provides an among the bolt tightening device, drive division includes driving motor and swing cylinder, wherein, drives through driving motor the transfer line and tighten up the portion and rotate several rings and accomplish screwing up in advance of bolt, rethread swing cylinder drive transfer line and tighten up the portion and continue to rotate, because set up one-way bearing on the transfer line, its reciprocating motion that can make swing cylinder converts the one-way rotation of transfer line into, has realized the final tightening of this bolt, and it is better to make the bolt tightening effect through screwing up in advance and the final cooperation of screwing up. Meanwhile, the final tightening force of the bolt can be controlled by controlling the output pressure of the swing cylinder, and the control is simple and reliable, and the cost is lower.

Drawings

The objects and advantages of the present invention will be understood from the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of an embodiment of the bolt tightening apparatus according to the present invention;

fig. 2 is another schematic structural view of an embodiment of the bolt tightening apparatus according to the present invention;

fig. 3 is another schematic structural diagram of an embodiment of the bolt tightening apparatus according to the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 to 3 show a bolt tightening device according to an embodiment of the present invention, which is used as an assembling device for bolt-fastening a part to be fastened, for example, a cylinder head and a cylinder body of a cylinder. The bolt tightening device includes a driving portion 10 for outputting power, a tightening portion 30 for anti-rotation fitting with a fastening screw on a member a to be tightened (e.g., a cylinder block and an end cover) and effecting screw tightening, and a transmission portion 20 for transmitting the power of the driving portion 10 to the tightening portion 30. The driving part 10 comprises a driving motor 11 and a swing cylinder 12, wherein the output end of the swing cylinder 12 is a first gear 12 a; the transmission portion 20 includes second gear 21, one-way bearing 22 and transfer line 23, driving motor 11's output shaft with transfer line 23 passes through the coupling joint, second gear 21 passes through one-way bearing 22 cover and locates on the transfer line 23, second gear 21 with first gear 12a meshing connection, screw up portion 30 fixed connection in transfer line 23 is kept away from the tip of second gear 21, and one-way bearing 22 makes along the power of first direction pass through one-way bearing 22 transmission extremely on the transfer line 23, makes transfer line 23 keep motionless along the power of second direction.

With the above bolt tightening apparatus, since the driving part 10 includes the driving motor 11 and the swing cylinder 12, the two driving devices can achieve pre-tightening and final tightening of the bolt. The driving motor 11 drives the transmission rod 23 and the tightening part 30 to rotate for several circles to complete the pre-tightening of the bolt, the swing cylinder 12 drives the transmission rod 23 and the tightening part 30 to continue rotating, and the transmission rod 23 is provided with the one-way bearing 22 which can convert the reciprocating motion of the swing cylinder 12 into the one-way rotation of the transmission rod 23, so that the final tightening of the bolt is realized. The final tightening force to which the bolt is subjected is controlled by controlling the output pressure of the swing cylinder 12.

Specifically, in one embodiment, the bolt tightening device includes a solenoid valve for controlling the air intake direction of the swing cylinder 12, a magnetic switch 40 for detecting the position of the piston of the swing cylinder 12, and a control unit, specifically, the control unit is a PLC controller, and the PLC controller controls the solenoid valve to operate according to a detection signal of the magnetic switch 40.

Specifically, magnetic switches 40 are respectively arranged on two sides of the swing cylinder 12, when a first port of the swing cylinder 12 admits air, a piston in the cylinder moves in a first direction, the first gear 12a rotates in the first direction, the first gear 12a is meshed with the second gear 21 and drives the transmission rod 23 to rotate under the action of the one-way bearing 22, and further the tightening part 30 is driven to rotate, so that tightening of a fastening nut is realized; after the piston moves to the position of the first magnetic switch 40, the first magnetic switch 40 generates a first electric signal, the control unit controls the electromagnetic valve to act according to the first electric signal, so that the second port of the swing cylinder 12 is inflated, the piston in the swing cylinder 12 moves along the second direction, the first gear 12a rotates along the second direction, the rotation of the second gear 21 cannot be transmitted to the transmission rod 23 under the action of the one-way bearing 22, the tightening part 30 is prevented from rotating reversely, after the piston moves to the position of the second magnetic switch 40, the second magnetic switch 40 generates a second electric signal, the control unit controls the electromagnetic valve to act according to the second electric signal, so that the first port of the swing cylinder 12 is inflated, and the screw is tightened in a circulating reciprocating manner; when the first magnetic switch 40 and the second magnetic switch 40 do not generate the electric signal within the set time, and the bolt is subjected to a torque enough to prevent the tightening part 30 from continuing to rotate, the bolt is considered to reach the set tightening force, and the bolt tightening device completes the work.

Specifically, the transmission rod 23 includes a first transmission rod 23a and a second transmission rod 23b, the first transmission rod 23a and the second transmission rod 23b are connected by a first universal coupling 24, the second gear 21 is connected to the first transmission rod 23a, and the tightening portion 30 is connected to the second transmission rod 23b by a second universal coupling 25. Two universal couplings are provided to transmit the driving force of the driving part 10 to the tightening part 30, so that the positions of different driving parts 10 and the member a to be tightened are matched.

Specifically, the tightening part 30 is formed in a rod shape, and one side end of the tightening part is formed in a hexagonal shape so as to be matched with the hexagon socket head cap screw, and in other alternative embodiments, the end of the tightening part 30 is formed in a regular hexagonal sleeve shape to be matched with the hexagon socket head cap screw.

Generally, a cylinder end cover is tightly connected with a cylinder body through four fastening bolts; therefore, in order to improve the assembling efficiency, the bolt tightening device according to the present embodiment is provided with four sets of the driving portion 10, the power transmission portion 20, and the tightening portion 30. Of course, in other embodiments, the driving portion 10, the transmission portion 20 and the tightening portion 30 of the bolt tightening device may be provided in a group or matched with the number of bolts on the member a to be tightened.

Specifically, the bolt tightening apparatus further includes a support portion 50, the support portion 50 including a support base 54 and a first support plate 51 mounted on the support base 54, the driving portion 10 being mounted on the first support plate 51.

Further, in order to improve the transmission stability of the transmission part 20, in one embodiment, the supporting part 50 further includes a second supporting plate 52 mounted on the supporting seat 54, and the first transmission rod 23a is rotatably connected to the second supporting plate 52; more specifically, the second support plate 52 is provided with a coupling hole, and the first transmission rod 23a is coupled to the coupling hole of the second support plate 52 through a bearing.

Further, in one embodiment, the supporting portion 50 further includes a third supporting plate 53 mounted on the supporting seat 54, and the tightening portion 30 is rotatably connected to the third supporting plate 53. More specifically, the third support plate 53 is provided with a coupling hole, and one end of the tightening part 30 near the driving lever 23 is coupled to the coupling hole of the third support plate 53 through a bearing.

Further, the supporting portion 50 further includes a supporting column 55, and the supporting column 55 is respectively connected to the first supporting plate 51, the second supporting plate 52 and the third supporting plate 53, so that the first supporting plate 51, the second supporting plate 52 and the third supporting plate 53 can support the driving portion 10, the transmission portion 20 and the tightening portion 30 more stably.

The bolt tightening device of a specific embodiment of this application still includes lift portion 60, lift portion 60 is used for driving drive portion 10, transmission portion 20 and the portion 30 of screwing up move to keeping away from or being close to the piece direction of waiting to screw up. Specifically, when the bolt of the member to be screwed is screwed, firstly, the member to be screwed is placed at one end, for example, the lower side of the bolt screwing device, and then the lifting part 60 drives the driving part 10, the transmission part 20 and the screwing part 30 to move downwards, until the screwing part 30 is in anti-rotation fit with the fastening bolt, the driving part 10 is controlled to move, and the bolt screwing action is realized; after the bolt is tightened, the lifting unit 60 controls the driving unit 10, the transmission unit 20 and the tightening unit 30 to move upward until the tightening unit 30 is disengaged from the fastening bolt.

In one embodiment, the lifting unit 60 includes a lifting cylinder, and an output end of the lifting cylinder acts on the first support plate 51, the second support plate 52, or the third support plate 53 of the support 50. As shown in fig. 2, the piston rod of the lifting cylinder is connected to the third support plate 53 located at the lowest side, and since the first support plate 51, the second support plate 52 and the third support plate 53 are connected through the support column 55, they simultaneously drive the support 50 to move, and further drive the driving part 10, the transmission part 20 and the tightening part 30 to move.

In one specific embodiment, the bolt tightening device further includes a guide support 70, a sliding rail 71 is disposed on the guide support 70, and the support 50 is slidably connected to the sliding rail 71. By slidably coupling the support portion 50 to the guide support table 70, the lifting portion 60 is stable and reliable when driving the support portion 50 to move, and is not likely to shake.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A bolt tightening apparatus, comprising:

the driving part comprises a driving motor and a swing cylinder, and the output end of the swing cylinder is a first gear;

the transmission part comprises a second gear, a one-way bearing and a transmission rod, the transmission rod is connected with an output shaft of the driving motor through a coupler, the second gear is meshed with the first gear, and the second gear is sleeved on the transmission rod through the one-way bearing;

and the tightening part is fixedly connected to the end part, far away from the second gear, of the transmission rod, and is in anti-rotation fit with a fastening bolt on a part to be tightened.

2. The bolt tightening apparatus according to claim 1, further comprising a solenoid valve that controls an intake direction of the swing cylinder, a magnetic switch that detects a position of a piston of the swing cylinder, and a control unit that controls an operation of the solenoid valve in accordance with a detection signal of the magnetic switch.

3. The bolt tightening apparatus according to claim 1 or 2, wherein the transmission rod includes a first transmission rod and a second transmission rod, the first transmission rod and the second transmission rod are connected by a first universal coupling, the second gear is connected to the first transmission rod, and the tightening portion and the second transmission rod are connected by a second universal coupling.

4. A bolt tightening apparatus according to claim 3, further comprising a support portion including a support base and a first support plate mounted on the support base, the drive portion being mounted on the first support plate.

5. The bolt tightening apparatus according to claim 4, wherein the support portion further includes a second support plate mounted to the support base, and the first transmission lever is rotatably coupled to the second support plate.

6. The bolt tightening apparatus according to claim 5, wherein the support portion further includes a third support plate mounted on the support base, and the tightening portion is rotatably connected to the third support plate.

7. The bolt tightening apparatus according to claim 6, wherein the support portion further comprises support posts connected to the first support plate, the second support plate, and the third support plate, respectively.

8. The bolt tightening device according to claim 4, further comprising a lifting portion for moving the driving portion, the transmission portion, and the tightening portion in a direction away from or toward the member to be tightened.

9. A bolt tightening apparatus according to claim 8, wherein the lifting portion comprises a lifting cylinder, and the output end of the lifting cylinder acts on the first support plate, the second support plate or the third support plate of the support portion.

10. A bolt tightening device according to claim 4, further comprising a guide support platform on which is provided a sliding guide track, the support portion being slidably connected to the sliding guide track.