CN209924527U - A suspension bicycle device - Google Patents

Abstract

A suspension bicycle device, comprising a double rocker mechanism and a bicycle locking mechanism mounted on a connecting rod of the double rocker mechanism, the double rocker mechanism is composed of two active rods, two connecting rods, two driven rods, four The driving rod and the driven rod are composed of hinge brackets fixed on the ground at one end, and four cylindrical pins connecting the rods; the car-locking mechanism installed on the connecting rod of the double rocker mechanism consists of a parking handle device, a parking The wheel device is composed; the parking handlebar device consists of two horizontal parking handlebar brackets, two sleeve members sleeved on the handlebar brackets, two relatively movable cylinders in the sleeves and two mounted on the cylinders It is composed of a horseshoe lock for locking the handlebar, and the parking wheel device is composed of a horizontal parking wheel bracket, a sleeve member sleeved on the wheel bracket and a horseshoe lock installed on the sleeve to lock the wheel. The utility model provides a space-saving and simple suspension bicycle device.

Description

A suspension bicycle device

technical field

The utility model relates to a suspension bicycle device.

Background technique

In the process of rapid urbanization, all industries are experiencing a technological revolution. In this revolution, the rational use of resources and the promotion of green environmental protection have become the mainstream of development. With the increase of population, economic growth, and pollution caused by vehicle exhaust emissions, green travel has been advocated in recent years. The continuous promotion of bicycles as a green and pollution-free means of transportation and the further popularity of shared bicycles have further magnified the problem of bicycle parking. It is urgent to design a space-saving and simple parking device.

Today's installations are mainly based on parking frame and three-dimensional garage. However, the process and structure of the three-dimensional garage are complex, and the stability of the parking frame is poor and easily affected by strong winds.

Problems such as the random parking of bicycles occupying sidewalks, theft, and the sudden collapse of the wind have always affected the image of the city and campus. In the context of today's increasingly accelerated pace of life, it is very practical to propose a device that can quickly and automatically park a car.

SUMMARY OF THE INVENTION

In order to overcome the disadvantages of large occupied space and troublesome operation of existing bicycle parking methods, the utility model provides a space-saving and simple device for suspending bicycles.

The technical scheme adopted by the utility model to solve its technical problems is:

A bicycle suspension device includes a double rocker mechanism and a bicycle locking mechanism mounted on the connecting rod of the double rocker mechanism, the active rod of the double rocker mechanism is provided with torque by a motor, and the double rocker mechanism is composed of two It consists of a driving rod, two connecting rods, two driven rods, four hinge brackets for fixing one end of the driving rod and the driven rod on the ground, and four cylindrical pins connecting the rods; The car-locking mechanism on the connecting rod of the double rocker mechanism consists of a parking handle device and a parking wheel device; the parking handle device consists of two horizontal parking handle brackets and two A sleeve member, two relatively movable cylinders in the sleeve and two horseshoe locks mounted on the cylinders for locking the handlebars, one of the horizontal parking handlebar brackets and the upper end of one of the connecting rods are in interference Matching; the parking wheel device is composed of a horizontal parking wheel bracket, a sleeve member sleeved on the wheel bracket and a horseshoe lock installed on the sleeve to lock the wheel, the lower ends of the two connecting rods are respectively Interference fit with the end of the horizontally parked wheel bracket.

Further, in the double rocker mechanism, the driving rod and the hinge bracket are connected by a cylindrical pin, wherein the driving rod and the cylindrical pin are in interference fit, and the hinge bracket and the cylindrical pin are in transition fit; One end is connected, and both are in transition fit with the cylindrical pin; the other end of the driven rod is connected with the hinge bracket through the cylindrical pin.

The beneficial effects of the utility model are mainly manifested in: 1) the overall structure is simple, the reliability is high, and the manufacturing cost is low. 2) The final state is the dead center position of the four-bar mechanism, which can lock the parked vehicle more firmly and has high stability. 3) The double rocker mechanism of the device is designed based on plane modeling, so that the device occupies less ground space after docking within the stable docking range.

Description of drawings

Figure 1 is a schematic diagram of a four-bar mechanism modeling;

Fig. 2 is the concrete implementation schematic diagram of bicycle parking process;

FIG. 3 is a schematic perspective view of the suspension bicycle device.

Fig. 4 is a front view of the suspension bicycle device.

In Figures 3 and 4, 1 is the driving rod, 2 is the connecting rod, 3 is the driven rod, 4 is the hinge bracket that fixes one end of the driving rod and the driven rod on the ground, the connection between 2 and 1, 3 It is a member that can form a rotating pair such as a cylindrical pin; 5 is a handlebar bracket for horizontal parking, and 6 is a sleeve member sleeved on the handlebar bracket, a relatively movable cylinder in the sleeve and a cylinder mounted on the cylinder. 7 is a horseshoe lock for locking the handlebar; 7 is a horizontally parked wheel bracket, 8 is a sleeve member sleeved on the wheel bracket, and 9 is a horseshoe lock on the sleeve to lock the wheel.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

1 to 4, a bicycle suspension device includes a double rocker mechanism and a bicycle locking mechanism mounted on the connecting rod of the double rocker mechanism. The active rod of the double rocker mechanism is provided with torque by a motor. The double rocker mechanism consists of two active rods 1, two connecting rods 2, two driven rods 3, four hinge brackets 4 that fix one end of the active rod 1 and the driven rod 3 on the ground, and four It consists of cylindrical pins connected by rods; the locking mechanism installed on the connecting rod of the double rocker mechanism consists of a parking handle device and a parking wheel device; the parking handle device consists of two horizontal parking A handlebar bracket 5, two sleeve members 6 sleeved on the handlebar bracket, two relatively movable cylinders in the sleeve, and two horseshoe locks mounted on the cylinders for locking the handlebar, wherein A horizontal parking handlebar bracket is in interference fit with the upper end of one of the connecting rods; the parking wheel device is composed of a horizontal parking wheel bracket 7, a sleeve member 8 sleeved on the wheel bracket and a sleeve member mounted on the sleeve. The horseshoe lock 9 for locking the wheel is formed, and the lower ends of the two connecting rods are respectively in interference fit with the ends of the horizontally parked wheel brackets.

Further, in the double rocker mechanism, the active rod and the hinge bracket are connected by a cylindrical pin, wherein the active rod and the cylindrical pin are in interference fit, and the hinge bracket and the cylindrical pin are in transition fit. The connecting rod is connected with the other end of the driving rod and one end of the driven rod, and both are in transition fit with the cylindrical pin. The other end of the driven rod and the hinge bracket are connected and matched by cylindrical pins.

The linkages on the double rocker mechanism are designed so that the unit can be docked on most models of bicycles. The device on the connecting rod allows people to lock the bicycle on the ground first, and after locking, the bicycle can move in the air with the movement of the four-bar mechanism. Finally, the four-bar mechanism is 180 degrees after the angle between the active rod and the connecting rod is 180 degrees. stop. Proceed as follows:

① Park the bicycle at the designated position first, and lock the wheels with the lock wheel horseshoe lock; the horizontal parking handlebar bracket and the sleeve member sleeved on the handlebar bracket can rotate relative to each other. The cylinders can move relative to each other, so as to locate the horseshoe lock and grab the handlebar.

②After the bicycle is grasped, the motor starts to start, and the two active rods connected to the motor start to rotate at the same angular speed. At the same time, the horizontally parked handlebar bracket and the sleeve member sleeved on the handlebar bracket will passively oppose each other. There is passive relative movement between the rotating, sleeve member and the cylinder within the sleeve.

③ When it is detected that the angle between the active rod and the connecting rod is one hundred and eighty degrees, the motor stops rotating and reaches the final state.

A method of designing a four-bar mechanism suspension bicycle device:

(1) Determine the length of the connecting rod, which is a length determined by the parameters of most bicycle main brackets, so that the length is the connecting rod length b of the double rocker mechanism.

(2) Based on the condition that the parking space is as small as possible, the frame length d of the double rocker mechanism is set to 1000mm.

(3) Establish a plane coordinate system with the intersection of the driven rod and the frame as the origin of the coordinate system, the intersection of the driven rod and the connecting rod is point A (x ₁ , y ₁ ), and the intersection of the driving rod and the frame is point C (x ₂ , 0), the angle between the driving rod and the frame is point α, and the angle between the driven rod and the driving rod is θ, as shown in Figure 2. Taking the final state of the bicycle parked as a model, the final state is that the angle between the connecting rod and the active rod is one hundred and eighty degrees, that is, the angle α is equal to the angle θ. From the above conditions, the coordinates of point B can be obtained as (x ₁ +bcosα, y ₁ -bsinα). Set up constraints and objective functions.

The constraints are:

①In order to meet the engineering calculation allowance, when the double rocker mechanism reaches the final state of parking, the distance h between the rear wheel of the bicycle and the ground is greater than or equal to 50 mm, that is, the conditions must be met:

②The size of the angle α should not be too large, too large will make the whole mechanical device unstable after parking; but α should not be too small, too small will make the final horizontal projection of the bicycle after parking will be larger. To sum up, it means that the size of the angle α should be controlled within a certain interval. We make the upper tangent line tangent to the rear wheel according to the handle of the 24-inch small yellow car, so that the angle between it and the horizontal ground is θ ₀ , and use it To constrain the size of the angle α: the above-mentioned angle θ ₀ is measured and measured to be about 23 degrees, because the bicycle is at an angle α with the ground as a whole after parking, and because our principle is that the projection length of the bicycle on the ground is the shortest, so after parking The angle θ ₀ is about 90 degrees as far as possible, that is, after the final stop, the angle α≤90°-23°=67°. Because the model angle θ ₀ we choose is relatively large, we design this constraint:

α≤72°

③ In order to ensure the good force transmission performance of the double rocker mechanism, according to the requirements on the minimum transmission angle mentioned in the mechanical principle [1], we obtained the constraints on this requirement:

γ _min ≥ 40°.

Set the transmission angle of the double rocker mechanism: the transmission angle is γ _min1 at the beginning; it will reach the maximum value of 90 degrees during the period, and then continue to decrease to γ _min2 . Constraints must be met:

γ _min =min{γ _min1 , γ _min2 }≥40°

It is assumed that γ _min2 <γ _min1 , that is, γ _min =γ _min2 . The above assumptions have been verified.

Because γ is the angle between the connecting rod and the driven rod, according to the triangular geometric relationship, we can get γ=180°-α-β, and thus obtain the constraint conditions with the same meaning:

α+β≤140°

The objective function is:

When the double rocker mechanism reaches the final state of parking, the projected length of the bicycle in the horizontal direction is the shortest. Because if the angle α is determined, the projected length of the bicycle in the horizontal direction is also determined, and the larger the angle α, the shorter the projected length, so the objective function can use the angle α to do the same processing. which is:

(4) Using Lingo programming, we can find the optimal driving rod length a and driven rod length c that we want.

Claims (2)

1. A bicycle suspension device is characterized by comprising a double-rocker mechanism and a bicycle locking mechanism arranged on a connecting rod of the double-rocker mechanism, wherein a driving rod of the double-rocker mechanism is provided with torque by a motor, and the double-rocker mechanism consists of two driving rods, two connecting rods, two driven rods, four hinged supports for fixing one ends of the driving rods and one ends of the driven rods on the ground and four cylindrical pins for connecting the rods; the locking mechanism arranged on the connecting rod of the double-rocker mechanism consists of a parking handle device and a parking wheel device; the parking vehicle handle device consists of two horizontal parking vehicle handle brackets, two sleeve components sleeved on the vehicle handle brackets, two cylinders capable of moving relatively in the sleeves and two horseshoe locks which are arranged on the cylinders and used for locking the vehicle handle, wherein one horizontal parking vehicle handle bracket is in interference fit with the upper end of one connecting rod; the parking wheel device is composed of a horizontal parking wheel support, a sleeve component sleeved on the wheel support and a horseshoe lock which is arranged on the sleeve and used for locking the wheel, and the lower ends of the two connecting rods are in interference fit with the end part of the horizontal parking wheel support respectively.

2. The apparatus for suspending a bicycle according to claim 1, wherein the driving lever is connected to the hinge bracket through a cylindrical pin, wherein the driving lever is in interference fit with the cylindrical pin, the hinge bracket is in transition fit with the cylindrical pin, and the connecting rod is connected to the other end of the driving lever and one end of the driven lever, and is in transition fit with the cylindrical pin; the other end of the driven rod is connected with the hinge support through a cylindrical pin.

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