Lifting rod assembly

Abstract

The utility model provides a lifting rod assembly which comprises an adjusting screw tube and a screw rod, one end of the screw rod is connected with the adjusting screw tube through threads, and the other end of the screw rod is provided with a connecting piece which can be used for being connected with an external machine tool. A limiting boss is arranged on the side face of the connecting piece, an adjusting sleeve capable of sliding in the axial direction of the adjusting sleeve is arranged on the adjusting screw pipe in a sleeving mode, a limiting groove right facing the limiting boss is formed in one end of the adjusting sleeve, and when the adjusting sleeve gets close to the connecting piece, the limiting groove can be buckled to the limiting boss; a handle is further arranged on the outer side of the adjusting sleeve. According to the lifting device, the adjusting sleeve can be rotated through the handle, the length of the lifting rod can be adjusted without an external tool, and operation is convenient; when the length does not need to be adjusted, the limiting groove of the adjusting sleeve is buckled to the limiting boss of the connecting piece, the adjusting sleeve can be prevented from rotating under the accidental conditions of vibration, impact and the like, accidental extension of the lifting rod is avoided, and reliability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor lifting rods, in particular to a lifting rod assembly. Background Art

[0002] The lifting rod assembly includes an adjustment solenoid, with screws connected at both ends. One screw has a connecting ring at its other end, and the other has a connecting fork at its other end. The adjustment solenoid can be adjusted in length by rotating it relative to either screw. However, to adjust the length, a tool such as a wrench or crowbar is required to engage the plate-hole structure on the outside of the adjustment solenoid, levering the force to rotate the adjustment solenoid, making it inconvenient to operate. Furthermore, if the thread resistance between the adjustment solenoid and the screw is reduced, the screw can easily loosen and stretch in unexpected situations. If the screw is too long during use, the deflection increases, posing a risk of breakage.

[0003] Furthermore, the screw and fork are connected by a threaded connection. When in use, the fork is angled downward to connect to the external tool. This can easily cause the screw and fork to loosen, leading to the fork coming loose. To prevent the fork from loosening, some products include a pin hole where the screw and fork meet and insert an elastic cylindrical pin to retain the pin. Due to the gap between the elastic cylindrical pin and the pin hole, the pin can easily wear out during use, causing it to break or fall out, or deform, making it difficult to remove for maintenance. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to facilitate the adjustment of the length of the lifting rod assembly and at the same time prevent the lifting rod assembly from loosening and stretching in unexpected circumstances.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] The utility model provides a lifting rod assembly, including an adjusting screw and a screw, one end of the screw is connected to the adjusting screw by a thread, and the other end of the screw is provided with a connecting piece that can be used to connect to external machinery; a limiting boss is provided on the side of the connecting piece, and an adjusting sleeve that can slide along its own axial direction is sleeved on the adjusting screw, and a limiting groove facing the limiting boss is provided at one end of the adjusting sleeve. When the adjusting sleeve approaches the connecting piece, the limiting groove can be buckled on the limiting boss; a handle is also provided on the outside of the adjusting sleeve.

[0007] The beneficial effects of the utility model are:

[0008] By adopting the utility model, the adjusting sleeve can be rotated by leveraging the handle, and the adjusting sleeve drives the adjusting screw to rotate relative to the screw rod, so that the length of the lifting rod can be adjusted without the aid of external tools, and the operation is convenient; when the length does not need to be adjusted, the limiting groove of the adjusting sleeve is engaged with the limiting boss of the connecting part, which can prevent the adjusting sleeve from rotating under unexpected circumstances such as vibration and impact, thereby avoiding accidental extension of the lifting rod and having good reliability.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a guide bar is fixed to the outer side of the adjusting screw along its own axial direction, and the guide bar is slidably connected to the adjusting sleeve.

[0011] The guide bar can guide the adjusting sleeve to slide in the axial direction and can transmit the torque of the adjusting sleeve to the adjusting screw tube at the same time, so the reliability is good.

[0012] Furthermore, at least two guide bars are provided, and the guide bars are evenly distributed along the outer circumference of the regulating spiral tube.

[0013] It is convenient to reduce the stress of a single guide bar when transmitting torque, thereby improving the load-bearing capacity.

[0014] Furthermore, there are two screws, which are respectively located at the two ends of the adjusting spiral tube.

[0015] It is convenient to adjust the extension length of the screw rod from both ends of the adjusting screw tube. When the lifting rod is extended, the strength and rigidity of the single screw rod are improved, and the reliability is good.

[0016] Furthermore, the two screws are connected to the adjusting solenoid tube through threads with opposite rotation directions.

[0017] When the adjusting screw rotates, the two screws extend or shorten at the same time, which improves the efficiency of adjusting the length of the lifting rod, and can be adjusted during use, which is easy to operate; when in use, only one end of the adjusting sleeve needs to be buckled and locked with the limit boss to prevent the adjusting sleeve from rotating.

[0018] Furthermore, connecting parts are provided at both ends of the adjusting spiral tube, the diameter of the connecting parts is smaller than the diameter of the adjusting spiral tube, and the connecting parts are connected to the screw rod through threads.

[0019] The thread cutting length is short, and the two connecting sections are convenient for processing opposite threads, making processing easy.

[0020] Furthermore, the limiting boss is provided on the connecting piece located below the adjusting sleeve.

[0021] When in use, the adjusting sleeve falls down close to the connecting piece below under the action of its own weight, so that the limiting groove is automatically buckled on the limiting boss.

[0022] Furthermore, the connecting piece on one of the screw rods is a connecting fork, and the connecting piece on the other screw rod is a connecting ring.

[0023] The connecting fork is usually located at the lower end and can be used to connect external implements; the connecting ring can be used to connect to the tractor.

[0024] Furthermore, the middle part of the connecting fork is connected to the screw rod through a thread, a pin hole is drilled on one side of the connecting fork, the pin hole extends into the screw rod, an elastic cylindrical pin is provided in the pin hole, and the elastic cylindrical pin is interference fit with the pin hole; the length of the elastic cylindrical pin is smaller than the diameter of the screw rod.

[0025] By first connecting the connecting fork and the screw and then drilling the pin hole and inserting the elastic cylindrical pin, relative looseness between the connecting fork and the screw is avoided; through interference fit, wear and deformation of the elastic cylindrical pin is avoided; during maintenance, the elastic cylindrical pin can be chiseled into the screw, and the screw can be unscrewed from the connecting fork, and then the elastic cylindrical pin can be chiseled out from the screw, and the next installation can be prepared. Only one elastic cylindrical pin needs to be replaced, and the maintenance cost is low.

[0026] Furthermore, limiting bosses are provided on opposite sides of the connecting member, and limiting grooves are provided on opposite sides of one end of the adjusting sleeve.

[0027] It is convenient to improve the limit stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the present utility model.

[0029] Figure 2 It is a front view of the utility model.

[0030] Figure 3 for Figure 2 side view.

[0031] Figure 4 Schematic diagram of the structure of the regulating spiral tube.

[0032] Figure 5 It is an axial cross-sectional view of the connecting fork along the elastic cylindrical pin.

[0033] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0034] 1-adjusting screw; 2-screw; 3-limiting boss; 4-adjusting sleeve; 5-handle; 6-guide bar; 7-connecting part; 8-connecting fork; 9-connecting ring; 10-pin hole; 11-elastic cylindrical pin. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] This utility model refers to Figure 1-5 .

[0037] The utility model provides a lifting rod assembly, including an adjusting screw 1 and a screw 2, one end of the screw 2 is connected to the adjusting screw 1 by a thread, and the other end of the screw 2 is provided with a connecting piece that can be used to connect to external equipment; a limiting boss 3 is provided on the side of the connecting piece, and an adjusting sleeve 4 that can slide along its own axial direction is sleeved on the adjusting screw 1, and a limiting groove facing the limiting boss 3 is opened at one end of the adjusting sleeve 4. When the adjusting sleeve 4 approaches the connecting piece, the limiting groove can be buckled on the limiting boss 3; a handle 5 is also provided on the outside of the adjusting sleeve 4.

[0038] principle:

[0039] The adjusting screw 1 can be directly connected to a connector at one end, or both ends can be connected to a screw 2. If two screws 2 are used, a stop boss 3 can be provided on both connectors, or only on one. The adjusting sleeve 4 can slide axially along the adjusting screw 1 but cannot rotate. To adjust the length, secure the connector, slide the adjusting sleeve 4 until it disengages the stop boss 3, and then rotate the handle 5. This rotates the adjusting screw 1 relative to the screw 2, thereby adjusting the length.

[0040] By adopting the utility model, the adjusting sleeve 4 can be rotated by leveraging the handle 5, and the adjusting sleeve 4 drives the adjusting screw 1 to rotate relative to the screw rod 2. The length of the lifting rod can be adjusted without the aid of external tools, and the operation is convenient; when the length does not need to be adjusted, the limiting groove of the adjusting sleeve 4 is engaged with the limiting boss 3 of the connecting part, which can prevent the adjusting sleeve 4 from rotating under unexpected circumstances such as vibration and impact, thereby avoiding accidental extension of the lifting rod and having good reliability.

[0041] Further, such as Figure 4 As shown, a guide bar 6 is fixed to the outer side of the adjusting screw 1 along its own axial direction, and the guide bar 6 is slidably connected to the adjusting sleeve 4.

[0042] The guide strip 6 can guide the adjusting sleeve 4 to slide in the axial direction, and at the same time can transmit the torque of the adjusting sleeve 4 to the adjusting screw 1, so the reliability is good.

[0043] Furthermore, at least two guide bars 6 are provided, and the guide bars 6 are evenly distributed along the outer circumference of the regulating coil 1 .

[0044] This facilitates reducing the stress of a single guide bar 6 when transmitting torque, thereby improving the bearing capacity.

[0045] Further, such as Figure 1-3 As shown: there are two screw rods 2, which are respectively located at the two ends of the adjusting spiral tube 1.

[0046] It is convenient to adjust the extension length of the screw rod 2 from both ends of the adjusting screw tube 1. When the lifting rod is extended, the strength and rigidity of the single screw rod 2 are improved, and the reliability is good.

[0047] Furthermore, the two screw rods 2 are connected to the adjusting solenoid 1 through threads with opposite rotation directions.

[0048] When the adjusting screw 1 rotates, the two screws 2 extend or shorten at the same time, which improves the efficiency of adjusting the length of the lifting rod, and can be adjusted during use, which is easy to operate; when in use, only one end of the adjusting sleeve 4 needs to be buckled and locked with the limit boss 3 to prevent the adjusting sleeve 4 from rotating.

[0049] Furthermore, connecting parts 7 are provided at both ends of the adjusting screw tube 1 . The diameter of the connecting parts 7 is smaller than the diameter of the adjusting screw tube 1 . The connecting parts 7 are connected to the screw rod 2 through threads.

[0050] The thread cutting length is short, and the two connecting parts 7 are convenient for processing opposite threads, which makes processing easy.

[0051] Furthermore, the limiting boss 3 is provided on the connecting piece located below the adjusting sleeve 4 .

[0052] During use, the adjusting sleeve 4 falls down to the lower connecting piece under the action of its own weight, so that the limiting groove is automatically buckled on the limiting boss 3.

[0053] Furthermore, the connecting piece on one of the screw rods 2 is a connecting fork 8 , and the connecting piece on the other screw rod 2 is a connecting ring 9 .

[0054] Preferably, the connecting ring 9 is rotatably connected to the screw rod 2 (a similar ball joint or other connection method can be used, or a fixed connection can be used).

[0055] The connecting fork 8 is generally located at the lower end and can be used to connect an external implement; the connecting ring 9 can be used to connect a tractor.

[0056] Further, such as Figure 5 As shown: the middle part of the connecting fork 8 is connected to the screw rod 2 through a thread, and a pin hole 10 is drilled on one side of the connecting fork 8. The pin hole 10 extends into the screw rod 2. An elastic cylindrical pin 11 is provided in the pin hole 10. The elastic cylindrical pin 11 is interference fit with the pin hole 10; the length of the elastic cylindrical pin 11 is smaller than the diameter of the screw rod 2.

[0057] By first connecting the connecting fork 8 and the screw rod 2 and then drilling the pin hole 10 and inserting the elastic cylindrical pin 11, the connecting fork 8 and the screw rod 2 are prevented from being loose relative to each other; the interference fit prevents the wear and deformation of the elastic cylindrical pin 11; during maintenance, the elastic cylindrical pin 11 can be chiseled into the screw rod 2, and the screw rod 2 can be unscrewed from the connecting fork 8, and then the elastic cylindrical pin 11 can be chiseled out from the screw rod 2 (at this time, the pin hole 10 can be drilled to pass through the screw rod 2), and then the next installation can be prepared. Only one elastic cylindrical pin 11 needs to be replaced, and the maintenance cost is low.

[0058] Furthermore, limiting bosses 3 are provided on opposite sides of the connecting member, and limiting grooves are provided on opposite sides of one end of the adjusting sleeve 4.

[0059] It is convenient to improve the limit stability.

[0060] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as: "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0061] In addition, if there are order description terms, such as "first", "second", etc., their use in this specification is to facilitate understanding or simplify the description. For example, in order to distinguish multiple technical features with the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of such features. In the description of this utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, if terms describing the relative functional relationship of structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be fixed connections, detachable connections, or integrated; can be mechanical connections or electrical connections; can be direct connections or indirect connections through an intermediate medium, can be internal connections between two elements or interactive relationships between two elements; "fix" can be fixed to form an integral body, or can be detachably fixed through fasteners; can be directly fixed or fixed through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the preceding and following texts, etc.

[0063] In this utility model, if descriptive terms with ancillary or connecting meaning appear, for example, a first feature being "on" or "below" a second feature, these should not be interpreted as limiting unless otherwise expressly specified or limited. For example, "on" or "below" may refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediary. Those skilled in the art will understand the specific meanings of these descriptive terms in this utility model based on the specific circumstances, context, and coherence of the preceding and following texts.

[0064] Furthermore, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of different embodiments and examples described in this specification, unless there is any contradiction, and these combinations or combinations should all fall within the scope summarized by the present invention.

[0066] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in the field within the scope of information available from public channels and in combination with the technical inspiration given by the application documents are still within the scope of protection of the present application.

Claims

1. A lifting rod assembly, characterized in that: The invention comprises an adjusting screw (1) and a screw (2), wherein one end of the screw (2) is connected to the adjusting screw (1) by a thread, and the other end of the screw (2) is provided with a connector that can be used to connect to an external machine; a limiting boss (3) is provided on the side of the connector, and an adjusting sleeve (4) that can slide along its own axis is sleeved on the adjusting screw (1); a limiting groove facing the limiting boss (3) is provided on one end of the adjusting sleeve (4); when the adjusting sleeve (4) approaches the connector, the limiting groove can be buckled on the limiting boss (3); and a handle (5) is also provided on the outside of the adjusting sleeve (4).

2. The lifting rod assembly according to claim 1, characterized in that: A guide bar (6) is fixed on the outer side of the adjusting screw tube (1) along its own axial direction, and the guide bar (6) is slidably connected to the adjusting sleeve (4).

3. The lifting rod assembly according to claim 2, characterized in that: At least two guide bars (6) are provided, and the guide bars (6) are evenly distributed along the outer peripheral side of the regulating spiral tube (1).

4. The lifting rod assembly according to claim 1, characterized in that: There are two screw rods (2), which are respectively located at the two ends of the regulating spiral tube (1).

5. The lifting rod assembly according to claim 4, characterized in that: The two screw rods (2) are respectively connected to the regulating screw tube (1) through threads with opposite rotation directions.

6. The lifting rod assembly according to claim 5, characterized in that: Connecting parts (7) are provided at both ends of the regulating spiral tube (1); the diameter of the connecting part (7) is smaller than the diameter of the regulating spiral tube (1); and the connecting part (7) is connected to the screw rod (2) via threads.

7. The lifting rod assembly according to claim 4, characterized in that: The limiting boss (3) is provided on the connecting piece located below the adjusting sleeve (4).

8. The lifting rod assembly according to claim 4, characterized in that: The connecting piece on one of the screw rods (2) is a connecting fork (8), and the connecting piece on the other screw rod (2) is a connecting ring (9).

9. The lifting rod assembly according to claim 8, characterized in that: The middle part of the connecting fork (8) is connected to the screw rod (2) through a thread, a pin hole (10) is drilled on one side of the connecting fork (8), the pin hole (10) extends into the screw rod (2), an elastic cylindrical pin (11) is provided in the pin hole (10), and the elastic cylindrical pin (11) is interference fit with the pin hole (10); the length of the elastic cylindrical pin (11) is less than the diameter of the screw rod (2).

10. The lifting rod assembly according to claim 1, characterized in that: The connecting member is provided with limiting bosses (3) on opposite sides, and one end of the adjusting sleeve (4) is provided with limiting grooves on opposite sides.

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