Return mechanism for long slide rail drag chain

Abstract

The utility model belongs to the technical field of sliding rails, and relates to a return mechanism for a long sliding rail drag chain, which comprises a drag chain box, and a box body upper cover is arranged at the open end of the drag chain box in a sealing and covering manner to form a drag chain storage space; one end of the drag chain is fixed with the drag chain box, and the other end is fixed with the upper rail; the drag chain return assembly is arranged in the drag chain box and can move in the length direction of the drag chain box in a guiding mode. The drag chain box rack is fixed to a bottom plate of an inner cavity of the drag chain box, a transmission gear of the drag chain return assembly is meshed with the drag chain box rack, and the transmission gear can drive a constant-force vortex spring of the drag chain return assembly to rotate forwards and backwards in the rotating process; in the working process, when the drag chain is pulled out of the drag chain box, the drag chain return assembly provides resistance for the drag chain so that the drag chain can be stretched straight, and when the drag chain is stored towards the interior of the drag chain box, the drag chain return assembly exerts thrust on the drag chain. The drag chain restoring mechanism is stable in performance, can provide restoring force and is constant in force value, and the size and the weight of the drag chain box can be greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of packaging machinery and equipment, and relates to a return mechanism for long slide rail drag chains. Background Technology

[0002] Currently, to meet the needs of comfortable family travel, MPV models are becoming increasingly common, and the application of electric long sliding rails is also growing. Due to the long travel of the long sliding rails and the increased seat functions, the layout of the wiring harness is particularly important. Currently, cable chains are mostly used. The cable chain is hidden inside the sliding rail. When the seat is moved back, the cable chain retracts into the cable chain box located next to the sliding rail. During the process of the seat moving back, a backward thrust is applied to the end of the cable chain, pushing the cable chain back into the cable chain box. During the push-back process, because the cable chain box adopts a winding structure, the resistance during the winding process of the cable chain will be very large. In extreme cases, part of the cable chain will be damaged, causing the cable chain to detach, thus causing the entire cable chain to fail and the wiring harness to break.

[0003] To address the damage caused by cable chains during the push-back process, a cable chain return mechanism needs to be installed inside the cable chain box. This mechanism applies a certain force to the moving end of the cable chain to balance internal resistance, thereby resolving the damage issue. Currently, most technical solutions use tension springs or other tension-return mechanisms. These arrangements occupy a large amount of space in the cable chain box, and the entire force application process is unstable, failing to completely eliminate the risk of cable chain damage. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a recovery mechanism for long slide rail cable chains. This cable chain recovery mechanism has stable performance, can provide its own recovery force with a constant force value, and can greatly reduce the volume and weight of the cable chain box.

[0005] According to the technical solution of this utility model: a return mechanism for long slide rail cable chains, characterized in that: it includes a cable chain box, and the opening end of the cable chain box is sealed with a box cover to form a cable chain storage space;

[0006] One end of the cable chain is fixed to the cable chain box, and the other end is fixed to the upper rail;

[0007] A cable chain return component is installed inside the cable chain box and can be guided and moved along the length of the cable chain box;

[0008] The cable chain box rack is fixed to the bottom plate of the inner cavity of the cable chain box. The drive gear of the cable chain return assembly meshes with the cable chain box rack. During the rotation of the drive gear, it will drive the constant force spiral spring of the cable chain return assembly to rotate in both directions. When the cable chain is pulled out of the cable chain box during operation, the cable chain return assembly provides resistance to the cable chain, making the cable chain taut. When the cable chain is retracted into the cable chain box, the cable chain return assembly applies a thrust to the cable chain.

[0009] As a further improvement of this utility model, the bottom plate of the cable chain box is provided with a cable chain box slide groove, the transmission gear boss at the lower end of the cable chain return component is fitted in the cable chain box slide groove, and the upper cover boss at the upper end of the cable chain return component is fitted in the upper cover slide groove of the box body cover.

[0010] As a further improvement of this utility model, two upper cover protrusions are provided on the upper cover of the box body, and the center line connecting the two upper cover protrusions passes through the center of the top surface of the upper cover of the box body.

[0011] As a further improvement of this utility model, the drag chain return assembly includes an upper cover housing, a constant force spiral spring is disposed inside the upper cover housing, and the claw of the outer ring of the constant force spiral spring is engaged with the spiral spring limiting notch provided on the side wall of the upper cover housing.

[0012] The transmission gear is located at the bottom of the upper cover housing, and the gear shaft integrally connected to the upper end face of the transmission gear is interference-fitted with the inner hole of the constant force vortex spring. A pin hole is provided at the top of the upper cover housing.

[0013] As a further improvement of this utility model, the bottom surface of the top plate of the upper cover shell is provided with an integrally connected positioning post, which is used for rotational positioning of the upper end hole of the gear shaft of the transmission gear.

[0014] The technical advantages of this utility model are as follows: the product structure is simple, reasonable and ingenious. The device has a simple structure, stable performance and small size. It can provide its own restoring force and the force value is constant, which can greatly reduce the volume and weight of the cable box. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the box body after the top cover of this utility model is opened.

[0017] Figure 3 This is an exploded view of the drag chain recovery component.

[0018] Figure 4 This is a schematic diagram showing the fit between the transmission gear and the upper cover housing.

[0019] Figure 5 This is an assembly diagram of the drag chain recovery component. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] Figure 1-5 The components include a cable chain 1, a cable chain box 2, a cable chain box slide 2-1, a cable chain box rack 2-2, a cable chain return assembly 3, a top cover shell 3-1, a top cover boss 3-1-1, a positioning post 3-1-2, a constant force coil spring 3-2, a transmission gear 3-3, a transmission gear boss 3-3-1, a gear shaft 3-3-2, a guide plate 4, a box body top cover 5, and a top cover slide 5-1, etc.

[0023] like Figure 1-5 As shown, this utility model is a return mechanism for long slide rail cable chains, including a cable chain box 2, and a box cover 5 is provided to seal the open end of the cable chain box 2 to form a storage space for the cable chain 1.

[0024] One end of the cable chain 1 is fixed to the cable chain box 2, and the other end is fixed to the upper rail.

[0025] The cable chain return component 3 is located inside the cable chain box 2 and can be guided and moved along the length of the cable chain box 2.

[0026] The cable chain box rack 2-2 is fixed to the bottom plate of the inner cavity of the cable chain box 2. The transmission gear 3-3 of the cable chain return assembly 3 meshes with the cable chain box rack 2-2. During the rotation of the transmission gear 3-3, it will drive the constant force spiral spring 3-2 of the cable chain return assembly 3 to rotate in both directions. When the cable chain 1 is pulled out of the cable chain box 2, the cable chain return assembly 3 provides resistance to the cable chain 1, so that the cable chain 1 is taut. When the cable chain 1 is retracted into the cable chain box 2, the cable chain return assembly 3 applies a pushing force to the cable chain 1.

[0027] Specifically, the guiding and moving scheme of the cable chain return component 3 is as follows: the bottom plate of the cable chain box 2 is provided with a cable chain box slide groove 2-1, the transmission gear boss 3-3-1 at the lower end of the cable chain return component 3 is fitted in the cable chain box slide groove 2-1, and the upper cover boss 3-1-1 at the upper end of the cable chain return component 3 is fitted in the upper cover slide groove 5-1 of the box body upper cover 5.

[0028] Two upper cover protrusions 3-1-1 are provided on the upper cover 5 of the box body, and the center line connecting the two upper cover protrusions 3-1-1 passes through the center of the top surface of the upper cover 5 of the box body. The two upper cover protrusions 3-1-1 are set in the upper cover slide groove 5-1, which can prevent the drag chain return assembly 3 from rotating.

[0029] The cable chain return assembly 3 includes an upper cover housing 3-1, and a constant force spiral spring 3-2 disposed inside the upper cover housing 3-1. The hook 3-2-1 of the outer ring of the constant force spiral spring 3-2 engages with the spiral spring limiting notch 3-1-3 provided on the side wall of the upper cover housing 3-1. The spiral spring limiting notch 3-1-3 includes a guide groove formed on the side wall of the upper cover housing 3-1 and extending vertically. A positioning step is provided in the guide groove, and the hook 3-2-1 is supported on the positioning step.

[0030] The transmission gear 3-3 is fitted at the bottom of the upper cover housing 3-1, and the gear shaft 3-3-2 integrally connected to the upper end face of the transmission gear 3-3 is interference-fitted with the inner hole of the constant force spiral spring 3-2. A pin hole is provided at the top of the upper cover housing 3-1. The pin hole is located between the two upper cover bosses 3-1-1.

[0031] The top plate of the upper cover housing 3-1 has an integrally connected positioning post 3-1-2, which is used for rotational positioning of the upper end hole of the gear shaft 3-3-2 of the transmission gear 3-3. The lower end of the positioning post 3-1-2 is constructed with a rounded transition shape to facilitate engagement with the rounded groove at the top of the gear shaft 3-3-2.

[0032] like Figure 1-5 As shown, during operation, one end of the cable chain 1 is fixedly connected to the cable chain box 2, and the other end is fixed to the external upper rail. The upper cover boss 3-1-1 slides within the upper cover groove 5-1, and the transmission gear boss 3-3-1 slides within the cable chain box groove 2-1. The transmission gear 3-3 meshes with the cable chain box rack 2-2. When the cable chain return assembly 3 slides backward (to the closed end of the cable chain box 2), the transmission gear 3-3 drives the constant force coil spring 3-2 to reverse. That is, when the upper rail slides backward, it will drive the cable chain 1 to slide backward. The number of cable chains 1 in the cable chain box 2 increases and moves in the opposite direction to the upper rail. During this process, the cable chain return assembly 3 provides a thrust to the cable chain 1, keeping the cable chain 1 taut and the force constant.

[0033] When the cable chain return assembly 3 slides forward, the constant force spiral spring 3-2 provides forward thrust through the transmission gear 3-3. That is, when the upper rail slides forward, it will drive the cable chain 1 to slide forward. The cable chain 1 in the cable chain box 2 decreases and moves in the opposite direction to the upper rail. During this process, the cable chain return assembly 3 provides resistance to the movement of the cable chain 1. During this process, the force value is constant and the cable chain 1 is always taut.

[0034] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A return mechanism for a long slide rail cable chain, characterized in that: Includes a cable chain box (2), and the opening end of the cable chain box (2) is sealed with a box body cover (5) to form a storage space for the cable chain (1); One end of the cable chain (1) is fixed to the cable chain box (2), and the other end is fixed to the upper rail; The cable chain return component (3) is located inside the cable chain box (2) and can be guided to move along the length of the cable chain box (2); The cable chain box rack (2-2) is fixed to the bottom plate of the inner cavity of the cable chain box (2). The transmission gear (3-3) of the cable chain return assembly (3) meshes with the cable chain box rack (2-2). During the rotation of the transmission gear (3-3), it will drive the constant force spiral spring (3-2) of the cable chain return assembly (3) to rotate in both directions. When the cable chain (1) is pulled out of the cable chain box (2) during operation, the cable chain return assembly (3) provides resistance to the cable chain (1), making the cable chain (1) taut. When the cable chain (1) is retracted into the cable chain box (2), the cable chain return assembly (3) applies a thrust to the cable chain (1).

2. The return mechanism for long slide rail cable chains as described in claim 1, characterized in that: The bottom plate of the cable chain box (2) has a cable chain box groove (2-1). The transmission gear boss (3-3-1) at the lower end of the cable chain return component (3) is fitted in the cable chain box groove (2-1). The upper cover boss (3-1-1) at the upper end of the cable chain return component (3) is fitted in the upper cover groove (5-1) of the box body cover (5).

3. The return mechanism for long slide rail cable chains as described in claim 2, characterized in that: The box body cover (5) is provided with two cover protrusions (3-1-1), and the center line connecting the two cover protrusions (3-1-1) passes through the center of the top surface of the box body cover (5).

4. The return mechanism for long slide rail cable chains as described in claim 1, characterized in that: The drag chain recovery assembly (3) includes an upper cover housing (3-1), a constant force spiral spring (3-2) is disposed inside the upper cover housing (3-1), and the hook (3-2-1) of the outer ring of the constant force spiral spring (3-2) is engaged with the spiral spring limiting notch (3-1-3) provided on the side wall of the upper cover housing (3-1); The transmission gear (3-3) is fitted at the bottom of the upper cover housing (3-1), and the gear shaft (3-3-2) integrally connected to the upper end face of the transmission gear (3-3) is interference-fitted with the inner hole of the constant force vortex spring (3-2). The top of the upper cover housing (3-1) is provided with a pin hole.

5. The return mechanism for long slide rail cable chains as described in claim 4, characterized in that: The top plate of the upper cover housing (3-1) is provided with an integrally connected positioning post (3-1-2), which is used for rotational positioning of the upper end hole of the gear shaft (3-3-2) of the transmission gear (3-3).

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