Baby carriage rear support rod damping structure

Abstract

A kind of baby carriage rear support rod shock absorbing structure, shaft lower end is fixedly connected on lower connecting rod, upper connecting rod is equipped with sliding slot in, shaft upper end is slidably connected in sliding slot, upper sleeve upper part is fixedly sleeved on the outer periphery of upper connecting rod, first elastic return element is equipped in upper sleeve, adjusting tube is sleeved on the outer periphery of shaft, lower sleeve is located below adjusting tube, second elastic return element is equipped in lower sleeve, limiting sleeve is equipped with polygonal inner hole, is sleeved on the outer periphery of shaft, limiting block is protruded on the outer periphery of shaft.When the first state of adjusting tube, limiting block can be slid to the inner hole of limiting sleeve, second elastic return element is compressed when upper connecting rod is pressed, when adjusting tube is rotated to the second state, limiting block is interfered and cannot be slid to the inner hole of limiting sleeve, first elastic return element and second elastic return element are compressed when upper connecting rod is pressed.It can be realized that baby carriage rear support rod shock absorbing is adjusted in two soft and hard grades by rotating adjusting tube, and different needs are satisfied.

Description

Technical Field

[0001] This utility model relates to the field of stroller technology, and in particular to a shock-absorbing structure for the rear support rod of a stroller. Background Technology

[0002] When choosing a stroller, consumers prioritize shock absorption performance. Currently, most strollers use frame-based shock absorption, which involves installing shock-absorbing springs in the rear support rod. However, because the spring force is fixed, the shock absorption stiffness cannot be adjusted. Since different riders and different road conditions have different needs for shock absorption stiffness, there is a need for stroller rear support rod shock absorption structures with adjustable stiffness. Utility Model Content

[0003] This invention provides an adjustable shock-absorbing structure for the rear support rod of a stroller to address the above problems.

[0004] The technical solution used by this utility model to solve the above problems is: a shock-absorbing structure for the rear support rod of a stroller, comprising:

[0005] A shaft, the lower end of which is fixedly connected to a lower connecting rod;

[0006] An upper connecting rod is provided with a first sliding groove, and the upper end of the shaft is slidably connected in the first sliding groove.

[0007] The upper sleeve is fixedly sleeved on the outer periphery of the upper connecting rod, and a first elastic reset member is provided inside the upper sleeve;

[0008] An adjusting tube is sleeved on the outer circumference of the shaft and located below the upper sleeve. The adjusting tube can rotate around the circumference of the shaft.

[0009] The lower sleeve is located below the adjusting tube. The lower part of the lower sleeve is sleeved on the outer periphery of the lower connecting rod and slides up and down along the lower connecting rod. A second elastic reset element is provided inside the lower sleeve.

[0010] A limiting sleeve is located inside the adjusting tube and slides axially with the adjusting tube in a circumferential limiting manner. The limiting sleeve has a polygonal inner hole and is sleeved on the outer circumference of the shaft.

[0011] A limiting block protrudes from the outer periphery of the shaft, and the limiting block is located inside the adjusting tube and above the lower sleeve;

[0012] When the regulating tube is in the first state, the limiting block can slide to the inner hole of the limiting sleeve. When the upper connecting rod is pressed down, the second elastic reset member is compressed. When the regulating tube is rotated to the second state, the limiting block is interfered with and cannot slide to the inner hole of the limiting sleeve. When the upper connecting rod is pressed down, both the first elastic reset member and the second elastic reset member are compressed.

[0013] This utility model's stroller rear support rod shock absorption structure features two sets of elastic reset members. The fit between the limiting block and the limiting sleeve can be adjusted by rotating the adjusting tube. With this structure, in the first state of the adjusting tube, the limiting block can slide into the inner hole of the limiting sleeve. After the upper connecting rod is compressed, it sequentially drives the upper sleeve, adjusting tube, and lower sleeve downwards, causing the limiting sleeve to slide relative to the shaft. The second elastic reset member is not compressed. After the lower sleeve descends, the second elastic reset member is compressed. In the second state of the adjusting tube, after the upper connecting rod is compressed, the downward movement of the limiting sleeve is hindered by the limiting block, compressing the first elastic reset member. As the upper connecting rod continues to be pressed down, the second elastic reset member is compressed. When both sets of elastic reset members are compressed, the stroller rear support rod shock absorption is softer. Compared with existing technologies, the advantage lies in the ability to adjust the shock absorption of the stroller rear support rod to two levels (soft and hard) by rotating the adjusting tube, meeting different needs and making the product more versatile.

[0014] Preferably, the assembly also includes a rivet, and the upper end of the shaft has a second sliding groove extending along its length. The rivet passes through the upper sleeve, the upper connecting rod, and the second sliding groove, and is slidably connected along the length of the second sliding groove. With this configuration, the cooperation between the rivet and the second sliding groove limits the upward and downward movement of the shaft.

[0015] Preferably, the cross-sectional shape of the limiting block is the same as the cross-sectional shape of the inner hole of the limiting sleeve, and the cross-sectional size of the limiting block is smaller than the cross-sectional size of the inner hole of the limiting sleeve.

[0016] Preferably, the cross-sectional shape of the limiting block and the cross-sectional shape of the inner hole of the limiting sleeve are equilateral triangles.

[0017] Preferably, the inner wall of the regulating tube is provided with an axially extending guide groove, and the outer periphery of the limiting sleeve is provided with a guide rib, which is slidably connected in the guide groove.

[0018] Preferably, a spacer block is also included. The spacer block comprises an upper block and a lower block, the outer diameter of the upper block being larger than that of the lower block, with a stepped transition. The spacer block is sleeved on the shaft, and a first elastic reset member abuts between the upper connecting rod and the upper block. When the first elastic reset member is in its free state, the upper block is located inside the upper sleeve, and the lower block is located inside the adjusting tube. The spacer block ensures that the rotation of the adjusting tube does not affect the first elastic reset member.

[0019] Preferably, the lower end face of the regulating tube is provided with a limiting protrusion, and the stepped surface and the upper end face of the lower sleeve are provided with a limiting groove that cooperates with the limiting protrusion. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the shock-absorbing structure of the rear support rod of the stroller according to this utility model.

[0021] Figure 2This is an exploded view of the shock-absorbing structure of the rear support rod of the stroller according to this utility model.

[0022] Figure 3 This is a cross-sectional view of the shock-absorbing structure of the rear support rod of the stroller according to this utility model.

[0023] Figure 4 This is a schematic diagram of the upper connecting rod under pressure when the adjusting tube of the shock-absorbing structure of the rear support rod of the stroller is in its first state.

[0024] Figure 5 This is a schematic diagram of the upper connecting rod under pressure when the adjusting tube of the shock-absorbing structure of the rear support rod of the stroller is in its second state.

[0025] As shown in the figure:

[0026] 1. Lower connecting rod;

[0027] 2. Shaft, 20. Second slide groove, 21. Limiting block, 22. Rivet;

[0028] 3. Upper connecting rod, 30. First sliding groove;

[0029] 4. Install the sleeve;

[0030] 51. First elastic reset component; 52. Second elastic reset component;

[0031] 6. Adjusting tube; 61. Guide groove; 601. Limiting groove; 602. Limiting protrusion;

[0032] 7. Install the sleeve;

[0033] 8. Limiting sleeve; 81. Guide rib;

[0034] 9. Guide ribs; 91. Upper block; 92. Lower block; 90. Step surface. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] like Figures 1 to 5As shown, a shock-absorbing structure for a stroller's rear support rod includes a lower connecting rod 1, an axle 2, an upper connecting rod 3, an upper sleeve 4, an adjusting tube 6, a lower sleeve 7, and a limiting sleeve 8. The lower connecting rod 1 is connected to the stroller chassis or wheels, and the upper connecting rod 3 is connected to the stroller frame body. The lower end of shaft 2 is fixedly connected to the lower connecting rod 1; the upper connecting rod 3 has a first sliding groove 30, and the upper end of shaft 2 is slidably connected in the first sliding groove 30; the upper part of the upper sleeve 4 is fixedly sleeved on the outer circumference of the upper connecting rod 3, and the upper sleeve 4 has a first elastic reset member 51; the adjusting tube 6 is sleeved on the outer circumference of shaft 2, located below the upper sleeve 4, and the adjusting tube 6 can rotate around shaft 2; the lower sleeve 7 is located below the adjusting tube 6, and the lower part of the lower sleeve 7 is sleeved on the outer circumference of the lower connecting rod 1 and slides up and down along the lower connecting rod 1, and the lower sleeve 7 has a second elastic reset member 52; the limiting sleeve 8 is located inside the adjusting tube 6 and is circumferentially limited and axially slidingly fitted with the adjusting tube 6, and the limiting sleeve 8 has a polygonal inner hole and is sleeved on the outer circumference of shaft 2. A limiting block 21 protrudes from the outer circumference of shaft 2, and the limiting block 21 is located inside the adjusting tube 6 and above the lower sleeve 7, and the limiting block 21 abuts against the upper end face of the lower sleeve 7 to restrict the lower sleeve 7 from sliding upward.

[0037] In the first state of the adjusting tube 6, the limiting block 21 can slide into the inner hole of the limiting sleeve 8. When the upper connecting rod 3 is pressed down, the second elastic reset member 52 is compressed. When the adjusting tube 6 rotates to the second state, the limiting block 21 is interfered with and cannot slide into the inner hole of the limiting sleeve 8. When the upper connecting rod 3 is pressed down, both the first elastic reset member 51 and the second elastic reset member 52 are compressed. Both the first elastic reset member 51 and the second elastic reset member 52 are springs.

[0038] It also includes rivets 22. The upper end of the shaft 2 is provided with a second sliding groove 20 extending along its length. The upper sleeve 4 and the upper connecting rod 3 are provided with shaft holes. The rivets 22 pass through the upper sleeve 4, the upper connecting rod 3 and the second sliding groove 20. The rivets 22 are fixedly connected to the upper sleeve 4 and the upper connecting rod 3, and can slide within the second sliding groove 20 along the length of the second sliding groove 20. The two ends of the second sliding groove 20 limit the upward and downward movement of the shaft 2.

[0039] The cross-sectional shape of the limiting block 21 is the same as the cross-sectional shape of the inner hole of the limiting sleeve 8, and the cross-sectional size of the limiting block 21 is smaller than the cross-sectional size of the inner hole of the limiting sleeve 8.

[0040] The cross-sectional shape of the limiting block 21 and the cross-sectional shape of the inner hole of the limiting sleeve 8 are equilateral triangles. In the first state of the adjusting tube 6, the triangle containing the limiting block 21 corresponds to the triangle containing the inner hole of the limiting sleeve 8, and the limiting block 21 can slide into the inner hole of the limiting sleeve 8. After the adjusting tube 6 rotates 180°, the triangle containing the limiting block 21 intersects with the triangle containing the inner hole of the limiting sleeve 8, and the limiting block 21 cannot slide into the inner hole of the limiting sleeve 8. The cross-sectional shapes of the limiting block 21 and the inner hole of the limiting sleeve 8 can also be pentagonal, hexagonal, or other shapes.

[0041] The inner wall of the regulating tube 6 is provided with an axially extending guide groove 61, and the outer periphery of the limiting sleeve 8 is provided with a guide rib 81, which is slidably connected in the guide groove 61. The guide rib 81 also provides a circumferential limiting effect between the regulating tube 6 and the limiting sleeve 8. When the regulating tube 6 rotates, the limiting sleeve 8 rotates synchronously with the cooperation of the guide rib 81.

[0042] It also includes a pad 9, which includes an upper block 91 and a lower block 92. The outer diameter of the upper block 91 is larger than the outer diameter of the lower block 92, and they are connected by a stepped surface 90. The pad 9 is sleeved on the shaft 2. The first elastic reset member 51 abuts between the upper connecting rod 3 and the upper block 91. When the first elastic reset member 51 is in a free state, the upper block 91 is located inside the upper sleeve 4, and the lower block 92 is located inside the adjusting tube 6. The lower end of the lower block 92 is in contact with the limiting sleeve 8.

[0043] The lower end face of the regulating tube 6 is provided with a limiting groove 602, and the stepped surface 90 is in close contact with the upper end face of the regulating tube 6. The stepped surface 90 and the upper end face of the lower sleeve 7 are provided with limiting protrusions 601 that cooperate with the limiting grooves 602. There are two limiting grooves 602, which are symmetrically arranged with the axis of the regulating tube 6 as the center.

[0044] This utility model's stroller rear support rod shock absorption structure is equipped with two sets of elastic reset components. The engagement between the limiting block 21 and the limiting sleeve 8 is adjusted by rotating the adjusting tube 6. In the first state of the adjusting tube 6, as... Figure 4 As shown, the limiting block 21 can slide into the inner hole of the limiting sleeve 8. When the upper connecting rod 3 is pressed, it sequentially drives the upper sleeve 4, adjusting tube 6, and lower sleeve 7 downwards. The limiting sleeve 8 can slide relative to the shaft 2. The limiting sleeve 8 moves downwards with the upper connecting rod 3 under pressure. At this time, the first elastic reset member 51 will not be compressed. After the lower sleeve 7 moves downwards, the second elastic reset member 52 is compressed. When the adjusting tube 6 is in the second state after rotating 180°, as... Figure 5 As shown, when the upper connecting rod 3 is compressed, the limiting sleeve 8 is blocked from descending by the limiting block 21 and cannot continue to descend. However, the upper connecting rod 3, upper sleeve 4, adjusting tube 6, and lower sleeve 7 continue to descend. Therefore, the first elastic reset member 51 is compressed, and the second elastic reset member 52 is also compressed. When both sets of elastic reset members are compressed, the shock absorption of the stroller rear support rod is softer. The shock absorption structure of the stroller rear support rod of this utility model can realize two levels of adjustment of the shock absorption of the stroller rear support rod through the adjusting tube 6, so as to meet different needs and make the product more widely applicable.

Claims

1. A shock absorbing structure for a rear support rod of a baby carriage, characterized by: include: Shaft (2), the lower end of which is fixedly connected to the lower connecting rod (1); The upper connecting rod (3) is provided with a first sliding groove (30), and the upper end of the shaft (2) is slidably connected in the first sliding groove (30); Upper sleeve (4), the upper part of which is fixedly sleeved on the outer periphery of the upper connecting rod (3), and the upper sleeve (4) is provided with a first elastic reset member (51). The adjusting tube (6) is sleeved on the outer circumference of the shaft (2) and located below the upper sleeve (4). The adjusting tube (6) can rotate around the shaft (2). The lower sleeve (7) is located below the adjusting tube (6). The lower part of the lower sleeve (7) is sleeved on the outer periphery of the lower connecting rod (1) and slides up and down along the lower connecting rod (1). The lower sleeve (7) is provided with a second elastic reset member (52). The limiting sleeve (8) is located inside the adjusting tube (6) and is circumferentially limited and axially slidingly fitted with the adjusting tube (6). The limiting sleeve (8) has a polygonal inner hole and is sleeved on the outer periphery of the shaft (2). The limiting block (21) protrudes from the outer periphery of the shaft (2) and is located inside the adjusting tube (6) and above the lower sleeve (7); When the regulating tube (6) is in the first state, the limiting block (21) can slide to the inner hole of the limiting sleeve (8). When the upper connecting rod (3) is pressed down, the second elastic reset member (52) is compressed. When the regulating tube (6) is rotated to the second state, the limiting block (21) is interfered with and cannot slide to the inner hole of the limiting sleeve (8). When the upper connecting rod (3) is pressed down, both the first elastic reset member (51) and the second elastic reset member (52) are compressed.

2. The rear support pole shock absorbing structure of claim 1, wherein: It also includes rivets (22), and the upper end of the shaft (2) is provided with a second groove (20) extending along its length direction. The rivets (22) pass through the upper sleeve (4), the upper connecting rod (3) and the second groove (20) and are slidably connected along the length direction of the second groove (20).

3. The rear support pole shock absorbing structure of claim 1, wherein: The cross-sectional shape of the limiting block (21) is the same as the cross-sectional shape of the inner hole of the limiting sleeve (8), and the cross-sectional size of the limiting block (21) is smaller than the cross-sectional size of the inner hole of the limiting sleeve (8).

4. The rear support pole shock absorbing structure of claim 3, wherein: The cross-sectional shape of the limiting block (21) and the cross-sectional shape of the inner hole of the limiting sleeve (8) are equilateral triangles.

5. The rear support pole shock absorbing structure of claim 1, wherein: The inner wall of the regulating tube (6) is provided with an axially extending guide groove (61), and the outer periphery of the limiting sleeve (8) is provided with a guide rib (81), which is slidably connected in the guide groove (61).

6. The rear support pole shock absorbing structure of claim 1, wherein: It also includes a pad (9), which includes an upper block (91) and a lower block (92). The outer diameter of the upper block (91) is larger than that of the lower block (92), and they are connected by a step surface (90). The pad (9) is sleeved on the shaft (2). The first elastic reset member (51) abuts between the upper connecting rod (3) and the upper block (91). When the first elastic reset member (51) is in a free state, the upper block (91) is located inside the upper sleeve (4), and the lower block (92) is located inside the adjusting tube (6).

7. The rear support pole shock absorbing structure of claim 6, wherein: The lower end surface of the adjusting pipe (6) and the lower end surface are provided with limiting recesses (601), and the stepped surface (90) and the upper end surface of the lower sleeve (7) are provided with limiting convex points (602) matched with the limiting recesses (601).

Images