Piston rod with split structure
By setting insert blocks and slots on the piston head and piston rod, and using arc plates, positioning blocks and spring mechanisms, a stable limit connection between the piston rod and the piston head is achieved, solving the strength of the clamping structure in the prior art The problem of insufficient improvements in the stability and strength of the connection.
Patent Information
- Application Number
- CN202421397006.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-19
AI Technical Summary
During the use of existing split structure piston rods, the strength of the clamping structure is low, and it is easy to deform or break when used with a greater force, resulting in unstable connection between the piston rod and the piston head.
By setting a plug on the piston head and opening a slot on the piston rod, the piston rod is initially connected to the piston head, and a stable limit connection between the piston rod and the piston head is achieved through the arc plate, the positioning block and the spring mechanism.
The bending connection strength between the piston rod and the piston head is improved, ensuring the stable limit of the piston rod and the piston head, and enhancing the stability of the connection.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of piston rods, in particular to a piston rod with a split structure. Background Art
[0002] At present, oil cylinders are widely used in machine tools, engineering machinery and other fields. As an important part of the oil cylinder, the piston rod is usually made into one piece. However, when the diameter of the piston and the piston rod differ greatly, the piston and the piston rod need to be made into separate parts in consideration of the manufacturing cost. When the piston rod and the piston are in use, the piston and the piston rod need to be fixed together. At present, the commonly used fixing method of the piston and the piston rod is thread fixing. However, this fixing method will cause the thread to loosen during use.
[0003] The utility model with publication number CN 218624825 U discloses a split-structure piston rod, including a piston rod, a piston head slidably connected to the lower end of the piston rod, a sealing ring is sleeved on the outer side of the piston head, a connecting component is arranged on the upper end of the piston head and the outer side of the piston rod, the connecting component includes a connecting ring whose one end is fixedly connected to the upper end of the piston head and is located on the outer side of the piston rod, a connecting frame located on the outer side of the connecting ring is fixedly connected to the outer side of the piston rod, an installation groove is opened on the outer side of the connecting ring, and a limit block whose one end extends to the inside of the connecting frame is slidably connected to the inner side of the installation groove.
[0004] As shown in the above-mentioned utility model, the existing split structure piston rod generally limits the piston rod and the piston head through a clamping structure so that the piston rod and the piston head will not separate. However, the general clamping structure has low strength. When a large force is used, the clamping structure is easy to deform or break, making the connection between the piston rod and the piston head unstable. Utility Model Content
[0005] In view of the deficiencies in the prior art, the utility model provides a split-structure piston rod to solve the above-mentioned problems.
[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a split structure piston rod, comprising:
[0007] A piston head, a plurality of sealing rings distributed at equal intervals are bonded to the periphery of the piston head, and an insert block is fixed to the middle of one side of the piston head;
[0008] A piston rod, one end of which is provided with a slot, and the insert block is adapted to the slot;
[0009] A connecting assembly, which is fixed to one side of the piston head and connected to the outer side of one end of the piston rod, and is used for limiting the connection between the piston rod and the piston head;
[0010] The limiting assembly is arranged on the outside of the connecting assembly and is used to limit the connecting assembly and stably connect the piston head and the piston rod.
[0011] Preferably, a plurality of protrusions in a ring array are fixed to the outer side of the plug, a plurality of linear grooves distributed in a ring array are opened on the inner wall of the slot, the linear grooves are adapted to the protrusions, an arc groove is opened on one side of the groove bottom of the linear groove, and the arc groove corresponds to the protrusion.
[0012] Preferably, a plurality of positioning grooves distributed in a ring array are formed on the outer side wall of the piston rod, and the positioning grooves correspond to the connecting components.
[0013] Preferably, the connecting assembly includes a plurality of arc-shaped plates distributed in a ring array and fixed on one side of the piston head, a through groove is opened in the middle of one end of the arc-shaped plate, a positioning block is connected through the through groove, one end of the positioning block is adapted to the positioning groove, a connecting plate is fixed to one end of the positioning block, first springs are fixed on the inner sides of both ends of the connecting plate, spring grooves are opened on the outer sides of both sides of one end of the arc-shaped plate, one end of the first spring is inserted into the spring groove and fixed to the bottom of the spring groove.
[0014] Preferably, the limiting assembly comprises an annular plate sleeved on the outer sides of a plurality of arc-shaped plates, a notch is formed on the inner side of the upper end of the annular plate, and the notch is adapted to the thickness of the connecting plate.
[0015] Preferably, a plurality of dovetail sliders distributed in a circular array are fixed on the inner wall of the lower end of the annular plate, a dovetail groove is opened in the middle of the outer edge of the arc plate, the dovetail slider is located in the dovetail groove, and the bottom end of the dovetail slider is connected to the inner wall of the lower end of the dovetail groove through a second spring.
[0016] Beneficial Effects
[0017] The utility model provides a split-structure piston rod. Compared with the prior art, it has the following beneficial effects:
[0018] 1. The split structure piston rod is provided with an insert block on the piston head and a slot on the piston rod to preliminarily connect the piston rod and the piston head, thereby improving the bending connection strength of the piston rod and the piston head. The protrusion on the insert block cooperates with the arc groove in the slot to preliminarily limit the piston rod and the piston head. The positioning block on the arc plate cooperates with the positioning groove on the piston rod to position the piston rod, and then the piston rod and the piston head are stably limited, so that the piston rod and the piston head are stably connected.
[0019] 2. The split-structure piston rod is provided with an annular plate sleeved on the outside of a plurality of arc-shaped plates. Under the action of the second spring, the annular plate can be limited by the notch thereon to prevent the annular plate from moving outward, so that the positioning block and the positioning groove are stably plugged and limited, thereby improving the stability of the connection between the piston rod and the piston head. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0021] Figure 2 This is a schematic diagram of the piston head structure of the utility model;
[0022] Figure 3 This is a schematic diagram of the piston rod structure of the utility model;
[0023] Figure 4 It is a cross-sectional schematic diagram of the arc groove structure of the utility model;
[0024] Figure 5 This is a schematic diagram of the arc plate structure of the utility model;
[0025] Figure 6 This is a schematic diagram of the positioning block structure of the utility model;
[0026] Figure 7 It is a schematic diagram of the structure of the limit assembly of the utility model.
[0027] In the figure: piston head 1, plug block 11, protrusion 12, piston rod 2, slot 21, linear groove 22, arc groove 23, positioning groove 24, connecting component 3, arc plate 31, through groove 32, positioning block 33, connecting piece 34, first spring 35, spring groove 36, limit assembly 4, annular plate 41, notch 42, dovetail slider 43, dovetail slide groove 44, second spring 45 DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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] The utility model provides two technical solutions:
[0030] Figure 1-6The first embodiment is shown: a split structure piston rod 2, including a piston head 1, a plurality of sealing rings distributed at equal intervals are bonded to the circumference of the piston head 1 to play a sealing role, an insert block 11 is fixed to the middle of one side of the piston head 1, and a plurality of protrusions 12 distributed in a ring array are fixed to the outer side of the insert block 11.
[0031] The piston rod 2 has a slot 21 at one end thereof, and the insert block 11 is matched with the slot 21, thereby improving the connection strength between the piston rod 2 and the piston head 1. The inner wall of the slot 21 has a plurality of linear grooves 22 distributed in a circular array, and the linear grooves 22 are matched with the protrusions 12. An arc groove 23 is provided on one side of the groove bottom of the linear groove 22, and the arc groove 23 corresponds to the protrusion 12, thereby preliminarily limiting the position of the piston rod 2 and the piston head 1. The outer wall of the piston rod 2 has a plurality of positioning grooves 24 distributed in a circular array, and the positioning grooves 24 correspond to the connecting component 3. The positioning grooves 24 cooperate with the connecting component 3 to stably limit the positioning grooves 24 and the connecting component 3.
[0032] The connecting component 3 is fixed on one side of the piston head 1, and the connecting component 3 is connected to the outer side of one end of the piston rod 2, and is used for the limited connection between the piston rod 2 and the piston head 1. The connecting component 3 includes a plurality of arc-shaped plates 31 distributed in a ring array and fixed on one side of the piston head 1. A through groove 32 is opened in the middle of one end of the arc-shaped plate 31. The inner edge of one end of the arc-shaped plate 31 is set as an inclined opening to facilitate the insertion of the piston rod 2. A positioning block 33 is connected through the through groove 32, and one end of the positioning block 33 is adapted to the positioning groove 24. One end of the positioning block 33 is set as an inclined surface. When the piston rod 2 is inserted, one end of the positioning block 33 is squeezed and moved into the through groove 32 without affecting the insertion of the piston rod 2. A connecting plate is fixed to one end of the positioning block 33. First springs 35 are fixed to the inner sides of both ends of the connecting plate. Spring grooves 36 are opened on both sides of the outer sides of one end of the arc plate 31. One end of the first spring 35 is inserted into the spring groove 36 and fixed to the bottom of the spring groove 36. The setting of the first spring 35 enables the positioning block 33 to be automatically inserted into the positioning groove 24.
[0033] Figure 1-27 shows a second embodiment, which is mainly different from the first embodiment in that: it includes a limit assembly 4, which is arranged on the outside of the connecting assembly 3 and is used to limit the connecting assembly 3 and stably connect the piston head 1 and the piston rod 2. The limit assembly 4 includes an annular plate 41 sleeved on the outside of multiple arc-shaped plates 31, and a notch 42 is provided on the inner side of the upper end of the annular plate 41. The notch 42 is adapted to the thickness of the connecting plate. A plurality of dovetail sliders 43 distributed in an annular array are fixed on the inner wall of the lower end of the annular plate 41. The middle part of the outer edge of the arc-shaped plate 31 A dovetail slot 44 is provided, and a dovetail slider 43 is located in the dovetail slot 44. The dovetail slot 44 cooperates with the dovetail slider 43 to enable the annular plate 41 to maintain vertical up and down movement, and the bottom end of the dovetail slider 43 is connected to the lower end inner wall of the dovetail slot 44 through a second spring 45. The second spring 45 is provided so that the annular plate 41 can automatically move upward when the connecting plate fits the arc plate 31, thereby limiting the connecting plate and further limiting the positioning block 33, so that the positioning block 33 is stably clamped in the positioning slot 24, thereby stably limiting the piston rod 2 and the piston head 1.
[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.
[0035] When in use, first insert the piston rod 2 into the space surrounded by multiple arc plates 31. At this time, the positioning block 33 is forced to move into the through groove 32, and the first spring 35 is stretched and stressed until the insert block 11 is inserted into the slot 21. At this time, the protrusion 12 is located in the linear groove 22. When the protrusion 12 moves into the arc groove 23, the piston rod 2 is rotated to move the protrusion 12 into the arc groove 23 until the positioning block 33 on the arc plate 31 corresponds to the positioning groove 24 on the piston rod 2. At this time, the positioning block 33 is automatically inserted into the positioning groove 24 under the drive of the first spring 35, limiting the piston rod 2 and the piston head 1. Then the annular plate 41 moves upward under the action of the second spring 45 until the connecting plate is located in the notch 42 on the annular plate 41. The annular plate 41 limits the connecting plate, and then the positioning block 33 is stably clamped in the positioning groove 24, so that the piston rod 2 and the piston head 1 are stably limited.
[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A split structure piston rod, characterized in that: include: A piston head, a plurality of sealing rings distributed at equal intervals are bonded to the periphery of the piston head, and an insert block is fixed to the middle of one side of the piston head; A piston rod, one end of which is provided with a slot, and the insert block is adapted to the slot; A connecting assembly, which is fixed to one side of the piston head and connected to the outer side of one end of the piston rod, and is used for limiting the connection between the piston rod and the piston head; The limiting assembly is arranged on the outside of the connecting assembly and is used to limit the connecting assembly and stably connect the piston head and the piston rod.
2. A split-structure piston rod according to claim 1, characterized in that: A plurality of protrusions in a circular array are fixed to the outer side of the plug, a plurality of linear grooves in a circular array are opened on the inner wall of the slot, the linear grooves are adapted to the protrusions, an arc groove is opened on one side of the groove bottom of the linear groove, and the arc groove corresponds to the protrusion.
3. The split-structure piston rod according to claim 1, characterized in that: A plurality of positioning grooves distributed in a ring array are provided on the outer side wall of the piston rod, and the positioning grooves correspond to the connecting components.
4. The split-structure piston rod according to claim 1, characterized in that: The connecting assembly includes a plurality of arc-shaped plates distributed in a ring array and fixed on one side of the piston head, a through groove is opened in the middle of one end of the arc-shaped plate, a positioning block is connected through the through groove, one end of the positioning block is adapted to the positioning groove, a connecting plate is fixed to one end of the positioning block, first springs are fixed to the inner sides of both ends of the connecting plate, spring grooves are opened on the outer sides of both sides of one end of the arc-shaped plate, one end of the first spring is inserted into the spring groove and fixed to the bottom of the spring groove.
5. The split-structure piston rod according to claim 1, characterized in that: The limiting assembly comprises an annular plate sleeved on the outer sides of a plurality of arc-shaped plates, a notch is provided on the inner side of the upper end of the annular plate, and the notch is adapted to the thickness of the connecting plate.
6. The split-structure piston rod according to claim 5, characterized in that: A plurality of dovetail sliders distributed in a circular array are fixed on the inner wall of the lower end of the annular plate, a dovetail slot is opened in the middle of the outer edge of the arc plate, the dovetail slider is located in the dovetail slot, and the bottom end of the dovetail slider is connected to the inner wall of the lower end of the dovetail slot through a second spring.