Propelling mechanism and rock drill system

Abstract

The utility model discloses a propulsion mechanism and a rock drill system, and the propulsion mechanism comprises a propulsion beam which is provided with a movable supporting plate; the propelling oil cylinder comprises a first cylinder body and a first piston rod, and the first piston rod is fixed to the propelling beam; the telescopic device is arranged at the end, away from the first piston rod, of the first cylinder body and can stretch out and draw back relative to the first cylinder body, and the telescopic device is configured to stretch out when the thrust oil cylinder stretches out and retract back when the thrust oil cylinder stretches out; the progress guide wheel is arranged at the telescopic end of the telescopic device, and a progress steel wire rope with the two ends fixed to the propelling beam and the supporting plate correspondingly is wound around the progress guide wheel; the return guide wheel is arranged at the end, close to the first piston rod, of the first cylinder body, and a return steel wire rope with the two ends fixed to the propelling beam and the supporting plate is wound around the return guide wheel. The moving direction of the supporting plate, the telescopic direction of the thrust oil cylinder and the telescopic direction of the telescopic device are parallel. The propelling mechanism can automatically tension the progress steel wire rope and prevent the progress steel wire rope from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of mining machinery, in particular to a propulsion mechanism and a rock drill system. Background Art

[0002] At present, the forward and backward movement of the rock drill is usually controlled by a propulsion mechanism, which is completed by using a propulsion cylinder in conjunction with a forward wire rope and a return wire rope. Figure 1 and Figure 2 As shown, the rock drill 700 is movably arranged on the propulsion beam 100 through the support plate 110, the first piston rod 220 of the propulsion cylinder 200 is connected and fixed to the propulsion beam 100, and the first cylinder body 210 of the propulsion cylinder 200 can move relative to the propulsion beam 100, and the extension direction of the propulsion cylinder 200 is consistent with the length direction of the propulsion beam 100 ( Figure 1 The front-to-rear direction in the drawing is shown in FIG. 2 ), the first cylinder body 210 is in front and the first piston rod 220 is in the rear, the process guide wheel 300 and the return guide wheel 400 are both installed on the first cylinder body 210 of the propulsion cylinder 200, and the process guide wheel 300 is in front and the return guide wheel 400 is in the rear, the process wire rope 310 is wound around the process guide wheel 300 and one end is connected to the support plate 110 and the other end is connected to the propulsion beam 100, the return wire rope 410 is wound around the return guide wheel 400 and one end is connected to the support plate 110 and the other end is connected to the propulsion beam 100, in actual application, the process wire rope 310 is distributed on the upper and lower sides of the process guide wheel 300 and the process wire ropes 310 on both sides are parallel, while the return wire rope 410 is distributed on the left and right sides of the return guide wheel 400, and affected by the arrangement of the rock drill 700, the return wire ropes 410 on both sides of the return guide wheel 400 cannot be parallel, which will produce a The problem is that when the return wire rope 410 is subjected to the force to drive the rock drill 700 to retreat, since the distance between the progress guide wheel 300 and the return guide wheel 400 remains unchanged and the return wire ropes 410 on both sides of the return guide wheel 400 are not parallel, the length of the return wire rope 410 relative to the return guide wheel 400 is actually greater than the length of the progress wire rope 310 relative to the progress guide wheel 300. At this time, the progress wire rope 310 will loosen, causing the progress wire rope 310 to easily break away from the progress guide wheel 300 and be squeezed between the progress guide wheel 300 and the wire rope stopper 330. The progress wire rope 310 is easily broken after being squeezed and needs frequent maintenance. However, in actual use, due to the installation method of the return wire rope 410, the return wire rope 410 rarely becomes loose. In addition, the wire rope itself will also wear and stretch during use, which is also easy to cause loosening. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model proposes a propulsion mechanism which can automatically tension a process wire rope to prevent the process wire rope from loosening.

[0004] The utility model also provides a rock drill system.

[0005] The propulsion mechanism according to the first embodiment of the utility model comprises:

[0006] A propulsion beam provided with a movable pallet;

[0007] A propulsion cylinder, comprising a first cylinder body and a first piston rod, wherein the first piston rod is fixed to the propulsion beam;

[0008] a telescopic device, provided at one end of the first cylinder body away from the first piston rod and capable of telescoping relative to the first cylinder body, the telescopic device being configured to extend when the propulsion cylinder contracts and to contract when the propulsion cylinder extends;

[0009] A process guide wheel is arranged at the telescopic end of the telescopic device, and a process wire rope is wound around the process guide wheel, with two ends respectively fixed to the propulsion beam and the support plate;

[0010] A return guide wheel is provided at one end of the first cylinder body close to the first piston rod, and a return steel wire rope is wound around the return guide wheel, with two ends respectively fixed to the propulsion beam and the support plate;

[0011] Wherein, the moving direction of the support plate, the telescopic direction of the propulsion cylinder and the telescopic direction of the telescopic device are parallel.

[0012] The propulsion mechanism according to the embodiment of the utility model has at least the following beneficial effects:

[0013] During operation, if it is necessary to retract the pallet, the propulsion cylinder is retracted to drive the return guide wheel to move backward, thereby pulling the pallet back along the propulsion beam through the return wire rope. The propulsion cylinder contracts to drive the process guide wheel, the first cylinder body, and the return guide wheel to move backward as a whole, while the telescopic device is extended to make the process guide wheel move forward a distance relative to the first cylinder body, thereby automatically tensioning the process wire rope to prevent the process wire rope from slackening and detaching from the process guide wheel; and if it is necessary to advance the pallet, the propulsion cylinder is extended to drive the process guide wheel to move forward, thereby pulling the pallet forward along the propulsion beam through the process wire rope. When the propulsion cylinder is extended to drive the process guide wheel, the first cylinder body, and the return guide wheel to move forward as a whole, the telescopic device is retracted and reset, making the process guide wheel move backward a distance relative to the first cylinder body, in preparation for the next retreat of the pallet. Since the pallet moves forward by the process guide wheel moving forward to drive the process wire rope to pull the pallet forward, the process wire rope is always kept in a tensioned state when the pallet moves forward. The propulsion mechanism of the embodiment of the utility model is configured with a retractable telescopic device between the process guide wheel and the first cylinder body of the propulsion cylinder, so that when the pallet retracts, the telescopic device can be used to drive the process guide wheel to move forward a certain distance relative to the first cylinder body, so as to automatically tension the process wire rope and prevent the process wire rope from loosening.

[0014] According to some embodiments of the present utility model, the propulsion cylinder and the telescopic device telescope along the same axis.

[0015] According to some embodiments of the utility model, the telescopic device is configured as a tensioning cylinder, which includes a second cylinder body and a second piston rod, the second cylinder body is fixed to an end of the first cylinder body away from the first piston rod, and the second piston rod is connected to the progress guide wheel.

[0016] According to some embodiments of the utility model, the propulsion cylinder is configured as a double-acting cylinder, the first cylinder body having a first rod chamber and a first rodless chamber, both of which are used for the entry and exit of oil, the tensioning cylinder is configured as a single-acting cylinder, the second cylinder body having a second rod chamber and a second rodless chamber, the second rodless chamber being used for the entry and exit of oil, the second rod chamber being connected to the atmosphere, and the first rod chamber being connected to the second rodless chamber.

[0017] According to some embodiments of the present invention, a first sealing member is provided at one end of the second piston rod close to the second rodless cavity for isolating the second rod cavity from the second rodless cavity.

[0018] According to some embodiments of the present utility model, the second cylinder body is provided with an oil hole connected to the second rodless chamber, and the oil hole is connected to the first rod chamber through a pipeline.

[0019] According to some embodiments of the utility model, an air hole connecting the second rod chamber and the atmosphere is provided on the second cylinder body, and a filtering structure is provided at the air hole.

[0020] According to some embodiments of the utility model, the propulsion mechanism also includes a hydraulic system, which includes an oil tank, a hydraulic pump and a control valve group, and the control valve group has a first oil port, a second oil port, a third oil port, and a fourth oil port. The first oil port is used to connect the hydraulic pump, the second oil port is used to connect the oil tank, the third oil port is used to connect the first rodless chamber, and the fourth oil port is used to connect the first rod chamber and the second rodless chamber.

[0021] According to some embodiments of the present invention, the control valve group includes a reversing valve group.

[0022] The propulsion mechanism according to the embodiment of the second aspect of the utility model includes: the propulsion mechanism described in the above embodiment; and a rock drill installed on the support plate.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 It is a side view of a propulsion mechanism in the prior art;

[0026] Figure 2 It is a top view of the propulsion mechanism in the prior art;

[0027] Figure 3 It is a structural schematic diagram of the propulsion mechanism of an embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the installation structure of the telescopic device of an embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of a hydraulic system of an embodiment of the utility model.

[0030] Figure Number:

[0031] Propulsion beam 100, support plate 110;

[0032] Propulsion cylinder 200, first rod chamber 201, first rodless chamber 202, first cylinder body 210, first piston rod 220;

[0033] Process guide wheel 300, process wire rope 310, second mounting seat 320, wire rope stopper 330;

[0034] Return guide wheel 400, return wire rope 410, first mounting seat 420;

[0035] The tensioning oil cylinder 500, the second rod chamber 501, the second rodless chamber 502, the second cylinder body 510, the oil hole 511, the air hole 512, the second piston rod 520, the first sealing member 530, the second sealing member 540, and the guide copper sleeve 550;

[0036] Hydraulic system 600, oil tank 610, hydraulic pump 620, control valve group 630;

[0037] Rock drill 700. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] Reference Figure 3 and Figure 4 As shown, a propulsion mechanism of an embodiment of the utility model includes: a propulsion beam 100, a propulsion cylinder 200, a telescopic device, a forward guide wheel 300, and a return guide wheel 400.

[0043] A movable support plate 110 is provided at the upper end of the propulsion beam 100. The support plate 110 is arranged horizontally. The moving direction of the support plate 110 is the same as the length direction of the propulsion beam 100. The support plate 110 can be used to install the rock drill 700. In this embodiment, the moving direction (forward and backward) of the support plate 110 is represented by the forward and backward direction.

[0044] The propulsion cylinder 200 includes a first cylinder body 210 and a first piston rod 220 . The first piston rod 220 of the propulsion cylinder 200 is fixed to the propulsion beam 100 . In this embodiment, the first cylinder body 210 is at the front and the first piston rod 220 is at the rear.

[0045] The telescopic device is arranged at one end of the first cylinder body 210 away from the first piston rod 220, that is, at the front end of the first cylinder body 210. The telescopic device can be telescopic relative to the first cylinder body 210. In this embodiment, the front end of the telescopic device is the telescopic end, and the telescopic device is configured to extend when the propulsion cylinder 200 contracts and to contract when the propulsion cylinder 200 extends, wherein the moving direction of the support plate 110, the telescopic direction of the propulsion cylinder 200 and the telescopic direction of the telescopic device are parallel, and are all front-to-back directions.

[0046] The process guide wheel 300 is arranged at the telescopic end of the telescopic device, that is, at the front end of the telescopic device. A process wire rope 310 is wound around the process guide wheel 300. One end of the process wire rope 310 is fixed to the propulsion beam 100 and the other end is fixed to the support plate 110. Specifically, the telescopic end of the telescopic device is provided with a second mounting seat 320, and the process guide wheel 300 is installed on the second mounting seat 320. A wire rope stopper 330 is provided on the second mounting seat 320.

[0047] The return guide wheel 400 is disposed at one end of the first cylinder 210 close to the first piston rod 220, that is, at the rear end of the first cylinder 210. A return wire rope 410 is wound around the return guide wheel 400. One end of the return wire rope 410 is fixed to the propulsion beam 100 and the other end is fixed to the support plate 110. Specifically, a first mounting seat 420 is provided on the first cylinder 210 for mounting the return guide wheel 400. It should be noted that in this embodiment, the process wire rope 310 and the return wire rope 410 both adopt the same arrangement as the prior art, that is, the process wire rope 310 is wound around the process guide wheel 300 and distributed up and down, and the process wire ropes 310 on the upper and lower sides are parallel, and the process wire rope 310 is wound around the process guide wheel 300 and distributed left and right, and the return wire ropes 410 on the left and right sides are not parallel. In the prior art, such as Figure 1 and Figure 2 As shown, the distance between the progress guide wheel 300 and the return guide wheel 400 remains unchanged. When the return wire rope 410 is subjected to force to drive the support plate 110 to retreat, since the return wire ropes 410 on both sides of the return guide wheel 400 are not parallel, the length of the return wire rope 410 relative to the return guide wheel 400 is actually greater than the length of the progress wire rope 310 relative to the progress guide wheel 300. At this time, the progress wire rope 310 will be loose, causing the progress wire rope 310 to easily detach from the progress guide wheel 300.

[0048] During operation, if the support plate 110 needs to be retracted, the propulsion cylinder 200 is retracted to drive the return guide wheel 400 to move backward, thereby pulling the support plate 110 back along the propulsion beam 100 through the return wire rope 410. The propulsion cylinder 200 is retracted to make the process guide wheel 300, the first cylinder body 210, and the return guide wheel 400 move backward as a whole, and the telescopic device is extended to make the process guide wheel 300 move forward one end distance relative to the first cylinder body 210, thereby automatically tensioning the process wire rope 310 to prevent the process wire rope 310 from loosening and detaching from the process guide wheel 300; and if the support plate 110 needs to be advanced, the propulsion cylinder 200 is retracted to drive the return guide wheel 400 to move backward as a whole, and the telescopic device is extended to make the process guide wheel 300 move forward one end distance relative to the first cylinder body 210, thereby automatically tensioning the process wire rope 310 to prevent the process wire rope 310 from loosening and detaching from the process guide wheel 300; and if the support plate 110 needs to be advanced, the propulsion cylinder 2 00 is extended, driving the process guide wheel 300 to move forward, thereby pulling the pallet 110 forward along the propulsion beam 100 through the process wire rope 310, and the propulsion oil cylinder 200 is extended to make the process guide wheel 300, the first cylinder body 210, and the return guide wheel 400 move forward as a whole, while the telescopic device is retracted and reset, so that the process guide wheel 300 moves back one end distance relative to the first cylinder body 210, in preparation for the next retreat of the pallet 110. Since the pallet 110 moves forward by the process guide wheel 300 moving forward to drive the process wire rope 310 to pull the pallet 110 forward, the process wire rope 310 is always kept in a tensioned state when the pallet 110 moves forward. In addition, it should be noted that in actual use, due to the installation method of the return wire rope 410, the return wire rope 410 rarely becomes loose. The propulsion mechanism of the embodiment of the utility model is configured with a retractable telescopic device between the progress guide wheel 300 and the first cylinder body 210 of the propulsion cylinder 200, so that when the support plate 110 retreats, the telescopic device can be used to drive the progress guide wheel 300 to move forward a certain distance relative to the first cylinder body 210, so as to automatically tension the progress wire rope 310 to prevent the progress wire rope 310 from loosening.

[0049] It is understandable that both the forward steel wire rope 310 and the return steel wire rope 410 are fixed to the propulsion beam 100 via tensioning screws.

[0050] Reference Figure 3 As shown, it can be understood that the propulsion cylinder 200 and the telescopic device are telescopic along the same axis, that is, the two are coaxially telescopic, which can avoid the generation of torsional force and cause damage to the device and increase the service life.

[0051] Reference Figure 3 and Figure 4 As shown, it can be understood that the telescopic device is configured as a tensioning cylinder 500, which has a stable and reliable structure and strong practicality. Specifically, the tensioning cylinder 500 includes a second cylinder body 510 and a second piston rod 520. The second cylinder body 510 is fixed to the end of the first cylinder body 210 away from the first piston rod 220, that is, fixed to the front end of the first cylinder body 210. The second piston rod 520 is connected to the process guide wheel 300. Specifically, the second mounting seat 320 is arranged on the second piston rod 520.

[0052] Reference Figures 3 to 5As shown, in some specific embodiments, the propulsion cylinder 200 is configured as a double-acting cylinder, the first cylinder body 210 has a first rod chamber 201 and a first rodless chamber 202, the first rod chamber 201 and the first rodless chamber 202 are both used for oil inlet and outlet, when the propulsion cylinder 200 is extended, the first rodless chamber 202 is filled with oil and the first rod chamber 201 is discharged, when the propulsion cylinder 200 is contracted, the first rod chamber 201 is filled with oil and the first rodless chamber 202 is discharged; the tensioning cylinder 50 0 is set as a single-acting oil cylinder, the second cylinder body 510 has a second rod chamber 501 and a second rodless chamber 502, the second rodless chamber 502 is used for oil in and out, and the second rod chamber 501 is connected to the atmosphere, and the first rod chamber 201 is connected to the second rodless chamber 502; through the above-mentioned structural setting, when the support plate 110 needs to move forward during operation, the first rodless chamber 202 is filled with oil and the first rod chamber 201 is discharged, so that the propulsion oil cylinder 200 is extended and the first cylinder body 210 moves forward At this time, under the push of the first cylinder 210, the oil in the second rodless chamber 502 is discharged until the second piston rod 520 of the tensioning cylinder 500 abuts against the inner end of the second cylinder 510 and shrinks to the shortest length. Then, under the push of the first cylinder 210, the tensioning cylinder 500 and the process guide wheel 300 move forward together to drive the support plate 110 forward. As the propulsion force of the first cylinder 210 changes, the oil pressure peak in the tensioning cylinder 500 will not be too high. state, which can well guarantee the service life of the cylinder; when the support plate 110 needs to retract, the first rod chamber 201 is filled with oil and the first rodless chamber 202 is discharged with oil, so that the propulsion cylinder 200 contracts and the first cylinder body 210 moves backward. Since the first rod chamber 201 is connected to the second rodless chamber 502, the second rodless chamber 502 is also filled with oil, and the tensioning cylinder 500 is extended, so that the process guide wheel 300 moves forward relative to the first cylinder body 210, thereby tensioning the process wire rope 310.

[0053] Reference Figure 4 As shown, it can be understood that the second piston rod 520 is provided with a first sealing member 530 at one end close to the second rodless chamber 502, i.e., at the rear end, for isolating the second rod chamber 501 and the second rodless chamber 502, so as to prevent oil from entering the second rod chamber 501 or air from entering the second rodless chamber 502. Further, a second sealing member 540 is provided at the front end of the inner side of the second cylinder body 510, for sealing the front end of the second rod chamber 501 to prevent dust from entering, and a guide copper sleeve 550 for providing a sliding guide for the second piston rod 520 is also provided at the inner side of the second cylinder body 510.

[0054] Reference Figure 4 and Figure 5As shown, in some specific embodiments, the second cylinder body 510 is provided with an oil hole 511 connected to the second rodless chamber 502, and the oil hole 511 is used to connect to the first rod chamber 201 through a pipeline to facilitate the entry and exit of oil; in addition, the second cylinder body 510 is provided with an air hole 512 connecting the second rod chamber 501 with the atmosphere, and a filtering structure (not shown) is provided at the air hole 512 to prevent external dust from entering the second rod chamber 501.

[0055] Reference Figures 3 to 5 As shown, it can be understood that the propulsion mechanism of the embodiment of the utility model also includes a hydraulic system 600, and the hydraulic system 600 includes an oil tank 610, a hydraulic pump 620 and a control valve group 630. The hydraulic pump 620 is installed on the oil tank 610, and is used to pump out the oil in the oil tank 610. The control valve group 630 has a first oil port, a second oil port, a third oil port, and a fourth oil port. The first oil port of the control valve group 630 is used to connect the hydraulic pump 620, the second oil port is used to connect the oil tank 610, the third oil port is used to connect the first rodless chamber 202, and the fourth oil port is used to connect the first rod chamber 201 and the second rodless chamber 502. Specifically, the control valve group 630 has a function of connecting the first oil port to the fourth oil port and the second oil port to the third oil port. When the support plate 110 needs to retreat, the control valve group 630 is adjusted to the first state, and the oil is pumped into the first rod chamber 201 and the second rodless chamber 502 by the hydraulic pump 620, and the oil in the first rodless chamber 202 returns to the oil tank 610, so that the propulsion cylinder 200 contracts and the tensioning cylinder 500 extends. When the support plate 110 needs to advance, the control valve group 630 is adjusted to the second state, and the oil is pumped into the first rodless chamber 202 by the hydraulic pump 620, and the oil in the first rodless chamber 201 and the second rodless chamber 502 returns to the oil tank 610, so that the propulsion cylinder 200 extends and the tensioning cylinder 500 contracts. In some specific embodiments, the control valve group 630 includes a reversing valve group, and the reversing valve group is used to switch the state of the control valve group 630.

[0056] The utility model also proposes a rock drill system, which includes a rock drill 700 and a propulsion mechanism of the above embodiments, wherein the rock drill 700 is installed on a support plate 110, and the rock drill 700 is driven forward and backward by the propulsion mechanism to perform operations. Since the propulsion mechanism of the above embodiments is provided in this embodiment, all the beneficial effects brought by the above embodiments are obtained.

[0057] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A propulsion mechanism, characterized in that: include: A propulsion beam (100) provided with a movable support plate (110); A propulsion cylinder (200), comprising a first cylinder body (210) and a first piston rod (220), wherein the first piston rod (220) is fixed to the propulsion beam (100); a telescopic device, disposed at an end of the first cylinder body (210) away from the first piston rod (220) and capable of telescoping relative to the first cylinder body (210), the telescopic device being configured to extend when the propulsion cylinder (200) contracts and to contract when the propulsion cylinder (200) extends; A progress guide wheel (300) is arranged at the telescopic end of the telescopic device, and a progress wire rope (310) is wound around the progress guide wheel (300), with two ends respectively fixed to the propulsion beam (100) and the support plate (110); A return guide wheel (400) is arranged at one end of the first cylinder body (210) close to the first piston rod (220), and a return steel wire rope (410) is wound around the return guide wheel (400), with two ends respectively fixed to the propulsion beam (100) and the support plate (110); Wherein, the moving direction of the support plate (110), the telescopic direction of the propulsion cylinder (200), and the telescopic direction of the telescopic device are parallel.

2. The propulsion mechanism according to claim 1, characterized in that: The propulsion cylinder (200) and the telescopic device telescope along the same axis.

3. The propulsion mechanism according to claim 1, characterized in that: The telescopic device is configured as a tensioning cylinder (500), and the tensioning cylinder (500) includes a second cylinder body (510) and a second piston rod (520). The second cylinder body (510) is fixed to an end of the first cylinder body (210) away from the first piston rod (220), and the second piston rod (520) is connected to the progress guide wheel (300).

4. The propulsion mechanism according to claim 3, characterized in that: The propulsion cylinder (200) is configured as a double-acting cylinder, the first cylinder body (210) has a first rod chamber (201) and a first rodless chamber (202), both of which are used for the entry and exit of oil; the tensioning cylinder (500) is configured as a single-acting cylinder, the second cylinder body (510) has a second rod chamber (501) and a second rodless chamber (502), both of which are used for the entry and exit of oil; the second rod chamber (501) is connected to the atmosphere, and the first rod chamber (201) is connected to the second rodless chamber (502).

5. The propulsion mechanism according to claim 4, characterized in that: A first sealing member (530) is provided at one end of the second piston rod (520) close to the second rodless chamber (502) for isolating the second rod chamber (501) from the second rodless chamber (502).

6. The propulsion mechanism according to claim 4, characterized in that: The second cylinder body (510) is provided with an oil hole (511) communicating with the second rodless chamber (502), and the oil hole (511) is connected to the first rod chamber (201) through a pipeline.

7. The propulsion mechanism according to claim 4, characterized in that: The second cylinder body (510) is provided with an air hole (512) connecting the second rod chamber (501) with the atmosphere, and a filtering structure is provided at the air hole (512).

8. The propulsion mechanism according to claim 4, characterized in that: It also includes a hydraulic system (600), the hydraulic system (600) includes an oil tank (610), a hydraulic pump (620) and a control valve group (630), the control valve group (630) has a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port is used to connect to the hydraulic pump (620), the second oil port is used to connect to the oil tank (610), the third oil port is used to connect to the first rodless chamber (202), and the fourth oil port is used to connect to the first rod chamber (201) and the second rodless chamber (502).

9. The propulsion mechanism according to claim 8, characterized in that: The control valve group (630) includes a reversing valve group.

10. A rock drill system, characterized in that: include: The propulsion mechanism according to claim 1; A rock drill (700) is mounted on the support plate (110).

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