Mechanical speed changing type transmission structure and grease gun

Abstract

The invention provides a mechanical speed changing type transmission structure and a grease gun. The mechanical speed changing type transmission structure comprises a motor, the planetary gear assembly is connected with the motor and is driven by the motor to rotate; the speed changing gear assembly is meshed with the planetary gear assembly so as to be driven by the planetary gear assembly to rotate; the speed change gear assembly comprises a speed change duplicate gear, a static duplicate gear and a speed change switch connected with the speed change duplicate gear, the speed change duplicate gear comprises a first speed change gear and a second speed change gear, and the static duplicate gear comprises a first static gear and a second static gear; when the first speed changing gear is meshed with the first static gear, the output rotating speed of the static duplicate gear is a first rotating speed; when the speed change switch controls the speed change duplicate gear to move to enable the second speed change gear to be meshed with the second static gear, the output rotating speed of the static duplicate gear is a second rotating speed, and the first rotating speed is not equal to the second rotating speed. According to the grease gun, the mechanical speed changing effect can be achieved, and quantitative grease supply is achieved.

Description

Technical Field

[0001] The invention relates to a mechanical speed-changing transmission structure and a grease gun, belonging to the technical field of grease guns. Background Art

[0002] A grease gun is a hand tool used to add grease to mechanical equipment.

[0003] Currently, most grease guns on the market use electronic speed regulation to achieve the function of quantitative oil supply. However, this type of speed regulation has the problem of unstable oil output and short working time due to electronic speed regulation, which is not as reliable as mechanical structure.

[0004] In view of this, it is necessary to improve the existing grease gun speed regulation method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a mechanical speed-changing transmission structure to realize mechanical speed-changing during the operation of a grease gun and to play the role of quantitative oil supply.

[0006] To achieve the above object, the present invention provides a mechanical speed-changing transmission structure, comprising:

[0007] Motor;

[0008] a planetary gear assembly connected to the motor and driven to rotate by the motor; and

[0009] a speed-changing gear assembly meshing with the planetary gear assembly to rotate under the drive of the planetary gear assembly; the speed-changing gear assembly comprises a speed-changing double gear, a static double gear and a speed-changing switch connected to the speed-changing double gear, the speed-changing double gear comprises a first speed-changing gear and a second speed-changing gear, and the static double gear comprises a first static gear and a second static gear;

[0010] When the first speed-changing gear is meshed with the first static gear, the output speed of the static double gear is a first speed; when the speed-changing switch controls the speed-changing double gear to move so that the second speed-changing gear is meshed with the second static gear, the output speed of the static double gear is a second speed, and the first speed is not equal to the second speed.

[0011] As a further improvement of the present invention, the first speed-shift gear and the second speed-shift gear are parallel to each other and arranged at intervals, and one end of the speed-shift switch is arranged between the first speed-shift gear and the second speed-shift gear so that when the speed-shift switch is turned, the first speed-shift gear and the second speed-shift gear can be driven to move.

[0012] As a further improvement of the present invention, the first static gear and the second static gear are arranged in close contact, a connecting portion is provided between the first speed-changing gear and the second speed-changing gear, and one end of the speed-changing switch is fixedly connected to the connecting portion.

[0013] As a further improvement of the present invention, the width of the connecting portion is greater than or equal to the thickness of the first static gear, the outer diameter of the first speed-changing gear is greater than the outer diameter of the second speed-changing gear, and the outer diameter of the first static gear is smaller than the outer diameter of the second static gear.

[0014] As a further improvement of the present invention, the speed change gear assembly also includes a connecting shaft, the speed change double gear is installed on the connecting shaft, and can move forward and backward relative to the connecting shaft, so that under the drive of the speed change switch, the speed change double gear is engaged and switched with the first static gear and the second static gear to achieve speed change.

[0015] As a further improvement of the present invention, the speed change gear assembly also includes a cylindrical gear, which is fixedly mounted on the connecting shaft and located on one side of the speed change double gear. The cylindrical gear is meshed with the planetary gear assembly to drive the cylindrical gear and the connecting shaft to rotate when the planetary gear assembly rotates.

[0016] As a further improvement of the present invention, the speed change gear assembly also includes a magnet and a sensor arranged opposite to the magnet. The magnet is arranged at one end of the static double gear and can rotate with the static double gear. The sensor is used to sense the magnetic field signal emitted by the magnet and thereby record the number of rotations of the static double gear.

[0017] As a further improvement of the present invention, the magnet is arranged in a cylindrical shape, a groove is arranged on the side wall of the first static gear, the magnet is accommodated and fixed in the groove, and the sensor is arranged close to the first static gear and faces the groove.

[0018] As a further improvement of the present invention, the gear ratio of the first speed-changing gear to the first static gear is 1:1.5, and the gear ratio of the second speed-changing gear to the second static gear is 1:3.5.

[0019] Another object of the present invention is to provide a grease gun having the above-mentioned mechanical speed-changing transmission structure.

[0020] To achieve the above object, the present invention provides a grease gun, comprising:

[0021] ontology;

[0022] chassis;

[0023] A mechanical speed-changing transmission structure, the mechanical speed-changing transmission structure is contained in the housing and comprises:

[0024] Motor;

[0025] a planetary gear assembly connected to the motor and driven to rotate by the motor; and

[0026] a speed-changing gear assembly meshing with the planetary gear assembly to rotate under the drive of the planetary gear assembly; the speed-changing gear assembly comprises a speed-changing double gear, a static double gear and a speed-changing switch connected to the speed-changing double gear, the speed-changing double gear comprises a first speed-changing gear and a second speed-changing gear, and the static double gear comprises a first static gear and a second static gear;

[0027] When the first speed-changing gear is meshed with the first static gear, the output speed of the static double gear is a first speed; when the speed-changing switch controls the speed-changing double gear to move so that the second speed-changing gear is meshed with the second static gear, the output speed of the static double gear is a second speed, and the first speed is not equal to the second speed.

[0028] The beneficial effects of the present invention are as follows: the present invention arranges the speed-changing double gear to include a first speed-changing gear and a second speed-changing gear, and arranges the static double gear to include a first static gear and a second static gear; thereby, when the first speed-changing gear is meshed with the first static gear, the output speed of the static double gear is a first speed; and when the speed-changing switch controls the speed-changing double gear to move so that the second speed-changing gear is meshed with the second static gear, the output speed of the static double gear is a second speed, and the first speed is not equal to the second speed, thereby realizing mechanical speed changing when the grease gun is working, and achieving quantitative oil supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional view of a grease gun of the present invention.

[0030] Figure 2 yes Figure 1 CC direction cross-sectional view.

[0031] Figure 3 yes Figure 1 Enlarged view of the circle A in the middle.

[0032] Figure 4 yes Figure 3 Enlarged view of the circle B in the middle. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See also Figure 1-Figure 2 As shown, the present invention discloses a grease gun 100, comprising a housing 101, an oil storage assembly 102, an eccentric reciprocating structure 103, and a mechanical speed-changing transmission structure 104. The mechanical speed-changing transmission structure 104 is housed in the housing 101 and connected to the eccentric reciprocating structure 103 to form a transmission assembly, driving the eccentric reciprocating structure 103 to move, and the oil storage assembly 102 is connected to the eccentric reciprocating structure 103, thereby discharging the grease in the oil storage assembly 102.

[0035] In this embodiment, the oil storage assembly 102 includes an oil storage cylinder 4, a push rod 5 arranged in the oil storage cylinder 4 for squeezing butter, a piston 51 fixed at the end of the push rod 5, and a coil spring 6 for driving the push rod 5 to squeeze the butter. The oil outlet end of the oil storage cylinder 4 is connected to the pump 7 to squeeze the butter in the oil storage cylinder 4 into the pump 7. A pressure relief valve 8 is provided at the bottom of the pump 7 to maintain the pressure balance in the pump 7.

[0036] The eccentric reciprocating structure 103 includes a plunger 9, one end of which is inserted into the pump 7, and the other end is fixedly connected to an eccentric block 10, and an oil seal 11 is provided at the connection between the plunger 9 and the pump 7. The eccentric block 10 has an arc-shaped hole, and the eccentric block 10 is supported in front of a connecting member 12 in an up-and-down manner, and an eccentric shaft 13 is provided in the arc-shaped hole of the eccentric block 10, and the eccentric shaft 13 and the connecting member 12 are interference-fitted.

[0037] When the connecting member 12 rotates, the eccentric shaft 13 eccentrically moves, and the eccentric mass 10 reciprocates up and down by the amount of movement of the eccentric shaft 13 in the up and down direction, so that the plunger 9 moves up and down, and the pump 7 pumps out the butter supplied from the oil storage cylinder 4 through the up and down movement of the plunger 9, and discharges it directly through the hose 14. This discharge action is repeated along with the reciprocating movement of the plunger 9.

[0038] like Figure 3-Figure 4 Combined with Figure 1 As shown, the mechanical speed-changing transmission structure 104 includes a motor 1, a planetary gear assembly 2, and a speed-changing gear assembly 3, wherein the planetary gear assembly 2 is connected to the motor 1 and driven to rotate by the motor 1; the speed-changing gear assembly 3 is meshed with the planetary gear assembly 2 to rotate under the drive of the planetary gear assembly 2. The specific structures of the motor 1 and the planetary gear assembly 2 can adopt existing technical solutions, so they are not described in detail here.

[0039] The speed-changing gear assembly 3 includes a speed-changing double gear 31, a static double gear 32 and a speed-changing switch 33 connected to the speed-changing double gear 31, the speed-changing double gear 31 includes a first speed-changing gear 311 and a second speed-changing gear 312, and the static double gear 32 includes a first static gear 321 and a second static gear 322; when the first speed-changing gear 311 is meshed with the first static gear 321, the output speed of the static double gear 32 is a first speed; when the speed-changing switch 33 controls the speed-changing double gear 31 to move so that the second speed-changing gear 312 is meshed with the second static gear 322, the output speed of the static double gear 32 is a second speed, and the first speed is not equal to the second speed. In this way, the grease gun 100 achieves the effect of mechanical speed changing.

[0040] In this embodiment, the static double gear 32 and the connecting member 12 are pressed into an integral structure. At the first speed and the second speed, the eccentric reciprocating structure 103 moves at different speeds, thereby changing the pressure in the pump 7 and adjusting the butter discharge efficiency.

[0041] Specifically, the first speed-shift gear 311 and the second speed-shift gear 312 are parallel to each other and spaced apart, and one end of the speed-shift switch 33 is disposed between the first speed-shift gear 311 and the second speed-shift gear 312, so that when the speed-shift switch 33 is turned, the first speed-shift gear 311 and the second speed-shift gear 312 can be driven to move.

[0042] A connecting portion 313 is provided between the first speed-changing gear 311 and the second speed-changing gear 312, and one end of the speed-changing switch 33 is fixedly connected to the connecting portion 313. Further, the width of the connecting portion 313 is greater than or equal to the thickness of the first static gear 321, the first static gear 321 and the second static gear 322 are arranged in close contact, and the outer diameter of the first static gear 321 is smaller than the outer diameter of the second static gear 322, and the outer diameter of the first speed-changing gear 311 is larger than the outer diameter of the second speed-changing gear 312. Thus, when the first speed-changing gear 311 is meshed with the first static gear 321, the second speed-changing gear 312 moves to the outside of the second static gear 322, and the second static gear 322 is arranged opposite to the connecting portion 313; and when the second speed-changing gear 312 is meshed with the second static gear 322, the first speed-changing gear 311 moves to the outside of the first static gear 321, and the first static gear 321 is arranged opposite to the connecting portion 313.

[0043] The speed-changing gear assembly 3 further includes a connecting shaft 34, on which the speed-changing double gear 31 is mounted and can move forward and backward relative to the connecting shaft 34, so that under the drive of the speed-changing switch 33, the speed-changing double gear 31 can be meshed and switched with the first static gear 321 and the second static gear 322 to achieve speed change. The connecting shaft 34 can be a spline shaft or a shaft of other structures; when the connecting shaft 34 is a spline shaft, the speed-changing double gear 31 is matched with the spline shaft through the spline clearance, so that the speed-changing double gear 31 can move forward and backward under the toggle of the speed-changing switch 33.

[0044] In this embodiment, the gear ratio between the first speed-changing gear 311 and the first static gear 321 is 1:1.5, the gear ratio between the second speed-changing gear 312 and the second static gear 322 is 1:3.5, and the first speed is greater than the second speed. In other words, the speed of the gears can be changed by utilizing the gear ratio between the gears.

[0045] The speed-changing gear assembly 3 also includes a cylindrical gear 35, which is fixedly mounted on the connecting shaft 34 and is located on one side of the speed-changing double gear 31. The cylindrical gear 35 is meshed with the planetary gear assembly 2, so that when the planetary gear assembly 2 rotates, it can drive the cylindrical gear 35 and the connecting shaft 34 to rotate.

[0046] like Figure 1 and Figure 4 As shown, the speed-changing gear assembly 3 further includes a magnet 36 and a sensor 37 arranged opposite to the magnet 36. The magnet 36 is arranged at one end of the static double gear 32 and can rotate with the static double gear 32. The sensor 37 is used to sense the magnetic field signal emitted by the magnet 36. Preferably, the magnet 36 is arranged in a cylindrical shape, a groove 39 is arranged on the side wall of the first static gear 321, the magnet 36 is received and fixed in the groove 39, and the sensor 37 is arranged close to the first static gear 321 and faces the groove 39. The sensor 37 is connected to the controller 38. When the static double gear 32 rotates, the magnet 36 emits a magnetic field signal. The sensor 37 senses the magnetic field signal and transmits it to the controller 38. The controller 38 receives the magnetic field signal, thereby recording the number of rotations of the static double gear 32 and achieving quantitative oil supply after data conversion. Since the static double gear 32 and the connecting member 12 are pressed into an integral structure, the data of the oil supply amount is relatively accurate.

[0047] In summary, the present invention arranges the speed-changing double gear 31 to include the first speed-changing gear 311 and the second speed-changing gear 312, and arranges the static double gear 32 to include the first static gear 321 and the second static gear 322; so that when the first speed-changing gear 311 is meshed with the first static gear 321, the output speed of the static double gear 32 is the first speed; and when the speed-changing switch 33 controls the speed-changing double gear 31 to move so that the second speed-changing gear 312 is meshed with the second static gear 322, the output speed of the static double gear 32 is the second speed, and the first speed is not equal to the second speed, thereby realizing mechanical speed changing when the grease gun 100 is working, and achieving quantitative oil supply.

[0048] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A mechanical speed-changing transmission structure, characterized in that: include: Motor; a planetary gear assembly connected to the motor and driven to rotate by the motor; and a speed-changing gear assembly meshing with the planetary gear assembly to rotate under the drive of the planetary gear assembly; the speed-changing gear assembly comprises a speed-changing double gear, a static double gear and a speed-changing switch connected to the speed-changing double gear, the speed-changing double gear comprises a first speed-changing gear and a second speed-changing gear, and the static double gear comprises a first static gear and a second static gear; When the first speed-changing gear is meshed with the first static gear, the output speed of the static duplex gear is a first speed; When the speed-changing switch controls the speed-changing double gear to move so that the second speed-changing gear is meshed with the second static gear, the output speed of the static double gear is a second speed, and the first speed is not equal to the second speed.

2. The mechanical speed-changing transmission structure according to claim 1, characterized in that: The first speed-shift gear and the second speed-shift gear are parallel to each other and spaced apart, and one end of the speed-shift switch is disposed between the first speed-shift gear and the second speed-shift gear so that when the speed-shift switch is turned, the first speed-shift gear and the second speed-shift gear can be driven to move.

3. The mechanical speed-changing transmission structure according to claim 2, characterized in that: The first static gear and the second static gear are arranged in close contact with each other, a connecting portion is provided between the first speed-changing gear and the second speed-changing gear, and one end of the speed-changing switch is fixedly connected to the connecting portion.

4. The mechanical speed-changing transmission structure according to claim 3, characterized in that: The width of the connecting portion is greater than or equal to the thickness of the first static gear, the outer diameter of the first speed-changing gear is greater than the outer diameter of the second speed-changing gear, and the outer diameter of the first static gear is smaller than the outer diameter of the second static gear.

5. The mechanical speed-changing transmission structure according to claim 1, characterized in that: The speed-changing gear assembly also includes a connecting shaft, and the speed-changing double gear is mounted on the connecting shaft and can move forward and backward relative to the connecting shaft, so that under the drive of the speed-changing switch, the speed-changing double gear is meshed and switched with the first static gear and the second static gear to achieve speed changing.

6. The mechanical speed-changing transmission structure according to claim 5, characterized in that: The speed-changing gear assembly also includes a cylindrical gear, which is fixedly mounted on the connecting shaft and located on one side of the speed-changing double gear. The cylindrical gear is meshed with the planetary gear assembly to drive the cylindrical gear and the connecting shaft to rotate when the planetary gear assembly rotates.

7. The mechanical speed-changing transmission structure according to claim 1, characterized in that: The speed change gear assembly also includes a magnet and a sensor arranged opposite to the magnet. The magnet is arranged at one end of the static double gear and can rotate with the static double gear. The sensor is used to sense the magnetic field signal emitted by the magnet and thereby record the number of rotations of the static double gear.

8. The mechanical speed-changing transmission structure according to claim 7, characterized in that: The magnet is arranged in a cylindrical shape, a groove is arranged on the side wall of the first static gear, the magnet is received and fixed in the groove, and the sensor is arranged close to the first static gear and faces the groove.

9. The mechanical speed-changing transmission structure according to claim 1, characterized in that: The gear ratio of the first speed-changing gear to the first static gear is 1:1.5, and the gear ratio of the second speed-changing gear to the second static gear is 1:3.

5.

10. A grease gun, characterized in that: include: ontology; chassis; A mechanical speed-changing transmission structure, the mechanical speed-changing transmission structure is contained in the housing and comprises: Motor; a planetary gear assembly connected to the motor and driven to rotate by the motor; and a speed-changing gear assembly meshing with the planetary gear assembly to rotate under the drive of the planetary gear assembly; the speed-changing gear assembly comprises a speed-changing double gear, a static double gear and a speed-changing switch connected to the speed-changing double gear, the speed-changing double gear comprises a first speed-changing gear and a second speed-changing gear, and the static double gear comprises a first static gear and a second static gear; When the first speed-changing gear is meshed with the first static gear, the output speed of the static double gear is a first speed; when the speed-changing switch controls the speed-changing double gear to move so that the second speed-changing gear is meshed with the second static gear, the output speed of the static double gear is a second speed, and the first speed is not equal to the second speed.

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