Tamping rod with torsion spring device

Abstract

The application relates to the technical field of concrete mixing tools, in particular to a tamping rod with a torsional spring device, which comprises a rod body, a transmission shaft, an eccentric shaft assembly and a torsional spring device. The rod body comprises a connecting end, a first vibrating end and a second vibrating end, and the first vibrating end is located between the connecting end and the second vibrating end. The transmission shaft is provided with a first magnet. The eccentric shaft assembly comprises a first eccentric shaft and a second eccentric shaft, the first eccentric shaft is sleeved outside the second eccentric shaft, the second eccentric shaft is provided with a second magnet, and the other end of the first eccentric shaft is located outside the transmission shaft. The torsional spring device comprises a torsional spring body, a first connecting shell and a second connecting shell, the torsional spring body is connected with the first connecting shell and the second connecting shell respectively, the first connecting shell is connected with the second eccentric shaft, and the second connecting shell is located outside the transmission shaft and is selectively connected with the transmission shaft. The second connecting shell is selectively connected with the transmission shaft, the vibration area can be adjusted according to the depth of the concrete, and the advantages are realized.

Description

Technical Field

[0001] This application relates to the field of concrete mixing tools, and more specifically to a tamping rod with a torsion spring device. Background Technology

[0002] If uncured concrete contains air bubbles before setting, the concrete will have lower strength after setting. Therefore, the concrete is agitated using a concrete mixer to eliminate these air bubbles, thereby improving the overall strength of the concrete after setting. This process is called tamping. A tamping rod is a construction tool that uses vibration to eliminate air bubbles in concrete.

[0003] Patent document (CN216665050U) discloses a vibratory rod, including a rod body assembly, a flexible shaft assembly, and a flexible hose assembly. The flexible hose assembly is sleeved on the outside of the flexible shaft assembly. The rod body assembly includes a vibrating outer sleeve assembly and a vibratory rod assembly, which is installed inside the vibrating outer sleeve assembly. In use, the rod body assembly is placed in the concrete to be set. By vibrating the rod body assembly, the vibrating outer sleeve assembly is also vibrated to eliminate air bubbles in the concrete. The flexible shaft assembly reduces the vibration transmitted from the rod body assembly to the user, thus reducing the user's workload. However, because the vibratory rod assembly is a single unit, it can only vibrate as a whole, and the vibration transmitted to the user is constant. Due to varying depths of the concrete to be set, in some applications where the area is small due to external reinforcement and the concrete depth is shallow, the rod body assembly cannot be placed horizontally. When inserting the rod body assembly into the concrete, due to the shallow concrete depth, only the tip of the rod body assembly provides substantial vibration, but the overall vibration of the rod body assembly is still transmitted to the user's arm.

[0004] Therefore, there is a need for a tamping bar with a torsion spring device that can adjust the vibration zone according to the concrete depth. Summary of the Invention

[0005] The main objective of this application is to provide a tamping rod with a torsion spring device. The tamping rod includes a rod body, a drive shaft, an eccentric shaft assembly, and a torsion spring device. The rod body includes a connecting end, a first vibrating end, and a second vibrating end. The first vibrating end is located between the connecting end and the second vibrating end. The connecting end has a first accommodating cavity, the first vibrating end has a second accommodating cavity, and the second vibrating end has a third accommodating cavity. The drive shaft is rotatably mounted within the first accommodating cavity, and a first magnet is provided at one end of the drive shaft. The eccentric shaft assembly includes a first eccentric shaft and a second eccentric shaft. The first eccentric shaft is sleeved on the outside of the second eccentric shaft, and a second magnet is provided at one end of the second eccentric shaft. The other end of the eccentric shaft extends into the third accommodating cavity by a predetermined distance, one end of the first eccentric shaft extends into the second accommodating cavity, and the other end of the first eccentric shaft extends into the first accommodating cavity and is located outside the transmission shaft; the torsion spring device includes a torsion spring body, a first connecting shell, and a second connecting shell. The two ends of the torsion spring body are respectively connected to the first connecting shell and the second connecting shell. The first connecting shell is connected to the second eccentric shaft. The second connecting shell is located outside the transmission shaft and is selectively poweredly connected to the transmission shaft. By selectively powering the second connecting shell to the transmission shaft, the first vibration end can vibrate independently of the second vibration end. Compared with the prior art, it has the advantage of being able to adjust the vibration area according to the concrete depth.

[0006] Another objective of this application is to provide a tamping rod with a torsion spring device, wherein the side wall of the connecting end has a plurality of screw holes arranged in a ring array, and a plurality of first studs are threadedly connected to the side wall of the second connecting shell, the first studs abutting against or separating from the side wall of the drive shaft, thereby realizing selective power connection between the second connecting shell and the drive shaft.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a tamping rod with a torsion spring device, wherein the tamping rod with the torsion spring device comprises: The rod body includes a connecting end, a first vibrating end, and a second vibrating end. The first vibrating end is located between the connecting end and the second vibrating end. The connecting end has a first accommodating cavity, the first vibrating end has a second accommodating cavity, and the second vibrating end has a third accommodating cavity. A drive shaft is rotatably mounted in the first accommodating cavity, and a first magnet is provided at the end of the drive shaft; An eccentric shaft assembly includes a first eccentric shaft and a second eccentric shaft. The first eccentric shaft is sleeved on the outside of the second eccentric shaft. One end of the second eccentric shaft is provided with a second magnet. The other end of the second eccentric shaft extends into the third accommodating cavity by a predetermined distance. One end of the first eccentric shaft extends into the second accommodating cavity, and the other end of the first eccentric shaft extends into the first accommodating cavity and is located on the outside of the drive shaft. A torsion spring device, comprising a torsion spring body, a first connecting shell, and a second connecting shell, wherein the two ends of the torsion spring body are respectively connected to the first connecting shell and the second connecting shell, the first connecting shell is connected to the second eccentric shaft, and the second connecting shell is located outside the transmission shaft and is selectively poweredly connected to the transmission shaft.

[0008] In one or more embodiments of this application, the sidewall of the connecting end has a plurality of screw holes arranged in a ring array, and a plurality of first studs are threadedly connected to the sidewall of the second connecting shell, the first studs abutting against or separating from the sidewall of the transmission shaft.

[0009] In one or more embodiments of this application, the rod body further comprises a plurality of elastic pads, an elastic pad is provided between the first vibrating end and the second vibrating end, and an elastic pad is provided between the first vibrating end and the connecting end, wherein the first vibrating end and the second vibrating end are both made of flexible material.

[0010] In one or more embodiments of this application, the connecting end includes a fixed end, a first disassembly end, and a second disassembly end. The fixed end is connected to the first vibration end through the elastic pad. The first disassembly end is threadedly connected to the fixed end. The second disassembly end is threadedly connected to the end of the first disassembly end that is away from the fixed end. The first disassembly end and the second disassembly end cover the torsion spring device.

[0011] In one or more embodiments of this application, the first connecting shell is threadedly connected to the second eccentric shaft, and the thread tightening direction of the threaded portion on the second eccentric shaft is the same as the rotation direction of the transmission shaft.

[0012] In one or more embodiments of this application, the two ends of the torsion spring body are welded to the first connecting shell and the second connecting shell, respectively. When the second connecting shell rotates circumferentially, the torsion spring body is subjected to torsion and drives the first connecting shell and the first eccentric shaft to rotate circumferentially.

[0013] In one or more embodiments of this application, the sidewalls of both the first eccentric shaft and the second eccentric shaft have protrusions.

[0014] In one or more embodiments of this application, the end of the drive shaft opposite to the first magnet has a mating hole, and the mating hole and the sidewall have a plurality of fastening holes.

[0015] In this embodiment, the tamping rod with a torsion spring device includes a rod body, a drive shaft, an eccentric shaft assembly, and a torsion spring device. The rod body includes a connecting end, a first vibrating end, and a second vibrating end. The first vibrating end is located between the connecting end and the second vibrating end. The connecting end has a first accommodating cavity, the first vibrating end has a second accommodating cavity, and the second vibrating end has a third accommodating cavity. The drive shaft is rotatably mounted in the first accommodating cavity, and a first magnet is provided at the end of the drive shaft. The eccentric shaft assembly includes a first eccentric shaft and a second eccentric shaft. The first eccentric shaft is sleeved on the outside of the second eccentric shaft. A second magnet is provided at one end of the second eccentric shaft, and the other end of the second eccentric shaft extends into the first eccentric shaft. Within the three accommodating cavities at a predetermined distance, one end of the first eccentric shaft extends into the second accommodating cavity, and the other end of the first eccentric shaft extends into the first accommodating cavity and is located outside the drive shaft; the torsion spring device includes a torsion spring body, a first connecting shell, and a second connecting shell. The two ends of the torsion spring body are respectively connected to the first connecting shell and the second connecting shell. The first connecting shell is connected to the second eccentric shaft. The second connecting shell is located outside the drive shaft and is selectively poweredly connected to the drive shaft. By selectively powering the second connecting shell to the drive shaft, the first vibrating end can vibrate independently of the second vibrating end. Compared with the prior art, it has the advantage of being able to adjust the vibration area according to the concrete depth. Attached Figure Description

[0016] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein: Figure 1 The figure shows a schematic diagram of the structure of a tamping rod with a torsion spring device according to this application; Figure 2 The diagram shows... Figure 1 A magnified view of a portion at point C; Figure 3 The diagram shows... Figure 1 A magnified view of a portion at point D. Detailed Implementation

[0017] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0018] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0019] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0021] A schematic tamping bar with a torsion spring device, for reference. Figures 1 to 3 A preferred embodiment of the present invention provides a tamping rod with a torsion spring device, comprising a rod body 10, a drive shaft 20, an eccentric shaft assembly 30, and a torsion spring device 40.

[0022] Specifically, such as Figure 1 and Figure 2As shown, the rod body 10 includes a connecting end 101, a first vibrating end 102, and a second vibrating end 103. The first vibrating end 102 is located between the connecting end 101 and the second vibrating end 103. The connecting end 101 has a first accommodating cavity 1011, the first vibrating end 102 has a second accommodating cavity 1021, and the second vibrating end 103 has a third accommodating cavity 1031. Furthermore, the transmission shaft 20 is rotatably mounted within the first accommodating cavity 1011, and a first magnet is provided at the end of the transmission shaft 20. Additionally, the eccentric shaft assembly 30 includes a first eccentric shaft 301 and a second eccentric shaft 302. The first eccentric shaft 301 is sleeved on the outside of the second eccentric shaft 302, and a second magnet is provided at one end of the second eccentric shaft 302. The first magnet and the second magnet have opposite magnetic properties. The other end of the second eccentric shaft 302 extends into the third accommodating cavity 1031 by a predetermined distance. One end of the first eccentric shaft 301 extends into the second accommodating cavity 1021, and the other end of the first eccentric shaft 301 extends into the first accommodating cavity 1011 and is located outside the transmission shaft 20. In addition, the torsion spring device 40 includes a torsion spring body 401, a first connecting shell 402, and a second connecting shell 403. The two ends of the torsion spring body 401 are respectively connected to the first connecting shell 402 and the second connecting shell 403. The first connecting shell 402 is connected to the second eccentric shaft 302, and the second connecting shell 403 is located outside the transmission shaft 20 and is selectively poweredly connected to the transmission shaft 20.

[0023] It should be noted that, assuming the second connecting shell 403 is not poweredly connected to the drive shaft 20 at this time, when the drive shaft 20 rotates circumferentially, the first magnet applies a magnetic attraction force to the second magnet, thereby driving the second eccentric shaft 302 to rotate synchronously. The second eccentric shaft 302 vibrates during this circumferential rotation, causing the second vibrating end 103 to vibrate. However, since the second connecting shell 403 is not poweredly connected to the drive shaft 20, the first vibrating end 102 does not vibrate actively; rather, it vibrates because it is connected to the second vibrating end 103. The vibration is passively generated, and after being absorbed by the first vibrating end 102, it is transmitted to the connecting end 101 held by the operator. This results in a smaller overall vibration transmitted to the operator, reducing their workload. When dealing with large areas and deep sections of concrete to be set, by connecting the second connecting shell 403 to the drive shaft 20, the circumferential rotation of the drive shaft 20 will also drive the first eccentric shaft 301 to rotate circumferentially, thereby causing the first vibrating end 102 to vibrate actively. In this case, the tamping rod with the torsion spring device can be considered the same as the vibrating rod of the existing integrated vibration assembly. It is evident that, compared to the prior art, this application has the advantage of being able to adjust the vibration zone according to the depth of the concrete.

[0024] Furthermore, in order to specifically realize the selective power connection between the second connecting shell 403 and the drive shaft 20, the side wall of the connecting end 101 has a plurality of screw holes 1012 arranged in an annular array, and a plurality of first studs 50 are threadedly connected to the side wall of the second connecting shell 403, and the first studs 50 abut against or separate from the side wall of the drive shaft 20.

[0025] It should be noted that when the operator tightens the first stud 50 and makes the first stud 50 abut against the side wall of the drive shaft 20, the second connecting shell 403 will rotate circumferentially under the action of friction when the drive shaft 20 rotates. After passing through the soft connection of the torsion spring body 401, it will drive the first connecting shell 402 and the first eccentric shaft 301 to rotate circumferentially. The vibration of the first vibration end 102 will be reduced and transmitted to the drive shaft 20 through the torsion spring body 401.

[0026] Furthermore, to achieve a flexible connection between the first vibrating end 102 and the second vibrating end 103, such as... Figure 2As shown, the rod body 10 also has a plurality of elastic pads 104. An elastic pad 104 is provided between the first vibrating end 102 and the second vibrating end 103, and an elastic pad 104 is provided between the first vibrating end 102 and the connecting end 101. The materials of the first vibrating end 102 and the second vibrating end 103 are both flexible materials, such as rubber.

[0027] It should be noted that the connection between the elastic pad 104 and the first vibration end 102 and the second vibration end 103 includes, but is not limited to, adhesive connection, or connection of the elastic pad 104, the first vibration end 102 and the second vibration end 103 by means of wire. In addition, by providing the elastic pad 104, the vibration transmitted to the connection end 101 is further reduced.

[0028] Furthermore, in this application, as Figure 2 As shown, the connecting end 101 includes a fixed end 1013, a first disassembly end 1014, and a second disassembly end 1015. The fixed end 1013 is connected to the first vibration end 102 through the elastic pad 104. The first disassembly end 1014 is threadedly connected to the fixed end 1013. The second disassembly end 1015 is threadedly connected to the end of the first disassembly end 1014 that is away from the fixed end 1013. The first disassembly end 1014 and the second disassembly end cover the torsion spring device 40.

[0029] In addition, the first connecting shell 402 is threadedly connected to the second eccentric shaft 302, and the thread tightening direction of the threaded portion on the second eccentric shaft 302 is the same as the rotation direction of the transmission shaft 20.

[0030] In addition, the two ends of the torsion spring body 401 are welded to the first connecting shell 402 and the second connecting shell 403 respectively. When the second connecting shell 403 rotates circumferentially, the torsion spring body 401 is subjected to torsion and drives the first connecting shell 402 and the first eccentric shaft 301 to rotate circumferentially.

[0031] In addition, such as Figure 2 As shown, the first vibration end 102 has a stop hole 1022 on the side wall near the connection end 101. The stop hole 1022 is internally threaded with a second stud 60. The second stud 60 is normally spaced at a predetermined distance from the side wall of the first eccentric shaft 301. The stop hole 1022 is blocked by a plug.

[0032] It should be noted that when the lifespan of the torsion spring body 401 reaches its limit, the first stud 50 can be loosened and removed first, the second disassembly end 1015 can be loosened, the plug can be removed, and the second stud 60 can be brought into contact with the first eccentric shaft 301. Then, the second connecting shell 403 can be rotated in the unscrewing direction to loosen the first connecting shell 402 relative to the first eccentric shaft 301 and finally separate it. Then, the torsion spring device 40 can be removed and replaced by screwing on the first disassembly end 1014.

[0033] Furthermore, in order to achieve the eccentric movement of the first eccentric shaft 301 and the second eccentric shaft 302, the sidewalls of the first eccentric shaft 301 and the second eccentric shaft 302 both have protrusions.

[0034] Furthermore, to facilitate the power connection between the drive shaft 20 and the external rotary drive device, the end of the drive shaft 20 facing away from the first magnet has a mating hole 201, and the mating hole 201 and the side wall have a number of fastening holes 202.

[0035] It should be noted that one end of the external rotating component, which is powered by the shaft of the external rotating drive device, extends into the mating hole 201 and is fixed by the fastening bolt in the fastening hole 202.

[0036] Furthermore, to prevent the second eccentric shaft 302 from moving axially toward the first magnet, the tamping rod with torsion spring device also includes a limiting member 70. The side wall of the second eccentric shaft 302 has an annular groove, and one end of the limiting member 70 has a ball 701. The end of the limiting member 70 with the ball 701 extends into the annular groove, and the ball 701 abuts against the second eccentric shaft 302.

[0037] In summary, the tamping bar with torsion spring device described in the embodiments of this application is explained, which provides advantages such as the ability to adjust the vibration zone according to the concrete depth.

[0038] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. A tamping rod with a torsion spring device, characterized in that: The tamping rod with torsion spring device includes The rod body includes a connecting end, a first vibrating end, and a second vibrating end. The first vibrating end is located between the connecting end and the second vibrating end. The connecting end has a first accommodating cavity, the first vibrating end has a second accommodating cavity, and the second vibrating end has a third accommodating cavity. A drive shaft is rotatably mounted in the first accommodating cavity, and a first magnet is provided at the end of the drive shaft; An eccentric shaft assembly includes a first eccentric shaft and a second eccentric shaft. The first eccentric shaft is sleeved on the outside of the second eccentric shaft. One end of the second eccentric shaft is provided with a second magnet. The other end of the second eccentric shaft extends into the third accommodating cavity by a predetermined distance. One end of the first eccentric shaft extends into the second accommodating cavity, and the other end of the first eccentric shaft extends into the first accommodating cavity and is located on the outside of the drive shaft. A torsion spring device, comprising a torsion spring body, a first connecting shell, and a second connecting shell, wherein the two ends of the torsion spring body are respectively connected to the first connecting shell and the second connecting shell, the first connecting shell is connected to the second eccentric shaft, and the second connecting shell is located outside the transmission shaft and is selectively poweredly connected to the transmission shaft.

2. The tamping rod with torsion spring device according to claim 1, characterized in that: The sidewall of the connecting end has several screw holes arranged in a ring array, and several first studs are threadedly connected to the sidewall of the second connecting shell. The first studs abut against or separate from the sidewall of the transmission shaft.

3. The tamping rod with torsion spring device according to claim 2, characterized in that: The rod body also has several elastic pads. An elastic pad is provided between the first vibrating end and the second vibrating end, and an elastic pad is provided between the first vibrating end and the connecting end. The first vibrating end and the second vibrating end are both made of flexible materials.

4. The tamping rod with torsion spring device according to claim 3, characterized in that: The connecting end includes a fixed end, a first disassembly end, and a second disassembly end. The fixed end is connected to the first vibration end through the elastic pad. The first disassembly end is threadedly connected to the fixed end. The second disassembly end is threadedly connected to the end of the first disassembly end that is away from the fixed end. The first disassembly end and the second disassembly end cover the torsion spring device.

5. The tamping rod with torsion spring device according to claim 4, characterized in that: The first connecting shell is threadedly connected to the second eccentric shaft, and the thread tightening direction of the threaded portion on the second eccentric shaft is the same as the rotation direction of the transmission shaft.

6. The tamping rod with torsion spring device according to claim 5, characterized in that: The two ends of the torsion spring body are welded to the first connecting shell and the second connecting shell respectively. When the second connecting shell rotates circumferentially, the torsion spring body is subjected to torsion and drives the first connecting shell and the first eccentric shaft to rotate circumferentially.

7. The tamping rod with torsion spring device according to claim 6, characterized in that: Both the first eccentric shaft and the second eccentric shaft have protrusions on their sidewalls.

8. The tamping rod with torsion spring device according to claim 7, characterized in that: The end of the drive shaft opposite to the first magnet has a mating hole, and the mating hole and the side wall have several fastening holes.

Images