A piston mechanism and a clamping device

Abstract

The present application relates to a piston mechanism and a clamping device, wherein the piston mechanism comprises a housing, a plurality of drive components and a guide member, wherein a plurality of moving cavities are defined in the housing, wherein the housing has a first end and a second end, wherein the drive components are movably arranged in the moving cavities, wherein each drive component has a slider, wherein the slider is guided and matched with the guide member, and at least two of the sliders are suitable for opposite or reverse movement, wherein the first end of the housing is provided with a first connecting hole and a second connecting hole, wherein each connecting hole is connected to an end portion of at least one moving cavity close to the first end and to an end portion of at least one moving cavity close to the second end. Thus, by allowing the pressure medium to flow from the first connecting hole or the second connecting hole to the first end and the second end of the housing at the same time, the pressure medium can drive the plurality of drive components to move synchronously in opposite or reverse directions, thereby reducing the number of medium providing components required when the piston mechanism is working, and also improving the movement synchronization of the plurality of sliders in the piston mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of object transportation, and in particular to a piston mechanism and a clamping device having the piston mechanism. Background Art

[0002] The split piston mechanism has multiple driving components that can move in opposite and reverse directions. By driving the driving components, the corresponding sliders are driven to move. The structures such as the clamping claws installed on the multiple sliders can move in opposite or reverse directions to achieve functions such as clamping objects.

[0003] In the related art, in order to drive multiple driving components to move in opposite or reverse directions, the pressure medium in the split piston mechanism needs to be filled into the moving cavity from the first end and the second end of the shell respectively. The existing piston mechanism needs to be connected with multiple medium providers during use, some of which are used to provide pressure medium to the first end of the shell, and other medium providers are used to provide pressure medium to the second end of the shell. This will result in an excessive number of medium providers required to drive the normal operation of the piston mechanism, and multiple medium providers are difficult to work synchronously, resulting in poor movement synchronization of multiple sliders of the piston mechanism. Summary of the invention

[0004] The purpose of the present application is to provide a piston mechanism, wherein the number of medium providing parts required for the piston mechanism of the present application to work is smaller and the movement synchronization of multiple sliders in the piston mechanism is higher.

[0005] The present application further proposes a clamping device.

[0006] In the first aspect, the present application provides a piston mechanism adopting the following technical solution:

[0007] A piston mechanism comprises: a shell, a plurality of movement chambers are defined in the shell, the movement chambers extend along a first direction of the shell, and the shell has a first end and a second end along the first direction; a plurality of drive assemblies, the drive assemblies are movably arranged in the movement chambers, a pressure medium is suitable for being injected into the movement chambers from the first end to drive the drive assemblies to move from the first end toward the second end, and the pressure medium is suitable for being injected into the movement chambers from the second end to drive the drive assemblies to move from the second end toward the first end; a guide member, each of the drive assemblies has a slider, the sliders of the plurality of drive assemblies are all guided and matched with the guide member, and at least two of the sliders are suitable for opposite or reverse movement; wherein the first end of the shell is provided with a first communicating hole and a second communicating hole, the first communicating hole is communicated with an end portion of at least one of the movement chambers close to the first end and is communicated with an end portion of at least one of the movement chambers close to the second end, the second communicating hole is communicated with an end portion of at least one of the movement chambers close to the first end and is communicated with an end portion of at least one of the movement chambers close to the second end, and the first communicating hole and the second communicating hole are mutually blocked.

[0008] By adopting the above technical solution, when the pressure medium is injected into the first connecting hole, at least two driving components are suitable for opposite movement, and when the pressure medium is injected into the second connecting hole, at least two driving components are suitable for reverse movement, so that at least two driving components are suitable for opposite or reverse movement. The pressure medium can drive multiple driving components to move synchronously in the opposite or reverse direction through the first connecting hole or the second connecting hole. Compared with the prior art, the number of medium providers required for the operation of the piston mechanism can be reduced, and the movement synchronization of multiple sliders in the piston mechanism can be improved.

[0009] Optionally, the shell also defines a first connecting flow channel and a second connecting flow channel, the first connecting flow channel extends between the first end and the second end, and the first connecting flow channel connects the first connecting hole and the corresponding end of the moving cavity near the second end; the second connecting flow channel extends between the first end and the second end, and the second connecting flow channel connects the second connecting hole and the corresponding end of the moving cavity near the second end.

[0010] By adopting the above technical solution, the pressure medium can flow between the first connecting hole and the second end of the shell through the first connecting channel, and the pressure medium can flow between the second connecting hole and the second end of the shell through the second connecting channel. The pressure medium can flow into or out of the motion cavity from the second end of the shell to promote the at least two driving components to move in opposite or reverse directions.

[0011] Optionally, the shell includes a cylinder, a first end cover and a second end cover, the cylinder defines the movement cavity, along the first direction, the first end cover is connected to one end of the cylinder and the second end cover is connected to the other end of the cylinder, the first end cover is provided with the first connecting hole and the second connecting hole, the first end cover, the second end cover and the cylinder jointly define the first connecting flow channel and the second connecting flow channel, the second end cover has a first connecting port connecting the movement cavity and the first connecting flow channel, and the second end cover has a second connecting port connecting the movement cavity and the second connecting flow channel.

[0012] By adopting the above technical solution, by dividing the shell into three parts including the cylinder, the first end cover and the second end cover, the production personnel can process the cylinder, the first end cover and the second end cover separately, so that the cylinder, the first end cover and the second end cover can be processed to form partial structures of the first connecting flow channel and the second connecting flow channel respectively, and then the cylinder, the first end cover and the second end cover are assembled into a complete shell, so that the shell defines the first connecting flow channel and the second connecting flow channel, thereby reducing the processing difficulty of the shell.

[0013] Optionally, the first end cover and / or the second end cover is provided with a limit assembly, the limit assembly includes an adjusting bolt and a nut, the adjusting bolt passes through the end cover and is suitable for abutting against the driving assembly, the movement stroke of the driving assembly is adjusted by adjusting the length of the adjusting bolt extending into the movement cavity, and the nut is sleeved on the outside of the adjusting bolt and is suitable for fixing the adjusting bolt to the end cover.

[0014] By adopting the above technical solution, the movement stroke of the driving component can be adjusted by adjusting the length of the adjusting bolt extending into the moving cavity, so the driving component can be accurately limited, thereby improving the movement accuracy of the piston mechanism.

[0015] Optionally, the driving assembly is further provided with a moving member and a connecting member, wherein the moving member is slidably disposed in the moving cavity, the moving member is suitable for moving after being driven by the pressure medium, and the connecting member is connected between the slider and the moving member.

[0016] By adopting the above technical solution, the movable part is driven by the pressure medium to drive the connecting part and the slider to move synchronously. The movable part and the slider are connected by a mechanical contact method, which is stable and reliable. Compared with the magnetic rodless cylinder, the piston mechanism of this solution can carry a larger load.

[0017] Optionally, the moving part divides the moving cavity into a first sub-cavity, a second sub-cavity and a third sub-cavity, the first sub-cavity is arranged close to the first end, the second sub-cavity is arranged close to the second end, the third sub-cavity is located between the first sub-cavity and the second sub-cavity, the first sub-cavity and the third cavity are sealed, and the second sub-cavity and the third sub-cavity are sealed, and the moving part moves in the moving cavity to adjust the volumes of the first sub-cavity and the second sub-cavity.

[0018] By adopting the above technical solution, the pressure medium can be filled into the first sub-cavity and the second sub-cavity to adjust the volume of the first sub-cavity and the second sub-cavity, and the driving moving member drives the slider to move when the volume of the first sub-cavity and the second sub-cavity changes. In addition, by sealing the gap between the first sub-cavity and the third sub-cavity, and between the second sub-cavity and the third sub-cavity, the pressure medium can be prevented from leaking from the first sub-cavity to the third sub-cavity, and / or from leaking from the second sub-cavity to the third sub-cavity, so as to avoid the lack of pressure in the first sub-cavity or the second sub-cavity causing the multiple driving components to fail to move synchronously.

[0019] Optionally, the shell is provided with an avoidance hole, the avoidance hole is communicated with the second sub-cavity, and the avoidance hole is used to avoid the connecting piece.

[0020] By adopting the above technical solution, the connecting member can reciprocate between the slider and the moving member along the first direction of the shell without hindrance.

[0021] Optionally, the piston mechanism also includes a synchronization component, each of the driving components includes a moving part, the moving part is arranged in the moving cavity and is suitable for driving the slider to move, the synchronization component is arranged between at least two adjacent moving parts, and the synchronization component is transmission-connected to the corresponding two moving parts so that the corresponding two moving parts move synchronously.

[0022] By adopting the above-mentioned technical scheme, the synchronization component can improve the synchronous movement effect between the two moving parts that are transmission-connected to the synchronization component. Since the moving part is arranged in the moving cavity and is suitable for driving the slider to move, the slider connected to the two moving parts also follows the moving parts to achieve synchronous movement, so that the piston mechanism of this scheme can be widely used in occasions of synchronous opening action.

[0023] Optionally, the synchronization component includes a base fixedly connected to the cylinder, a sleeve rod provided on the base and a gear sleeved on the sleeve rod, and a plurality of meshing teeth are provided on one side close to the gear of the two moving parts corresponding to the synchronization component, and the plurality of meshing teeth are arranged in sequence along the first direction, and the meshing teeth are meshingly connected with the gear.

[0024] By adopting the above technical solution, gears and meshing teeth are used on the moving parts to achieve synchronous movement of the two moving parts, which is low in cost and simple in processing; and the synchronous component does not require a motor drive, so it can be used in humid environments, has a wide range of applications, and has high operating stability.

[0025] In the second aspect, the present application provides a clamping device adopting the following technical solution:

[0026] A clamping device comprises the above-mentioned piston mechanism.

[0027] By adopting the above technical solution, the piston mechanism is arranged in the clamping device, and when the pressure medium is injected into the first connecting hole of the piston mechanism, at least two driving components of the piston mechanism are suitable for opposite movement, and when the pressure medium is injected into the second connecting hole of the piston mechanism, at least two driving components of the piston mechanism are suitable for reverse movement, so that at least two driving components are suitable for opposite or reverse movement, and the pressure medium can drive multiple driving components to move synchronously in the opposite or reverse direction through the first connecting hole or the second connecting hole. Compared with the prior art, the number of medium providers required when the piston mechanism is working can be reduced, and the movement synchronization of multiple sliders in the piston mechanism can be improved, so that the clamping device can stably and reliably clamp the object.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. When the pressure medium is injected into the first communicating hole, at least two driving components are adapted to move in opposite directions, and when the pressure medium is injected into the second communicating hole, at least two driving components are adapted to move in opposite directions, so that at least two driving components are adapted to move in opposite directions or in opposite directions, and the pressure medium can drive multiple driving components to move in opposite directions or in opposite directions synchronously through the first communicating hole or the second communicating hole. Compared with the prior art, the number of medium providing components required when the piston mechanism is working can be reduced, and the movement synchronization of multiple sliders in the piston mechanism can also be improved;

[0030] 2. The movement stroke of the driving component can be adjusted by adjusting the length of the adjusting bolt extending into the movement cavity, which can accurately limit the driving component and improve the movement accuracy of the piston mechanism;

[0031] 3. The synchronization component can improve the synchronous movement effect between the two moving parts that are transmission-connected to the synchronization component. Since the moving part is arranged in the moving cavity and is suitable for driving the slider to move, the slider connected to the two moving parts also follows the moving parts to achieve synchronous movement, so that the piston mechanism of this scheme can be widely used in occasions of synchronous opening action. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of a piston mechanism of an embodiment of the present application;

[0033] Figure 2 is a cross-sectional view of a housing according to an embodiment of the present application;

[0034] Figure 3 is a schematic diagram of the piston mechanism of the embodiment of the present application without the cylinder;

[0035] Figure 4 is a cross-sectional view of the piston mechanism of the embodiment of the present application from another angle;

[0036] Figure 5 is a cross-sectional view of a second end cover of an embodiment of the present application;

[0037] Figure 6 is a schematic diagram of the cooperation between the moving part and the synchronization component of the embodiment of the present application;

[0038] Figure 7 It is a cross-sectional view of the shell of the embodiment of the present application at another angle.

[0039] Description of reference numerals: 1, housing; 11, cylinder; 1111, first sub-cavity; 1112, second sub-cavity; 1113, third sub-cavity; 112, avoidance hole; 113, first movement cavity; 114, second movement cavity; 12, first end cover; 121, first communication hole; 122, second communication hole; 13, second end cover; 131, first communication port; 132, second communication port; 14, first communication flow channel; 15, second communication flow channel;

[0040] 2. Driving assembly; 21. Moving part; 211. Meshing teeth; 212. Wear-resistant ring; 22. Connecting part; 23. Sliding block;

[0041] 3. Guide parts;

[0042] 4. Limiting assembly; 41. Adjusting bolt; 42. Nut;

[0043] 5. Synchronous assembly; 51. Base; 52. Sleeve rod; 53. Gear. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1 -Attached Figure 7 , further details of this application are given.

[0045] The piston mechanism disclosed in this embodiment can be arranged in a clamping device, the clamping device is used to clamp an object, the clamping claws of the clamping device are suitable for being installed on the piston mechanism, and the piston mechanism is used to drive the clamping claws to open or close to clamp or release the object.

[0046] Reference Figure 1-Figure 7The piston mechanism includes a housing 1, a plurality of drive assemblies 2 and a guide member 3, wherein the number of drive assemblies 2 may be two or more, and the present application is described below with the number of drive assemblies 2 being two. The housing 1 defines two motion cavities, specifically, the housing 1 includes a cylinder 11, a first end cover 12 and a second end cover 13. The cylinder 11 defines two motion cavities, and the motion cavities extend along a first direction of the housing 1. It should be noted that the first direction of the housing 1 may refer to the length direction of the piston mechanism, and the length direction of the piston mechanism may be Figure 1 Along the first direction of the housing 1, the housing 1 has a first end (i.e. Figure 1 The front end of the piston mechanism) and the second end (i.e. Figure 1 The first end cover 12 is connected to one end of the cylinder 11 and the second end cover 13 is connected to the other end of the cylinder 11. Figure 1 In the illustrated embodiment, the first end cover 12 is connected to the front end of the cylinder barrel 11 and the second end cover 13 is connected to the rear end of the cylinder barrel 11 .

[0047] By dividing the shell 1 into three parts, namely, the cylinder 11, the first end cover 12 and the second end cover 13, the production personnel can process the cylinder 11, the first end cover 12 and the second end cover 13 respectively, so that the cylinder 11, the first end cover 12 and the second end cover 13 can be processed to form partial structures of the first connecting flow channel 14 and the second connecting flow channel 15 respectively, and then the cylinder 11, the first end cover 12 and the second end cover 13 are combined into a complete shell 1, so that the shell 1 defines the first connecting flow channel 14 and the second connecting flow channel 15, thereby reducing the processing difficulty of the shell 1.

[0048] Reference Figure 3 and Figure 4 , each driving component 2 is movably arranged in the corresponding motion cavity. It should be noted that part of the structure of the driving component 2 extends into the motion cavity and can move along the motion cavity. Specifically, each driving component 2 includes a moving part 21, a connecting part 22 and a slider 23. The moving part 21 can be constructed as a piston rod. The moving part 21 is slidably arranged in the motion cavity. The moving part 21 is suitable for moving along the motion cavity after being driven by a pressure medium. The pressure medium includes but is not limited to compressed gas and hydraulic oil. It should be noted that the piston mechanism can be connected to a medium provider, and the medium provider is used to provide a pressure medium such as compressed gas or hydraulic oil to the piston mechanism.

[0049] The pressure medium is suitable for being injected into the movement cavity from the first end of the housing 1 to drive the moving member 21 to move from the first end of the housing 1 toward the second end of the housing 1, and the pressure medium is suitable for being injected into the movement cavity from the second end of the housing 1 to drive the moving member 21 to move from the second end of the housing 1 toward the first end of the housing 1. The connecting member 22 is connected between the slider 23 and the moving member 21, and the two sliders 23 are both guided and matched with the guide member 3, wherein the guide member 3 can be a guide rail, and the two sliders 23 are suitable for opposite or reverse movement.

[0050] Reference Figure 4 The moving part 21 divides the moving cavity into a first sub-cavity 1111, a second sub-cavity 1112 and a third sub-cavity 1113. The first sub-cavity 1111 is arranged near the first end of the shell 1, the second sub-cavity 1112 is arranged near the second end of the shell 1, and the third sub-cavity 1113 is located between the first sub-cavity 1111 and the second sub-cavity 1112. The first sub-cavity 1111 and the third sub-cavity 1113, and the second sub-cavity 1112 and the third sub-cavity 1113 are sealed. Wear-resistant rings 212, sealing rings and dust rings are provided at both ends of the moving part 21 (the sealing rings and dust rings are not drawn in the figure). The wear-resistant rings 212, sealing rings and dust rings are arranged in sequence along the axial direction of the moving part 21. The wear-resistant rings 212, sealing rings and dust rings can jointly fill the gap between the outer peripheral wall of the moving part 21 and the side wall of the moving cavity, thereby achieving the technical effect of sealing between the first sub-cavity 1111 and the third sub-cavity 1113, and between the second sub-cavity 1112 and the third sub-cavity 1113.

[0051] By moving the moving member 21 in the moving cavity to adjust the volume of the first sub-cavity 1111 and the second sub-cavity 1112, the pressure medium can be filled into the first sub-cavity 1111 and the second sub-cavity 1112 to adjust the volume of the first sub-cavity 1111 and the second sub-cavity 1112. When the volume of the first sub-cavity 1111 and the second sub-cavity 1112 changes, the moving member 21 drives the slider 23 to move. In addition, by sealing the gap between the first sub-cavity 1111 and the third sub-cavity 1113 and the gap between the second sub-cavity 1112 and the third sub-cavity 1113, the pressure medium can be prevented from leaking from the first sub-cavity 1111 to the third sub-cavity 1113 and / or from the second sub-cavity 1112 to the third sub-cavity 1113 as much as possible, so as to avoid the lack of pressure in the first sub-cavity 1111 or the second sub-cavity 1112, which causes the multiple drive components 2 to fail to move synchronously.

[0052] Reference Figure 1 and Figure 4Further, the cylinder 11 is provided with an avoidance hole 112, which is connected to the second sub-cavity 1112. The avoidance hole 112 is used to avoid the connecting member 22, and the connecting member 22 can reciprocate between the slider 23 and the moving member 21 along the first direction of the housing 1 without hindrance. At this time, the first sub-cavity 1111 and the second sub-cavity 1112 are both sealed cavities, and the third sub-cavity 1113 is a non-sealed cavity. The wear-resistant ring 212, the sealing ring and the dust ring cooperate to prevent the pressure medium from leaking from the first sub-cavity 1111 and / or the second sub-cavity 1112 through the third sub-cavity 1113 to the outside of the housing 1.

[0053] Reference Figure 2 and Figure 4 Further, the two motion cavities may be a first motion cavity 113 and a second motion cavity 114, wherein the first motion cavity 113 may refer to Figure 1 The second movement cavity 114 may refer to the movement cavity near the right end of the housing 1. Figure 1 In the movement cavity near the left end of the shell 1, the first end cover 12 is provided with a first connecting hole 121 and a second connecting hole 122. The first connecting hole 121 is connected with the end of the first movement cavity 113 near the first end of the shell 1, and the first connecting hole 121 is connected with the end of the second movement cavity 114 near the second end of the shell 1, that is, the first connecting hole 121 is connected with the first sub-cavity 1111 of the first movement cavity 113 and the second sub-cavity 1112 of the second movement cavity 114 respectively.

[0054] In addition, the second connecting hole 122 is connected to the end of the second movement cavity 114 close to the first end of the shell 1, and the second connecting hole 122 is connected to the end of the first movement cavity 113 close to the second end of the shell 1, that is, the second connecting hole 122 is connected to the first sub-cavity 1111 of the second movement cavity 114 and the second sub-cavity 1112 of the first movement cavity 113 respectively. Such an arrangement allows the pressure medium to flow into or out of the first sub-cavity 1111 of the first movement cavity 113 and the second sub-cavity 1112 of the second movement cavity 114 through the first connecting hole 121, thereby adjusting the volume of the first sub-cavity 1111 of the first movement cavity 113 and the second sub-cavity 1112 of the second movement cavity 114, thereby driving the drive component 2 to move, and the pressure medium can flow into or out of the first sub-cavity 1111 of the second movement cavity 114 and the second sub-cavity 1112 of the first movement cavity 113 through the second connecting hole 122, thereby adjusting the volume of the first sub-cavity 1111 of the second movement cavity 114 and the second sub-cavity 1112 of the first movement cavity 113, thereby driving the drive component 2 to move.

[0055] It should be noted that, when the first connecting hole 121 fills the pressure medium into the first sub-cavity 1111 of the first movement cavity 113 and the second sub-cavity 1112 of the second movement cavity 114, the second connecting hole 122 discharges the pressure medium in the first sub-cavity 1111 of the second movement cavity 114 and the second sub-cavity 1112 of the first movement cavity 113. On the contrary, when the second connecting hole 122 fills the pressure medium into the first sub-cavity 1111 of the second movement cavity 114 and the second sub-cavity 1112 of the first movement cavity 113, the first connecting hole 121 discharges the pressure medium in the first sub-cavity 1111 of the first movement cavity 113 and the second sub-cavity 1112 of the second movement cavity 114, so that the pressures at both ends of the moving member 21 (i.e., in the first sub-cavity 1111 and the second sub-cavity 1112) are not consistent, so that the moving member 21 can move smoothly in the movement cavity. Furthermore, by alternately filling the pressure medium into the movement cavity through the first communication hole 121 and the second communication hole 122 , the plurality of driving components 2 can drive the corresponding sliders 23 to perform reciprocating motion.

[0056] In addition, the first connecting hole 121 and the second connecting hole 122 are blocked from each other, so that the pressure medium flowing into the first connecting hole 121 does not directly flow out from the second connecting hole 122, and the pressure medium flowing into the second connecting hole 122 does not directly flow out from the first connecting hole 121, so that the pressure medium can flow into the piston mechanism and be used to drive the drive component 2 to move.

[0057] Reference Figure 2-Figure 7 Further, the cylinder barrel 11, the first end cover 12 and the second end cover 13 jointly define a first communication channel 14 and a second communication channel 15, the second end cover 13 has a first communication port 131 connecting the movement cavity and the first communication channel 14, and the second end cover 13 has a second communication port 132 connecting the movement cavity and the second communication channel 15. It should be noted that in Figure 1 In the illustrated embodiment, the motion cavity connected to the first communication port 131 may refer to the second motion cavity 114, and the motion cavity connected to the second communication port 132 may refer to the first motion cavity 113. The first communication channel 14 extends between the first end and the second end, and the first communication channel 14 connects the first communication hole 121 and the end of the corresponding motion cavity close to the second end (i.e., one end of the first communication channel 14 connects to the first communication hole 121, and the other end connects to the second sub-cavity 1112 of the second motion cavity 114 through the second communication port 132); the second communication channel 15 connects the second communication hole 122 and the end of the corresponding motion cavity close to the second end (i.e., one end of the second communication channel 15 connects to the second communication hole 122, and the other end connects to the second sub-cavity 1112 of the first motion cavity 113 through the first communication port 131).

[0058] Reference Figure 3 and Figure 4 , further, the first end cover 12 and / or the second end cover 13 can be provided with a limit assembly 4, that is, the first end cover 12 can be provided with a limit assembly 4, or the second end cover 13 can be provided with a limit assembly 4, or both the first end cover 12 and the second end cover 13 can be provided with a limit assembly 4. Specifically, the limit assembly 4 includes two adjusting bolts 41 and two nuts 42. The adjusting bolts 41 pass through the second end cover 13 and are suitable for abutting with the moving member 21. By adjusting the length of the adjusting bolts 41 extending into the moving cavity, after the adjusting bolts 41 abut against the moving member 21, the adjusting bolts 41 can limit the moving member 21 from continuing to move close to the adjusting bolts 41, thereby achieving the technical effect of adjusting the movement stroke of the moving member 21. The nuts 42 are sleeved on the outside of the adjusting bolts 41 and are suitable for fixing the adjusting bolts 41 to the second end cover 13. Among them, the through hole of the second end cover 13 through which the adjusting bolts 41 pass is a threaded hole, and the threaded hole and the nuts 42 interlock to fix the adjusting bolts 41 to the second end cover 13.

[0059] In other embodiments, the distribution of the adjusting bolts 41 can also be the following two modes: one is that the adjusting bolts 41 pass through the first end cover 12 and are suitable for abutting against the moving part 21, and the movement stroke of the moving part 21 is adjusted by adjusting the length of the adjusting bolts 41 extending into the movement cavity; the other is that at least one adjusting bolt 41 passes through the first end cover 12 and is suitable for abutting against the moving part 21, and at least one adjusting bolt 41 passes through the second end cover 13 and is suitable for abutting against the moving part 21, and the movement stroke of the moving part 21 is adjusted by adjusting the length of the adjusting bolts 41 extending into the movement cavity. By adjusting the length of the adjusting bolts 41 extending into the movement cavity to adjust the movement stroke of the drive assembly 2, the drive assembly 2 can be accurately limited, thereby improving the movement accuracy of the piston mechanism.

[0060] Reference Figure 3 and Figure 6 Furthermore, a synchronization component 5 may be provided between the two moving members 21, and the synchronization component 5 is transmission-connected to the two moving members 21 so that the two moving members 21 move synchronously. The synchronization component 5 can improve the synchronous movement effect between the two moving members 21 transmission-connected to the synchronization component 5. Since the moving members 21 are arranged in the movement cavity and are suitable for driving the slider 23 to move, the slider 23 connected to the two moving members 21 also follows the moving members 21 to achieve synchronous movement, so that the piston mechanism of this scheme can be widely used in occasions of synchronous opening action.

[0061] Specifically, the synchronization assembly 5 includes a base 51 fixedly connected to the cylinder 11, a sleeve rod 52 arranged on the base 51, and a gear 53 sleeved on the sleeve rod 52. A plurality of meshing teeth are arranged on one side of the two moving members 21 close to the gear 53. The plurality of meshing teeth are arranged in sequence along the first direction of the housing 1, and the meshing teeth are meshed and connected with the gear 53. The gear 53 and the meshing teeth arranged on the moving member 21 are adopted to realize the synchronous movement of the two moving members 21, which is low in cost and simple in processing; and the synchronization assembly 5 does not need to be driven by a motor, so it can be used in a humid environment, has a wide range of applicable occasions, and has high operating stability.

[0062] The working principle of the embodiment of the present application is as follows: when the pressure medium is injected into the first connecting hole 121, the two driving components 2 are suitable for opposite movement, and the flow direction of the pressure medium is as follows: when the medium providing member provides the pressure medium to the first connecting hole 121, part of the pressure medium directly passes into the first sub-chamber 1111 of the first movement chamber 113, and part of the pressure medium passes into the second sub-chamber 1112 of the second movement chamber 114 through the first connecting channel 14; at the same time, the pressure medium in the second sub-chamber 1112 of the first movement chamber 113 flows to the second connecting hole 122 through the second connecting port 132 and the second connecting channel 15 in sequence and is discharged; the pressure medium in the first sub-chamber 1111 of the second movement chamber 114 flows out directly from the second connecting hole 122.

[0063] When the pressure medium is introduced into the second connecting hole 122 , the two driving components 2 are adapted to move in the opposite direction, and the flow direction of the pressure medium in this process is opposite to the flow direction of the pressure medium in the above process.

[0064] Therefore, when the pressure medium is injected into the first connecting hole 121, at least two driving components 2 are suitable for opposite movement, and when the pressure medium is injected into the second connecting hole 122, at least two driving components 2 are suitable for reverse movement, so that at least two driving components 2 are suitable for opposite or reverse movement, and the pressure medium can drive multiple driving components 2 to move synchronously in the opposite or reverse direction through the first connecting hole 121 or the second connecting hole 122. Compared with the prior art, the number of medium providers required for the operation of the piston mechanism can be reduced, and the movement synchronization of multiple sliders 23 in the piston mechanism can also be improved.

[0065] Based on this, the present application further discloses a clamping device. According to an embodiment of the present application, the clamping device includes the piston mechanism of the above-mentioned embodiment, wherein the clamping device has a medium provider and a clamping jaw, and the clamping jaw is installed on the slider 23 of the above-mentioned embodiment. The medium provider is selectively connected to the first connecting hole 121 or the second connecting hole 122. Specifically, when the medium provider is connected to the first connecting hole 121, the medium provider can provide pressure medium to the first connecting hole 121, and when the medium provider is connected to the second connecting hole 122, the medium provider can provide pressure medium to the second connecting hole 122. The clamping device can use the piston mechanism to clamp or release the object.

[0066] According to the clamping device described in the embodiment of the present application, a piston mechanism is arranged in the clamping device, and when pressure medium is injected into the first connecting hole 121 of the piston mechanism, at least two driving components 2 of the piston mechanism are suitable for opposite movement, and when pressure medium is injected into the second connecting hole 122 of the piston mechanism, at least two driving components 2 of the piston mechanism are suitable for reverse movement, so that at least two driving components 2 are suitable for opposite or reverse movement, and the pressure medium can drive multiple driving components 2 to synchronously move in the opposite or reverse direction through the first connecting hole 121 or the second connecting hole 122. Compared with the prior art, the number of medium providers required when the piston mechanism is working can be reduced, and the movement synchronization of multiple sliders 23 in the piston mechanism can also be improved, so that the clamping device can stably and reliably clamp the object.

[0067] The embodiments of this specific implementation method are all preferred embodiments for facilitating the understanding or implementation of the technical solution of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A piston mechanism, characterized in that: include: A shell (1), wherein a plurality of movement cavities are defined in the shell (1), wherein the movement cavities extend along a first direction of the shell (1), and along the first direction, the shell (1) has a first end and a second end; the shell (1) comprises a cylinder (11), a first end cover (12), and a second end cover (13); A plurality of drive components (2), the drive components (2) being movably arranged in the movement cavity, the pressure medium being suitable for being injected into the movement cavity from the first end to drive the drive components (2) to move from the first end toward the second end, and the pressure medium being suitable for being injected into the movement cavity from the second end to drive the drive components (2) to move from the second end toward the first end; A guide member (3), each of the driving components (2) having a slider (23), the sliders (23) of the plurality of driving components (2) are all guided and matched with the guide member (3), and at least two of the sliders (23) are suitable for moving in opposite directions or in opposite directions; The first end of the shell (1) is provided with a first communicating hole (121) and a second communicating hole (122); the first communicating hole (121) is communicated with an end portion of at least one of the movement cavities close to the first end and is communicated with an end portion of at least one of the movement cavities close to the second end; the second communicating hole (122) is communicated with an end portion of at least one of the movement cavities close to the first end and is communicated with an end portion of at least one of the movement cavities close to the second end; and the first communicating hole (121) and the second communicating hole (122) are mutually blocked; The housing (1) further defines a first communication channel (14) and a second communication channel (15), wherein the first communication channel (14) extends between the first end and the second end, and the first communication channel (14) communicates with the first communication hole (121) and an end portion of the corresponding movement cavity close to the second end; The second communication channel (15) extends between the first end and the second end, and the second communication channel (15) communicates with the second communication hole (122) and an end portion of the corresponding movement cavity close to the second end; The piston mechanism further comprises a synchronization component (5), each of the driving components (2) comprises a moving member (21), the moving member (21) is arranged in the moving cavity and is suitable for driving the slider (23) to move, the synchronization component (5) is arranged between at least two adjacent moving members (21), and the synchronization component (5) is transmission-connected to the corresponding two moving members (21) so that the corresponding two moving members (21) move synchronously; The synchronization component (5) comprises a base (51) fixedly connected to the cylinder (11), a sleeve rod (52) arranged on the base (51), and a gear (53) sleeved on the sleeve rod (52); a plurality of meshing teeth are provided on one side of the two moving parts (21) corresponding to the synchronization component (5) and close to the gear (53); the plurality of meshing teeth are arranged in sequence along the first direction, and the meshing teeth are meshingly connected with the gear (53).

2. The piston mechanism according to claim 1, characterized in that: The cylinder barrel (11) defines the movement cavity. Along the first direction, the first end cover (12) is connected to one end of the cylinder barrel (11) and the second end cover (13) is connected to the other end of the cylinder barrel (11). The first end cover (12) is provided with the first connecting hole (121) and the second connecting hole (122). The first end cover (12), the second end cover (13) and the cylinder barrel (11) jointly define the first connecting flow channel (14) and the second connecting flow channel (15). The second end cover (13) has a first connecting port (131) connecting the movement cavity and the first connecting flow channel (14), and the second end cover (13) has a second connecting port (132) connecting the movement cavity and the second connecting flow channel (15).

3. The piston mechanism according to claim 2, characterized in that: The first end cover (12) and / or the second end cover (13) is provided with a limit assembly (4), the limit assembly (4) comprising an adjusting bolt (41) and a nut (42), the adjusting bolt (41) passing through the end cover and being adapted to engage with the driving assembly (2), the movement stroke of the driving assembly (2) being adjusted by adjusting the length of the adjusting bolt (41) extending into the movement cavity, the nut (42) being sleeved on the outside of the adjusting bolt (41) and being adapted to fix the adjusting bolt (41) to the end cover.

4. The piston mechanism according to any one of claims 1 to 3, characterized in that: The driving assembly (2) is further provided with a moving member (21) and a connecting member (22); the moving member (21) is slidably disposed in the moving cavity; the moving member (21) is adapted to move after being driven by the pressure medium; and the connecting member (22) is connected between the slider (23) and the moving member (21).

5. The piston mechanism according to claim 4, characterized in that: The moving part (21) divides the moving cavity into a first sub-cavity (1111), a second sub-cavity (1112) and a third sub-cavity (1113); the first sub-cavity (1111) is arranged close to the first end, the second sub-cavity (1112) is arranged close to the second end, and the third sub-cavity (1113) is located between the first sub-cavity (1111) and the second sub-cavity (1112); the first sub-cavity (1111) and the third sub-cavity (1113) are sealed, and the second sub-cavity (1112) and the third sub-cavity (1113) are sealed; the moving part (21) moves in the moving cavity to adjust the volumes of the first sub-cavity (1111) and the second sub-cavity (1112).

6. The piston mechanism according to claim 5, characterized in that: The housing (1) is provided with an avoidance hole, the avoidance hole being in communication with the second sub-cavity (1112), and the avoidance hole being used to avoid the connecting member (22).

7. A clamping device, characterized in that: Comprising the piston mechanism according to any one of claims 1-6.

Images