Back-carry device
By designing a hose guide and housing structure on the back-mounted device, the problems of heavy handheld concrete vibrators and damage to concrete caused by the hose were solved, achieving uniform load distribution and improved user safety and comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HILTI AG
- Filing Date
- 2022-07-18
- Publication Date
- 2026-07-24
AI Technical Summary
Handheld concrete vibrators are heavy and difficult for users to operate for extended periods, which may have negative health effects. Furthermore, the protective hose may damage the compacted concrete surface.
Design a back-mounted device that guides a protective hose on the user's shoulder via a hose guide, allowing it to move in both longitudinal and horizontal directions, and is equipped with a housing and base plate to evenly distribute the load. The hose guide and extended rails are made of plastic to prevent slippage, and the battery pack receiving part is aligned with the housing.
It improves user safety and comfort, avoids damage to the concrete surface from the protective hose, ensures that the vibrator is inserted vertically into the concrete, distributes the load evenly, and reduces pressure on the back.
Smart Images
Figure CN117396656B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a backpack device having a shoulder strap unit and a battery pack receiver for receiving a battery pack designed to supply energy to a handheld concrete vibrator. The concrete vibrator preferably has a resiliently deformable protective hose. Background Technology
[0002] EP 3 605 784 A1 discloses a support device having a support frame and an energy storage device supported by the support frame.
[0003] DE 10 2004 001 550 A1 discloses an electric handheld power tool having at least one battery-powered electric motor that can be placed on the back of a user by means of a support unit and can drive the output tool via a flexible shaft by means of the electric motor, wherein the support unit has a guide device that acts on the flexible shaft such that the flexible shaft is fixed in the shoulder area starting from the user's back, so as not to slide. Summary of the Invention
[0004] The purpose of this invention is to specifically illustrate a back support device that promotes increased user safety and user comfort.
[0005] This objective is achieved by having a hose guide that allows the protective hose to be guided across the user's shoulder for load transfer.
[0006] This invention incorporates the following findings: Handheld concrete vibrators are typically very heavy and therefore difficult for users to operate. In the long run, this can have negative health effects on users. It has also been found that compacted concrete surfaces can be damaged by contact with the protective hose, necessitating corrective work.
[0007] These drawbacks are mitigated because the protective hose can be guided over the user's shoulder for load transfer. A portion of the vertical load of the concrete vibrator can be introduced into the back load via the protective hose, now guided in the hose guide. This protects the user's back. Furthermore, the hose guide facilitates the ideal vertical insertion of the vibrator's cylinder into the concrete to be compacted.
[0008] In a particularly preferred configuration, the hose guide is designed to allow the protective hose to still move along its longitudinal direction. It has been found advantageous that the hose guide is designed to allow the protective hose to still move along its horizontal direction, particularly at the contact point or in the contact area between the protective hose and the hose guide.
[0009] It has also been found advantageous that the carrying device has a housing separate from and / or arranged on the carrying strap unit. In a particularly preferred configuration, a hose guide is arranged on the housing. The housing may be in the form of a cover. It has also been found advantageous that the housing is aligned with the battery pack receiving portion.
[0010] In a particularly preferred configuration, the shoulder strap unit has two shoulder straps and / or a base plate. In another particularly preferred configuration, the base plate is fastened to the shoulder strap unit, particularly in a releasable manner. It has been found advantageous that the base plate is centered on the shoulder strap unit relative to the horizontal direction when the shoulder strap unit is in intended use. It has also been found advantageous that the hose guide is spaced a distance from the shoulder straps, particularly in the vertical direction. In another particularly preferred configuration, the load is transferred from the protective hose and / or hose guide to the user via the base plate.
[0011] In a particularly preferred configuration, the hose guide is integrated into the housing. It has been found advantageous that the hose guide is integrally formed with the housing. In a particularly preferred configuration, the housing and / or hose guide are made of or manifested as plastic. It has been found advantageous that the plastic is a thermoplastic, which has preferably been formed of the housing and / or hose guide by means of an injection molding process.
[0012] In another particularly preferred configuration, the hose guide has at least one sliding surface. It has been found advantageous that, according to DIN EN ISO 8295, the coefficient of sliding friction between the sliding surface rubber (protecting the hose) and the plastic (hose guide) in the dry state is between 0.2 and 0.4. The hose guide may be provided with a sliding surface comprising plastics selected from the group consisting of polyamides, polyacetal copolymers, polyethylene terephthalate, and polytetrafluoroethylene.
[0013] In a particularly preferred embodiment, the hose guide has a convex surface. The hose guide may have a surface that is at least partially curved. It has been found advantageous that this surface extends across a large portion of the width of the housing. This surface may be defined on both sides in the horizontal direction by corresponding raised collars. Therefore, lateral slippage of the hose from the hose guide can be prevented.
[0014] In another particularly preferred configuration, the hose guide has an extension track for partially receiving the protective hose. Load transfer from the protective hose preferably occurs via this extension track. In a particularly preferred configuration, the extension track has a U-shaped profile. It has been found advantageous that the extension track is arranged on the housing so that it can pivot and / or translate relative to the housing. The extension track can pivot relative to the housing in one or more degrees of freedom. It has been found advantageous that the extension track is configured to be lockable. In particular, it can be specified that one or more degrees of freedom of the extension track can be prevented by the user if needed. In a particularly preferred configuration, the housing has multiple defined receiving areas for the extension track. It has been found advantageous that the receiving areas have cutouts in which corresponding posts of the extension track can engage. Preferably, engagement occurs without significant or negligible gaps. The cutouts may have directional grooves formed on the cutouts, which preferably indicate that the cutouts have a non-rotationally symmetric configuration. In this way, specific pivot angle positions of the extension track can be set. Different cutouts may have directional grooves oriented at different angles.
[0015] In another particularly preferred configuration, the extension track has at least one conveying roller. It has been found advantageous that the conveying roller is arranged within a volume defined by the extension track. The extension track may have a length of at least 30 cm.
[0016] In another particularly preferred configuration, the battery pack receiving portion is arranged below the hose guide. It has been found advantageous that the hose guide protrudes at least partially beyond the highest point of the strap unit in the vertical direction.
[0017] This objective is also achieved by a concrete vibrator system having the aforementioned back-mounted device and a handheld concrete vibrator connected to, or capable of being connected to, the back-mounted device via a resiliently deformable protective hose, wherein the concrete vibrator is equipped with an electric motor. The concrete vibrator system can be developed based on the features described with respect to the back-mounted device.
[0018] In a particularly preferred configuration, the electric motor is arranged in the back-mounted device. In another particularly preferred configuration, the protective hose has a mechanical drive shaft driven by the electric motor. As an alternative to arranging the electric motor in the back-mounted device, the electric motor can be arranged in the vibrating cylinder of the concrete vibrator. It has been found advantageous that the protective hose comprises a cable or a power cable. In a particularly preferred configuration, the electric motor is connected to the battery pack via a cable.
[0019] In another particularly preferred configuration, the concrete vibrator system has a battery pack that is received or can be received in a battery pack receiving section, by means of which power can be supplied to the electric motor of the concrete vibrator.
[0020] Further advantages will become apparent from the following description of the accompanying drawings, which illustrate particularly preferred exemplary embodiments of the invention. The drawings and description contain numerous combinations of features. Those skilled in the art will also appropriately consider these features individually and combine them to form further useful combinations. Attached Figure Description
[0021] Identical and similar parts are indicated by the same reference numerals in the accompanying drawings, in which:
[0022] Figure 1 A first preferred exemplary embodiment of the back-mounted device is shown;
[0023] Figure 2 It shows from different perspectives Figure 1 Exemplary embodiments;
[0024] Figure 3 A second preferred exemplary embodiment of the back-mounted device is shown; and
[0025] Figure 4 It shows from different perspectives Figure 3 Exemplary embodiments are shown below. Detailed Implementation
[0026] Figure 1 A first preferred exemplary embodiment of the back support device 100 according to the present invention is shown.
[0027] The carrying device 100 is equipped with a shoulder strap unit 10 and a battery pack receiving section 20 for receiving the battery pack 80 (shown in dashed lines because the battery pack is arranged inside the battery pack receiving section 20). The battery pack 80 is received by the battery pack receiving section 20 for supplying energy to a handheld concrete vibrator 200, wherein the concrete vibrator 200 has a resiliently deformable protective hose 210.
[0028] The carrying unit 10 itself has two shoulder straps 11 and a base plate 15 connected to the shoulder straps. The battery pack receiving part 20 is connected to the base plate 15 so that the load of the battery pack 80 can be evenly distributed to the user HK of the carrying device 100 via the base plate 15 and the two shoulder straps 11. For example, the carrying unit 10 is equipped with a waist belt 13 to achieve better load distribution.
[0029] The back support 100, the handheld concrete vibrator 200, and the battery pack 80 are part of the concrete vibrator system 500. In the exemplary embodiment shown herein, the concrete vibrator 200 is equipped with an electric motor 230, which is arranged in the back support 100 (in this case, for example, below the battery pack receiving portion 20). The electric motor 230 is powered by the battery pack 80. A resiliently deformable protective hose 210 houses a flexible mechanical drive shaft 215, through which the rotational motion of the electric motor 230 is transmitted to the unbalanced mass (not shown here) of the vibrating cylinder 220 of the concrete vibrator 200.
[0030] In an alternative exemplary embodiment not shown herein, the electric motor may be arranged within the vibratory cylinder of the concrete vibrator. In this case, the protective hose includes a cable through which the electric motor is connected to the battery pack.
[0031] As from Figure 1 As can be seen, the carrying device 100 has a hose guide 30, by means of which the protective hose 210 is guided on the shoulder of the user HK of the carrying device 100 for load transfer effect. In this case, the hose guide 30 is designed to allow the protective hose 210 to still move along its longitudinal direction L.
[0032] The carrying device 100 has a housing 40, which is separate from and arranged on the shoulder strap unit 10, wherein a hose guide 30 is arranged on the housing 40. In the first preferred exemplary embodiment shown herein, the hose guide 30 is integrally formed with the housing 40. For example, the housing 40 is made of ABS plastic, which has been injection molded into the housing 40. The housing 40 is in the form of a cover, wherein the hose guide 30 integrally formed with the housing 40 has a convex surface OF. The convex surface OF follows the curvature of the shoulder strap 11, which conforms to the shoulder shape of the user HK when the carrying device 100 is used as intended. In other words, it can be advantageous when the convex surface OF mimics the shoulder and / or back of the user HK in its curved position and / or shape.
[0033] As from Figure 2As can be seen, the convex surface OF extends across most of the width B of the housing 40. In this case, the convex surface OF is defined on both sides in the horizontal direction HR by corresponding raised collars 39. Therefore, the protective hose 210 is prevented from sliding laterally from the hose guide 30. The surface OF is configured in this way so that the protective hose 210 can still move along its longitudinal direction L; in other words, due to gravity, the protective hose rests on the surface OF of the hose guide 30 and can slide along this surface. In particular, the protective hose 210 is not fixed to the hose guide 30 in the contact area between the protective hose 210 and the hose guide 30. Therefore, at least to some extent, vibrations from the protective hose 210 are prevented from being introduced into the back-mounted device 100.
[0034] Because the convex surface OF extends across most of the width B of the housing 40, the protective hose 210 also has a degree of freedom in the horizontal direction HR. Therefore, the user can also move the protective hose 210 slightly, for example, when transferring the protective hose 210 to the left shoulder.
[0035] The carrying device 100 has a handle 17 that is fastened to the base plate 15, and the carrying device 100 can be comfortably lifted, for example, onto the loading box of a vehicle.
[0036] Figure 3 A second preferred exemplary embodiment of the carrying device 100 according to the present invention is shown. The carrying device 100 has a housing 40 which is separate from and fastened to a base plate 15 of the carrying unit 10, wherein a hose guide 30 is arranged on the housing 40. In order to guide the protective hose 210 with the effect of load transfer, the hose guide 30 has an extension track 31.
[0037] The extension rail 31 is releasably secured to the housing 40. To prevent the protective hose 210 (in the horizontal direction HR) from sliding laterally from the housing 40, the housing 40 has two retaining posts 41. Because the extension rail 31 has a U-shaped profile, the protective hose 210 is at least partially received within this profile, thus preventing the protective hose 210 (in the horizontal direction HR) from sliding laterally from the extension rail 31.
[0038] Preferably, the extension track 31 is arranged on the housing 40 so that it can be translated relative to the housing 40. This is intended to reference Figure 4To explain in more detail. The housing 40 has a plurality of defined receiving areas 33 for the extension track 31. Each of the receiving areas 33 has a cutout 34 into which a corresponding post (not shown) of the extension track 31 can engage with little or no gap. The extension track 31 is secured, for example, by a retaining pin (not shown) on its underside to prevent slippage, which locks in a pin receiving portion 35 arranged at the center of the receiving area 33. Each of the receiving areas 33 defines an anchoring position for the extension track 31 along the width B of the housing 40. Thus, the extension track 31 is arranged on the housing 40 so that it can be translated relative to the housing 40.
[0039] Positioning the extension track 31 at a defined pivot position (in each case, relative to a pivot axis SA extending coaxially with the pin receiving portion) can be achieved, for example, through a circular cutout 34 in the receiving region 33. In this case, the extension track 31 remains within the same cutout 34 and can pivot variably about the pivot axis SA of the adopted cutout 34 in a manner similar to a slewing lifting arm. Alternatively, a specific pivot angle position of the extension track 31 can be set by an directional groove 36 formed on the cutout 34, the directional groove 36 indicating that the cutout 34 has a non-rotationally symmetric configuration. The cutout 34 may have directional grooves oriented at different angles.
[0040] As can be seen from Figure 4 As can be seen, the extension track 31 has a U-shaped profile, protecting the hose 210 (see...). Figure 3 The protective hose 210 is at least partially contained within the profile. The extension track 31 has two conveying rollers 37 that facilitate the guidance of the protective hose 210 in the longitudinal direction L.
[0041] List of reference numerals
[0042] 10 shoulder strap units
[0043] 11 shoulder straps
[0044] 13 belts
[0045] 15 substrates
[0046] 17-handle
[0047] 20 Battery Pack Receiving Section
[0048] 30 Hose Guide
[0049] 31 Extended Track
[0050] 33 Acceptance Area
[0051] 34 incisions
[0052] 35 Sales Receiving Department
[0053] 36 directional grooves
[0054] 37 conveyor rollers
[0055] 39 raised collar
[0056] 40 housing
[0057] 41 Limiting Column
[0058] 80 battery pack
[0059] 100 Back Loading Device
[0060] 200 concrete vibrator
[0061] 210 Protective Hose
[0062] 220 Vibration Cylinder
[0063] 215 drive shaft
[0064] 230 electric motor
[0065] 500 Concrete Vibrator System
[0066] B-shell width
[0067] HK users
[0068] HR horizontal direction
[0069] L longitudinal direction
[0070] OF surface
[0071] SA pivot axis
Claims
1. A carrying device (100) having a shoulder strap unit (10) and a battery pack receiving section (20) for receiving a battery pack (80) for supplying energy to a handheld concrete vibrator (200), wherein, The handheld concrete vibrator (200) has a resiliently deformable protective hose (210). The back-mounted device (100) is characterized by having a hose guide (30) by means of which the protective hose (210) can be guided on the shoulder of the user (HK) of the back-mounted device (100) for load transfer effect. The back-mounted device (100) has a housing (40) which is separate from and / or arranged on the shoulder strap unit (10). The hose guide (30) is arranged on the housing (40) and has an extension rail (31) arranged on the housing (40) so as to be able to pivot and / or translate relative to the housing (40).
2. The back-mounted device (100) as described in claim 1. Its features are, The hose guide (30) is designed to allow the protective hose (210) to still move along the longitudinal direction (L) of the protective hose.
3. The back-mounted device (100) as described in claim 1 or 2. Its features are, The hose guide (30) is integrated into the housing (40).
4. The back-mounted device (100) as described in claim 3. Its features are, The hose guide (30) is integrally formed with the housing (40).
5. The back-mounted device (100) as described in claim 3. Its features are, The hose guide (30) has a convex surface (OF).
6. The back-mounted device (100) as described in claim 5. Its features are, The convex surface extends across most of the width (B) of the housing (40).
7. The back-mounted device (100) as described in claim 5. Its features are, The convex surface (OF) is defined on both sides in the horizontal direction (HR) by corresponding raised collars (39).
8. The back-mounted device (100) as described in claim 1 or 2. Its features are, The housing (40) has multiple defined receiving areas (33) for the extended track (31).
9. The back-mounted device (100) as described in claim 8. Its features are, The extended track (31) has at least one conveying roller (37).
10. The back-mounted device (100) as described in claim 1 or 2. Its features are, The battery pack receiving part (20) is located below the hose guide (30).
11. A concrete vibrator system (500) having a back-mounted device (100) as described in any one of claims 1 to 10, and having a handheld concrete vibrator (200) connected to or capable of being connected to the back-mounted device (100) via a resiliently deformable protective hose (210), wherein, The handheld concrete vibrator (200) is equipped with an electric motor (230).
12. The concrete vibrator system (500) as described in claim 11. Its features are, The electric motor (230) is arranged in the back support device (100) and / or the protective hose (210) has a mechanical drive shaft (215) driven by the electric motor (230).
13. The concrete vibrator system (500) as described in claim 11. Its features are, The electric motor (230) is disposed in the vibrating cylinder (220) of the handheld concrete vibrator (200), and the protective hose (210) includes a cable through which the electric motor (230) is connected to the battery pack (80).
14. The concrete vibrator system (500) as described in any one of claims 11 to 13. Its features are, The concrete vibrator system (500) has a battery pack (80) which is housed in or can be housed in the battery pack receiving part (20) and by means of the battery pack, power can be supplied to the electric motor (230) of the handheld concrete vibrator (200).